Adjustable backlash-free turbine worm reducer

Abstract

The invention relates to the field of speed reducers, and discloses an adjustable backlash-free turbine worm speed reducer which comprises a box body, two box covers connected to the box body, an input shaft penetrating through the two box covers and the box body and rotationally connected with the box covers, a worm installed outside the input shaft and an output shaft rotationally connected to the box body. The device has the following advantages and effects that the rotating rod rotates to drive the fifth gear outside the rotating rod to rotate, the fifth gear is meshed with the gear ring to enable the gear ring to rotate, the gear ring drives the mounting ring to rotate when rotating, the inner tooth sets and the outer tooth sets on the mounting ring rotate, and the inner tooth sets and the outer tooth sets are arranged at intervals; the inner tooth set and the outer tooth set drive the second gear and the third gear to rotate at intervals, the screw and the rotating shaft rotate at intervals, the screw firstly rotates to drive the input shaft on the bearing seat to move downwards, the distance between the worm and the turbine is changed, and therefore errors caused by too large gaps are made up.

Description

Technical Field

[0001] The present invention relates to the technical field of speed reducers, and in particular to an adjustable backlash-free worm gear speed reducer. Background Art

[0002] A worm gear reducer is a power transmission mechanism that uses a gear speed converter to reduce the speed of a motor to the desired speed and generate a high torque. Reducers are widely used in mechanisms used to transmit power and motion.

[0003] In actual production, due to errors in component processing, changes in component dimensions due to long-term wear, or thermal expansion and contraction of components caused by changes in ambient temperature, it is difficult for the worm wheel and worm to achieve the tight engagement shown on the design drawings, and more or less gaps exist. These gaps also cause inaccurate transmission during the operation of the worm gear reducer. For example, Chinese patent CN220302716U discloses a gap-compensating clutch worm reducer. Whenever the gap between the worm and the worm increases due to long-term operation, the nuts on the two screws are tightened to remove the inner shell from the housing mechanism. The height of the inner shell inside the housing mechanism is then adjusted, and the nuts are used to fix the inner shell to the housing mechanism again, thereby reducing the gap between the worm and the worm, thereby compensating for the error caused by the excessive gap. However, this adjustment method cannot achieve synchronous adjustment, is laborious to adjust, and is prone to adjustment errors, which affect the normal use of the worm. Therefore, we propose an adjustable backlash-free worm reducer. Summary of the Invention

[0004] The purpose of the present invention is to provide an adjustable backlash-free worm gear reducer with the functions of synchronous adjustment and synchronous locking to achieve the effect of reducing adjustment errors.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: an adjustable backlash-free worm gear reducer, comprising a housing, two housing covers connected to the housing, an input shaft passing through the two housing covers and the housing and rotatably connected to the housing covers, a worm mounted on the outside of the input shaft, an output shaft rotatably connected to the housing, a turbine mounted on the outside of the output shaft and meshing with the worm, a bearing rotatably connected to the outside of the input shaft, and a bearing seat mounted on the outside of the bearing, an adjustment assembly is installed inside the housing cover, the adjustment assembly includes a screw rotatably connected to the housing cover and passing through the bearing seat, a fixing nut threadedly connected to the outside of the screw and connected to the bottom of the bearing seat, and a movable nut threadedly connected to the outside of the screw and pressing the top of the bearing seat, a gear 1 is installed on the movable nut, a gear 2 is installed on the outside of the screw, a linkage assembly with one end meshing with the gear 1 is also installed inside the housing cover, a transmission assembly is installed on the inner wall of the housing, the transmission assembly intermittently meshes with the linkage assembly and gear 2, and a rotating assembly meshing with the transmission assembly is also installed on the housing.

