A steering wheel braking mechanism and a three-point construction vehicle having the mechanism

Abstract

The present invention discloses a steering wheel braking mechanism and a three-point engineering vehicle. The steering wheel braking mechanism includes: a brake for braking the wheel hub, the brake is configured to be disposed between the suspension central axis and the wheel hub, the slave cylinder oil port of the brake is connected to one end of a brake oil pipe, the brake oil pipe is configured to be disposed on the suspension central axis, the other end of the brake oil pipe is connected to one end of a brake oil pipe hose, the brake oil pipe hose is configured to be disposed on the vehicle body, and the other end of the brake oil pipe hose is connected to a master cylinder through a brake pipeline. Since the brake is disposed between the suspension central axis and the wheel hub, the brake can be disposed in a limited space, occupying a small space. Since the brake oil pipe hose can deform as the brake oil pipe rotates and cannot fall off, braking can also be performed when the steering angle of the steering wheel is large. The braking distance is reduced, the braking force on the steering wheel is increased, and the safety factor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle braking, and more specifically, to a steering wheel braking mechanism. In addition, the present invention also relates to a three-point engineering vehicle including the above-mentioned steering wheel braking mechanism. Background Art

[0002] For three-point engineering vehicles, due to the small layout space and large swing angle of the steering wheels, the steering wheels are not equipped with brakes and rely solely on the braking of the two wheels on the drive axle. The braking distance is long, the braking force is small, and the safety factor is low.

[0003] In summary, how to configure brakes on the steering wheels to reduce the braking distance and improve safety is an urgent problem for those skilled in the art at present. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a steering wheel braking mechanism provided on the steering wheel, which reduces the braking distance and improves safety.

[0005] Another object of the present invention is to provide a three-point engineering vehicle including the above-mentioned steering wheel braking mechanism.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A steering wheel braking mechanism includes: a brake for braking the hub, the brake is used to be arranged between the suspension central shaft and the hub, the slave cylinder oil port of the brake is connected to one end of a brake oil pipe, the brake oil pipe is used to be arranged on the suspension central shaft, the other end of the brake oil pipe is connected to one end of a brake oil pipe hose, the brake oil pipe hose is used to be arranged on the vehicle body, and the other end of the brake oil pipe hose is connected to a brake master cylinder through a brake pipeline.

[0008] Preferably, the brake oil pipe is arranged on the inner end face of the suspension central shaft through a first bracket.

[0009] Preferably, the first bracket is a Z-shaped bracket, and the Z-shaped bracket includes a first vertical plate and a second vertical plate that are parallel to each other, and the lower end of the first vertical plate is connected to the upper end of the second vertical plate through a cross plate.

[0010] Preferably, a first through hole is provided on the plate surface of the first vertical plate, and the brake oil pipe hose is arranged in the first through hole.

[0011] Preferably, the brake oil pipe includes a rubber hose, and a first pipe joint and a second pipe joint are respectively provided at both ends of the rubber hose. The first pipe joint is arranged in the slave cylinder oil port, and the second pipe joint is connected to the brake oil pipe hose.

[0012] Preferably, a protection spring is provided on the rubber hose to prevent the brake oil pipe from colliding with the vehicle body when the brake oil pipe rotates with the wheel. One end of the protection spring abuts against the first pipe joint, and the other end abuts against the second pipe joint.

[0013] Preferably, third and fourth pipe joints are respectively provided at both ends of the brake oil pipe hose. An external first thread is provided on the outer periphery of the third pipe joint, and two clamping nuts are provided on the first external thread and respectively clamped on two end faces of the first through hole.

[0014] Preferably, the brake oil pipe hose is arranged on the vehicle body through a second bracket, and the second bracket is a plate-shaped bracket.

[0015] Preferably, the brake pipeline is a hard brake oil pipe. One end of the hard brake oil pipe is connected to the brake oil pipe hose, and the other end is connected to a three-way joint. The three-way joint is also used to connect to a master brake cylinder and a rear axle brake.

[0016] A three-point engineering vehicle includes: a suspension. A suspension central shaft is provided at the center of the suspension. A wheel hub is installed outside the suspension central shaft. A steering wheel braking mechanism as described in any one of the above is provided between the suspension central shaft and the wheel hub.

