Torsion-Type Emergency and Parking Brake

Abstract

The present invention discloses a torsion type emergency brake and parking brake, which comprises a support frame, friction plates and a brake drum. Both ends of the friction plates have protrusions. An annular top iron is installed on the support frame and near the protrusions of the friction plates. A camshaft is embedded in the side part of the top iron. The contact part of the camshaft and the side part of the top iron has a top cam and a body cam. The other end of the camshaft is connected to a rotary power source through a rocker arm. In the present invention, the top cam and the body cam on the camshaft rotate, and simultaneously and powerfully drive the top iron synchronously, so that the top iron rigidly pushes the protrusions of all the friction plates upward to generate frictional braking with the brake drum, thereby realizing emergency braking and parking braking simultaneously. Moreover, it is beneficial to reduce the installation space and improve the working efficiency of safety braking.

Description

Technical Field

[0001] The invention relates to a vehicle braking system, in particular to a brake. Background Art

[0002] At present, the vehicle safety brake mainly solves the functions of driving emergency braking, fault monitoring, automatic cooling, cleaning and dust removal. To realize parking braking, another set of parking brake devices needs to be installed in its corresponding position, which occupies the limited space in the vehicle. There is a lack of a device that combines the functions of driving emergency braking and parking braking, which affects the working efficiency of safety braking. Summary of the invention

[0003] The object of the present invention is to overcome the above-mentioned disadvantages and to provide a torsion emergency brake and parking brake which can integrate driving emergency brake and parking brake.

[0004] The objective of the present invention is achieved through the following technical scheme: a torsional emergency brake and parking brake, comprising a support frame, a friction plate, and a brake drum, wherein both ends of the friction plate have protrusions, an annular top iron is installed on the support frame and close to the protrusions of the friction plate, a camshaft is embedded in the side of the top iron, and the camshaft has a top cam and a body cam at the contact portion with the side of the top iron, and the other end of the camshaft is connected to a rotary power source through a rocker arm.

[0005] As an embodiment of the present invention, the top iron is two semicircular rings butted against each other, the butt joint of the top iron is retracted by a tension spring, and the camshaft is embedded in the butt joint of the top iron. The butt joint of the top iron has a groove, and the top cam and the body cam on the camshaft are correspondingly embedded in the groove.

[0006] As another embodiment of the present invention, the protrusions at both ends of the friction plate are provided with inserts, the outer side of the top iron is provided with a plurality of convex teeth, a solid block is provided on the support frame and between the inserts and the convex teeth, two hook teeth close to each other are provided on the inner side of the top iron, and the top cam and the body cam on the camshaft are embedded between the two hook teeth.

[0007] After adopting the present invention, the rotating power source drives the rocker arm to rotate the top cam and the body cam on the camshaft, and at the same time, the top iron is driven with strong force, so that the top iron pushes the protrusions of all friction plates upward with its rigidity to produce friction braking with the brake drum, thereby realizing emergency braking and parking braking at the same time. It is also beneficial to reduce the installation space, can make good use of the space, is easy to install, improves the efficiency of power output, and improves the working efficiency of safe braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation modes.

[0009] Figure 1 This is a schematic structural diagram of the torsion - type emergency brake and parking brake of the present invention.

[0010] Figure 2 It is Figure 1 a connection diagram of the camshaft, rocker arm, power output rod and brake cylinder in

[0011] Figure 3 This is a schematic structural diagram of another embodiment (the top iron is formed in a gear shape) of the present invention.

[0012] Figure 4 It is Figure 1 a schematic structural diagram of the friction plate in

[0013] Figure 5 It is Figure 3 a schematic installation structure diagram of the friction plate and inserts in Detailed implementation manners

[0014] As Figure 1 , Figure 2 , Figure 4 can be seen, the torsion - type emergency brake and parking brake of the present invention includes a support frame 13, friction plates 12 (several pieces), and a brake drum 23. Both ends of the friction plate 12 have protrusions 20 (in a protruding shape, see Figure 4 ). An annular top iron 1 is installed on the support frame 13 and near the protrusions of the friction plate. A camshaft 31 is embedded in the side of the top iron 1. The contact part of the camshaft 31 with the side of the top iron has a top cam 40 and a body cam 34. The other end of the camshaft 31 is connected to a rotary power source 18 through a rocker arm 32.

[0015] As an embodiment of the present invention, the top iron 1 is composed of two semi-circular arc rings butt-jointed with each other (arranged left and right or up and down, and can be a chain structure to form a complete circular arc ring). The butt-jointed part of the top iron 1 is retracted by a tension spring 5 (the other butt-jointed part of the top iron is arc-shaped and has a positioning pin hole 3 for fitting and installing with the frame positioning pin on the support frame). The camshaft 31 is embedded in the butt-jointed part of the top iron 1. The butt-jointed part of the top iron 1 has a groove 35, and the top cam 40 and the body cam 34 on the camshaft are respectively embedded in this groove 35. The outer shapes of the top cam 40 and the body cam 34 on the camshaft correspond to and are embedded in the groove 35. The top iron 1 and the tension spring 5 are each provided with a set at the front and rear positions of the support frame 13 and are respectively close to the protrusions 20 at both ends of the friction plate. The rotary power source 18 is a brake cylinder, and the brake cylinder is connected to the rocker arm 32 through a power output rod 33. The brake cylinder is installed on the vehicle axle through a cylinder support 30. The brake cylinder includes a piston 28, a strong spring 22, a piston rod 19, etc. The brake cylinder has an air inlet 24, and the piston rod penetrates through the cylinder support. The power output rod 33 is located between the two piston rods.

