Grooved push rod device with plastic nut and processing method thereof

Abstract

The application relates to a slotted push rod device with plastic nuts, which comprises an input shaft, an upper shell, a lower shell, a transmission device, a screw rod, plastic nuts and a metal pipe. The plastic nuts are slotted plastic nut structures, gaps exist between adjacent slotted plastic nuts, the slotted plastic nut structure has two or more than two slotted plastic nuts, and at least two or more than two slotted plastic nuts are fixedly connected with the metal pipe. The slotted plastic nut structure has good self-lubricating performance and does not need frequent oiling, and can not be axially expanded under the condition of a large temperature difference and a large load. The application also relates to a production method of the slotted push rod device with plastic nuts.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of push rod device, and particularly relates to a slotted push rod device adopting a plastic nut and a processing method thereof, and especially to a push rod device suitable for a solar power tracking support and a processing method thereof. BACKGROUND

[0002] The technology of generating power by using a solar power device is more and more widely applied in the world. In order to maximize the utilization of solar energy by the solar power device, the existing technology realizes the lifting and / or real-time angle adjustment of a solar panel in the solar power device following different spatial angle positions of the sun by using a solar tracking support. The lifting and / or angle adjustment function of the solar tracking support is realized by using a push rod device. Since the outdoor environment used by the solar power device is harsh, the solar power device usually needs to work in an environment temperature of-30 DEG C to 70 DEG C, and the solar power device needs to work in a strong wind. Therefore, the use of the push rod device has strict requirements, and each set of push rod device must be able to bear a static load of not less than 3 tons and a dynamic load of not less than 1 ton.

[0003] In order to meet the requirements that the solar tracking support can normally work in an environment temperature of-30 DEG C to 70 DEG C, can bear a static load of not less than 3 tons and a dynamic load of not less than 1 ton, and has a working life of not less than 5000 hours, the push rod device used for realizing the lifting and / or angle adjustment function of the solar tracking support needs to have a design service life of more than 10000 times of lifting and / or angle adjustment cycles. The screw rod and the nut play a crucial role. In order to reduce the abrasion of the screw rod and the nut in the reciprocating screw motion, the screw rod is usually made of metal, but the nut is usually made of a copper nut and a plastic nut.

[0004] The copper nut has the following advantages: 1. The copper nut has high strength and can bear a large static load and a dynamic load when used in a harsh temperature environment with large temperature change; 2. The copper nut has a small linear expansion coefficient, and does not have the problem of axial expansion when the environmental temperature rises and falls. However, the copper nut has the following disadvantages: the self-lubricating ability of the copper nut is poor when used in a harsh temperature environment with large temperature change. For example, when the lifting distance of the copper nut is 1 meter and the dynamic load is 1 ton, the lifting frequency is less than 150 times, and the copper nut must be frequently lubricated to ensure smooth movement during the screw transmission of the screw rod. If the lifting frequency is about 200 times without lubrication, the screw rod can completely wear out the copper nut, and the entire push rod device loses the working ability.

[0005] The advantages of the plastic nut are that it has good self-lubricating performance, and can meet the lubrication requirement for the whole life cycle after adding lubricating grease once, and can ensure smooth screw transmission with the screw rod without frequent addition of lubricating oil. However, the plastic nut has the following disadvantages: the plastic material has poor strength and cannot bear large static load and dynamic load, and if the length of the single nut is increased to bear high static load and dynamic load, the plastic nut will be expanded axially and die in the axial direction in a severe temperature environment with large temperature change due to the large linear expansion coefficient of the plastic material. SUMMARY

[0006] The first object of the present application is to provide a slotted push rod device using a plastic nut, which has good self-lubricating performance and does not need frequent oiling, and which will not be expanded axially and die in the axial direction in a severe temperature environment with large temperature change and under the condition of bearing large load.

[0007] The second object of the present application is to provide a production method of a slotted push rod device using a plastic nut, which has good self-lubricating performance and does not need frequent oiling, and which will not be expanded axially and die in the axial direction in a severe temperature environment with large temperature change and under the condition of bearing large load.

[0008] In order to solve the above problems, the technical solution of the present application is as follows: the technical solution for achieving the first object of the present application is a slotted push rod device using a plastic nut, which comprises an input shaft, an upper housing, a lower housing, a transmission device, a screw rod, a plastic nut and a metal pipe. The upper housing and the lower housing are fixedly connected to form a reduction gearbox and form a space for accommodating the transmission device. The transmission device is a gear transmission mechanism or a worm gear transmission mechanism. The input shaft has an exposed end located outside the reduction gearbox and an inserted end located inside the reduction gearbox. The inserted end of the input shaft is a pinion shaft or a worm, and the pinion shaft or the worm of the inserted end of the input shaft is engaged with a first-stage gear or a worm gear of the transmission device, respectively. The last-stage gear or worm gear of the transmission device is fixedly connected with or integrated with the screw rod to drive the screw rod to rotate. The plastic nut is spirally installed on the screw rod, and one end of the metal pipe is fixedly connected with the outer periphery of the plastic nut. The screw rod drives the plastic nut to make reciprocating linear motion on the screw rod when the screw rod rotates. The improvement is that:

[0009] 1. A circumferential ring groove or a spiral groove is formed on the inner wall surface or the outer wall surface of the plastic nut.

[0010] 2. When the circumferential ring groove is formed on the inner wall surface or the outer wall surface of the plastic nut:

[0011] a. The plastic nut is a ring segment type plastic nut structure, which is composed of at least one or more circumferential ring grooves formed on the inner wall surface or the outer wall surface of the plastic nut.

[0012] b, the circumferential ring groove divides the plastic nut into at least two or more ring segments with their bases connected to each other, wherein n≥2, n is a positive integer, the groove width C1, C2, …Cn of each circumferential ring groove is greater than 0.05mm, n all greater than 0.05mm,

[0013] c, the length of each ring segment of the ring segment plastic nut is between 5-50mm,

[0014] d, the remaining thickness H between the groove bottom of the circumferential ring groove and the small diameter of the outer thread of the ring segment plastic nut is ≤2.0mm, or the remaining thickness I between the groove bottom of the spiral groove and the large diameter of the inner thread of the ring segment plastic nut is ≤2.0mm;

[0015] e, the outer thread of each ring segment of the ring segment plastic nut is simultaneously threadedly fixedly connected to the metal pipe, or each ring segment of the ring segment plastic nut is simultaneously fixedly connected to the pin and / or screw of one end of the metal pipe, or some of the ring segments of the ring segment plastic nut are fixedly connected to the pin and / or screw of one end of the metal pipe, and the rest of the ring segments are threadedly fixedly connected to one end of the metal pipe;

[0016] or, when the spiral groove is opened on the inner wall surface or the outer wall surface of the plastic nut:

[0017] a, the plastic nut is a spiral groove plastic nut structure, which is composed of at least one or more spiral grooves opened on the inner wall surface or the outer wall surface of the plastic nut, the distance from one groove end to the adjacent one end surface of the spiral groove plastic nut is S1, and the distance from the other groove end to the adjacent other end surface of the spiral groove plastic nut is S2, and S1≤50mm, S2≤50mm,

[0018] b, the angle around the spiral groove of the spiral groove plastic nut is greater than or equal to 360 degrees, and the groove width C of the spiral groove is greater than 0.05mm,

[0019] c, the pitch S of the spiral groove is between 5-50mm,

[0020] d, the remaining thickness H between the groove bottom of the spiral groove and the small diameter of the outer thread of the spiral groove plastic nut is ≤2.0mm, or the remaining thickness I between the groove bottom of the spiral groove and the large diameter of the inner thread of the spiral groove plastic nut is ≤2.0mm;

[0021] e, the outer thread of the spiral groove type plastic nut is threadedly fixedly connected with one end of the metal pipe, or the spiral groove type plastic nut is fixedly connected with a pin and / or a screw of one end of the metal pipe, or part of the spiral groove type plastic nut is fixedly connected with a pin and / or a screw of one end of the metal pipe and the rest is threadedly fixedly connected with one end of the metal pipe.

[0022] Further, the major diameter Ф2 of the outer thread of the lead screw is between 15-35mm, and the major diameter Ф4 of the inner thread of the plastic nut matched with the lead screw is between 30-50mm.

[0023] Further, the drive motor is fixedly connected with the lower shell, the driving shaft of the drive motor is the input shaft of the reduction box, the outer end face of the motor end cover of the drive motor is integrally formed with an annular boss, the input shaft of the drive motor is provided with a cap, the central hole of the cap is in shape consistent with the cross-sectional shape of the corresponding matching part of the input shaft, the cap is provided with a groove matched with the annular boss of the motor end cover, and the cap and the annular boss of the motor end cover form a labyrinth oil blocking structure.