[0006] By adopting the above technical solution, an external power source is connected to the input shaft, so that the worm outside the input shaft rotates, the worm meshes with the turbine, and drives the output shaft to rotate. Due to the meshing of the worm and the turbine, the speed of the output shaft is changed. When the worm and the turbine are worn after long-term transmission, the rotating assembly is rotated, and the rotating assembly drives the transmission assembly to rotate. During the rotation of the transmission assembly, it intermittently meshes with the linkage assembly and gear 2. When the transmission assembly meshes with gear 2, gear 2 is used to drive the screw to rotate, so that the four screws rotate synchronously, so that the bearing seat moves downward on the outside of the screw, and the input shaft drives the worm to move downward, changing the distance to the turbine, and increasing the distance between the worm and the turbine, thereby compensating for the error caused by the excessive gap, and synchronously adjusting the left and right ends of the input shaft so that the two ends of the worm can move downward synchronously, which makes adjustment more convenient and avoids errors during the adjustment process.

[0007] When the transmission assembly is engaged with the linkage assembly, the linkage assembly drives the gear to rotate, and the gear rotates to drive the movable nut to rotate. When the bearing seat moves to change the distance from the worm to the turbine, the movable nut can move down and squeeze the top of the bearing seat, making the connection between the bearing seat and the screw more secure, avoiding shaking of the worm when rotating, and improving the stability of the worm rotation.

[0008] The present invention is further configured as follows: an oil tank is installed on the inner bottom wall of the box body, and one end of the turbine extends into the interior of the oil tank.

[0009] By adopting the above technical solution, the turbine continuously brings out the lubricating oil in the oil tank during the rotation process, which facilitates the lubrication of the worm and the turbine.

[0010] The present invention is further configured as follows: the oil tank is further connected to an oil inlet pipe having one end extending to the outside of the box body.

[0011] By adopting the above technical solution, the oil inlet pipe is convenient for replenishing lubricating oil into the oil tank.

[0012] The present invention is further configured as follows: an input end cover is installed on the outside of the input shaft with one end connected to the box cover.

[0013] The present invention is further configured as follows: the linkage assembly includes a rotating shaft rotatably connected to the box cover, and gear three and gear four installed outside the rotating shaft.

[0014] The present invention is further configured as follows: the gear four is meshed with the gear one.

[0015] By adopting the above technical solution, when the transmission assembly is engaged with gear three, gear four outside the rotating shaft rotates synchronously, and gear four is engaged with gear one, so that when gear one rotates, the movable nut is driven to rotate. When the bearing seat moves to change the distance from the worm to the turbine, the movable nut can move down and squeeze the top of the bearing seat, making the connection between the bearing seat and the screw more secure, avoiding shaking of the worm when rotating, and improving the stability of the worm rotation.

[0016] The present invention is further configured as follows: the linkage assembly includes an arc-shaped support ring installed on the box body, a gear ring rotatably connected to the arc-shaped support ring, a mounting ring installed on the gear ring, and an inner tooth group and an outer tooth group installed on the mounting ring.

[0017] The present invention is further configured such that: the internal tooth set is engaged with the second gear, and the external tooth set is engaged with the third gear.

[0018] The present invention is further configured such that: the outer tooth group and the inner tooth group are composed of the same number of not less than five latching teeth, and the inner tooth group and the outer tooth group are distributed at equal intervals on the mounting ring.

[0019] By adopting the above technical solution, the rotating assembly rotates, causing the ring gear to rotate. When the ring gear rotates, it drives the mounting ring to rotate, causing the inner tooth group and the outer tooth group on the mounting ring to rotate. The inner tooth group and the outer tooth group are arranged at intervals, so that the inner tooth group and the outer tooth group drive gear two and gear three to rotate at intervals, so that the screw and the rotating shaft rotate at intervals. The screw rotates first to drive the input shaft on the bearing seat to move downward, changing the distance from the worm to the turbine. The rotation of the rotating shaft causes the gear four outside it to rotate synchronously. Gear four meshes with gear one, so that when gear one rotates, it drives the movable nut to rotate. When the bearing seat moves to change the distance from the worm to the turbine, the movable nut can move downward accordingly to squeeze the top of the bearing seat, making the connection between the bearing seat and the screw more firm, avoiding shaking of the worm when rotating, and improving the stability of the worm rotation. During the adjustment process, the left and right ends of the input shaft are adjusted synchronously, so that the two ends of the worm can move downward synchronously, and the movable nuts at the left and right ends also maintain a synchronous downward state, which is more convenient to adjust and avoids errors during the adjustment process.

