A lubricating oil circuit structure of a shift fork shift mechanism

Abstract

The utility model discloses a lubricating oil circuit structure of a shift fork shift mechanism, comprising an oil delivery pipe, a double-channel rotary joint, and an oil inlet rod. Two oil delivery pipes are respectively connected to the central long hole of the gear shaft through the inner tube and the outer tube of the double-channel rotary joint. A through hole is provided at the center of the oil inlet rod, and the central long hole is divided into two oil circuits, one of which is connected to the high-speed gear bearing and the high-speed gear connecting spline, and the other is connected to the low-speed gear bearing and the low-speed gear connecting spline. The device has a compact structure and is easy to process, and realizes full lubrication of the spline and the bearing, and a lubricating oil circuit with controllable oil quantity in different gears, and is suitable for the shift fork shift mechanism in the speed change gear box.

Description

Technical Field

[0001] The utility model relates to the technical field of speed change gear transmission devices, in particular to a lubricating oil circuit structure of a shift fork shift mechanism. Background Art

[0002] The fork shift mechanism is widely used in the speed gear transmission device. The gear pairs and the transmission shaft of different gears can be connected by adjusting the position of the spline wheel. For the connecting splines between the spline wheel and the shaft, as well as the bearings between the gears and the shaft, a good lubrication environment is required to reduce wear. However, the lubrication effect of the existing technology is poor. Due to the internal space constraints of the fork shift mechanism, it is difficult to design a forced lubrication pipeline. The existing lubrication between parts is mainly completed by splash lubrication of the gear parts. Splash lubrication has problems such as insufficient and uneven lubrication. In the absence of lubrication or insufficient lubrication, the wear of structures such as splines and gears will be aggravated, causing wear and damage, which seriously affects the transmission performance and system life of the speed gear transmission device. Utility Model Content

[0003] The utility model aims to provide a lubricating oil circuit structure of a shift fork shift mechanism in view of the defects of the prior art.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] A lubricating oil circuit structure of a shift fork shift mechanism, comprising a low-speed gear bearing connected to the outside of a gear shaft, a low-speed gear connecting spline, a high-speed gear bearing, and a high-speed gear connecting spline, characterized in that it also includes a total oil inlet adapter pipe, a first oil delivery pipe, a second oil delivery pipe, a dual-channel rotary joint, and an oil inlet rod, one end of the first oil delivery pipe is connected to the total oil inlet adapter pipe, and the other end is connected to the inner tube of the dual-channel rotary joint, one end of the second oil delivery pipe is connected to the total oil inlet adapter pipe, and the other end is connected to the outer tube of the dual-channel rotary joint, and the outer tube is connected to the end of the gear shaft through an oil inlet seat A first long hole and a second long hole connected front to back are arranged at the center of the gear shaft, the diameter of the first long hole is larger than that of the second long hole, the oil inlet rod is inserted into the first long hole, the diameter of the oil inlet rod is smaller than that of the first long hole and larger than that of the second long hole, a through hole is arranged at the center of the oil inlet rod, the outer tube is connected with the first long hole, the inner tube, the through hole and the second long hole are connected in sequence, a plurality of radial oil passages are arranged in the gear shaft, the first long hole is connected with the high-speed gear bearing and the high-speed gear connecting spline through the radial oil passage, and the second long hole is connected with the low-speed gear bearing and the low-speed gear connecting spline through the radial oil passage.

[0006] Furthermore, the oil inlet seat is provided with a central hole and peripheral holes, the inner tube is connected to the through hole of the oil inlet rod through the central hole, and the outer tube is connected to the first long hole through the peripheral hole.

[0007] Furthermore, an oil seal is provided between the central hole and the peripheral hole to separate the inner tube and the outer tube, and the oil seal is fixed in the oil inlet seat through an axial retaining ring.

[0008] Furthermore, the radial oil passage includes a first radial oil passage, a second radial oil passage, a third radial oil passage and a fourth radial oil passage, wherein two ends of the first radial oil passage are respectively connected to the low-speed gear bearing and the second long hole, two ends of the second radial oil passage are respectively connected to the low-speed gear connecting spline and the second long hole, two ends of the third radial oil passage are respectively connected to the high-speed gear connecting spline and the first long hole, and two ends of the fourth radial oil passage are respectively connected to the high-speed gear bearing and the first long hole.

[0009] Furthermore, the low-speed gear bearing includes a first bearing, a second bearing and a first distance ring arranged therebetween, the first distance ring is provided with a first annular oil groove, and the first radial oil channel is connected to the low-speed gear bearing through the first annular oil groove.

