Novel turn-back electric cylinder device

Abstract

The novel turn-back electric cylinder device comprises a cylinder body, a lead screw, a push rod, a turn-back seat, a pair of synchronous belt wheels, a synchronous belt and a motor, a front end cover and a bearing seat are arranged at the front end and the rear end of the cylinder body respectively, and the bearing seat serves as a rear end cover of the cylinder body and is matched with the front end cover to seal the internal environment of the cylinder body. The bearing seat and the motor are respectively installed at the upper end of the turn-back seat, and the rear end of the turn-back seat is installed and formed through a turn-back seat bottom cover. According to the turning-back electric cylinder device, the lead screw and the motor are switched through the turning-back seat, so that the turning-back electric cylinder device is formed. And fool-proof design is carried out on the upper end of the turn-back seat and the lower end of the bottom cover of the turn-back seat, so that the assembling efficiency of the turn-back electric cylinder device can be greatly improved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission, in particular to a novel return electric cylinder device. Background Art

[0002] The electric cylinder is a device that converts rotational motion into linear motion. Through the cooperation of the servo motor and the ball screw, the rotational motion of the servo motor is converted into linear motion through the ball screw.

[0003] Existing electric cylinder products have the following problems:

[0004] 1. The end cover at the front end of the cylinder body is usually sealed with only a copper sleeve. As the product (push rod) reciprocates for a long time, the sealing effect will deteriorate. Therefore, the copper sleeve needs to be replaced frequently to ensure the sealing effect inside the cylinder body, thereby ensuring the performance and accuracy of the electric cylinder.

[0005] 2. The bearing seat at the rear end of the cylinder body generally needs to be installed with multiple ball bearings, which are generally directly arranged and installed at the front and rear ends of the bearing seat. As the lead screw rotates in the ball bearing for a long time, the ball bearing will become loose, which will affect the performance and accuracy of the electric cylinder.

[0006] 3. In order to reduce weight, common electric cylinders generally use plastic materials. Although plastic materials can reduce weight, they have a short lifespan and poor stability. Utility Model Content

[0007] The technical problem solved by the utility model is to provide a novel direct-connected electric cylinder device with small volume, large transmission and good stability.

[0008] The technical solution adopted by the utility model to solve its technical problems is:

[0009] A novel reversing electric cylinder device comprises a cylinder body, a lead screw, a push rod, a reversing seat, a pair of synchronous pulleys, a synchronous belt and a motor. The front and rear ends of the cylinder body are respectively provided with a front end cover and a bearing seat. The bearing seat serves as the rear end cover of the cylinder body and cooperates with the front end cover to seal the internal environment of the cylinder body. The bearing seat and the motor are respectively mounted on the upper end of the reversing seat. The rear end of the reversing seat is mounted and formed through the bottom cover of the reversing seat.

[0010] The lead screw is connected to the push rod through a piston, and the piston serves as an intermediate piece between the lead screw and the push rod, which are spliced ​​and installed together. The lead screw includes a lead screw and a lead screw nut. The push rod is tubular and is installed and fixed at the front end of the piston and extends out of the front end cover. The push rod passes through the front end cover and sequentially passes through the copper sleeve and dust ring inside the front end cover to be in sealing contact with the front end cover. The lead screw nut is installed and fixed at the rear end of the piston. The front end of the lead screw passes through the lead screw nut and the piston and is arranged inside the tubular push rod; the rear end of the lead screw passes through the bearing seat and the return seat to the internal chamber of the return seat;

[0011] The outer surface of the piston is regularly provided with a plurality of annular notches, and wear-resistant rings are respectively installed thereon to form a plurality of wear-resistant rings; a plurality of guide key grooves are also regularly provided at the middle position of the outer surface along the length direction thereof, and guide keys are respectively installed thereon to form a plurality of guide keys; the piston contacts the inner wall of the cylinder body through the plurality of wear-resistant rings on the outer surface of the piston, and the plurality of guide keys on the outer surface of the piston cooperate with a plurality of guide grooves arranged on the inner wall of the cylinder body to limit and stabilize the transmission path of the piston;

[0012] A plurality of bearings are regularly arranged inside the bearing seat, the rear end of the screw rod passes through the plurality of bearings inside the bearing seat, and the screw rod rotates along the plurality of bearings;

[0013] The rear end of the lead screw and the rotating shaft of the motor are connected together through the pair of synchronous pulleys and the synchronous belt, and the pair of synchronous pulleys and the synchronous belt are arranged in the internal chambers of the folding seat and the bottom cover of the folding seat.

