CN112278002B

CN112278002B - Hand brake pull rod system and vehicle

Info

Publication number: CN112278002B
Application number: CN202011209715.XA
Authority: CN
Inventors: 张孝平; 王玉玺; 姜柏宇; 方素英; 邓玉华; 曾丹
Original assignee: CRRC Chengdu Co Ltd
Current assignee: CRRC Chengdu Co Ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-11-09
Anticipated expiration: 2040-11-03
Also published as: CN112278002A

Abstract

The invention discloses a hand brake pull rod system and a vehicle. The hand brake pull rod system comprises a crank arm and a hand brake chain connected to the crank arm, the crank arm is connected to the positioning shaft in a rotating mode, an elastic piece is connected between the crank arm and the positioning shaft, and the reset force of the elastic piece enables the crank arm to drive the hand brake chain to move along the preset relieving direction. In-process that the hand braking was alleviated, loosen the restraint back of hand braking chain, the elastic component provides the power that resets for the hand braking chain, and the elastic component pulling hand braking chain is along predetermineeing the direction motion of alleviating, and after the elastic component reverted to the original state of non-deformation, the hand braking chain was alleviated promptly and is in place, can improve the automatic of hand braking chain in the braking process of alleviating and reset, can effectively avoid the hand braking to alleviate the inefficacy.

Description

Hand brake pull rod system and vehicle

Technical Field

The invention relates to the technical field of brake systems, in particular to a hand brake pull rod system and a vehicle.

Background

Passenger train vehicles all are provided with hand braking device in order to prevent the vehicle from strolling when parkking. The hand braking device needs a chain to transmit braking force, when hand braking is carried out, the chain is tensioned, and braking is carried out after force transmission; when carrying out the hand braking and alleviating, because the whole non-rigidity of chain, the chain can't reset when causing to alleviate, continues reverse winding on the hand brake, causes the secondary braking and alleviates the inefficacy, when the vehicle normally drags, makes wheel pair brake lining or brake disc hug closely wheel or brake disc to take place the incident, cause great potential safety hazards such as wheel or brake disc scotch.

Therefore, how to effectively avoid the failure of the hand brake release is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, the present invention provides a hand brake lever system, which can effectively avoid the failure of hand brake release. Another object of the present invention is to provide a vehicle including the above hand brake lever system, which can effectively avoid the failure of hand brake release.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a hand braking pull rod system, include the turning arm with connect in the hand braking chain of turning arm, the turning arm rotates to be connected in the location epaxially, the turning arm with be connected with the elastic component between the location axle, the restoring force of elastic component makes the turning arm drives the hand braking chain is along predetermineeing the direction of alleviating and remove.

Preferably, a crank arm sleeve is fixed at one end of the crank arm, a middle through hole of the crank arm sleeve is sleeved outside the positioning shaft, and the elastic piece is arranged in the crank arm sleeve.

Preferably, the elastic part is a torsion spring sleeved on the positioning shaft, and two ends of the torsion spring are respectively fixed on the positioning shaft and the crank arm sleeve.

Preferably, the positioning shaft comprises a first shaft section and a second shaft section fixedly connected with the first shaft section to form a stepped shaft, a first step surface formed between the first shaft section and the second shaft section faces to one side where the first shaft section is located, a shaft positioning hole is formed in the first step surface, the torsion spring is sleeved on the first shaft section, and the first free end of the torsion spring is inserted into the shaft positioning hole.

Preferably, the positioning shaft further comprises a third shaft section forming a stepped shaft with the second shaft section, the first shaft section and the third shaft section are respectively arranged on two axial sides of the second shaft section, and a second stepped surface facing one side where the first shaft section is located is formed between the second shaft section and the third shaft section; the crank arm sleeve is sleeved on the positioning shaft from the free end of the first shaft section until the crank arm sleeve abuts against the second step surface.

Preferably, a lock nut is fixed on the first shaft section through threads, so that the crank arm sleeve is clamped between the lock nut and the third shaft section.