[0020] By adopting the above technical solution, the external tooth group and the internal tooth group are composed of the same number of latch teeth, so that the rotation range of the screw and the rotating shaft is consistent, that is, the movable nut moves down by the same distance as the bearing seat moves down, so that the movable nut and the surface of the bearing seat are always kept in a squeezed state, thereby improving the stability of the worm rotation.

[0021] The present invention is further configured as follows: the rotating assembly includes a rotating rod rotatably connected to the bottom wall of the box body and a gear five installed outside the rotating rod, and the gear five is engaged with the ring gear.

[0022] By adopting the above technical solution, the rotation of the rotating rod drives the gear five outside it to rotate, and the gear five engages with the ring gear to rotate the ring gear, thereby driving the mounting ring to rotate, adjusting the horizontal height of the bearing seat and the movable nut, reducing the gap between the worm and the turbine while ensuring the stable rotation of the worm.

[0023] The beneficial effects of the present invention are:

[0024] 1. This adjustable backlash-free worm gear reducer rotates the rotating rod to drive the external gear five to rotate. Gear five meshes with the ring gear to rotate the ring gear. When the ring gear rotates, it drives the mounting ring to rotate, causing the internal tooth group and the external tooth group on the mounting ring to rotate. The internal tooth group and the external tooth group are arranged at intervals, so that the internal tooth group and the external tooth group drive gear two and gear three to rotate, causing the screw and the rotating shaft to rotate at intervals. The screw rotates first to drive the input shaft on the bearing seat to move downward, changing the distance from the worm to the turbine, thereby compensating for the error caused by excessive clearance.

[0025] 2. This adjustable backlash-free worm gear reducer rotates the rotating shaft to make the external gear four rotate synchronously. Gear four meshes with gear one, so that when gear one rotates, it drives the movable nut to rotate. When the bearing seat moves to change the distance from the worm to the worm, the movable nut can move down and squeeze the top of the bearing seat, making the connection between the bearing seat and the screw more secure, avoiding shaking of the worm when rotating, and improving the stability of the worm rotation.

[0026] 3. During the adjustment process of the adjustable backlash-free worm gear reducer, the left and right ends of the input shaft are adjusted synchronously, so that the two ends of the worm can move downward synchronously, and the movable nuts on the left and right ends also maintain a synchronous downward state, which makes adjustment more convenient and avoids errors during the adjustment process.

[0027] 4. The adjustable backlash-free worm reducer has an external tooth group and an internal tooth group composed of the same number of teeth, which ensures that the rotation range of the screw and the rotating shaft are consistent. That is, the movable nut moves down the same distance as the bearing seat moves down, so that the movable nut and the surface of the bearing seat are always in a squeezed state, further improving the stability of the worm rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a structural schematic diagram of an adjustable backlash-free worm gear reducer according to the present invention;

[0030] Figure 2 This is a side structural diagram of the connection between the adjustment assembly and the bearing seat of the present invention;

[0031] Figure 3 It is a schematic diagram of the meshing of the internal tooth set and gear 2 in the linkage assembly of the present invention;

[0032] Figure 4 It is a schematic diagram of the meshing of the external tooth group and the gear in the linkage assembly of the present invention;

[0033] Figure 5 Schematic diagram of the meshing structure between the ring gear and gear five in the linkage assembly of the present invention;