[0017] During braking, the brake fluid is input from the master brake cylinder, passes through the brake pipeline to the brake oil pipe hose, then enters the brake oil pipe, and is input from the brake oil pipe to the slave cylinder, so that the brake acts on the wheel hub to brake the steering wheel, thereby achieving the effect of braking the steering wheel. Since the brake is provided between the suspension central shaft and the wheel hub, the brake can be arranged in a limited space, occupying a small space. Since the brake oil pipe hose can deform with the rotation of the brake oil pipe and cannot fall off, braking can also be performed when the steering angle of the steering wheel is large. The braking distance is reduced, the braking force on the steering wheel is increased, and the safety factor is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0019] Figure 1 It is a cross-sectional view of the steering wheel braking mechanism provided by the present invention;

[0020] Figure 2 It is an exploded view of the steering wheel braking mechanism provided by the present invention;

[0021] Figure 3Schematic diagram of the brake oil pipe hose provided by the present invention;

[0022] Figure 4 Schematic diagram of the brake oil pipe provided by the present invention.

[0023] Figures 1-4 In which:

[0024] 1 - Second screw, 2 - Second washer, 3 - First bracket, 4 - Brake oil pipe hose, 5 - Clamping nut, 6 - Second bracket, 7 - Brake oil pipe, 8 - Brake, 9 - First washer, 10 - First screw, 11 - Extended bleeding screw, 12 - Wheel hub, 13 - Tapered roller bearing, 14 - Locking nut, 15 - Third bolt, 16 - Third washer, 17 - Lock washer, 18 - Fourth bolt, 19 - Fourth washer, 20 - Gasket, 21 - End cover, 22 - Wheel hub bolt, 23 - Fifth washer, 24 - Spherical nut, 25 - Wheel, 26 - Suspension center shaft, 27 - Suspension, 28 - Oil seal, 29 - Fifth nut, 30 - Brake oil pipe hard pipe, 31 - Three - way joint, 32 - Rear axle brake, 33 - Master brake cylinder, 34 - Brake oil pot, 35 - Protection spring, 36 - Rubber hose, 37 - First pipe joint, 38 - Second pipe joint. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] The core of the present invention is to provide a steering wheel braking mechanism arranged on the steering wheel, which reduces the braking distance and improves safety.

[0027] Another core of the present invention is to provide a three - point engineering vehicle including the above - mentioned steering wheel braking mechanism.

[0028] Please refer to Figures 1 to 4 , Figure 1 Cross - sectional view of the steering wheel braking mechanism provided by the present invention; Figure 2 Exploded view of the steering wheel braking mechanism provided by the present invention; Figure 3 Schematic diagram of the brake oil pipe hose provided by the present invention; Figure 4 Schematic diagram of the brake oil pipe provided by the present invention.

[0029] A steering wheel braking mechanism, comprising: a brake 8 for braking the wheel hub 12, the brake 8 being arranged between the suspension central shaft 26 and the wheel hub 12. The slave cylinder oil port of the brake 8 is connected to one end of a brake oil pipe 7, the brake oil pipe 7 being arranged on the suspension central shaft 26. The other end of the brake oil pipe 7 is connected to one end of a brake oil pipe hose 4, the brake oil pipe hose 4 being arranged on the vehicle body. The other end of the brake oil pipe hose 4 is connected to a master cylinder 33 through a brake pipeline.

[0030] It should be noted that the brake 8 can be a disc brake 8 or a drum brake 8. A central shaft is arranged at the center of the suspension 27, the wheel hub 12 is installed outside the suspension central shaft 26, and the brake 8 is arranged between the wheel hub 12 and the central shaft. The brake 8 is arranged in a limited space, and the steering wheel can be braked. The brake 8 can be fixed to the suspension 27 by 4 first washers 9 and 4 first screws 10.

[0031] The brake 8 has a slave cylinder oil port. By using the brake oil pipe 7 and the slave cylinder oil port, brake fluid can be input into the slave cylinder of the brake 8, so that the brake 8 can brake the wheel hub 12.

[0032] Preferably, the brake 8 is provided with a bleeding port, and the bleeding port is provided with an extended bleeding screw 11. The extended bleeding screw 11 passes through the notch of the suspension 27 and is screwed into the bleeding port on the slave cylinder of the brake 8. When inputting brake fluid into the slave cylinder, it is necessary to discharge the internal air. The slave cylinder oil port and the bleeding port can be opened simultaneously, and the internal air of the slave cylinder can be discharged while inputting brake fluid. Moreover, since compressed air may be generated in the brake fluid during braking and will affect the braking effect after entering the slave cylinder, when there is air in the slave cylinder, the bleeding port can be opened to discharge the air. In addition, the brake fluid plays a role in force transmission throughout the braking process. The brake fluid has the property of absorbing water. If it is not replaced for a long time, it will corrode the braking system and pose a hidden danger to driving. At the same time, since the boiling point of the brake fluid will decrease after absorbing water, it is easy to cause insufficient braking pressure and affect the braking effect. Therefore, it is necessary to replace the brake fluid after a preset stroke. The slave cylinder oil port and the bleeding port can be opened simultaneously, and new brake fluid can be input into the slave cylinder, so that the original brake fluid is discharged from the bleeding port.