[0024] Further, the reduction box is provided with a shell mounting head or a metal dustproof pipe with a shell mounting head, and the other end of the metal pipe is provided with a pipe wall connecting hole or is fixedly connected with a metal pipe mounting head.

[0025] Further, the reduction box is fixedly connected with a shell mounting head, the other end of the metal pipe is fixedly connected with a metal pipe mounting head, and the metal pipe mounting head and the shell mounting head are respectively located on the two sides of the reduction box, and the transmission device is a three-stage gear transmission mechanism or a one-stage worm and gear transmission mechanism.

[0026] Further, in the plastic nut, the helix angle Ψ of any one segment of the segmented plastic nut D1, D2, …D n is less than or equal to 2.90°, and the lead screw has an outer thread matched with the helix angle Ψ of the inner thread of the plastic nut.

[0027] To solve the above problems, the first technical solution to achieve the second object of the present application is that

[0028] A processing method of a slotted push rod device using a plastic nut, the improvement is that in the slotted push rod device using a plastic nut, the processing step of threadedly fixedly connecting the outer thread of each segment of the ring segment type plastic nut of the ring segment type plastic nut structure with one end of the metal pipe is as follows:

[0029] Step one: the outer periphery of the plastic nut blank is made into an outer thread matched with the inner thread of one end of the metal pipe;

[0030] Step two: at least one or more than one circumferential ring groove is made on the outer wall surface of the plastic nut blank, which divides the plastic nut into at least two or more than two ring segments with the base connected to each other, the length of each ring segment of the ring segment type plastic nut is between 5-50mm, the width of each circumferential ring groove is greater than 0.05mm, and the remaining thickness I of the wall thickness between the groove bottom of the circumferential ring groove and the major diameter of the internal thread of the ring segment type plastic nut is less than or equal to 2.0mm;

[0031] Step three: the adhesive glue is applied on the outer wall surface of the plastic nut blank, the adhesive glue is a thread fastening glue, and is rotated and installed into the metal pipe end, so that the plastic nut blank can reach the set screwing position of the metal pipe end and is thread fastening connected with the metal pipe end;

[0032] Step four: after the adhesive glue is solidified, the metal pipe outer circle is clamped, and the plastic nut blank is processed to have an internal thread matched with the external thread of the screw rod; the processing work of the external thread of each ring segment of the ring segment type plastic nut being thread fixedly connected with the metal pipe end is completed.

[0033] In order to solve the above problems, the second technical scheme for realizing the second object of the present application is,

[0034] A processing method of a segmented slotted push rod device using a plastic nut, the improvement is that the processing step of the external thread of each ring segment of the ring segment type plastic nut structure of the ring segment type plastic nut in the slotted push rod device using a plastic nut being thread fixedly connected with the metal pipe end is as follows:

[0035] Step one: the outer circumference of the plastic nut blank is made into an external thread matched with the internal thread of the metal pipe end;

[0036] Step two: the adhesive glue is applied on the outer wall surface of the plastic nut blank, the adhesive glue is a thread fastening glue, and is rotated and installed into the metal pipe end, so that the plastic nut blank can reach the set screwing position of the metal pipe end and is thread fastening connected with the metal pipe end;

[0037] Step three: after the glue solidifies, clamp the outer circle of the metal pipe, process the inner threaded small diameter hole of the plastic nut blank, and then open at least one or more than one circumferential ring groove on the inner threaded small diameter hole inner wall, the circumferential ring groove will cut the plastic nut into at least two or more annular segments with the base connected to each other, the length of each annular segment of the annular segment type plastic nut is between 5-50mm, the width of each circumferential ring groove is greater than 0.05mm, and the remaining thickness H between the groove bottom of the circumferential ring groove and the outer thread small diameter of the annular segment type plastic nut is ≤2.0mm;

[0038] Step four: process the plastic nut blank into an inner thread that matches the outer thread of the screw rod, and the outer thread of each annular segment of the annular segment type plastic nut is threadedly fixedly connected to one end of the metal pipe.

[0039] In order to solve the above problems, the third technical solution to achieve the second object of the application is,

[0040] A processing method of a slotted push rod device using a plastic nut, the improvement is that the processing step of threadedly fixedly connecting the outer thread of the helical groove type plastic nut of the helical groove type plastic nut structure in the slotted push rod device using a plastic nut to one end of the metal pipe is as follows:

[0041] Step one: make the outer periphery of the plastic nut blank into an outer thread that matches the inner thread of one end of the metal pipe;

[0042] Step two: open at least one or more than one helical groove on the outer wall surface of the plastic nut blank, the distance from one groove end to the adjacent one end surface of the helical groove type plastic nut is S1, the distance from the other groove end to the adjacent other end surface of the helical groove type plastic nut is S2, and S1≤50mm, S2≤50mm, the angle around the helical groove is greater than or equal to 360 degrees, the groove width C of the helical groove is greater than 0.05mm, the pitch S of the helical groove is between 5-50mm, and the remaining thickness I of the wall thickness between the groove bottom of the helical groove and the inner thread large diameter of the helical groove type plastic nut is ≤2.0mm;

[0043] Step three: apply adhesive to the outer wall surface of the plastic nut blank, the adhesive is thread fastening glue, and the plastic nut blank is rotated and installed into one end of the metal pipe to make the plastic nut blank reach the set rotation position of one end of the metal pipe and be threadedly fastened to one end of the metal pipe;

[0044] Step four: after the glue solidifies, clamp the outer circle of the metal pipe, and process the plastic nut blank into an internal thread that matches the external thread of the lead screw; the external thread of the spiral groove type plastic nut is threadedly fixedly connected to one end of the metal pipe, and the processing work is completed.

[0045] To solve the above problems, the fourth technical solution to achieve the second object of the application is,

[0046] A processing method of a slotted push rod device using a plastic nut, the improvement is that: in the slotted push rod device using a plastic nut, the processing step of threadedly fixedly connecting the external thread of the spiral groove type plastic nut of the spiral groove type plastic nut structure to one end of the metal pipe is as follows:

[0047] Step one: make the outer periphery of the plastic nut blank into an external thread that matches the internal thread of one end of the metal pipe;

[0048] Step two: apply adhesive to the outer wall surface of the plastic nut blank, the adhesive is thread locking glue, and the plastic nut blank is rotated and installed into one end of the metal pipe, so that the plastic nut blank can reach the predetermined screwing position of one end of the metal pipe, and is threadedly fixedly connected to one end of the metal pipe;

[0049] Step three: after the glue solidifies, clamp the outer circle of the metal pipe, process the internal thread small diameter hole of the plastic nut blank, and then open at least one or more spiral grooves on the inner wall surface of the internal thread small diameter hole, the distance from one groove end of the spiral groove to the adjacent one end surface of the spiral groove type plastic nut is S1, the distance from the other groove end to the adjacent other end surface of the spiral groove type plastic nut is S2, and S1≤50mm, S2≤50mm, the angle around the spiral groove is greater than or equal to 360 degrees, the groove width C of the spiral groove is greater than 0.05mm, the pitch S of the spiral groove is between 5-50mm, and the remaining thickness H of the wall thickness between the groove bottom of the spiral groove and the external thread small diameter of the spiral groove type plastic nut is ≤2.0mm;

[0050] Step four: process the plastic nut blank into an internal thread that matches the external thread of the lead screw, and the processing work of threadedly fixedly connecting the external thread of the spiral groove type plastic nut to one end of the metal pipe is completed.

[0051] The beneficial effects of the present application are: the slotted push rod device with plastic nut has good self-lubricating performance and does not need frequent oiling, so that it can smoothly move during screw transmission with the lead screw in the whole life cycle. It can be used in harsh temperature environment with large temperature difference and under the condition of bearing large static load and dynamic load. The plastic nut is cut into approximately segmental structure, and the length of each segment of the segmental structure is shortened. Therefore, the deformation amount of the plastic nut in the harsh temperature environment with large temperature difference is small, and the length deformation amount of each segmental plastic nut is very small and smaller than the gap between the matching tooth profile of the segmental plastic nut and the lead screw. Even if the plastic nut is used in the harsh temperature environment of-30℃ to 70℃, the axial expansion problem does not occur between the plastic nut and the lead screw.

