Tractor transfer case assembly

Abstract

The utility model discloses a tractor transfer case assembly, which relates to the technical field of tractor equipment and comprises a transfer case body, a transfer gear shaft is rotatably mounted on one side of the middle of the transfer case body in a penetrating manner, and a magnetic flywheel is in key connection with the outer side, far away from a power input end, of the transfer gear shaft. Two driving magnetic blocks are fixedly connected to the outer side of the magnetomotive flywheel in a vertically symmetrical mode, a lubricating oil cooling box is fixedly connected to the face, close to the magnetomotive flywheel, of the outer side of the transfer case body, and lubricating oil does not participate in lubrication after being sucked into the lubricating oil cooling box and can be cooled and precipitated in the lubricating oil cooling box. The cooled lubricating oil enters the oil pumping cylinder through the one-way oil inlet pipe, scrap iron generated by gear meshing abrasion can be precipitated at the bottom of the lubricating oil cooling box, the scrap iron in the lubricating oil is reduced while lubricating oil cooling is assisted, the gear abrasion speed is effectively reduced, and the service life of the gear is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor equipment, in particular to a transfer case assembly of a tractor. Background Art

[0002] The tractor transfer case assembly is a key component in the tractor transmission system. Its main function is to transmit the power of the engine to the various drive axles of the tractor to realize the driving and operating functions of the tractor.

[0003] When the tractor runs for too long, the heat inside the transfer case will increase, and the temperature rise will affect the lubrication effect of the internal oil. In addition, the tractor vibrates greatly. Once the internal seal of the transfer case fails, it will cause the lubricating oil to overflow, reducing the service life of the tractor. For this reason, we propose a tractor transfer case assembly. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that when the tractor runs for too long, the heat inside the transfer case will increase, and the temperature rise will affect the lubrication effect of the internal oil, and the tractor has great vibration. Once the internal seal of the transfer case fails, it will cause the lubricating oil to overflow, thereby reducing the service life of the tractor. The utility model provides a tractor transfer case assembly.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0006] A tractor transfer case assembly comprises a transfer case, wherein a transfer gear shaft is rotatably installed on one side of the middle part of the transfer case, and the outer key of the transfer gear shaft is connected and slidably sleeved with a transfer case gear, an idler shaft is rotatably installed in the upper end cover of the transfer case, and the middle key of the transfer case gear is connected and fixed with the idler, a shift head is rotatably installed on one side of the transfer case, and a shift fork is fixedly connected to one end of the shift head corresponding to the inner cavity of the transfer case, and the shift fork is sleeved on the transfer case gear, a magnetic flywheel is connected to the outer key of the transfer gear shaft away from the power input end, and two driving magnetic blocks are fixedly connected to the outer side of the magnetic flywheel symmetrically up and down, and the transfer case A lubricating oil cooling box is fixedly connected to the outer side of the oil pump cylinder near the magnetic flywheel, and an oil pump cylinder is fixedly installed on the upper end of the inner cavity of the oil pump cylinder, and a magnetic piston is movably inserted in the oil pump cylinder, and a return spring is inserted on the side of the oil pump cylinder away from the magnetic flywheel, and the return spring is against the outer side of the magnetic piston, and a one-way oil inlet pipe and a one-way oil outlet pipe are respectively arranged on the upper and lower outer walls of the oil pump cylinder away from the magnetic flywheel, and a one-way valve is arranged between the one-way oil inlet pipe and the one-way oil outlet pipe and the oil pump cylinder, the bottom of the lubricating oil cooling box is connected with the bottom of the inner cavity of the transfer case through an oil extraction pipe, and the one-way oil outlet pipe is connected with the upper end of the inner cavity of the transfer case.

[0007] Furthermore, an oil tank end cover is inserted on the outer side of the lubricating oil cooling box, and a circle of limiting convex edges is provided on the inner wall of the lubricating oil cooling box corresponding to the inner side of the oil tank end cover, and a rubber sealing pad is fixedly connected to the inner edge of the oil tank end cover.

