CN212177723U

CN212177723U - Integrated parking braking and service braking's arrestment mechanism

Info

Publication number: CN212177723U
Application number: CN202020277539.2U
Authority: CN
Inventors: 王志龙; 常方坡; 刘海林; 袁正; 刘兵
Original assignee: Anhui Heli Co Ltd
Current assignee: Anhui Heli Co Ltd
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-12-18
Anticipated expiration: 2030-03-09

Abstract

The utility model relates to a fork truck transaxle technical field discloses a brake mechanism of integrated parking braking and service braking, including brake piston, friction disc, spacer and casing, friction disc, spacer are close to the brake piston installation in proper order, the semi-axis is connected through the internal and external spline cooperation with the friction disc, tire assembly is connected with the semi-axis, tire assembly follows the semi-axis, the friction disc rotates together, the spacer is installed on the casing and rather than fixed connection, promote brake piston and can compress tightly friction disc and spacer, brake piston includes the piston body, first connecting piece and return spring, the piston body is installed on the casing through first connecting piece, install two at least thrust unit on the brake piston, thrust unit can promote the piston body to move to one side that is close to the friction disc and compress return spring; the utility model discloses one set of brake piston of sharing and friction disc, spacer, this integrated mechanism is simple compact, has reduced the space occupancy of component by a wide margin, has effectively reduced product cost simultaneously.

Description

Integrated parking braking and service braking's arrestment mechanism

Technical Field

The utility model relates to a fork truck transaxle technical field, more specifically say, in particular to integrated parking braking and service braking's arrestment mechanism.

Background

The vehicle is provided with a parking brake and a service brake, wherein the service brake is a brake used by the vehicle during running and mainly used for decelerating and parking; the parking brake is the brake used when the vehicle is in a static state and mainly has the function of preventing the vehicle from sliding forwards and backwards. In the prior art, parking braking and service braking of a vehicle are two mutually independent systems, friction torque is generated by pressing a friction plate and a spacer, the spacer and a shell are in a relatively static state, the friction plate is connected with a half shaft and a tire assembly, and the generated friction torque finally holds the tire assembly to realize parking braking, so that the braking effect is stable; the existing brake mechanism comprises two independent brake mechanisms, namely a parking brake mechanism and a service brake mechanism, needs two sets of brake pistons, friction plates and separating pieces, and has the disadvantages of complex structure, low space utilization rate and high product cost.

How to solve the technical problems becomes a difficult problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mechanism integrating a parking brake system and a service brake system, which optimizes the mechanism layout space by reasonably arranging related structures under the condition of requiring the compact size of a forklift drive axle, and arranges the parking brake and the service brake of the drive axle in a certain space to meet the service function of a vehicle; when the vehicle is parked, the pull rod is pulled by the pull rope to push the brake piston to move forward, so that the friction plate and the spacer are pressed tightly, and parking brake is realized; when the vehicle is braked, the brake piston moves forward under the action of oil pressure to tightly press the friction plate and the spacer plate, so that the vehicle brake is realized; the parking brake system and the service brake system share one set of brake piston, friction plate and spacer, the integrated mechanism is simple and compact, the space occupancy rate of the structural member is greatly reduced, and meanwhile, the product cost is effectively reduced.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a braking mechanism integrating parking braking and service braking comprises a braking piston, a friction plate, a spacer and a shell, wherein the friction plate and the spacer are sequentially installed close to the braking piston, a half shaft and the friction plate are connected in a matched mode through an internal spline and an external spline, a tire assembly is connected with the half shaft and rotates along with the half shaft and the friction plate, the spacer is installed on the shell and is fixedly connected with the shell, the friction plate and the spacer can be pressed by pushing the braking piston, braking is achieved in the process that the friction plate is pressed, the braking mechanism is the prior art, and the prior art is not repeated, the braking piston comprises a piston body, a first connecting part and a first return spring, the piston body is movably installed on the shell through the first connecting part, at least two pushing devices are installed on the braking piston body, the pushing devices can push the piston body to move to one side close to the friction plate and compress the, at least one of the pushing devices is a mechanical pushing device, the mechanical pushing device can be a parking braking system, at least one of the pushing devices is a hydraulic pushing device, and the hydraulic pushing device can be a service braking system; the utility model discloses one set of brake piston of sharing and friction disc, spacer, this integrated mechanism is simple compact, has reduced the space occupancy of component by a wide margin, has effectively reduced product cost simultaneously.

