Shoe shaft rotating structure with long service life

Abstract

The utility model discloses a shoe shaft rotating structure with long service life, which belongs to the technical field of brake assemblies, and comprises a pin mechanism and a rotating connecting mechanism, and the rotating connecting mechanism used for reducing the rotating friction force of a shoe is arranged outside the pin mechanism. Through the arrangement of the pin mechanism, the rotary connecting mechanism and the shoe plate mechanism, the traditional rotary friction between the pin rod and the pin sleeve is converted into rolling friction, the frictional resistance of the device is effectively reduced, meanwhile, the lubricating grease containing capacity of the inner space of the device is greatly increased, and the service life of the device is prolonged. The service life of the device is prolonged, the maintenance frequency of the device is reduced, through the arrangement of the end cover mechanism, the oil seal ring and the clamping spring, the rotary connecting mechanism of the device is well protected, lubricating grease of the device can be prevented from leaking, and the service life of the device is prolonged. And meanwhile, the snap spring can prevent the shoe mechanism from moving when the device runs.

Description

TECHNICAL FIELD

[0001] The utility model relates to brake assembly technical field, especially a shoe piece axle rotation structure with long service life. BACKGROUND

[0002] The automobile brake system is a series of special devices for exerting a certain force on some parts (mainly the wheels) of the automobile to forcibly brake them to a certain extent. The existing vehicle brake can be roughly divided into drum brake and disc brake. In the drum brake system, the brake system generates braking force by driving the brake shoe to contact the brake drum, so the brake shoe needs to be rotationally connected to the brake back plate.

[0003] The existing brake shoe is directly rotationally connected to the brake back plate through a brake shoe pin and a pin sleeve. For example, the utility model discloses a shoe piece axle of automobile brake bottom plate, which comprises a main shaft body, a connecting groove, a contact plate and a fixed sliding block. The connecting groove is arranged on both sides of one end of the main shaft body, the contact plate is arranged on one side in the connecting groove, and the outer wall of the fixed sliding block is fixedly connected with the contact plate. When the brake shoe is connected to the inside of the connecting groove, the contact plate is connected between the fixed sliding block and the main shaft body through sliding in the sliding groove, thereby increasing the friction between the brake shoe and the connecting groove, improving the stability of the connection between the brake shoe and the utility model, reducing the influence on the operation of the vehicle brake, and preventing the sliding block from sliding out of the connecting groove. Although the above-mentioned device is not easy to slide out of the connecting groove, it is directly inserted into the connecting groove in actual use, and the rotation of the shoe piece is realized by the relative rotation between the main shaft body and the connecting groove. The rotation friction is large, the wear is large during use, and the device does not have a cavity for accommodating lubricating grease. A small amount of lubricating grease can be filled between the main shaft body and the connecting groove during maintenance, the lubricating grease evaporates and dries quickly, the device needs to be frequently maintained, otherwise the brake will not return to the original position due to excessive friction.

[0004] Therefore, it is urgent to provide a shoe piece axle rotation structure with long service life to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problems of the prior art, and provides a shoe piece axle rotation structure with long service life.

[0006] To solve the above technical problems, one technical scheme of the utility model is: provide a long service life's shoe piece axle rotation structure, including pin mechanism and rotation connection mechanism, its characterized in be: the outside of pin mechanism is provided with the rotation connection mechanism for reducing shoe piece rotation friction, and the outside of rotation connection mechanism is provided with the shoe piece mechanism for generating braking force;

[0007] Both ends of the shoe piece mechanism are provided with end cover mechanisms for protecting the rotation connection mechanism.

[0008] The outer wall of the pin mechanism is provided with two clamping springs for limiting the pin mechanism.

[0009] The utility model further sets up: the pin mechanism includes pin rod body, and two clamping grooves are formed in the pin rod body, and the pin rod body is of alloy structural steel material.

[0010] Through the above technical scheme, the clamping groove can be clamped into the clamping spring, thereby limiting the rotation connection mechanism, the shoe piece mechanism and the end cover mechanism, avoiding the movement thereof, and the pin rod body of alloy structural steel material can effectively improve the strength, hardness and wear resistance of the device, thereby improving the service life of the device.

