Transmission device

By employing a coaxially arranged first and second gear in the gear transmission system and utilizing adjusting and fixing components to eliminate gear backlash, the backlash problem in the forward and reverse rotation process of the gear transmission system is solved, thereby improving transmission accuracy and reliability.

CN222315811UActive Publication Date: 2025-01-07PINGSENG HEALTHCARE KUNSHAN
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202421325872.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-12
Publication Date
2025-01-07
Estimated Expiration
2034-06-12

AI Technical Summary

Technical Problem

When switching between forward and reverse rotation, backlash occurs due to meshing clearance in gear transmission systems, affecting transmission accuracy and reliability.

Method used

The first and second gears are coaxially arranged. The tooth grooves of the first gear and the third gear are offset and abutted by the adjustment component, and the coaxial fixing component is used to fix them, thus eliminating the gap during the forward and reverse rotation of the gears.

Benefits of technology

It effectively reduces backlash, improves transmission accuracy and reliability, and enhances the stability and durability of the transmission system.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222315811U_ABST
    Figure CN222315811U_ABST
Patent Text Reader

Abstract

The utility model belongs to the technical field of transmission systems, and discloses a transmission device. The transmission device comprises a first gear, a second gear, a third gear, an adjusting assembly and a fixing assembly, the first gear and the second gear are the same in reference diameter, tooth pitch and tooth number and are coaxially arranged, the first gear comprises a plurality of first teeth, the second gear comprises a plurality of second teeth, the first teeth correspond to the second teeth in a one-to-one mode, and the third gear comprises a plurality of third teeth. A tooth groove is formed between every two adjacent third teeth, the adjusting assembly is used for enabling the first teeth and the second teeth to be staggered so that the first teeth can abut against one sides of the tooth grooves, the second teeth can abut against the other sides of the tooth grooves, and after the adjusting assembly adjusts the position of the first teeth relative to the second teeth, the fixing assembly is used for coaxially fixing the first gear and the second gear. The clearance generated in the forward and reverse rotation process of the gear is effectively eliminated, so that the return difference is reduced, and the transmission precision and the transmission reliability are improved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

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

[0002] Gear transmission system is the most common and widely used transmission method in mechanical engineering, and is widely used in various mechanical equipment, such as automobiles, machine tools, robots, etc. Gear transmission system realizes the transmission of power and motion through the meshing of gears.

[0003] However, during the operation of the gear transmission system, due to the meshing clearance between the teeth of one of the two gears and the tooth grooves of the other gear, the gear transmission system will produce backlash when switching between forward and reverse rotations, affecting the transmission accuracy.

[0004] Therefore, there is an urgent need for a transmission device to solve the problems in the prior art. Utility Model Content

[0005] The utility model aims to provide a transmission device, which effectively eliminates the gap generated during the forward and reverse rotation of the gears, thereby reducing the backlash and improving the transmission accuracy and reliability.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Transmission device, including:

[0008] A first gear and a second gear, wherein the first gear and the second gear have the same pitch circle diameter, tooth pitch and number of teeth and are coaxially arranged, the first gear includes a plurality of first teeth, the second gear includes a plurality of second teeth, and the first teeth correspond to the second teeth one by one;

[0009] A third gear, comprising a plurality of third teeth, with a tooth groove being provided between two adjacent third teeth;

[0010] an adjustment assembly, used for staggering the first tooth and the second tooth so that the first tooth abuts against one side of the tooth groove and the second tooth abuts against the other side of the tooth groove;

[0011] A fixing assembly is used to fix the first gear and the second gear coaxially after adjusting the position of the first gear relative to the second gear.

[0012] Optionally, the adjustment component includes:

[0013] A ball bearing, wherein an arc groove is provided on a side of the first gear facing the second gear, and at least one of the balls is disposed in the arc groove;

[0014] An adjusting screw, one end of which is provided with a tapered portion, the adjusting screw is passed through the second gear and is threadedly connected to the second gear, at least part of the tapered portion is inserted into the arc groove and abuts against the ball, so that the first gear rotates relative to the second gear.

[0015] Optionally, a first threaded hole is provided on the second gear, and the adjusting screw passes through the first threaded hole and is threadably connected to the second gear.