[0008] Furthermore, an end cover pressure ring is threadedly connected to the outer end of the inner wall of the lubricating oil cooling box, and the end cover pressure ring abuts against the outer side of the oil tank end cover.

[0009] Furthermore, square protrusions are fixedly connected to both sides of the inner wall of the end cover pressure ring, and a rubber pressure pad is provided on the contact surface between the end cover pressure ring and the oil tank end cover.

[0010] Furthermore, the magnetic piston is a cylindrical structure in which the outer wall of the permanent magnet block is wrapped with a polytetrafluoroethylene bushing, and the outer wall of the magnetic piston is provided with multiple circles of sealing slip rings.

[0011] Furthermore, one end of the oil extraction pipe is arranged vertically upward in the inner cavity corresponding to the lubricating oil cooling box.

[0012] Furthermore, a steel wire mesh is fixedly connected to the middle of the inner cavity of the lubricating oil cooling box.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The utility model is provided with a shift head, which can drive the transfer case gear to slide on the transfer gear shaft by pulling the shift fork, thereby switching the meshing and separation of the transfer case gear and the idler gear, and realizing the switching of power output. Through the provision of a lubricating oil cooling box, the magnetic piston in the lubricating oil cooling box is arranged corresponding to the position of the driving magnetic block, and the magnetic poles on the opposite sides of the driving magnetic block and the magnetic piston are the same. The magnetic flywheel rotates with the transfer gear shaft, thereby driving the driving magnetic block to rotate in a circle. When the driving magnetic block moves to the uppermost position aligned with the magnetic piston, the magnetic piston is pushed away from the driving magnetic block by the magnetic force of the driving magnetic block, thereby compressing the inner cavity of the pump oil cylinder. When the driving magnetic block and the magnetic piston are staggered, the magnetic piston can be reset under the action of the reset spring, and the one-way valve at the connection between the one-way oil inlet pipe and the one-way oil outlet pipe is used to make When the magnetic piston is reset, negative pressure is generated in the inner cavity of the oil pump barrel, and the one-way oil inlet pipe sucks lubricating oil. When the magnetic piston moves away from the driving magnet, the lubricating oil sucked in the oil pump barrel can be pumped out through the one-way oil outlet pipe and sprayed toward the meshing point of the transfer case gear and the idler gear at the upper end of the transfer case inner cavity. When the oil pump barrel sucks in the lubricating oil, negative pressure is generated in the lubricating oil cooling box, so that the lubricating oil cooling box sucks in the lubricating oil from the bottom of the transfer case through the oil extraction pipe. After the lubricating oil is sucked into the lubricating oil cooling box, it does not participate in lubrication and can be cooled and precipitated in the lubricating oil cooling box. The cooled lubricating oil enters the oil pump barrel through the one-way oil inlet pipe, and iron filings generated by gear meshing wear can be precipitated at the bottom of the lubricating oil cooling box, which assists in cooling the lubricating oil while reducing the iron filings in the lubricating oil, effectively reducing the wear rate of the gears and increasing the service life of the gears.

[0015] 2. The utility model provides a limiting convex edge, so that the outer side of the lubricating oil cooling box is sealed after the oil tank end cover is pressed, which is convenient for cleaning and maintenance of the inner cavity of the lubricating oil cooling box after disassembly. The end cover pressure ring is provided, and the end cover pressure ring can press the outer side of the oil tank end cover through threaded cooperation, which is convenient for fixing the outer side of the oil tank end cover.

[0016] 3. The utility model provides an oil extraction pipe, with one end of the oil extraction pipe vertically facing upward and corresponding to the inner cavity of the lubricating oil cooling box suspended in the air, so as to intercept iron filings after the lubricating oil is precipitated, and effectively prevent the iron filings at the bottom of the lubricating oil cooling box from flowing back into the inner cavity of the transfer case through the oil extraction pipe, thereby ensuring the cleanliness of the lubricating oil in the inner cavity of the transfer case. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a side sectional view of the utility model;

[0018] Figure 2 It is a front cross-sectional view of the utility model;

[0019] Figure 3 This utility model Figure 2 The enlarged view of point A in the middle;

[0020] Figure 4 This utility model Figure 2 Enlarged view of point B in the middle.

