A high stability worm reducer

Abstract

The invention discloses a high-stability worm reducer, which relates to the technical field of transmission devices, comprising a housing, wherein a worm and a worm wheel meshing with each other are rotatably connected inside the housing, and further comprising a switching mechanism, wherein the switching mechanism comprises a rotating shaft fixed on the worm wheel, wherein the inner wall of the rotating shaft is fixedly connected to a limit strip, wherein a mounting plate is arranged inside the rotating shaft, wherein the interior of the rotating shaft is rotatably connected to a driving shaft, wherein a second claw and a first claw are respectively fixedly connected to opposite sides of the driving shaft and the mounting plate, and a protection component is mounted on the mounting plate; and a buffer mechanism, wherein the buffer mechanism comprises a raised ring fixed on the driving shaft, wherein the angle between the rotating shaft and the driving shaft can be switched by disengaging the first claw and the second claw, and then adjusting the meshing position of the worm and the worm wheel when the device is subjected to a load, so that various positions on the worm are evenly utilized, thereby reducing local wear of the worm, extending the service life of the worm, and ensuring transmission accuracy and output stability during the use of the worm reducer.

Description

Technical Field

[0001] The invention relates to the technical field of transmission devices, and in particular to a high-stability worm reducer. Background Art

[0002] A worm reducer is a speed converter that uses gears to reduce the number of revolutions of a motor to the desired number of revolutions and obtain a power transmission mechanism with a larger torque. The worm reducer is mainly composed of a worm, a worm wheel, a housing, bearings, and seals. The worm wheel and the worm mesh with each other and are installed inside the housing. The rotating shafts of the worm wheel and the worm pass through the housing and are connected to external equipment. The housing is filled with lubricating oil. The sealing assembly prevents the leakage of lubricating oil by sealing the housing. The bearings support the rotation of the worm and the worm wheel to reduce friction and wear. Since the worm reducer has the characteristics of large transmission ratio, smooth transmission, and self-locking function, it is widely used in various mechanical equipment such as industrial production equipment, conveying machinery, and lifting equipment.

[0003] Generally, when in use, the worm in the worm reducer is fixed to the drive shaft on the motor, and the shaft of the worm wheel is fixed to the shaft of the object that requires a large torque drive. When the load on the object shaft changes periodically, and the rotation frequency of the worm is an integer multiple of the load frequency on the object shaft or there is a specific proportional relationship between the rotation frequency of the worm and the load frequency of the object shaft, during the transmission process, the worm will always be subjected to force at the same position. For example, when the object shaft drives the cam to squeeze an external object, the load on the worm will increase significantly when the cam performs the squeezing action. When the rotation frequency of the worm is an integer multiple of the frequency of the cam squeezing the object, the worm will be subjected to the load transmitted by the cam every time it rotates a certain number of times, which makes the load on the worm be at the same position each time. This situation will cause accelerated wear of local positions on the worm, affect the transmission accuracy of the worm wheel and worm, and lead to problems such as unstable output speed and torque fluctuation, affecting the normal operation of the equipment driven by the reducer. Summary of the invention

[0004] The purpose of the present invention is to propose a high-stability worm reducer to solve the problem that when the load on the object shaft changes periodically and the rotation frequency of the worm is an integer multiple of the load frequency on the object shaft or there is a specific proportional relationship between the rotation frequency of the worm and the load frequency of the object shaft, the worm wheel and the worm will always be subjected to force at the same position during the transmission process, resulting in accelerated wear of local positions on the worm wheel and the worm, affecting the transmission accuracy of the worm wheel and the worm.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technology: a high-stability worm reducer, comprising a housing, wherein a worm and a worm wheel meshing with each other are rotatably connected inside the housing, and further comprising:

