Hydraulic wheel edge brake

Abstract

The application discloses a hydraulic wheel edge brake and belongs to the technical field of crane braking systems, which comprises a mounting base, a hydraulic cylinder, brake arms and brake blocks, the brake arms are provided with two and are rotationally installed on the mounting base, the brake blocks are provided with two and are respectively installed on the two brake arms, the hydraulic cylinder is located between the two brake arms, and the rotation points of the brake arms and the mounting base are located between the brake blocks and the hydraulic cylinder; the cylinder body of the hydraulic cylinder is rotationally installed on one brake arm, the piston of the hydraulic cylinder is fixedly installed with an adjusting screw rod, the adjusting screw rod is provided through and slidingly matched with the other brake arm, the adjusting screw rod is threadedly matched with at least two adjusting nuts, and the other brake arm is located between the two adjusting nuts. The application has the effect of realizing the adjustment of the clamping force of the two brake blocks on the brake wheel, thereby guaranteeing the clamping stability of the brake wheel during the pressure relief braking of the hydraulic cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of crane braking system, in particular to a hydraulic wheel edge brake. BACKGROUND

[0002] In the crane operation, the hydraulic wheel edge brake plays a crucial role, the main reason lies in the crane operation has the particularity of large load, complex working condition, high safety requirement, the hydraulic wheel edge brake needs to accurately and reliably control the parking and movement of the crane.

[0003] The hydraulic wheel edge brake is mainly used for braking the brake wheel to ensure the parking stability of the crane. The existing hydraulic wheel edge brake mainly includes a base, a hydraulic cylinder and two brake pads, the hydraulic cylinder is installed on the base and is used to drive the two brake pads to move towards each other or away from each other, and the device mainly realizes the fixation or non-fixation of the brake wheel by clamping or not clamping the brake wheel by the two brake pads during use.

[0004] Although the clamping fixation of the brake wheel can be realized by driving the two brake pads by the hydraulic cylinder, the size of the clamping force of the brake wheel by the hydraulic cylinder driving the two brake pads is difficult to adjust, thereby it is inconvenient to ensure the clamping stability of the brake wheel when the hydraulic cylinder is de-energized. SUMMARY

[0005] In order to realize the adjustment of the clamping force size of the brake wheel by the two brake pads, and to ensure the clamping stability of the brake wheel when the hydraulic cylinder is de-energized, the present application provides a hydraulic wheel edge brake.

[0006] The present application provides a hydraulic wheel edge brake, which adopts the following technical scheme:

[0007] A hydraulic wheel edge brake, comprising a mounting base, a hydraulic cylinder, a brake arm and a brake pad, the brake arm is provided with two and is rotatably installed on the mounting base, the brake pad is provided with two and is respectively installed on the two brake arms, the hydraulic cylinder is located between the two brake arms, and the rotation point of the brake arm and the mounting base is located between the brake pad and the hydraulic cylinder; the cylinder body of the hydraulic cylinder is rotatably installed on one of the brake arms, the piston of the hydraulic cylinder is fixedly installed with an adjusting screw rod, the adjusting screw rod is provided through and slidingly fitted on the other brake arm, the adjusting screw rod is threadedly fitted with at least two adjusting nuts, and the other brake arm is located between the two adjusting nuts.

[0008] By adopting the technical scheme, in normal state, the hydraulic cylinder drives the piston to move outward to the maximum stroke, so that the two brake blocks are in the closest state to realize the clamping and fixing of the brake wheel; when the hydraulic cylinder drives the piston to contract, the two brake arms away from the hydraulic cylinder move in the direction of moving away from each other, so that the two brake blocks are released from the clamping and fixing of the brake wheel, that is, the brake of the brake wheel is released; by adjusting the positions of the adjusting nuts, the other brake arm is fixed at different length positions of the adjusting screw rod, so that the clamping force of the two brake blocks on the brake wheel in normal state can be adjusted, thereby fully ensuring the clamping stability of the brake wheel when the hydraulic cylinder is depressurized and braked in different situations.

[0009] Optionally, the hydraulic cylinder comprises a cylinder body, a reset disc spring and a piston, the piston comprises a plug body connecting portion, a first sliding portion and a second sliding portion, the plug body connecting portion is provided through and slidingly fitted in the cylinder body, and the adjusting screw rod is connected to the plug body connecting portion; the first sliding portion is fixedly installed at one end of the plug body connecting portion away from the adjusting screw rod, and is slidingly fitted in the cylinder body; the second sliding portion is fixedly installed at one end of the first sliding portion away from the plug body connecting portion, the cross-sectional dimension of the second sliding portion is smaller than that of the first sliding portion, the reset disc spring is sleeved outside the second sliding portion and applies an elastic force to the first sliding portion in the direction away from the second sliding portion; the cylinder body is provided with an oil inlet, the oil inlet is located at one side of the first sliding portion away from the second sliding portion, the cylinder body is provided at the top with a valve block, the interface of the valve block is connected to the oil inlet through a pipeline, and the valve block is integrally provided with a normally closed electromagnetic valve.

[0010] By adopting the technical scheme, when the crane starts to work, the hydraulic station is pressed, that is, oil is filled into the cylinder body through the oil inlet to open the two brake arms of the brake, at this time, the normally closed electromagnetic valve is in a closed state, the normally closed electromagnetic valve is used to realize long-time pressure by taking advantage of the weak internal leakage characteristics, cooperating with the sealing of the cylinder inlet and the high-precision inner surface processing of the cylinder, so that the brake is continuously opened; when the crane stops working, the control room is powered on (short-time power-on is enough), the normally closed electromagnetic valve is opened, the cylinder is depressurized to make the two brake arms close to perform the brake action.