[0010] Furthermore, the high-speed gear bearing includes a third bearing and a fourth bearing and a second distance ring arranged therebetween, the second distance ring is provided with a second annular oil groove, and the fourth radial oil passage is connected to the high-speed gear bearing through the second annular oil groove.

[0011] Furthermore, a third annular oil groove is provided on the low-speed gear connecting spline, and the second radial oil passage is connected to the low-speed gear connecting spline through the third annular oil groove.

[0012] Furthermore, a fourth annular oil groove is provided on the high-speed gear connecting spline, and the third radial oil passage is connected to the high-speed gear connecting spline through the fourth annular oil groove.

[0013] Furthermore, the first oil pipeline and the second oil pipeline are respectively provided with a first fluid valve and a second fluid valve.

[0014] Compared with the prior art, the utility model has the following beneficial effects: 1. The main oil inlet adapter pipe and the dual-channel rotary joint are connected by two oil delivery pipes with fluid valves, and the lubricating oil is divided through the rotary joint, the oil inlet seat, the oil inlet rod and the long hole in the center of the gear shaft, and flows to the bearings and splines through the oil channel with the help of centrifugal force, so as to realize the controllable forced lubrication of the splines and bearings in different gears. 2. The setting of the distance ring ensures that the bearings arranged in pairs can be fully and evenly lubricated at the same time. 3. The overall structure is compact, simple, easy to process, low cost and easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the oil pipeline in the embodiment;

[0017] Figure 3 This is a schematic diagram of the structure of a dual-channel rotary joint in an embodiment;

[0018] Figure 4 for Figure 1 A partial enlarged view of point A in the middle.

[0019] Among them: 1-gear shaft, 2-low speed gear connecting spline, 3-high speed gear connecting spline, 4-total oil inlet adapter pipe, 5-first oil delivery pipe, 6-second oil delivery pipe, 7-dual channel spiral joint, 8-oil inlet rod, 9-oil inlet seat, 10-first long hole, 11-second long hole, 12-oil seal, 13-axial retaining ring, 18-first fluid valve, 19-second fluid valve, 20-clamp, 71-inner tube, 72-outer tube, 81-through hole, 91-middle Center hole, 92-circumferential hole, 141-first radial oil channel, 142-second radial oil channel, 143-third radial oil channel, 144-fourth radial oil channel, 151-first bearing, 152-second bearing, 153-third bearing, 154-fourth bearing, 161-first distance ring, 162-second distance ring, 171-first annular oil groove, 172-second annular oil groove, 173-third annular oil groove, 174-fourth annular oil groove. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings. This embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0021] Figure 1The invention shows a specific embodiment of the lubricating oil circuit structure of a shift fork shift mechanism, including a low-speed gear bearing connected to the outside of a gear shaft 1, a low-speed gear connecting spline 2, a high-speed gear bearing, a high-speed gear connecting spline 3, a total oil inlet adapter pipe 4, a first oil delivery pipe 5, a second oil delivery pipe 6, a dual-channel rotary joint 7, and an oil inlet rod 8. One end of the first oil delivery pipe 5 is connected to the total oil inlet adapter pipe 4, and the other end is connected to the inner pipe 71 of the dual-channel rotary joint 7. One end of the second oil delivery pipe 6 is connected to the total oil inlet adapter pipe 4, and the other end is connected to the outer pipe 72 of the dual-channel rotary joint 7. The outer pipe 72 is connected to the end of the gear shaft 1 through an oil inlet seat 9. The gear shaft 1 A first long hole 10 and a second long hole 11 connected front and back are provided at the center, and the diameter of the first long hole 10 is larger than that of the second long hole 11. The oil inlet rod 8 is inserted into the first long hole 10, and the diameter of the oil inlet rod 8 is smaller than that of the first long hole 10 and larger than that of the second long hole 11. A through hole 81 is provided at the center of the oil inlet rod 8, the outer tube 72 is connected with the first long hole 10, and the inner tube 71, the through hole 81 and the second long hole 11 are connected in sequence, and a plurality of radial oil passages are provided in the gear shaft 1, the first long hole 10 is connected with the high-speed gear bearing and the high-speed gear connecting spline 3 through the radial oil passage, and the second long hole 11 is connected with the low-speed gear bearing and the low-speed gear connecting spline 2 through the radial oil passage.

