CN210769934U

CN210769934U - Piston type spring brake air chamber with automatic loading parking brake

Info

Publication number: CN210769934U
Application number: CN201921157835.2U
Authority: CN
Inventors: 盛中林; 王雪群
Original assignee: JIAXING SHENGDING MACHINERY CO Ltd
Current assignee: JIAXING SHENGDING MACHINERY CO Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-06-16
Anticipated expiration: 2029-07-22

Abstract

The utility model discloses a piston spring brake air chamber with automatic loading parking brake, including front cover, midbody and back cover, back cover and midbody form the parking chamber, are provided with piston part and piston rod in the parking chamber, and the piston rod is the cavity formula, is provided with the breather valve in the piston rod, is provided with automatic combination mechanism between piston rod and the piston part, the piston rod is provided with the set of relieving towards back cover one end, the set of relieving includes sliding part, relieving part and connecting portion, and the sliding part stretches into the piston rod and is connected with the piston rod sliding, connecting portion connection relieving part and sliding part, relieving part is towards piston part one side and protrusion in connecting portion, the back cover is seted up and is provided with the opening corresponding sliding part department, is provided with the plug screw, the utility model discloses save the release bolt, when transporting, the pole that does not have protrusion in the back cover, and powerful spring is in the non-compression state simultaneously, and the opening on the back cover can be set to be smaller in size, so that the screw plug can be conveniently detached and sealed.

Description

Piston type spring brake air chamber with automatic loading parking brake

Technical Field

The utility model belongs to piston spring brake chamber field, more specifically the piston spring brake chamber with automatic loading parking braking that says so relates to.

Background

The parking brake chamber of the piston spring brake chamber in the prior art is mainly used for releasing the parking brake by introducing compressed air or releasing a bolt to tighten a strong spring. In order to facilitate installation and debugging, the release bolt is generally used for tensioning the strong spring during material supply, and after the installation and the adjustment are completed, the release bolt is manually dismounted, so that the parking brake is controlled by charging and discharging the parking brake cavity. Most of the release bolts are exposed outside when the conventional brake chamber structure is used for supplying materials, the rigidity of the release bolts is poor, the release bolts are easy to damage, the packaging and transportation cost is increased, meanwhile, the strong spring is always in a compressed state before loading, the output force is seriously reduced, and the service life is influenced.

The Chinese patent with the application number of 2016206538775 discloses a piston type spring brake cylinder, which comprises a cylinder body, wherein the cylinder body comprises a spring cavity, a traveling cavity and a parking cavity, and a brake spring is arranged in the spring cavity; a piston is arranged between the spring cavity and the traveling cavity, and the brake spring is connected with the piston; an intermediate shell is arranged between the travelling cavity and the parking cavity; the middle shell is provided with a parking cavity air inlet and a driving cavity air inlet; the cylinder body in be equipped with piston rod, diaphragm and jar internal breather valve, the piston rod be hollow structure, piston rod one end and piston connection, the other end is connected with the diaphragm, jar internal breather valve be located the piston rod. It has reduced the risk that impurity got into in the cylinder body in the air through setting up of breather valve, has prolonged the practical life of equipment, and built-in breather valve simple structure, easy dismounting simultaneously.

For another example, chinese patent application No. 2008201220545 discloses an internal breathing piston type spring brake chamber; 2017216422125 discloses an over-travel piston spring brake chamber or the like, each of which requires a separate release bolt to retract the piston and hold the power spring in compression during delivery.

The 2019100850009 patent of the applicant, which is named as a double-diaphragm disc type spring brake chamber for automatically loading parking brake, comprises a front cover component, a middle body component and a rear cover component, wherein a push rod disc cavity, a service brake cavity, a parking brake front cavity and a parking brake rear cavity are formed, a tappet component is arranged in the parking brake rear cavity, the tappet component comprises a release disc component, a tappet and a tappet support component, the release disc component is arranged at one end of the tappet and is connected with a rear cavity membrane, and the tappet support component is arranged at the other end of the tappet; the release disc assembly comprises a release disc and a guide sleeve, the release disc is arranged on the guide sleeve, the guide sleeve is sleeved on the tappet, and an automatic combination mechanism is further arranged on the guide sleeve. When the automobile fails and cannot provide compressed air or a rear cavity leather membrane of the brake chamber is damaged, the air is fed by the C cavity to remove the parking brake failure, a separation fork attached to the automobile extends into the opening of the side end face of the rear cover component and penetrates through a through hole in a tappet support seat to push a self-locking sleeve to move left, so that steel balls are separated from a ball groove, the tappet is separated from the self-locking sleeve, the tappet is restored to the state before loading, the manual parking brake removal is realized, and the fault automobile can move conveniently.

But for piston spring brake air chamber, utilize this cover automatic combination mechanism to play the same effect, piston rod in the piston spring brake air chamber is the same with the tappet effect, but has breather valve in the piston rod, and its diameter is far more than the tappet, just makes the diameter from the lock sleeve great, and the axis distance of perforation distance piston rod is far away so and the opening size on the back shroud subassembly is great, and it is comparatively troublesome with the opening dismantlement to block up the part, and leaks gas easily.

