Tractor gearbox upper cover unit

Abstract

The utility model relates to the technical field of tractor speed changing upper covers, in particular to a tractor speed changing box upper cover unit which comprises a speed changing upper cover, two speed changing control shells are fixedly arranged on the speed changing upper cover, oil seal seats are fixedly arranged on the speed changing control shells, and a transmission rod and a gear selecting shifting block are arranged in the oil seal seats in a rotating mode in the first direction. A gear selecting rocker arm is rotationally arranged on one side of the speed changing control shell in the second direction, and the first direction and the second direction do not interfere with each other. According to the tractor gearbox upper cover unit, two speed change control shells are fixedly arranged on a speed change upper cover, oil seal seats are fixedly arranged on the speed change control shells, transmission rods and gear selecting shifting blocks are rotationally arranged in the oil seal seats in the first direction, and gear selecting rocker arms are rotationally arranged on one sides of the speed change control shells in the second direction; the first direction and the second direction do not interfere with each other, one end of the transmission rod and one end of the gear selecting rocker are fixedly connected with the gear shifting rocker perpendicular to the transmission rod, and therefore space can be saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tractor transmission upper cover technical field, especially for tractor transmission upper cover unit. BACKGROUND

[0002] In recent years, tractor product development speed is faster in our country, especially big horsepower tractor, the user for cab comfort degree and space aspect's requirement unceasingly improves, in order to save space, develop new transmission upper cover. CONTENT OF UTILITY MODEL

[0003] The utility model discloses a tractor transmission upper cover unit, which solves the problems in the related art.

[0004] In order to realize the above-mentioned purpose, according to one aspect of the utility model, a tractor transmission upper cover unit is provided, which comprises a transmission upper cover, two transmission control housings are fixedly arranged on the transmission upper cover, an oil seal seat is fixedly arranged on the transmission control housing, a transmission rod and a gear selection knob are rotatably arranged in the oil seal seat along a first direction, a gear selection rocker is rotatably arranged on one side of the transmission control housing along a second direction, the first direction and the second direction do not interfere with each other, and a gear shift rocker is fixedly connected to one end of the transmission rod and the gear selection rocker perpendicularly.

[0005] Further, an oil seal groove in the form of a ring is formed in the inner wall of the transmission control housing, and an oil seal is fixedly arranged in the oil seal groove and tightly contacts the outer wall of the oil seal seat.

[0006] Further, an oil seal pressing plate is fixedly arranged on one side of the oil seal seat, and screw holes are symmetrically formed in the two sides of the oil seal pressing plate.

[0007] Further, a gear selection knob is slidably arranged at one end of the transmission rod in the transmission control housing, a gear selection reset spring is fixedly arranged on the transmission rod, and a thrust washer is fixedly connected to the two ends of the gear selection reset spring, one of the thrust washers is fixedly connected to the outer wall of the transmission rod, and the other thrust washer is fixedly connected to the side wall of the gear selection knob.

[0008] Further, a connecting plate is fixedly connected to the bottom of the gear selection rocker, one end of the connecting plate is rotatably connected to the bottom of the gear selection knob, and a sliding rod is slidably arranged in the transmission control housing close to the gear selection knob.

[0009] Further, when the gear selection operation is performed, the gear selection knob rotates synchronously with the transmission rod, and when the gear shift operation is performed, the gear selection knob slides on the transmission rod.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The tractor gearbox upper cover unit is characterized in that two speed control housings are fixedly arranged on the speed control upper cover, an oil seal seat is fixedly arranged on the speed control housing, a transmission rod and a gear selection knob are rotatably arranged in the oil seal seat along a first direction, a gear selection rocker is rotatably arranged on one side of the speed control housing along a second direction, the first direction and the second direction do not interfere with each other, and the transmission rod and the gear selection rocker are both fixedly connected with a gear shifting rocker which is perpendicular to the transmission rod and the gear selection rocker. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a tractor gearbox upper cover unit overall structure schematic view in the preferred embodiment of the present application;

[0013] Figure 2 It is a tractor gearbox upper cover unit overall structure plan view in the preferred embodiment of the present application;

[0014] Figure 3 It is an A-A view of the preferred embodiment of the present application Figure 2 .

[0015] Figure 4 It is a B-B sectional view of the preferred embodiment of the present application Figure 2 .

[0016] ILLUSTRATIVE DESCRIPTION

[0017] 1, speed control upper cover; 2, speed control housing; 3, oil seal seat; 4, oil seal pressing plate; 6, gear shifting rocker; 7, transmission rod; 8, oil seal groove; 9, thrust washer; 10, gear selection reset spring; 11, gear selection knob; 12, gear selection rocker. DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined purposes, the specific embodiments, structures, features and effects according to the present application will be described in detail below in combination with the drawings and preferred embodiments.

[0019] Please refer to Figures 1-4 , the present embodiment aims to provide a tractor gearbox upper cover unit, which comprises a speed control upper cover 1, two speed control housings 2 are fixedly arranged on the speed control upper cover 1, an oil seal seat 3 is fixedly arranged on the speed control housing 2, a transmission rod 7 and a gear selection knob 11 are rotatably arranged in the speed control housing 2 along a first direction, a gear selection rocker 12 is rotatably arranged on one side of the speed control housing 2 along a second direction, the first direction and the second direction do not interfere with each other, and the transmission rod 7 and the gear selection rocker 12 are both fixedly connected with a gear shifting rocker 6 which is perpendicular to the transmission rod 7 and the gear selection rocker 12.