[0006] A switching mechanism, the switching mechanism comprising a rotating shaft fixed on the worm gear, the inner wall of the rotating shaft being fixedly connected to a limit strip, a mounting plate being arranged inside the rotating shaft, a driving shaft being rotatably connected inside the rotating shaft, a second claw and a first claw being fixedly connected to opposite sides of the driving shaft and the mounting plate, respectively, and a protection component being installed on the mounting plate;

[0007] A buffer mechanism, the buffer mechanism comprising a raised ring fixed on the driving shaft, a sleeve slidably connected inside the first claw, a spring c is provided between the sleeve and the inner wall of the first claw, a first push plate and a second push plate are slidably connected inside the first claw, a connecting rod is movably connected between the first push plate and the sleeve, and a spring damper is installed between the first push plate and the second push plate;

[0008] When the claw 1 and the claw 2 are engaged, the rotation of the rotating shaft drives the driving shaft to rotate, and the sleeve is pushed by the raised ring, and the connecting rod is tilted to push the second push plate out of the claw 1. When the claw 1 and the claw 2 are out of the engaged state, the driving shaft and the rotating shaft switch positions.

[0009] As a further description of the above technology, a high-stability worm reducer is provided: an extension rod is fixedly connected to one side of the mounting disk, a shell is fixedly connected to one side of the housing, a reset spring is provided between the mounting disk and the shell, a connecting ring is rotatably connected to one side of the mounting disk, one end of the extension rod is fixedly connected to a spiral groove rod, the interior of the shell is slidably connected to a spiral groove rod fixed on the extension rod, a lead screw is threadedly connected to one side of the shell, and an insert embedded in the spiral groove of the spiral groove rod is slidably connected to the interior of the shell.

[0010] As a further description of a high-stability worm reducer of the above technology: the protection component includes an annular member rotatably connected to the outside of the mounting plate, the inside of the annular member is slidably connected to a block embedded in the mounting plate, the bottom of the block is inclined on both sides, and a spring a is provided on the top, and the annular member is slidably connected to the rotating shaft under the limit of the limit bar.

[0011] As a further description of a high-stability worm reducer of the above technology: one end of the screw is rotatably connected to a slider that slides inside the shell, and a spring b is fixedly connected between the slider and the insert.

[0012] As a further description of a high-stability worm reducer of the above technology: a groove matching the raised ring is opened on one side of the claw one, and a pressure block penetrating the claw one and extending into the groove is fixedly connected to one end of the sleeve.

[0013] As a further description of a high-stability worm reducer of the above technology: the interior of the claw 1 is fixedly connected with a friction rod that penetrates the pressure block, the sleeve and the spring c, and the outer side of the second push plate is rollingly connected with a ball.

[0014] As a further description of the above technology, a high-stability worm reducer also includes a supporting structure, which includes a protective cover fixed on the housing, the drive shaft passes through the protective cover, an inner ring and an outer ring are respectively sleeved on the drive shaft and inside the protective cover, and steel balls are rollingly connected between the inner ring and the outer ring.

[0015] As a further description of a high-stability worm reducer of the above technology: the inner wall of the protective cover is fixedly connected with an annular support extending between the outer ring and the inner ring and in contact with the steel balls, and an inner gear ring is also sleeved on the drive shaft, the inner part of the protective cover is rotatably connected with an outer gear ring, and the inner and outer gear rings are meshed with a gear rotatably mounted on the protective cover, and a snap ring is fixedly connected to one side of the outer gear ring.

[0016] As a further description of a high-stability worm reducer of the above technology: the contact surface between the annular support and the steel ball is provided with an oblique groove, and a notch is provided on one side of the buckling ring. The buckling ring is located between the outer ring and the inner ring, and the steel ball is embedded in the notch.

