Chassis side shift control mechanism

Abstract

The utility model discloses a chassis side gear shifting control mechanism which comprises a gear shifting support, the gear shifting support is fixedly connected to the side portion of a rear axle housing, and a gear shifting shaft arranged in the gear shifting support in the transverse direction is arranged in the gear shifting support in a penetrating mode. The inner end of the gear shifting shaft extends into an inner cavity of the rear axle housing, a gear shifting block is installed at the inner end of the gear shifting shaft, a main body of the gear shifting shaft is sleeved with an operation rocker arm in sliding connection with the main body of the gear shifting shaft, and the lower portion of the main body of the operation rocker arm is rotationally installed in a gear shifting support. The outer end of the gear shifting shaft and the top end of the control rocker arm are hinged to the bottom of the gear shifting handle assembly. The chassis side shift control mechanism provided by the utility model can be laterally arranged, so that a driver can conveniently and quickly carry out shift operation, and the operability and the use efficiency of a tractor are improved; the structure is more compact, and the overall layout is more reasonable.

Description

Technical Field

[0001] The utility model relates to a chassis side shifting operating mechanism, belonging to the technical field of shifting mechanisms. Background Art

[0002] Wheeled tractor is a type of tractor, that is, a tractor with wheels as the traveling device. There are many types, such as two-wheel (walk-behind tractor) and four-wheel. In order to meet the needs of wheeled tractors for supporting loaders and other engineering operations, the tractor is required to have the function of fast forward and fast reverse main speed change. The shuttle-type main speed change configuration is an important component for realizing the fast forward and fast reverse shifting of wheeled tractors. The shuttle-type main speed change configuration of the tractor facilitates the user to quickly switch the tractor's forward / reverse 12 / 34 gears, improves labor efficiency, and is increasingly favored by users.

[0003] The shuttle-type gear main speed shift control is a special gear shift mechanism, and its core components include the gear shift handle assembly, the gear shift shaft, the gear shift support, etc. Generally, the operating position of the shuttle-type gear main speed shift control shifter is set just above the tractor chassis, which affects the user's operating space and also causes gear shifting difficulties. In addition, there are many accessories, which affects the smoothness of the tractor's gear shifting.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] The utility model aims at the deficiencies in the background technology and provides a chassis side shift control mechanism, which can be placed sideways so that the driver can perform shift operations conveniently and quickly, thereby improving the operability and use efficiency of the tractor; the structure is more compact and the overall layout is more reasonable.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The chassis side shift operating mechanism comprises a shift support, the shift support is fixedly connected to the side of the rear axle housing, and a shift shaft arranged in a transverse direction is passed through the inside of the shift support;

[0008] The inner end of the shift shaft extends into the inner cavity of the rear axle housing, a shift head is installed on the inner end of the shift shaft, a control rocker arm slidably connected to the shift shaft is sleeved on the main body of the shift shaft, and the lower part of the main body of the control rocker arm is rotatably installed in the shift support;

[0009] The outer end of the shift shaft and the top end of the operating rocker arm are both hingedly connected to the bottom of the shift handle assembly.

[0010] Furthermore, a waist-shaped hole is provided at the top of the operating rocker arm, and the operating rocker arm is hingedly connected to the bottom of the shift handle assembly through the waist-shaped hole.

[0011] Furthermore, the main body of the shift shaft is provided with a sliding shoulder integrally formed therewith, and the outer circumference of the sliding shoulder is provided with shift ring grooves arranged side by side, and the cross-section shape of the shift ring groove is an arc shape.

[0012] Furthermore, a mounting hole connected to the inner cavity of the shift support is provided at the bottom, and a self-locking steel ball, a self-locking spring and a locking bolt are installed in the mounting hole from top to bottom in sequence. The self-locking steel ball is clamped in the shift ring groove of the shift shaft under the action of the self-locking spring.

[0013] Furthermore, a positioning ring groove is provided on the outer circumference below the operating rocker arm body, and the positioning ring groove is arranged close to the sliding shoulder of the shift shaft, and the cross-section of the positioning ring groove is a rectangular structure.