Furthermore, at least one of the pushing devices is a mechanical pushing device, the mechanical pushing device comprises a brake pull rod, a brake cam shaft and a fixed support, the brake pull rod, the brake cam shaft and the fixed support form a brake shifting fork, the fixed support is installed on the shell, the brake pull rod and the brake cam shaft are both installed on the fixed support, the brake pull rod can drive the brake cam shaft to rotate through rotation, and the brake cam shaft can push the piston body to move to one side close to the friction plate in the rotating process. The inside and outside splined connection of braking pull rod and braking camshaft accessible, the two also can be through other structure fixed connection or welding, as long as enable the braking pull rod drive the braking camshaft rotate can, here should not become the utility model discloses a restriction, braking piston and braking shift fork are installed on the casing. The brake pull rod is connected with the brake pull rod in the brake shifting fork through the inhaul cable to form a parking brake route.

Furthermore, the fixed support is installed on the shell through a second connecting part, the second connecting part comprises a connecting block fixedly connected with the fixed support, the connecting block is fixedly connected with the shell through a limiting bolt, the limiting bolt is used for adjusting a contact gap between the cam table and the piston boss, the cam table is installed on a brake cam shaft, the piston boss is installed on the piston body, one end, away from the brake pull rod, of the brake cam shaft is provided with the cam table, the piston boss is installed in the piston body, the position of the piston boss is matched with that of the cam table, the cam shaft is driven to rotate in the process of rotating the brake pull rod, the cam table is driven to contact with the piston boss and extrude the piston boss in the process of rotating the cam shaft, and then the piston body is pressed.

Furthermore, the brake pull rod is fixedly connected with one end of a second return spring, the other end of the second return spring is connected with the fixing part, external force is removed after the brake pull rod is pulled, and the brake pull rod can be reset through the return spring. The fixing part can be a fixing support, a connecting block or a shell.

Furthermore, a pulling part is installed on the brake pull rod, the pulling part comprises a brake pull rod, and an inhaul cable is installed between the brake pull rod and the brake pull rod. The brake pull rod can be driven to be pulled by pulling the brake pull rod through the pull cable.

Furthermore, at least one of the pushing devices is a hydraulic pushing device, the hydraulic pushing device comprises a brake pump, the brake pump is connected with the input end of the pipeline, the output end of the pipeline acts the oil pressure on the piston body through a third connecting structure, the motor drives the oil pump to pump oil, the oil pump reaches the brake pump through an oil pipe, and the brake pump is connected with the shell through the pipeline to form a service braking route.

Further, the third connecting structure comprises an oil hole formed in the shell, the output end of the oil pipe is installed in the oil hole, a cavity with a variable volume is formed between the shell and the piston body, the cavity is preferably a cavity, the oil hole is communicated with the cavity, and the cavity is sealed through the first sealing ring and the second sealing ring.

Furthermore, the hydraulic pushing device also comprises a trigger motor and an oil pump, wherein the trigger motor is used for controlling the oil pump to pump oil, and the oil pumped by the oil pump is conveyed to the brake pump through an oil pipe.

Further, the trigger motor controls the oil pump to start after receiving a trigger signal, wherein the trigger signal is a signal generated after the brake pedal is stepped on.

Further, the first connecting part is a mounting bolt, the mounting bolt comprises a screw rod part and a limiting part, one end of the screw rod part is fixedly connected with the limiting part, the other end of the screw rod part penetrates through a through hole formed in the piston body and is fixedly mounted on the shell, and the piston body can move along the extending direction of the screw rod part and is limited by the limiting part.

Furthermore, the first return spring is sleeved on the mounting bolt, and the mounting bolt is used for mounting the first return spring and the piston body on the shell.

Compared with the prior art, the utility model has the advantages of:

the scheme provides a mechanism integrating a parking brake system and a service brake system, under the condition that the size of a forklift drive axle is required to be compact, the arrangement space of the mechanism is optimized through reasonably arranging related structures, and the parking brake and the service brake of the drive axle are arranged in a certain space so as to meet the use function of a vehicle; when the vehicle is parked, the pull rod is pulled by the pull rope to push the brake piston to move forward, so that the friction plate and the spacer are pressed tightly, and parking brake is realized; when the vehicle is braked, the brake piston moves forward under the action of oil pressure to tightly press the friction plate and the spacer plate, so that the vehicle brake is realized; the parking brake system and the service brake system share one set of brake piston, friction plate and spacer, the integrated mechanism is simple and compact, the space occupancy rate of the structural member is greatly reduced, and meanwhile, the product cost is effectively reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the middle brake shift fork of the present invention;

fig. 3 is a schematic structural diagram of the brake piston of the present invention;

FIG. 4 is a schematic structural view of a brake shift fork of the present invention;

fig. 5 is a schematic structural diagram of a third connection structure of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.