[0017] In summary, due to the adoption of the above-mentioned technology, a high-stability worm reducer has the following beneficial effects:

[0018] By disengaging the first and second claws, the angle between the rotating shaft and the driving shaft can be switched, and then the meshing position of the worm and the worm wheel when the device is subjected to a load can be adjusted, so as to avoid that when the worm is subjected to a load that is a multiple of its rotation frequency, the worm will be subjected to the load at the same position every time it rotates a certain number of times, so that various positions on the worm are evenly utilized, the local wear of the worm is reduced, the service life of the worm is extended, and the transmission accuracy of the worm reducer during use is ensured, the output stability is guaranteed, and the use effect is improved;

[0019] When the drive shaft is stuck or subjected to a load that the worm reducer cannot bear, the annular member and the mounting plate will be misaligned, causing the shaft and the worm wheel to idle, preventing the worm from continuing to rotate and causing the protruding teeth on the worm wheel to be subjected to an unbearable load and break, thus avoiding safety accidents and further extending the service life of the device;

[0020] The spring c, sleeve and friction rod have a buffering effect, which reduces the impact force on the claw 1 when the claw 1 and the claw 2 are engaged, protects the claw 1 and weakens the vibration and noise generated when the angle between the rotating shaft and the driving shaft is switched, preventing the vibration from affecting the transmission accuracy of the internal parts of the reducer;

[0021] When the claw 1 and the claw 2 are engaged, the second push plate extends from the inside of the claw 1, so that the second push plate pushes the claw 2 before the claw 1 and the claw 2 come into contact, thereby reducing the speed difference between the claw 1 and the claw 2 when they come into contact, thereby reducing the impact force generated when the claw 1 rotates and contacts the claw 2. The spring damper can be used to damp the collision generated when the second push plate rotates and contacts the claw 2. Therefore, under the action of the spring damper and the second push plate, the collision force generated when the claw 2 and the claw 2 are engaged and transmitted can be effectively reduced, the noise can be reduced, the service life of the two can be extended, and the use effect of the worm reducer can be improved;

[0022] As the spring damper is compressed, the thrust applied by the spring damper to the second push plate gradually increases. Therefore, in the process of the spring damper being compressed and damped, the force of the second push plate pushing the second claw continuously increases, so that the rotation speed of the second claw and the drive shaft changes from slow to fast. Compared with the rapid acceleration of the drive shaft for transmission, this design reduces the instantaneous load of the drive shaft during transmission, reduces the impact and wear of the drive shaft and its associated transmission parts, and reduces the deformation, fatigue cracks and other damages of parts caused by instantaneous high loads during long-term use, thereby extending the overall service life of the equipment. In addition, the reduction of instantaneous load makes the drive shaft more stable during transmission, reduces the vibration and shaking caused by rapid acceleration, and improves the transmission effect.

[0023] The outer ring, inner ring and steel balls are used to protect the driving shaft, providing uniform support for the driving shaft, making the driving shaft more stable during operation, helping to reduce the shaking and vibration of the driving shaft during rotation, and improving the accuracy and reliability of transmission. At the same time, it can effectively disperse the load borne by the driving shaft, reduce local stress concentration, and reduce the deformation and damage risks of the driving shaft;

[0024] The snap ring can continuously switch the position of the steel balls during the rotation of the drive shaft, so that each steel ball can be evenly stressed, reducing the wear, deformation and fatigue damage of a single steel ball, and ensuring the overall support effect of the steel balls. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 An overall schematic diagram provided according to an embodiment of the present invention is shown;

[0026] Figure 2 An internal schematic diagram provided according to an embodiment of the present invention is shown;

[0027] Figure 3 It shows a schematic diagram of the interior of a rotating shaft provided according to an embodiment of the present invention;

[0028] Figure 4 The embodiment of the present invention provides Figure 3 The enlarged schematic diagram at A in the middle;

[0029] Figure 5 A schematic diagram of a claw provided according to an embodiment of the present invention is shown;

[0030] Figure 6 A schematic diagram of a protection component provided according to an embodiment of the present invention is shown;

[0031] Figure 7 A schematic diagram of a second push plate provided according to an embodiment of the present invention is shown;

[0032] Figure 8 It shows a schematic diagram of the interior of a claw provided according to an embodiment of the present invention;

[0033] Fig. 9 A schematic diagram of an insert block provided according to an embodiment of the present invention is shown;

[0034] Fig.10 It shows a schematic diagram of an explosion of an outer gear ring provided according to an embodiment of the present invention;

[0035] Fig.11 A schematic diagram of a buckling ring provided according to an embodiment of the present invention is shown.

