Transmission device beneficial to improving stability

Abstract

A transmission device facilitating stability improvement comprises a reciprocating motion assembly, a bearing assembly and a driving assembly. The reciprocating motion assembly comprises a sliding seat, a fixed table, a lead screw and a sliding table. The bearing assembly comprises a shaft sleeve, a shaft sleeve check ring, a flange ring, a bearing check ring and a bearing. The driving assembly comprises a driving motor, a coupler and a coupler shell. The output end of the driving motor drives the coupler and the lead screw to rotate. And one bearing assembly is arranged between the reciprocating motion assembly and the driving assembly. The radial inner side wall of the shaft sleeve is finely machined, so that the shaft sleeve has very high planeness and coaxiality, the coaxiality between the shaft sleeve and the bearing is further improved, the coaxiality of the assembled lead screw is guaranteed, vibration and deflection of the lead screw are greatly reduced, and the service life of the lead screw is prolonged. And meanwhile, the shaft sleeve subjected to finish machining can also prevent the bearing from shaking during use, so that the stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of transmission equipment technology, and in particular to a transmission device that is beneficial to improving stability. Background Technology

[0002] In modern mechanical transmission systems, the precision of the transmission device is crucial to the performance and stability of the equipment. However, in practical applications, due to assembly relationships and errors in the manufacturing process, the transmission precision is often difficult to achieve ideal conditions, leading to problems such as vibration during transmission. For example, if the center lines of components such as drive shafts, gears, and couplings are not precisely aligned during assembly, additional torque and vibration will be generated, causing vibration and affecting the smoothness and precision of the transmission.

[0003] Chinese patent CN201520010856.7 discloses a bearing sleeve, which includes a cylindrical body with a cavity for a drive shaft to pass through. One end of the body has an elastic ring, an elastic ring mounting assembly, and an elastic ring adjusting assembly. The inner circumferential surface of the elastic ring is adapted to the shape of the inner circumferential surface of the body. The elastic ring mounting assembly detachably mounts the elastic ring to the body, and the elastic ring adjusting assembly presses the elastic ring so that its inner circumferential surface is tightly against the drive shaft. This solution requires additional components to compensate for gaps, which is detrimental to cost control for enterprises. Utility Model Content

[0004] In view of this, the present invention provides a transmission device that is beneficial to improving stability, so as to solve the above-mentioned technical problems.

[0005] A transmission device that improves stability includes a reciprocating moving assembly, a bearing assembly disposed at one end of the reciprocating moving assembly, and a drive assembly passing through the bearing assembly. The reciprocating moving assembly includes a sliding seat with a U-shaped cross-section, a fixed platform disposed at one end of the sliding seat, a lead screw whose two ends are rotatably connected to the fixed platform and a bushing respectively, and a slide table slidably disposed on the lead screw. The bearing assembly includes a bushing inserted into the bushing mounting portion, a bushing retaining ring disposed at one end of the bushing, a flange ring disposed at the other end of the bushing, a bearing retaining ring fixedly disposed on the flange ring, and a plurality of bearings embedded in the inner hole of the bushing. The drive assembly includes a drive motor, a coupling connecting the output end of the drive motor and the fourth step, and a coupling housing whose two ends abut against the drive motor and the bushing mounting portion respectively. The output end of the drive motor drives the coupling and the lead screw to rotate.

[0006] Furthermore, the sliding seat includes a groove and a bushing mounting portion disposed at one end of the groove.

[0007] Furthermore, the fixing platform is fixedly disposed in the groove at one end near the observation hole; a fixing through hole is provided in the middle region of the fixing platform, and the central axis of the fixing through hole coincides with the central axis of the observation hole.

[0008] Furthermore, the flange ring and the bushing mounting portion are connected by fasteners.

[0009] Furthermore, the bearing retaining ring is fixed to the flange ring by fasteners.

[0010] Furthermore, after the bearing retaining ring is fixed to the flange ring, the distance between the bearing retaining ring and the bushing retainer is exactly divisible by the height of one or more of the bearings.

