CN209875891U - Double-gear backlash eliminating device - Google Patents
Double-gear backlash eliminating device Download PDFInfo
- Publication number
- CN209875891U CN209875891U CN201920628452.2U CN201920628452U CN209875891U CN 209875891 U CN209875891 U CN 209875891U CN 201920628452 U CN201920628452 U CN 201920628452U CN 209875891 U CN209875891 U CN 209875891U
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- Prior art keywords
- gear
- assembly
- compensating
- driving gear
- backlash
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- 230000005540 biological transmission Effects 0.000 claims abstract description 55
- 230000009977 dual effect Effects 0.000 claims 6
- 238000009434 installation Methods 0.000 abstract description 8
- 238000003754 machining Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000008602 contraction Effects 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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- Gears, Cams (AREA)
- Gear Transmission (AREA)
Abstract
The utility model provides a double gear gap eliminating device, including axle subassembly, gear assembly and gap eliminating assembly, the fixed cover of gear assembly is located on the axle subassembly, and on the gap eliminating assembly was fixed in the gear assembly, the gear assembly included driving gear and compensating gear, and the same and gear thickness of the modulus of driving gear and compensating gear was the same, and on the driving gear was located to the compensating gear cover, was clearance fit between compensating gear and the driving gear. The utility model discloses a take-up spring among the anti-backlash subassembly makes the teeth of a cogwheel of the meshing part of external connection gear press from both sides and establishes between the teeth of a cogwheel on compensation gear and driving gear, eliminates the backlash from this and guarantees the machining precision. In addition, when the gears are deformed due to heating or the meshing effect is poor due to machining and installation errors, the tensioning spring can adjust the meshing space between the gears to the best by means of self expansion and contraction, the stability of gear transmission can be guaranteed, and the requirement on the machining precision of the externally connected gears is reduced, so that the practicability is improved.
Description
Technical Field
The utility model relates to a gear school crack equipment field especially relates to a double gear gap eliminating device.
Background
The gear transmission has the characteristics of high transmission efficiency, stable operation and high precision in one-way transmission, and is widely applied to various mechanical systems and equipment as a main transmission mode. In the transmission process of the mechanism, no matter the gear transmission mechanism or the worm gear transmission mechanism has a transmission pair backlash, the backlash is used for preventing the gear from being locked due to errors and thermal deformation, and a space is reserved for a lubricating oil film between tooth surfaces. However, the backlash can cause the gear to have idle stroke when the return stroke is reversed, and the motion stroke of the mechanism cannot be accurately positioned due to the idle stroke. Therefore, in some high-precision automation equipment which needs to transmit accurate angle information and accurate position information, a transmission device which can eliminate backlash of a transmission pair is needed to eliminate backlash so as to avoid errors in equipment machining and further improve the machining progress.
The existing double-gear anti-backlash device adopts the mutual staggered installation of two groups of gears to eliminate the clearance between gear teeth, but the two groups of gears are completely fastened and can not rotate mutually, so that the two groups of gears which are mutually staggered installation are not fixed and unchanged in a new meshing space formed between two groups of corresponding gear teeth, and the requirement on the processing precision of the external gear meshed with the anti-backlash structure is extremely strict, thereby increasing the manufacturing and using cost of the overall equipment; meanwhile, the gears meshed with each other in the long-time work of the equipment deform due to heating, so that the condition that the transmission is unstable when the anti-backlash gear and the external gear are meshed for transmission is caused, and the processing precision is reduced.