[0036] Legend:

[0037] 10. Box body; 11. Worm; 12. Worm wheel; 13. Drive shaft;

[0038] 20. Switching mechanism; 21. Rotating shaft; 22. Limiting strip; 23. Mounting plate; 24. Claw 1; 25. Claw 2; 26. Extension rod; 27. Return spring; 28. Housing; 29. ​​Spiral groove rod; 210. Screw rod; 211. Block; 212. Protective assembly; 2121. Ring; 2122. Spring a; 2123. Block; 213. Connecting ring; 214. Slider; 215. Spring b;

[0039] 30. Buffer mechanism; 31. Raised ring; 32. Press block; 33. Sleeve; 34. Spring c; 35. Friction rod; 36. Connecting rod; 37. First push plate; 38. Spring damper; 39. Second push plate; 310. Ball;

[0040] 40. Support structure; 41. Protective cover; 42. Outer ring; 43. Inner ring; 44. Steel ball; 45. Annular support; 46. Inner gear ring; 47. Gear; 48. Outer gear ring; 49. Snap ring. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technology in the embodiments of the present invention, a high-stability worm reducer. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] like Figure 1-Figure 11 As shown, the present invention provides: a high-stability worm reducer, including a housing 10, wherein a worm 11 and a worm wheel 12 meshing with each other are rotatably connected inside the housing 10, and further comprising:

[0043] The switching mechanism 20 includes a rotating shaft 21 fixed on the worm gear 12, a limit bar 22 is fixedly connected to the inner wall of the rotating shaft 21, a mounting plate 23 is arranged inside the rotating shaft 21, the driving shaft 13 is rotatably connected inside the rotating shaft 21, a second claw 25 and a first claw 24 are fixedly connected to the opposite sides of the driving shaft 13 and the mounting plate 23, and a protection component 212 is installed on the mounting plate 23;

[0044] The buffer mechanism 30 includes a raised ring 31 fixed on the drive shaft 13, a sleeve 33 is slidably connected inside the claw 24, a spring c34 is provided between the sleeve 33 and the inner wall of the claw 24, a first push plate 37 and a second push plate 39 are slidably connected inside the claw 24, a connecting rod 36 is movably connected between the first push plate 37 and the sleeve 33, both ends of the connecting rod 36 are spherical, so that the connecting rod 36 can deflect with the movement of the first push plate 37 while pushing the first push plate 37, so as to achieve a better supporting effect, and a spring damper 38 is installed between the first push plate 37 and the second push plate 39;

[0045] When claw 1 24 and claw 2 25 are engaged, the rotating shaft 21 rotates to drive the driving shaft 13 to rotate, and the sleeve 33 is pushed by the raised ring 31, and the connecting rod 36 tilts to push the second push plate 39 out of the claw 1 24. When claw 1 24 and claw 25 are out of the engaged state, the driving shaft 13 and the rotating shaft 21 switch positions.

[0046] Reference Figure 1 , Figure 3 and Fig. 9, an extension rod 26 is fixedly connected to one side of the mounting disk 23, a shell 28 is fixedly connected to one side of the box body 10, a reset spring 27 is provided between the mounting disk 23 and the shell 28, a first push plate 37 is used to drive the mounting disk 23 to reset after the spiral groove rod 29 is loosened, so that the claw 1 24 and the claw 2 25 are re-engaged, and a connecting ring 213 is rotatably connected to one side of the mounting disk 23 to prevent the rotation of the mounting disk 23 from torsion damage to the reset spring 27, one end of the extension rod 26 is fixedly connected to the spiral groove rod 29, the inside of the shell 28 is slidably connected to the spiral groove rod 29 fixed on the extension rod 26, a screw rod 210 is threadedly connected to one side of the shell 28, and an insert 211 embedded in the spiral groove of the spiral groove rod 29 is slidably connected to the inside of the shell 28.

