Wear-resistant steering mechanism of walking tractor

Abstract

The utility model discloses a wear-resistant steering mechanism of a walking tractor, and belongs to the field of agricultural machinery. Comprising a steering shaft; the central transmission gear is coaxially arranged on the steering shaft and is used for transmitting power; the central transmission gear jaws are fixedly arranged on the two sides of the central transmission gear; the two groups of steering gears are used for being connected or disconnected with the central transmission gear; the steering gear jaw is fixedly arranged on the steering gear, is close to one side of the central transmission gear and is used for being meshed with the central transmission gear jaw to transmit power; and the steering gear annular groove is formed in the steering gear and is used for embedding the steering shifting block. The steering mechanism of the walking tractor has the beneficial effect that the steering mechanism of the walking tractor is resistant to abrasion.

Description

Technical Field

[0001] The present application relates to the field of agricultural machinery, and in particular to a wear-resistant steering mechanism of a walking tractor. Background Art

[0002] The walking tractor realizes the steering function by controlling the steering mechanism of the gearbox. The left and right steering forks of the original steering mechanism are an integrated structure. The fork head and the side of the steering gear annular groove of the steering gear are always in a line contact state during relative movement, which is easy to wear, resulting in unclear separation of the steering gear and the middle clamp transmission gear, steering failure and other faults.

[0003] Therefore, a wear-resistant walking tractor steering mechanism is needed. Utility Model Content

[0004] The content of this application is used to briefly introduce concepts that will be described in detail in the detailed description section below. The content of this application is not intended to identify key features or essential features of the technical solution for which protection is sought, nor is it intended to limit the scope of the technical solution for which protection is sought.

[0005] To address the technical problems mentioned in the background technology section above, some embodiments of the present application provide a wear-resistant walking tractor steering mechanism, comprising: a steering shaft; a central transmission gear coaxially mounted on the steering shaft for transmitting power; central transmission gear teeth fixedly disposed on both sides of the central transmission gear; two sets of steering gears for connecting or disconnecting with the central transmission gear; steering gear teeth fixedly disposed on the steering gear, adjacent to one side of the central transmission gear, for engaging with the central transmission gear teeth to transmit power; a steering gear annular groove provided on the steering gear; two left and right sets of steering fork assemblies, each for driving the two sets of steering gears to move, thereby achieving engagement and disconnection of the steering gear teeth with the central transmission gear teeth; a steering shift block rotatably disposed on the steering fork assembly and slidably engaged with the steering gear annular groove, the steering shift block having an abutment surface that abuts against and is parallel to the side walls of the steering gear annular groove; a left steering arm for driving the left steering fork assembly; and a right steering arm for driving the right steering fork assembly.

[0006] Furthermore, the left and right steering fork assemblies are respectively fixed on the left steering arm and the right steering arm. The steering fork assembly includes: a mounting column portion for fixing to the left steering arm or the right steering arm and a fork-shaped portion. The fork-shaped portion has two protruding heads and a gap between the two protruding heads. The steering shift block is rotatably connected to the protruding heads.

[0007] Furthermore, the steering shift block includes: a rotating part rotatably arranged on the protruding head and a strip part embedded in the annular groove of the steering gear, a carbide block is fixedly arranged on the strip part, and the carbide block has an abutting surface that abuts the side wall of the steering gear annular groove and is parallel to the side wall of the steering gear annular groove.

[0008] Furthermore, a mounting groove is provided on a side of the strip portion away from the central transmission gear, the cemented carbide is embedded in the mounting groove, and the abutting surface is provided on a side of the cemented carbide block away from the central transmission gear.

[0009] When the steering gear is disconnected from the central transmission gear, the bar's rotation offsets the inertia of the impact between the carbide wear surface and the side of the annular groove in the steering gear. This maintains the contact surface parallel and in continuous contact with the side of the annular groove, completely separating the steering gear from the central transmission gear and improving the bar's wear resistance. Because the steering spring pressure returns the gear to its original position and meshes with the central transmission gear during the return stroke, no carbide block is required on the side closest to the central transmission gear, saving manufacturing costs.

[0010] Furthermore, the central transmission gear tooth has a tooth groove, and the steering gear tooth is embedded in the tooth groove and meshes with the central transmission gear tooth.