[0011] The utility model further sets up: one end of the pin rod body is provided with a pin hole, and the other end of the pin rod body is provided with a chamfered portion.

[0012] Through the above technical scheme, the chamfered portion reduces the diameter of one end of the pin rod body, thereby facilitating the insertion of the pin rod body into the rotation connection mechanism during installation.

[0013] The utility model further sets up: the rotation connection mechanism includes a rotating sleeve arranged outside the pin rod body, a plurality of columnar grooves are formed in the inner wall of the rotating sleeve, and rollers are arranged in the columnar grooves.

[0014] Through the above technical scheme, when the vehicle brakes and the shoe piece mechanism rotates, the pin rod body rotates in the rotating sleeve, and the pin rod body does not directly contact the rotating sleeve but contacts the rollers. When the pin rod body rotates, the rollers convert sliding friction into rolling friction, greatly reducing the rotation resistance of the device, thereby reducing the rotation wear of the device and further improving the service life of the device.

[0015] The utility model further sets up: the shoe piece mechanism includes a connecting sleeve arranged outside the rotating sleeve, and a shoe body is integrally fixed to the outside of the connecting sleeve, and at least two annular cavities are formed in the inner wall of the connecting sleeve.

[0016] Through the technical scheme, an annular interlayer is formed between the connecting sleeve and the pin rod body, the interlayer can accommodate not only the rotating connection mechanism but also a large amount of lubricating grease, and the annular cavity in the inner wall of the connecting sleeve further increases the lubricating grease accommodating capacity of the device. Since the lubricating grease accommodating capacity of the device is large, the device can be filled with lubricating grease and does not need to be maintained for a long time, thereby greatly reducing the maintenance frequency of the device.

[0017] The end cover mechanism further comprises annular cover bodies sleeved at two ends of the connecting sleeve, and annular grooves are formed in inner walls of the annular cover bodies.

[0018] Through the technical scheme, the annular cover bodies are made of stainless steel, which can effectively protect the rotating connection mechanism between the connecting sleeve and the roller, avoid external impurities such as dust from entering the rotating connection mechanism, and affect the smoothness of the rotating connection mechanism. The oil seal ring can prevent the lubricating grease from leaking and keep the connecting sleeve and the roller relatively sealed, thereby effectively reducing the evaporation rate of the lubricating grease.

[0019] The oil seal ring is made of rubber, and the cross section of the oil seal ring is L-shaped.

[0020] Through the technical scheme, one side of the oil seal ring is blocked by the connecting sleeve, and the other side is blocked by the annular cover body, thereby effectively preventing the oil seal ring from falling off. When the oil seal ring needs to be replaced, the user can remove the annular cover body and replace the oil seal ring from the inside.

[0021] The beneficial effects of the utility model are as follows:

[0022] 1. The utility model discloses a pin mechanism, a rotating connection mechanism and a shoe mechanism are arranged, the rotating friction between the traditional pin rod and the pin sleeve is converted into rolling friction, the frictional resistance of the device is effectively reduced, the lubricating grease accommodating capacity of the internal space of the device is greatly increased, the service life of the device is improved, and the maintenance frequency of the device is reduced.

[0023] 2. The end cover mechanism, the oil seal ring and the snap spring are arranged, the rotating connection mechanism of the device is well protected, the lubricating grease of the device is prevented from leaking, and the snap spring can prevent the shoe mechanism from moving when the device is running. DRAWINGS

[0024] Figure 1 It is a perspective view of the utility model;

[0025] Figure 2 It is a partial structure view of the pin mechanism and the snap spring of the utility model;

[0026] Figure 3 It is the partial structure diagram of the pin mechanism and the rotary connecting mechanism of the utility model;

[0027] Figure 4 It is the partial structure diagram of the shoe piece mechanism of the utility model;

[0028] Figure 5 It is the partial structure diagram of the annular cover body and the oil seal ring of the utility model;

[0029] Figure 6 It is the partial structure diagram of the annular cover body and the annular groove of the utility model;

[0030] Figure 7 It is the partial structure diagram of the oil seal ring of the utility model.