[0014] Furthermore, the front end cover is penetrated from top to bottom and is provided with a push rod extension hole for facilitating the extension of the push rod; the upper end of the push rod extension hole is provided with a dust ring installation groove, and a dust ring is installed in cooperation with it; the lower end of the push rod extension hole is provided with a copper sleeve installation groove, and a copper sleeve is installed in cooperation with it; the push rod extends out of the front end cover from the push rod extension hole and contacts with the inner wall, and the push rod passes through the copper sleeve and the dust ring in turn and contacts with them in a sealing manner.

[0015] Furthermore, weight-reducing grooves with upper openings are regularly arranged on the front, rear, left and right four surfaces of the front end cover. The weight-reducing grooves with upper openings are recessed inward along the middle parts of the front, rear, left and right four surfaces of the front end cover and are designed along the upper opening of the front end cover.

[0016] Furthermore, a plurality of positioning notches are regularly arranged at the lower ends of the front and rear faces or left and right faces of the front cover at the slot positions on the front and rear faces or left and right faces of the cylinder body to achieve rapid positioning and assembly of the front cover and the cylinder body.

[0017] Furthermore, stepped bolt mounting holes are regularly arranged at the four corners of the front end cover, and the bolts pass through the stepped bolt mounting holes and are locked with the threaded holes at the upper end of the cylinder body to fix the front end cover to the upper end of the cylinder body.

[0018] Furthermore, the upper end of the folding seat is divided into two parts along its length direction, forming a bearing seat mounting end for mounting and fixing the bearing seat and a motor mounting end for mounting and fixing the motor respectively; an upwardly protruding bearing seat mounting boss is regularly arranged at the bearing seat mounting end, and a bearing seat positioning hole for convenient insertion of the lower end of the bearing seat is regularly opened in the middle area of ​​the bearing seat mounting boss, and the bearing seat positioning hole passes through the folding seat to the inner cavity of the folding seat; the motor mounting end is a plane area, forming a motor mounting platform, and a motor positioning hole for the lower end of the motor is regularly opened in the middle area of ​​the motor mounting platform, and the motor positioning hole passes through the folding seat to the inner cavity of the folding seat; bearing seat fixing holes for convenient bolts to pass through are regularly arranged at the four corners of the bearing seat mounting boss, and motor fixing waist holes for convenient bolts to pass through are regularly arranged at the four corners of the motor mounting platform along the length direction of the folding seat.

[0019] Furthermore, a bearing seat end positioning boss is regularly arranged at the bearing seat mounting end of the lower end of the folding seat bottom cover, and a motor end positioning boss is regularly arranged at the motor mounting end of the lower end of the folding seat bottom cover; the bearing seat positioning boss and the motor end positioning boss are arranged in different shapes.

[0020] Furthermore, the bearing seat is provided with a screw rod extension hole from top to bottom, and a bearing mounting groove is regularly provided at the upper end of the screw rod extension hole, the aperture of the bearing mounting groove is larger than the aperture of the screw rod extension hole, and the plurality of bearings are installed in the bearing mounting groove; the upper end of the bearing mounting groove is regularly provided with a bearing seat end cover mounting groove, and a bearing seat end cover is installed, and the upper and lower ends of the bearing seat end cover are respectively provided with an upper boss and a lower boss, the upper boss of the bearing seat end cover is snapped into the lower end of the cylinder body and fits and seals with the inner wall of the lower end of the cylinder body, the lower boss of the bearing seat end cover is snapped into the bearing mounting groove and fits and seals with the inner wall of the bearing mounting groove, and the lower boss of the bearing seat end cover presses the plurality of bearings in the bearing mounting groove.