[0034] In the figure, 1. casing; 2. casing cover; 3. input end cover; 4. input shaft; 5. worm; 6. output shaft; 7. turbine; 8. oil tank; 9. bearing; 10. bearing seat; 11. fixing nut; 12. movable nut; 13. gear one; 14. gear two; 15. arc-shaped support ring; 16. gear ring; 17. mounting ring; 18. screw; 19. internal tooth group; 20. external tooth group; 21. rotating shaft; 22. gear three; 23. gear four; 24. rotating rod; 25. gear five. DETAILED DESCRIPTION

[0035] The technical solutions of the present invention will be described clearly and completely below with reference to specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0036] See also Figure 1-5 The present invention provides an adjustable backlash-free worm gear reducer, comprising a housing 1, two housing covers 2 connected to the housing 1, an input shaft 4 passing through the two housing covers 2 and the housing 1 and rotatably connected to the housing cover 2, a worm 5 mounted on the outside of the input shaft 4, an output shaft 6 rotatably connected to the housing 1, a turbine 7 mounted on the outside of the output shaft 6 and meshing with the worm 5, a bearing 9 rotatably connected to the outside of the input shaft 4, and a bearing seat 10 mounted on the outside of the bearing 9. An adjustment component is installed inside the housing cover 2, and the adjustment component includes a shaft rotatably connected to the housing cover 2 and passing through the shaft The screw 18 of the bearing seat 10, the fixing nut 11 threadedly connected to the outside of the screw 18 and connected to the bottom of the bearing seat 10, and the movable nut 12 threadedly connected to the outside of the screw 18 and squeezing the top of the bearing seat 10, the movable nut 12 is installed with a gear 13, the outside of the screw 18 is installed with a gear 2 14, and the interior of the box cover 2 is also installed with a linkage component with one end meshing with the gear 13, and a transmission component is installed on the inner wall of the box body 1, and the transmission component intermittently meshes with the linkage component and gear 2 14, and the box body 1 is also installed with a rotating component meshing with the transmission component.

[0037] The external power source is connected to the input shaft 4, so that the worm 5 outside the input shaft 4 rotates, and the worm 5 meshes with the turbine 7, driving the output shaft 6 to rotate. Due to the meshing of the worm 5 and the turbine 7, the speed of the output shaft 6 is changed. When the worm 5 and the turbine 7 are worn after long-term transmission, the rotating assembly is rotated, and the rotating assembly drives the transmission assembly to rotate. During the rotation of the transmission assembly, it intermittently meshes with the linkage assembly and gear 2 14. When the transmission assembly meshes with gear 2 14, the gear 2 14 is used to drive the screw 18 to rotate, so that the four screws 18 rotate synchronously, thereby causing the bearing seat 10 to move downward outside the screw 18, causing the input shaft 4 to drive the worm 5 downward, changing the distance to the turbine 7, and increasing the distance between the worm 5 and the turbine 7, thereby compensating for the error caused by the excessive gap, and synchronously adjusting the left and right ends of the input shaft 4 so that the two ends of the worm 5 can move downward synchronously, which is more convenient and avoids errors during the adjustment process.

[0038] When the transmission assembly is engaged with the linkage assembly, the linkage assembly drives gear 13 to rotate, and when gear 13 rotates, it drives the movable nut 12 to rotate. When the bearing seat 10 moves to change the distance from the worm 5 to the turbine 7, the movable nut 12 can move down to squeeze the top of the bearing seat 10, making the connection between the bearing seat 10 and the screw 18 more secure, avoiding shaking of the worm 5 during rotation, and improving the stability of the rotation of the worm 5.

[0039] An oil groove 8 is installed on the inner bottom wall of the box body 1, and one end of the turbine 7 extends into the oil groove 8. During the rotation of the turbine 7, the lubricating oil in the oil groove 8 is continuously brought out, which is convenient for lubricating the worm 5 and the turbine 7.

[0040] The oil tank 8 is also connected to an oil inlet pipe with one end extending to the outside of the box body 1, and the oil inlet pipe is convenient for replenishing lubricating oil into the oil tank 8.

[0041] An input end cover 3 is installed on the outside of the input shaft 4, with one end connected to the box cover 2.

[0042] The linkage assembly includes a rotating shaft 21 rotatably connected to the box cover 2 and gear three 22 and gear four 23 installed on the outside of the rotating shaft 21. Gear four 23 is engaged with gear one 13. When the transmission assembly is engaged with gear three 22, gear four 23 on the outside of the rotating shaft 21 rotates synchronously. Gear four 23 is engaged with gear one 13, so that when gear one 13 rotates, it drives the movable nut 12 to rotate. When the bearing seat 10 moves to change the distance from the worm 5 to the turbine 7, the movable nut 12 can move down and squeeze the top of the bearing seat 10, so that the connection between the bearing seat 10 and the screw 18 is more firm, avoiding shaking of the worm 5 during rotation and improving the stability of the rotation of the worm 5.

[0043] The linkage assembly includes an arc-shaped support ring 15 installed on the box body 1, a gear ring 16 rotatably connected to the arc-shaped support ring 15, a mounting ring 17 installed on the gear ring 16, and an inner tooth group 19 and an outer tooth group 20 installed on the mounting ring 17. The inner tooth group 19 is engaged with the gear two 14, and the outer tooth group 20 is engaged with the gear three 22. The outer tooth group 20 and the inner tooth group 19 are composed of the same number of not less than five teeth, and the inner tooth group 19 and the outer tooth group 20 are distributed at equal distances on the mounting ring 17.

[0044] The rotating assembly rotates, causing the ring gear 16 to rotate. When the ring gear 16 rotates, it drives the mounting ring 17 to rotate, causing the inner tooth group 19 and the outer tooth group 20 on the mounting ring 17 to rotate. The inner tooth group 19 and the outer tooth group 20 are arranged at intervals, so that the inner tooth group 19 and the outer tooth group 20 drive the gear 2 14 and the gear 3 22 to rotate at intervals, causing the screw 18 and the rotating shaft 21 to rotate at intervals. The screw 18 rotates first to drive the input shaft 4 on the bearing seat 10 to move downward, changing the distance from the worm 5 to the turbine 5. The rotating shaft 21 rotates so that the gear 4 23 outside it rotates synchronously, and the gear 4 23 rotates with the gear 1 1 3 is engaged, so that when the gear 13 rotates, the movable nut 12 is driven to rotate. When the bearing seat 10 moves to change the distance between the worm 5 and the turbine 7, the movable nut 12 can move downward to squeeze the top of the bearing seat 10, so that the connection between the bearing seat 10 and the screw 18 is more secure, avoiding the shaking of the worm 5 when rotating and improving the rotation stability of the worm 5. During the adjustment process, the left and right ends of the input shaft 4 are adjusted synchronously, so that the two ends of the worm 5 can move downward synchronously, and the movable nuts 12 at the left and right ends also maintain a synchronous downward state, which is more convenient to adjust and avoids errors during the adjustment process.

[0045] The outer tooth group 20 and the inner tooth group 19 are composed of the same number of latch teeth, so that the rotation range of the screw 18 and the rotating shaft 21 is consistent, that is, the movable nut 12 moves down the same distance as the bearing seat 10 moves down, so that the movable nut and the surface of the bearing seat 10 are always kept in a squeezed state, thereby improving the stability of the rotation of the worm 5.

[0046] The rotating assembly includes a rotating rod 24 rotatably connected to the inner bottom wall of the box body 1 and a gear five 25 installed on the outside of the rotating rod 24. The gear five 25 is engaged with the ring gear 16. The rotation of the rotating rod 24 drives the gear five 25 on its outside to rotate. The gear five 25 is engaged with the ring gear 16 to rotate the ring gear 16, thereby driving the mounting ring 17 to rotate, adjusting the horizontal height of the bearing seat 10 and the movable nut 12, reducing the gap between the worm 5 and the turbine 7, and ensuring the stable rotation of the worm 5.

[0047] In actual use, the rotating shaft 21 and the screw 18 can be connected to the box body 2 by using a screw, so that the stability of the worm 5 can be improved when the height of the worm 5 is not adjusted.

Claims

1. An adjustable backlash-free worm gear reducer, comprising a housing (1), two housing covers (2) connected to the housing (1), an input shaft (4) penetrating the two housing covers (2) and the housing (1) and rotatably connected to the housing covers (2), a worm (5) mounted on the outside of the input shaft (4), an output shaft (6) rotatably connected to the housing (1), a turbine (7) mounted on the outside of the output shaft (6) and meshing with the worm (5), a bearing (9) rotatably connected to the outside of the input shaft (4), and a bearing seat (10) mounted on the outside of the bearing (9), characterized in that: An adjustment assembly is installed inside the box cover (2), and the adjustment assembly includes a screw rod (18) rotatably connected to the box cover (2) and passing through the bearing seat (10), a fixing nut (11) threadedly connected to the outside of the screw rod (18) and connected to the bottom of the bearing seat (10), and a movable nut (12) threadedly connected to the outside of the screw rod (18) and pressing the top of the bearing seat (10), a gear 1 (13) is installed on the movable nut (12), a gear 2 (14) is installed on the outside of the screw rod (18), a linkage assembly with one end meshing with the gear 1 (13) is also installed inside the box cover (2), a transmission assembly is installed on the inner wall of the box body (1), the transmission assembly intermittently meshes with the linkage assembly and the gear 2 (14), and a rotating assembly meshing with the transmission assembly is also installed on the box body (1).

2. The adjustable backlash-free worm gear reducer according to claim 1, characterized in that: An oil groove (8) is installed on the inner bottom wall of the casing (1), and one end of the turbine (7) extends into the interior of the oil groove (8).

3. The adjustable backlash-free worm gear reducer according to claim 2, characterized in that: The oil groove (8) is also connected to an oil inlet pipe having one end extending to the outside of the box body (1).

4. The adjustable backlash-free worm gear reducer according to claim 3 is characterized in that: An input end cover (3) having one end connected to the box cover (2) is installed outside the input shaft (4).

5. The adjustable backlash-free worm gear reducer according to claim 4, characterized in that: The linkage assembly comprises a rotating shaft (21) rotatably connected to the box cover (2), and a gear three (22) and a gear four (23) mounted outside the rotating shaft (21).

6. The adjustable backlash-free worm gear reducer according to claim 5, characterized in that: The gear four (23) is meshed with the gear one (13).

7. The adjustable backlash-free worm gear reducer according to claim 6, characterized in that: The linkage assembly comprises an arc-shaped support ring (15) mounted on the housing (1), a gear ring (16) rotatably connected to the arc-shaped support ring (15), a mounting ring (17) mounted on the gear ring (16), and an inner tooth group (19) and an outer tooth group (20) mounted on the mounting ring (17).

8. The adjustable backlash-free worm gear reducer according to claim 7, characterized in that: The inner tooth group (19) meshes with the second gear (14), and the outer tooth group (20) meshes with the third gear (22).

9. The adjustable backlash-free worm gear reducer according to claim 8, characterized in that: The outer tooth group (20) and the inner tooth group (19) are composed of the same number of not less than five latching teeth, and the inner tooth group (19) and the outer tooth group (20) are distributed at equal intervals on the mounting ring (17).

10. The adjustable backlash-free worm gear reducer according to claim 9, characterized in that: The rotating assembly comprises a rotating rod (24) rotatably connected to the inner bottom wall of the box body (1) and a gear five (25) mounted outside the rotating rod (24), wherein the gear five (25) is meshed with the gear ring (16).

Images