[0033] The brake oil pipe 7 is arranged on the suspension central shaft 26, so that the brake oil pipe 7 can rotate synchronously with the rotation of the suspension central shaft 26, and interference between the brake oil pipe 7 and other mechanisms can be prevented. Since the brake oil pipe 7 is connected to the brake pipeline through the brake oil pipe hose 4, when the brake oil pipe 7 rotates, the brake oil pipe hose 4 will not be separated from the brake oil pipe 7, and the use of a hose can prevent the brake oil pipe hose 4 from breaking.

[0034] During braking, the brake fluid is input from the master cylinder 33, passes through the brake pipeline to the brake pipe hose 4, then enters the brake pipe 7, and is input from the brake pipe 7 into the slave cylinder, so that the brake 8 brakes the wheel hub 12, thereby achieving the effect of braking the steering wheel. Since the brake 8 is arranged between the suspension central axis 26 and the wheel hub 12, the brake 8 can be arranged within a limited space, occupying a small space. Since the brake pipe hose 4 can deform as the brake pipe 7 rotates and cannot fall off, braking can also be performed when the steering angle of the steering wheel is large. The braking distance is reduced, the braking force on the steering wheel is increased, and the safety factor is improved.

[0035] On the basis of the above embodiment, as a further preference, the brake pipe 7 is arranged on the inner end face of the suspension central axis 26 through the first bracket 3.

[0036] It should be noted that the lower part of the first bracket 3 can be installed on the inner end face of the suspension central axis 26 in a fixed or detachable manner, preferably in a detachable manner. Specifically, at least one first threaded hole is arranged on the inner end face of the suspension central axis 26, and second threaded holes with the same number and corresponding positions are arranged on the first bracket 3. The first bracket 3 is installed on the inner end face of the suspension central axis 26 through the second screw 1. In order to increase the stability of the fixation of the second screw 1 to the first bracket 3, a second washer 2 is arranged between the second screw 1 and the first bracket 3. The brake pipe 7 is arranged on the first bracket 3 and can be installed on the first bracket 3 in a detachable manner. By arranging the first bracket 3, the fixation of the brake pipe 7 is facilitated.

[0037] On the basis of the above embodiment, as a further preference, the first bracket 3 is a Z-shaped bracket. The Z-shaped bracket includes a first vertical plate and a second vertical plate that are parallel to each other. The lower end of the first vertical plate is connected to the upper end of the second vertical plate through a cross plate.

[0038] It should be noted that the first vertical plate is used to install the brake pipe 7, the second vertical plate fits on the inner end face of the suspension central axis 26, and the brake pipe 7 is arranged axially perpendicular to the plate surface of the first vertical plate, so that the brake pipe 7 can be parallel to the axis of the suspension central axis 26, facilitating the synchronous movement of the brake pipe 7 and the suspension central axis 26.

[0039] On the basis of the above embodiment, as a further preference, a first through hole is arranged on the plate surface of the first vertical plate, and the brake pipe hose 4 is arranged in the first through hole.

[0040] It should be noted that the brake oil pipe hose 4 can be set with an outer diameter slightly smaller than that of the first through hole, and the first through hole is used to clamp the outside of the brake oil pipe hose 4. Alternatively, the brake oil pipe hose 4 can be fixed by other fixing devices. Setting the first through hole to install the brake oil pipe hose 4 is convenient for installing the brake oil pipe hose 4, and under the limiting effect of the first through hole, the brake oil pipe hose 4 can be prevented from swaying randomly.

[0041] Based on the above embodiments, as a further preference, the brake oil pipe 7 includes a rubber hose 36. First pipe joints 37 and second pipe joints 38 are respectively provided at both ends of the rubber hose 36. The first pipe joint 37 is arranged in the oil port of the slave cylinder, and the second pipe joint 38 is connected to the brake oil pipe hose 4.