[0014] Furthermore, a positioning hole adapted to the position of the positioning ring groove is formed on the shift support, a locking pin is installed in the positioning hole, and an inner end of the locking pin extends into the positioning ring groove.

[0015] Furthermore, the shifting head is installed in the shifting slots of the two shifting blocks, and the two shifting blocks are respectively sleeved and fixed on the main bodies of the two shift fork shafts, and the shift forks are installed on the shift fork shafts.

[0016] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0017] The shift support is fixed to the side of the rear axle housing. When the driver needs to shift gears, the shift lever assembly can be operated to drive the shift lever to swing left and right, or to swing forward and backward. The left and right and forward and backward movement of the shift lever can cause the shift fork shaft and the shift fork to move accordingly. Finally, the shift fork will push the shift engagement sleeve to engage with different gears, thereby realizing different gear shifting.

[0018] The gear shift mechanism adopts a side-mounted design, which allows the driver to perform gear shifting operations conveniently and quickly, improving the operability and efficiency of the tractor. At the same time, due to its relatively compact structure, it also saves space on the tractor and makes the overall layout more reasonable.

[0019] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a structural sectional view of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the utility model with the rear axle housing removed.

[0023] In the figure, 1-shift support, 101-positioning hole, 2-rear axle housing, 3-shift shaft, 301-shift ring groove, 4-operating rocker arm, 401-waist hole, 402-positioning ring groove, 5-shift handle assembly, 6-self-locking steel ball, 7-self-locking spring, 8-locking bolt, 9-shift dial head, 10-shift dial block, 11-shift fork shaft. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0025] like Figure 1-Figure 3 As shown together, the utility model provides a tractor side shifting mechanism, including a shift support 1, the shift support 1 is fixedly connected to the side of the rear axle housing 2, and a shift shaft 3 arranged in the transverse direction is penetrated inside the shift support 1.

[0026] The inner end of the shift shaft 3 extends into the inner cavity of the rear axle housing 2. A shift dial head 9 is installed on the inner end of the shift shaft 3. An operating rocker arm 4 slidably connected to the shift shaft 3 is sleeved on the main body of the shift shaft 3. The main body of the operating rocker arm 4 is rotatably installed in the shift support 1.

[0027] The outer end of the shift shaft 3 and the top end of the operating rocker arm 4 are both hingedly connected to the bottom of the shift handle assembly 5 .

[0028] A waist-shaped hole 401 is provided at the top of the operating rocker arm 4 , and the operating rocker arm 4 is hingedly connected to the bottom of the shift handle assembly 5 through the waist-shaped hole 401 .

[0029] The main body of the shift shaft 3 is provided with a sliding shoulder integrally formed therewith, and the outer circumference of the sliding shoulder is provided with shift ring grooves 301 arranged side by side, and the cross-section shape of the shift ring grooves 301 is an arc shape.

[0030] The bottom of the shift support 1 is provided with a mounting hole connected to its inner cavity, and a self-locking steel ball 6, a self-locking spring 7 and a locking bolt 8 are installed in the mounting hole from top to bottom, and the locking bolt 8 is threadedly connected to the shift support 1. The self-locking steel ball 6 is clamped in the shift ring groove 301 of the shift shaft 3 under the action of the self-locking spring 7, and the shift shaft 3 is positioned at two positions along the axial direction.

[0031] A positioning ring groove 402 is provided on the outer circumference below the main body of the operating rocker arm 4 . The positioning ring groove 402 is arranged close to the sliding shoulder of the shift shaft 3 . The cross section of the positioning ring groove 402 is a rectangular structure.

[0032] The shift support 1 is provided with a positioning hole 101 adapted to the position of the positioning ring groove 402 , a locking pin is installed in the positioning hole 101 , the inner end of the locking pin extends into the positioning ring groove 402 , and the axial position of the operating rocker arm 4 is limited by the locking pin.

