Stepless-angle-adjustable universal steering wheel structure for crawler

Abstract

The utility model discloses a steplessly adjustable angle universal steering wheel structure of a crawler, which comprises an inner tubular column, an outer tubular column and a mounting bracket, the outer tubular column is nested in a sleeve, a clamping plate with a U-shaped plate structure is arranged on the mounting bracket, and an inner cam is fixedly arranged on one side wall of the clamping plate; a clamping plate groove of a U-shaped plate-shaped structure is formed in the outer wall of the sleeve, and the clamping plate groove is embedded in the clamping plate. A rotating shaft and an adjusting bolt are connected between the two side walls of the clamping plate groove, the clamping plate is rotationally connected with the rotating shaft, and the adjusting bolt penetrates through the clamping plate. A locking nut II, a spring gland, a pressure spring and a plane thrust bearing II are arranged at the tail end of the adjusting bolt; a locking handle is nested on the adjusting bolt, the locking handle is provided with an abutting part attached to the cam surface of the inner cam, a length adjusting spring pin is arranged on the outer tubular column, and a plurality of first locking holes are formed in the outer wall of the inner tubular column; the angle adjusting device has the advantages of simple and compact angle adjusting structure, small occupied installation space, stable and reliable adjusting operation, good driving comfort and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle technology, in particular to a universal steering wheel structure for a crawler vehicle capable of steplessly adjusting the angle. Background Art

[0002] The steering wheel is an important part of the vehicle control system and plays a vital role in the vehicle's controllability and maneuverability. The length and angle adjustment of the steering wheel is a basic function that enables the driver to adjust the position of the steering wheel according to the body shape and operation needs, improve driving comfort, reduce the difficulty of operation, and reduce the pressure of operation, which is of great significance to the safety and stability of the vehicle; the steering mechanism of traditional tracked vehicles mostly only has the telescopic function in the length direction. Patent publication number CN105292228A discloses an electric steering wheel for tracked armored vehicles, which specifically discloses the length adjustment and angle adjustment mechanism of the steering wheel, but the angle adjustment machine has a large size, occupies a large installation space, and the steering wheel angle adjustment operation is difficult, and the driving comfort is poor. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a universal steering wheel structure for tracked vehicles with stepless angle adjustment. The steering wheel angle adjustment structure is simple and compact, occupies a small installation space, the adjustment operation is smooth and reliable, the steering wheel length adjustment and angle adjustment operation are convenient, the driving comfort is good, and it has a neutral locking function, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a universal steering wheel structure for a tracked vehicle with stepless adjustment of the angle, comprising a steering wheel body, an inner tube column, an outer tube column, a sleeve and a mounting bracket, the inner tube column being nested in the outer tube column, the outer tube column being nested in the sleeve, the steering wheel body being fixedly connected to one end of the inner tube column, the mounting bracket being fixedly connected to a clamping plate with a U-shaped plate-like structure, an inner cam being fixedly provided on one side wall of the clamping plate, a cam surface being provided on the outer end of the inner cam, a yielding through hole being opened in the center of the inner cam along its axial direction; a clamping plate groove being provided on the outer wall of the sleeve, the clamping plate groove being a U-shaped plate-like structure, the clamping plate and the opening of the clamping plate groove being opposite to each other, and the clamping plate groove being nested in the clamping plate; step holes and adjustment holes being relatively opened on the two side walls of the clamping plate groove, a rotating shaft being connected between the step holes, and the clamping plate being rotatably connected to the rotating shaft, the yielding through hole and the adjusting hole The positions of the node holes correspond to each other, and the adjustment holes are of an oblong hole structure. Adjustment bolts are arranged between the adjustment holes, and the adjustment bolts pass through the inner cam, the clamping plate groove and the clamping plate; the end of the adjusting bolt is provided with a locking nut 2, a spring pressure cover, a compression spring and a planar thrust bearing 2 in sequence from the outside to the inside, and the planar thrust bearing 2 fits tightly with the clamping plate; a locking handle is nested between the head of the adjusting bolt and the inner cam, and the locking handle is provided with a rotating pressure plate, and the rotating pressure plate is provided with an abutment portion that fits with the cam surface of the inner cam, and the abutment portion of the rotating pressure plate rotates around the adjusting bolt relative to the cam surface of the inner cam to tighten or loosen the clamping plate; a length adjustment spring pin arranged along its radial direction is fixedly connected to the outer pipe column, and a plurality of locking holes 1 are opened on the outer wall of the inner pipe column at the position corresponding to the length adjustment spring pin, and the locking holes 1 are arranged along the axial direction of the inner pipe column.