SUMMERY OF THE UTILITY MODEL

To prior art not enough, the utility model provides an save release bolt, when the transportation, no protrusion is in the pole of back lid, and powerful spring is in the non-compression state simultaneously, and the opening of covering after and can set up the size less, the screw plug's of being convenient for dismantlement and sealed setting.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a piston spring brake air chamber with automatic loading parking braking, includes protecgulum, well body and hou gai, and back lid and well body form the parking chamber, are provided with piston part and piston rod in the parking chamber, and the piston rod is the cavity formula, is provided with the breather valve in the piston rod, is provided with automatic combination mechanism between piston rod and the piston part, the piston rod is provided with towards back lid one end and removes the cover, remove the cover including sliding part, removal portion and connecting portion, sliding part stretch into in the piston rod with piston rod sliding connection, connecting portion connect removal portion and sliding part, remove portion towards piston part one side and protrusion in connecting portion, it is provided with the opening to have seted up corresponding sliding part department on the back lid, is provided with the plug screw on the opening.

Further, the release portion is annular.

The sliding part is columnar, and a groove is formed in one side of the sliding part facing the rear cover.

A step is arranged at the position, corresponding to the sliding portion, of the piston rod, an outer flange matched with the step is arranged on one side, away from the rear cover, of the sliding portion, and when the outer flange abuts against the step, a moving space is reserved between the connecting portion and the end portion of the piston rod.

The screw plug is further in threaded connection with the rear cover.

Compared with the prior art, the beneficial effects of the utility model are that: the piston rod can be retracted into the parking cavity in the transportation process by arranging the automatic combination mechanism, the rear cover is not provided with a protruding column body, the transportation is convenient, and the automatic combination mechanism can be quickly combined with the piston rod when in normal use, so that the piston component and the piston rod are integrally linked; when breaking down and needing to remove parking braking manually, the plug screw is opened to the accessible, utilizes a polished rod to stretch into the opening and push up hard and remove the cover, makes the sliding part drive and removes portion and remove to the piston part direction, with piston part and piston rod separation, the completion and removes the process, and the open-ended size is less than the diameter of piston rod this moment, can make the polished rod stretch into can, corresponding plug screw is changeed the installation and is dismantled, and changes and realize sealedly.

Drawings

FIG. 1 is a schematic structural view of a piston type spring brake chamber with an automatic loading parking brake of the present invention;

fig. 2 is an enlarged view of a portion C in fig. 1.

Reference numerals: 1. a front cover; 2. a middle body; 3. a rear cover; 4. a strong spring; 5. a piston member; 6. a piston rod; 7. an automatic combining mechanism; 71. a self-locking sleeve; 72. steel balls; 73. a guide sleeve; 74. a spring; 81. a sliding part; 811. an outer flange; 812. a groove; 82. a connecting portion; 83. a releasing section; 9. a plug screw; 10. a breather valve.

Detailed Description

Embodiments of the piston spring brake chamber with an automatically loaded parking brake of the present invention are further described with reference to fig. 1 and 2.

In the description of the present invention, it should be noted that, for the orientation words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and the positional relationship are indicated based on the orientation or the positional relationship shown in the drawings, and the description is only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or the element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and "a plurality" or "a plurality" in the description of the invention means two or more unless a specific definition is explicitly provided.

The piston type spring brake air chamber with the automatic loading parking brake comprises a front cover 1, a middle body 2 and a rear cover 3, wherein the rear cover 3 and the middle body 2 form a parking cavity, a piston component 5 and a piston rod 6 are arranged in the parking cavity, the piston rod 6 is of a hollow type, a breather valve 10 is arranged in the piston rod 6, an automatic combination mechanism 7 is arranged between the piston rod 6 and the piston component 5, a release sleeve is arranged at one end, facing the rear cover 3, of the piston rod 6 and comprises a sliding portion 81, a release portion 83 and a connecting portion 82, the sliding portion 81 extends into the piston rod 6 and is in sliding connection with the piston rod 6, the connecting portion 82 is connected with the release portion 83 and the sliding portion 81, the release portion 83 faces one side of the piston component 5 and protrudes out of the connecting portion 82, an opening is formed in the position, corresponding to the sliding portion 81, of the rear.

The automatic coupling mechanism 7 used in the present embodiment is the same as the prior art, and the automatic coupling mechanism 7 in the double-diaphragm disc spring brake chamber named automatic-loading parking brake, which is previously applied by the applicant with patent number 2019100850009, is used, specifically in the present embodiment: the automatic combination mechanism 7 comprises a self-locking sleeve 71 and a steel ball 72, the self-locking sleeve 71 is sleeved outside a guide sleeve 73, and the guide sleeve 73 is fixed on the piston part 5 and slides outside the piston rod 6; a steel ball 72 mounting hole is formed in the guide sleeve 73, the steel ball 72 is located at the steel ball 72 mounting hole, and an accommodating cavity for accommodating the steel ball 72 is formed in the inner annular wall of the self-locking sleeve 71; one side of the steel ball 72 is in contact with the piston rod 6, and the other side of the steel ball is in contact with the inner wall of the accommodating cavity; the accommodating cavity is a closed end towards one end of the piston part 5, the other end of the accommodating cavity is a communicated opening, the inner wall close to the closed end is of an inclined surface structure, the diameter of the closed end is smaller than that of the opening, a spring 74 is arranged between the guide sleeve 73 and the self-locking sleeve 71, the spring 74 enables the self-locking sleeve 71 to have a tendency of moving towards the direction of the rear cover 3, and a ball groove for accommodating a steel ball 72 is formed in the piston rod 6.