[0016] Optionally, two balls are provided in the arc groove, and the conical portion drives the first gear to rotate relative to the second gear through the two balls.

[0017] Optionally, the ball is made of metal.

[0018] Optionally, the fixing assembly includes a fastening screw, a second threaded hole is provided on the first gear, an arc-shaped hole is provided on the second gear corresponding to the second threaded hole, the fastening screw is sequentially passed through the arc-shaped hole and the second threaded hole, the nail cap of the fastening screw abuts against the side of the second gear away from the first gear, and the fastening screw is threadedly connected to the first gear.

[0019] Optionally, a gasket is provided between the nail cap of the fastening screw and the second gear.

[0020] Optionally, one of the first gear and the second gear is provided with an annular groove, the rotation axis of the annular groove is coaxial with the rotation axis of the first gear, and the other of the first gear and the second gear is provided with an annular protrusion, and the annular protrusion is inserted in the annular groove.

[0021] Optionally, the depth of the tooth groove matches the height of the first tooth and the second tooth.

[0022] Optionally, a plurality of mounting holes are provided on the third gear along the circumferential direction of the third gear.

[0023] Beneficial effects:

[0024] The present embodiment provides a transmission device, including a first gear, a second gear, a third gear, an adjustment component and a fixing component. The first gear and the second gear have the same pitch circle diameter, tooth pitch and number of teeth and are coaxially arranged. The first gear includes a plurality of first teeth, the second gear includes a plurality of second teeth, the first teeth correspond to the second teeth one-to-one, the third gear includes a plurality of third teeth, and a tooth groove is provided between two adjacent third teeth. The adjustment component is used to stagger the first tooth and the second tooth so that the first tooth abuts against one side of the tooth groove and the second tooth abuts against the other side of the tooth groove. After the adjustment component adjusts the position of the first tooth relative to the second tooth, the fixing component is used to fix the first gear and the second gear coaxially, effectively eliminating the gap generated during the forward and reverse rotation of the gears, thereby reducing the backlash and improving the transmission accuracy and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the first gear, the second gear and the third gear provided by the utility model after being assembled at a certain viewing angle;

[0026] Figure 2 It is a schematic structural diagram of the first gear, the second gear and the third gear provided by the utility model after being assembled from another perspective;

[0027] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0028] Figure 4 yes Figure 2 Sectional view at the middle BB;

[0029] Figure 5 yes Figure 4 A partial enlarged view of point C in the middle.

[0030] In the figure:

[0031] 100, first gear; 110, first tooth; 120, arc groove;

[0032] 200, second gear; 210, second tooth; 220, first threaded hole; 230, arc-shaped hole;

[0033] 300, third gear; 310, third tooth; 320, tooth groove;

[0034] 400, adjustment assembly; 410, ball bearing; 420, adjustment screw; 421, tapered portion;

[0035] 510. Tighten the screws. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] This embodiment provides a transmission device, such as Figure 1-Figure 5As shown, it includes a first gear 100, a second gear 200, a third gear 300, an adjustment component 400 and a fixing component. The first gear 100 and the second gear 200 have the same pitch circle diameter, tooth pitch and number of teeth and are coaxially arranged. The first gear 100 includes a plurality of first teeth 110, and the second gear 200 includes a plurality of second teeth 210, and the first teeth 110 correspond to the second teeth 210 one by one; the third gear 300 includes a plurality of third teeth 310, and a tooth groove 320 is provided between two adjacent third teeth 310. The adjustment component 400 is used to stagger the first teeth 110 and the second teeth 210 so that the first teeth 110 abut against one side of the tooth groove 320, and the second teeth 210 abut against the other side of the tooth groove 320; after adjusting the position of the first tooth 110 relative to the second tooth 210, the fixing component is used to fix the first gear 100 and the second gear 200 coaxially, effectively eliminating the gap generated during the forward and reverse rotation of the gears, thereby reducing the backlash and improving the transmission accuracy and transmission reliability.

