Worm gear structure
By designing a worm gear structure including the main worm gear and the secondary worm gear, the elastic parts make the gear teeth tightly fit, the problem of increasing the return space gap of the worm gear and worm speed reduction mechanism is solved, reducing noise and improving handling accuracy, making it suitable for underwater navigation Use of the device.
Patent Information
- Application Number
- CN202421197012.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-29
AI Technical Summary
The existing worm gear and worm speed reduction mechanism increases after long operation, resulting in noise and control accuracy problems. The existing measures cannot effectively eliminate the return space gap.
Design a worm gear structure, including the main worm gear and the auxiliary worm gear. Through the integrated main body part and annular mounting part, combined with the elastic member, the main worm gear and the auxiliary worm gear rotate relative to each other after the limit is lifted, so that the gear teeth are tightly attached to each other and eliminate the return space. and maintain no return space gap when the external torque is not greater than the torque generated by the elastic member.
It effectively eliminates the space gap of the worm gear and worm structure, reduces underwater noise, improves control accuracy, is simple in structure and small in size, and is suitable for use in various environments and working conditions.
Smart Images
Figure CN222208867U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of underwater vehicles, in particular to a worm gear structure. Background Art
[0002] At present, underwater vehicles are developing towards unmanned and large-scale, which requires the steering gear to be small in size, high in control accuracy, low in noise, high in torque output and self-locking function. Generally, worm gears are used as the last stage of the reduction mechanism.
[0003] The worm gear reduction mechanism has a simple structure, high transmission ratio, large output torque, small space occupation, and self-locking. However, its backlash is large. After a servo with a worm gear reduction mechanism has been running for a long time, the backlash of the servo will also increase due to wear.
[0004] The backlash of the servo will cause the rudder plate connected to it to have a frame position. After the rudder plate is impacted by the water flow, the rudder plate will swing back and forth, causing the worm wheel and the worm to collide and produce underwater noise. It also affects the control accuracy of the servo. Especially for large underwater vehicles with large and long rudder plates, the backlash will cause a large displacement at the end of the rudder plate. This increases the uncertainty of the rudder plate position and has an adverse effect on product noise and servo control.
[0005] In order to reduce the backlash, the current measures taken are to improve the processing accuracy, assembly accuracy or adopt a multi-head worm structure, but the above measures will aggravate the wear of the worm gear and cannot completely eliminate the backlash. After a long period of operation, the backlash still increases, and the purpose of fundamentally eliminating the backlash cannot be achieved.
[0006] There is no effective solution to the problem that the backlash of the worm gear reduction mechanism steering gear cannot be effectively eliminated in the prior art. Utility Model Content
[0007] In order to solve the above problems, the utility model provides a worm gear structure. When the external torque is not greater than the torque generated by the elastic member, the worm gear structure has no backlash and can automatically compensate for the gap caused by the wear of the worm gear after long-term operation, so as to solve the problem in the prior art that the backlash of the worm gear reduction mechanism servo cannot be effectively eliminated.
[0008] To achieve the above-mentioned purpose, the utility model provides a worm gear structure, including: a main worm gear, the main worm gear includes an integrally formed main body and a mounting portion, the mounting portion is annular, protruding from a side plane of the main body, the inner wall of the mounting portion is provided with a tooth pattern, a first through hole is provided at a position corresponding to the inner circle of the main body and the mounting portion, and the tooth pattern extends to the inner wall of the first through hole; a secondary worm gear, the secondary worm gear is provided with a second through hole, the diameter of the second through hole is larger than the diameter of the mounting portion, the mounting portion passes through the second through hole to merge the secondary worm gear with the main worm gear; the main body is provided with a first accommodating hole, a first fixing member is provided in the first accommodating hole, the secondary worm gear is provided with a second accommodating hole corresponding to the first accommodating hole, a second fixing member is provided in the second accommodating hole, and an elastic member is connected between the first fixing member and the second fixing member.
[0009] Further optionally, the elastic member is a spring.
[0010] Further optionally, the first fixing member and the second fixing member are both fixing pins; and the first fixing member and the second fixing member are arranged in parallel.
[0011] Further optionally, a rotation positioning pin is provided at the bottom of the auxiliary worm gear, and the rotation positioning pin penetrates into the second through hole from the bottom of the auxiliary worm gear.
[0012] Further optionally, the auxiliary worm gear is provided with a first positioning hole; the side of the mounting portion is provided with a second positioning hole corresponding to the first positioning hole; the axial positioning pin passes through the first positioning hole and the second positioning hole in sequence to fix the relative positions of the main worm gear and the auxiliary worm gear.
