Lead screw auxiliary supporting structure and electric module

Abstract

The utility model discloses a lead screw auxiliary supporting structure and an electric module, the lead screw auxiliary supporting structure comprises two auxiliary supporting blocks which are in sliding fit with a lead screw, a sliding seat is located between the two auxiliary supporting blocks in the axial direction of the lead screw, and the two auxiliary supporting blocks are installed on the inner bottom surface of a lead screw installation seat through an auxiliary sliding structure; the auxiliary sliding structure comprises an auxiliary sliding groove and an auxiliary sliding rail which are in sliding fit in the axial direction of the lead screw, one of the auxiliary sliding groove and the auxiliary sliding rail is arranged at the bottom of the auxiliary supporting block, and the other is arranged on the inner bottom face of the lead screw installation base. The connecting structure is connected with the two auxiliary supporting blocks; and the elastic buffer structure is located between the auxiliary sliding groove and the auxiliary sliding rail. The structure of the auxiliary supporting block can be simplified, the assembling difficulty of the auxiliary supporting block can be reduced, the machining precision and the assembling precision can be controlled more easily, the machining error and the assembling error of the auxiliary sliding groove and the auxiliary sliding rail can be made up through the elastic buffering structure, and the problems of vibration and noise in the operation process can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric modules, in particular to a screw auxiliary support structure and an electric module. Background Art

[0002] This section is intended to provide a background or context to the embodiments of the utility model recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

[0003] The prior art discloses a slide-type electric module, which uses a nylon slide made of elastic rubber material as an auxiliary support for the lead screw to prevent the lead screw from sagging due to its own weight and generating vibration and noise. The slide-type electric module mainly includes a base, a motor, a lead screw, a track, a slide and a nut. The lead screw is mounted in the base and connected to the motor. The nut is threadedly connected to the lead screw. The slide is installed on the nut and slides with the track set in the base. Two auxiliary slides are arranged in the base, and the two auxiliary slides are connected by a connecting rod. Two auxiliary tracks are arranged on the two inner sides of the base. The two sides of the auxiliary slide slide with the two auxiliary tracks through rollers. When the lead screw rotates under the drive of the motor, the slide is driven to move along the axial direction of the lead screw. When the slide slides to contact with an auxiliary slide, it can push the auxiliary slide to move, and the slide can pull another auxiliary slide to move synchronously through the connecting rod, so as to support the lead screw with the auxiliary slide.

[0004] The inventor of the utility model found that the auxiliary support structure of the screw in the prior art is relatively complex, and accordingly, the manufacturing cost is relatively high, and difficult assembly operations are required to ensure that the assembly tolerance between the roller and the auxiliary rail meets the requirements. If the assembly tolerance does not meet the requirements, there will be a risk of jamming and noise problems during operation. Utility Model Content

[0005] The utility model aims to provide a screw auxiliary support structure and an electric module to solve the technical problems of high manufacturing cost and great assembly difficulty of the current screw auxiliary support structure.

[0006] The above-mentioned purpose of the utility model can be achieved by adopting the following technical solutions:

[0007] The cam is an axially movable member which is adapted to move the guide rails relative to the bearings of the sliding seat and to move the guide rails relative to the bearings in a controlled manner.

[0008] In an implementation manner of the utility model, the auxiliary support block is provided with a mounting hole, and the lead screw is passed through the mounting hole and is arranged in a sliding cooperation with the mounting hole.

[0009] In an implementation manner of the utility model, the elastic buffer structure includes two buffer pads, and an auxiliary slide groove is respectively provided at the bottom of the two auxiliary support blocks, and the two buffer pads are installed in the two auxiliary slide grooves.

[0010] In an embodiment of the utility model, the elastic buffer structure also includes two guide members, an auxiliary slide rail is provided on the inner bottom surface of the screw mounting seat, the two guide members are installed in the two auxiliary slide grooves and slidingly cooperate with the auxiliary slide rails, and the two buffer pads are clamped between the two guide members and the inner wall surfaces of the two auxiliary slide grooves.

[0011] In an implementation manner of the utility model, when one of the auxiliary support blocks moves to one end of the lead screw along with the slide seat, the other auxiliary support block is located at the middle position of the lead screw.

[0012] The utility model also provides an electric module, comprising the above-mentioned lead screw auxiliary support structure.