[0020] An oil seal groove 8 in the shape of a ring is formed in the inner wall of the gear shift control housing 2, and an oil seal is fixedly arranged in the oil seal groove 8, and the oil seal is in close contact with the outer wall of the oil seal seat 3, for preventing oil leakage.

[0021] An oil seal pressing plate 4 is fixedly arranged on one side of the oil seal seat 3, and the main function of the oil seal pressing plate 4 is to seal the oil seal in the oil seal seat 3.

[0022] One end of the transmission rod 7 located in the gear shift control housing 2 is slidingly provided with a gear selection knob 11, the transmission rod 7 is fixedly provided with a gear selection reset spring 10, and the gear selection reset spring 10 is fixedly connected with a thrust washer 9 at both ends, one of which is fixedly connected with the outer wall of the transmission rod 7, and the other is fixedly connected with the side wall of the gear selection knob 11, which can keep the stable connection between the gear selection knob 11 and the transmission rod 7.

[0023] The gear selection rocker arm 12 is fixedly connected with a connecting plate at the bottom, one end of the connecting plate is rotatably connected with the bottom of the gear selection knob 11, and a sliding rod is slidingly arranged in the gear shift control housing 2 close to the gear selection knob 11, and a knob is fixedly arranged on the sliding rod.

[0024] During gear selection operation, the gear shift rocker arm 6 at one end of the transmission rod 7 is rotated to drive the transmission rod 7 to rotate, and the gear selection knob 11 rotates synchronously with the transmission rod 7, and the knob on the sliding rod is pushed when the gear selection knob 11 rotates, which drives the sliding rod to move forward and backward, realizing gear selection action.

[0025] During gear shift operation, the gear shift rocker arm 6 on the gear selection rocker arm 12 is rotated to drive the gear selection rocker arm 12 to rotate, and since the connecting plate is fixedly connected at the bottom, the connecting plate rotates with it, and since the connecting plate is rotatably connected with the gear selection knob 11, the rotation of the gear selection knob 11 can drive the gear selection knob 11 to slide on the transmission rod 7, and the gear selection reset spring 10 is compressed in this process, and the gear selection knob 11 moves back and forth between the knobs to realize gear shift action.

[0026] After each gear shift operation is completed, the gear selection reset spring 10 restores the gear selection knob 11 to the initial position by using its elastic force, which is a key step to ensure that the tractor transmission can accurately return to the neutral gear or the preset gear, thereby avoiding potential problems caused by misoperation or gear confusion; the gear selection reset spring 10 not only restores the initial position, but also provides the necessary stable force during the entire gear shift and gear selection process, which helps to buffer the impact during gear shift and improves the durability and service life of the transmission.

[0027] The above are only the preferred embodiments of the present application, and are not intended to limit the present application in any form, although the present application has been disclosed as above with the preferred embodiments, however, it is not intended to limit the present application, any person skilled in the art, without departing from the technical scheme of the present application, can make some changes or modifications to the above disclosed technical content as equivalent embodiments, but as long as it does not depart from the technical scheme of the present application, according to the technical essence of the present application, any modification, equivalent change and modification of the above embodiments are still within the scope of the technical scheme of the present application.

Claims

1. A tractor gearbox upper cover unit, comprising a gearbox upper cover (1), two gearbox operation housings (2) are fixedly arranged on the gearbox upper cover (1), characterized in that, The variable speed operation control shell (2) is fixedly provided with an oil seal seat (3), the oil seal seat (3) is rotatably provided with a transmission rod (7) and a gear selection handle (11) in a first direction, the variable speed operation control shell (2) is rotatably provided with a gear selection rocker arm (12) on one side in a second direction, the first direction and the second direction do not interfere with each other, and one end of the transmission rod (7) and the gear selection rocker arm (12) is fixedly connected with a gear selection rocker arm (6) perpendicular thereto.

2. The tractor gearbox upper cover unit according to claim 1, characterized in that, The variable speed operation control shell (2) is rotatably provided with a gear selection rocker arm (12) on one side in a second direction, the first direction and the second direction do not interfere with each other, and one end of the transmission rod (7) and the gear selection rocker arm (12) is fixedly connected with a gear selection rocker arm (6) perpendicular thereto.

3. The tractor gearbox upper cover unit according to claim 1, characterized in that, The oil seal seat (3) is fixedly provided with an oil seal pressing plate (4) on one side, and screw holes are symmetrically formed on both sides of the oil seal pressing plate (4).

4. The tractor gearbox upper cover unit according to claim 1, characterized in that, The transmission rod (7) is slidably provided with a gear selection handle (11) at one end inside the variable speed operation control shell (2), the transmission rod (7) is fixedly provided with a gear selection reset spring (10), and the gear selection reset spring (10) is fixedly connected with a thrust washer (9) at both ends, one of the thrust washers (9) is fixedly connected with the outer wall of the transmission rod (7), and the other thrust washer (9) is fixedly connected with the side wall of the gear selection handle (11).

5. The tractor gearbox upper cover unit according to claim 1, characterized in that, The gear selection rocker arm (12) is fixedly connected with a connecting plate at the bottom, one end of the connecting plate is rotatably connected with the bottom of the gear selection handle (11), and a sliding rod is slidably arranged in the variable speed operation control shell (2) close to the gear selection handle (11).

6. The tractor gearbox upper cover unit according to claim 1, characterized in that, During gear selection operation, the gear selection handle (11) rotates synchronously with the transmission rod (7); during gear shifting operation, the gear selection handle (11) slides on the transmission rod (7).

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