[0052] The production method of the slotted push rod device with plastic nut has good self-lubricating performance and does not need frequent oiling, and can not be axially expanded in the harsh temperature environment with large temperature difference and under the condition of bearing large load. It is particularly suitable for the lifting and / or angle adjustment function of the solar power generation sun tracking support push rod device in the harsh temperature environment with large temperature difference and under the condition of bearing large load, and is also suitable for special environments and occasions, such as scientific experiments, polar exploration, deep sea exploration, desert or hot environment, etc. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 is the structure diagram of the circumferential ring groove on the inner wall surface of the plastic nut of the first embodiment of the slotted push rod device with plastic nut of the present application;

[0054] Figure 2 is the structure diagram of the spiral groove on the inner wall surface of the plastic nut of the first embodiment of the slotted push rod device with plastic nut of the present application;

[0055] Figure 3 is the partial cut structure diagram of the oil blocking structure of the first embodiment of the slotted push rod device with plastic nut of the present application;

[0056] Figure 4 is the enlarged partial cut structure diagram of the oil blocking structure of the first embodiment of the slotted push rod device with plastic nut of the present application;

[0057] Figure 5is the first oil blocking structure diagram of the first embodiment of the slotted push rod device with plastic nut of the present application;

[0058] Figure 6 is the second oil blocking structure diagram of the first embodiment of the slotted push rod device with plastic nut of the present application;

[0059] Figure 7 is the input shaft and lower shell installation diagram of the first embodiment of the slotted push rod device with plastic nut of the present application;

[0060] Figure 8 is the cut structure diagram of the plastic nut with circumferential ring groove on the metal pipe of the first embodiment of the slotted push rod device with plastic nut of the present application;

[0061] Figure 9 is the cut structure diagram of the plastic nut with circumferential ring groove on the switch contact ring of the first embodiment of the slotted push rod device with plastic nut of the present application;

[0062] Figure 10 is the cut structure diagram of the plastic nut with circumferential ring groove of the first embodiment of the slotted push rod device with plastic nut of the present application;

[0063] Figure 11 is the cut structure diagram of the plastic nut with single head spiral groove of the first embodiment of the slotted push rod device with plastic nut of the present application;

[0064] Figure 12 is the overall structure diagram of the second embodiment of the slotted push rod device with plastic nut of the present application;

[0065] Figure 13 is the overall structure diagram of the third embodiment of the slotted push rod device with plastic nut of the present application;

[0066] Figure 14 is the structure diagram of the third embodiment of the slotted push rod device with plastic nut of the present application along A-A direction;

[0067] Figure 15 is the overall structure diagram of the fourth embodiment of the slotted push rod device with plastic nut of the present application;

[0068] Figure 16 is the structure diagram of the fourth embodiment of the slotted push rod device with plastic nut of the present application along B-B direction;

[0069] Figure 17 is the fifth embodiment of the slotted push rod device using plastic nut of the present application, the structure diagram of the circumferential ring groove on the outer wall surface of the plastic nut;

[0070] Figure 18 is the fifth embodiment of the slotted push rod device using plastic nut of the present application, the structure diagram of the helical groove on the outer wall surface of the plastic nut;

[0071] Figure 19 is the fifth embodiment of the slotted push rod device using plastic nut of the present application, the cut structure diagram of the plastic nut with helical groove on the outer wall surface of the plastic nut screwed on the metal pipe;

[0072] Figure 20 is the fifth embodiment of the slotted push rod device using plastic nut of the present application, the cut structure diagram of the plastic nut with helical groove on the outer wall surface of the plastic nut screwed on the switch contact ring;

[0073] Figure 21 is the fifth embodiment of the slotted push rod device using plastic nut of the present application, the cut structure diagram of the plastic nut with circumferential ring groove on the outer wall surface of the plastic nut;

[0074] Figure 22 is the fifth embodiment of the slotted push rod device using plastic nut of the present application, the cut structure diagram of the plastic nut with single head helical groove on the outer wall surface of the plastic nut.

[0075] Figure 23 is the fifth embodiment of the slotted push rod device using plastic nut of the present application, the overall structure diagram of the plastic nut with single head helical groove on the outer wall surface of the plastic nut;

[0076] Figure 24 is the fifth embodiment of the slotted push rod device using plastic nut of the present application, the nut helical rise angle diagram;

[0077] Figure 25 is the first embodiment of the slotted push rod device using plastic nut of the present application, the cut structure diagram of the plastic nut with double head helical groove on the inner wall surface of the plastic nut;

[0078] Figure 26 is the fifth embodiment of the slotted push rod device using plastic nut of the present application, the overall structure diagram of the plastic nut with double head helical groove on the outer wall surface of the plastic nut.

[0079] In the figure: drive motor 100, input shaft 120, exposed end of output shaft 121, upper housing 200, lower housing 300, transmission 400, lead screw 500, nut 600, circumferential ring groove 601, helical groove 602, switch contact ring 700, metal tube 800, housing mounting head 901, metal tube mounting head 902, ring groove type plastic nut D1, ring groove type plastic nut D2, ring groove type plastic nut D3, ring groove type plastic nut D4. DETAILED DESCRIPTION

[0080] The technical solutions of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application.

[0081] Example One:

[0082] As shown in Figure 1 , Figure 2 , Figures 6 to 23 , Figure 25 , Figure 25 , it is a slotted push rod device using a plastic nut of the present application, comprising an input shaft 120, an upper housing 200, a lower housing 300, a transmission 400, a lead screw 500, a plastic nut 600 and a metal tube 800, the upper housing 200 and the lower housing 300 are fixedly connected to form a reduction gearbox and form a space for accommodating the transmission 400, the transmission 400 is a gear transmission mechanism or a worm gear transmission mechanism, the input shaft 120 has an exposed end 121 outside the reduction gearbox and an inserted end inside the reduction gearbox, the inserted end of the input shaft 120 is a pinion shaft or a worm, and the pinion shaft or the worm of the inserted end of the input shaft 120 is respectively engaged with the first-stage gear or the worm of the transmission 400, the last-stage gear or the worm of the transmission 400 is fixedly connected with or integrated with the lead screw 500 to drive the lead screw 500 to rotate, the plastic nut 600 is helically installed on the lead screw 500, and one end of the metal tube 800 is fixedly connected with the outer periphery of the plastic nut 600, the lead screw 500 drives the plastic nut 600 to make reciprocating linear motion on the lead screw 500 when the lead screw 500 rotates, and the improvement lies in that:

[0083] 1. A circumferential ring groove 601 or a helical groove 602 is formed on the inner wall surface or the outer wall surface of the plastic nut 600,

[0084] 2. When the circumferential ring groove 601 is formed on the inner wall surface or the outer wall surface of the plastic nut 600:

[0085] a. The plastic nut 600 is a ring segment type plastic nut structure, which is composed of at least one or more circumferential ring grooves 601 formed on the inner wall surface or the outer wall surface of the plastic nut 600,

[0086] b. The circumferential ring groove 601 cuts the plastic nut 600 into segmented plastic nuts D1, D2, ... D having at least two or more annular segments and whose bases are connected to each other. n , where n≥2, and n is a positive integer, the groove widths C1, C2, ... C of each circumferential ring groove 601 are n All are greater than 0.05mm,

[0087] c, the ring segment plastic nuts D1, D2, ...D n The length of each ring segment is between 5 and 50 mm.

[0088] d, from the bottom of the circumferential groove 601 to the ring segment plastic nuts D1, D2, ...D n The remaining thickness of the wall thickness between the minor diameter of the external thread H≤2.0mm, or the thickness from the bottom of the circumferential ring groove 601 to the ring segment plastic nut D1, D2, ...D n The remaining thickness of the wall between the major diameter of the internal thread is I≤2.0mm,

[0089] e, the ring segment plastic nuts D1, D2, ...D n The external threads of each ring segment are simultaneously fixedly connected with the metal pipe 800 by thread, or the ring segment plastic nuts D1, D2, ... D n Each ring segment is fixedly connected to one end of the metal tube 800 with a pin and / or screw, or the ring segment plastic nut D1, D2, ... D n Some of the annular segments are fixedly connected to one end of the metal tube 800 by pins and / or screws, while the remaining annular segments are fixedly connected to one end of the metal tube 800 by threads;

[0090] Alternatively, when the spiral groove 602 is formed on the inner wall or outer wall of the plastic nut 600:

[0091] a. The plastic nut 600 is a spiral groove plastic nut structure, which is composed of at least one or more spiral grooves 602 formed on the inner wall or outer wall of the plastic nut 600. The distance between one groove end of the spiral groove 602 and an adjacent end face of the spiral groove plastic nut is S1, and the distance between the other groove end and the adjacent end face of the spiral groove plastic nut is S2, and S1 ≤ 50 mm, S2 ≤ 50 mm.

[0092] b. The spiral groove 602 of the spiral groove type plastic nut has a winding angle greater than or equal to 360 degrees, and a groove width C of the spiral groove 602 is greater than 0.05 mm.