[0013] The characteristics and advantages of this utility model are:

[0014] The screw auxiliary support structure and electric module of the utility model, by slidingly matching the auxiliary support block with the screw, and slidingly matching the auxiliary support block on the inner bottom surface of the screw mounting seat through the auxiliary sliding structure, thereby using the auxiliary support block to support the screw, which is beneficial to simplify the structure of the auxiliary support block and reduce the difficulty of assembly between the auxiliary support block, the screw and the screw mounting seat, and can more easily control the processing accuracy and assembly accuracy of the auxiliary slide groove and the auxiliary slide rail of the auxiliary sliding structure. In addition, by arranging an elastic buffer structure between the auxiliary slide groove and the auxiliary slide rail, not only can the processing error and assembly error of the auxiliary slide groove and the auxiliary slide rail be compensated, ensuring that the auxiliary support block can slide smoothly on the inner bottom surface of the screw mounting seat driven by the slide seat, but also can improve the vibration and noise problems during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a longitudinal cross-sectional schematic diagram of the screw auxiliary support structure in the utility model installed in the electric module.

[0017] Figure 2 This is a disassembly diagram of the screw auxiliary support structure in the utility model.

[0018] Figure 3 It is a schematic cross-sectional view of the auxiliary support block in the utility model.

[0019] Figure 4 This is a disassembled diagram of the electric module in the present invention (motor omitted).

[0020] Figure 5 It is a three-dimensional diagram of the appearance of the electric module in the utility model.

[0021] Figure 6 It is a schematic cross-sectional view of the screw mounting seat in the utility model.

[0022] In the figure:

[0023] 10. Screw mounting seat; 11. Base; 12. Side wall; 13. Front cover; 14. Rear cover; 15. Gland; 16. Lock nut; 17. First bearing; 18. Second bearing; 19. Third bearing; 110. Guide rail; 111. Magnetic strip;

[0024] 21. Lead screw; 22. Ball screw nut; 23. Sliding seat; 231. Mounting boss; 24. Ball assembly;

[0025] 30. Auxiliary support structure of lead screw; 31. Auxiliary support block; 311. Connecting boss; 312. Mounting hole; 32. Connecting structure; 321. Connecting rod; 322. Bayonet; 33. Elastic buffer structure; 331. Buffer pad; 332. Guide member; 34. Auxiliary sliding structure; 341. Auxiliary slide groove; 342. Auxiliary slide rail;

[0026] 40. Dustproof belt. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Implementation Method 1

[0029] like Figure 1 , Figure 2 as well as Figure 3 As shown, the utility model provides a screw auxiliary support structure 30 for supporting the screw 21. The screw 21 is rotatably mounted in the screw mounting seat 10. The screw 21 is threaded with a ball nut 22. The ball nut 22 can drive the slide 23 to slide along the axial direction Z of the screw 21 in the screw mounting seat 10. The screw auxiliary support structure 30 includes: two auxiliary support blocks 31, which are mounted in the screw mounting seat 10 and are slidably matched with the screw 21 along the axial direction of the screw 21, and the slide 23 is located at two positions on the axial direction Z of the screw 21. Between the auxiliary support blocks 31, the two auxiliary support blocks 31 are installed on the inner bottom surface of the screw mounting seat 10 through the auxiliary sliding structure 34, and the auxiliary sliding structure 34 includes an auxiliary slide groove 341 and an auxiliary slide rail 342 that slide along the axial direction of the screw 21; the auxiliary slide groove 341 and the auxiliary slide rail 342, one of which is arranged at the bottom of the auxiliary support block 31, and the other is arranged on the inner bottom surface of the screw mounting seat 10; the connecting structure 32 connects the two auxiliary support blocks 31; the elastic buffer structure 33 is located between the auxiliary slide groove 341 and the auxiliary slide rail 342.

[0030] The screw auxiliary support structure 30 of the present invention, by slidingly matching the auxiliary support block 31 with the screw 21, and slidingly matching the auxiliary support block 31 on the inner bottom surface of the screw mounting seat 10 through the auxiliary sliding structure 34, while using the auxiliary support block 31 to support the screw 21, is conducive to simplifying the structure of the auxiliary support block 31 and reducing the difficulty of assembling the auxiliary support block 31, the screw 21 and the screw mounting seat 10, and can more easily control the processing accuracy and assembly accuracy of the auxiliary slide groove 341 and the auxiliary slide rail 342 of the auxiliary sliding structure 34. In addition, by setting an elastic buffer structure 33 between the auxiliary slide groove 341 and the auxiliary slide rail 342, not only can the processing error and assembly error of the auxiliary slide groove 341 and the auxiliary slide rail 342 be compensated, ensuring that the auxiliary support block 31 can slide smoothly on the inner bottom surface of the screw mounting seat 10 driven by the slide seat 23, but also the vibration and noise problems during operation can be improved.