Disclosure of Invention
The to-be-solved problem of the utility model is to provide a simple structure practicality is stronger and can eliminate double gear school crack device of gear drive backlash.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a double gear gap eliminating device, includes axle subassembly, gear assembly and gap eliminating assembly, the fixed cover of gear assembly is located on the axle subassembly, the gap eliminating assembly is fixed in on the gear assembly, the gear assembly includes driving gear and compensating gear, the modulus of driving gear and compensating gear is the same and the thickness of gear is the same, the compensating gear cover is located on the driving gear, be clearance fit between compensating gear and the driving gear, the gap eliminating assembly includes fastening stud, tension spring, regulation support and adjusting bolt, fastening stud is fixed to be set up on the driving gear, it sets up on compensating gear to adjust the support fixed, adjusting bolt locates on adjusting the support soon, tension spring's both ends are overlapped respectively and are established and are fixed in between fastening stud and the adjusting bolt.
Furthermore, a plurality of groups of threaded holes and clamping holes are uniformly formed in the driving gear, a convex sleeve is integrally formed on one side wall surface of the driving gear, and the fastening stud is fixedly and rotatably arranged in the threaded hole.
Further, the compensation gear sleeve is arranged on the convex sleeve, adjusting holes are uniformly distributed on the compensation gear, the diameter of each adjusting hole is larger than that of each fastening stud, and the adjusting supports are fixedly arranged on one side wall surface of the compensation gear.
Further, the axle subassembly includes transmission shaft and spacing axle sleeve, spacing axle sleeve rotates the cover and locates on the transmission shaft, a side tip integrated into one piece of transmission shaft has the fender dish, be fixed with the multiunit joint round pin on the fender dish.
Further, the transmission shaft penetrates through the convex sleeve of the driving gear, the transmission shaft is in transmission connection with the driving gear through a key, and the clamping pin is matched with the clamping hole in penetrating mode.
Furthermore, the limiting shaft sleeve is sleeved on the transmission shaft, and a gap is formed between the mounting end part on one side of the limiting shaft sleeve and the side wall surface of the compensation gear.
Further, the tension spring is always in a stretched state.
The utility model has the advantages and positive effects that: the utility model discloses a rotate the cover on the transmission shaft and be equipped with compensation gear and driving gear that modulus and tooth thickness are the same, and fixed setting gap subassembly that disappears between compensation gear and driving gear, make the teeth of a cogwheel of the meshing part of external connection gear press from both sides between the teeth of a cogwheel on compensation gear and driving gear through the straining spring among the gap subassembly that disappears, eliminate the backlash from this, thereby can guarantee that idle stroke improve equipment's transmission precision can not appear when reversing, and then guaranteed the machining precision.
In addition, the tensioning force of the spring is used for ensuring that two sets of corresponding gear teeth of the compensating gear and the driving gear are always clamped on two sides of the gear teeth of the external connection gear, when the gear is deformed due to heating or the meshing effect is poor due to the processing installation error, the tensioning spring has certain elasticity, so the tensioning spring depends on the self telescopic space adjustment formed by the compensating gear and the driving gear teeth of the gear and meshed with the gear teeth of the external connection gear to be optimal, the stability during gear transmission is ensured, the processing precision requirement on the external connection gear is also reduced simultaneously, and the practicability is improved.
Drawings
Fig. 1 is a schematic view of the exploded structure of the present invention.
Fig. 2 is a schematic view of the overall structure of the middle anti-backlash assembly of the present invention.
Fig. 3 is a left side view of the present invention.
Fig. 4 is a left partial sectional view of the present invention.
Fig. 5 is a gear tooth meshing schematic diagram in the gear transmission of the backlash-free structure.
Fig. 6 is a schematic view of gear teeth meshing in gear transmission with an anti-backlash structure.
In the figure: the gear assembly comprises a shaft assembly 1, a transmission shaft 11, a blocking disc 111, a clamping pin 112, a limiting shaft sleeve 12, an installation end portion 121, a gear assembly 2, a driving gear 21, a threaded hole 211, a clamping hole 212, a convex sleeve 213, a compensating gear 22, an adjusting hole 221, a gap eliminating assembly 3, a fastening stud 31, an adjusting support 32, an adjusting bolt 33, a tensioning spring 34 and an external connecting gear 4.
Detailed Description
For a better understanding of the present invention, the following further description is given in conjunction with the following embodiments and accompanying drawings.