[0093] c. The pitch S of the helical groove 602 is between 5-50mm,

[0094] d. The remaining thickness H of the wall thickness between the groove bottom of the helical groove 602 and the small diameter of the outer thread of the helical groove plastic nut is ≤2.0mm, or the remaining thickness I of the wall thickness between the groove bottom of the helical groove 602 and the large diameter of the inner thread of the helical groove plastic nut is ≤2.0mm,

[0095] e. The outer thread of the helical groove plastic nut is threadedly fixedly connected to one end of the metal pipe 800, or the helical groove plastic nut is fixedly connected to one end of the metal pipe 800 by a pin and / or a screw, or part of the helical groove plastic nut is fixedly connected to one end of the metal pipe 800 by a pin and / or a screw, and the remaining part is fixedly connected to one end of the metal pipe 800 by a thread.

[0096] In the present application, the reduction gearbox encloses the transmission device 400 in the space enclosed by the upper housing 200 and the lower housing 300, and the input shaft 120 and the exposed end 121 can be a one-piece structure or a split structure installed as a whole. The input shaft 120 extends into the space enclosed by the upper housing 200 and the lower housing 300, and the unthreaded end of the input shaft 120 is a straight shaft and is in meshing engagement with the first-stage straight gear of the transmission device 400; or the unthreaded end of the input shaft 120 is a helical shaft and is in meshing engagement with the first-stage helical gear of the transmission device 400; or the unthreaded end of the input shaft 120 is a worm and is in meshing engagement with the first-stage worm gear of the transmission device 400. The metal pipe 800 and the plastic nut 600 can be connected by various ways such as but not limited to threaded connection, pin connection, screw connection, and clamping spring connection, so as to be fixedly connected as a whole. Taking threaded connection as an example, the inner circumferential wall of the metal pipe 800 has a thread type matching the plastic nut 600, and the plastic nut 600 is positioned inside the metal pipe 800 by using threaded fastening glue or anaerobic glue at the threaded contact part with the metal pipe 800, so as to be fixedly connected with the metal pipe 800.

[0097] 1. In the present application, when the circumferential ring groove 601 is opened on the inner wall surface or the outer wall surface of the plastic nut: according to the length of the plastic nut 600 loaded in the actual slotting type push rod device, the circumferential ring groove 601 can be one or multiple, and the circumferential ring groove 601 is opened at equal or unequal intervals along the axial direction of the plastic nut 600;

[0098] In order to prevent the plastic nut 600 from axial expansion at high or low temperatures, which would cause the slotted push rod device using the plastic nut 600 to fail in adjusting the lifting and / or angle of the push rod device of the solar power generation sun tracking bracket, the plastic nut 600 is made into the ring-shaped plastic nuts D1, D2, ...D n， The groove widths C1, C2, ..., C of each circumferential ring groove 601 are n All are greater than 0.05mm;

[0099] Ensure that the ring segment plastic nuts D1, D2, ...D n When the static load and dynamic load that each section can bear can meet the design requirements, the slotted ring segment plastic nuts D1, D2, ... D n The length of each section is 25±2mm, and the ring-shaped plastic nuts D1, D2, ...D under this length are n The static load and dynamic load that can be borne reach the maximum;

[0100] The plastic nut 600 is formed into a circumferential ring groove 601, and the bottom of the circumferential ring groove 601 is connected to the ring segment plastic nuts D1, D2, ...D n The remaining thickness H of the wall between the minor diameters of the external threads is ≤ 2.0 mm, which is beneficial for keeping the plastic nut 600 intact after being slotted, and preventing the plastic nut 600 from being cut and broken due to excessive cutting. The minimum remaining thickness H can be close to 0.1 mm according to actual usage and processing conditions.

[0101] The plastic nut 600 is formed into a circumferential ring groove 601, and the bottom of the circumferential ring groove 601 is connected to the ring segment plastic nuts D1, D2, ...D n The retained wall thickness I between the major diameter of the internal thread is ≤2.0 mm, which is beneficial to keeping the slotted plastic nut 600 as a whole and avoiding the plastic nut 600 from being cut and broken due to excessive cutting. According to actual usage and processing conditions, the minimum retained thickness I can be close to 0.1 mm.

[0102] 2. In the present invention, when the spiral groove 602 is formed on the inner wall or outer wall of the plastic nut 600, the spiral groove 602 can be a single-start spiral groove or a multi-start spiral groove, and a double-start spiral groove is preferred among the multi-start spiral grooves.

[0103] To prevent the plastic nut 600 from axially expanding at high or low temperatures, which would cause the slotted push rod device using the plastic nut to fail in adjusting the lift and / or angle of the push rod device of the solar tracking bracket, the plastic nut 600 is made into the spiral groove type plastic nut with a groove width C greater than 0.05 mm.

[0104] In the case of ensuring that the static load and dynamic load that each section of the slotted plastic nut can bear meet the design requirements, the pitch S of the helical groove 602 is preferably 25±2 mm, at which the helical groove formed by the helical groove can bear the maximum static load and dynamic load;

[0105] The remaining thickness H between the groove bottom of the helical groove 602 and the small diameter of the external thread of the helical groove plastic nut is ≤2.0 mm, which is beneficial to keeping the slotted plastic nut 600 as a whole and avoiding being cut and broken due to excessive cutting. According to the actual use and processing conditions, the remaining thickness H can be as small as close to 0.1 mm.

[0106] The remaining thickness I between the groove bottom of the helical groove 602 and the large diameter of the internal thread of the helical groove plastic nut is ≤2.0 mm, which is beneficial to keeping the slotted plastic nut 600 as a whole and avoiding being cut and broken due to excessive cutting. According to the actual use and processing conditions, the remaining thickness I can be as small as close to 0.1 mm.

[0107] As shown in Figures 8 to 11 , Figures 19 to 23 , Figure 25 , Figure 26 In the slotted push rod device using the plastic nut of the present application, the total length E2 of the plastic nut 600 when bearing a dynamic load of 1-2 tons is between 50-200 mm. When the plastic nut 600 bears a dynamic load of 1 ton, the total length E2 is between 50-150 mm, and all slotted plastic nuts in this total length size range can bear a dynamic load of 1 ton and a static load of 3 tons or more. When the plastic nut 600 bears a dynamic load of 2 tons, the total length E2 is between 100-200 mm, and all slotted plastic nuts in this total length size range can bear a dynamic load of 2 tons and a static load of 5-10 tons.

[0108] As shown in Figures 8 to 11 , Figures 19 to 26 In the slotted push rod device using the plastic nut of the present application, the large diameter Ф2 of the external thread of the lead screw 500 is between 15-35 mm, and the large diameter Ф4 of the internal thread of the plastic nut 600 that matches it is between 30-50 mm. The matching selection of the lead screw 500 and the plastic nut 600 can make the segmented plastic nut 600 still have good comprehensive mechanical properties in harsh temperature environments with large temperature differences, so that it has the ability to bear large static loads and dynamic loads.

[0109] As shown in Figure 1 , Figure 2 , Figure 3 ,Figure 12 、 Figure 13 、 Figure 15 、 Figure 17 、 Figure 18 As shown in the figures, in the slotted push rod device with plastic nut of the present application, a switch contact ring 700 is screwed and fixed on the part of the plastic nut 600 exposed on one end of the metal pipe 800, or the switch contact ring 700 is screwed and fixed on one end of the metal pipe 800. To prevent the nut 600 and the switch contact ring 700 or the metal pipe 800 from being separated, anaerobic glue or thread fastening glue is applied to the screwing part for fixed connection. The switch contact ring 700 is installed with a switch for starting the driving motor 100 of the electric push rod device. When the electric push rod device needs to realize the lifting and / or angle adjustment of the external mechanism, the switch device on the switch contact ring 700 is touched by the moving part on the external mechanism for starting the electric push rod device, so that the driving motor 100 is powered and rotated to start, the input shaft 120 rotates through the driving device 400, so that the lead screw 500 rotates, and then the nut 600 screwed and fixed with the metal pipe 800 realizes reciprocating linear motion, so as to realize the function of the whole electric push rod device to lift and / or adjust the angle of the external mechanism.