[0022] like Figure 2 As shown, the first oil delivery pipe 5 and the second oil delivery pipe 6 are respectively provided with a first fluid valve 18 and a second fluid valve 19. The main oil inlet adapter pipe 4 is fixed to the bracket by a clamp 20, and the bracket is connected to the housing of the fork shift mechanism to achieve the installation and fastening of the main oil inlet adapter pipe 4 and the housing.

[0023] like Figure 3 As shown, the oil inlet seat 9 is provided with a central hole 91 and a peripheral hole 92, the inner tube 71 is connected to the through hole 81 of the oil inlet rod 8 through the central hole 91, and the outer tube 72 is connected to the first long hole 10 through the peripheral hole 92. An oil seal 12 is provided between the central hole 91 and the peripheral hole 92 to separate the inner tube 71 and the outer tube 72, and the oil seal 12 is fixed in the oil inlet seat 9 through an axial retaining ring 13.

[0024] like Figure 4 As shown, the radial oil passages include a first radial oil passage 141, a second radial oil passage 142, a third radial oil passage 143 and a fourth radial oil passage 144. The two ends of the first radial oil passage 141 are respectively connected to the low-speed gear bearing and the second long hole 11, the two ends of the second radial oil passage 142 are respectively connected to the low-speed gear connecting spline 2 and the second long hole 11, the two ends of the third radial oil passage 143 are respectively connected to the high-speed gear connecting spline 3 and the first long hole 10, and the two ends of the fourth radial oil passage 144 are respectively connected to the high-speed gear bearing and the first long hole 10.

[0025] The low-speed gear bearing includes a first bearing 151 and a second bearing 152 and a first distance ring 161 disposed therebetween, a first annular oil groove 171 is disposed on the first distance ring 161, and the first radial oil passage 141 is connected to the low-speed gear bearing through the first annular oil groove 171. The high-speed gear bearing includes a third bearing 153 and a fourth bearing 154 and a second distance ring 162 disposed therebetween, a second annular oil groove 172 is disposed on the second distance ring 162, and the fourth radial oil passage 144 is connected to the high-speed gear bearing through the second annular oil groove 172. The low-speed gear connecting spline 2 is provided with a third annular oil groove 173, and the second radial oil passage 142 is connected to the low-speed gear connecting spline 2 through the third annular oil groove 173. The high-speed gear connecting spline 3 is provided with a fourth annular oil groove 174, and the third radial oil passage 143 is connected to the high-speed gear connecting spline 3 through the fourth annular oil groove 174.

[0026] When the shift fork shift mechanism works in the low gear, the low gear lubricating oil circuit is started, and the first fluid valve 18 is opened. The lubricating oil flows from the main oil inlet adapter pipe 4 through the first oil delivery pipe 5 to the inner tube 71 of the dual-channel rotary joint 7, and flows through the center hole 91 of the oil inlet seat 9 to the through hole 81 and the second long hole 11 of the oil inlet rod 8 in turn, and then flows through three groups of radial oil passages to flow through the first radial oil passage 141 to the first annular oil groove 171 at the first distance ring 161, so as to achieve lubrication of the first bearing 151 and the second bearing 152 on both sides, and then flows through the two groups of second radial oil passages 142 to the third annular groove 173, so as to achieve lubrication of the low gear connecting spline 2.

[0027] When the shift fork shift mechanism works in the high gear, the high gear lubricating oil circuit is started, and the second fluid valve 19 is opened. The lubricating oil flows from the main oil inlet adapter pipe 4 through the second oil delivery pipe 6 to the outer tube 72 of the dual-channel rotary joint 7, and flows through the circumferential hole 92 of the oil inlet seat 9 to the first long hole 10, and then is divided through three groups of radial oil passages, and flows through the fourth radial oil passage 144 to the second annular groove 172 at the second distance ring 162, so as to realize the lubrication of the third bearing 153 and the fourth bearing 154 on both sides, and flows through the two groups of third radial oil passages 143 to the fourth annular groove 174, so as to realize the lubrication of the high gear connecting spline 3.

[0028] The above specific implementation methods are only for illustrating the technical concept and structural features of the utility model, and the purpose is to enable relevant persons familiar with this technology to implement them accordingly. However, the above content does not limit the protection scope of the utility model. Any equivalent changes or modifications made based on the spirit of the utility model should fall within the protection scope of the utility model.