[0042] It should be noted that when the brake oil pipe 7 is arranged, due to the rotation of the wheel 25, the length of the brake oil pipe 7 cannot be too long, otherwise the brake oil pipe hose 4 will interfere with the vehicle frame when the wheel 25 rotates. Therefore, the length of the brake oil pipe 7 can be set to 127 mm. In the actual processing process, due to the too short length of this brake oil pipe 7, conventional brake hard pipes cannot be processed because the flared joint of the brake oil pipe 7 is formed by clamping the pipe fitting with a fixture and extruding it, and the fixture has a minimum requirement for the length dimension of the pipe fitting, which is 220 mm, so it cannot be produced. By changing the middle pipe to a rubber hose 36 and installing the first pipe joint 37 and the second pipe joint 38 at both ends of the rubber hose 36, the problem that the brake hard pipe cannot be processed due to its too short length is solved, and at the same time, the risk of subsequent oil leakage is reduced.

[0043] Based on the above embodiments, as a further preference, a protection spring 35 is provided on the rubber hose 36 to prevent the brake oil pipe hose 4 from colliding with the vehicle body when the brake oil pipe 7 rotates with the wheel 25. One end of the protection spring 35 abuts against the first pipe joint 37, and the other end abuts against the second pipe joint 38.

[0044] It should be noted that since the protection spring 35 is elastic, it can be stretched, shortened, bent, and restored. When the rubber hose 36 rotates, one side of the protection spring 35 will be compressed and the other side will be elongated, and the protection spring 35 as a whole will be bent. When the rubber hose 36 is restored, the protection spring 35 will be restored and always protect the outside of the brake oil pipe hose 4, preventing the brake oil pipe hose 4 from interfering with the vehicle body during the rotation of the wheel 25.

[0045] Based on the above embodiments, as a further preference, third pipe joints and fourth pipe joints are respectively provided at both ends of the brake oil pipe hose 4. A first external thread is provided on the outer periphery of the third pipe joint, and two clamping nuts 5 are provided on the first external thread and respectively clamped on the two end faces of the first through hole.

[0046] It should be noted that the distance between the clamping nuts 5 is adjustable, and the clamping nuts 5 can be removed along the first external thread. During installation, the outer clamping nut 5 can be removed, and then the third pipe joint provided with the first external thread is passed through the first through hole. The removed clamping nut 5 is loaded onto the third pipe joint along the first external thread. At this time, the first vertical plate is located between the two clamping nuts 5. Adjust the positions of the two clamping nuts 5 on the first external thread and clamp the two end faces of the first through hole. The structure provided in this embodiment facilitates the setting of the third pipe joint in the first through hole and is convenient for disassembly and assembly.

[0047] On the basis of the above embodiment, as a further preference, the brake oil pipe hose 4 is arranged on the vehicle body through the second bracket 6, and the second bracket 6 is a plate-shaped bracket.

[0048] It should be noted that the lower part of the plate-shaped bracket is fixedly or detachably arranged on the vehicle body, and the plate surface of the plate-shaped bracket is parallel to the plate surface of the first vertical plate, so that when the wheel hub 12 returns to the correct position, the axes of the brake oil pipe hose 4 and the brake oil pipe 7 are on the same straight line. When the wheel hub 12 rotates left and right to the maximum position respectively, the deformation degrees of the brake oil pipe hose 4 are the same, and the fatigue ranges of the brake oil pipe hose 4 deforming to both sides are the same, which can increase the service life of the brake oil pipe hose 4.

[0049] On the basis of the above embodiment, as a further preference, the brake pipeline is a brake oil pipe hard pipe 30. One end of the brake oil pipe hard pipe 30 is connected to the brake oil pipe hose 4, and the other end is connected to the three-way joint 31. The three-way joint 31 is also used to connect to the brake master cylinder 33 and the rear axle brake 32.

[0050] It should be noted that the brake oil in the brake oil pot 34 is output to the brake master cylinder 33, and the brake master cylinder 33 is output to the three-way joint 31 through a pipeline, and flows into the wheel cylinder of the front wheel brake 8 and the wheel cylinder of the rear wheel brake 8 respectively through the three-way joint 31, forming brakes on the front wheels and the rear wheels simultaneously. The structure is simple, can brake the front wheels and the rear wheels simultaneously, increases the braking force, and reduces the braking distance.

[0051] In addition to the above, the present invention also provides a three-point engineering vehicle, including: a suspension 27. A suspension central shaft 26 is provided at the center of the suspension 27, a wheel hub 12 is installed outside the suspension central shaft 26, and a steering wheel braking mechanism disclosed in any one of the above embodiments is provided between the suspension central shaft 26 and the wheel hub 12. The three-point engineering vehicle provided by the present application can brake the steering wheel and the driving wheel simultaneously, reduces the braking distance, increases the braking force on the steering wheel, and improves the safety factor.

[0052] On the basis of the above embodiments, as a further preference, the wheel hub 12 is mounted on the outer side of the suspension central shaft 26 by a pair of tapered roller bearings 13. The space between the raceways of the tapered roller bearings 13 is filled with grease, and the inner ends of the tapered roller bearings 13 are sealed with oil seals 28.