[0011] Furthermore, the lead screw includes a first step, a second step disposed at one end of the first step, a third step disposed at the end of the second step opposite to the first step, and a fourth step disposed at the end of the third step opposite to the second step.

[0012] Furthermore, the first step has at least one first bearing and a set of first fasteners for fixing the first bearing to the first step.

[0013] Furthermore, a set of second fixing members is provided on the third step. The second fixing members are clamped on both end faces of the plurality of bearings.

[0014] Furthermore, the coupling includes a coupling hole and a limiting ring disposed in the central region of the coupling hole.

[0015] Compared with the prior art, the present invention provides a transmission device that improves stability by setting a bearing assembly between the reciprocating moving component and the drive component. By finely machining the radial inner wall of the bushing to achieve high flatness and coaxiality, the coaxiality between the bushing and the bearing is improved, thus ensuring the coaxiality of the assembled lead screw, greatly reducing its vibration and deflection. A bearing retaining ring is provided at the other end of the bushing to ensure the accuracy of the multiple bearings installed in the bushing, making the central axes of the multiple bearings coincide. Simultaneously, the finely machined bushing also prevents the bearings from shaking during use, improving stability. Attached Figure Description

[0016] Figure 1 This utility model provides a structural schematic diagram of a transmission device that is beneficial to improving stability.

[0017] Figure 2 for Figure 1 A cross-sectional structural diagram of a transmission device that improves stability.

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of a bushing in a transmission device that improves stability.

[0019] Figure 4 for Figure 1 An exploded view of the stabilizing components of a transmission device that improves stability. Detailed Implementation

[0020] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0021] like Figures 1 to 4 The diagram shows a structural schematic of a transmission device that improves stability according to this invention. The transmission device includes a reciprocating component 10, a bearing assembly 20 disposed at one end of the reciprocating component 10, and a drive assembly 30 passing through the bearing assembly 20. It is conceivable that the transmission device may also include other functional structures, such as fasteners, gaskets, etc., which are well-known to those skilled in the art and will not be described in detail here.

[0022] The reciprocating motion component 10 includes a sliding seat 11 with a U-shaped cross-section, a fixed platform 12 disposed at one end of the sliding seat 11, a lead screw 13 whose two ends are respectively rotatably connected to the fixed platform 12 and the bearing assembly 20, and a slide table 14 slidably disposed on the lead screw 13.

[0023] The sliding seat 11 includes a groove 111 and a bushing mounting portion 112 disposed at one end of the groove 111.

[0024] The groove 111 is used to accommodate the fixed platform 12, the lead screw 13, and the slide 14. The bushing mounting part 112 is used to install the bearing assembly 20 and serves as an assembly component. The bushing mounting part 112 and the groove 111 are integrally machined to avoid assembly errors.

[0025] The fixing platform 12 is fixedly disposed in the groove 111. A fixing through hole 121 is provided in the central region of the fixing platform 12.

[0026] The lead screw 13 includes a first step 131, a second step 132 disposed at one end of the first step 131, a third step 133 disposed at the end of the second step 132 opposite to the first step 131, and a fourth step 134 disposed at the end of the third step 133 opposite to the second step 132.

[0027] The first step 131 has at least one first bearing 135 and a set of first fasteners 136 that fix the first bearing 135 to the first step 131. The first bearing 135 is fixedly disposed in the fixing through hole 121 to provide support for the first step 131. The second step 132 is provided with threads for use with the slide table 13, which will be described in conjunction with the slide table 13 below. The third step 133 is provided with a set of second fasteners 137. The second fasteners 137 are used to fix the lead screw 13 with the bearing assembly 20. One side of the second fastener 137 abuts against the end face of the second step 132 to position the lead screw 13 as a whole. The fourth step 134 is used to connect the drive assembly 20, which will be described in conjunction with the drive assembly 20 below.

[0028] The slide table 14 includes a slide table body 141 and an internally threaded bushing 142 that passes through and is fixed in the slide table body 141. The internally threaded bushing 142 is connected to the slide table body 141 by fasteners to ensure that the internally threaded bushing 142 can drive the slide table body 141 to move together.