[0021] Figure numerals: 1. transfer case; 2. transfer case gear; 3. idler shaft; 4. shift head; 5. transfer gear shaft; 6. idler; 7. magnetic flywheel; 8. driving magnet; 9. lubricating oil cooling box; 10. pump oil cylinder; 11. magnetic piston; 12. return spring; 13. one-way oil inlet pipe; 14. one-way oil outlet pipe; 15. oil extraction pipe; 16. oil tank end cover; 17. end cover pressure ring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0023] See also Figure 1 - Figure 4 The utility model provides a tractor transfer case assembly, including a transfer case body 1, a transfer gear shaft 5 is rotatably installed on one side of the middle part of the transfer case body 1, and the outer side key of the transfer gear shaft 5 is connected and slidably sleeved with a transfer case gear 2, an idler shaft 3 is rotatably installed in the upper end cover of the transfer case body 1, and the middle part of the transfer case gear 2 is key-connected and fixed with an idler 6, a shift head 4 is rotatably installed on one side of the transfer case body 1, and the shift head 4 is fixedly connected with a shift fork at one end corresponding to the inner cavity of the transfer case body 1, and the shift fork is sleeved on the transfer case gear 2, the outer side key of the transfer gear shaft 5 away from the power input end is connected with a magnetic flywheel 7, and the outer side of the magnetic flywheel 7 is symmetrically fixedly connected with two driving magnetic blocks 8, and the outer side of the transfer case body 1 is fixedly connected to the magnetic flywheel 7. It is connected to a lubricating oil cooling box 9, and the outer shell of the transfer case 1 is made of austenitic stainless steel. An oil pump cylinder 10 is fixedly installed on the upper end of the inner cavity of the lubricating oil cooling box 9, and a magnetic piston 11 is movably inserted in the oil pump cylinder 10, and a return spring 12 is inserted on the side of the oil pump cylinder 10 away from the magnetic flywheel 7, and the return spring 12 is against the outer side of the magnetic piston 11. A one-way oil inlet pipe 13 and a one-way oil outlet pipe 14 are respectively arranged on the upper and lower outer walls of the side of the oil pump cylinder 10 away from the magnetic flywheel 7, and a one-way valve is arranged between the one-way oil inlet pipe 13 and the one-way oil outlet pipe 14 and the oil pump cylinder 10. The bottom of the lubricating oil cooling box 9 is connected with the bottom of the inner cavity of the transfer case 1 through an oil extraction pipe 15, and the one-way oil outlet pipe 14 is connected with the upper end of the inner cavity of the transfer case 1.

[0024] In the present embodiment, preferably, an oil tank end cover 16 is inserted into the outer side of the lubricating oil cooling box 9, and a circle of limiting convex edges are provided on the inner wall of the lubricating oil cooling box 9 corresponding to the inner side of the oil tank end cover 16, and a rubber sealing gasket is fixedly connected to the inner edge of the oil tank end cover 16; by means of the provided limiting convex edges, the outer side of the lubricating oil cooling box 9 is sealed after the oil tank end cover 16 is pressed, so that the inner cavity of the lubricating oil cooling box 9 can be cleaned and maintained conveniently after disassembly.

[0025] In this embodiment, preferably, the outer end of the inner wall of the lubricating oil cooling box 9 is threadedly connected with an end cover pressure ring 17, and the end cover pressure ring 17 is abutted against the outer side of the oil tank end cover 16; through the provision of the end cover pressure ring 17, the end cover pressure ring 17 can press the outer side of the oil tank end cover 16 through threaded cooperation, thereby facilitating the fixation of the outer side of the oil tank end cover 16.

