阅读说明：本技术 一种终端制动装置 (Terminal braking device ) 是由 韩百萍 樊秋波 于 2021-09-30 设计创作，主要内容包括：本发明公开了一种终端制动装置,属于机械设备制动技术领域。本发明包括终端基座、制动鼓、第一制动蹄块、第二制动蹄块、蹄块支架、旋转驱动源和楔块杆；蹄块支架安装于终端基座上；第一制动蹄块和第二制动蹄块对称设置；两制动蹄块同侧的一端均为转动端,其同侧的另一端均为受力端；两制动蹄块的转动端分别通过转轴结构可旋转设置于蹄块支架上；楔块杆穿过蹄块支架的通孔且能够转动,其一端设有扩距结构,且位于两制动蹄块的受力端之间的空隙处,其另一端连接于旋转驱动源上；两制动蹄块均位于制动鼓的内侧,且均设有冷却介质流动通道。本发明具有外部循环冷却且不具有旋转密封构造,能广泛应用于工业设备、移动设备的制动领域。(The invention discloses a terminal braking device, and belongs to the technical field of mechanical equipment braking. The invention comprises a terminal base, a brake drum, a first brake shoe, a second brake shoe, a shoe bracket, a rotary driving source and a wedge rod; the shoe block bracket is arranged on the terminal base; the first brake shoe and the second brake shoe are symmetrically arranged; one end of each brake shoe on the same side is a rotating end, and the other end of each brake shoe on the same side is a stressed end; the rotating ends of the two brake shoe blocks are respectively and rotatably arranged on the shoe block bracket through a rotating shaft structure; the wedge rod penetrates through the through hole of the shoe support and can rotate, one end of the wedge rod is provided with a distance expanding structure and is positioned in a gap between the stress ends of the two brake shoes, and the other end of the wedge rod is connected to the rotary driving source; the two brake shoes are both positioned on the inner side of the brake drum and are both provided with cooling medium flow channels. The invention has external circulation cooling and no rotary sealing structure, and can be widely applied to the braking field of industrial equipment and mobile equipment.)

1. An end stop device, comprising: the brake device comprises a terminal base (1), a brake drum (2), a first brake shoe (3 a), a second brake shoe (3 b), a shoe support (4), a rotary driving source (5) and a wedge rod (6);

the shoe block bracket (4) is arranged on the terminal base (1);

the first brake shoe block (3 a) and the second brake shoe block (3 b) are symmetrically arranged; one end of the first brake shoe (3 a) and one end of the second brake shoe (3 b) on the same side are both rotating ends, and the other end on the same side is a stressed end;

the rotating ends of the first brake shoe (3 a) and the second brake shoe (3 b) are respectively rotatably arranged on the shoe support (4) through rotating shaft structures;

the wedge rod (6) penetrates through a through hole of the shoe block bracket (4) and can rotate; one end of the wedge rod (6) is provided with a distance expanding structure and is positioned in a gap between the stress ends of the first brake shoe (3 a) and the second brake shoe (3 b); the other end of the wedge rod (6) is connected to the rotary driving source (5);

the first brake shoe (3 a) and the second brake shoe (3 b) are both located inside the brake drum (2);

and cooling medium flow channels are arranged in the first brake shoe (3 a) and the second brake shoe (3 b).

2. The end-stop device according to claim 1, wherein: the power part of the rotary drive source (5) is driven by fluid pressure; the rotary drive source (5) is equipped with an adjustment handle and a proportional valve (7).

3. The end-stop device according to claim 1, wherein: and the cooling medium flow channel of the first brake shoe (3 a) or the second brake shoe (3 b) is formed by a hollow cavity and a fluid inlet and outlet hole.

4. The end-stop device according to claim 1, wherein: the cooling medium flow channel of the first brake shoe block (3 a) or the second brake shoe block (3 b) is composed of a plurality of protruding heat dissipation rib flow channels (3 b-4) and fluid inlet and outlet holes.