[0031] In the drawing: 1, pin mechanism;101, pin rod body;102, clamping groove;103, pin hole;104, chamfer part;2, rotary connecting mechanism;201, rotary sleeve;202, cylindrical groove;203, roller;3, shoe piece mechanism;301, connecting sleeve;302, shoe piece body;303, annular cavity;4, end cover mechanism;401, annular cover body;402, annular groove;403, oil seal ring;5, clamping spring. DETAILED DESCRIPTION

[0032] The preferred embodiments of the utility model are described in detail below in combination with the drawings, so that the advantages and features of the utility model can be more easily understood by the person skilled in the art, and the protection scope of the utility model is more clearly and explicitly defined.

[0033] Please refer to Figures 1-4 A shoe piece shaft rotary structure with long service life, comprising a pin mechanism 1 and a rotary connecting mechanism 2, the pin mechanism 1 comprises a pin rod body 101, two clamping grooves 102 are formed on the pin rod body 101, the pin rod body 101 is made of alloy structural steel material, a pin hole 103 is formed at one end of the pin rod body 101, a chamfer part 104 is arranged at the other end of the pin rod body 101, the clamping groove 102 can be clamped into a clamping spring 5, thereby limiting the rotary connecting mechanism 2, the shoe piece mechanism 3 and the end cover mechanism 4 from moving, and at the same time, the pin rod body 101 made of alloy structural steel material can effectively improve the strength, hardness and wear resistance of the device, thereby improving the service life of the device, and the chamfer part 104 reduces the diameter of one end of the pin rod body 101, thereby facilitating the insertion of the pin rod body 101 into the rotary connecting mechanism 2 during installation.

[0034] As Figure 3As shown, the outer part of the pin mechanism 1 is provided with a rotating connection mechanism 2 for reducing the rotating friction of the shoe, the rotating connection mechanism 2 comprises a rotating sleeve 201 arranged outside the pin body 101, the inner wall of the rotating sleeve 201 is provided with a plurality of cylindrical grooves 202, the inside of the cylindrical groove 202 is provided with a roller 203, when the vehicle brakes, the shoe mechanism 3 rotates, the pin body 101 rotates in the rotating sleeve 201, the pin body 101 does not directly contact with the rotating sleeve 201, but contacts with the roller 203, when the pin body 101 rotates, the roller 203 converts sliding friction into rolling friction, greatly reducing the rotating resistance of the device, thereby reducing the rotating wear of the device, thereby further improving the service life of the device.

[0035] As shown in Figures 1-4 , the outer part of the rotating connection mechanism 2 is provided with a shoe mechanism 3 for generating braking force, the shoe mechanism 3 comprises a connecting sleeve 301 arranged outside the rotating sleeve 201, the outer part of the connecting sleeve 301 is integrally fixed with a shoe body 302, the inner wall of the connecting sleeve 301 is provided with at least two annular cavities 303, the connecting sleeve 301 and the pin body 101 form an annular interlayer, which can not only accommodate the rotating connection mechanism 2, but also accommodate a large amount of lubricating grease, the annular cavities 303 of the inner wall of the connecting sleeve 301 further improve the lubricating grease accommodating capacity of the device, because the lubricating grease capacity of the device is large, the device can be filled with lubricating grease for a long time without the need for maintenance, greatly reducing the maintenance frequency of the device.