[0011] Furthermore, bearing caps are provided at both ends of the steering shaft, and a support bearing is provided between the bearing cap and the steering shaft; wherein the steering shaft passes through the gap of the fork-shaped portion.

[0012] Furthermore, the steering gear is slidably arranged on the steering shaft, and the two steering gears are respectively located on both sides of the central transmission gear.

[0013] Furthermore, a shaft shoulder for mounting a support bearing is provided on the steering shaft, and a washer located on the side of the support bearing close to the steering gear is connected in series to the shaft shoulder, and the support bearing is limited by the washer and the bearing cover.

[0014] Furthermore, a right steering spring is placed between the steering gear and the washer on the right side of the central transmission gear; a left steering spring is placed between the steering gear and the washer on the left side of the central transmission gear. The right steering spring and the left steering spring are sleeved on the steering shaft, the right steering spring is arranged between the steering gear and the washer on the right side, and the left steering spring is arranged between the steering gear and the washer on the left side.

[0015] When turning left, the left steering arm is forced to rotate the left steering fork assembly, and the steering shift block shifts the steering gear axially, disconnecting it from the central drive gear. At this time, the left steering spring is compressed, and the resulting pressure can push the steering gear and the central drive gear to mesh again without external force, causing the steering fork assembly and steering arm to automatically return to their original position, completing the turn. The same principle applies when turning right.

[0016] Furthermore, a retaining ring groove is provided on the steering shaft on one side of the central transmission gear, and the other side is limited by a shaft shoulder. A retaining ring is installed on the retaining ring groove, and the retaining ring and the shaft shoulder limit the central transmission gear.

[0017] The beneficial effect of the present application is that a wear-resistant walking tractor steering mechanism is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of this application and make other features, purposes and advantages of this application more apparent. The drawings and descriptions of the exemplary embodiments of this application are used to explain this application and do not constitute an improper limitation on this application.

[0019] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the elements and components are not necessarily drawn to scale.

[0020] In the attached figure:

[0021] Figure 1 is an overall schematic diagram according to an embodiment of the present application;

[0022] Figure 2 yes Figure 1 A schematic cross-sectional view of an embodiment;

[0023] Figure 3 yes Figure 1 A schematic diagram of the installation of the steering block in the embodiment;

[0024] Figure 4 yes Figure 1 Front view of the fork in an embodiment.

[0025] Reference numerals:

[0026] 100. Central transmission gear; 101. Central transmission gear tooth; 102. Steering gear; 103. Steering gear tooth; 104. Steering fork assembly; 105. Steering gear annular groove; 106. Steering shift block; 107. Steering shaft; 108. Bearing cover; 109. Right steering arm; 110. Left steering arm; 113. Mounting column; 114. Fork-shaped portion; 115. Protruding head; 116. Notch; 117. Rotating portion; 118. Strip portion; 119. Mounting groove; 120. Support bearing; 121. Washer; 122. Right steering spring; 123. Retaining ring; 124. Left steering spring. DETAILED DESCRIPTION

[0027] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0028] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0029] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0030] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0031] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0032] Reference Figure 1-4 A wear-resistant steering mechanism for a walking tractor includes a central transmission gear 100, a central transmission gear tooth 101, a steering gear 102, a steering gear tooth 103, a steering fork assembly 104, a steering gear annular groove 105, a steering shift block 106, a rotating pull rod, a steering shaft 107, and a bearing cap 108. The central transmission gear 100 is sleeved on the steering shaft 107, and the inner diameter of the central transmission gear 100 is the same as the diameter of the steering shaft 107.

[0033] In one embodiment, the central transmission gear 100 is fixedly engaged with the steering shaft 107. The steering shaft 107 is provided with a retaining ring groove on one side of the central transmission gear 100 and a shaft shoulder on the other side of the central transmission gear 100. A retaining ring is installed on the retaining ring groove, and the retaining ring and the shaft shoulder limit the central transmission gear 100.