5. The end stop according to claim 4, wherein: the radiating rib flow channels (3 b-4) are provided with tree-shaped radiating structures.

6. The end-stop device according to claim 1, wherein: and the fluid inlet and outlet hole of the first brake shoe (3 a) or the second brake shoe (3 b) is connected with the cooling pipeline in a threaded or flange pressing block manner, and the sealing form is static sealing.

7. The end-stop device according to claim 1, wherein: and a friction layer (10) is arranged on the end surface of the first brake shoe (3 a) or the second brake shoe (3 b) which is in contact with the brake drum (2).

8. The end-stop device according to claim 1, wherein: and a friction layer (10) is arranged on the inner side wall of the brake drum (2) which is in contact with the first brake shoe block (3 a) and the second brake shoe block (3 b).

9. An end stop according to claim 7 or 8, characterised in that: the friction layers (10) are fixedly connected in a sintering or riveting mode.

10. The end-stop device according to claim 1, wherein: also comprises a dust cover (9); the dustproof cover (9) is installed on the terminal base (1) and covers the shoe block support (4).

Technical Field

The invention relates to the technical field of mechanical equipment braking, in particular to a terminal braking device.

Background

In the field of industrial equipment and mobile equipment, continuous braking of certain rotating machinery is often required. For example, when a transport person or equipment goes into a well, a mine hoist needs to be braked and decelerated continuously to ensure that the speed is not over-speed and out of control. For example, in heavy-duty mobile equipment, working in a high-speed heavy-duty working condition or a heavy-duty downhill working condition, continuous braking deceleration of an axle is also required. For this purpose, braking devices are usually installed on the installation. Currently, brake devices are largely classified into dry (drum) brake devices and wet brake devices.

The drum brake device mainly comprises the following components: a rotating brake drum and brake shoes. Energy is consumed through friction between the brake shoe and the brake drum and is converted into heat energy, and the purpose of braking is achieved. The device has simple and reliable structure and low cost, and is widely applied to the brake system of medium and heavy equipment, such as the brake system of a truck. However, under some extreme conditions, the generated huge heat cannot be dissipated in time, which causes high-temperature failure and accelerated loss of friction parts.

Therefore, wet brake devices are widely used in heavy industrial equipment or mobile equipment. The device comprises the stack in turn of the rotatory rotor of multiunit and static stator, and rotor and stator are all put and are placed in the closed shell, and the rotation axis passes from the casing center, are full of cooling liquid in the casing, must try out 2 sets of rotary seal spare between axle and the casing in order to seal cooling liquid. Pressure is applied to the superposed moving plate and the superposed static plate, the purpose of braking is achieved through a friction heating mode, and cooling liquid can be configured with external circulating cooling to take away heat. The device has numerous parts, complex structure and high cost. The 2 sets of rotary sealing elements are easy to leak oil, poor in reliability and complex in maintenance process.

Therefore, how to further improve the structure of the braking device has been a great research direction in the industry.

Disclosure of Invention

In order to solve the problems mentioned in the background art, the invention provides a terminal brake device, which comprises a terminal base, a brake drum, a first brake shoe, a second brake shoe, a shoe support, a rotary drive source and a wedge rod, wherein the brake drum is arranged on the terminal base;

the shoe block bracket is arranged on the terminal base;

the first brake shoe and the second brake shoe are symmetrically arranged; one end of the first brake shoe block, which is on the same side with the second brake shoe block, is a rotating end, and the other end of the first brake shoe block, which is on the same side with the second brake shoe block, is a stressed end;

the rotating ends of the first brake shoe and the second brake shoe are respectively rotatably arranged on the shoe support through a rotating shaft structure;

the wedge rod penetrates through the through hole of the shoe block bracket and can rotate; one end of the wedge block rod is provided with a distance expanding structure and is positioned in a gap between the stress ends of the first brake shoe and the second brake shoe; the other end of the wedge rod is connected to the rotary driving source;

the first brake shoe and the second brake shoe are both located on the inner side of the brake drum;

and cooling medium flow channels are arranged in the first brake shoe and the second brake shoe.