[0110] As Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7As shown, the slotted push rod device with plastic nut of the present application also has a driving motor 100, the driving motor 100 is fixedly connected with the lower shell 300, the driving shaft of the driving motor 100 is the input shaft 120 of the reduction box body, the outer end surface of the motor end cover 110 of the driving motor 100 has an integral annular boss 111, the input shaft 120 of the driving motor 100 is provided with a cap 130, the shape of the central hole of the cap 130 is consistent with the shape of the cross section of the corresponding matching part of the input shaft 120, the cap 130 has a groove matched with the annular boss 111 of the motor end cover 110, and the cap 130 and the annular boss 111 of the motor end cover 110 form a labyrinth oil blocking structure. The shape of the central hole of the cap 130 is a tooth shape or a circular shape, which is consistent with the tooth shape or the circular shape of the cross section of the corresponding matching part of the input shaft 120, the cap 130 and the input shaft 120 adopt interference fit, the groove of the cap 130 and the annular boss 111 of the motor end cover 110 have a gap to form a space separation, the separation gap can be between 0.2-0.5mm, the separation gap of 0.2-0.5mm can make the cap 130 integrally installed on the input shaft 120 of the driving motor 100 by interference fit not rub with the annular boss 111 driven by the rotation of the input shaft 120, and will not cause the blocking of the rotation of the driving motor 100. At the same time, the cap 130 and the annular boss 111 form an oil blocking structure that can prevent the lubricating grease from flowing from the inside of the reduction box body to the inside of the driving motor, which solves the problem that the lubricating grease seeps into the inside of the driving motor along the driving shaft of the driving motor.

[0111] As Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7As shown, in the sectional push rod device of the present application using plastic nut, the cap 130 is in interference fit with the input shaft 120, the cap 130 is in umbrella structure, and the cap 130 keeps a certain gap to cover or partially cover the annular boss 111 of the motor end cover 110. When the pinion or worm of the input shaft 120 of the drive motor 100 is in meshing transmission with the first stage straight-toothed shaft, helical-toothed shaft or worm of the transmission device 400, the lubricating grease between the transmission device 400 and the input shaft 120 for realizing lubrication function is blocked outside the cap 130, and flows along the outer surface of the umbrella structure of the cap 130 into the annular recessed cavity space formed by the connection of the motor end cover 110 and the lower housing 300, and the annular boss 111 inside the cap 130 forms a stepped labyrinth structure with the cap 130. Even if the height of the lubricating grease in the annular recessed cavity space formed by the connection of the motor end cover 110 and the lower housing 300 exceeds the height of the cap 130, the lubricating grease cannot flow into the annular boss 111 above the input shaft 120 due to the stepped labyrinth structure and the centrifugal force of the attached grease acting on the cap 130 and the annular boss 111, so that the cap 130 and the annular boss 111 form an oil blocking structure that can prevent the lubricating grease from flowing from the reduction gearbox to the inside of the drive motor, which solves the problem of lubricating grease penetrating into the inside of the drive motor along the drive shaft of the drive motor in the prior art.

[0112] As shown, Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, in the sectional push rod device of the present application using plastic nut, the outer periphery of the cap 130 is in circular or polygonal structure, and the center hole of the cap 130 is in inner gear ring shape or circular shape. The annular boss 111 matched with the cap 130 to form a labyrinth oil blocking structure is also in circular or polygonal structure. The shape of the center hole of the cap 130 is consistent with the cross section of the corresponding matching part of the input shaft 120, and the versatility of the cap 130 is more extensive in combination with the versatility of the shape of the center hole of the cap 130, which can be applied to input shafts 120 of different shapes and motor end covers 110 with different types of annular bosses 111, and can be selected according to different motor end covers 110 for matching the cap 130 with the annular boss 111 of the motor end cover 110.

[0113] As shown, Figure 1 ,Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown in the figures, in the sectional push rod device of the application using plastic nut, the cap 130 is made of engineering plastic or metal material, and the motor end cover 110 is made of metal material. When the cap 130 and the motor end cover 110 are matched with each other, there are two material combination modes as follows: 1. The cap 130 and the motor end cover 110 are both made of metal material; 2. The motor end cover 110 is made of metal material, and the cap 130 is made of engineering plastic. The combination of different materials can achieve the best wear reduction effect. When the driving motor 100 drives the cap 130 on the input shaft 120 to rotate, even if the cap 130 rubs against the annular boss 111 of the motor end cover 110, the cap 130 will not be excessively worn and damaged.

[0114] As shown in the figures, Figure 1 、 Figure 2 、 Figure 3 、 Figure 12 、 Figure 13 、 Figure 15 、 Figure 17 、 Figure 18 As shown in the figures, in the slotted push rod device of the application using plastic nut, the reduction box body is provided with a shell mounting head 901 or a metal dustproof pipe with a shell mounting head 901, and the other end of the metal pipe 800 is provided with a pipe wall connecting hole or is fixedly connected with a metal pipe mounting head 902. Specifically, the shell mounting head 901 is mounted on the upper shell 200 of the reduction box body or the shell mounting head 901 is mounted on the lower shell 300 of the reduction box body; or the upper shell 200 of the reduction box body and the shell mounting head 901 are integrally formed, or the lower shell 300 of the reduction box body and the shell mounting head 901 are integrally formed; or the shell mounting head 901 is located on the metal dustproof pipe which is integrally connected with the reduction box body, or is located on the parts which are connected with the reduction box body. The shell mounting head 901 can be used to connect the fixed end of the external mechanism, the metal pipe mounting head 902 can be used to connect the moving end of the external mechanism, and vice versa.

[0115] As shown in the figures, Figure 1 、 Figure 2 、 Figure 3 、 Figure 12 、 Figure 13 、 Figure 15 、 Figure 17 、 Figure 18As shown in the figure, the slot type push rod device of the application adopts plastic nut, the reduction gearbox is fixedly connected on the shell mounting head 901, the other end of the metal pipe 800 is fixedly connected with a metal pipe mounting head 902, and the metal pipe mounting head 902 and the shell mounting head 901 are located on the two sides of the reduction gearbox respectively, and the transmission device 400 is a three-stage gear transmission mechanism or a one-stage worm gear transmission mechanism. Of course, it can also be changed to adopt the metal dustproof pipe provided with the shell mounting head 901 on the reduction gearbox, and the other end of the metal pipe 800 is provided with a pipe wall connecting hole mounting structure, so as to be suitable for the occasion with compact position. The transmission device 400 can also be a gear transmission mechanism of not less than two stages or a one-stage or multi-stage worm gear transmission mechanism. Such transmission device 400 can realize the simplification of structure under the premise of meeting the transmission function, wherein the three-stage gear transmission mechanism or the one-stage worm gear transmission mechanism is preferably adopted; according to the output torque of the driving motor 100 and the different rotating speed of the input shaft 120, in order to achieve the best function of driving the screw rod 500 to drive the nut 600 to ascend and realize the function of the electric push rod device, the two-stage or four-stage gear transmission mechanism or the two-stage worm gear transmission mechanism can also be selected.

[0116] As shown in the figure, Figure 1 , Figure 3 , Figure 4 , Figure 7 , Figures 12 to 17 As shown in the figure, the slot type push rod device of the application adopts plastic nut, the reduction gearbox is fixedly connected on the shell mounting head 901, the other end of the metal pipe 800 is fixedly connected with a metal pipe mounting head 902, and the metal pipe mounting head 902 and the shell mounting head 901 are located on the two sides of the reduction gearbox respectively, and the transmission device 400 is a three-stage gear transmission mechanism or a one-stage worm gear transmission mechanism. Of course, it can also be changed to adopt the metal dustproof pipe provided with the shell mounting head 901 on the reduction gearbox, and the other end of the metal pipe 800 is provided with a pipe wall connecting hole mounting structure, so as to be suitable for the occasion with compact position. The transmission device 400 can also be a gear transmission mechanism of not less than two stages or a one-stage or multi-stage worm gear transmission mechanism. Such transmission device 400 can realize the simplification of structure under the premise of meeting the transmission function, wherein the three-stage gear transmission mechanism or the one-stage worm gear transmission mechanism is preferably adopted; according to the output torque of the driving motor 100 and the different rotating speed of the input shaft 120, in order to achieve the best function of driving the screw rod 500 to drive the nut 600 to ascend and realize the function of the electric push rod device, the two-stage or four-stage gear transmission mechanism or the two-stage worm gear transmission mechanism can also be selected.

[0117] As shown in the figure, Figure 24 As shown in the figure, the slot type push rod device of the application adopts plastic nut, the reduction gearbox is fixedly connected on the shell mounting head 901, the other end of the metal pipe 800 is fixedly connected with a metal pipe mounting head 902, and the metal pipe mounting head 902 and the shell mounting head 901 are located on the two sides of the reduction gearbox respectively, and the transmission device 400 is a three-stage gear transmission mechanism or a one-stage worm gear transmission mechanism. Of course, it can also be changed to adopt the metal dustproof pipe provided with the shell mounting head 901 on the reduction gearbox, and the other end of the metal pipe 800 is provided with a pipe wall connecting hole mounting structure, so as to be suitable for the occasion with compact position. The transmission device 400 can also be a gear transmission mechanism of not less than two stages or a one-stage or multi-stage worm gear transmission mechanism. Such transmission device 400 can realize the simplification of structure under the premise of meeting the transmission function, wherein the three-stage gear transmission mechanism or the one-stage worm gear transmission mechanism is preferably adopted; according to the output torque of the driving motor 100 and the different rotating speed of the input shaft 120, in order to achieve the best function of driving the screw rod 500 to drive the nut 600 to ascend and realize the function of the electric push rod device, the two-stage or four-stage gear transmission mechanism or the two-stage worm gear transmission mechanism can also be selected.