Preferably, the inner wall of one axial end of the crank arm sleeve is provided with an axially through end plate, the end plate is provided with a sleeve positioning hole in an axial penetrating manner, the end plate is sleeved outside the positioning shaft, and the second free end of the torsion spring is inserted into the sleeve positioning hole.

Preferably, a first shaft sleeve is detachably connected inside the end plate, so that the first shaft sleeve is rotatably connected to the positioning shaft.

Preferably, in the free state, the two ends of the torsion spring are 180 ° apart.

A vehicle comprising a hand brake lever system as described above.

The hand brake pull rod system comprises a crank arm and a hand brake chain connected to the crank arm, wherein the crank arm is rotatably connected to a positioning shaft, an elastic piece is connected between the crank arm and the positioning shaft, and the reset force of the elastic piece enables the crank arm to drive the hand brake chain to move along a preset relieving direction.

In the process of hand braking, the hand braking chain moves along a preset braking direction, the crank arm is pulled to rotate around the positioning shaft, and the elastic piece is elastically deformed to store elastic potential energy; in-process that the hand braking was alleviated, loosen the restraint back of hand braking chain, the elastic component provides the power that resets for the hand braking chain, and the elastic component pulling hand braking chain is along predetermineeing the direction motion of alleviating, and after the elastic component reverted to the original state of non-deformation, the hand braking chain was alleviated promptly and is in place, can improve the automatic of hand braking chain in the braking process of alleviating and reset, can effectively avoid the hand braking to alleviate the inefficacy.

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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a cross-sectional view of a crank arm socket in a hand brake lever system provided by the present invention;

fig. 2 is a schematic structural diagram of the hand brake lever system provided in the present invention.

Reference numerals:

a lock nut 1;

a gasket 2;

torsion spring 3, first free end 31, second free end 32;

the crank arm sleeve 4, the end plate 41, the first shaft sleeve 42, the second shaft sleeve 43 and the sleeve positioning hole 44;

the positioning shaft 5, the first shaft section 51, the second shaft section 52, the third shaft section 53, the first step surface 54, the second step surface 55, the shaft positioning hole 56;

brake cylinder 6, brake lever 61, balance lever 62;

a hand brake chain 7, a hand brake sprocket 71;

an end wall 8;

crank arm 9, first pull rod 91 and second pull rod 92.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide a hand brake pull rod system which can effectively avoid the hand brake release failure. Another core of the present invention is to provide a vehicle including the above hand brake lever system, which can effectively avoid the failure of hand brake release.

The hand braking pull rod system provided by the invention is particularly applied to railway passenger cars. Referring to fig. 1 and 2, the hand brake lever system includes a crank arm 9 and a hand brake chain 7 connected to the crank arm 9, the crank arm 9 is rotatably connected to a positioning shaft 5, and the positioning shaft 5 is connected to a vehicle body. An elastic piece is connected between the crank arm 9 and the positioning shaft 5, and the reset force of the elastic piece enables the crank arm 9 to drive the hand brake chain 7 to move along the preset release movement direction.

In the process of hand braking, the hand braking chain 7 moves along the preset braking direction, the crank arm 9 is pulled to rotate around the positioning shaft 5, and the elastic piece is elastically deformed to store elastic potential energy. In-process that the hand braking was alleviated, loosen the restraint of hand braking chain 7 after, the elastic component provides supplementary restoring force for hand braking chain 7, and the elastic component pulling hand braking chain 7 is along predetermineeing the direction motion of alleviating to straighten hand braking chain 7, after the elastic component reverted the undistorted original state, hand braking chain 7 was the braking and is alleviated the target in place promptly, can improve the automation of hand braking chain 7 in the braking process of alleviating and reset, can effectively avoid hand braking to alleviate the inefficacy.