The first embodiment is as follows:

referring to fig. 1 and 3, a parking brake and service brake integrated brake mechanism includes a brake piston 200, a friction plate 300, a spacer 400 and a housing 500, the housing 500 is equivalent to a base and is connected to a vehicle frame, the friction plate 300 and the spacer 400 are sequentially installed adjacent to the brake piston 200, a half shaft 800 is connected to the friction plate 300 through an internal and external spline, the half shaft 800 rotates together with the friction plate 300, a tire assembly 900 is connected to the half shaft 800, the tire assembly 900 rotates together with the half shaft 800 and the friction plate 300, the spacer 400 is installed on the housing 500 and is fixedly connected thereto, as shown in fig. 4, the brake piston 200 is pushed to compress the friction plate 300 and the spacer 400, and braking is achieved during the compression of the friction plate 300, which is prior art and not described herein, the brake piston 200 includes a piston body 210, a first connecting component and a first return spring 230, the piston body 210 is movably installed on the housing 500 through a first connecting component, the brake piston is provided with at least two pushing devices, at least one pushing device is used for service braking, at least one pushing device is used for parking braking, the pushing devices can push the piston body 210 to move towards one side close to the friction plate 300 and compress the first return spring 230, when the vehicle is parked, the pull rod is pulled by the inhaul cable to push the brake piston to move forwards, the friction plate and the spacer are pressed tightly, and the parking braking is realized; when the vehicle is braked, the brake piston moves forward under the action of oil pressure to tightly press the friction plate and the spacer plate, so that the vehicle brake is realized; the utility model discloses one set of brake piston of sharing and friction disc, spacer, this integrated mechanism is simple compact, has reduced the space occupancy of component by a wide margin, has effectively reduced product cost simultaneously.

In this embodiment, at least one of the pushing devices is a mechanical pushing device, which is energy-saving and suitable for parking braking, as shown in fig. 2 and fig. 4, the mechanical pushing device includes a brake pull rod 110, a brake cam shaft 120 and a fixed support 130, which form a brake yoke 100, the fixed support 130 is mounted on a housing 500, the brake pull rod 110 and the brake cam shaft 120 are both mounted on the fixed support 130, the brake pull rod 110 rotates to drive the brake cam shaft 120 to rotate, the brake pull rod 110 and the brake cam shaft 120 can be connected by an internal spline and an external spline, and the brake cam shaft 120 can push the piston body 210 to move toward a side close to the friction plate 300 during the rotation process. The brake lever 110 and the brake cam shaft 120 may be connected by an internal and external spline, and the brake piston 200 and the brake fork 100 are mounted on the housing 500. The brake lever 600 is connected to the brake lever 110 of the brake fork 100 by a cable 610, and constitutes a parking brake line.

In this embodiment, the fixed support 130 is installed on the housing 500 through a second connection component, the second connection component includes a connection block fixedly connected with the fixed support 130, the connection block is fixedly connected with the housing 500 through a limit bolt 150, the limit bolt 150 is used for adjusting a contact gap between the cam table 121 and the piston boss 211, the cam table 121 is installed on the braking cam shaft 120, the piston boss 211 is installed on the piston body 210, the cam table 121 is installed at one end of the braking cam shaft 120 away from the braking pull rod 110, the piston boss 211 is installed in the piston body 210, the position of the piston boss 211 matches with the position of the cam table 121, the cam shaft 120 is driven to rotate during the rotation of the braking pull rod 110, the cam shaft 120 is driven to contact with and extrude the piston boss 211 during the rotation of the cam shaft 120, and the piston body 210 is further pressed.

In this embodiment, the brake pull rod 110 is fixedly connected to one end of the second return spring 140, and the other end of the second return spring 140 is connected to the fixing member, so that the external force is removed by pulling the brake pull rod 110, and the brake pull rod 110 can be reset by the return spring. The fixing member may be the fixing support 130, the connecting block or the housing 500.