[0034] Central transmission gear teeth 101 are fixed at both ends of the central transmission gear 100 and rotate coaxially with the central transmission gear 100. Two steering gears 102 are provided. These two steering gears 102 are slidably mounted on a steering shaft 107 and are located on either side of the central transmission gear 100. The inner diameter of the steering gear 102 is the same as that of the steering shaft 107. A steering gear tooth 103 is fixed to the side of the steering gear 102 closest to the central transmission gear 100.

[0035] The steering gear 102 slides on the sliding steering shaft 107 so that the steering gear tooth 103 has two states; in the first state, the steering gear tooth 103 is engaged with the central transmission gear tooth 101, so that the power of the central transmission gear 100 is transmitted to the steering gear 102; in the second state, the steering gear tooth 103 is disengaged from the central transmission gear tooth 101, and the power of the central transmission gear 100 cannot be transmitted to the steering gear 102.

[0036] The steering fork assembly 104 is mounted on the steering gear 102 and includes a mounting post 113 and a fork portion 114. The mounting post 113 is fixedly connected to a rotating tie rod, and turning the rotating tie rod drives the steering fork assembly 104 to rotate. The steering arm includes a right steering arm 109 and a left steering arm 110. The mounting posts 113 of the two steering fork assemblies 104 are fixedly connected to the right steering arm 109 and the left steering arm 110, respectively.

[0037] The fork portion 114 has two protrusions 115 and a notch 116 between the two protrusions 115. The steering shift block 106 is rotatably connected to the protrusion 115. A steering gear annular groove 105 is defined on the annular side surface of the steering gear 102, and the steering shift block 106 is inserted into the steering gear annular groove 105. The steering fork assembly 104 rotates to drive the steering gear 102 to slide on the steering shaft 107, thereby controlling the steering gear tooth 103 between the first and second positions.

[0038] In one embodiment, the steering shaft 107 passes through the notch 116 so that the two protruding heads 115 are respectively located on both sides of the axis of the steering gear 102 .

[0039] In one embodiment, the steering shift block 106 includes a rotating portion 117 rotatably mounted on a raised head 115 and a bar portion 118 embedded in the steering gear annular groove 105. A carbide block is fixedly mounted on the bar portion 118. The carbide block has an abutting surface that abuts and is parallel to the sidewall of the steering gear annular groove 105. This surface contact with the sidewall of the steering gear annular groove 105 ensures precise fit, even force distribution, and minimizes wear.

[0040] In one embodiment, a portion of the strip portion 118 is embedded in the steering gear annular groove 105. At the same time, both ends have portions extending out of the steering gear annular groove 105 to prevent the strip portion 118 from sliding out.

[0041] In one embodiment, a mounting groove 119 is defined on a side of the bar portion 118 away from the central transmission gear 100 , the cemented carbide is embedded in the mounting groove 119 , and the abutting surface is located on the side of the cemented carbide block away from the central transmission gear 100 .

[0042] In one embodiment, the central transmission gear tooth embedment 101 has a tooth groove, and the steering gear tooth embedment 103 is embedded in the tooth groove and meshes with the central transmission gear tooth embedment 101. The projected area of ​​the steering gear tooth embedment 103 on the plane perpendicular to the axis of the central transmission gear 100 is smaller than the projected area of ​​the tooth groove on the central transmission gear tooth embedment 101.

[0043] The bearing caps 108 are provided at both ends of the steering shaft 107 . The bearing caps 108 are provided with support bearings 120 sleeved on the steering shaft 107 . The steering shaft 107 is provided with shaft shoulders for mounting the support bearings 120 .

[0044] In one embodiment, a washer 121 is serially connected to the shoulder of the shaft, located on the side of the support bearing 120 near the steering gear 102. The washer 121 and the bearing cap 108 constrain the support bearing 120. A right steering spring 122 is disposed between the right steering gear 102 and the washer 121. The right steering spring 122 is sleeved on the steering shaft 107 and positioned between the steering gear 102 and the washer 121. A left steering spring 124 is disposed between the left steering gear 102 and the washer 121. When the steering gear tooth 103 on the right steering gear 102 is in the second state, the right steering spring 122 is compressed. When the steering gear tooth 103 on the left steering gear 102 is in the second state, the left steering spring 124 is compressed. Working process: When steering is required, the right steering arm 109 is rotated, causing the right steering fork assembly 104 to rotate, driving the right steering gear 102 to rotate. This causes the right steering gear tooth 103 to enter the second state, unable to transmit power. The power from the central transmission gear 100 continues to be transmitted to the left steering gear tooth 103, causing steering. The same process occurs when turning left.