[0041] Alternatively, if Figure 4-Figure 5 As shown, the adjustment component 400 includes a ball 410 and an adjustment screw 420. An arc groove 120 is provided on the side of the first gear 100 facing the second gear 200. At least one ball 410 is arranged in the arc groove 120. A tapered portion 421 is provided at one end of the adjustment screw 420. The adjustment screw 420 is penetrated by the second gear 200 and is threadedly connected with the second gear 200. At least part of the tapered portion 421 is inserted in the arc groove 120 and abuts against the ball 410. As the adjustment screw 420 is screwed in, the tapered portion 421 at the front end of the adjustment screw 420 pushes the first gear 100 to rotate relative to the second gear 200 through the ball 410, so that the first tooth 110 abuts against one side of the tooth groove 320, and the second tooth 210 abuts against the other side of the tooth groove 320. After the adjustment is completed, the first gear 100 and the second gear 200 can be coaxially fixed by the fastening component, so that the backlash can be reduced or eliminated during the gear transmission process to improve the transmission accuracy.

[0042] Alternatively, if Figure 5 As shown, the second gear 200 is provided with a first threaded hole 220 , and the adjusting screw 420 is passed through the first threaded hole 220 and is threadedly connected to the second gear 200 , thereby making the installation and adjustment process of the adjusting assembly 400 more convenient and efficient.

[0043] Optionally, two balls 410 are disposed in the arc groove 120, and the conical portion 421 drives the first gear 100 to rotate relative to the second gear 200 through the two balls 410; Figure 5As shown, the two balls 410 are in arc-shaped abutment, and the ball 410 on the left of the two balls 410 is in arc-shaped abutment with the left side wall of the arc-shaped groove 120, and the ball 410 on the right of the two balls 410 is in arc-shaped abutment with the tapered portion 421. Adjustment is performed through the two balls 410 to avoid excessive gear meshing force caused by excessive adjustment force, thereby effectively reducing the wear during gear transmission, extending the service life of the gears, and improving the reliability and durability of the transmission system.

[0044] Optionally, two adjustment components 400 are provided in this embodiment, and the two adjustment components 400 are relatively arranged on the second gear 200 along the radial direction of the second gear 200, which can ensure that the force of the combination of the first gear 100 and the second gear 200 is balanced after the adjustment is completed, thereby enhancing the stability and transmission accuracy of the transmission system.

[0045] Optionally, the ball 410 is made of metal. In this embodiment, the ball 410 is a steel ball. The steel ball has good corrosion resistance and high hardness, thereby ensuring the reliability and durability of the transmission device.

[0046] Alternatively, if Figure 3 As shown, the fixing assembly includes a fastening screw 510, a second threaded hole is provided on the first gear 100, and an arc-shaped hole 230 is provided on the second gear 200 corresponding to the second threaded hole. The fastening screw 510 is sequentially inserted into the arc-shaped hole 230 and the second threaded hole, and the nail head of the fastening screw 510 abuts against the side of the second gear 200 away from the first gear 100, and the fastening screw 510 is threadedly connected with the first gear 100. During the adjustment process, the cooperation between the arc-shaped hole 230 and the fastening screw 510 can provide a guiding effect on the rotation of the first gear 100, and after the adjustment is in place, the first gear 100 and the second gear 200 can be coaxially fixed by directly tightening the fastening screw 510.

[0047] Optionally, a gasket is provided between the nail cap of the fastening screw 510 and the second gear 200 . The provision of the gasket can increase the contact area between the fastener and the second gear 200 , thereby increasing the fastening force and preventing the fastening screw 510 from loosening.

[0048] In this embodiment, a plurality of arc holes 230 are provided on the second gear 200 at intervals along the circumferential direction of the second gear 200, and a plurality of second threaded holes are provided on the first gear 100 at intervals along the circumferential direction of the first gear 100. The first threaded holes 220 correspond one-to-one to the first arc holes 230. The fixing assembly includes a plurality of fastening screws 510. Each fastening screw 510 is passed through an arc hole 230 and a threaded hole and is threadedly connected to the first gear 100. The first gear 100 and the second gear 200 are coaxially fixed by the plurality of fastening screws 510, thereby ensuring that the relative position of the first gear 100 and the second gear 200 is more stable, thereby improving the stability of the gear transmission system.