In carrying out the above embodiment, further, the power member of the rotary drive source is driven by fluid pressure; the rotary drive source is equipped with an adjustment handle and a proportional valve.

In the above embodiment, further, the cooling medium flow channel of the first brake shoe or the second brake shoe is formed by a hollow cavity and a fluid inlet and outlet hole.

When the above embodiment is implemented, further, the cooling medium flow channel of the first brake shoe or the second brake shoe is formed by a plurality of protruding heat dissipation rib flow channels and fluid inlet and outlet holes.

In the above embodiment, further, the heat dissipation rib flow channel is provided with a tree-shaped radiation structure.

When the embodiment is implemented, further, the fluid inlet and outlet hole of the first brake shoe or the second brake shoe is connected with the cooling pipeline by a screw thread or a flange pressing block, and the sealing form is static sealing.

When the above embodiment is implemented, further, a friction layer is provided on an end surface of the first brake shoe or the second brake shoe, which is in contact with the brake drum.

When the above embodiment is implemented, further, the brake drum is provided with a friction layer on an inner side wall contacting the first brake shoe and the second brake shoe.

In the above embodiment, the friction layer is further fixedly connected by sintering or riveting.

When the embodiment is implemented, the dust-proof cover is further included; the dustproof cover is installed on the terminal base and covers the shoe block support.

Compared with the prior art, the invention comprehensively considers the advantages and the disadvantages of the existing drum brake device and the existing wet brake device, invents the terminal brake device which has simple structure and reliable use, has external circulation cooling, does not have a rotary sealing structure, has excellent performance, and can be widely applied to the braking field of industrial equipment and mobile equipment, in particular to the braking field of heavy equipment.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of an end stop according to the present invention;

FIG. 2 is a schematic auxiliary view after the brake drum and the dust cap are hidden;

FIG. 3 is a schematic bottom view of the brake drum assembled with the brake shoe;

FIG. 4 is a schematic top view of the brake drum and brake shoe assembly

FIG. 5 is a schematic structural view of an embodiment of a second brake shoe;

FIG. 6 is a schematic view of an embodiment of a second brake shoe having heat sink rib flow channels;

FIG. 7 is a cross-sectional view of a friction plate in a brake shoe;

FIG. 8 is a cross-sectional view of the friction plate configuration on a brake drum.

The attached drawings are as follows:

1. a terminal base; 2. a brake drum; 3a, a first brake shoe; 3a-1, a first cooling fluid inlet; 3a-2, a first cooling fluid outlet; 3a-3, a first pin shaft hole; 3b, a second brake shoe; 3b-1, a second cooling fluid inlet; 3b-2, a second cooling fluid outlet; 3b-3, a second pin shaft hole; 3b-4, heat dissipation rib flow channels; 4. a shoe block support; 4a, a first pin shaft; 4b, a second pin shaft; 5. a rotary drive source; 6. a wedge rod; 7. a proportional valve; 8. a pipeline; 9. a dust cover; 10. and (4) a friction layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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 invention provides a terminal braking device which comprises a terminal base 1, a brake drum 2, a first brake shoe 3a, a second brake shoe 3b, a shoe support 4, a rotary driving source 5 and a wedge rod 6, wherein the first brake shoe and the second brake shoe are connected through a connecting rod;

the shoe block bracket 4 is arranged on the terminal base 1;

the first brake shoe 3a and the second brake shoe 3b are symmetrically arranged; one end of the first brake shoe 3a, which is on the same side as the second brake shoe 3b, is a rotating end, and the other end of the first brake shoe, which is on the same side, is a stressed end;

the rotating ends of the first brake shoe 3a and the second brake shoe 3b are respectively rotatably arranged on the shoe support 4 through a rotating shaft structure;

the wedge rod 6 penetrates through a through hole of the shoe block bracket 4 and can rotate; one end of the wedge rod 6 is provided with a distance expanding structure and is positioned in a gap between the stress ends of the first brake shoe 3a and the second brake shoe 3 b; the other end of the wedge rod 6 is connected to the rotary driving source 5;

the first brake shoe 3a and the second brake shoe 3b are both located inside the brake drum 2;

cooling medium flow channels are arranged inside the first brake shoe 3a and the second brake shoe 3 b.