As shown in fig. 1 to 6, a double-gear backlash eliminating device comprises a shaft assembly 1, a gear assembly 2 and a backlash eliminating assembly 3, wherein the gear assembly 2 is fixedly sleeved on the shaft assembly 1 through key fit, the backlash eliminating assembly 3 is fixed on the gear assembly 2 through thread fit and screw fixation, the gear assembly 2 comprises a driving gear 21 and a compensating gear 22, the driving gear 21 and the compensating gear 22 have the same module and the same thickness, the compensating gear 22 is sleeved on the driving gear 21, the compensating gear 22 and the driving gear 21 are in clearance fit, the compensating gear 22 and the driving gear 21 can rotate relatively, the backlash eliminating assembly 3 comprises a fastening stud 31, a tension spring 34, an adjusting support 32 and an adjusting bolt 33, the fastening stud 31 is fixedly screwed on the driving gear 21, the adjusting support 32 is fixed on the compensating gear 22 through a screw, the adjusting bolt 33 is screwed on the adjusting support 32, the two ends of the tension spring 34 are respectively hooked and fixed on the fastening stud 31 and the adjusting bolt 33. The teeth of the compensating gear 22 and the driving gear 21 are simultaneously attached to the two sides of the teeth of the external connecting gear 4 by the tension force of the tension spring 34, so that the tooth surfaces of a set of gears and the tooth surfaces of the external connecting gear 4 are attached to each other no matter the transmission shaft 11 performs forward rotation transmission or return rotation, and therefore the backlash between the gears can be eliminated by the structural design, and the transmission precision can be improved, so that the processing precision of the equipment is improved. Simultaneously when the produced meshing effect of meshing gear owing to generate heat and warp or processing installation error is not good, because tensioning spring 34 has the flexible of certain elasticity so tensioning spring 34 can be with compensation gear 22 and the forming of driving gear 21 teeth of a cogwheel with the 4 teeth of a cogwheel joggled space modulation of external connection gear to best stability when having guaranteed gear drive, also reduced the machining precision requirement to external connection gear 4 simultaneously, improve the utility model discloses a practicality.
The driving gear 21 is uniformly provided with a plurality of groups of threaded holes 211 and clamping holes 212, a convex sleeve 213 is integrally formed on one side wall surface of the driving gear 21, and the fastening stud 31 is fixedly screwed in the threaded holes 211. The boss 213 is used for sleeving the compensation gear 22, and a key slot is formed in the boss 213, so that the transmission shaft 11 and the driving gear 21 can be connected together by placing a key in the key slot.
The compensation gear 22 is sleeved on the convex sleeve 213, the compensation gear 22 is uniformly provided with adjusting holes 221, the diameter of each adjusting hole 221 is larger than that of the fastening stud 31, and the multiple groups of adjusting supports 32 are all fixedly arranged on one side wall surface of the compensation gear 22 through screws. When the compensating gear 22 and the driving gear 21 are engaged with the external connection gear 4, in order to allow the gear teeth of the engaging portion of the external connection gear 4 to be interposed between the gear teeth of the compensating gear 22 and the driving gear 21, the compensating gear 22 and the driving gear 21 need to be rotated by a predetermined angle with respect to each other, and the diameter of the adjusting hole 221 is larger than the diameter of the fastening stud 31 so that the fastening stud 31 screwed to the driving gear 21 does not interfere with the compensating gear 22 when the compensating gear 22 and the driving gear 21 are rotated by a predetermined angle with respect to each other.
The shaft assembly 1 comprises a transmission shaft 11 and a limiting shaft sleeve 12, the limiting shaft sleeve 12 is rotatably sleeved on the transmission shaft 11 through a bearing, a blocking disc 111 is integrally formed at the end part of one side of the transmission shaft 11, and a plurality of groups of clamping pins 112 are integrally formed on the blocking disc 111. The transmission shaft 11 is used for being connected with an external motor and the transmission shaft 11 is connected with the driving gear 21, the power of the external motor is transmitted to the driving gear 21, the limiting shaft sleeve 12 is used for being installed and connected with external equipment, and the compensating gear 22 can be limited to a certain extent and is prevented from being separated from the convex sleeve 213 of the driving gear 21.