[0021] Furthermore, a lower boss of the bearing seat is also provided at the lower end of the bearing seat, and the lower boss of the bearing seat is inserted into the folding seat.

[0022] Furthermore, a transfer rod is provided at the front end of the push rod, and the rear end of the transfer rod is sealingly connected to the front end of the push rod to seal the front end of the screw rod inside the push rod.

[0023] The beneficial effects of the utility model are:

[0024] 1. The utility model transfers the lead screw and the motor through the folding seat to form a folding electric cylinder device. And by making a fool-proof design on the upper end of the folding seat and the lower end of the folding seat bottom cover, the assembly efficiency of the folding electric cylinder device of the utility model can be greatly improved to improve production efficiency.

[0025] 2. The utility model can greatly improve the service life of the entire product by arranging a plurality of wear-resistant rings and guide keys on the piston, thereby ensuring the stability, performance and precision of the product during long-term use.

[0026] 3. The utility model can improve the stability of the bearing rotation by encapsulating a plurality of bearings inside the bearing seat and pressing and fixing them by the bearing seat end cover at the upper end, thereby improving the stability of the screw rod rotation in the bearing.

[0027] 4. The utility model adopts a metal front end cover, and an upper boss is arranged on the upper end of the metal front end cover, and weight-reducing grooves are arranged on the front, back, left and right four surfaces of the metal front end cover, thereby effectively reducing the volume and weight of the metal front end cover without destroying the strength of the metal front end cover, and thus reducing the overall weight of the product.

[0028] 5. The utility model provides a dustproof ring and a copper sleeve at the upper and lower ends of the front end cover, respectively. The copper sleeve adopts a long copper sleeve, which can effectively prevent dust in the external environment from entering the cylinder body and effectively prevent the oil body inside the cylinder body from leaking out. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of the utility model;

[0030] Figure 2 for Figure 1 Structural diagram of the internal components;

[0031] Figure 3 for Figure 2 The structural diagram of the middle piston 5;

[0032] Figure 4 for Figure 1 A structural diagram of the middle and front end cover 12;

[0033] Figure 5 for Figure 4 The three-dimensional structure diagram of

[0034] Figure 6 for Figure 1 The structural diagram of the middle folding seat 14;

[0035] Figure 7 for Figure 6The structural diagram from the bottom perspective;

[0036] Figure 8 for Figure 1 Structural diagram of the middle cylinder body 11 and the bearing seat 13;

[0037] The markings in the figure are:

[0038] 11. Cylinder body, 12. Front end cover, 13. Bearing seat, 14. Folding seat, 15. Folding seat bottom cover;

[0039] 21. Synchronous pulley, 22. Synchronous belt, 3. Bearing, 4. Screw, 41. Screw, 42. Screw nut, 43. Limit nut, 44. Lock nut, 5. Piston, 6. Push rod, 7. Adapter rod, 8. Dust ring, 9. Copper sleeve, 51. Wear-resistant ring, 52. Guide key;

[0040] 121, push rod extension hole, 122, dust ring installation groove, 123, copper sleeve installation groove, 1201, upper boss, 1202, lower boss, 1203, bolt installation hole, 1204, bolt installation foot, 1205, weight reduction groove, 1206, positioning notch;

[0041] 131, bearing seat end cover, 1301, screw rod extension hole, 1302, bearing mounting groove, 1303, bearing seat end cover mounting groove;

[0042] 1401, bearing seat mounting boss, 1402, bearing seat fixing hole, 1403, bearing seat positioning hole, 1404, motor mounting platform, 1405, motor positioning hole, 1406, motor fixing waist hole;

[0043] 1501, bearing seat end positioning boss, 1502, groove, 1503, motor end positioning boss. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0046] like Figure 1 As shown, the utility model provides a novel folding electric cylinder device, including a cylinder body 11, and the front and rear ends of the cylinder body 11 are respectively provided with a front cover 12 and a bearing seat 13, and the bearing seat 13 serves as the rear end cover of the cylinder body. The rear end of the bearing seat 13 is connected to a motor (omitted in the figure) through a folding seat 14, and the rear end of the folding seat 14 is installed and formed through a folding seat bottom cover 15.