In this embodiment, the brake pull rod 110 is provided with a pulling member, the pulling member includes a brake pull rod 600, a cable 610 is installed between the brake pull rod 600 and the brake pull rod 110, and the brake pull rod 600 is pulled to drive the brake pull rod 110 to increase the control range of braking.

In this embodiment, at least one of the pushing devices is a hydraulic pushing device, the hydraulic pushing device includes a brake pump 700, the brake pump 700 is connected to the input end of the pipeline 780, the output end of the pipeline 780 applies oil pressure to the piston body 210 through the third connecting structure, the motor 750 drives the oil pump 760 to pump oil, the oil reaches the brake pump 700 through the oil pipe 770, the brake pump 700 is connected to the housing 500 through the pipeline 780, a service braking route is formed, the hydraulic pushing device is more labor-saving, stable in effect and suitable for service braking.

In this embodiment, please refer to fig. 5, the third connecting structure includes an oil hole 510 formed in the housing 500, an output end of the oil pipe 770 is installed in the oil hole 510, a cavity with a variable volume is formed between the housing 500 and the piston body 210, the cavity is preferably a cavity, the oil hole 510 is communicated with the cavity, the cavity is sealed by the first sealing ring 240 and the second sealing ring 250, the input oil can fill the oil hole 510 and the cavity, and further the piston body 210 is pressed, so as to achieve the braking effect, and the third connecting structure is simple in structure and has a good effect.

In this embodiment, the hydraulic pushing apparatus further includes a trigger motor 750 and an oil pump 760, the trigger motor 750 is used to control the oil pump 760 to pump oil, the oil pumped by the oil pump 760 is delivered to the brake pump 700 through an oil pipe 770, and the brake system is controlled by receiving a signal, so that the control is simple and easy, and the operation is convenient.

In this embodiment, the trigger motor 750 controls the oil pump to start after receiving a trigger signal, wherein the trigger signal is a signal generated after the brake pedal 710 is pressed.

In this embodiment, the housing 500 is provided with a plurality of mounting bolts 220, each mounting bolt includes a screw portion and a limiting portion, one end of the screw portion is fixedly connected to the limiting portion, the other end of the screw portion penetrates through a through hole formed in the piston body 210 and is fixedly mounted on the housing 500, the piston body 210 can move along the extending direction of the screw portion and is limited by the limiting portion, so that the piston body 210 is movably mounted on the housing 500, and the mounting screws 220 have guiding and positioning functions on the piston body, so that the piston body is more stable.

In this embodiment, the first return spring 230 is sleeved on the movable mounting screw 220, the installation space of the movable mounting screw can be saved due to the sleeved installation, the structure of the movable mounting screw is more compact, in addition, the mounting screw 220 has a guiding effect on the first return spring 230, so that the first return spring 230 is more stable in the compression and reset processes, the service life of the movable mounting screw is prolonged, and the mounting screw 220 installs the first return spring 230 and the piston body 210 on the housing 500.

When parking braking is carried out, the parking braking pull rod 600 is pulled, the braking pull rod 110 moves under the action of the pull cable 610, the braking pull rod 110 is connected with the braking cam shaft 120 through the internal and external splines, at the moment, the braking cam shaft 120 rotates by taking the shaft end as the center of a circle, meanwhile, the cam table 121 on the braking cam shaft 120 also rotates by taking the shaft end as the center of a circle, the cam table 121 is in contact with the piston table 211 on the piston body 210, the piston body 210 is pushed to move forwards by the rotation of the cam table 121, the friction plate 300 and the separation plate 400 are pressed by the braking piston 200, at the moment, the friction plate 300 and the separation plate 400 generate friction torque, the separation plate 400 and the shell 500 are in a relatively static state, the friction plate 300 is connected with the half shaft 800 and the tire assembly 900, and finally the. When the parking brake lever 600 is released, the brake piston 200 is pushed to reset under the spring force of the first return spring 230, and the brake lever 110 is also reset under the spring force of the second return spring 140 in the brake fork 100, at this time, the friction plate 300 and the spacer 400 are not extruded any more, the friction torque disappears, and the parking brake is reset and released.