Claims

1. A lubricating oil circuit structure of a shift fork shift mechanism, comprising a low-speed gear bearing connected to the outside of a gear shaft (1), a low-speed gear connecting spline (2), a high-speed gear bearing, and a high-speed gear connecting spline (3), characterized in that: The gear shaft (1) further comprises a total oil inlet adapter pipe (4), a first oil delivery pipe (5), a second oil delivery pipe (6), a dual-channel rotary joint (7), and an oil inlet rod (8). One end of the first oil delivery pipe (5) is connected to the total oil inlet adapter pipe (4), and the other end is connected to an inner pipe (71) of the dual-channel rotary joint (7). One end of the second oil delivery pipe (6) is connected to the total oil inlet adapter pipe (4), and the other end is connected to an outer pipe (72) of the dual-channel rotary joint (7). The outer pipe (72) is connected to the end of the gear shaft (1) through an oil inlet seat (9). A first long hole (10) and a second long hole (11) connected front and rear are arranged at the center of the gear shaft (1). The first long hole (10) is connected to the inner pipe (71) of the dual-channel rotary joint (7). ) has a diameter greater than that of the second long hole (11); the oil inlet rod (8) is inserted into the first long hole (10); the diameter of the oil inlet rod (8) is smaller than that of the first long hole (10) and greater than that of the second long hole (11); a through hole (81) is provided at the center of the oil inlet rod (8); the outer tube (72) is connected to the first long hole (10); the inner tube (71), the through hole (81) and the second long hole (11) are connected in sequence; a plurality of radial oil passages are provided in the gear shaft (1); the first long hole (10) is connected to the high-speed gear bearing and the high-speed gear connecting spline (3) through the radial oil passage; the second long hole (11) is connected to the low-speed gear bearing and the low-speed gear connecting spline (2) through the radial oil passage.

2. The lubricating oil circuit structure of the shift fork shift mechanism according to claim 1, characterized in that: The oil inlet seat (9) is provided with a central hole (91) and a peripheral hole (92); the inner tube (71) is connected to the through hole (81) of the oil inlet rod (8) through the central hole (91); and the outer tube (72) is connected to the first long hole (10) through the peripheral hole (92).

3. The lubricating oil circuit structure of the shift fork shift mechanism according to claim 2, characterized in that: An oil seal (12) is provided between the central hole (91) and the peripheral hole (92) for separating the inner tube (71) and the outer tube (72); the oil seal (12) is fixed in the oil inlet seat (9) via an axial retaining ring (13).

4. The lubricating oil circuit structure of the shift fork shift mechanism according to claim 1, characterized in that: The radial oil passage comprises a first radial oil passage (141), a second radial oil passage (142), a third radial oil passage (143) and a fourth radial oil passage (144); two ends of the first radial oil passage (141) are respectively connected to the low-speed gear bearing and the second long hole (11); two ends of the second radial oil passage (142) are respectively connected to the low-speed gear connecting spline (2) and the second long hole (11); two ends of the third radial oil passage (143) are respectively connected to the high-speed gear connecting spline (3) and the first long hole (10); and two ends of the fourth radial oil passage (144) are respectively connected to the high-speed gear bearing and the first long hole (10).

5. The lubricating oil circuit structure of the shift fork shift mechanism according to claim 4, characterized in that: The low-speed gear bearing comprises a first bearing (151) and a second bearing (152) and a first distance ring (161) arranged therebetween; the first distance ring (161) is provided with a first annular oil groove (171); and the first radial oil passage (141) is connected to the low-speed gear bearing through the first annular oil groove (171).

6. The lubricating oil circuit structure of the shift fork shift mechanism according to claim 4, characterized in that: The high-speed gear bearing comprises a third bearing (153) and a fourth bearing (154) and a second distance ring (162) arranged therebetween, the second distance ring (162) being provided with a second annular oil groove (172), and the fourth radial oil passage (144) being connected to the high-speed gear bearing via the second annular oil groove (172).

7. The lubricating oil circuit structure of the shift fork shift mechanism according to claim 4, characterized in that: A third annular oil groove (173) is provided on the low-speed gear connecting spline (2), and the second radial oil passage (142) is connected to the low-speed gear connecting spline (2) through the third annular oil groove (173).

8. The lubricating oil circuit structure of the shift fork shift mechanism according to claim 4, characterized in that: A fourth annular oil groove (174) is provided on the high-speed gear connecting spline (3), and the third radial oil passage (143) is connected to the high-speed gear connecting spline (3) through the fourth annular oil groove (174).

9. The lubricating oil circuit structure of the shift fork shift mechanism according to claim 1, characterized in that: The first oil delivery pipe (5) and the second oil delivery pipe (6) are respectively provided with a first fluid valve (18) and a second fluid valve (19).

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