In specific implementation, as shown in fig. 1 to 4, the terminal base 1 is a structural element, and other components all use the terminal base 1 as a mounting carrier;

a mounting hole is formed in the middle of the shoe block bracket 4 and is used for being connected with a boss of the terminal base 1;

a first pin shaft hole 3a-3 is formed in the rotating end of the first brake shoe 3a, a first pin shaft 4a is arranged at the corresponding position of the shoe support 4, and the first brake shoe 3a is installed on the shoe support 4 through the matching of the first pin shaft hole 3a-3 and the first pin shaft 4a and can rotate around the first pin shaft 4 a;

a second pin shaft hole 3b-3 is formed in the rotating end of the second brake shoe 3b, a second pin shaft 4b is arranged at the corresponding position of the shoe support 4, and the second brake shoe 3b is installed on the shoe support 4 through the matching of the second pin shaft hole 3b-3 and the second pin shaft 4b and can rotate around the second pin shaft 4 b;

a through hole is formed in one side of the shoe support 4 corresponding to the stress ends of the first brake shoe 3a and the second brake shoe 3b, the wedge rod 6 penetrates through the through hole, the diameter of the through hole is larger than that of the wedge rod 6, one end of the wedge rod 6 is arranged into a spiral end to form a distance expanding structure, the spiral end is located in a gap between the stress ends of the first brake shoe 3a and the second brake shoe 3b, and when the wedge rod 6 rotates, the spiral end can push the stress ends of the first brake shoe 3a and the second brake shoe 3b outwards to drive the first brake shoe 3a and the second brake shoe 3b to rotate outwards to rub against the inner side wall of the brake drum 2;

the wedge rod 6 is driven to rotate by the rotary driving source 5;

cooling medium flow channels are further arranged inside the first brake shoe 3a and the second brake shoe 3b, so that cooling medium is input into the cooling medium flow channels to form a cooling circulation loop, and heat generated by friction between the first brake shoe 3a and the brake drum 2 and the second brake shoe 3b can be effectively taken away.

The working method comprises the following steps: an operator pushes the wedge rod 6 to rotate through the rotary driving source 5, the spiral end head of the wedge rod 6 separates the first brake shoe 3a and the second brake shoe 3b, the shoes and the brake drum 2 are pressed tightly, friction braking force is generated, heat is generated through friction, and the purpose of energy consumption is achieved.

In the above process, the cooling fluid flows inside the first brake shoe 3a and the second brake shoe 3b, and a cooling effect is achieved.

When braking needs to be finished, an operator pulls the wedge rod 6 to rotate reversely through the rotary driving source 5, so that the first brake shoe 3a, the second brake shoe 3b and the brake drum 2 are in a free state, and braking force is not provided any more.

In carrying out the above embodiment, further, the power unit of the rotary drive source 5 is driven by fluid pressure; the rotary drive source 5 is equipped with an adjustment handle and a proportional valve 7.

In specific implementation, the rotary driving source 5 pushes an internal piston to move by the pressure of fluid (gas or liquid), so as to push the wedge rod 6 to rotate; the rotary drive source 5 has an adjustment handle and a two-position three-pass proportional valve 7. When the device is used, an operator controls the proportional valve 7 by adjusting the handle, connects the rotary driving source 5 with the pipeline 8 for the (gas or hydraulic) pressure source, and can provide fluid (gas or liquid) pressure for the rotary driving source 5 according to the proportion of the handle.