[0036] As shown in Figure 1 , Figure 5 , and Figure 6 , both ends of the shoe mechanism 3 are provided with an end cover mechanism 4 for protecting the rotating connection mechanism 2, the end cover mechanism 4 comprises an annular cover body 401 sleeved on both ends of the connecting sleeve 301, the inner wall of the annular cover body 401 is provided with an annular groove 402, the inside of the annular groove 402 is provided with an oil seal ring 403, the oil seal ring 403 is made of rubber, the cross section of the oil seal ring 403 is L-shaped, the annular cover body 401 is made of stainless steel, which can effectively protect the rotating connection mechanism 2 between the connecting sleeve 301 and the roller 203, prevent dust and other external impurities from entering the rotating connection mechanism 2, and affect the smoothness of the rotating connection mechanism 2, the oil seal ring 403 can prevent the leakage of lubricating grease and keep the connecting sleeve 301 and the roller 203 relatively sealed, effectively reducing the evaporation rate of the lubricating grease, one side of the oil seal ring 403 is blocked by the connecting sleeve 301, and the other side is blocked by the annular cover body 401, thereby effectively preventing the oil seal ring 403 from falling off, when the oil seal ring 403 needs to be replaced, the user can remove the annular cover body 401 and take out the oil seal ring 403 from the inside for replacement.

[0037] The utility model discloses when using, pin rod body 101 can be fixed with the brake backboard through the pin hole 103, when the vehicle brake, brake system promotes the shoe piece body 302 to rotate with pin rod body 101 as the axle and contacts the brake drum, produces the friction and thus makes the vehicle brake, in this process, the rotating connection mechanism 2 can effectively reduce the rotating friction of shoe piece body 302, thereby reducing the wear and tear of pin rod body 101 and shoe piece body 302, the cavity between connecting sleeve 301 and pin rod body 101 can also accommodate a large amount of lubricating grease, effectively reducing the maintenance frequency of the device, the snap spring 5 is fixed in the clamping groove 102, can be positioned to rotating connection mechanism 2 and shoe piece body 302, avoid rotating connection mechanism 2 and shoe piece body 302 to occur the shift, when maintaining, the user can dismantle the snap spring 5 through the blocking ring pliers.

[0038] The above-mentioned is only the embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation using the utility model specification and the attached drawing contents, or direct or indirect application in other related technical fields, are all included in the patent protection range of the utility model.

Claims

1. A long service life shoe axle rotation structure comprising a pin mechanism (1) and a rotation connection mechanism (2), characterized in that: The outer part of the pin mechanism (1) is provided with a rotating connection mechanism (2) for reducing the rotating friction of the shoe, and the outer part of the rotating connection mechanism (2) is provided with a shoe mechanism (3) for generating braking force. Both ends of the shoe mechanism (3) are provided with end cover mechanisms (4) for protecting the rotating connection mechanism (2). The outer wall of the pin mechanism (1) is provided with two clamping springs (5) for limiting the pin mechanism (1).

2. The long service life shoe piece shaft rotation structure according to claim 1, characterized in that: The pin mechanism (1) comprises a pin rod body (101), and two clamping grooves (102) are formed in the pin rod body (101), and the pin rod body (101) is made of alloy structural steel.

3. The long service life shoe piece shaft rotation structure according to claim 2, characterized in that: One end of the pin rod body (101) is provided with a pin hole (103), and the other end of the pin rod body (101) is provided with a chamfered portion (104).

4. The long service life shoe piece shaft rotation structure according to claim 2, characterized in that: The rotating connection mechanism (2) comprises a rotating sleeve (201) arranged outside the pin rod body (101), and a plurality of columnar grooves (202) are formed in the inner wall of the rotating sleeve (201), and a plurality of rollers (203) are arranged in the columnar grooves (202).

5. The long service life shoe piece shaft rotation structure according to claim 4, characterized in that: The shoe mechanism (3) comprises a connecting sleeve (301) arranged outside the rotating sleeve (201), and a shoe body (302) is integrally fixed outside the connecting sleeve (301), and at least two annular cavities (303) are formed in the inner wall of the connecting sleeve (301).

6. The long service life shoe piece shaft rotation structure according to claim 5, characterized in that: The end cover mechanism (4) comprises an annular cover body (401) sleeved on both ends of the connecting sleeve (301), and an annular groove (402) is formed in the inner wall of the annular cover body (401), and an oil seal ring (403) is arranged in the annular groove (402).

7. The long service life shoe piece shaft rotation structure according to claim 6, characterized in that: The oil seal ring (403) is made of rubber, and the cross section of the oil seal ring (403) is L-shaped.

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