The transmission shaft 11 is inserted into the convex sleeve 213 of the driving gear 21, the transmission shaft 11 is connected with the driving gear 21 through key transmission, and the latch pin 112 is inserted into the latch hole 212 in a matching manner. The driving gear 21 is fixed on the transmission shaft 11 through the joint and cooperation of a key and a snap pin 112.
The limit shaft sleeve 12 is rotatably sleeved on the transmission shaft 11 through a bearing, and a gap is provided between the mounting end 121 on one side of the limit shaft sleeve 12 and the side wall surface of the compensation gear 22. The mounting end portion 121 is provided with a plurality of sets of threaded holes 211, the threaded holes 211 are used for mounting the limit shaft sleeve 12 on external equipment, a gap is arranged between the mounting end portion 121 and the side wall surface of the compensating gear 22, so that friction between the compensating gear 22 and the mounting end portion 121 during rotation can be prevented, and after mounting, lubricating grease is coated between the mounting end portion 121 and the side wall surface of the compensating gear 22.
The tension spring 34 is always in tension. The teeth of the meshing part of the driving gear 21 and the compensating gear 22 with the external connecting gear 4 can be simultaneously attached to both sides of the teeth of the external connecting gear 4 by the tensile force of the spring. Meanwhile, the tension spring 34 is used to have a tension force during operation greater than the torsion force generated by the transmission shaft 11 during the reverse rotation of the gear, so as to ensure that the teeth of the meshing part of the compensating gear 22 and the driving gear 21 are respectively attached to two sides of the teeth of the external connecting gear 4 during the transmission of the transmission shaft 11. Therefore, errors caused by gear tooth backlash in the transmission process can be eliminated. The alternative method of tensioning spring 34 is well known in the art and will not be described in detail herein. The magnitude of the tension spring 34 can also be adjusted by adjusting the depth of the screw 33 screwed into the adjusting support 32.
The utility model discloses a concrete working process as follows: firstly, the worker puts the compensation gear 22 on the boss 213 of the driving gear 21, and then puts the transmission shaft 11 into the boss 213 and connects the two through a key, and the worker needs to ensure that the snap pins 112 all penetrate into the snap holes 212. Then, the compensation gear 22 is rotated to align the adjusting hole 221 on the compensation gear with the threaded hole 211 on the driving gear 21, then a plurality of sets of fastening studs 31 are screwed and fixed in the corresponding threaded holes 211, then the adjusting support 32 is fixed on the surface of the compensation gear 22 through screws, the adjusting bolt 33 is screwed into the adjusting support 32, finally the tension spring 34 is hooked between each set of fastening studs 31 and the adjusting bolt 33, then the limit shaft sleeve 12 is installed on an external device, the installation end part 121 is fixed through screws, the transmission shaft 11 is penetrated into the limit shaft sleeve 12 and connected with the motor through a coupler, lubricating grease is coated between the installation end part 121 and the compensation gear 22, then the compensation gear 22 and the driving gear 21 are rotated to respectively make the gear teeth of the meshing part of the compensation gear 22 and the driving gear 21 respectively fit with the two sides of the gear teeth of the external connection gear 4, then the adjusting bolts 33 are screwed to ensure that the tightening force of the groups of tightening springs 34 is larger than the maximum torsion force generated when the transmission shaft 11 rotates reversely, so that the transmission clearance between the gears can be eliminated.
The embodiments of the present invention have been described in detail, but the present invention is only the preferred embodiments of the present invention, and the present invention is not to be considered as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.