[0013] Further optionally, a first positioning hole is respectively opened on the opposite sides of the auxiliary worm gear; a second positioning hole is respectively opened on the opposite sides of the mounting portion; there are two axial positioning pins, and each axial positioning pin passes through the corresponding first positioning hole and the second positioning hole in sequence to complete the positioning.
[0014] Further optionally, the first positioning hole is an oblong hole; and the second positioning hole is a round hole.
[0015] Further optionally, the thickness of the mounting portion is the same as the thickness of the auxiliary worm gear.
[0016] The above technical scheme has the following beneficial effects: after the worm wheel is assembled on the worm gear reduction structure, under the action of the elastic member, the main worm wheel and the auxiliary worm wheel have a relative rotation, so that the gear teeth of the main worm wheel and the auxiliary worm wheel are close to the gear teeth of the worm, thereby eliminating the backlash; when the external force is not greater than the torque generated by the spring, the worm gear structure has no backlash. After the rudder plate is impacted by the water flow, the underwater noise caused by the collision between the steering gear worm wheel and the worm caused by the back and forth shaking of the rudder plate is reduced, and the control accuracy is improved; and the problem of increased backlash after the worm gear structure of the steering gear works for a long time is solved; the structure is simple, small in size, and the worm wheel is easy to assemble and install, suitable for use in a variety of environments and working conditions. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a structural schematic diagram of the embodiment of the utility model provided by the main worm gear and the auxiliary worm gear after being assembled to eliminate the backlash;
[0019] Figure 2 It is a right isometric view of the main worm gear and the auxiliary worm gear after being decomposed according to an embodiment of the utility model;
[0020] Figure 3 It is a left isometric view of the main worm gear and the auxiliary worm gear after being decomposed provided by an embodiment of the utility model.
[0021] Figure numerals: 1-main worm gear; 101-main body; 102-installation part; 2-secondary worm gear; 3-rotational positioning pin; 4-axial positioning pin; 5-elastic member; 6-first fixing member; 7-second fixing member. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] In order to solve the problem that the prior art cannot effectively eliminate the backlash of the worm gear, the embodiment of the utility model provides a worm gear structure, such as Figure 1 , Figure 2 , Figure 2 As shown, the structure includes: a main worm gear 1, which includes an integrally formed main body 101 and a mounting portion 102, the mounting portion 102 is annular and protrudes from a side plane of the main body 101, the inner wall of the mounting portion 102 is provided with a tooth pattern, a first through hole is provided at a position corresponding to the inner circle of the main body 101 and the mounting portion 102, and the tooth pattern extends to the inner wall of the first through hole; an auxiliary worm gear 2, which is provided with a second through hole, the diameter of the second through hole is larger than the diameter of the mounting portion 102, and the mounting portion 102 passes through the second through hole to merge the auxiliary worm gear 2 with the main worm gear 1; the main body 101 is provided with a first accommodating hole, a first fixing member 6 is provided in the first accommodating hole, the auxiliary worm gear 2 is provided with a second accommodating hole corresponding to the first accommodating hole, a second fixing member 7 is provided in the second accommodating hole, and an elastic member 5 is connected between the first fixing member 6 and the second fixing member 7.
[0024] like Figure 2 As shown, the main worm gear 1 includes an integrally formed main body 101 and a mounting portion 102. The main body 101 can also be roughly divided into two parts, namely, an upper fan-shaped structure and a lower circular structure, the top of the fan-shaped structure is provided with gear teeth, and the fan-shaped structure is also provided with a first accommodating hole, and a first fixing member 6 is fixed to one side of the inner wall of the first accommodating hole.
[0025] The circular structure is provided with a protruding mounting portion 102 in the middle, and the mounting portion 102 is an annular structure, and the inner wall of the annular structure is provided with tooth patterns. The circular structure is also provided with a first through hole corresponding to the inner circle of the mounting portion 102, such as Figure 3 As shown, the tooth pattern of the inner wall of the mounting portion 102 extends to the inner wall of the first through hole. The main worm gear 1 can be assembled to the worm gear reduction mechanism through the mounting portion 102.
[0026] The auxiliary worm gear 2 can be combined with the main worm gear 1 to form an integral worm gear, so the appearance of the auxiliary worm gear 2 is roughly the same as that of the main worm gear 1, that is, the auxiliary worm gear 2 also includes an upper fan-shaped structure and a lower circular structure, and the top of the fan-shaped structure is provided with gear teeth, which correspond to the gear teeth on the top of the main worm gear 1. A second accommodating hole is also provided on the fan-shaped structure, and the second accommodating hole is consistent with the first accommodating hole in size and shape, and the position corresponds. A second fixing member 7 is fixed to one side of the inner wall of the second accommodating hole.