[0005] Furthermore, the cam surface of the inner cam includes at least two first planes and at least two second planes, the first planes and the second planes are staggered and connected by a slope surface, the first plane is higher than the second plane, and a limiting protrusion is provided at one end of the first plane away from the second plane; the rotating pressing plate is provided with limiting grooves of arc structure at the positions corresponding to the limiting protrusions, and the connecting parts on the rotating pressing plate located between the limiting grooves in the circumferential direction are abutment parts; the limiting protrusions on the inner cam are nested in the limiting grooves corresponding to them.

[0006] Furthermore, a plurality of positioning shafts are provided at the inner end of the inner cam, and connection holes are provided at positions on the clamping plate corresponding to the positioning shafts, and the inner cam is fixedly nested in the connection holes of the clamping plate through the positioning shafts.

[0007] Furthermore, the rotating shaft is a connecting bolt, and the rotating shaft passes through the clamping plate groove and the clamping plate, a planar thrust bearing is embedded in the step hole, and the rotating shaft is rotatably connected to the planar thrust bearing; a locking nut is threadedly connected to the end of the rotating shaft; a bushing is also embedded in the part of the rotating shaft that is rotatably connected to the clamping plate.

[0008] Furthermore, the sleeve is fixedly connected to a center locking spring pin arranged along its radial direction, and a second locking hole is opened on the outer wall of the outer column at a position corresponding to the center locking spring pin.

[0009] Furthermore, a tension spring is provided between the clamping plate groove and one end of the clamping plate.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the universal steering wheel structure for tracked vehicles that can adjust the angle steplessly, the clamping plate groove on the sleeve is rotatably connected to the clamping plate on the mounting bracket through the rotating shaft, the friction between the clamping plate groove and the clamping plate is adjusted by rotating the locking handle to control the angle adjustment of the steering wheel, and the sleeve drives the steering wheel body to rotate with the rotating shaft as the center, and the plane thrust bearing 1 and the bushing connected to the rotating shaft can eliminate the abnormal noise generated between the clamping plate and the clamping plate groove, the steering wheel angle adjustment structure is simple and compact, occupies a small installation space, and the adjustment operation is smooth and reliable; the locking hole 1 on the inner column is locked by the length adjustment spring pin provided on the outer column, the steering wheel length adjustment and angle adjustment operation are convenient, and the driving comfort is good; the steering wheel is in a neutral locked state by the neutral locking spring pin being nested in the locking hole 2, the steering wheel is locked in the neutral position and cannot be turned, thereby preventing misoperation and having a neutral locking function. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is an explosion diagram of the utility model;

[0013] Figure 3 This is a schematic diagram of the mounting bracket structure of the utility model;

[0014] Figure 4 This is a schematic diagram of the internal cam structure of the utility model;

[0015] Figure 5 This is a schematic diagram of the back structure of the inner cam of the utility model;

[0016] Figure 6 This is a schematic diagram of the sleeve structure of the utility model;

[0017] Figure 7 This is a schematic diagram of the locking handle structure of the utility model;

[0018] Figure 8 This is an exploded schematic diagram of the rotating connection between the mounting bracket and the sleeve of the utility model;

[0019] Fig. 9 It is a partial enlarged view of the internal structure of the casing of the utility model.