[0047] Furthermore, the cylinder body 11 is regularly provided with a lead screw 4, a piston 5 and a push rod 6. The piston 5 is used as an intermediate piece between the lead screw 4 and the push rod 6, which are spliced ​​and installed together. The push rod 6 is fixed to the front end of the piston 5 and extends out of the front end cover 12. The lead screw 4 includes a lead screw 41 and a lead screw nut 42, the lead screw nut 42 is fixed to the rear end of the piston 5, the lead screw 41 passes through the lead screw nut 42, and is rotatably connected to the lead screw nut 42 through a plurality of balls.

[0048] Furthermore, the push rod 6 is a tubular push rod with a hollow interior. The front end of the screw rod 41 passes through the piston 5 and is disposed inside the push rod 6; the rear end of the screw rod 41 passes through a plurality of bearings 3 on the bearing seat 13 and is connected to the rotating shaft of the motor through a pair of synchronous pulleys 21 and a synchronous belt 22.

[0049] Furthermore, a transfer rod 7 is provided at the front end of the push rod 6 . The transfer rod 7 serves as a transfer rod of the push rod on one hand, and seals the front end of the push rod 6 on the other hand, thereby sealing the front end of the screw rod 41 inside the push rod 6 .

[0050] The working principle or process of a novel reversing electric cylinder device of the utility model is as follows:

[0051] The motor drives the screw 41 to rotate through a pair of synchronous pulleys 21 and a synchronous belt 22. The screw nut 42 on the screw 41 converts the rotational motion of the screw into linear motion, thereby driving the piston 5 to perform linear motion along the inner wall of the cylinder body 11. Further, the piston 5 drives the push rod 6 at its front end to perform linear motion.

[0052] like Figure 2 and Figure 3As shown, the outer surface of the piston 5 is regularly provided with a plurality of annular notches, and wear-resistant rings 51 are respectively installed thereon, forming a plurality of wear-resistant rings. The middle position of the outer surface of the piston 5 is also regularly provided with a plurality of guide key grooves along its length direction, and guide keys 52 are respectively installed thereon, forming a plurality of guide keys.

[0053] The piston 5 contacts the inner wall of the cylinder 11 through a plurality of wear-resistant rings 51 on its outer surface. By providing a plurality of wear-resistant rings in contact with the inner wall of the cylinder 11, the service life and stability of the product can be effectively improved.

[0054] Among them, the piston 5 cooperates with a number of guide grooves arranged on the inner wall of the cylinder body 11 through a number of guide keys on its outer surface. The guide keys on the piston are installed in the guide grooves on the inner wall of the cylinder body, thereby limiting the transmission direction of the piston, avoiding the position or angle deviation of the piston, and further improving the stability of the piston's linear motion inside the cylinder body 11.

[0055] like Figure 3 As shown, in one embodiment, the plurality of wear-resistant rings 51 on the outer surface of the piston 5 are provided in three groups, which are respectively provided at the upper, middle and lower positions of the outer surface of the piston, thereby forming a first wear-resistant ring 5101, a second wear-resistant ring 5102 and a third wear-resistant ring 5103. The provision of three groups of wear-resistant rings can greatly improve the service life of the entire product, thereby ensuring the stability, performance and precision of the product.

[0056] like Figure 3 As shown, in one embodiment, the plurality of guide keys on the outer surface of the piston 5 are provided in two groups, along the length of the piston ( Figure 3 The two sets of guide keys are arranged front and back in the height direction. The arrangement of the two sets of guide keys can ensure the stability of the piston in the transmission inside the cylinder body 11.

[0057] like Figure 4 and Figure 5 , which is a structural diagram of the front end cover 12.

[0058] like Figure 4 As shown, the front end cover 12 is provided with a push rod extension hole 121 through the top and bottom for convenient extension of the push rod 6. Further, the upper end of the push rod extension hole 121 is provided with a dust ring installation groove 122, and the dust ring 8 is installed in cooperation, and the lower end of the push rod extension hole 121 is provided with a copper sleeve installation groove 123, and the copper sleeve 9 is installed in cooperation. The push rod 6 extends out of the front end cover from the push rod extension hole 121, passes through the copper sleeve 9 in the copper sleeve installation groove and the dust ring 8 in the dust ring installation groove in sequence, and is in sealing contact with them.