As shown in fig. 1, during transportation, the piston part 5 is at position a, the strong spring 4 is in an unfolded state, the automatic combining mechanism 7 is not combined with the piston rod 6 at this time, the piston rod 6 can fully extend into the parking cavity, and no protruding column is arranged outside the rear cover 3, so that transportation is facilitated, and the influence on the service life of the strong spring 4 is small.

When the parking brake device is required to be used, the parking brake cavity is connected with the compressed air piston component 5 and moves rightwards to the position B, the steel balls 72 fall into the ball grooves of the piston rod 6 at the moment, the piston component 5 is combined with the piston rod 6 through the automatic combination mechanism 7, the piston rod 6, the automatic combination mechanism 7 and the piston component 5 are integrated, and when the piston component 5 moves, the piston rod 6 is linked.

When a fault occurs, the plug screw 9 can be opened by the passing, the plug screw (smooth rod) extends into the opening, the plug screw is abutted against the sliding portion 81, the whole release sleeve is pushed inwards (in the direction of the piston component 5), the self-locking sleeve 71 is abutted against and extruded by the release portion 83, the self-locking sleeve 71 moves leftwards, the steel ball 72 is separated from the ball groove, the piston rod 6 is separated from the self-locking sleeve 71, the piston rod 6 is restored to the state before loading, the whole release sleeve is guided by the piston rod 6 in the process, only one rod is needed, namely the opening in the rear cover 3 can enable the plug screw to extend into the opening, the plug screw 9 is not required to be arranged greatly, the diameter is small, the plug screw 9 and the opening can be assembled and disassembled conveniently, meanwhile, the sealing between the plug screw 9 and the opening is easier to realize sealing, and a sealing ring is preferably arranged between the.

When the piston rod 6 is fully extended into the parking chamber (to the right limit), the release portion 83 is in no contact or no pressure contact with the self-locking sleeve 71.

In the present embodiment, the release portion 83 is preferably annular, and when the self-lock bush 71 is moved leftward, the entire release portion 83 is simultaneously brought into contact with the end face of the self-lock bush 71, so that the force is uniformly applied to each position of the self-lock bush 71, and the self-lock bush 71 can be smoothly moved leftward.

The sliding part 81 of the present embodiment is preferably cylindrical, and a groove 812 is disposed on one side of the sliding part facing the rear cover 3, and the polish rod can extend into the groove 812 to apply a force, so as to support the polish rod.

In the present embodiment, a step is provided at a position of the piston rod 6 corresponding to the sliding portion 81, an outer flange 811 engaged with the step is provided at a side of the sliding portion 81 away from the rear cover 3, and when the outer flange 811 abuts against the step, a moving space is left between the connecting portion 82 and an end portion of the piston rod 6, as shown in fig. 2, by providing the outer flange 811, it is possible to prevent the sliding portion 81 from coming off from the piston rod 6 during the leftward movement of the piston rod 6, and it is ensured that the whole release sleeve can be always combined with the piston rod 6, when the release sleeve needs to be used, the piston rod 6 can guide the release sleeve, and an air hole.

The screw plug 9 and the rear cover 3 are preferably in threaded connection, so that the firmness is high, and the sealing performance is good.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a piston spring brake air chamber with automatic loading parking braking, includes protecgulum, well body and hou gai, back lid and well body formation parking chamber, is provided with piston part and piston rod in the parking chamber, and the piston rod is the cavity formula, is provided with breather valve, its characterized in that in the piston rod: be provided with automatic combination mechanism between piston rod and the piston part, the piston rod is provided with towards hou gai one end and removes the cover, remove the cover and include sliding part, remove portion and connecting portion, sliding part stretch into in the piston rod with piston rod sliding connection, connecting portion connect remove portion and sliding part, remove portion towards piston part one side and protrusion in connecting portion, it is provided with the opening to have seted up corresponding sliding part department on the back lid, is provided with the plug screw on the opening.

2. The piston spring brake chamber with an auto-loaded parking brake of claim 1, wherein: the releasing portion is annular.

3. The piston spring brake chamber with an auto-loaded parking brake of claim 2, wherein: the sliding part is columnar, and a groove is formed in one side, facing the rear cover, of the sliding part.

4. The piston spring brake chamber with an auto-loaded parking brake of claim 3, wherein: the piston rod is provided with a step corresponding to the sliding part, one side, away from the rear cover, of the sliding part is provided with an outer flange matched with the step, and when the outer flange abuts against the step, a moving space is reserved between the connecting part and the end part of the piston rod.

5. The piston spring brake chamber with an auto-loaded parking brake of claim 4, wherein: the screw plug is in threaded connection with the rear cover.