Novel flange-free turn-back electric cylinder device

Abstract

The utility model relates to a novel flange-free turn-back electric cylinder device, which comprises a cylinder body, a ball screw with a flange-free structure, a turn-back seat and a motor, the ball screw with the flange-free structure is arranged in the cylinder body and comprises a flange-free nut and a ball screw, and the turn-back seat is arranged on the ball screw. The front end cover and the rear end cover are respectively arranged at the front end and the rear end of the cylinder body and are sealed with the cylinder body, and the flange-free nut is sealed in the cylinder body by the front end cover and the rear end cover; the cylinder body is fixed on one side of the upper end of the turn-back seat through the rear end cover, and the motor is fixed on the other side of the upper end of the turn-back seat. According to the novel flange-free turn-back electric cylinder device, the nut of the ball screw is redesigned, the flange structure of the nut is removed, and the nut of the ball screw is combined with the piston of the electric cylinder, so that the novel flange-free turn-back electric cylinder device can be better matched with the cylinder body of the electric cylinder, and the ball screw with larger diameter can be assembled under the same specification. Therefore, under the same space requirement, larger thrust can be output.

Description

Technical Field

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

[0002] The electric cylinder device currently on the market generally has a ball screw with a flange structure and a piston with a push rod installed in the cylinder body. The push rod is installed at the front end of the piston, and then the piston is sleeved on the nut of the ball screw. The ball screw nut drives the piston to drive in the electric cylinder body.

[0003] However, the screw nuts of existing standard ball screws are generally designed with a raised flange structure (such as Figure 5 As shown in the figure, there are strict requirements for its application scenarios. Because the nut of the existing ball screw has a flange structure, when it is assembled into an electric cylinder or a slide, there are strict requirements for the space inside the electric cylinder. The internal space must be larger than the diameter of the flange, otherwise, the ball screw with the flange will not be able to be assembled into the interior of the electric cylinder.

[0004] However, in some application scenarios of electric cylinders, there are strict requirements on the size of the electric cylinder. If the size of the electric cylinder is reduced, the ball screw and its nut structure inside it also need to be reduced. After the reduction, the pressure that the ball screw and nut structure can withstand will also be reduced accordingly. Therefore, it will not be able to meet the production requirements.

[0005] Moreover, when the lead screw composed of a nut with a flange structure is used, it needs to be matched with a piston adapter push rod. Therefore, when it is produced and processed, more parts are required and the assembly process is also more complicated. Utility Model Content

[0006] The technical problem solved by the utility model is to provide a novel flangeless return electric cylinder device with small volume and large transmission.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A novel flangeless reversing electric cylinder device comprises a cylinder body, a ball screw with a flangeless structure, a reversing seat and a motor, wherein the ball screw with a flangeless structure is installed in the cylinder body, and the ball screw with a flangeless structure comprises a flangeless nut and a ball screw, wherein the flangeless nut is designed as a cylinder, and one or more annular notches are regularly arranged on its outer surface, and a wear-resistant ring is installed thereon, and one or more key grooves are also regularly arranged on its outer surface along its length direction, and a guide key is installed thereon, threaded holes are arranged at the front and rear ends of the flangeless nut, and push rods and magnetic rings are installed thereon respectively, a spiral hole is arranged at the middle part, and the ball screw is installed thereon through a plurality of balls, the spiral hole connects the threaded holes at the front and rear ends of the flangeless nut, and is designed concentrically therewith, the push rod covers the front end of the ball screw, and the rear end of the ball screw extends through the magnetic ring The rear end of the ring; the front and rear ends of the cylinder body are respectively equipped with a front end cover and a rear end cover, and are sealed with them, the front end cover and the rear end cover seal the flangeless nut for transmission in the cylinder body, the flangeless nut contacts the inner wall of the cylinder body through the wear-resistant ring on its outer surface, and the push rod passes through the front end cover to extend the transfer rod; the cylinder body is fixed to one side of the upper end of the return seat through the rear end cover, and the motor is fixed to the other side of the upper end of the return seat, the rear end of the ball screw and the rotating shaft of the motor respectively pass through the return seat, and are both equipped with synchronous pulleys, and the rear end of the ball screw and the synchronous pulley on the rotating shaft of the motor are connected and transmitted through a synchronous belt; a plurality of ball bearings are also arranged between the ball screw of the flangeless structure and the rear end cover, and the ball screw is rotatably arranged in the rear end cover through the plurality of ball bearings.

[0009] Furthermore, a folding seat cover is provided at the lower end of the folding seat, and the folding seat cover covers the lower end of the folding seat, and the synchronous pulley and the synchronous belt are sealed in the folding seat and the folding seat cover by fasteners.

[0010] Furthermore, a dust ring is provided between the push rod and the front end cover.

[0011] Furthermore, the annular notches are provided in two groups, which are respectively provided at the left and right ends of the flangeless nut.

[0012] Furthermore, the keyways are provided in two groups and are symmetrically arranged, respectively arranged on the upper and lower sides or the left and right sides of the flangeless nut.

[0013] Furthermore, the ball bearings are mounted at the front and rear ends of the rear end cover.

[0014] Furthermore, a limiting nut is provided at the front end of the ball screw, and the diameter of the limiting nut is larger than the diameter of the spiral hole and smaller than the inner diameter of the push rod, so that the forward push stroke of the flangeless nut is limited by the limiting nut.

[0015] Furthermore, the outer diameter of the magnetic ring is the same as the outer diameter of the flangeless nut, and an annular slot is also provided on its outer surface and a wear-resistant ring is installed.

[0016] Furthermore, the rear end cover is provided with an oil filling hole and an oil filling nozzle seal.

[0017] The beneficial effects of the utility model are:

[0018] 1. The utility model is a new type of flangeless folding electric cylinder device. By redesigning the nut of the ball screw, removing the flange structure of the nut, and combining the screw nut with the piston of the electric cylinder, it can better cooperate with the cylinder body of the electric cylinder, and the diameter requirement of the ball screw will also be reduced. Under the same specifications, a ball screw with a larger diameter can be assembled. Therefore, under the same space requirements, when the ball screw composed of the flangeless structure is assembled and applied to the electric cylinder or slide, it can output a greater thrust.

[0019] 2. The utility model is a new type of flangeless return electric cylinder device. Because the nut body has no flange structure, and a threaded hole for installing a push rod is set at the front end of the nut, the existing independent components of the lead screw nut and the piston are combined, and the transmission function of the lead screw and the pushing function of the push rod can be realized without adding a piston component. Therefore, the processing cost is lower and the composition efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a side view of the electric cylinder device of the utility model;

[0021] Figure 2 for Figure 1 Sectional view in the AA direction;

[0022] Figure 3 for Figure 1 Structural diagram of the ball screw without flange structure;

[0023] Figure 4 for Figure 3 Sectional view in the middle BB direction;

[0024] Figure 5 for Figure 3 Structural diagram of the flangeless nut;

[0025] Figure 6 for Figure 5 Sectional view in CC direction;

[0026] Figure 7 It is a structural diagram of an existing ball screw nut in the background technology of the utility model;

[0027] Figure 8 for Figure 7 Sectional view in the middle DD direction;

[0028] The markings in the figure are:

[0029] 1. Flangeless nut, 2. Ball screw, 3. Magnetic ring, 4. Push rod, 5. Adapter rod, 6. Ball bearing, 7. Lock nut, 8. Coupling, 10. Motor;

[0030] 91. cylinder body, 92. front end cover, 93. rear end cover, 94. folding seat, 95. folding seat cover plate, 96. dust ring;

[0031] 12. Wear-resistant ring, 13. Guide key, 21. Limit nut;

[0032] 11. nut body, 1101. first annular notch, 1102. second annular notch, 1103. first keyway, 1104. second keyway, 1105. first threaded hole, 1106. second threaded hole, 1107. spiral hole;

[0033] 1001, synchronous pulley, 1002, synchronous belt;

[0034] 101. Flange structure. 102. Second spiral hole. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] like Figure 1-Figure 6As shown, the utility model provides a novel flangeless reversing electric cylinder device, including a cylinder body 91 and a ball screw with a flangeless structure, wherein the ball screw with a flangeless structure is installed in the cylinder body 91 .

[0038] Among them, as shown in Figure - Figure 4 As shown, the ball screw with a flangeless structure includes a flangeless nut 1 and a ball screw 2. The flangeless nut 1 is designed as a cylinder, and one or more annular notches are regularly arranged on its outer surface, and a wear-resistant ring 12 is installed. One or more keyways are also regularly arranged on its outer surface along its length direction, and a guide key 13 is installed. The front and rear ends of the flangeless nut 1 are provided with threaded holes, and a push rod 4 and a magnetic ring 3 are respectively installed and fixed. A spiral hole is arranged in the middle part, and a ball screw 2 is installed through a plurality of balls. The push rod 4 covers the front end of the ball screw 2, and the rear end of the ball screw 2 extends through the rear end of the magnetic ring 3.

[0039] like Figure 2 As shown, the front and rear ends of the cylinder body 91 are respectively installed with a front cover 92 and a rear cover 93, and sealed with them. The front cover 92 and the rear cover 93 seal the flangeless nut 1 in the cylinder body for transmission. The flangeless nut 1 contacts the inner wall of the cylinder body 91 through the wear-resistant ring 12 on its outer surface, and the push rod 4 passes through the front cover 92 to extend the transfer rod 5. The cylinder body 91 is fixed to one side of the upper end of the return seat 94 through the rear cover 93, and the motor 10 is fixed to the other side of the upper end of the return seat 94. The rear end of the ball screw 2 and the rotating shaft of the motor 10 pass through the return seat 94 respectively, and are both installed with a synchronous pulley 1001. The rear end of the ball screw 2 and the synchronous pulley 1001 on the rotating shaft of the motor 10 are connected and transmitted through a synchronous belt 1002. A plurality of ball bearings 6 are also arranged between the ball screw 2 and the rear cover 93, and the ball screw 2 is rotatably arranged in the rear cover 93 through the plurality of ball bearings 6. Therefore, the rear cover also serves as the bearing seat of the new electric cylinder device.

[0040] Furthermore, the ball screw 2 is also locked and fixed in the ball bearing 6 of the rear end cover by a locking nut 7.

[0041] Furthermore, a folding seat cover 95 is provided at the rear end of the folding seat 94. The folding seat cover 95 covers the folding seat 94 and is fixed by fasteners, thereby sealing the synchronous pulley and the synchronous belt in the folding seat and the folding seat cover.

[0042] Furthermore, the rear end cover 93 is also provided with an oil filling hole and an oil filling nozzle seal.

[0043] The new reciprocating electric cylinder device provided by the utility model can achieve a larger electric cylinder thrust under the same volume, so it can be applied to some scenes with relatively high requirements. That is to say, under the same cylinder volume space requirement, the new electric cylinder device provided by the utility model can be equipped with a ball screw with a larger diameter, so as to output a greater thrust.

[0044] The flangeless reversing electric cylinder device of the utility model adopts a flangeless nut, and redesigns the flange + piston two independent parts of the original electric cylinder together, so that it has the functions of the piston and the nut. Therefore, the new electric cylinder device composed of the flangeless nut ensures that the cylinder body of the electric cylinder remains unchanged, and the ball screw can be made larger, thereby increasing its thrust.

[0045] like Figure 3-Figure 4 The figure shows the specific structure of the ball screw of the flangeless structure. It includes a flangeless nut 1, in which a ball screw 2 is installed through a plurality of balls in the spiral hole of the flangeless nut 1, and the threaded holes at the left and right ends of the nut respectively form a first threaded hole 1105 and a second threaded hole 1106, in which a magnetic ring 3 and a push rod 4 are installed respectively, and the push rod 4 is sleeved on the outside of the ball screw 2. Wear-resistant rings 12 are installed in the plurality of annular grooves on the outer surface of the flangeless nut 1, and guide keys 13 are installed in the plurality of keyways on the outer surface of the nut, and the guide keys are fixed in the keyways by fasteners.

[0046] Furthermore, a transfer rod 5 is provided at the front end of the push rod 4, and one end of the transfer rod 5 serves as a nut of the push rod 4 to seal the ball screw 2 in the push rod 4 for transmission, thereby preventing dust or foreign matter from falling into the push rod 4 and affecting the transmission of the ball screw 2 and the flangeless nut, and the other end serves as a transfer end.

[0047] Further, such as Figure 4 As shown, a limit nut 21 is also provided at the front end of the ball screw 2. The diameter of the limit nut 21 is larger than the diameter of the spiral hole and smaller than the inner diameter of the push rod, so that the limit nut limits the shaking of the screw when the nut body moves forward.

[0048] The outer diameter of the magnetic ring 3 is the same as that of the flangeless nut, and an annular groove is also provided on its outer surface and a wear-resistant ring is installed.

[0049] The ball screw composed of a ball screw nut with a flangeless structure adopts a new piston structure (i.e. a flangeless nut) instead of the original flange + piston structure. Therefore, when it is assembled into the cylinder body of the electric cylinder, the thrust of the electric cylinder can be increased while ensuring that the model of the electric cylinder remains unchanged, so that it can be used in more occasions with volume and thrust requirements.

[0050] like Figure 5-Figure 6The figure shows a specific structural diagram of a flangeless nut. The flangeless nut 1 comprises a nut body 11, the outer surface of which is regularly provided with one or more annular notches for installing a wear-resistant ring, and the middle position of the outer surface thereof is regularly provided with one or more keyways for installing a guide key along its length direction; the left and right ends of the nut body 11 are respectively provided with threaded holes to form a first threaded hole 1105 and a second threaded hole 1106, and the middle position thereof is provided with a spiral hole 1107, the spiral hole is connected with the first threaded hole and the second threaded hole, and is arranged concentrically therewith, and the apertures of the first threaded hole and the second threaded hole are both larger than the aperture of the spiral hole.

[0051] The annular notch is used to install the wear ring. In one embodiment, the annular notch is provided with two groups, such as Figure 6 As shown, the first annular notch 1101 and the second annular notch 1102 are respectively arranged at the left and right ends of the outer surface of the nut body 11 .

[0052] The key slot is used to install the guide key. In one embodiment, the key slot is also provided with two groups and symmetrically arranged, such as Figure 6 As shown, the first key groove 1103 and the second key groove 1104 are respectively arranged on the upper and lower sides or the front and rear sides of the outer surface of the nut body 11, respectively.

[0053] The first threaded hole 1105 is used to install the magnetic ring, the second threaded hole 1106 is used to install the push rod, and the middle threaded hole is equipped with a ball screw through a plurality of balls. The push rod in the second threaded hole is sleeved outside the ball screw, and the nut body is driven on the ball screw through a plurality of balls, thereby converting the rotational motion of the ball screw into the linear motion of the nut body, and then the push rod is driven to perform linear motion through the nut body.

[0054] Furthermore, the groove depth of the first annular notch 1101 and the second annular notch 1102 is 0.75-2.5 mm, and the width of the annular notch is 6-16 mm.

[0055] Furthermore, the groove depth of the first key groove 1103 and the second key groove 1104 is 3-5 mm, the width of the groove is 5-12 mm, and the length of the groove is 10-68 mm.

[0056] Furthermore, the diameter of the first threaded hole 1105 is 12-80 mm, and the depth is 15-96 mm.

[0057] Furthermore, the second threaded hole 1106 has a diameter of 10-80 mm and a depth of 8-20 mm.

[0058] Furthermore, the diameter of the spiral hole 1107 is 6-50 mm, and the depth is 17-82 mm.

[0059] The specific implementation examples of the opening diameters and depths of the first threaded hole, the second threaded hole and the spiral hole of the flangeless nut and the diameter and thrust of the nut body are shown in Table 1:

[0060] Table 1

[0061]

[0062] Among them, "12" in Example 1205 represents the diameter of the ball screw, and "05" represents its lead distance.

[0063] It can be seen from Table 1 that the larger the diameter of the spiral hole, the greater its thrust.