[0020] In the figure: 1. steering wheel body; 2. inner column; 201. locking hole one; 3. outer column; 4. sleeve; 41. clamping plate groove; 411. step hole; 412. adjustment hole; 5. mounting bracket; 6. clamping plate; 7. inner cam; 71. first plane; 72. second plane; 73. limiting protrusion; 74. positioning shaft; 75. clearance hole; 8. rotating shaft; 9. plane thrust bearing one; 10. locking nut one; 11. locking handle; 111. rotating pressure plate; 112. limiting groove; 113. abutment; 12. adjusting bolt; 13. plane thrust bearing two; 14. compression spring; 15. locking nut two; 16. length adjustment spring pin; 17. center locking spring pin; 18. tension spring; 19. spring pressure cover; 20. bushing. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0022] See also Figure 1-9The utility model provides a technical solution: a universal steering wheel structure for a crawler vehicle with stepless angle adjustment, comprising a steering wheel body 1, an inner column 2, an outer column 3, a sleeve 4 and a mounting bracket 5, the inner column 2 is nested in the outer column 3, the outer column 3 is nested in the sleeve 4, the steering wheel body 1 is fixedly connected to one end of the inner column 2, a clamping plate 6 with a U-shaped plate-like structure is fixedly connected to the mounting bracket 5; an inner cam 7 is fixedly provided on one side wall of the clamping plate 6, a cam surface is provided on the outer end of the inner cam 7, a clearance through hole 75 is opened in the center of the inner cam 7 along its axial direction, a plurality of positioning shafts 74 are provided on the inner end of the inner cam 7, connecting holes are opened at positions corresponding to the positioning shafts 74 on the clamping plate 6, and the inner cam 7 is fixedly nested in the connecting hole of the clamping plate 6 through the positioning shafts 74; a clamping plate groove 41 is provided on the outer wall of the sleeve 4, the clamping plate groove 41 is a U-shaped plate-like structure, the clamping plate 6 is opposite to the opening of the clamping plate groove 41, and the clamping plate groove 41 Nested in the clamping plate 6; step holes 411 and adjustment holes 412 are relatively opened on the two side walls of the clamping plate groove 41, and a rotating shaft 8 is connected between the step holes 411. The rotating shaft 8 is a connecting bolt, and the rotating shaft 8 passes through the clamping plate groove 41 and the clamping plate 6. A plane thrust bearing 9 is nested in each of the step holes 411, and the rotating shaft 8 is rotatably connected to the plane thrust bearing 9; a locking nut 10 is threadedly connected to the end of the rotating shaft 8; the rotating shaft 8 is rotatably connected to the clamping plate 6 The position of the adjusting hole 412 is also embedded with a bushing 20; the position of the through hole 75 corresponds to the position of the adjusting hole 412, the adjusting hole 412 is an oblong hole structure, an adjusting bolt 12 is arranged between the adjusting holes 412, and the adjusting bolt 12 passes through the inner cam 7, the clamping plate groove 41 and the clamping plate 6; the end of the adjusting bolt 12 is provided with a locking nut 15, a spring pressure cover 19, a compression spring 14 and a plane thrust bearing 13 in sequence from the outside to the inside, and the plane thrust bearing 13 is tightly fitted with the clamping plate 6;

[0023] A locking handle 11 is nested between the head of the adjusting bolt 12 and the inner cam 7, and the locking handle 11 is provided with a rotating pressing plate 111, and the rotating pressing plate 111 is provided with an abutment portion 113 that fits the cam surface of the inner cam 7, and the cam surface of the inner cam 7 includes at least two first planes 71 and at least two second planes 72, the first planes 71 and the second planes 72 are staggered and connected by a slope surface, the first plane 71 is higher than the second plane 72, and the first plane 71 is away from the second plane 7 2 is provided with a limiting protrusion 73; the rotating pressing piece 111 is provided with an arc-shaped limiting groove 112 at the position corresponding to the limiting protrusion 73, and the connecting part between the limiting grooves 112 on the rotating pressing piece 111 in the circumferential direction is the abutment part 113; the limiting protrusions 73 on the inner cam 7 are all nested in the corresponding limiting grooves 112; the abutment part 113 of the rotating pressing piece 111 rotates around the adjusting bolt 12 relative to the cam surface of the inner cam 7 to tighten or loosen the clamping plate 6;

[0024] The outer tube column 3 is fixedly connected to a length adjustment spring pin 16 arranged along its radial direction, and a plurality of locking holes 201 are opened on the outer wall of the inner tube column 2 at positions corresponding to the length adjustment spring pin 16, and the locking holes 201 are arranged along the axial direction of the inner tube column 2; the sleeve 4 is fixedly connected to a mid-position locking spring pin 17 arranged along its radial direction, and a locking hole 2 is opened on the outer wall of the outer tube column 3 at positions corresponding to the mid-position locking spring pin 17.