Furthermore, a crank arm sleeve 4 is fixed at one end of the crank arm 9, and a middle through hole of the crank arm sleeve 4 is sleeved outside the positioning shaft 5 so as to rotate around the positioning shaft 5. The elastic member is disposed in the crank arm sleeve 4. Through add connecting lever sleeve 4 on connecting lever 9 in order to hold the elastic component, need not to change other structures of connecting lever 9, can directly carry out simple improvement on the basis of current connecting lever 9, do not influence the normal installation of connecting lever on current passenger train. The other end of the crank arm 9 is connected to the hand brake chain 7 via a first pull rod 91, and the middle of the crank arm 9 is connected to the brake cylinder 6 via a second pull rod 92.

Furthermore, the elastic element is a torsion spring 3 sleeved on the positioning shaft 5, and two ends of the torsion spring 3 are respectively fixed on the positioning shaft 5 and the crank arm sleeve 4, so that the assembly is facilitated. Of course, in other embodiments, the elastic member may also be a spring.

Further, as shown in fig. 1, the positioning shaft 5 includes a first shaft section 51 and a second shaft section 52 fixedly connected with the first shaft section 51 to form a stepped shaft. A first step surface 54 formed between the first shaft segment 51 and the second shaft segment 52 faces a side of the first shaft segment 51. The first step surface 54 is provided with a shaft positioning hole 56, the torsion spring 3 is sleeved on the first shaft section 51, and the first free end 31 of the torsion spring 3 is inserted into the shaft positioning hole 56. By arranging the shaft positioning hole 56 on the first step surface 54 of the positioning shaft 5, the first free end 31 of the torsion spring 3 can be directly inserted into the shaft positioning hole 56 in the process of sleeving the torsion spring 3 on the first shaft section 51 along the axial direction, so that the torsion spring 3 can be further conveniently assembled.

Further, the positioning shaft 5 further includes a third shaft section 53 forming a stepped shaft with the second shaft section 52, the first shaft section 51 and the third shaft section 53 are respectively disposed at two axial sides of the second shaft section 52, and a second stepped surface 55 facing the side where the first shaft section 51 is located is formed between the second shaft section 52 and the third shaft section 53. In the assembling process, the crank arm sleeve 4 is sleeved from the free end of the first shaft section 51 to the positioning shaft 5 until the crank arm sleeve 4 abuts against the second step surface 55. The limiting function of the second step surface 55 can play a role in positioning the crank arm sleeve 4 on the positioning shaft 5, and convenience is brought to the assembly of the crank arm sleeve 4.

Further, a lock nut 1 is fixed on the first shaft section 51 through threads, so that the crank arm sleeve 4 is clamped between the lock nut 1 and the third shaft section 53, and the crank arm sleeve 4 is axially positioned. Through the setting of lock nut 1, can realize turning arm sleeve 4 and fix a position the epaxial detachable connection of 5. Additionally, a washer 2 may be provided between the lock nut and the crank sleeve 4.

Further, an end plate 41 axially penetrating is arranged on an inner wall of one end of the crank arm sleeve 4 in the axial direction, a sleeve positioning hole 44 axially penetrates through the end plate 41, the end plate 41 is sleeved outside the positioning shaft 5, and the second free end 32 of the torsion spring 3 is inserted into the sleeve positioning hole 44. In the assembling process, the torsion spring 3 is firstly installed on the positioning shaft 5 and then sleeved with the crank arm sleeve 4, and the sleeve positioning hole 44 is a through hole which is through along the axial direction, so that the position of the torsion spring 3 can be conveniently observed, and the second free end 32 of the torsion spring 3 can be accurately inserted into the sleeve positioning hole 44.