[0047] Reference Figure 3 and Figure 6 The protection component 212 includes an annular member 2121 rotatably connected to the outside of the mounting plate 23. The inside of the annular member 2121 is slidably connected to a clamping block 2123 embedded in the mounting plate 23. The bottom sides of the clamping block 2123 are inclined. When the rotating shaft 21 and the limit bar 22 rotate to drive the annular member 2121 to rotate, the annular member 2121 drives the mounting plate 23 to rotate synchronously through the clamping block 2123. When the drive shaft 13 is stuck or subjected to a huge load, the claw 1 24, the claw 25 and the mounting plate 23 will be difficult to rotate. Even in the case of stopping rotation, the ring member 2121 continues to rotate, which causes the inclined surface of the block 2123 to be squeezed and disengaged from the mounting plate 23, causing idling between the ring member 2121 and the mounting plate 23. A spring a2122 is provided on the top, and the ring member 2121 is slidably connected to the rotating shaft 21 under the limit of the limit bar 22. Therefore, when the block 2123 is embedded in the mounting plate 23, the ring member 2121, the mounting plate 23, the extension rod 26 and the spiral groove rod 29 can only slide horizontally inside the rotating shaft 21.

[0048] During the process of the rotation of the rotating shaft 21 and the limiting bar 22 driving the mounting plate 23, the extension rod 26 and the spiral groove rod 29 to rotate, since the insert block 211 is embedded in the spiral groove of the spiral groove rod 29, the spiral groove rod 29 cannot rotate relative to the rotating shaft 21. Therefore, the spiral groove rod 29 will move laterally during the rotation process, driving the extension rod 26 and the mounting plate 23 to slide inside the rotating shaft 21, so that the claw 1 24 and the claw 2 25 are out of engagement.

[0049] Reference Fig. 9One end of the screw rod 210 is rotatably connected to a slider 214 that slides inside the housing 28, and a spring b215 is fixedly connected between the slider 214 and the insert 211. After the screw rod 210 is rotated to make the slider 214 drive the insert 211 to contact the spiral groove rod 29, the spiral groove of the spiral groove rod 29 may not rotate to the direction of the insert 211, so that the insert 211 cannot be immediately embedded in the spiral groove of the spiral groove rod 29. Therefore, the elastic force of the spring b215 can give the insert 211 a continuous thrust toward the spiral groove rod 29, so that when the spiral groove of the spiral groove rod 29 rotates to the direction of the insert 211, the insert 211 can be pushed into the spiral groove under the elastic force. Therefore, this design improves the ease of embedding of the insert 211 and the spiral groove rod 29.

[0050] Reference Figure 5 and Figure 8 A groove that matches the raised ring 31 is formed on one side of the claw 1 24, and a pressure block 32 that penetrates the claw 1 24 and extends into the groove is fixedly connected to one end of the sleeve 33. When the claw 1 24 and the claw 2 25 are engaged, the raised ring 31 will enter the groove of the claw 1 24 and push the pressure block 32. The purpose of the groove is to prevent the pressure block 32 from protruding from the claw 1 24, avoiding the situation where the pressure block 32 and the claw 2 25 are engaged, resulting in the pressure block 32 being squeezed and damaged. In addition, the adaptation of the raised ring 31 and the groove of the claw 1 24 also helps to limit the claw 1 24, so that the claw 1 24 can withstand a stronger load.