[0117] As shown in the figure, Figure 24 As shown in the figure, the slot type push rod device of the application adopts plastic nut, the reduction gearbox is fixedly connected on the shell mounting head 901, the other end of the metal pipe 800 is fixedly connected with a metal pipe mounting head 902, and the metal pipe mounting head 902 and the shell mounting head 901 are located on the two sides of the reduction gearbox respectively, and the transmission device 400 is a three-stage gear transmission mechanism or a one-stage worm gear transmission mechanism. Of course, it can also be changed to adopt the metal dustproof pipe provided with the shell mounting head 901 on the reduction gearbox, and the other end of the metal pipe 800 is provided with a pipe wall connecting hole mounting structure, so as to be suitable for the occasion with compact position. The transmission device 400 can also be a gear transmission mechanism of not less than two stages or a one-stage or multi-stage worm gear transmission mechanism. Such transmission device 400 can realize the simplification of structure under the premise of meeting the transmission function, wherein the three-stage gear transmission mechanism or the one-stage worm gear transmission mechanism is preferably adopted; according to the output torque of the driving motor 100 and the different rotating speed of the input shaft 120, in order to achieve the best function of driving the screw rod 500 to drive the nut 600 to ascend and realize the function of the electric push rod device, the two-stage or four-stage gear transmission mechanism or the two-stage worm gear transmission mechanism can also be selected. nThe plastic nut 600 has a pitch angle Ψ of the inner thread of the plastic nut 600 being less than or equal to 2.90°, and the lead screw 500 has an outer thread matching the pitch angle Ψ of the inner thread of the plastic nut 600. When the external environment temperature reaches 70℃, the plastic nut 600 still has the self-locking function to the lead screw 500 in the self-locking push rod device only if the pitch angle Ψ is less than or equal to 2.90°; when the external environment temperature reaches 70℃, the plastic nut 600 no longer has the self-locking function to the lead screw 500 in the self-locking push rod device if the pitch angle Ψ is greater than 2.90°. The self-locking push rod device has good self-lubricating performance and does not need frequent oiling because the plastic nut is used, so that the self-locking push rod device can move smoothly in the screw transmission process with the lead screw in the whole life cycle without adding lubricating oil again. Meanwhile, the pitch angle of the inner thread of the plastic nut and the outer thread of the lead screw is reduced because the pitch angle Ψ of the inner thread of the plastic nut is less than or equal to 2.90° and the lead screw has the outer thread matching the pitch angle Ψ of the inner thread of the plastic nut. In the case of large temperature difference and large load, the plastic nut and the lead screw are cooperated to perform the screw transmission, so that the plastic nut has the self-locking function to the lead screw and has high self-locking ability when the self-locking push rod device reaches the set lifting height and / or angle position. That is, when the driving force is lost and the axial load force continues to exist, the lead screw does not rotate relatively in the plastic nut and can be well self-locked, so that the whole push rod device can be well kept at the set lifting height and / or angle position and does not cause equipment and safety accidents.

[0118] As shown in Figure 1 , Figure 2 , Figures 8 to 13 , Figure 15 , Figure 17 Figure 23 , Figure 25 , Figure 26 As shown in the slotted push rod device with the plastic nut of the present application, the plastic nut 600 is a slotted plastic nut with four sections, and the four sections of the slotted plastic nut D1, D2, D3 and D4 are simultaneously threadedly fixedly connected with the metal pipe 800. n Each section of the four sections of the slotted plastic nut D1, D2, … D n and the metal pipe 800 can be fixedly connected by increasing the application of adhesive glue to enhance the fixed connection reliability of the two; or the four sections of the slotted plastic nut D1, D2, … D n are fixedly connected with the metal pipe 800 by the threaded connection, and the slotted plastic nut D1, D2, … D nThe fixing connection reliability between the metal pipe 800 and the plastic nut 600 can be further enhanced by applying adhesive.

[0119] Embodiment two:

[0120] As shown in Figure 1 , Figure 2 , Figures 8 to 13 , Figure 15 , Figures 17 to 23 , Figure 25 , Figure 26 The application provides a first processing method for the slotted push rod device with a plastic nut, and the improvement lies in that the outer threads of each ring segment of the ring segment type plastic nut D1, D2, …D n are simultaneously threadedly fixed to one end of the metal pipe 800, and the processing steps are as follows:

[0121] Step one: the outer periphery of the plastic nut 600 blank is made into outer threads matching the inner threads of one end of the metal pipe 800;

[0122] Step two: at least one or more than one circumferential ring groove 601 is opened on the outer wall surface of the plastic nut 600 blank, the circumferential ring groove 601 divides the plastic nut 600 into a ring segment type plastic nut D1, D2, …D n with at least two or more ring segments and their bases connected to each other, the length of each ring segment of the ring segment type plastic nut D1, D2, …D n is between 5-50mm, the groove width C1, C2, … C n of each circumferential ring groove 601 is greater than 0.05mm, and the remaining thickness I of the wall thickness between the groove bottom of the circumferential ring groove 601 and the large diameter of the inner threads of the ring segment type plastic nut D1, D2, …D n is less than or equal to 2.0mm;

[0123] Step three: adhesive is applied to the outer wall surface of the plastic nut 600 blank, the adhesive is thread fastening adhesive, and the plastic nut 600 blank is rotated and installed into one end of the metal pipe 800, so that the plastic nut 600 blank can reach the set screwing position of one end of the metal pipe 800 and be threadedly fastened to one end of the metal pipe 800;

[0124] Step four: after the adhesive solidifies, the outer circle of the metal pipe 800 is clamped, and the plastic nut 600 blank is processed into inner threads matching the outer threads of the lead screw 500; each ring segment of the ring segment type plastic nut D1, D2, …D nThe outer thread of each segment of the ring segment is threadedly fixedly connected to one end of the metal pipe 800.

[0125] Embodiment three:

[0126] As shown in Figure 1 , Figure 2 , Figures 8 to 13 , Figure 15 , Figures 17 to 23 , Figure 25 , Figure 26 The second segmented slotted push rod device using a plastic nut is provided, and the improvement lies in that the outer thread of each segment of the ring segment of the ring segment type plastic nut structure of the segmented slotted push rod device using a plastic nut D1, D2, … D n is threadedly fixedly connected to one end of the metal pipe 800.

[0127] Step one: the outer periphery of the plastic nut 600 blank is made into an outer thread that matches the inner thread of one end of the metal pipe 800;

[0128] Step two: the outer wall surface of the plastic nut 600 blank is smeared with adhesive, the adhesive is thread fastening adhesive, and is rotated and installed into one end of the metal pipe 800, so that the plastic nut 600 blank can reach the screwed position set in one end of the metal pipe 800, and is threadedly fastened to one end of the metal pipe 800;

[0129] Step three: after the adhesive solidifies, the outer circle of the metal pipe is clamped, the inner thread small diameter hole of the plastic nut 600 blank is processed, and at least one or more circumferential ring grooves 601 are opened on the inner wall surface of the inner thread small diameter hole, the circumferential ring grooves 601 divide the plastic nut 600 into a ring segment type plastic nut D1, D2, … D n , which has at least two or more ring segments and whose base bodies are connected to each other; n The length of each ring segment of the ring segment type plastic nut D1, D2, … D n is between 5-50mm, the groove width C1, C2, … C n of each circumferential ring groove 601 is greater than 0.05mm, and the remaining thickness H of the wall thickness between the groove bottom of the circumferential ring groove 601 and the outer thread small diameter of the ring segment type plastic nut D1, D2, … D n is ≤2.0mm;

[0130] Step four: the plastic nut 600 blank is processed to have an inner thread that matches the outer thread of the lead screw 500, and the ring segment type plastic nut D1, D2, … D nThe outer thread of each segment of the annular segment is threadedly fixedly connected to one end of the metal pipe 800.

[0131] Embodiment Four:

[0132] As shown in Figure 1 , Figure 2 , Figures 8 to 13 , Figure 15 , Figures 17 to 23 , Figure 25 , Figure 26 The third processing method for the slotted push rod device with a plastic nut is provided, and the improvement lies in that the outer thread of the helical groove type plastic nut of the helical groove type plastic nut structure in the slotted push rod device with a plastic nut is threadedly fixedly connected to one end of the metal pipe 800 in the following steps.