Further, a first bushing 42 is detachably connected to the inside of the end plate 41 to be rotatably connected to the positioning shaft 5 through the first bushing 42. Specifically, the first bush 42 is press-fitted onto the positioning shaft 5 using a nut. The detachable connection of the first shaft sleeve 42 and the crank arm sleeve 4 can facilitate the installation of the crank arm sleeve 4 on the positioning shaft 5. Specifically, the first sleeve 42 is rotatably sleeved on the first shaft section 51. In addition, a second shaft sleeve 43 is integrally disposed on an end of the crank arm sleeve 4 away from the end plate 41 in the axial direction so as to be rotatably connected to the positioning shaft 5, specifically, the second shaft section 52. The first bushing 42 is coaxially disposed with the second bushing 43.

Further, in the free state, the two ends of the torsion spring 3 are separated by 180 °, so that the maximum elastic force which can be provided by the torsion spring 3 can be ensured, and the range in which the torsion spring 3 can provide the torsion force is increased.

In addition to the above hand brake lever system, the present invention further provides a vehicle, which may be a railway passenger car, and the vehicle includes the hand brake lever system, which may be the hand brake lever system provided in any of the above embodiments. For the structure of other parts of the vehicle, please refer to the prior art, and the description is omitted here.

It will be understood that when an element is referred to as being "secured" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The hand brake lever system and the vehicle provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The hand braking pull rod system is characterized by comprising a connecting lever (9) and a hand braking chain (7) connected to the connecting lever (9), wherein the connecting lever (9) is connected to a positioning shaft (5) in a rotating manner, an elastic piece is connected between the connecting lever (9) and the positioning shaft (5), the resetting force of the elastic piece enables the connecting lever (9) to drive the hand braking chain (7) to move along the preset relieving direction, a connecting lever sleeve (4) is fixed at one end of the connecting lever (9), a middle through hole of the connecting lever sleeve (4) is sleeved on the outer side of the positioning shaft (5), the elastic piece is arranged in the connecting lever sleeve (4), the elastic piece is sleeved on a torsion spring (3) on the positioning shaft (5), two ends of the torsion spring (3) are respectively fixed on the positioning shaft (5) and the connecting lever sleeve (4), the positioning shaft (5) comprises a first shaft section (51) and a second shaft section (52) fixedly connected with the first shaft section (51) to form a stepped shaft, a first stepped surface (54) formed between the first shaft section (51) and the second shaft section (52) faces to one side where the first shaft section (51) is located, a shaft positioning hole (56) is formed in the first stepped surface (54), and the torsion spring (3) is sleeved on the first shaft section (51) and a first free end (31) of the torsion spring (3) is inserted into the shaft positioning hole (56).

2. The hand brake lever system according to claim 1, wherein the positioning shaft (5) further comprises a third shaft section (53) forming a stepped shaft with the second shaft section (52), the first shaft section (51) and the third shaft section (53) are respectively disposed at two sides of the second shaft section (52) in the axial direction, and a second stepped surface (55) facing the side of the first shaft section (51) is formed between the second shaft section (52) and the third shaft section (53); the crank arm sleeve (4) is sleeved on the positioning shaft (5) from the free end of the first shaft section (51) until the crank arm sleeve (4) abuts against the second step surface (55).

3. The hand brake lever system of claim 2, wherein a lock nut (1) is threadedly secured to the first shaft section (51) such that the crank arm sleeve (4) is sandwiched between the lock nut (1) and the third shaft section (53).

4. The hand brake lever system according to any one of claims 1 to 3, wherein an end plate (41) axially penetrates through an inner wall of one end of the crank arm sleeve (4) in the axial direction, a sleeve positioning hole (44) axially penetrates through the end plate (41), the end plate (41) is sleeved outside the positioning shaft (5), and the second free end (32) of the torsion spring (3) is inserted into the sleeve positioning hole (44).

5. The hand brake lever system of claim 4, wherein a first boss (42) is removably attached inside the end plate (41) for rotational attachment to the positioning shaft (5) via the first boss (42).

6. The hand brake lever system of any of claims 1 to 3, wherein the ends of the torsion spring (3) are 180 ° apart in the free state.

7. A vehicle comprising a hand brake lever system according to any one of claims 1 to 6.