[0051] Reference Figure 7 and Figure 8 The interior of the claw 1 24 is fixedly connected with a friction rod 35 that penetrates the pressure block 32, the sleeve 33 and the spring c34. There is friction between the friction rod 35 and the sleeve 33. When the two move relative to each other, the friction can convert mechanical energy into internal energy, so that the mechanical energy is consumed, so that when the claw 1 24 and the claw 2 25 are engaged, the sleeve 33, the spring c34 and the friction rod 35 can play a buffering effect. The outer side of the second push plate 39 is rollingly connected with a ball 310, which reduces the friction between the claw 1 24 and the claw 2 25 when they are out of engagement, thereby reducing friction loss.

[0052] Reference Figure 2 and Figure 4 , and also includes a supporting structure 40, the supporting structure 40 includes a protective cover 41 fixed on the box body 10, the driving shaft 13 passes through the protective cover 41, an inner ring 43 and an outer ring 42 are respectively sleeved on the driving shaft 13 and inside the protective cover 41, and a steel ball 44 is rollingly connected between the inner ring 43 and the outer ring 42. The periphery of the driving shaft 13 is supported by the outer ring 42, the inner ring 43 and the steel balls 44, so that the driving shaft 13 is difficult to bend and deform when subjected to load, thereby ensuring the transmission effect of the driving shaft 13.

[0053] Reference Figure 4 and Fig.10 The inner wall of the protective cover 41 is fixedly connected with an annular support member 45 extending between the outer ring 42 and the inner ring 43 and in contact with the steel ball 44. An inner gear ring 46 is also sleeved on the drive shaft 13. The inner part of the protective cover 41 is rotatably connected with an outer gear ring 48. A gear 47 rotatably mounted on the protective cover 41 is meshed and connected between the inner gear ring 46 and the outer gear ring 48. A buckling ring 49 is fixedly connected to one side of the outer gear ring 48. Under the rotation of the inner gear ring 46, the gear 47 and the outer gear ring 48, the rotation of the drive shaft 13 will drive the buckling ring 49 to rotate, move the steel ball 44, make the steel ball 44 roll, switch the pressure position of the steel ball 44, and avoid continuous pressure and wear on a single part of the steel ball 44, which reduces the support effect.

[0054] Reference Figure 4 , Fig.10 and Fig.11 The contact surface between the annular support member 45 and the steel ball 44 is provided with an inclined groove, which is used to make the steel ball 44 rotate when rolling, realize the position switching of the steel ball 44, and further improve the effect of preventing the wear of the steel ball 44. A notch is provided on one side of the buckling ring 49, and the buckling ring 49 is located between the outer ring 42 and the inner ring 43, and the steel ball 44 is embedded in the notch, so that the steel ball 44 is evenly distributed, so that the steel ball 44 can be evenly supported. When rotating, the buckling ring 49 can drive all the steel balls 44 to make synchronous circular motion, balance the wear of each steel ball 44, and further improve the supporting effect of the steel ball 44.

[0055] Working principle: In the initial state, the first claw 24 and the second claw 25 are in an engaged state, and the insert block 211 is not embedded in the spiral groove of the spiral groove rod 29;

[0056] The worm 11 and the drive shaft 13 are fixed to the motor output shaft and the external object to be driven respectively, and the motor is started to drive the worm 11 to rotate. The rotation of the worm 11 drives the rotating shaft 21 and the limit bar 22 to rotate, and drives the annular member 2121, the block 2123, the mounting plate 23, the first claw 24, the second claw 25 and the drive shaft 13 to rotate, thereby realizing the reduction transmission. The rotation of the mounting plate 23 drives the extension rod 26 and the spiral groove rod 29 to rotate at the same time;