[0133] Step one: the outer periphery of the plastic nut 600 blank is made into an outer thread that matches the inner thread of one end of the metal pipe 800;

[0134] Step two: at least one or more helical grooves 602 are opened on the outer wall surface of the plastic nut 600 blank, the distance from one groove end of the helical groove 602 to the adjacent one end surface of the helical groove type plastic nut is S1, the distance from the other groove end to the adjacent other end surface of the helical groove type plastic nut is S2, and S1≤50mm, S2≤50mm, the winding angle of the helical groove 602 is greater than or equal to 360 degrees, the groove width C of the helical groove 602 is greater than 0.05mm, the pitch S of the helical groove 602 is between 5-50mm, and the remaining thickness I of the groove bottom to the wall thickness between the large diameter of the inner thread of the helical groove type plastic nut is ≤2.0mm;

[0135] Step three: the outer wall surface of the plastic nut 600 blank is smeared with adhesive, the adhesive is thread fastening adhesive, and is rotated and installed into one end of the metal pipe 800, so that the plastic nut 600 blank can reach the set screwing position of one end of the metal pipe 800 and be threadedly fastened to one end of the metal pipe 800;

[0136] Step four: after the adhesive solidifies, the outer circle of the metal pipe is clamped, the plastic nut 600 blank is processed into an inner thread that matches the outer thread of the screw rod 500, and the processing work of threadedly fixing the outer thread of the helical groove type plastic nut of the helical groove type plastic nut structure to one end of the metal pipe 800 is completed.

[0137] Embodiment Five:

[0138] As shown in Figure 1 , Figure 2 , Figures 8 to 13、 Figure 15 、 Figures 17 to 23 、 Figure 25 、 Figure 26 Figure 1 Figure 2 Figures 8 to 13 Figure 15 Figures 17 to 23 Figure 25 Figure 26 As shown in the fourth plastic nut slot type push rod device, the improvement is that the outer thread of the spiral groove type plastic nut structure of the spiral groove type plastic nut in the fourth plastic nut slot type push rod device is connected with one end of the metal pipe 800 by the following steps:

[0139] Step one: the outer thread of the plastic nut 600 blank is made to match the inner thread of one end of the metal pipe 800;

[0140] Step two: the outer wall surface of the plastic nut 600 blank is coated with adhesive, the adhesive is thread fastening glue, and the plastic nut 600 blank is rotated and installed into one end of the metal pipe 800, so that the plastic nut 600 blank can reach the set rotation position of one end of the metal pipe 800 and be connected with one end of the metal pipe 800 by thread fastening;

[0141] Step three: after the adhesive solidifies, the outer circle of the metal pipe is clamped, the inner thread small diameter hole of the plastic nut 600 blank is processed, and at least one or more spiral grooves 602 are opened on the inner wall surface of the inner thread small diameter hole, the distance from one groove end of the spiral groove 602 to the adjacent one end surface of the spiral groove type plastic nut is S1, the distance from the other groove end to the adjacent other end surface of the spiral groove type plastic nut is S2, and S1≤50mm, S2≤50mm, the winding angle of the spiral groove 602 is greater than or equal to 360 degrees, the groove width C of the spiral groove 602 is greater than 0.05mm, the pitch S of the spiral groove 602 is between 5-50mm, and the remaining thickness H of the groove bottom to the wall thickness between the outer thread small diameter of the spiral groove type plastic nut is ≤2.0mm;

[0142] Step four: the plastic nut 600 blank is processed to have an inner thread matching the outer thread of the screw rod 500, and the outer thread of the spiral groove type plastic nut is connected with one end of the metal pipe 800 by thread fastening.

[0143] The push rod device using the above implementation method can greatly reduce production cost and improve efficiency by using plastic nuts instead of copper nuts, especially the present embodiment can adapt to large-scale production, maximize market demand, and greatly improve enterprise efficiency, while producing great social and economic benefits. Because the push rod device uses copper nuts, it must be frequently injected with lubricating oil, and a general power plant has thousands of push rod devices, which requires huge cost, manpower and material resources for frequent injection of lubricating oil.

Claims

1. A slotted push rod device using a plastic nut, comprising an input shaft (120), an upper shell (200), a lower shell (300), a transmission device (400), a screw (500), a plastic nut (600) and a metal tube (800), wherein the upper shell (200) and the lower shell (300) are fixedly connected to form a reduction box and form a space for accommodating the transmission device (400), wherein the transmission device (400) is a gear transmission mechanism or a worm gear transmission mechanism, wherein the input shaft (120) has an exposed end (121) located outside the reduction box and an extended end located inside the reduction box, wherein the input shaft (120) ) is a gear shaft or a worm, and the gear shaft or worm at the end of the input shaft (120) is respectively meshed with the first-stage gear or worm wheel of the transmission device (400), the final-stage gear or worm wheel of the transmission device (400) is fixedly connected to or made into one piece with the screw rod (500), driving the screw rod (500) to rotate, the plastic nut (600) is spirally mounted on the screw rod (500), and one end of the metal tube (800) is fixedly connected to the outer periphery of the plastic nut (600), and when the screw rod (500) rotates, the plastic nut (600) is driven to perform reciprocating linear motion on the screw rod (500); it is characterized in that: The inner wall or outer wall of the plastic nut (600) is provided with a circumferential ring groove (601) or a spiral groove (602). When the inner wall or outer wall of the plastic nut (600) is provided with a circumferential ring groove (601): The plastic nut (600) is a ring-segment plastic nut structure, which is composed of at least one or more circumferential ring grooves (601) formed on the inner wall or outer wall of the plastic nut (600). The circumferential ring groove (601) cuts the plastic nut (600) into segmented plastic nuts D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D210, D221, D23, D24, D25, D26, D … D n , wherein n≥2, and n is a positive integer, the groove widths C1, C2, ... C of each circumferential ring groove (601) are n All are greater than 0.05mm, The ring segment type plastic nut (D1, D2, … D n ) The length of each ring segment is between 5 and 50 mm, The bottom of the circumferential ring groove (601) is connected to the ring segment type plastic nut (D1, D2, … D n ) between the outer thread diameter H≤2.0mm, or the groove bottom of the circumferential ring groove (601) to the ring segment type plastic nut (D1, D2, … D n ) The remaining thickness of the wall between the major diameter of the internal thread is I≤2.0mm; The ring segment type plastic nut (D1, D2, … D n ) are simultaneously threadedly fixedly connected to the metal pipe (800), or the ring-segment plastic nut (D1, D2, … D n ) are fixedly connected with the pins and / or screws at one end of the metal tube (800), or the ring-type plastic nuts (D1, D2, … D n ) of the annular segments are fixedly connected to one end of the metal tube (800) by pins and / or screws, while the remaining annular segments are fixedly connected to one end of the metal tube (800) by threads; Alternatively, when the inner wall or outer wall of the plastic nut (600) is provided with a spiral groove (602): The plastic nut (600) is a spiral groove type plastic nut structure, wherein the spiral groove type plastic nut structure is a spiral groove type plastic nut consisting of at least one or more spiral grooves (602) formed on the inner wall surface or the outer wall surface of the plastic nut (600), wherein the distance from one groove end of the spiral groove (602) to an adjacent end face of the spiral groove type plastic nut is S1, and the distance from the other groove end to the adjacent end face of the spiral groove type plastic nut is S2, and S1≤50mm, S2≤50mm, The spiral groove (602) of the spiral groove type plastic nut has a winding angle greater than or equal to 360 degrees, and a groove width C of the spiral groove (602) is greater than 0.05 mm. The pitch S of the spiral groove (602) is between 5 and 50 mm. The remaining thickness H of the wall thickness between the groove bottom of the spiral groove (602) and the minor diameter of the external thread of the spiral groove type plastic nut is ≤ 2.0 mm, or the remaining thickness I of the wall thickness between the groove bottom of the spiral groove (602) and the major diameter of the internal thread of the spiral groove type plastic nut is ≤ 2.0 mm; The external thread of the spiral groove type plastic nut is fixedly connected to one end of the metal tube (800) by thread, or the spiral groove type plastic nut is fixedly connected to one end of the metal tube (800) by a pin and / or a screw, or a portion of the spiral groove type plastic nut is fixedly connected to one end of the metal tube (800) by a pin and / or a screw and the remaining portion is fixedly connected to one end of the metal tube (800) by thread.

2. The slotted push rod device using a plastic nut according to claim 1, characterized in that: The major diameter Φ2 of the external thread of the screw rod (500) is between 15 and 35 mm, and the major diameter Φ4 of the internal thread of the plastic nut (600) matched therewith is between 30 and 50 mm.