When service braking is carried out, the brake pedal 710 is stepped down, the motor 750 is triggered to drive the oil pump 760 to pump oil, the oil reaches the brake pump 700 through the oil pipe 770, the oil reaches the shell 500 through the oil pipe 780, the oil hole 510 forms a sealed cavity with the shell 500, the piston body 210, the first sealing ring 240 and the second sealing ring 250, oil from the oil pipe 780 is filled in the cavity and pushes the brake piston 200 to move, the brake piston 200 compresses the friction plate 300 and the spacer 400, at the moment, the friction plate 300 and the spacer 400 generate friction torque, the same as that during parking braking, the tire assembly 900 is finally embraced, and service braking is realized. After the brake pedal 710 is released, the oil in the oil pipe 780 is cut off, the brake piston 200 is pushed to reset under the spring force of the first return spring 230, the friction plate 300 and the spacer 400 are not squeezed any more, the friction torque disappears, and the service brake resets.

This is the principle of operation of the integrated parking and service brake mechanism and is well within the skill of those skilled in the art without further details being presented herein.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes and modifications can be made by the owner within the scope of the appended claims, and the protection scope of the present invention should not be exceeded by the claims.

Claims

1. A braking mechanism integrating parking braking and service braking comprises a braking piston (200), a friction plate (300), a spacer (400) and a shell (500), wherein the friction plate (300) and the spacer (400) can be pressed by pushing the braking piston (200), the braking mechanism is characterized in that the braking piston (200) comprises a piston body (210), a first connecting part and a first return spring (230), the piston body (210) is installed on the shell (500) through the first connecting part, at least two pushing devices are installed on the braking piston, the pushing devices can push the piston body (210) to move towards one side close to the friction plate (300) and compress the first return spring (230), at least one of the pushing devices is a mechanical pushing device, and at least one of the pushing devices is a hydraulic pushing device.

2. The integrated parking brake and service brake braking mechanism according to claim 1, wherein the mechanical pushing device comprises a brake pull rod (110), a brake cam shaft (120) and a fixed support (130), the fixed support (130) is installed on the housing (500), the brake pull rod (110) and the brake cam shaft (120) are both installed on the fixed support (130), the brake pull rod (110) is fixedly connected with the brake cam shaft (120), one end of the brake cam shaft (120) far away from the brake pull rod (110) is provided with a cam table (121), a piston boss (211) is installed in the piston body (210), and the position of the piston boss (211) is matched with the position of the cam table (121).

3. The parking brake and service brake integrated brake mechanism according to claim 2, wherein the fixing support (130) is mounted on the housing (500) by a second connecting member comprising a connecting block fixedly connected with the fixing support (130), the connecting block being fixedly connected with the housing (500) by a limit bolt (150).

4. The integrated parking and service brake mechanism according to claim 2 or 3, wherein the brake lever (110) is fixedly connected to one end of a second return spring (140), and the other end of the second return spring (140) is connected to a fixed member.

5. The parking brake and service brake integrated brake mechanism according to claim 2 or 3, wherein a pulling member is mounted on the brake lever (110), the pulling member comprises a parking brake lever (600), and a cable (610) is mounted between the parking brake lever (600) and the brake lever (110).

6. The integrated parking brake and service brake mechanism according to claim 1 or 2, wherein the hydraulic pushing means comprises a brake pump (700), the brake pump (700) is connected to an input of a line (780), and an output of the line (780) applies oil pressure to the piston body (210) through a third connecting structure.

7. The integrated parking brake and service brake mechanism according to claim 6, wherein the third connecting structure comprises an oil hole (510) formed in the housing (500), the output end of the pipeline (780) is installed in the oil hole (510), a cavity with variable volume is formed between the housing (500) and the piston body (210), the oil hole (510) is communicated with the cavity, and the cavity is sealed by the first sealing ring (240) and the second sealing ring (250).

8. The integrated parking and service braking brake mechanism according to claim 6, wherein said hydraulic pushing device further comprises a trigger motor (750) and an oil pump (760), said trigger motor (750) is used for controlling the oil pump (760) to pump oil, and the oil pumped by said oil pump (760) is delivered to the brake pump (700) through an oil pipe (770).

9. The parking brake and service brake integrated brake mechanism according to claim 8, wherein the trigger motor (750) controls the oil pump to start upon receiving a trigger signal, wherein the trigger signal is a signal generated upon depressing the brake pedal (710).

10. The parking brake and service brake integrated brake mechanism according to claim 1, wherein the first connecting component is a mounting bolt (220), the mounting bolt comprises a screw portion and a limiting portion, one end of the screw portion is fixedly connected with the limiting portion, the other end of the screw portion penetrates through a through hole formed in the piston body (210) and is fixedly mounted on the housing (500), and the piston body (210) can move along the extending direction of the screw portion and is limited by the limiting portion.