[0045] The above description is only an illustration of some preferred embodiments of the present disclosure and the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A wear-resistant walking tractor steering mechanism, characterized by: include: Steering shaft; The central transmission gear is coaxially mounted on the steering shaft and is used to transmit power; The central transmission gear teeth are fixedly arranged on both sides of the central transmission gear; Steering gears, provided in two sets, used to connect or disconnect with the central transmission gear; The steering gear teeth are fixed on the steering gear, close to the central transmission gear side, and are used to The central transmission gears mesh with each other to transmit power; The steering gear annular groove is provided on the steering gear and is used to insert the steering shift block; The steering fork assembly has two groups, left and right, which are used to drive the two groups of steering gears to realize the steering. The meshing and disconnection of the toothed gear and the central transmission gear; The steering shift block is rotatably mounted on the steering fork assembly and slides in the annular groove of the steering gear. The steering shift block has an abutting surface which abuts against the side wall of the steering gear annular groove and is parallel to the side wall of the steering gear annular groove; Left steering arm, used to drive the left steering fork assembly; Right steering arm, used to drive the right steering fork assembly.

2. The wear-resistant walking tractor steering mechanism according to claim 1, characterized in that: The left and right steering fork assemblies are respectively fixed on the left steering arm and the right steering arm. On the arm, the steering fork assembly includes: A mounting column portion and a fork portion for fixing to the left steering arm or the right steering arm, wherein the fork portion has There are two raised heads and a gap between the two raised heads, and a steering block is rotatably connected to the raised heads.

3. The wear-resistant walking tractor steering mechanism according to claim 2, characterized in that: The steering block includes a rotating portion rotatably arranged on the protruding head and a rotating portion embedded in the steering The strip portion in the annular groove of the gear is fixed with a hard alloy block, which has abutment The side wall of the steering gear annular groove and the abutting surface parallel to the side wall of the steering gear annular groove.

4. The wear-resistant walking tractor steering mechanism according to claim 3, characterized in that: The strip portion is provided with a mounting groove on a side away from the central transmission gear. It is embedded in the installation groove, and the abutting surface is arranged on the side of the carbide block away from the central transmission gear.

5. The wear-resistant walking tractor steering mechanism according to claim 1, characterized in that: The central transmission gear tooth has a tooth groove, and the steering gear tooth is embedded in the tooth groove and aligned with the central transmission gear tooth. The transmission gears are meshed.

6. The wear-resistant walking tractor steering mechanism according to claim 2, characterized in that: Bearing caps are provided at both ends of the steering shaft, and a support bearing is provided between the bearing cap and the steering shaft; The steering shaft passes through the notch of the fork portion.

7. The wear-resistant walking tractor steering mechanism according to claim 6, characterized in that: The steering gear is slidably arranged on the steering shaft, and the two steering gears are respectively located in the middle Both sides of the central transmission gear.

8. The wear-resistant walking tractor steering mechanism according to claim 6, characterized in that: The steering shaft is provided with a shoulder for mounting the support bearing, and the shoulder is connected in series with a shaft located on the support shaft. The washer on the side close to the steering gear is used to limit the support bearing through the washer and the bearing cover. Bit.

9. The wear-resistant walking tractor steering mechanism according to claim 8, characterized in that: a right steering spring placed between the steering gear and the washer on the right side of the central transmission gear, The left steering spring is placed between the steering gear and the washer on the left side of the central transmission gear, and the right steering spring The left steering spring and the left steering spring are sleeved on the steering shaft, and the right steering spring is arranged on the right side of the steering gear. A left steering spring is arranged between the steering gear on the left side and the washer.

10. The wear-resistant walking tractor steering mechanism according to claim 6, characterized in that: The steering shaft is provided with a retaining ring groove on one side of the central transmission gear and a shaft shoulder on the other side. Limiting: A retaining ring is installed on the retaining ring groove, and the retaining ring and the shaft shoulder limit the central transmission gear.

Images