[0016] The working principle of the present invention is as follows: When the brake cylinder (with strong spring energy storage) is not working, compressed air compresses the strong spring 22, and the brake cylinder is in a standby working state; the two ends of the semi-circular arc-shaped top irons on the left and right are retracted by the tension spring 5. The top cam 40 and the body cam 34 on the camshaft 31 respectively cooperate and butt-joint with the grooves 35 at the butt-jointed ends of the two sets of semi-circular arc-shaped top irons, and are in a standby working contact state.

[0017] When the brake cylinder works, its air inlet 24 cuts off the compressed air, releases the elastic force of the strong spring 22, causes the brake cylinder to press down, and the power output rod 33 pushes the rocker arm 32, causing the camshaft 31 to twist. The top cam 40 and the body cam 34 on the camshaft 31 rotate in the grooves 35 at the butt-jointed part of the top iron and push open the semi-circular arc-shaped top irons 1 on the left and right, and overcome the pulling force of the tension springs 5 at both ends of the top iron 1. The top iron 1 is jacked up with its positioning pin hole 3 and the frame positioning pin as the fulcrum, so that the top iron rigidly pushes all the protrusions 20 of the friction plates upward to generate frictional braking with the brake drum 23, thereby realizing emergency braking and parking braking simultaneously.

[0018] As another embodiment of the present invention, as Figure 3 、 Figure 5As shown, inserts 36 (triangular shape) are installed on the protrusions 20 at both ends of the friction plate. A number of convex teeth 37 are provided on the outer side of the top iron 1 (making the overall shape of the top iron into a gear shape). A fixing block 38 is installed on the support frame 13 and between the insert 36 and the convex teeth 37 (relatively speaking, the insert 36 can also be between the convex teeth 37 and the fixing block 38). Two hook teeth 39 close to each other are installed on the inner side of the top iron 1 (one set for the front and rear positions respectively). The top cam 40 and the body cam 34 on the camshaft are correspondingly embedded between the two hook teeth. The outer shapes of the top cam 40 and the body cam 34 on the camshaft correspond to and are embedded between the hook teeth.

[0019] The top cam 40 and the body cam 34 on the camshaft 31 are correspondingly embedded and docked between the hook teeth 39 on the inner sides of the two sets of top irons, being in a state of waiting for working contact. When the brake wheel cylinder works, its air inlet 24 cuts off the compressed air, releases the elastic force of the strong spring 22, causes the brake wheel cylinder to press down, and the power output rod 33 pushes the rocker arm 32, causing the camshaft 31 to twist. The top cam 40 and the body cam 34 on the camshaft rotate to push the hook teeth 39, driving the top iron and its convex teeth 37 to move. Then, the convex teeth push the insert 36 to move and collide with and squeeze the fixing block 38 on the support frame, causing the insert to move along the inclined surface of the fixing block, pushing the protrusion of the friction plate 12 upward to generate frictional braking with the brake drum 23. Thus, emergency braking (realized by another service braking power mechanism, which is a well-known technology) and parking braking can be achieved simultaneously.

[0020] The present invention is mainly applied to the automotive braking system. When the brake wheel cylinder is inflated, the parking brake is released, and when the air is cut off, power output is realized to achieve parking braking. Similarly, it can also be applied to mechanical industries such as machining and robotics.

Claims

1. Torsional emergency brake and parking brake, including a support frame, friction plates, and a brake drum, It is characterized in that: Both ends of the friction plate have protrusions. An annular top iron is installed on the support frame and near the protrusions of the friction plate. A camshaft is embedded in the side of the top iron. The contact part of the camshaft with the side of the top iron has a top cam and a body cam. The other end of the camshaft is connected to a rotary power source through a rocker arm; Inserts are installed on the protrusions at both ends of the friction plate. The outer side of the top iron has several convex teeth. A fixing block is installed on the support frame and between the inserts and the convex teeth. Two hook teeth close to each other are installed on the inner side of the top iron. The top cam and the body cam on the camshaft are embedded between the two hook teeth.

2. The torsional emergency brake and parking brake according to claim 1, It is characterized in that: The rotary power source is a brake slave cylinder, and the brake slave cylinder is connected to the rocker arm through a power output rod.

3. The torsional emergency brake and parking brake according to claim 1 or 2, It is characterized in that: The top iron is two semi-circular annular pieces butt-jointed with each other. The butting part of the top iron is pulled and retracted by a tension spring, and the camshaft is embedded in the butting part of the top iron.

4. The torsional emergency brake and parking brake according to claim 3, It is characterized in that: The butting part of the top iron has a groove, and the top cam and the body cam on the camshaft are embedded in this groove.

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