Claims (7)
1. A double-gear backlash eliminating device is characterized in that: the double-gear backlash eliminating device comprises a shaft assembly (1), a gear assembly (2) and a backlash eliminating assembly (3), wherein the gear assembly (2) is fixedly sleeved on the shaft assembly (1), the backlash eliminating assembly (3) is fixed on the gear assembly (2), the gear assembly (2) comprises a driving gear (21) and a compensating gear (22), the driving gear (21) and the compensating gear (22) have the same modules and the same thickness, the compensating gear (22) is sleeved on the driving gear (21), the compensating gear (22) is in clearance fit with the driving gear (21), the backlash eliminating assembly (3) comprises a fastening stud (31), a tension spring (34), an adjusting support (32) and an adjusting bolt (33), the fastening stud (31) is fixedly arranged on the driving gear (21), the adjusting support (32) is fixedly arranged on the compensating gear (22), the adjusting bolt (33) is arranged on the adjusting support (32) in a rotating mode, and two ends of the tensioning spring (34) are respectively sleeved and fixed between the fastening stud (31) and the adjusting bolt (33).
2. A dual gear anti-backlash device according to claim 1, wherein: the driving gear (21) is uniformly provided with a plurality of groups of threaded holes (211) and clamping holes (212), a convex sleeve (213) is integrally formed on one side wall surface of the driving gear (21), and the fastening stud (31) is fixedly and rotatably arranged in the threaded hole (211).
3. A dual gear anti-backlash device according to claim 2, wherein: the compensating gear (22) cover is located on protruding cover (213), regulation hole (221) have been seted up to the equipartition on compensating gear (22), the diameter of regulation hole (221) is greater than the diameter of fastening stud (31), the multiunit adjust that support (32) all fixed set up on one lateral wall face of compensating gear (22).
4. A dual gear anti-backlash device according to claim 2, wherein: the shaft subassembly (1) includes transmission shaft (11) and spacing axle sleeve (12), spacing axle sleeve (12) rotate the cover and locate on transmission shaft (11), one side tip integrated into one piece of transmission shaft (11) has fender dish (111), be fixed with multiunit joint round pin (112) on fender dish (111).
5. A dual gear anti-backlash device according to claim 4, wherein: the transmission shaft (11) penetrates through a convex sleeve (213) of the driving gear (21), the transmission shaft (11) is in transmission connection with the driving gear (21) through a key, and the clamping pin (112) is matched and penetrates through the clamping hole (212).
6. A dual gear anti-backlash device according to claim 4, wherein: the limiting shaft sleeve (12) is sleeved on the transmission shaft (11), and a gap is formed between the mounting end part (121) on one side of the limiting shaft sleeve (12) and the side wall surface of the compensating gear (22).
7. A dual gear anti-backlash device according to claim 1, wherein: the tension spring (34) is always in tension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920628452.2U CN209875891U (en) | 2019-05-05 | 2019-05-05 | Double-gear backlash eliminating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920628452.2U CN209875891U (en) | 2019-05-05 | 2019-05-05 | Double-gear backlash eliminating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209875891U true CN209875891U (en) | 2019-12-31 |
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ID=68963666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920628452.2U Expired - Fee Related CN209875891U (en) | 2019-05-05 | 2019-05-05 | Double-gear backlash eliminating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209875891U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542686A (en) * | 2022-02-16 | 2022-05-27 | 容德精机（江苏）机床有限公司 | Cylindrical gear transmission device with single screw for adjusting tooth side clearance |
-
2019
- 2019-05-05 CN CN201920628452.2U patent/CN209875891U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542686A (en) * | 2022-02-16 | 2022-05-27 | 容德精机（江苏）机床有限公司 | Cylindrical gear transmission device with single screw for adjusting tooth side clearance |
| CN114542686B (en) * | 2022-02-16 | 2023-10-13 | 容德精机（江苏）机床有限公司 | Cylindrical gear transmission device with single screw for adjusting tooth side gap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |