Variable-axle-distance and variable-axle-length transmission case for speed reducer test bench

Abstract

The invention discloses a variable axle distance and axle length transmission case for a speed reducer test board. The test bench comprises a structure assembly, a first gear assembly, an idler shaft assembly, a second gear assembly, a main shaft assembly, a movable box body assembly, a soft box body and the like, the transmission box is located on the speed reducer test bench, when different speed reducers are tested, the transmission box can adapt to different input shaft distances and shaft lengths by rotating a handle on the transmission box, and the test efficiency is improved. The defect that a new gear transmission box and a new connecting base plate need to be manufactured when a new speed reducer is tested every time is overcome, and the testing cost and time are greatly reduced.

Description

Technical Field

[0001] The invention relates to the field of development, design and testing of reducers, and in particular to a variable wheelbase and shaft length transmission box for a reducer test bench. Background Art

[0002] Before a reducer leaves the factory, it must be installed on a test bench and tested at full power. Because the distance between the input shaft and the flange surface, as well as the distance between the input shaft end and the output shaft, varies with reducer specifications, testing each reducer requires designing and manufacturing a matching transmission case, which is time-consuming and costly. Therefore, it is highly desirable to develop a variable wheelbase and shaft length transmission case for use on a reducer test bench. This would accommodate testing of all reducers within a specified specification range, reduce testing costs, and shorten testing cycles. Summary of the Invention

[0003] In view of this, the present invention proposes a variable wheelbase and shaft length transmission box for a reducer test bench. By adjusting the screw handle, this test box can adapt to the distance between the input shaft and the flange surface, and the distance between the input shaft end and the output shaft of different reducers, and perform operation tests under full load conditions.

[0004] The purpose of the present invention is achieved through the following technical solutions: The mechanism includes a structural component 10, a gear component 1 20, an idler shaft frame component 30, a gear component 2 40, a main shaft component 50, a movable box component 60, and a soft box 80; the structural component 10 is composed of a movable box traction screw and a handle 11, a fixed box 12, a bracket frame 13, and a connecting pad 15, and T-slots 15 are processed on both sides of the upper side of the bracket frame; the gear component 1 20 is composed of an input gear 21, a gear component 1 retainer 22, an idler wheel 1 23, and an input shaft 24; the idler wheel shaft component 30 is composed of an idler wheel shaft 1 31, an idler wheel shaft retainer 33, and an idler wheel shaft 2 34, and the idler wheel shaft retainer 33 is upper and lower. The middle part of the surface is machined with an idler wheel shaft retainer convex end 32; gear assembly 2 40 is composed of idler wheel 2 41, gear assembly 2 retainer 42, output gear 43, and internal spline main shaft 44; the spindle assembly 50 is composed of a coupling 51, an external spline main shaft 52, an external spline main shaft traction screw and a handle 53; the movable box assembly 70 is composed of T-slot fastening bolts and nuts 71, a movable box body 72, a movable box traction screw nut 74, an external spline main shaft traction screw frame 75, an external spline main shaft traction screw half nut 76, and a screw clamping plate 77. Box guide grooves 74 are machined in the upper and lower middle parts of the movable box 73; Furthermore, the fixed box body 12 is fixed to the upper surface of the bracket frame 13 by bolts, the connecting plate 15 is fixed to the left side of the bracket frame 13 by bolts, and the reducer 60 to be tested is fixed to the left side of the connecting plate 15 by bolts; the movable box body traction screw and handle 11 are located on the top of the fixed box body 12 and can only rotate but not move; Furthermore, the input shaft 24 of the gear assembly 1 20 is connected to the bracket frame 13 via relevant bearings and can only rotate but not move. The input shaft 24 and the input gear 21 are connected as a whole via a flat key. When the wheelbase between the main shaft assembly 50 and the input shaft 24 is adjusted, the gear assembly 1 retainer 22 can rotate a certain angle around the input gear 21, and the idler gear 1 23 is engaged with the input gear 21. Furthermore, the idler axle 1 31, the idler axle holder 33, and the idler axle 2 34 of the idler axle assembly 30 are fixed together. The idler gear 1 23 rotates around the idler axle 31 via a bearing. When the wheelbase between the main shaft assembly 50 and the input shaft 24 is adjusted, the gear assembly 1 holder 22 can rotate at a certain angle around the idler axle 1 31. Furthermore, the idler gear 41 rotates around the idler gear shaft 34 via a bearing and meshes with the output gear 43. The output gear 43 is connected to the internal spline main shaft 44 via a flat key. When adjusting the wheelbase between the main shaft assembly 50 and the input shaft 24, the gear assembly 2 retainer 42 can rotate at a certain angle around the idler gear shaft 34. Furthermore, the external splined main shaft 52 is connected to the internal splined main shaft 44 by a spline, and the two can move relative to each other but cannot rotate relative to each other; the lower end of the external splined main shaft is connected to the coupling 51 as a whole, and the upper end is connected to the external splined main shaft traction screw and handle 53 through a bearing, and the two can rotate relative to each other but cannot move; Furthermore, the movable box assembly 70 is connected to the structural assembly 10 by means of T-slot fastening bolts and nuts 71. When testing different reducers, it is necessary to loosen the T-slot fastening bolts and nuts 71 to adjust the wheelbase. After the adjustment is completed, tighten the bolts; Furthermore, the idler axle holder convex end 32 is stuck in the box guide groove 73 inside the box body, so that the idler axle assembly 30 can only move along the fixed track. When adjusting the wheelbase of the main shaft assembly 50 and the input shaft 24, the idler axle assembly 30 rotates at a certain angle with the idler axle holder convex end (31) as the center and moves a maximum of 70 mm. The movable box traction screw nut 74 is welded and fixed to the top surface of the fixed box body 12, and cooperates with the movable box traction screw and the handle 11. When rotating, the movable box body assembly 70 can be moved; Furthermore, the external spline spindle traction screw frame 75 is located on the top surface of the movable box body 72 and is connected as a whole by bolts. The upper part of the frame is processed with an external spline spindle traction screw half nut 76, and the other half is replaced by a screw clamping plate 77. This half nut cooperates with the external spline spindle traction screw and the handle 53. When the external spline spindle traction screw and the handle 53 are rotated, the spindle assembly 50 can be moved up and down. When the two bolts on the screw clamping plate 77 are tightened, the external spline spindle traction screw and the handle 53 can be locked. Furthermore, the soft box 80 connects the fixed box 12 and the movable box body 72 and is retractable to prevent the lubricating oil from leaking; The beneficial effects of the present invention are mainly reflected in: This invention designs a variable wheelbase and shaft length transmission box for a reducer test bench. By adjusting the lead screw handle, the test bench can adapt to the distance between the input shaft and flange surface, and the distance between the input shaft end and the output shaft, for different reducers, allowing for full-load operation testing. This invention overcomes the previous drawbacks of requiring a redesigned transmission box and requiring a long and costly process to test a new reducer model. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] The accompanying drawings that constitute the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 the institution as a whole; Figure 2 Structural components and box movable components; Figure 3 Gear assemblies one and two, idler wheel shaft assembly, main shaft assembly; Figure 4 The state of the gear set when it is contracted and extended; Figure 5 Comparison of the overall mechanism when testing the largest and smallest reducers; Figure 6 Spindle assembly cross-section and different views; Figure 7 Overall diagram of the organization; In the picture: 10. Structural assembly, 11. Movable housing, traction screw and handle, 12. Fixed housing, 13. Bracket, 14. T-slot, 15. Connecting plate, 20. Gear assembly 1, 21. Input gear, 22. Gear assembly 1 retainer, 23. Idle pulley 1, 24. Input shaft, 30. Idle pulley shaft assembly, 31. Idle pulley shaft 1, 32. Idle pulley shaft retainer convex end, 33. Idle pulley shaft retainer, 34. Idle pulley shaft 2, 40. Gear assembly 2, 41. Idle pulley 2, 42. Gear assembly 2 retainer, 43. Output gear, 44. Internal spline spindle, 50. Spindle assembly, 51. Coupling, 52. External spline spindle, 53. External spline spindle traction screw and handle, 60. Reducer being tested, 70. Movable housing assembly, 71. T-slot fastening bolts and nuts, 72. Movable housing body, 73. Housing guide groove, 74. Movable housing traction screw nut, 75. External spline spindle traction screw frame, 76. External spline spindle traction screw half nut, 77. Screw clamping plate, 80. Flexible housing. DETAILED DESCRIPTION

[0006] When a new reducer needs to be tested, first drill a new connection hole on the connecting plate, install the new reducer on it with bolts, and ensure that the output shaft of the reducer is coaxial with the center hole of the connecting plate.

[0007] 2. Loosen the T-slot fastening bolts and nuts, and loosen the fastening bolts on the screw clamping plate.

[0008] 3. Turn the movable box traction screw and handle. The screw cooperates with the movable box traction screw nut to move the movable box assembly horizontally. When the main shaft assembly is coaxial with the input shaft of the reducer being tested, tighten the T-slot fastening bolts and nuts. According to the design, the horizontal movement range of the main shaft assembly is 0-140mm.

[0009] 4. Turn the external spline spindle traction screw and handle, which can move the coupling axially. After the coupling and the input shaft of the reducer to be tested are connected, tighten the fastening bolts on the screw clamp to fix the external spline spindle traction screw and handle. According to the design, the axial movement range of the external spline spindle is 0-390mm.

[0010] The transmission process of the five-piece transmission box is as follows: the external motor transmits power to the input gear, and the input gear engages with the idler wheel 1, idler wheel 2, and output gear in sequence. Since the convex end of the idler wheel shaft retainer is stuck in the box guide groove of the movable box body, it can move in the horizontal direction and can rotate at a small angle. Therefore, when the distance between the center axis of the input gear and the center axis of the main shaft assembly changes, it can still ensure that the power is transmitted to the internal spline main shaft with almost no loss. The internal spline main shaft then transmits the power to the external spline main shaft, and finally transmits it to the input shaft of the reducer being tested through the coupling.

[0011] It should be understood that the detailed description of the technical solutions of the present invention using the preferred embodiments above is illustrative and not restrictive. A person skilled in the art, after reading the present specification, may modify the technical solutions described in the embodiments or replace some of the technical features therein with equivalents, and such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A variable wheelbase and axis length transmission box for a reducer test bench, characterized by: The mechanism comprises a structural assembly (10), a first gear assembly (20), an idler wheel shaft assembly (30), a second gear assembly (40), a main shaft assembly (50), a movable box assembly (70), and a soft box (80); The structural assembly (10) is composed of a movable box body, a traction screw and a handle (11), a fixed box body (12), a bracket frame body (13), and a connecting pad (15). T-shaped grooves (15) are processed on both sides of the upper side of the bracket frame body. The gear assembly 1 (20) is composed of an input gear (21), a gear assembly 1 retainer (22), an idler wheel 1 (23), and an input shaft (24); The idler axle assembly (30) is composed of an idler axle 1 (31), an idler axle holder (33), and an idler axle 2 (34). An idler axle holder convex end (32) is machined in the middle of the upper and lower surfaces of the idler axle holder (33). The gear assembly 2 (40) is composed of an idler gear 2 (41), a gear assembly 2 retainer (42), an output gear (43), and an internal spline main shaft (44); The spindle assembly (50) is composed of a coupling (51), an external spline spindle (52), an external spline spindle traction screw and a handle (53); The movable box assembly (70) is composed of a T-slot fastening bolt and nut (71), a movable box body (72), a movable box traction screw nut (74), an external spline spindle traction screw frame (75), an external spline spindle traction screw half nut (76), and a screw clamping plate (77). Box guide grooves (74) are processed in the upper and lower middle parts of the movable box (73).

