CN215763221U - Zero back clearance transmission of eccentric fine setting - Google Patents
Zero back clearance transmission of eccentric fine setting Download PDFInfo
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- CN215763221U CN215763221U CN202121125321.6U CN202121125321U CN215763221U CN 215763221 U CN215763221 U CN 215763221U CN 202121125321 U CN202121125321 U CN 202121125321U CN 215763221 U CN215763221 U CN 215763221U
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Abstract
The utility model discloses an eccentric fine adjustment zero-backlash transmission device which comprises a shaft seat and a transmission assembly, wherein the shaft seat is provided with a shaft hole along the axial direction, the shaft hole and the shaft seat are eccentrically arranged, the transmission assembly comprises a support and a transmission piece, the support is rotatably connected with the shaft seat, one end of the support is connected with the transmission piece, the other end of the support penetrates through the shaft hole, the support and the shaft hole are coaxially arranged, and the transmission piece and the support are coaxially arranged. The eccentric fine-adjustment zero-backlash transmission device has the advantages that the transmission piece and the shaft seat are arranged eccentrically, the central shaft of the transmission piece is parallel to and does not coincide with the central shaft of the shaft seat, and an eccentric distance exists; when the transmission mechanism is connected with an external power element, one end of the support, which is far away from the transmission part, is connected with the output end of the power element by taking the central shaft of the shaft seat as a reference, namely the support and the transmission part rotate by taking the central shaft of the shaft seat, and the center distance between the transmission part and the gear meshed with the external part is changed by slightly adjusting the position of the shaft seat, so that the adjustment of a transmission gap is realized, and zero backlash transmission is achieved.
Description
Technical Field
The utility model relates to the technical field of transmission devices, in particular to an eccentric fine-tuning zero backlash transmission device.
Background
The transmission is an intermediate device that transmits the motion and power of the prime mover to the working mechanism. Common transmission mechanisms include gear transmission devices, belt transmission devices, couplings, and the like. In the gear transmission device, certain errors can be caused due to machining precision of the gear and errors in assembly, so that the gear transmission device has large back clearance, the precision is reduced, the noise is increased in transmission, and the service life of the device is shortened.
Backlash refers to a performance parameter of the transmission. Backlash in the transmission, i.e. return clearance: the input end is fixed, and the output end rotates clockwise and anticlockwise, so that when the output end generates rated torque of plus or minus 2%, the output end of the transmission device has a small angular displacement, which is a return gap, and the unit is arc division arcmin, which is one sixtieth of one degree. The return clearance (or backlash, clearance) in the performance parameters of the transmission is better and more expensive as the value is lower (in arcmin, generally called high precision below 3 and low precision above 15).
In view of the above, the present invention provides an eccentric fine-tuning zero backlash transmission device to solve the above-mentioned drawbacks.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an eccentric fine-adjustment zero-backlash transmission device which has the characteristics of simple structure and high transmission precision and overcomes the defects in the prior art.
In order to achieve the above purpose, the utility model provides the following technical scheme:
the utility model provides a zero back clearance transmission of eccentric fine setting, includes axle bed and drive assembly, the axle bed has seted up the shaft hole along axial direction, the shaft hole with the axle bed eccentric settings, drive assembly includes support and driving medium, the support with axle bed swivelling joint, the one end of support with the driving medium is connected, and the other end wears to establish the shaft hole, the support with the coaxial setting in shaft hole, the driving medium with the coaxial setting of support.
In one embodiment, the transmission member is a roller.
In one embodiment, the transmission assembly further includes a bearing, the bracket is sleeved with the bearing, and the shaft seat is disposed in the bearing.
In one embodiment, the bearing is a tapered roller bearing.
In one embodiment, the number of the bearings is two, and two bearings are sleeved on the bracket in a spacing manner.
In one embodiment, the transmission assembly further comprises a lock nut, the lock nut is arranged on one side, away from the transmission piece, of the bearing, and the lock nut is in threaded connection with the support.