[0025] Working principle:

[0026] The mounting bracket 5 is fixedly connected to the external vehicle frame; when the steering wheel angle needs to be adjusted, the locking handle 11 is rotated to make the rotating pressure plate 111 rotate around the adjusting bolt 12 relative to the cam surface of the inner cam 7, so that the abutment portion 113 on the rotating pressure plate 111 rotates from the first plane 71 on the inner cam 7 to its second plane 72, and the relative distance between the rotating pressure plate 111 and the inner cam 7 is reduced. At this time, the two side plates of the clamping plate 6 are elastically expanded, and the spacing between the two side plates of the clamping plate 6 is greater than the spacing between the two side plates of the clamping plate groove 41. The two side plates of the clamping plate 6 and the two side plates of the clamping plate groove 41 are in a loose state, and the clamping plate groove 41 and the sleeve 4 can be rotated around the rotating shaft 8 to adjust the steering wheel. The angle of the steering wheel body 1; after the angle adjustment of the steering wheel body 1 is completed, the locking handle 11 is rotated in the reverse direction to make the rotating pressing plate 111 rotate around the adjusting bolt 12 relative to the cam surface of the inner cam 7, and the abutting portion 113 on the rotating pressing plate 111 rotates from the second plane 72 on the inner cam 7 to its first plane 71, the relative distance between the rotating pressing plate 111 and the inner cam 7 increases, the clamping plate 6 is squeezed by the inner cam 7 so that the two side plates of the clamping plate 6 elastically shrink, the two side plates of the clamping plate 6 and the two side plates of the clamping plate groove 41 are tightly fitted and generate a very large friction force, at this time, the clamping plate 6 and the clamping plate groove 41 are in a locked state, so that the steering wheel body 1 cannot be adjusted in angle;

[0027] When the length of the steering wheel needs to be adjusted, the length adjustment spring pin 16 is pulled outward to disengage the length adjustment spring pin 16 from the locking hole 201, and the length of the steering wheel body 1 can be adjusted by pushing and pulling the steering wheel body 1 along the axial direction of the inner column 2; after the length of the steering wheel body 1 is adjusted, the length adjustment spring pin 16 is released to be inserted into the corresponding locking hole 201;

[0028] The steering wheel is in a neutral locked state by nesting the neutral locking spring pin 17 in the locking hole 2. The steering wheel is locked in the neutral position and steering operation cannot be performed to prevent misoperation. When the locked state needs to be released, the neutral locking spring pin 17 only needs to be pulled outward to release the locked state.

[0029] Furthermore, a tension spring 18 is provided between the clamping plate groove 41 and one end of the clamping plate 6; the compression spring 14 and the tension spring 18 can improve the operational feel when adjusting the steering wheel angle.