[0026] In this embodiment, preferably, square protrusions are fixedly connected to both sides of the inner wall of the end cover pressure ring 17, and a rubber pressure pad is provided on the contact surface between the end cover pressure ring 17 and the tank end cover 16; the provided square protrusions facilitate the fixed square protrusions to exert force when rotating the end cover pressure ring 17, thereby facilitating the rotation of the end cover pressure ring 17.

[0027] In this embodiment, preferably, the magnetic piston 11 is a cylindrical structure in which the outer wall of the permanent magnet block is wrapped with a polytetrafluoroethylene bushing, and the outer wall of the magnetic piston 11 is provided with multiple circles of sealing slip rings; the polytetrafluoroethylene bushing is provided to reduce the friction and wear between the outer wall of the magnetic piston 11 and the inner wall of the pump oil cylinder 10, thereby improving the service life and sensitivity of the magnetic piston 11, and the multiple circles of sealing rings are provided to ensure the air tightness of the magnetic piston 11 when it moves.

[0028] In the present embodiment, preferably, the oil extraction pipe 15 is vertically arranged with one end corresponding to the inner cavity of the lubricating oil cooling box 9; through the arranged oil extraction pipe 15, the oil extraction pipe 15 is suspended with one end corresponding to the inner cavity of the lubricating oil cooling box 9 vertically, which is convenient for intercepting iron filings after the lubricating oil is precipitated, and effectively avoids the iron filings at the bottom of the lubricating oil cooling box 9 from flowing back into the inner cavity of the transfer case 1 through the oil extraction pipe 15, thereby ensuring the cleanliness of the lubricating oil in the inner cavity of the transfer case 1.

[0029] In the present embodiment, preferably, a steel wire mesh is fixedly connected to the middle part of the inner cavity of the lubricating oil cooling box 9; through the steel wire mesh, the steel wire mesh is arranged between the ports of the one-way oil inlet pipe 13 and the oil extraction pipe 15, and the lubricating oil entering the one-way oil inlet pipe 13 is filtered to prevent iron filings from entering the pump oil cylinder 10 through the one-way oil inlet pipe 13.