[0029] A guide rail groove 143 is provided on the end face of the slide body 141 facing away from the groove 111. The slide body 141 is slidably connected to the external guide rail through the guide rail groove 143. When the slide body 141 is slidably connected to the external guide rail, the internal threaded bushing 142 can reciprocate axially along the lead screw 13 as the lead screw 13 rotates, thereby preventing the slide body 14 from rotating with the lead screw 13.

[0030] The bearing assembly 20 includes a bushing 21 inserted into the bushing mounting portion 112, a bushing retainer 22 disposed at one end of the bushing 21, a flange ring 23 disposed at the other end of the bushing 21, a bearing retainer 24 fixedly disposed on the flange ring 23, and a plurality of bearings 25 embedded in the inner hole of the bushing 21.

[0031] The inner hole of the bushing 21 is precision-machined to ensure accuracy, so that when the bushing 21 is assembled with the bearing 25, the inner wall of the bushing 21 fits tightly with the bearing 25, preventing the bearing 25 from shaking within the bushing 21. Since the bushing 21 is an independent workpiece and its volume is much smaller than that of the sliding seat 11, it is suitable for independent machining. This allows for fine machining of its radial inner wall, ensuring high flatness and coaxiality, thereby improving the coaxiality between the bushing 21 and the bearing 25, and thus ensuring the coaxiality of the assembled lead screw 13. Improved coaxiality of the lead screw 13 significantly reduces its vibration and deflection, thus ensuring the machining accuracy of the equipment loaded on the slide table 14. The assembly between the bushing 21 and the sliding seat 11 can be adjusted using fasteners, etc. Furthermore, since the radial outer wall of the bushing 21 is also finely machined, its coaxiality and flatness are guaranteed, thus making the error between the bushing 21 and the sliding seat 11 relatively small, facilitating adjustment. Moreover, since only the error between the bushing 21 and the sliding seat 11 needs to be adjusted, the adjustment is even easier.

[0032] The bushing 21 and the bearing 25 are assembled by heating the bushing 21 to expand it, allowing the bearing 25 at room temperature to be inserted into the bushing 21. After the bushing 21 cools naturally, a tight fit is ensured. Furthermore, the outer surface of the bushing 21 is kept parallel to the inner wall of the bushing mounting portion 112, ensuring that the central axis of the bushing 21 coincides with the central axis of the bushing mounting portion 112 and the fixing through hole 121.

[0033] Please see Figure 3 The bushing retaining ring 22 is used to abut against one end face of one of the bearings 25, serving as a one-end limit. The flange ring 23 is connected to the bushing mounting part 112 by fasteners. The bearing retaining ring 24 is fixed to the flange ring 23 by fasteners. The bearing retaining ring 24 is used to press the two end faces of multiple bearings 25 together after the bearings 25 are installed, thereby fixing the two end faces of multiple bearings 25 and preventing axial movement of multiple bearings 25. It can be imagined that after the bearing retaining ring 24 is fixed to the flange ring 23, the distance between the bearing retaining ring 24 and the bushing retaining ring 22 is exactly divisible by the height of one or more bearings 25. At the same time, the distance between the bearing retaining ring 24 and the flange ring 23 is finely adjusted by adjusting the tightness of the fasteners.

[0034] The drive assembly 30 includes a drive motor 31, a coupling 32 connecting the output end of the drive motor 31 and the fourth step 134, and a coupling housing 33 with its two ends respectively abutting the drive motor 31 and the bushing mounting part 112.

[0035] The output of the drive motor 31 drives the coupling 32 and the lead screw 13 to rotate.

[0036] The coupling 32 includes a coupling hole 321 and a limiting ring 322 disposed in the middle region of the coupling hole 321. The two ends of the coupling hole 321 are interference-fitted with the output end of the drive motor 31 and the fourth step 144. The limiting ring 322 limits the maximum distance that the output end of the drive motor 21 and the fourth step 144 are inserted into the coupling hole 321, so that the forces on both ends of the coupling hole 321 are balanced, thereby reducing slippage.