[0053] External threads are provided on the outer periphery of the outer end of the suspension central shaft 26. The locking nut 14 is slowly screwed onto the suspension central shaft 26 through the external threads until the tapered roller bearings 13 are pressed tightly. To prevent the locking nut 14 from loosening, the anti-loosening washer 17 is fixed to the outer end face of the locking nut 14 with 4 third bolts 15 and 4 third washers 16. The paper gasket 20 and the end cover 21 are sequentially fixed to the end face of the wheel hub 12 with 3 fourth bolts 18 and 3 fourth washers 19. Six wheel bolts 22 are respectively fixed in six holes on the wheel hub 12 with 6 fifth washers 23, 6 fifth nuts 29 and 6 spherical nuts 24. The wheel 25 is fixed to the wheel hub 12 with 6 spherical nuts 24.

[0054] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts among the various embodiments, reference can be made to each other.

[0055] The above has introduced in detail the steering wheel braking mechanism and the three-point engineering vehicle provided by the present invention. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A steering wheel braking mechanism, characterized in that, Comprising: A brake (8) for braking a brake hub (12), the brake (8) being adapted to be disposed between a suspension central shaft (26) and the hub (12), an oil port of a wheel cylinder of the brake (8) being connected to one end of a brake oil pipe (7), the brake oil pipe (7) being adapted to be disposed on the suspension central shaft (26), the other end of the brake oil pipe (7) being connected to one end of a brake oil pipe hose (4), the brake oil pipe hose (4) being adapted to be disposed on a vehicle body, and the other end of the brake oil pipe hose (4) being connected to a master brake cylinder (33) through a brake pipeline; The brake oil pipe (7) is disposed on an inner end face of the suspension central shaft (26) through a first bracket (3); the first bracket (3) is a Z-shaped bracket, the Z-shaped bracket comprising a first vertical plate and a second vertical plate that are parallel to each other, a lower end of the first vertical plate and an upper end of the second vertical plate being connected by a cross plate; a first through hole is provided on a plate surface of the first vertical plate, and the brake oil pipe hose (4) is disposed in the first through hole; The first vertical plate is for mounting the brake oil pipe (7), the brake oil pipe (7) being axially perpendicular to the plate surface of the first vertical plate, the second vertical plate being attached to the inner end face of the suspension central shaft (26), and the brake oil pipe (7) being parallel to an axis of the suspension central shaft (26); The brake oil pipe hose (4) is disposed on the vehicle body through a second bracket (6), the second bracket (6) being a plate-shaped bracket, a lower portion of the plate-shaped bracket being fixedly or detachably disposed on the vehicle body, and a plate surface of the plate-shaped bracket being parallel to the plate surface of the first vertical plate.

2. The steering wheel braking mechanism according to claim 1, characterized in that, The brake oil pipe (7) comprises a rubber hose (36), first and second pipe joints (37, 38) being respectively provided at two ends of the rubber hose (36), the first pipe joint (37) being disposed in the oil port of the wheel cylinder, and the second pipe joint (38) being connected to the brake oil pipe hose (4).

3. The steering wheel braking mechanism according to claim 2, wherein, A protection spring (35) is provided on the rubber hose (36) to prevent the brake oil pipe hose (4) from colliding with the vehicle body when the brake oil pipe (7) rotates with a wheel (25), one end of the protection spring (35) abutting against the first pipe joint (37) and the other end abutting against the second pipe joint (38).

4. The steering wheel braking mechanism according to claim 3, characterized in that Third and fourth pipe joints are respectively provided at two ends of the brake oil pipe hose (4), a first external thread is provided on an outer periphery of the third pipe joint, and two clamping nuts (5) are provided on the first external thread and respectively clamp two end faces of the first through hole.

5. The steering wheel braking mechanism according to any one of claims 1 to 4, characterized in that The brake pipeline is a brake oil pipe hard pipe (30), one end of the brake oil pipe hard pipe (30) being connected to the brake oil pipe hose (4) and the other end being connected to a tee joint (31), the tee joint (31) further being adapted to be connected to the master brake cylinder (33) and a rear axle brake (32).

6. A three-point support construction vehicle, characterized in that, Comprising: Suspension (27), a suspension central axis (26) is provided at the center of the suspension (27), a wheel hub (12) is installed outside the suspension central axis (26), and a steering wheel braking mechanism according to any one of claims 1 to 5 is provided between the suspension central axis (26) and the wheel hub (12).

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