[0027] A second through hole is opened in the middle of the fan-shaped structure of the auxiliary worm gear 2, and the diameter of the second through hole is larger than the diameter of the mounting portion 102. In this way, the middle of the auxiliary worm gear 2 can be sleeved on the outside of the mounting portion 102, so that the auxiliary worm gear 2 and the main worm gear 1 are combined into an integral worm gear.
[0028] An elastic member 5 is provided between the first fixing member 6 and the second fixing member 7. When the main worm gear 1 and the auxiliary worm gear 2 are combined into a whole, the elastic member 5 is stretched, allowing the main worm gear 1 and the auxiliary worm gear 2 to have a relative rotation after the limit is released, so that the gear teeth of the main worm gear 1 and the auxiliary worm gear 2 are closely attached to the gear teeth of the worm, thereby eliminating the backlash. When the external torque is not greater than the torque generated by the elastic member 5, the worm gear structure has no backlash.
[0029] As an optional implementation, the elastic member 5 is a spring.
[0030] like Figure 2 As shown, the elastic member 5 is a spring, one end of which is arranged on the first fixing member 6, and the other end is arranged on the second fixing member 7. When the main worm gear 1 and the auxiliary worm gear 2 are combined together, the spring is stretched. The main worm gear 1 and the auxiliary worm gear 2 rotate relative to each other after the limit is released, so that the gear teeth of the main worm gear 1 and the auxiliary worm gear 2 are closely attached to the gear teeth of the worm, thereby eliminating the backlash.
[0031] As an optional implementation, the first fixing member 6 and the second fixing member 7 are both fixing pins; the first fixing member 6 and the second fixing member 7 are arranged in parallel.
[0032] like Figure 2 As shown, the first fixing member 6 is a fixing pin, one end of which is fixed to one inner wall of the first receiving hole, and the free end extends toward the opposite inner wall, and the free end of the first fixing member 6 is used to connect the elastic member 5. Specifically, one end of the spring is hung on the free end of the first fixing member 6.
[0033] like Figure 3 As shown, the second fixing member 7 is a fixing pin, one end of which is fixed to one inner wall of the second receiving hole, and the free end extends toward the opposite inner wall. It should be noted that the free ends of the first fixing member 6 and the second fixing member 7 extend in opposite directions. The free end of the second fixing member 7 is connected to the elastic member 5, specifically, the other end of the spring is on the free end of the second fixing member 7.
[0034] As an optional implementation, a rotation positioning pin 3 is provided at the bottom of the auxiliary worm gear 2 , and the rotation positioning pin 3 penetrates into the second through hole from the bottom of the auxiliary worm gear 2 .
[0035] like Figure 1 , 2 As shown, a rotation positioning pin 3 is provided at the bottom of the auxiliary worm gear 2, and a hole is punched at the bottom of the auxiliary worm gear 2. The rotation positioning pin 3 can pass through the bottom of the auxiliary worm gear 2 to limit the assembled auxiliary worm gear 2 and the main worm gear 1, that is, to prevent the main worm gear 1 and the auxiliary worm gear 2 from rotating under the action of the elastic member 5.
[0036] After the worm wheel is assembled to the worm gear reduction structure, the rotation positioning pin 3 is pulled out to release the rotation direction limit of the main worm wheel 1 and the auxiliary worm wheel 2. Under the action of the elastic member 5, the main worm wheel 1 and the auxiliary worm wheel 2 have a relative rotation, so that the teeth of the main worm wheel 1 and the auxiliary worm wheel 2 are close to the worm gear teeth.
[0037] As an optional embodiment, the auxiliary worm gear 2 is provided with a first positioning hole; the side of the mounting portion 102 is provided with a second positioning hole corresponding to the first positioning hole; the axial positioning pin 4 passes through the first positioning hole and the second positioning hole in sequence, so as to fix the relative positions of the main worm gear 1 and the auxiliary worm gear 2.
[0038] like Figure 2 As shown, the auxiliary worm gear 2 is provided with a first positioning hole, and the side of the mounting portion 102 is provided with a second positioning hole, the first positioning hole and the second positioning hole are provided correspondingly, and when the auxiliary worm gear 2 is assembled with the main worm gear 1, the axial positioning pin 4 passes through the first positioning hole and the second positioning hole to prevent the main worm gear 1 from being separated from the auxiliary worm gear 2.