In one embodiment, the transmission assembly further includes a locking sleeve disposed at an end of the bracket away from the transmission member.
In one embodiment, the axle seat is cylindrical in outline.
In one embodiment, the eccentric fine-tuning zero-backlash transmission device further comprises a connecting seat and a flange seat, wherein the connecting seat is arranged at one end of the shaft seat far away from the transmission part, and the flange seat is arranged at one end of the connecting seat far away from the shaft seat.
In one embodiment, the shaft seat is coaxially arranged with the connecting seat.
Compared with the prior art, the utility model has the following beneficial effects:
the eccentric fine-adjustment zero-backlash transmission device has the characteristics of simple structure and high transmission precision, and an eccentric distance exists by arranging the transmission piece and the shaft seat eccentrically, wherein the central shaft of the transmission piece is parallel to and does not coincide with the central shaft of the shaft seat; when the transmission mechanism is connected with an external power element, one end of the support, which is far away from the transmission part, is connected with the output end of the power element by taking the central shaft of the shaft seat as a reference, namely the support and the transmission part rotate by taking the central shaft of the shaft seat, and the center distance between the transmission part and the gear meshed with the external part is changed by slightly adjusting the position of the shaft seat, so that the adjustment of a transmission gap is realized, and zero backlash transmission is achieved.
Drawings
FIG. 1 is a schematic diagram of an eccentric fine-tuning zero backlash actuator according to a preferred embodiment of the present invention;
FIG. 2 is a cross-sectional view of the eccentric fine-tuned zero backlash drive of FIG. 1 taken along line A-A.
Reference is made to the accompanying drawings in which:
an eccentric vernier zero backlash drive 100;
a shaft seat 10 and a shaft hole 101; the transmission assembly 20, the bracket 21, the transmission piece 22, the bearing 23, the lock nut 24, the oil seal 25 and the locking sleeve 26; a connecting base 30; a flange seat 40.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When the number of an element is referred to as "a plurality," it can be any number of two or more. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model will be described in detail with reference to embodiments shown in the drawings, in which:
as shown in fig. 1 and fig. 2, an eccentric fine-tuning zero backlash transmission device 100 according to a preferred embodiment of the present invention includes a shaft seat 10 and a transmission assembly 20, the shaft seat 10 has a shaft hole 101 along an axial direction, the shaft hole 101 is eccentrically disposed with the shaft seat 10, the transmission assembly 20 includes a bracket 21 and a transmission member 22, the bracket 21 is rotatably connected with the shaft seat 10, one end of the bracket 21 is connected with the transmission member 22, the other end of the bracket 21 penetrates through the shaft hole 101, the bracket 21 and the shaft hole 101 are coaxially disposed, and the transmission member 22 and the bracket 21 are coaxially disposed. The eccentric fine-adjustment zero-backlash transmission device 100 has the characteristics of simple structure and high transmission precision, and the transmission piece 22 and the shaft seat 10 are eccentrically arranged, so that the central shaft of the transmission piece 22 is parallel to and does not coincide with the central shaft of the shaft seat 10, and an eccentric distance exists; when the transmission mechanism is connected with an external power element, one end of the support 21, which is far away from the transmission piece 22, is connected with the output end of the power element by taking the central shaft of the shaft seat 10 as a reference, which is equivalent to that the support 21 and the transmission piece 22 rotate by the central shaft of the shaft seat 10, and the center distance between the transmission piece 22 and the external gear meshed with the transmission piece 22 is changed by slightly adjusting the position of the shaft seat 10, so that the adjustment of a transmission gap is realized, and zero backlash transmission is achieved.
Referring to fig. 1 and 2, the shaft seat 10 is provided with a shaft hole 101 along an axial direction, the shaft hole 101 penetrates through the shaft seat 10, and the shaft hole 101 and the shaft seat 10 are eccentrically arranged. In this embodiment, the outline of the shaft seat 10 is a cylinder, in other embodiments, the shape of the shaft seat 10 may be other shapes, but the central axis of the shaft hole 101 is parallel to the central axis of the shaft seat 10 and does not coincide with the central axis.
Referring to fig. 1 and 2, the transmission assembly 20 includes a bracket 21 and a transmission member 22, the bracket 21 is provided with a through hole along an axial direction, and the through hole can reduce the weight of the bracket 21 and the weight thereof. Support 21 and axle bed 10 swivelling joint, the one end and the driving medium 22 of support 21 are connected, and the shaft hole 101 is worn to establish by the other end, and support 21 and shaft hole 101 coaxial setting, driving medium 22 and the coaxial setting of support 21, driving medium 22 and outside gear or rack toothing for transmission power. Optionally, the driving member 22 is a roller, because the roller is assembled by a roller frame and a certain number of rollers, each roller is arranged at intervals along the circumferential direction of the roller frame, and each roller is rotatably connected with the roller frame, when the roller is engaged with an external gear or rack, the roller rolls on the tooth surface of the gear or rack, thereby greatly reducing friction during engagement, improving engagement precision, and reducing abrasion. Further, a plurality of telescopic grooves (not shown) are formed in the side wall of one end, away from the transmission part 22, of the support 21, each telescopic groove extends along the axial direction of the support 21, the telescopic grooves are distributed along the circumferential direction of the support 21 at intervals, and the support can elastically deform due to the telescopic grooves, so that the holding force when the support 21 is connected with the output end of an external power element is enhanced, and the connection is more reliable. During connection, the output end of an external power element is inserted into the through hole of the support 21, and then the bolt on the locking sleeve 26 is screwed down, so that the side wall of the support 21 can tightly hold the output end of the external power element, transmission is more efficient, and connection is firmer and more reliable.
As shown in fig. 2, the transmission assembly 20 further includes a bearing 23, the bearing 23 is sleeved on the bracket 21, the bearing 23 is disposed inside the shaft seat 10, and the bearing 23 can reduce the friction between the bracket 21 and the shaft seat 10. Further, the bearing 23 is a tapered roller bearing, because the tapered roller bearing is mainly used for bearing radial and axial combined loads mainly based on radial loads, and the tapered roller bearing has large bearing capacity and low limit rotation speed, can bear axial loads in one direction, and can limit axial displacement of the shaft or the housing in one direction. In this embodiment, the number of the bearings 23 is two, the two bearings 23 are disposed on the bracket 21 in a spaced manner, and further, the two bearings 23 are disposed opposite to each other along the axial direction of the bracket 21. Further, the transmission assembly 20 further includes a lock nut 24, the lock nut 24 is disposed on a side of the bearing 23 away from the transmission member 22, the lock nut 24 is in threaded connection with the bracket 21, and the lock nut 24 is used for locking the bearing 23 to prevent the bearing 23 from being disengaged from the bracket 21. Further, a side of the lock nut 24 remote from the bearing 23 is provided with an oil seal 25, and the oil seal 25 is used for preventing leakage of the lubricating oil in the shaft hole 101. Further, the transmission assembly 20 further includes a locking sleeve 26, the locking sleeve 26 is disposed at an end of the support 21 away from the transmission member 22, and the locking sleeve 26 is used for connecting the support 21 with an output end of an external power element.
In this embodiment, the eccentric fine-tuning zero-backlash transmission device 100 further includes a connection seat 30 and a flange seat 40, the connection seat 30 is disposed at an end of the shaft seat 10 away from the transmission member 22, the flange seat 40 is disposed at an end of the connection seat 30 away from the shaft seat 10, and the flange seat 40 is used for connecting the eccentric fine-tuning zero-backlash transmission device 100 with an external power element. Further, the connecting seat 30 and the flange seat 40 are both provided with through inner holes along the axial direction, and the inner holes are used for the support 21 to penetrate through. Further, the connecting seat 30 is connected to the shaft seat 10 by a fastener, and the flange seat 40 is connected to the connecting seat 30 by a fastener, in this embodiment, the fastener is a bolt. Further, the shaft seat 10 is coaxially disposed with the coupling seat 30.