[0059] Among them, the dust ring 8 at the front end of the front cover 12 can effectively prevent the dust in the external environment from being adsorbed on the push rod during the reciprocating linear motion of the push rod, and being brought into the cylinder body by the push rod, polluting the internal environment of the cylinder body, and causing the performance of the product to be weakened. The copper sleeve 9 at the rear end of the front cover 12 can effectively prevent the oil body inside the cylinder body from leaking out during the reciprocating linear motion of the push rod, causing the performance of the product to be weakened, and causing pollution problems to the external environment. Therefore, the dust ring 8 and copper sleeve 9 respectively set at the front and rear ends of the front cover can effectively prevent dust in the external environment from entering the cylinder body, and can also effectively prevent the oil body inside the cylinder body from leaking out.

[0060] Further, such as Figure 4 As shown, the upper and lower ends of the end cover 12 are respectively raised to form an upper boss 1201 and a lower boss 1202. The upper boss 1201 is mainly used for the setting of the dust ring mounting groove 122 and weight reduction treatment. The natural protrusion of the upper boss can effectively reduce the weight and volume of the front end cover 12. The lower boss 1202 is used to be inserted into the upper end of the cylinder body 11 and fit and seal with the inner wall of the upper end of the cylinder body.

[0061] Further, such as Figure 5 As shown, the front end cover 12 is regularly provided with first bolt mounting holes 1203 at the four corners thereof, and the first bolt mounting holes 1203 are bolt mounting holes with steps. Correspondingly, the upper four corners of the cylinder body 11 are provided with threaded holes that cooperate with the first bolt mounting holes 1203.

[0062] Furthermore, in order to further reduce the weight of the front end cover 12 while ensuring the overall structural strength of the front end cover, a weight reduction groove 1205 with a concave center and an open top is regularly provided on the front, rear, left, and right four surfaces of the front end cover 12. The weight reduction groove 1205 is naturally concave along the middle part of the front, rear, left, and right four surfaces of the front end cover, and is designed to be open along the top end of the front end cover, thereby forming a Figure 5 The weight-reducing groove 1205 is shown to be open at the upper end.

[0063] Furthermore, the weight-reducing groove 1205 is designed to avoid the first bolt mounting hole 1203 , so that a first bolt mounting foot 1204 in a cylindrical shape is naturally formed at the four corners of the front end cover 12 .

[0064] In order to ensure the service life and stability of the electric cylinder device in the utility model, the front end cover 12 is made of metal. Although the metal material can improve its service life and stability, it is relatively heavy. Figure 5 As shown, the utility model can effectively reduce the weight of the front end cover and thus reduce the overall weight of the electric cylinder through the design of the upper boss 1201 and the weight reduction grooves 1205 on the front, back, left and right sides.

[0065] Furthermore, the lower ends of the front cover 12 are respectively foolproofed at the front and rear and left and right sides. The front and rear sides of the front cover 12 are regularly provided with a plurality of positioning notches 1206 at the slot positions of the front and rear sides of the cylinder body 11, so as to distinguish the left and right sides thereof, which is convenient for the early assembly work on the one hand, and integrally formed with the cylinder body after being spliced ​​on the other hand, reducing the abruptness and making it more beautiful.

[0066] like Figure 6 and Figure 7 , which is a structural diagram of the folding seat 14 and the folding seat bottom cover 15 .

[0067] like Figure 6 As shown, the upper end of the folding seat 14 is divided into two parts, which are used to install and fix the bearing seat 13 and the motor respectively, forming a bearing seat installation area on the left and a motor installation area on the right.

[0068] Furthermore, the bearing seat installation area on the left side of the folding seat is regularly provided with a bearing seat installation boss 1401 protruding upward, and the middle position of the bearing seat installation boss 1401 is regularly provided with a bearing seat positioning hole 1403, and the bearing seat positioning hole 1403 penetrates the folding seat 14. The four corners of the bearing seat installation boss 1401 are regularly provided with bearing seat fixing holes 1402, and bolts are sequentially passed through the bearing seat fixing holes 1402 and the threaded holes of the bearing seat 13 and the lower end of the cylinder body 11 from the bottom of the bearing seat installation boss, and the bearing seat 13 is fixed to the upper end of the bearing seat installation boss 1401, thereby fixing the folding seat 14 and the bearing seat 13 to the lower end of the cylinder body 11.