[0030] The working principle and use process of the utility model are as follows: when the device is used, the shift head 4 is set, and the shift head 4 can drive the transfer case gear 2 to slide on the transfer gear shaft 5 by pulling the shift fork, thereby switching the meshing and separation of the transfer case gear 2 and the idler gear 6, and realizing the switching of power output. Through the lubricating oil cooling box 9, the magnetic piston 11 in the lubricating oil cooling box 9 is set corresponding to the position of the driving magnet 8, and the magnetic poles of the driving magnet 8 and the magnetic piston 11 on the opposite side are the same. The magnetic flywheel 7 rotates with the transfer gear shaft 5, thereby driving the driving magnet 8 to rotate in a circle. When the driving magnet 8 moves to the uppermost position aligned with the magnetic piston 11, the magnetic piston 11 is pushed away from the driving magnet 8 by the magnetic force of the driving magnet 8, thereby compressing the inner cavity of the pump oil cylinder 10. When the driving magnet 8 and the magnetic piston 11 are staggered, the magnetic piston 11 can be reset under the action of the reset spring 12, and the one-way oil inlet pipe 13 and the one-way oil outlet pipe 1 The one-way valve at the connection of 4 makes negative pressure generated in the inner cavity of the pump oil cylinder 10 when the magnetic piston 11 is reset, and the one-way oil inlet pipe 13 sucks lubricating oil. When the magnetic piston 11 moves away from the driving magnetic block 8, the lubricating oil sucked in the pump oil cylinder 10 can be pumped out through the one-way oil outlet pipe 14 and sprayed toward the meshing position of the transfer case gear 2 and the idler gear 6 at the upper end of the inner cavity of the transfer case 1. When the pump oil cylinder 10 sucks the lubricating oil, negative pressure is generated in the lubricating oil cooling box 9, so that the lubricating oil cooling box 9 sucks the lubricating oil from the bottom of the transfer case 1 through the oil extraction pipe 15. After the lubricating oil is sucked into the lubricating oil cooling box 9, it does not participate in lubrication and can be cooled and precipitated in the lubricating oil cooling box 9. The cooled lubricating oil enters the pump oil cylinder 10 through the one-way oil inlet pipe 13, and the iron chips generated by the meshing wear of the gears can be precipitated at the bottom of the lubricating oil cooling box 9, which helps to cool the lubricating oil while reducing the iron chips in the lubricating oil, effectively reducing the wear rate of the gears and increasing the service life of the gears.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tractor transfer case assembly, comprising a transfer case (1), a transfer gear shaft (5) is rotatably mounted on one side of the middle of the transfer case (1), and a transfer case gear (2) is slidably sleeved on the outer side of the transfer gear shaft (5), an idler shaft (3) is rotatably mounted in the upper end cover of the transfer case (1), and a middle part of the transfer case gear (2) is key-connected to a fixed idler (6), a shift head (4) is rotatably mounted on one side of the transfer case (1), and a shift fork is fixedly connected to one end of the shift head (4) corresponding to the inner cavity of the transfer case (1), and the shift fork is sleeved on the transfer case gear (2), characterized in that: The outer key of the transfer gear shaft (5) away from the power input end is connected to a magnetic flywheel (7), and two driving magnetic blocks (8) are fixedly connected to the outer side of the magnetic flywheel (7) symmetrically in the upper and lower directions. The outer side of the transfer case (1) close to the magnetic flywheel (7) is fixedly connected to a lubricating oil cooling box (9), and an oil pump cylinder (10) is fixedly installed at the upper end of the inner cavity of the lubricating oil cooling box (9), and a magnetic piston (11) is movably inserted in the oil pump cylinder (10), and a return spring is inserted on the side of the oil pump cylinder (10) away from the magnetic flywheel (7). (12), and the return spring (12) abuts against the outer side of the magnetic piston (11); the outer wall of the pump oil cylinder (10) away from the magnetic flywheel (7) is provided with a one-way oil inlet pipe (13) and a one-way oil outlet pipe (14) at the upper and lower sides, respectively; and a one-way valve is provided between the one-way oil inlet pipe (13) and the one-way oil outlet pipe (14) and the pump oil cylinder (10); the bottom of the lubricating oil cooling box (9) is connected to the bottom of the inner cavity of the transfer case (1) through the oil extraction pipe (15), and the one-way oil outlet pipe (14) is connected to the upper end of the inner cavity of the transfer case (1).

2. A tractor transfer case assembly according to claim 1, characterized in that: An oil tank end cover (16) is inserted on the outer side of the lubricating oil cooling box (9), and a circle of limiting convex edges is arranged on the inner wall of the lubricating oil cooling box (9) corresponding to the inner side of the oil tank end cover (16), and a rubber sealing pad is fixedly connected to the inner edge of the oil tank end cover (16).

3. A tractor transfer case assembly according to claim 2, characterized in that: The outer end of the inner wall of the lubricating oil cooling box (9) is threadedly connected with an end cover pressing ring (17), and the end cover pressing ring (17) abuts against the outer side of the oil tank end cover (16).

4. A tractor transfer case assembly according to claim 3, characterized in that: Square protrusions are fixedly connected to both sides of the inner wall of the end cover pressure ring (17), and a rubber pressure pad is provided on the contact surface between the end cover pressure ring (17) and the oil tank end cover (16).

5. A tractor transfer case assembly according to claim 1, characterized in that: The magnetic piston (11) is a cylindrical structure in which the outer wall of a permanent magnet block is wrapped with a polytetrafluoroethylene bushing, and the outer wall of the magnetic piston (11) is provided with multiple circles of sealing slip rings.

6. A tractor transfer case assembly according to claim 1, characterized in that: One end of the oil extraction pipe (15) is arranged vertically upward in the inner cavity corresponding to the lubricating oil cooling box (9).

7. A tractor transfer case assembly according to claim 6, characterized in that: A steel wire mesh is fixedly connected to the middle of the inner cavity of the lubricating oil cooling box (9).

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