[0049] Optionally, one of the first gear 100 and the second gear 200 is provided with an annular groove, and the rotation axis of the annular groove is coaxial with the rotation axis of the first gear 100, and the other of the first gear 100 and the second gear 200 is provided with an annular protrusion, which is inserted into the annular groove, thereby ensuring that the first gear 100 and the second gear 200 are concentric and coaxial when assembled, which not only improves the accuracy and stability of the transmission device, but also simplifies the installation process and improves the installation efficiency.

[0050] Optionally, the depth of the tooth groove matches the height of the first tooth 110 and the second tooth 210, ensuring that the gears can mesh accurately during the meshing process and avoiding over-meshing or under-meshing, thereby improving the accuracy and efficiency of the transmission system.

[0051] Optionally, a plurality of mounting holes are provided on the third gear 300 along the circumferential direction of the third gear 300 , which can make the third gear 300 more secure during installation and avoid transmission failures caused by looseness during operation, while also facilitating disassembly, assembly and maintenance of the third gear 300 .

[0052] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A transmission device, characterized in that: include: A first gear (100) and a second gear (200), wherein the first gear (100) and the second gear (200) have the same pitch circle diameter, tooth pitch and number of teeth and are coaxially arranged, the first gear (100) comprises a plurality of first teeth (110), the second gear (200) comprises a plurality of second teeth (210), and the first teeth (110) correspond to the second teeth (210) in a one-to-one manner; A third gear (300) comprising a plurality of third teeth (310), wherein a tooth groove (320) is provided between two adjacent third teeth (310); an adjustment component (400) for staggering the first tooth (110) and the second tooth (210) so that the first tooth (110) abuts against one side of the tooth groove (320) and the second tooth (210) abuts against the other side of the tooth groove (320); A fixing assembly is used to fix the first gear (100) and the second gear (200) coaxially after adjusting the position of the first tooth (110) relative to the second tooth (210).

2. The transmission device according to claim 1, characterized in that: The adjustment component (400) comprises: A ball (410), an arc groove (120) is provided on a side of the first gear (100) facing the second gear (200), and at least one ball (410) is arranged in the arc groove (120); An adjusting screw (420), one end of which is provided with a tapered portion (421), the adjusting screw (420) is passed through the second gear (200) and is threadedly connected to the second gear (200), at least a portion of the tapered portion (421) is inserted into the arc groove (120) and abuts against the ball (410), so that the first gear (100) rotates relative to the second gear (200).

3. The transmission device according to claim 2, characterized in that: The second gear (200) is provided with a first threaded hole (220), and the adjusting screw (420) is passed through the first threaded hole (220) and is threadedly connected to the second gear (200).

4. The transmission device according to claim 2, characterized in that: Two balls (410) are arranged in the arc groove (120), and the conical portion (421) drives the first gear (100) to rotate relative to the second gear (200) through the two balls (410).

5. The transmission device according to claim 4, characterized in that: The ball (410) is made of metal.

6. The transmission device according to claim 1, characterized in that: The fixing assembly comprises a fastening screw (510), a second threaded hole is provided on the first gear (100), an arc-shaped hole (230) is provided on the second gear (200) corresponding to the second threaded hole, the fastening screw (510) is sequentially passed through the arc-shaped hole (230) and the second threaded hole, the nail head of the fastening screw (510) abuts against a side of the second gear (200) away from the first gear (100), and the fastening screw (510) is threadedly connected to the first gear (100).

7. The transmission device according to claim 6, characterized in that: A gasket is provided between the nail cap of the fastening screw (510) and the second gear (200).

8. The transmission device according to claim 1, characterized in that: One of the first gear (100) and the second gear (200) is provided with an annular groove, the rotation axis of the annular groove is coaxial with the rotation axis of the first gear (100), and the other of the first gear (100) and the second gear (200) is provided with an annular protrusion, and the annular protrusion is inserted into the annular groove.

9. The transmission device according to claim 1, characterized in that: The depth of the tooth groove matches the height of the first tooth (110) and the second tooth (210).

10. The transmission device according to claim 1, characterized in that: A plurality of mounting holes are provided on the third gear (300) along the circumferential direction of the third gear (300).