[0031] like Figure 1 As shown, the screw auxiliary support structure 30 of the utility model can be used in the electric module to support the screw 21. The two ends of the screw mounting seat 10 are provided with two end covers. For the convenience of description, the two end covers are respectively defined as the front end cover 13 and the rear end cover 14. The front end of the screw 21 is rotatably mounted on the front end cover 13, and the rear end of the screw 21 is rotatably mounted on the rear end cover 14. The screw 21 rotates under the drive of the motor. Of course, it can also be used in other screw transmission equipment to support the screw 21, and can also produce the same beneficial effects as mentioned above.

[0032] When the lead screw 21 rotates and drives the ball screw nut 22 to slide along the lead screw 21, the slide 23 slides synchronously with the ball screw nut 22. When the slide 23 slides to contact with an auxiliary support block 31, it can push the auxiliary support block 31 to slide synchronously along the axial direction Z of the lead screw 21 and support the lead screw 21. At the same time, the auxiliary support block 31 drives the other auxiliary support block 31 to slide synchronously along the axial direction Z of the lead screw 21 and support the lead screw 21 through the connecting structure 32. Therefore, when the slide 23 does not slide to contact with one of the auxiliary support blocks 31, the positions of the two auxiliary support blocks 31 supporting the lead screw 21 remain unchanged, and only the slide 23 changes its position of supporting the lead screw 21 during the sliding process. When the slide 23 slides to contact with any auxiliary support block 31 and causes the two auxiliary support blocks 31 to slide synchronously, the two auxiliary support blocks 31 can change their positions of supporting the lead screw 21 during the sliding process.

[0033] Therefore, combined with Figure 1As shown, in order to make the supporting positions of the two auxiliary support blocks 31 appropriate, in the embodiment of the utility model, one auxiliary support block 31 slides to one end of the lead screw 21 with the slide 23, and the other auxiliary support block 31 is located at the middle position of the lead screw 21 (it can be the midpoint of the lead screw 21, or it can be a position close to the midpoint), that is, the auxiliary support block 31 is substantially located at the middle position of the suspended part of the lead screw 21. Therefore, the spacing between the two auxiliary support blocks 31 is equal to or close to half the length of the lead screw 21.

[0034] Specifically, when the slide seat 23 drives the front auxiliary support block 31 to slide forward until it abuts against the front end cover 13, the rear auxiliary support block 31 can just slide to the middle position of the screw 21, and then when the slide seat 23 slides backward to the middle position of the screw 21 and abuts against the rear auxiliary support block 31, it can push the rear auxiliary support block 31 to slide backward. When the distance between the rear auxiliary support block 31 and the rear end cover 14 is approximately equal to one-fourth of the length of the screw 21, the distance between the front auxiliary support block 31 and the front end cover 13 is also approximately equal to one-fourth of the length of the screw 21. Similarly, when the slide seat 23 drives the rear auxiliary support block 31 to slide backward until it abuts against the rear end cover 14, the front auxiliary support block 31 can just slide to the middle position of the screw 21, thereby supporting the entire screw 21 more stably and preventing the suspended part of the screw 21 from being too long and sagging.

[0035] like Figure 2 and Figure 3 As shown, in the embodiment of the utility model, the auxiliary support block 31 is provided with a mounting hole 312, and the lead screw 21 is inserted into the mounting hole 312 and is arranged to slide with the mounting hole 312, which has a simple structure and is easy to process. Specifically, the inner diameter of the mounting hole 312 is slightly larger than the outer diameter of the lead screw 21, such as the inner diameter of the mounting hole 312 is preferably 0.03mm-0.06mm larger than the outer diameter of the lead screw 21. Of course, the matching clearance between the mounting hole 312 and the lead screw 21 can also be adjusted according to the assembly requirements of the lead screw 21 to ensure that the coaxiality between the lead screw 21 and the rotating shaft of the motor under the support of the auxiliary support block 31 always meets the requirements. Optionally, the auxiliary support block 31 is provided with a groove with an opening facing upward and through front and back, and the lead screw 21 is inserted into the groove and can slide along the groove; wherein, the cross section of the groove is semicircular.