[0033] The shift head 9 is installed in the shifting grooves of two shifting blocks 10, and the two shifting blocks 10 are respectively mounted and fixed on the main bodies of two shift fork shafts 11, and shift forks are installed on the shift fork shafts 11. The shift head 9 can move left and right, and can also swing forward and backward, so that the shift fork shafts 11 and the shift forks move accordingly.

[0034] The specific working principle of this utility model:

[0035] When the driver needs to shift gears, the shift handle assembly 5 can be swung left and right or forward and backward by operating the shift handle assembly 5. When the shift handle assembly 5 swings left and right, the shift lever 9 is driven to move left and right through the shift shaft 3. When the shift handle assembly 5 swings forward and backward, the operating rocker arm 4 and the shift shaft 3 are driven to swing forward and backward, thereby driving the shift lever 9 to swing forward and backward. The left and right forward and backward movement of the shift lever 9 can cause the shift fork shaft 11 and the shift fork to move accordingly. Finally, the shift fork will push the shift engagement sleeve to engage with different gears, thereby realizing different gear shifting.

[0036] The design of the side shift operating mechanism of the utility model enables the driver to perform the shift operation conveniently and quickly, thereby improving the operability and use efficiency of the tractor. At the same time, due to its relatively compact structure, it also saves space on the tractor, making the overall layout more reasonable.

[0037] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. Chassis side shift control mechanism, characterized by: It comprises a shift support (1), the shift support (1) is fixedly connected to the side of the rear axle housing (2), and a shift shaft (3) arranged in a transverse direction is passed through the interior of the shift support (1); The inner end of the shift shaft (3) extends into the inner cavity of the rear axle housing (2), a shift dial head (9) is mounted on the inner end of the shift shaft (3), a control rocker arm (4) slidably connected to the shift shaft (3) is sleeved on the main body of the shift shaft (3), and the lower part of the main body of the control rocker arm (4) is rotatably mounted in the shift support (1); The outer end of the shift shaft (3) and the top end of the operating rocker arm (4) are both hingedly connected to the bottom of the shift handle assembly (5).

2. The chassis side shift control mechanism according to claim 1, characterized in that: A waist-shaped hole (401) is provided at the top end of the operating rocker arm (4), and the operating rocker arm (4) is hingedly connected to the bottom of the shift handle assembly (5) via the waist-shaped hole (401).

3. The chassis side shift control mechanism according to claim 1, characterized in that: The main body of the shift shaft (3) is provided with a sliding shoulder integrally formed therewith, and the outer circumference of the sliding shoulder is provided with shift ring grooves (301) arranged in parallel, and the cross-sectional shape of the shift ring grooves (301) is an arc shape.

4. The chassis side shift control mechanism according to claim 3, characterized in that: The bottom of the shift support (1) is provided with a mounting hole communicating with its inner cavity, and a self-locking steel ball (6), a self-locking spring (7) and a locking bolt (8) are installed in the mounting hole in order from top to bottom, and the self-locking steel ball (6) is clamped in the shift ring groove (301) of the shift shaft (3) under the action of the self-locking spring (7).

5. The chassis side shift control mechanism according to claim 1, characterized in that: A positioning ring groove (402) is provided on the outer circumference below the main body of the operating rocker arm (4), the positioning ring groove (402) is arranged close to the sliding shoulder of the shift shaft (3), and the cross section of the positioning ring groove (402) is a rectangular structure.

6. The chassis side shift control mechanism according to claim 5, characterized in that: The shift support (1) is provided with a positioning hole (101) adapted to the position of the positioning ring groove (402), a locking pin is installed in the positioning hole (101), and the inner end of the locking pin extends into the positioning ring groove (402).

7. The chassis side shift control mechanism according to claim 1, characterized in that: The shifting head (9) is mounted in shifting grooves of two shifting blocks (10), and the two shifting blocks (10) are respectively sleeved and fixed on the main bodies of two shift fork shafts (11), and the shift forks are mounted on the shift fork shafts (11).

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