[0039] As an optional embodiment, a first positioning hole is respectively opened on the opposite sides of the auxiliary worm gear 2; a second positioning hole is respectively opened on the opposite sides of the mounting portion 102; there are two axial positioning pins 4, and each axial positioning pin 4 passes through the corresponding first positioning hole and the second positioning hole in turn to complete the positioning.
[0040] like Figure 2 As shown, first positioning holes are respectively provided on two opposite sides of the auxiliary worm gear 2, and correspondingly, second positioning holes are also respectively opened on two sides of the mounting portion 102. The stability of the installation of the main worm gear 1 and the auxiliary worm gear 2 is ensured by the cooperation of the two groups of positioning holes and the positioning pins.
[0041] As an optional implementation, the first positioning hole is an oblong hole; and the second positioning hole is a round hole.
[0042] As an optional implementation, the thickness of the mounting portion 102 is the same as the thickness of the auxiliary worm gear 2 .
[0043] The thickness of the mounting portion 102 is the same as that of the auxiliary worm gear 2 , so that after the main worm gear 1 and the auxiliary worm gear 2 are assembled, the mounting portion 102 will not protrude from the surface of the auxiliary worm gear 2 , thereby ensuring the installation integrity of the main worm gear 1 and the auxiliary worm gear 2 .
[0044] The above technical scheme has the following beneficial effects: after the worm wheel is assembled on the worm gear reduction structure, under the action of the elastic member, the main worm wheel and the auxiliary worm wheel have a relative rotation, so that the gear teeth of the main worm wheel and the auxiliary worm wheel are close to the gear teeth of the worm, thereby eliminating the backlash; when the external force is not greater than the torque generated by the spring, the worm gear structure has no backlash. After the rudder plate is impacted by the water flow, the underwater noise caused by the collision between the steering gear worm wheel and the worm caused by the back and forth shaking of the rudder plate is reduced, and the control accuracy is improved; and the problem of increased backlash after the worm gear structure of the steering gear works for a long time is solved; the structure is simple, small in size, and the worm wheel is easy to assemble and install, suitable for use in a variety of environments and working conditions.
[0045] The specific implementation methods of the utility model above further explain in detail the purpose, technical solutions and beneficial effects of the utility model. It should be understood that the above content is only the specific implementation methods of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A worm gear structure, characterized in that: include: A main worm gear, the main worm gear comprising an integrally formed main body and a mounting portion, the mounting portion being annular and protruding from a side plane of the main body, the inner wall of the mounting portion being provided with tooth patterns, a first through hole being provided at a position corresponding to the inner circle of the main body and the mounting portion, the tooth patterns extending to the inner wall of the first through hole; A secondary worm gear, the secondary worm gear is provided with a second through hole, the diameter of the second through hole is larger than the diameter of the mounting portion, and the mounting portion passes through the second through hole so that the secondary worm gear is combined with the primary worm gear; The main body is provided with a first accommodating hole, in which a first fixing member is arranged; the auxiliary worm gear is provided with a second accommodating hole corresponding to the first accommodating hole, in which a second fixing member is arranged; and an elastic member is connected between the first fixing member and the second fixing member.
2. The worm gear structure according to claim 1, characterized in that: The elastic member is a spring.
3. The worm gear structure according to claim 2, characterized in that: The first fixing member and the second fixing member are both fixing pins; The first fixing member is arranged in parallel with the second fixing member.
4. The worm gear structure according to claim 1, characterized in that: A rotation positioning pin is provided at the bottom of the auxiliary worm gear, and the rotation positioning pin penetrates into the second through hole from the bottom of the auxiliary worm gear.
5. The worm gear structure according to claim 1, characterized in that: The auxiliary worm gear is provided with a first positioning hole; A second positioning hole corresponding to the first positioning hole is formed on the side of the mounting portion; The axial positioning pin passes through the first positioning hole and the second positioning hole in sequence, and is used to fix the relative positions of the main worm gear and the auxiliary worm gear.
6. The worm gear structure according to claim 5, characterized in that: A first positioning hole is respectively formed on two opposite sides of the auxiliary worm gear; A second positioning hole is respectively formed on two opposite sides of the mounting portion; There are two axial positioning pins, and each axial positioning pin passes through the corresponding first positioning hole and second positioning hole in sequence to complete positioning.
7. The worm gear structure according to claim 5, characterized in that: The first positioning hole is an oblong hole; The second positioning hole is a round hole.
8. The worm gear structure according to claim 1, characterized in that: The thickness of the mounting portion is the same as the thickness of the auxiliary worm gear.