[0036] like Figure 2 and Figure 3As shown, in the embodiment of the utility model, the elastic buffer structure 33 includes two buffer pads 331, and an auxiliary slide groove 341 is respectively provided at the bottom of the two auxiliary support blocks 31, and the two buffer pads 331 are installed in the two auxiliary slide grooves 341. The elastic buffer structure 33 also includes two guide members 332, and an auxiliary slide rail 342 is provided on the inner bottom surface of the screw mounting seat 10. The two guide members 332 are installed in the two auxiliary slide grooves 341 and slide with the auxiliary slide rail 342. The two buffer pads 331 are sandwiched between the two guide members 332 and the inner wall surfaces of the two auxiliary slide grooves 341. By providing the auxiliary slide groove 341 at the bottom of the auxiliary support block 31, and the auxiliary slide rail 342 is provided on the inner bottom surface of the screw mounting seat 10, it is more convenient to install the buffer pad 331 and the guide member 332 on the auxiliary support block 31, and then slide along the auxiliary slide rail 342 with the auxiliary support block 31.

[0037] Specifically, the buffer pad 331 is generally a gasket structure made of sponge or other flexible materials. The guide member 332 is generally a sliding plate structure with a smooth surface, which fits the auxiliary slide rail 342, and there is a small friction between the guide member 332 and the auxiliary slide rail 342, thereby ensuring that the auxiliary support block 31 can slide smoothly. The auxiliary slide groove 341 is generally a dovetail groove, and the buffer pad 331 and the guide member 332 are stuck in the auxiliary slide groove 341. The material of the guide member 332 can be polytetrafluoroethylene plastic, which has good wear resistance and a small friction coefficient.

[0038] like Figure 2 and Figure 3 As shown, in the embodiment of the present utility model, two connecting bosses 311 are provided on both sides of the auxiliary support block 31, that is, a connecting boss 311 is provided on both sides of the auxiliary support block 31, the connecting structure 32 includes two connecting rods 321, and the slide 23 is provided with a clearance groove for the two connecting rods 321 to pass through; one end of the two connecting rods 321 is connected to the two connecting bosses 311 of one auxiliary support block 31, and the other end of the two connecting rods 321 passes through the two clearance grooves and is connected to the two connecting bosses 311 of the other auxiliary support block 31. Specifically, the connecting boss 311 is arranged near the bottom of the auxiliary support block 31, and the clearance groove is located at the bottom of the slide 23. The two auxiliary support blocks 31 are provided with a socket for installing the connecting rod 321, and the two ends of the connecting rod 321 are inserted into the sockets of the two auxiliary support blocks 31 and fixed by a bayonet 322 and a screw. Of course, two or more connecting bosses 311 can also be provided on both sides of the auxiliary support block 31, and connected by more connecting rods 321.

[0039] Implementation Method 2

[0040] like Figures 1 to 5As shown, the utility model further provides an electric module, including a screw auxiliary support structure 30. The screw auxiliary support structure 30 in this embodiment is the same as the screw auxiliary support structure 30 in the first embodiment in terms of specific structure, working principle and beneficial effects, which will not be repeated here.

[0041] Specifically, the electric module also includes a screw mounting seat 10, a screw 21, a ball screw nut 22, a slide seat 23 and a motor. The screw 21 is rotatably mounted in the screw mounting seat 10 and connected to the motor. The ball screw nut 22 is threadedly connected to the screw 21. The ball screw nut 22 is arranged in the screw mounting seat 10 in a sliding manner along the axial direction of the screw 21 through the slide seat 23. Two end covers (i.e., a front end cover 13 and a rear end cover 14) are provided at both ends of the screw mounting seat 10. The screw 21 is rotatably mounted on the two end covers. The front end of the screw 21 is rotatably mounted on the front end cover 13 through a first bearing 17 and a second bearing 18, and the screw 21 is axially limited by a pressure cover 15 and a locking nut 16. The rear end of the screw 21 is rotatably mounted on the rear end cover 14 through a third bearing 19. The front end of the screw 21 extends from the front end cover 13 and can be connected to the rotating shaft of the motor, so that the motor drives the screw 21 to rotate.