The working method comprises the following steps: an operator presses the adjusting handle to control the valve core of the proportional valve 7 to move downwards in the figure 1, and a fluid (gas or liquid) pressure source is communicated with the rotary driving source 5 to provide fluid pressure, so that the wedge rod 6 is pushed to rotate.

In the above process, the deeper the adjustment handle is depressed, the greater the fluid pressure that the proportional valve 7 supplies to the rotation drive source 5, that is, the greater the brake pressure.

When braking needs to be finished, an operator pulls up the adjusting handle to control the valve core of the proportional valve 7 to move upwards in the drawing 1, the rotary driving source 5 is communicated with the atmosphere, the pressure of the fluid is released, and the wedge rod 6 is pulled to rotate reversely.

In the above embodiment, further, the cooling medium flow passage of the first brake shoe 3a or the second brake shoe 3b is formed by a hollow cavity and a fluid inlet and outlet hole.

When the brake shoe is used, a cooling medium flows in from the first cooling fluid inlet 3a-1, enters the hollow cavity and flows out from the first cooling fluid outlet 3 a-2;

the cooling medium flow passage structure of the second brake shoe 3b may also be the same.

Or alternatively, the cooling medium flow channel of the first brake shoe 3a or the second brake shoe 3b is formed by a plurality of protruding heat dissipation rib flow channels 3b-4 and fluid inlet and outlet holes.

Further, the radiating rib flow channels 3b-4 are provided with tree-shaped radiating structures.

In specific implementation, as shown in fig. 6, the second brake shoe 3b has a structure for enhancing heat transfer therein, and the cooling fluid is divided into a plurality of channels by a plurality of heat dissipation rib runners 3b-4, so as to increase the heat dissipation area and improve the heat dissipation effect; the cooling fluid enters from the second cooling fluid inlet 3b-1 and flows out from the second cooling fluid outlet 3b-2 after being cooled. The fin flow channels 3b-4 may have a tree-like radial structure with more heat transfer area.

The cooling medium flow passage of the first brake shoe 3a may also be the same.

When the above embodiment is implemented, further, the fluid inlet and outlet hole of the first brake shoe 3a or the second brake shoe 3b is connected with the cooling pipeline by a screw thread or a flange press block, and the sealing form is static sealing.

In specific implementation, for example, the cooling pipeline and the second cooling fluid inlet 3b-1 and the second cooling fluid outlet 3b-2 of the second brake shoe 3b are connected by a screw thread or a flange pressing block, the sealing mode is static sealing, and the sealing element is a rubber O-ring or is sealed by the bevel angle of a metal surface. The same structure can be adopted for the first brake shoe 3 a.

In the embodiment, a friction layer 10 is further provided on an end surface of the first brake shoe 3a or the second brake shoe 3b that contacts the brake drum 2.

In specific implementation, as shown in fig. 7, the friction material may be attached to the first brake shoe 3a or the second brake shoe 3b by sintering or riveting to form a friction layer 10, and the friction layer 10 is in contact with the brake drum 2.

Alternatively, as shown in fig. 8, the brake drum 2 is optionally provided with a friction layer 10 on an inner side wall contacting the first brake shoe 3a and the second brake shoe 3 b.

When the friction layer 10 is riveted with the brake shoe, the surface of the head of the rivet is lower than the friction layer 10; when the friction layer 10 is riveted to the brake drum 2, the rivet head surface is lower than the friction layer 10.

In the implementation of the above embodiment, further, the dust cover 9 is further included; the dust cover 9 is installed on the terminal base 1 and covers the shoe block support 4.

In specific implementation, as shown in fig. 1, the dust cap 9 is fixedly connected with the terminal base 1; the dust cover 9 is provided with a plurality of abdicating holes, and the first cooling fluid inlet 3a-1, the first cooling fluid outlet 3a-2, the second cooling fluid inlet 3b-1, the second cooling fluid outlet 3b-2 and the wedge rod 6 can pass through the abdicating holes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.