[0030] The embodiment discloses a universal steering wheel structure for tracked vehicles with stepless angle adjustment. The clamping plate groove 41 on the sleeve 4 is rotatably connected to the clamping plate 6 on the mounting bracket 5 through the rotating shaft 8. The friction between the clamping plate groove 41 and the clamping plate 6 is adjusted by rotating the locking handle 11 to control the angle adjustment of the steering wheel. The sleeve 4 drives the steering wheel body 1 to rotate with the rotating shaft 8 as the center. The plane thrust bearing 19 and the bushing 20 connected to the rotating shaft 8 can eliminate the abnormal noise generated between the clamping plate 6 and the clamping plate groove 41. The steering wheel angle adjustment structure is simple and compact, and the adjustment operation is smooth and reliable. The locking hole 201 on the inner column 2 is locked by the length adjustment spring pin 16 provided on the outer column 3, so that the length of the steering wheel is easy to adjust. The steering wheel is in a neutral locked state by the neutral locking spring pin 17 nested in the locking hole 2. The steering wheel is locked in the neutral position and cannot be turned, so as to prevent misoperation.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A universal steering wheel structure for tracked vehicles capable of steplessly adjusting the angle, comprising a steering wheel body, an inner column, an outer column, a sleeve and a mounting bracket, wherein the inner column is nested in the outer column, the outer column is nested in the sleeve, and the steering wheel body is fixedly connected to one end of the inner column, characterized in that: A clamping plate with a U-shaped plate-like structure is fixedly connected to the mounting bracket, an inner cam is fixedly provided on one side wall of the clamping plate, a cam surface is provided on the outer end of the inner cam, and a clearance through hole is opened in the center of the inner cam along its axial direction; a clamping plate groove is provided on the outer wall of the sleeve, and the clamping plate groove is a U-shaped plate-like structure, the clamping plate is opposite to the opening of the clamping plate groove, and the clamping plate groove is nested in the clamping plate; step holes and adjustment holes are relatively opened on the two side walls of the clamping plate groove, a rotating shaft is connected between the step holes, and the clamping plate is rotatably connected to the rotating shaft, the clearance through hole corresponds to the position of the adjustment hole, the adjustment hole is an oblong hole structure, an adjusting bolt is provided between the adjusting holes, and the adjusting bolt passes through the inner cam, the clamping plate groove and the clamping plate; the adjusting The end of the bolt is provided with a locking nut 2, a spring pressure cover, a compression spring and a planar thrust bearing 2 in sequence from the outside to the inside, and the planar thrust bearing 2 is tightly fitted with the clamp; a locking handle is nested between the head of the adjusting bolt and the inner cam, and the locking handle is provided with a rotating pressure plate, and the rotating pressure plate is provided with an abutment portion that fits with the cam surface of the inner cam, and the abutment portion of the rotating pressure plate rotates around the adjusting bolt relative to the cam surface of the inner cam to tighten or loosen the clamp; a length adjustment spring pin arranged along its radial direction is fixedly connected to the outer tube column, and a plurality of locking holes 1 are opened on the outer wall of the inner tube column at positions corresponding to the length adjustment spring pins, and the locking holes 1 are arranged along the axial direction of the inner tube column.

2. The universal steering wheel structure for tracked vehicles capable of steplessly adjusting the angle according to claim 1, characterized in that: The cam surface of the inner cam includes at least two first planes and at least two second planes, the first planes and the second planes are staggered and connected by a slope surface, the first plane is higher than the second plane, and a limiting protrusion is provided at one end of the first plane away from the second plane; the rotating pressing plate is provided with limiting grooves of arc structure at the positions corresponding to the limiting protrusions, and the connecting parts on the rotating pressing plate located between the limiting grooves in the circumferential direction are abutment parts; the limiting protrusions on the inner cam are nested in the corresponding limiting grooves.

3. The universal steering wheel structure of a crawler vehicle capable of steplessly adjusting the angle according to claim 1, characterized in that: The inner side end of the inner cam is provided with a plurality of positioning shafts, and the clamping plate is provided with connection holes at positions corresponding to the positioning shafts, and the inner cam is fixedly nested in the connection holes of the clamping plate through the positioning shafts.

4. The universal steering wheel structure of a crawler vehicle capable of steplessly adjusting the angle according to claim 1, characterized in that: The rotating shaft is a connecting bolt, and the rotating shaft passes through the clamping plate groove and the clamping plate. A planar thrust bearing is embedded in the step hole, and the rotating shaft is rotatably connected to the planar thrust bearing; a locking nut is threadedly connected to the end of the rotating shaft; a bushing is also embedded in the part of the rotating shaft that is rotatably connected to the clamping plate.

5. The universal steering wheel structure for tracked vehicles capable of steplessly adjusting the angle according to claim 1, characterized in that: The sleeve is fixedly connected with a center locking spring pin arranged along its radial direction, and a second locking hole is opened on the outer wall of the outer column at a position corresponding to the center locking spring pin.

6. The universal steering wheel structure of a crawler vehicle capable of steplessly adjusting the angle according to claim 1, characterized in that: A tension spring is arranged between the clamping plate groove and one end of the clamping plate.

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