[0042] Combination Figure 3 and Figure 6 As shown, the screw mounting seat 10 includes a base 11 and two side walls 12. The screw auxiliary support structure 30 is installed on the inner bottom surface of the base 11 through an auxiliary sliding structure 34. The two side walls 12 are relatively arranged on the top of the base 11 and connected to the base 11. Two guide rails 110 are arranged on the two inner side surfaces of the base 11 along the axial direction of the screw 21. The two sides of the slide seat 23 abut against the two guide rails 110 through two ball assemblies 24 and can slide along the two guide rails 110.

[0043] like Figure 1 , Figure 4 as well as Figure 5 As shown, the electric module also includes a dustproof belt 40, both ends of which are fixed to the top of the front cover 13 and the rear cover 14, and two magnetic strips 111 are laid on the top of the two side walls 12 along the axial direction of the lead screw 21, and the dustproof belt 40 is adsorbed on the two magnetic strips 111. Two mounting bosses 231 are provided on the top of the slide seat 23, and the two mounting bosses 231 are supported on the top of the two side walls 12 and are located below the dustproof belt 40, and the two mounting bosses 231 can overcome the adsorption force between the dustproof belt 40 and the two magnetic strips 111 and slide between the dustproof belt 40 and the two side walls 12 along the axial direction Z of the lead screw 21.

[0044] Specifically, the dustproof belt 40 is a steel belt, and its shape can adapt to the slide seat 23 as the slide seat 23 slides. The two ends of the dustproof belt 40 are fixed to the top of the front cover 13 and the rear cover 14 by screws. The two mounting bosses 231 are used to install accessories, so that the accessories are driven to move along the axial direction Z of the lead screw 21 through the slide seat 23.

[0045] The above are only several embodiments of the present invention. Those skilled in the art can make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A screw auxiliary support structure, used for supporting a screw (21), wherein the screw (21) is rotatably mounted in a screw mounting seat (10), and a ball nut (22) is threadedly matched on the screw (21), and the ball nut (22) can drive a slide seat (23) to slide along the axial direction of the screw (21) in the screw mounting seat (10); It is characterized in that The screw auxiliary support structure (30) comprises: Two auxiliary support blocks (31) are installed in the screw mounting seat (10) and are arranged to slide with the screw (21) along the axial direction of the screw (21), and the slide seat (23) is located between the two auxiliary support blocks (31) in the axial direction of the screw (21). The two auxiliary support blocks (31) are installed on the inner bottom surface of the screw mounting seat (10) through an auxiliary sliding structure (34). The auxiliary sliding structure (34) includes an auxiliary slide groove (341) and an auxiliary slide rail (342) that slide along the axial direction of the screw (21); one of the auxiliary slide groove (341) and the auxiliary slide rail (342) is arranged at the bottom of the auxiliary support block (31), and the other is arranged on the inner bottom surface of the screw mounting seat (10); A connecting structure (32) connecting the two auxiliary support blocks (31); The elastic buffer structure (33) is located between the auxiliary slide groove (341) and the auxiliary slide rail (342).

2. The screw auxiliary support structure according to claim 1, characterized in that: The auxiliary support block (31) is provided with a mounting hole (312), and the lead screw (21) is inserted into the mounting hole (312) and is arranged in a sliding manner with the mounting hole (312).

3. The screw auxiliary support structure according to claim 1, characterized in that: The elastic buffer structure (33) comprises two buffer pads (331), and an auxiliary slide groove (341) is respectively arranged at the bottom of the two auxiliary support blocks (31), and the two buffer pads (331) are installed in the two auxiliary slide grooves (341).

4. The screw auxiliary support structure according to claim 3, characterized in that: The elastic buffer structure (33) also includes two guide members (332), an auxiliary slide rail (342) is provided on the inner bottom surface of the screw mounting seat (10), the two guide members (332) are installed in the two auxiliary slide grooves (341) and slidably cooperate with the auxiliary slide rail (342), and the two buffer pads (331) are clamped between the two guide members (332) and the inner wall surfaces of the two auxiliary slide grooves (341).

5. The screw auxiliary support structure according to claim 1, characterized in that: When one of the auxiliary support blocks (31) moves to one end of the lead screw along with the slide seat (23), the other auxiliary support block (31) is located at the middle position of the lead screw (21).

6. An electric module, characterized in that: The electric module comprises a screw auxiliary support structure (30) according to any one of claims 1 to 5.

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