[0069] Further, the motor installation area on the right side of the folding seat is a flat area, forming a motor installation platform 1404, and the middle position of the motor installation platform 1404 is regularly provided with a motor positioning hole 1405. The four corners of the motor installation platform 1404 are along the length direction of the folding seat (i.e. Figure 6 The motor fixing waist hole 1406 is regularly arranged in the left and right directions in the motor mounting platform. The bolts pass through the motor fixing waist hole 1406 and the through holes at the four corners of the motor from the bottom of the motor mounting platform, and the motor is locked and fixed to the upper end of the motor mounting platform 1404 with the help of nuts.

[0070] Among them, the bearing seat mounting boss 1401 protrudes upward, and the motor mounting platform 1404 adopts a flat design, thus forming a fool-proof design to avoid installation errors of the bearing seat and the motor, and greatly improving the assembly efficiency of the reciprocating electric cylinder device of the utility model.

[0071] The bearing seat positioning hole 1403 cooperates with the boss at the lower end of the bearing seat 13, and the boss at the lower end of the bearing seat 13 is inserted into the bearing seat positioning hole 1403, thereby realizing the rapid positioning and assembly of the bearing seat 13. The motor positioning hole 1406 is to cooperate with the boss at the lower end of the motor, so that the motor can be quickly inserted into the motor positioning hole, thereby realizing the rapid positioning and assembly of the motor.

[0072] Among them, the motor fixing waist hole 1406 adopts a strip waist hole, which can easily adjust the distance between the motor and the cylinder body 11, thereby facilitating the adjustment of the tightness between the synchronous belts.

[0073] Furthermore, the rear end of the screw rod 41 and the rotating shaft of the motor respectively pass through the bearing seat mounting boss 1401 and the motor mounting platform 1404 to the inner cavity between the return seat 14 and the return seat bottom cover 15, and are respectively installed and fixed with a synchronous pulley 21, thereby forming a pair of synchronous pulleys, and the pair of synchronous pulleys 21 are connected together by a synchronous belt 22.

[0074] like Figure 7 As shown, the folding seat bottom cover 15 is used to cover the lower end of the folding seat 14, so as to seal a pair of synchronous pulleys and synchronous belts in the internal chamber between the folding seat and the folding seat bottom cover. At the same time, in order to facilitate the assembly of the folding seat bottom cover 15, the lower end surface of the folding seat bottom cover 15 is designed to prevent fooling, and a bearing seat end positioning boss 1501 is arranged at the lower end of the folding seat bottom cover in the bearing seat installation area on the left side of the upper end of the folding seat; and a motor end positioning boss 1503 is regularly arranged at the lower end of the folding seat bottom cover in the motor installation area on the right side of the upper end of the folding seat.

[0075] The bearing seat end positioning boss 1501 is a rectangular boss, and the middle is sunken to form a groove 1502, the bottom surface of the groove is flush with the bottom surface of the folding seat bottom cover. The motor end positioning boss 1502 is a circular boss. By setting bosses of different shapes on the lower end surface of the folding seat bottom cover 15, the direction of the folding seat bottom cover can be quickly distinguished, and the efficiency of assembling the folding seat bottom cover 15 to the lower end of the folding seat 14 can be improved, thereby improving the overall assembly efficiency of the electric cylinder device.

[0076] like Figure 8 , which is a structural diagram of the bearing seat 13. In the present invention, the bearing seat 13 is through-set from top to bottom to form a screw rod extension hole 1301. Furthermore, a bearing installation groove 1302 is regularly set at the upper end of the screw rod extension hole 1301, and the aperture of the bearing installation groove 1302 is larger than the aperture of the screw rod extension hole 1301, so that a plurality of ball bearings can be placed and installed in the bearing installation groove 1302.