[0057] When it is necessary to switch the angle between the rotating shaft 21 and the driving shaft 13 to prevent the worm 11 from always being stressed at a single position, the screw rod 210 is rotated to drive the slider 214, the spring b215 and the insert 211 to move, so that the insert 211 contacts the spiral groove rod 29. The slider 214 continues to move to compress the spring b215. When the spiral groove of the spiral groove rod 29 is aligned with the insert 211, the stretching elastic force of the spring b215 pushes the insert 211 to embed it in the spiral groove. Since the annular member 2121, the block 2123, the mounting plate 23, the extension rod 26 and the spiral groove rod 29 cannot rotate relative to the rotating shaft 21 under the limit of the limit bar 22, the insert 211 After being embedded in the spiral groove of the spiral groove rod 29, the spiral groove rod 29 continues to rotate and moves in the direction away from the driving shaft 13, driving the extension rod 26, the mounting plate 23 and the claw 1 24 to move, so that the claw 1 24 is disengaged from the claw 2 25. At this time, the driving shaft 13 and the claw 25 are in a stopped state, and the mounting plate 23 and the claw 1 24 continue to rotate with the rotating shaft 21 to achieve the angle switching between the driving shaft 13 and the rotating shaft 21. Then, the screw rod 210 is rotated in the reverse direction to disengage the insert block 211 from the spiral groove rod 29. The stretching elastic force of the reset spring 27 drives the mounting plate 23 and the claw 2 25 to reset, and the claw 2 25 is reengaged with the claw 1 24 to drive the driving shaft 13 to rotate.

[0058] When the drive shaft 13 is stuck or subjected to a huge load, the first claw 24, the second claw 25 and the mounting plate 23 will be difficult to rotate or even stop rotating. At this time, the ring 2121 continues to rotate, so that the inclined surface of the clamping block 2123 is squeezed and disengaged from the mounting plate 23, causing idling between the ring 2121 and the mounting plate 23, so that the worm 11 can drive the worm wheel 12 to continue rotating, thereby preventing the protruding teeth on the worm wheel 12 from being broken and damaged under high load;

[0059] When the claw 1 24 is engaged with the claw 2 25, the raised ring 31 enters the groove of the claw 1 24 and pushes the pressure block 32 and the sleeve 33. At this time, the sleeve 33 reduces the impact of the pressure block 32 and the raised ring 31 through friction, reducing the impact force of the claw 1 24 and the drive shaft 13. The movement of the sleeve 33 drives the connecting rod 36 to deflect and push the first push plate 37, the spring damper 38 and the second push plate 39. The second push plate 39 extends out of the claw 1 24. When the claw 1 24 rotates and drives the second push plate 39 to collide with the claw 2 25, the spring damper 38 reduces the vibration caused by the collision. Under the push of the spring damper 38 and the second push plate 39, the speed difference before the claw 2 25 contacts the claw 1 24 is reduced, and the drive shaft 13 can start to rotate from slow to fast.

[0060] When the drive shaft 13 rotates, it drives the inner gear ring 46 to rotate, and drives the outer gear ring 48 to rotate in the opposite direction through the gear 47. The rotation of the outer gear ring 48 drives the steel balls 44 in its gap to make circular motion between the outer ring 42 and the inner ring 43, switching the position of the steel balls 44. At the same time, the steel balls 44 roll on the annular support 45 to switch their own pressure position.