[0037] The coupling housing 33 can further strengthen the connection between the drive motor 31 and the bushing mounting part 112, while protecting the coupling 32 and isolating it from external debris and dust.

[0038] In use, the drive motor 31 drives the lead screw 13 to rotate, causing the slide table 14 to move along the axial direction of the lead screw 13.

[0039] Compared with the prior art, the present invention provides a transmission device that improves stability by setting a bearing assembly 20 between the reciprocating moving component 10 and the drive assembly 30. By finely machining the radial inner wall of the bushing 21 to achieve high flatness and coaxiality, the coaxiality between the bushing 21 and the bearing 25 is improved, thus ensuring the coaxiality of the assembled lead screw 13, greatly reducing its vibration and deflection. A bearing retaining ring 24 is provided at the other end of the bushing 21 to ensure the accuracy of the installation of multiple bearings 25 into the bushing 21, making the central axes of the multiple bearings 25 coincide. Simultaneously, the finely machined bushing 21 also prevents the bearings 25 from shaking during use, improving stability.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A transmission device that improves stability, characterized in that: The transmission device, which improves stability, includes a reciprocating moving assembly, a bearing assembly disposed at one end of the reciprocating moving assembly, and a drive assembly passing through the bearing assembly. The reciprocating moving assembly includes a sliding seat with a U-shaped cross-section, a fixed platform disposed at one end of the sliding seat, a lead screw with both ends rotatably connected to the fixed platform and the bushing, and a slide table slidably disposed on the lead screw. The bearing assembly includes a bushing inserted into the bushing mounting portion, a bushing retaining ring disposed at one end of the bushing, a flange ring disposed at the other end of the bushing, a bearing retaining ring fixedly disposed on the flange ring, and a plurality of bearings embedded in the inner hole of the bushing. The drive assembly includes a drive motor, a coupling connecting the output end of the drive motor and the fourth step, and a coupling housing with both ends abutting against the drive motor and the bushing mounting portion, respectively. The output end of the drive motor drives the coupling and the lead screw to rotate.

2. The transmission device as described in claim 1, which is beneficial for improving stability, is characterized in that: The sliding seat includes a groove and a bushing mounting portion disposed at one end of the groove.

3. The transmission device as described in claim 1, which is beneficial for improving stability, is characterized in that: The fixed platform is fixedly disposed in the groove at one end near the observation hole; a fixed through hole is provided in the middle region of the fixed platform, and the central axis of the fixed through hole coincides with the central axis of the observation hole.

4. The transmission device as described in claim 1, which is beneficial for improving stability, is characterized in that: The flange ring is connected to the bushing mounting part by fasteners.

5. The transmission device as described in claim 1, which is beneficial for improving stability, is characterized in that: The bearing retaining ring is fixed to the flange ring by fasteners.

6. The transmission device as described in claim 1, which is beneficial for improving stability, is characterized in that: After the bearing retaining ring is fixed to the flange ring, the distance between the bearing retaining ring and the bushing retainer is exactly divisible by the height of one or more of the bearings.

7. The transmission device as described in claim 1, which is beneficial for improving stability, is characterized in that: The lead screw includes a first step, a second step disposed at one end of the first step, a third step disposed at the end of the second step opposite to the first step, and a fourth step disposed at the end of the third step opposite to the second step.

8. The transmission device as described in claim 7, which is beneficial for improving stability, is characterized in that: The first step has at least one first bearing and a set of first fasteners for fixing the first bearing to the first step.

9. The transmission device as described in claim 7, which is beneficial for improving stability, is characterized in that: A set of second fixing members is provided on the third step. The second fixing members are clamped on both end faces of the plurality of bearings.

10. The transmission device as described in claim 1, which is beneficial for improving stability, is characterized in that: The coupling includes a coupling hole and a limiting ring disposed in the middle region of the coupling hole.

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