[0077] Further, such as Figure 8As shown, in the present invention, a plurality of ball bearings are installed in the bearing mounting groove 1302 inside the bearing seat 13, and the plurality of ball bearings are pressed by the bearing seat end cover 131, and the upper end of the bearing seat 13 is covered, thereby fixing the plurality of ball bearings inside the bearing seat 13.

[0078] Therefore, further, a bearing seat end cover mounting groove 1303 is regularly arranged at the upper end of the bearing seat 13 , and the aperture of the bearing seat end cover mounting groove 1303 is larger than the aperture of the bearing mounting groove 1302 .

[0079] like Figure 8 As shown, the upper and lower ends of the bearing seat end cover 131 are also respectively provided with an upper boss and a lower boss, wherein the upper boss is inserted into the lower end of the cylinder body 11 and is sealed against the inner wall of the lower end of the cylinder body; the lower boss is inserted into the bearing mounting groove 1302 to compress a plurality of ball bearings in the bearing mounting groove and is sealed against the inner wall of the bearing mounting groove 1302.

[0080] Furthermore, the lower end of the bearing seat 13 is also provided with a bearing seat lower boss, such as Figure 6 and Figure 8 As shown, the lower boss of the bearing seat is inserted into the bearing seat positioning hole 1403, so that it can be quickly assembled to the return seat 14.

[0081] like Figure 2 As shown, in order to limit the forward push stroke of the lead screw nut or push rod, the front end of the lead screw is provided with a limit nut 43. In order to lock the lead screw and the bearing, a locking nut 44 is also provided at the rear end of the lead screw and the bearing connection.

[0082] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of return electric cylinder device, including a cylinder body, a lead screw, a push rod, a return seat, a pair of synchronous pulleys, a synchronous belt and a motor, characterized in that: The front and rear ends of the cylinder body are respectively provided with a front end cover and a bearing seat, the bearing seat serves as the rear end cover of the cylinder body and cooperates with the front end cover to seal the internal environment of the cylinder body, the bearing seat and the motor are respectively mounted on the upper end of the folding seat, and the rear end of the folding seat is formed by the folding seat bottom cover; The lead screw is connected to the push rod through a piston, and the piston serves as an intermediate piece between the lead screw and the push rod, which are spliced ​​and installed together. The lead screw includes a lead screw and a lead screw nut. The push rod is tubular and is installed and fixed at the front end of the piston and extends out of the front end cover. The push rod passes through the front end cover and sequentially passes through the copper sleeve and dust ring inside the front end cover to be in sealing contact with the front end cover. The lead screw nut is installed and fixed at the rear end of the piston. The front end of the lead screw passes through the lead screw nut and the piston and is arranged inside the tubular push rod; the rear end of the lead screw passes through the bearing seat and the return seat to the internal chamber of the return seat; The outer surface of the piston is regularly provided with a plurality of annular notches, and wear-resistant rings are respectively installed thereon to form a plurality of wear-resistant rings; a plurality of guide key grooves are also regularly provided at the middle position of the outer surface along the length direction thereof, and guide keys are respectively installed thereon to form a plurality of guide keys; the piston contacts the inner wall of the cylinder body through the plurality of wear-resistant rings on the outer surface of the piston, and the plurality of guide keys on the outer surface of the piston cooperate with a plurality of guide grooves arranged on the inner wall of the cylinder body to limit and stabilize the transmission path of the piston; A plurality of bearings are regularly arranged inside the bearing seat, the rear end of the screw rod passes through the plurality of bearings inside the bearing seat, and the screw rod rotates along the plurality of bearings; The rear end of the lead screw and the rotating shaft of the motor are connected together through the pair of synchronous pulleys and the synchronous belt, and the pair of synchronous pulleys and the synchronous belt are arranged in the internal chambers of the folding seat and the bottom cover of the folding seat.

2. A novel reversing electric cylinder device as claimed in claim 1, characterized in that: The front end cover is penetrated from top to bottom and is provided with a push rod extension hole for facilitating the extension of the push rod. The upper end of the push rod extension hole is provided with a dust ring installation groove, and a dust ring is installed in cooperation with it. The lower end of the push rod extension hole is provided with a copper sleeve installation groove, and a copper sleeve is installed in cooperation with it. The push rod extends out of the front end cover from the push rod extension hole and contacts with the inner wall. The push rod passes through the copper sleeve and the dust ring in turn and contacts with them in a sealing manner.

3. A novel reversing electric cylinder device as claimed in claim 2, characterized in that: The front end cover has four surfaces, front, back, left, and right, regularly provided with weight-reducing grooves with upper openings. The weight-reducing grooves with upper openings are recessed inwardly along the middle parts of the front end cover and are designed along the upper opening of the front end cover.

4. A novel reversing electric cylinder device as claimed in claim 3, characterized in that: A plurality of positioning notches are regularly arranged at the lower ends of the front and rear surfaces or left and right surfaces of the front cover at the slot positions on the front and rear surfaces or left and right surfaces of the cylinder body to achieve rapid positioning and assembly of the front cover and the cylinder body.

5. A novel reversing electric cylinder device as claimed in claim 2, characterized in that: Bolt mounting holes with steps are regularly arranged at the four corners of the front end cover. The bolts pass through the bolt mounting holes with steps and are locked with the threaded holes at the upper end of the cylinder body to fix the front end cover to the upper end of the cylinder body.

6. A novel reversing electric cylinder device as claimed in claim 1, characterized in that: The upper end of the folding seat is divided into two parts along its length direction, forming a bearing seat mounting end for mounting and fixing the bearing seat and a motor mounting end for mounting and fixing the motor respectively; an upwardly protruding bearing seat mounting boss is regularly arranged at the bearing seat mounting end, and a bearing seat positioning hole is regularly opened in the middle area of ​​the bearing seat mounting boss for convenient insertion of the lower end of the bearing seat, and the bearing seat positioning hole passes through the folding seat to the inner cavity of the folding seat; the motor mounting end is a plane area, forming a motor mounting platform, and a motor positioning hole is regularly opened in the middle area of ​​the motor mounting platform for the lower end of the motor to be inserted, and the motor positioning hole passes through the folding seat to the inner cavity of the folding seat; bearing seat fixing holes for convenient bolts to pass through are regularly arranged at the four corners of the bearing seat mounting boss, and motor fixing waist holes for convenient bolts to pass through are regularly arranged at the four corners of the motor mounting platform along the length direction of the folding seat.

7. A novel reversing electric cylinder device as claimed in claim 6, characterized in that: The lower end of the folding seat bottom cover is regularly provided with a bearing seat end positioning boss at the bearing seat mounting end, and the lower end of the folding seat bottom cover is regularly provided with a motor end positioning boss at the motor mounting end; the bearing seat positioning boss and the motor end positioning boss are provided in different shapes.

8. A novel reversing electric cylinder device as claimed in claim 1, characterized in that: The bearing seat is provided with a screw rod extension hole through the upper and lower parts, and a bearing installation groove is regularly provided at the upper end of the screw rod extension hole, the aperture of the bearing installation groove is larger than the aperture of the screw rod extension hole, and the plurality of bearings are installed in the bearing installation groove; the upper end of the bearing installation groove is regularly provided with a bearing seat end cover installation groove, and a bearing seat end cover is installed, and the upper and lower ends of the bearing seat end cover are respectively provided with an upper boss and a lower boss, the upper boss of the bearing seat end cover is snapped into the lower end of the cylinder body and fits and seals with the inner wall of the lower end of the cylinder body, the lower boss of the bearing seat end cover is snapped into the bearing installation groove and fits and seals with the inner wall of the bearing installation groove, and the lower boss of the bearing seat end cover presses the plurality of bearings in the bearing installation groove.

9. A novel reversing electric cylinder device as claimed in claim 8, characterized in that: The lower end of the bearing seat is also provided with a lower boss of the bearing seat, and the lower boss of the bearing seat is snapped into the folding seat.

10. A novel reversing electric cylinder device as claimed in claim 1, characterized in that: A transfer rod is provided at the front end of the push rod, and the rear end of the transfer rod is sealed and connected with the front end of the push rod, so as to seal the front end of the screw rod inside the push rod.

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