[0061] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes to a high-stability worm reducer and its inventive concept according to the technology of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-stability worm reducer, comprising a housing (10), wherein a worm (11) and a worm wheel (12) meshing with each other are rotatably connected inside the housing (10), characterized in that: Also includes: A switching mechanism (20), the switching mechanism (20) comprising a rotating shaft (21) fixed on the worm gear (12), the inner wall of the rotating shaft (21) being fixedly connected to a limit strip (22), a mounting plate (23) being arranged inside the rotating shaft (21), the interior of the rotating shaft (21) being rotatably connected to a driving shaft (13), a second claw (25) and a first claw (24) being fixedly connected to opposite sides of the driving shaft (13) and the mounting plate (23), and a protection component (212) being mounted on the mounting plate (23); A buffer mechanism (30), the buffer mechanism (30) comprising a raised ring (31) fixed on the drive shaft (13), the interior of the claw (24) being slidably connected to a sleeve (33), a spring c (34) being provided between the sleeve (33) and the inner wall of the claw (24), the interior of the claw (24) being slidably connected to a first push plate (37) and a second push plate (39), a connecting rod (36) being movably connected between the first push plate (37) and the sleeve (33), and a spring damper (38) being provided between the first push plate (37) and the second push plate (39); An extension rod (26) is fixedly connected to one side of the mounting plate (23), a housing (28) is fixedly connected to one side of the box body (10), a return spring (27) is provided between the mounting plate (23) and the housing (28), a connecting ring (213) is rotatably connected to one side of the mounting plate (23), a spiral groove rod (29) is fixedly connected to one end of the extension rod (26), the housing (28) is slidably connected to the spiral groove rod (29) fixed to the extension rod (26), a lead screw (210) is threadedly connected to one side of the housing (28), and an insert (211) embedded in the spiral groove of the spiral groove rod (29) is slidably connected to the inside of the housing (28); When the load on the rotating shaft of the object changes periodically and the rotation frequency of the worm (11) is an integer multiple of the load frequency on the rotating shaft of the object, when the first claw (24) and the second claw (25) are engaged, the rotating shaft (21) rotates to drive the driving shaft (13) to rotate, and the sleeve (33) is pushed by the raised ring (31), and the connecting rod (36) tilts to push the second push plate (39) out of the first claw (24), and when the first claw (24) and the second claw (25) are out of the engaged state, the driving shaft (13) and the rotating shaft (21) switch positions.

2. A high stability worm reducer according to claim 1, characterized in that: The protection component (212) comprises an annular member (2121) rotatably connected to the outside of the mounting plate (23); the interior of the annular member (2121) is slidably connected to a clamping block (2123) embedded in the interior of the mounting plate (23); the bottom of the clamping block (2123) is inclined at both sides, and a spring a (2122) is provided at the top; the annular member (2121) is slidably connected to the rotating shaft (21) under the limit of the limit bar (22).

3. A high stability worm reducer according to claim 1, characterized in that: One end of the screw rod (210) is rotatably connected to a slider (214) that slides inside the housing (28), and a spring b (215) is fixedly connected between the slider (214) and the insert (211).

4. A high stability worm reducer according to claim 1, characterized in that: A groove matching the raised ring (31) is formed on one side of the claw one (24), and a pressure block (32) penetrating through the claw one (24) and extending into the groove is fixedly connected to one end of the sleeve (33).

5. A high stability worm reducer according to claim 4, characterized in that: The interior of the claw 1 (24) is fixedly connected to a friction rod (35) that penetrates the pressure block (32), the sleeve (33) and the spring c (34), and the outer side of the second push plate (39) is rollingly connected to a ball (310).

6. A high stability worm reducer according to claim 1, characterized in that: The invention also comprises a support structure (40), wherein the support structure (40) comprises a protective cover (41) fixed on the box body (10), the drive shaft (13) passes through the protective cover (41), an inner ring (43) and an outer ring (42) are respectively sleeved on the drive shaft (13) and inside the protective cover (41), and a steel ball (44) is rollingly connected between the inner ring (43) and the outer ring (42).

7. A high stability worm reducer according to claim 6, characterized in that: The inner wall of the protective cover (41) is fixedly connected to an annular support member (45) extending between the outer ring (42) and the inner ring (43) and in contact with the steel ball (44); an inner gear ring (46) is also sleeved on the drive shaft (13); an outer gear ring (48) is rotatably connected to the inside of the protective cover (41); a gear (47) rotatably mounted on the protective cover (41) is meshedly connected between the inner gear ring (46) and the outer gear ring (48); and a buckling ring (49) is fixedly connected to one side of the outer gear ring (48).

8. A high stability worm reducer according to claim 7, characterized in that: An oblique groove is provided on the contact surface between the annular support member (45) and the steel ball (44), and a notch is provided on one side of the buckling ring (49). The buckling ring (49) is located between the outer ring (42) and the inner ring (43), and the steel ball (44) is embedded in the notch.

Images