[0064] The nut of the original screw, such as Figure 5-Figure 6 As shown, because of the flange structure 101, when the piston body diameter is 49.5mm (i.e., the nut flange structure diameter), the nut diameter is 48mm, and can only be adapted to a ball screw of φ16mm at most, and can achieve a maximum thrust of 1000kgf. The ball screw nut without a flange structure provided by the present invention for a new electric cylinder has the functions of a piston and a nut at the same time. When the nut body diameter is 49.5mm, it can be adapted to a ball screw of φ20mm at most, and can achieve a maximum thrust of 1516kgf. Therefore, while achieving the same size volume, the thrust of the electric cylinder can be greatly improved.

[0065] 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 flangeless return electric cylinder device, characterized in that: It comprises a cylinder body, a ball screw with a flangeless structure, a return seat and a motor, wherein the ball screw with a flangeless structure is installed in the cylinder body, and the ball screw with a flangeless structure comprises a flangeless nut and a ball screw, wherein the flangeless nut is designed as a cylinder, and one or more annular notches are regularly arranged on its outer surface, and a wear-resistant ring is installed, and one or more keyways are also regularly arranged on its outer surface along its length direction, and a guide key is installed, threaded holes are arranged at the front and rear ends of the flangeless nut, and a push rod and a magnetic ring are installed respectively, a spiral hole is arranged in the middle part, and the ball screw is installed by means of a plurality of balls, the spiral hole is connected to the threaded holes at the front and rear ends of the flangeless nut, and is designed concentrically therewith, the push rod covers the front end of the ball screw, and the rear end of the ball screw passes through the rear end of the magnetic ring; The front and rear ends of the cylinder body are respectively equipped with a front cover and a rear cover and sealed therewith, the front cover and the rear cover seal the flangeless nut for transmission within the cylinder body, the flangeless nut contacts the inner wall of the cylinder body through the wear-resistant ring on its outer surface, and the push rod passes through the front cover to extend the adapter rod; the cylinder body is fixed to one side of the upper end of the folding seat through the rear cover, and the motor is fixed to the other side of the upper end of the folding seat, the rear end of the ball screw and the rotating shaft of the motor respectively pass through the folding seat, and are both equipped with synchronous pulleys, and the rear end of the ball screw and the synchronous pulley on the rotating shaft of the motor are connected and transmitted through a synchronous belt; a plurality of ball bearings are also arranged between the ball screw of the flangeless structure and the rear end cover, and the ball screw is rotatably arranged in the rear end cover through the plurality of ball bearings.

2. A novel flangeless return electric cylinder device as claimed in claim 1, characterized in that: A folding seat cover is also provided at the lower end of the folding seat, and the folding seat cover covers the lower end of the folding seat, and the synchronous pulley and the synchronous belt are sealed in the folding seat and the folding seat cover by fasteners.

3. A novel flangeless return electric cylinder device as claimed in claim 1, characterized in that: A dust ring is also arranged between the push rod and the front end cover.

4. A novel flangeless return electric cylinder device as claimed in claim 1, characterized in that: The annular notches are provided in two groups, which are respectively provided at the left and right ends of the flangeless nut.

5. A novel flangeless return electric cylinder device as claimed in claim 1, characterized in that: The keyways are provided in two groups and are symmetrically arranged, respectively arranged on the upper and lower sides or the left and right sides of the flangeless nut.

6. A novel flangeless return electric cylinder device as claimed in claim 1, characterized in that: The ball bearings are mounted at the front and rear ends of the rear end cover.

7. A novel flangeless return electric cylinder device as claimed in claim 1, characterized in that: A limiting nut is also arranged at the front end of the ball screw, and the diameter of the limiting nut is larger than the diameter of the spiral hole and smaller than the inner diameter of the push rod.

8. A novel flangeless reversing electric cylinder device as claimed in claim 1, characterized in that: The outer diameter of the magnetic ring is the same as the outer diameter of the flangeless nut, and an annular slot is also provided on the outer surface of the magnetic ring, and a wear-resistant ring is installed.

9. A novel flangeless reversing electric cylinder device as claimed in any one of claims 1 to 8, characterized in that: The rear end cover is also provided with an oil filling hole and an oil filling nozzle seal.

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