When the transmission device is used, one end of the support 21, which is far away from the transmission piece 22, is connected with the output end of an external power element, then the flange seat 40 is connected with the external power element through a bolt, when the transmission back clearance needs to be adjusted, the center distance between the transmission piece 22 and the external gear meshed with the transmission piece 22 can be changed only by finely adjusting the position of the shaft seat 10, so that the adjustment of the transmission clearance is realized, zero back clearance transmission is achieved, and the transmission device has the characteristics of convenience in adjustment, convenience in use and high transmission precision.
The eccentric fine-adjustment zero-backlash transmission device 100 has the characteristics of simple structure and high transmission precision, and the transmission piece 22 and the shaft seat 10 are eccentrically arranged, so that the central shaft of the transmission piece 22 is parallel to and does not coincide with the central shaft of the shaft seat 10, and an eccentric distance exists; when the transmission mechanism is connected with an external power element, one end of the support 21, which is far away from the transmission piece 22, is connected with the output end of the power element by taking the central shaft of the shaft seat 10 as a reference, which is equivalent to that the support 21 and the transmission piece 22 rotate by the central shaft of the shaft seat 10, and the center distance between the transmission piece 22 and the external gear meshed with the transmission piece 22 is changed by slightly adjusting the position of the shaft seat 10, so that the adjustment of a transmission gap is realized, and zero backlash transmission is achieved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The zero-backlash transmission device with the eccentric fine adjustment function is characterized by comprising a shaft seat and a transmission assembly, wherein the shaft seat is provided with a shaft hole along the axial direction, the shaft hole is eccentrically arranged with the shaft seat, the transmission assembly comprises a support and a transmission piece, the support is rotatably connected with the shaft seat, one end of the support is connected with the transmission piece, the other end of the support penetrates through the shaft hole, the support is coaxially arranged with the shaft hole, and the transmission piece is coaxially arranged with the support.
2. The eccentrically fine-tuned zero backlash drive of claim 1, wherein said drive members are rollers.
3. The eccentrically fine-tuned zero backlash drive of claim 1, wherein said drive assembly further comprises a bearing, said bearing housing said carrier and said bearing housing said shaft seat.
4. The eccentrically fine-tuned zero backlash drive of claim 3, wherein said bearings are tapered roller bearings.
5. The eccentrically fine-tuned zero backlash drive of claim 3, wherein said bearings are two in number and two of said bearings are spaced on said carrier.
6. The eccentrically fine-tuned zero backlash drive of claim 3, wherein said drive assembly further comprises a lock nut disposed on a side of said bearing remote from said drive member, said lock nut being threadably connected to said bracket.
7. The eccentrically fine-tuned zero backlash drive of claim 1, wherein said drive assembly further comprises a locking sleeve disposed at an end of said carrier remote from said drive member.
8. The eccentrically fine-tuned zero backlash drive of claim 1, wherein said axle seat profile is cylindrical.
9. The eccentrically fine-tuned zero backlash drive of claim 1, further comprising a coupling seat disposed at an end of said shaft seat remote from said drive member and a flange seat disposed at an end of said coupling seat remote from said shaft seat.
10. The eccentrically fine-tuned zero backlash drive of claim 9, wherein said shaft receptacle is coaxially disposed with said coupling seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121125321.6U CN215763221U (en) | 2021-05-25 | 2021-05-25 | Zero back clearance transmission of eccentric fine setting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121125321.6U CN215763221U (en) | 2021-05-25 | 2021-05-25 | Zero back clearance transmission of eccentric fine setting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215763221U true CN215763221U (en) | 2022-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121125321.6U Active CN215763221U (en) | 2021-05-25 | 2021-05-25 | Zero back clearance transmission of eccentric fine setting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215763221U (en) |
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2021
- 2021-05-25 CN CN202121125321.6U patent/CN215763221U/en active Active
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