3. The slotted push rod device using a plastic nut according to claim 1, characterized in that: The invention also comprises a driving motor (100), wherein the driving motor (100) is fixedly connected to the lower housing (300), the driving shaft of the driving motor (100) is the input shaft (120) of the reduction gear box, the outer end surface of the motor end cover (110) of the driving motor (100) is provided with an integrally formed annular boss (111), the input shaft (120) of the driving motor (100) is provided with a cap (130), the shape of the center hole of the cap (130) is consistent with the cross-sectional shape of the corresponding matching part of the input shaft (120), the cap (130) is provided with a groove matching the annular boss (111) of the motor end cover (110), and the cap (130) and the annular boss (111) of the motor end cover (110) form a labyrinth oil-blocking structure.

4. The slotted push rod device using a plastic nut according to claim 1, characterized in that: The reduction gearbox body is provided with a housing mounting head (901) or a metal dustproof tube with a housing mounting head (901), and the other end of the metal tube (800) is provided with a tube wall connection hole or is fixedly connected to the metal tube mounting head (902).

5. The slotted push rod device using a plastic nut according to claim 1, characterized in that: The reduction gear box is fixedly connected to a housing mounting head (901), and the other end of the metal tube (800) is fixedly connected to a metal tube mounting head (902), and the metal tube mounting head (902) and the housing mounting head (901) are respectively located on both sides of the reduction gear box, and the transmission device (400) is a three-stage gear transmission mechanism or a one-stage worm gear transmission mechanism.

6. The slotted push rod device using a plastic nut according to claim 1, characterized in that: The helix angle Ψ of the internal thread of the plastic nut (600) is ≤2.90°, and the screw rod (500) has an external thread that matches the helix angle Ψ of the internal thread of the plastic nut (600).

7. A method for processing a slotted push rod device using a plastic nut according to any one of claims 1 to 6, characterized in that: The ring-segment plastic nut (D1, D2, … D n The processing steps for simultaneously and fixedly connecting the external threads of each annular segment of the metal tube (800) with one end of the metal tube (800) are as follows: Step 1: Forming the outer periphery of the plastic nut (600) blank into an external thread that matches the internal thread at one end of the metal tube (800); Step 2: at least one or more circumferential ring grooves (601) are formed on the outer wall of the plastic nut (600) blank, and the circumferential ring grooves (601) cut the plastic nut (600) into ring-segment plastic nuts (D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D19, D23, D24, D25, D26, D27, D28, D29 ... … D n ), the ring segment type plastic nut (D1, D2, … D n The length of each annular segment is between 5 and 50 mm, and the widths of the circumferential ring grooves (601) are C1, C2, ... C n are greater than 0.05 mm, and the distance from the bottom of the circumferential ring groove (601) to the ring segment type plastic nut (D1, D2, … D n ) The remaining thickness of the wall between the major diameter of the internal thread is I≤2.0mm; Step 3: Apply adhesive glue to the outer wall of the plastic nut (600) blank, wherein the adhesive glue adopts thread fastening glue, and rotate it into one end of the metal tube (800), so that the plastic nut (600) blank can reach the screw-on position set at one end of the metal tube (800) and be thread-fastened with one end of the metal tube (800); Step 4: After the glue solidifies, clamp the outer circle of the metal tube and process the plastic nut (600) blank into an internal thread that matches the external thread of the screw rod (500); the ring-type plastic nut (D1, D2, … D n The processing work of thread-fixed connection between the external threads of each annular segment of the metal tube (800) and one end of the metal tube (800) is completed.

8. A method for processing a slotted push rod device using a plastic nut according to any one of claims 1 to 6, characterized in that: The ring-segment plastic nut (D1, D2, … D n The processing steps for simultaneously and fixedly connecting the external threads of each annular segment of the metal tube (800) with one end of the metal tube (800) are as follows: Step 1: Forming the outer periphery of the plastic nut (600) blank into an external thread that matches the internal thread at one end of the metal tube (800); Step 2: Apply adhesive glue to the outer wall of the plastic nut (600) blank, wherein the adhesive glue adopts thread fastening glue, and rotate it into one end of the metal tube (800), so that the plastic nut (600) blank can reach the screw-on position set at one end of the metal tube (800) and be thread-fastened with one end of the metal tube (800); Step 3: After the glue solidifies, clamp the outer circle of the metal tube, process the internal threaded small diameter hole of the plastic nut (600) blank, and then open at least one or more circumferential ring grooves (601) on the inner wall surface of the internal threaded small diameter hole. The circumferential ring grooves (601) cut the plastic nut 600 into ring-type plastic nuts (D1, D2, D3) with at least two or more ring segments and their bases connected to each other. … D n ), the ring segment type plastic nut (D1, D2, … D n The length of each annular segment is between 5 and 50 mm, and the widths of the circumferential ring grooves (601) are C1, C2, ... C n are greater than 0.05 mm, and the distance from the bottom of the circumferential ring groove (601) to the ring segment type plastic nut (D1, D2, … D n ) The remaining thickness of the wall between the minor diameters of the external threads is H≤2.0mm; Step 4: Process the plastic nut (600) blank into an internal thread that matches the external thread of the screw rod (500), and the ring-segment plastic nut (D1, D2, … D n The processing work of thread-fixed connection between the external threads of each annular segment of the metal tube (800) and one end of the metal tube (800) is completed.

9. A method for processing a slotted push rod device using a plastic nut according to any one of claims 1 to 6, characterized in that: The processing steps for fixedly connecting the external thread of the spiral groove plastic nut of the spiral groove plastic nut structure in the slotted push rod device using a plastic nut with one end of the metal pipe (800) by thread are as follows: Step 1: Forming the outer periphery of the plastic nut (600) blank into an external thread that matches the internal thread at one end of the metal tube (800); Step 2: at least one or more spiral grooves (602) are formed on the outer wall surface of the plastic nut (600) blank, the distance from one groove end of the spiral groove (602) to an adjacent end face of the spiral groove type plastic nut is S1, the distance from the other groove end to the adjacent other end face of the spiral groove type plastic nut is S2, and S1≤50mm, S2≤50mm, the winding angle of the spiral groove (602) is greater than or equal to 360 degrees, the groove width C of the spiral groove (602) is greater than 0.05mm, the pitch S of the spiral groove (602) is between 5 and 50mm, and the remaining thickness I of the wall thickness between the groove bottom of the spiral groove (602) and the major diameter of the internal thread of the spiral groove type plastic nut is ≤2.0mm; Step 3: Apply adhesive glue to the outer wall of the plastic nut (600) blank, wherein the adhesive glue adopts thread fastening glue, and rotate it into one end of the metal tube (800), so that the plastic nut (600) blank can reach the screw-on position set at one end of the metal tube (800) and be thread-fastened with one end of the metal tube (800); Step 4: After the glue solidifies, clamp the outer circle of the metal tube and process the plastic nut (600) blank into an internal thread that matches the external thread of the screw rod (500); the processing work of fixing the external thread of the spiral groove plastic nut with the thread of one end of the metal tube (800) is completed.

10. A method for processing a slotted push rod device using a plastic nut according to any one of claims 1 to 6, characterized in that: The processing steps for fixedly connecting the external thread of the spiral groove plastic nut of the spiral groove plastic nut structure in the slotted push rod device using a plastic nut with one end of the metal pipe (800) by thread are as follows: Step 1: Forming the outer periphery of the plastic nut (600) blank into an external thread that matches the internal thread at one end of the metal tube (800); Step 2: Apply adhesive glue to the outer wall of the plastic nut (600) blank, wherein the adhesive glue adopts thread fastening glue, and rotate it into one end of the metal tube (800), so that the plastic nut (600) blank can reach the screw-on position set at one end of the metal tube (800) and be thread-fastened with one end of the metal tube (800); Step 3: After the glue solidifies, clamp the outer circle of the metal tube, process the internal threaded small diameter hole of the plastic nut (600) blank, and then open at least one or more spiral grooves (602) on the inner wall surface of the internal threaded small diameter hole, the distance from one groove end of the spiral groove (602) to an adjacent end face of the spiral groove type plastic nut is S1, and the distance from the other groove end to the adjacent other end face of the spiral groove type plastic nut is S2, and S1≤50mm, S2≤50mm, the winding angle of the spiral groove (602) is greater than or equal to 360 degrees, the groove width C of the spiral groove (602) is greater than 0.05mm, the pitch S of the spiral groove (602) is between 5 and 50mm, and the remaining thickness H of the wall thickness between the groove bottom of the spiral groove (602) and the external thread small diameter of the spiral groove type plastic nut is ≤2.0mm; Step 4: Processing the plastic nut (600) blank into an internal thread matching the external thread of the screw rod (500), and completing the processing of the external thread of the spiral groove plastic nut and the threaded fixed connection of one end of the metal tube (800).

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