2. The variable wheelbase and axis length transmission box for a reducer test bench according to claim 1, characterized in that: The fixed box body (12) is fixed to the upper surface of the bracket frame body (13) by bolts, the connecting pad (15) is fixed to the left side of the bracket frame body (13) by bolts, and the speed reducer (60) to be tested is fixed to the left side of the connecting pad (15) by bolts; the movable box body traction screw and the handle (11) are located on the top of the fixed box body (12) and can only rotate but not move; The input shaft (24) of the gear assembly (20) is connected to the bracket frame (13) through the relevant bearings and can only rotate but not move. The input shaft (24) and the input gear (21) are connected as a whole through a flat key. When the wheelbase of the main shaft assembly (50) and the input shaft (24) is adjusted, the gear assembly retainer (22) can rotate at a certain angle with the input gear (21) as the center, and the idler wheel (23) is engaged with the input gear (21); The idler wheel shaft assembly (30) includes an idler wheel shaft 1 (31), an idler wheel shaft retainer (33), and an idler wheel shaft 2 (34) fixed together. The idler wheel 1 (23) rotates around the idler wheel shaft 1 (31) via a bearing. When the wheelbase between the main shaft assembly (50) and the input shaft (24) is adjusted, the gear assembly 1 retainer (22) can rotate at a certain angle with the idler wheel shaft 1 (31) as the center. The idler wheel 2 (41) rotates around the idler wheel shaft 2 (34) through a bearing and meshes with the output gear (43). The output gear (43) is connected to the internal spline main shaft (44) through a flat key. When the wheelbase of the main shaft assembly (50) and the input shaft (24) is adjusted, the gear assembly 2 retainer (42) can rotate at a certain angle with the idler wheel shaft 2 (34) as the center. The outer spline main shaft (52) and the inner spline main shaft (44) are connected by splines, and the two can move relative to each other but cannot rotate relative to each other; the lower end of the outer spline main shaft is connected to the coupling (51) as a whole, and the upper end is connected to the outer spline main shaft traction screw and the handle (53) through a bearing, and the two can rotate relative to each other but cannot move; The movable box assembly (70) is connected to the structural assembly (10) through T-slot fastening bolts and nuts (71). When testing different reducers, it is necessary to loosen the T-slot fastening bolts and nuts (71) to adjust the wheelbase. After the adjustment is completed, the bolts are tightened; The idler axle holder convex end (32) is stuck in the box guide groove (73) inside the box body, so that the idler axle assembly (30) can only move along the fixed track. When the wheelbase of the main shaft assembly (50) and the input shaft (24) is adjusted, the idler axle assembly (30) rotates at a certain angle with the idler axle holder convex end (31) as the center and moves a maximum of 70 mm. The movable box traction screw nut (74) is welded and fixed to the top surface of the fixed box body (12), and cooperates with the movable box traction screw and the handle (11). When rotating, the movable box body assembly (70) can be moved; The external spline spindle traction screw frame (75) is located on the top surface of the movable box body (72) and is connected as a whole by bolts. The upper part thereof is processed with an external spline spindle traction screw half nut (76), and the other half is replaced by a screw clamping plate (77). This half nut cooperates with the external spline spindle traction screw and the handle (53). When the external spline spindle traction screw and the handle (53) are rotated, the spindle assembly (50) can be moved up and down. When the two bolts on the screw clamping plate (77) are tightened, the external spline spindle traction screw and the handle (53) can be locked. The soft box (80) is connected to the fixed box (12) and the movable box body (72) and is retractable to prevent leakage of lubricating oil.

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