[0011] In addition, the valve block material can be selected as an alloy material considering high strength and oil corrosion resistance to ensure structural strength and sealing performance, and the valve block is installed close to the brake, which is beneficial to reduce the number of oil way interfaces, reduce the risk of oil way bending and leakage, and build a simple and reliable oil way channel.

[0012] The normally closed electromagnetic valve can be a manually reset normally closed electromagnetic valve, so that in case of power failure and other emergencies, the oil way can be opened through the manual switch on each brake valve block to force the brake to depressurize, as an emergency brake supplement, and at the same time, after power-on or fault removal, the valve is manually reopened to avoid the potential risk of automatic recovery of the passage.

[0013] Optionally, the cylinder body comprises a cylinder body, a front cover and a rear cover, the front cover is installed at one end of the cylinder body, the rear cover is installed at the end of the cylinder body away from the front cover, the plug body connecting part is threaded and slidingly fitted in the front cover, the rear cover is provided with a sliding groove at one end of the cylinder body, the second sliding part is slidingly fitted in the sliding groove, and the oil inlet is arranged on the front cover.

[0014] By adopting the above technical scheme, the cooperation of the second sliding part and the sliding groove further limits the movement of the piston, which is beneficial to further ensure the stability of the sliding of the piston in the cylinder body. The oil inlet arranged on the front cover facilitates the machining of the oil inlet and ensures the sealing of the cylinder body.

[0015] Optionally, the mounting base is provided with two connecting pins, one end of each of the two connecting pins is threadedly fitted in the mounting base, and the two connecting pins are respectively threaded and rotationally fitted in the two brake arms. The outer circumferential surface of the end of each of the two connecting pins away from the threaded end is provided with a limiting clamping groove. The mounting base is provided with two limiting clamping plates corresponding to the two connecting pins. Each of the two limiting clamping plates is located in a limiting clamping groove and is fixedly installed on the mounting base by a bolt.

[0016] By adopting the above technical scheme, the limiting clamping plate and the limiting clamping groove limit the axial direction of the connecting pin, which is beneficial to fully ensure the stability of the position of the connecting pin, and further facilitates the stable rotation of the brake arm around the connecting pin.

[0017] Optionally, the brake block is rotationally installed at one end of the brake arm. The mounting base is provided with a brake elastic element for moving the brake block towards the mounting base. The two brake blocks are provided with a buffer pad on the side close to each other.

[0018] By adopting the above technical scheme, the buffer pad is beneficial to reduce the rigid wear between the brake block and the brake wheel, and ensure the service life of the brake block and the brake wheel. At the same time, the rotationally arranged brake block cooperates with the brake elastic element to facilitate the uniform distribution of the brake force of the buffer pad on the brake wheel.

[0019] Optionally, the two brake blocks are each provided with a mounting plate on the side close to each other by a bolt. The buffer pad is installed on the side of the mounting plate away from the brake block.

[0020] By adopting the above technical scheme, when the buffer pad is worn out after long-term use, the mounting plate can be removed to facilitate the disassembly and replacement of the buffer pad, which is convenient and fast.

[0021] Optionally, the brake block comprises a first brake part and a second brake part, the first brake part is rotationally installed on the brake arm, the brake elastic member is used to drive the first brake part to move towards the installation base, the second brake part is rotationally installed on the first brake part away from the brake arm, the first brake part is provided with a brake rotation assembly used to drive the second brake part to rotate, and the buffer pad is located on the side of the second brake part away from the first brake part.

[0022] By adopting the technical scheme, the brake rotation assembly drives the second brake part to rotate, so that the angle of the buffer pad against the brake wheel is finally adjusted, thereby, after the clamping force of the brake arm on the brake wheel is adjusted, the angle of the second brake part is adjusted synchronously, so that the uniformity of the brake force of the buffer pad on the brake wheel is finally ensured, the wear of the buffer pad caused by excessive local force is reduced, and the service life of the buffer pad is further ensured.

[0023] Optionally, the second brake part is fixedly installed with a rotation protrusion, the first brake part is provided with an arc-shaped limiting groove in an arc shape, and the rotation protrusion is slidably matched with the arc-shaped limiting groove.

[0024] By adopting the technical scheme, the rotation protrusion and the arc-shaped limiting groove are arranged to limit the rotation stroke of the second brake part, so that the second brake part is quickly adjusted within the rotation stroke, and the invalid adjustment amount is reduced.

[0025] Optionally, the brake rotation assembly comprises a brake screw and a brake return spring, the brake screw is threadedly matched with the first brake part, one end of the brake screw is abutted against the rotation protrusion, and the brake return spring is arranged in the arc-shaped limiting groove and used to apply an elastic force to the rotation protrusion to move towards the brake screw.

[0026] By adopting the technical scheme, the rotation protrusion is stably slid in the arc-shaped limiting groove due to the abutment with the brake screw and the elastic force of the brake return spring under the rotation of the brake screw, so that the rotation angle of the second brake part is adjusted in a small amount, and the adjustment is convenient and fast.

[0027] Optionally, the two brake arms are threadedly matched with pressing screws, when the piston of the hydraulic cylinder is in a contraction state, the two pressing screws are respectively arranged in the two brake arms and abut against the two sides of the installation base.

[0028] By adopting the technical scheme, the screwing and pressing screw rod is used to adjust the length of the pressing screw rod penetrating the brake arm, so that the adjustment of the movement stroke of the hydraulic cylinder piston is realized by pressing the mounting base with the pressing screw rod of different lengths, which is beneficial to adjusting the optimal working gap between the brake block and the brake wheel according to different working conditions, avoiding the situation of brake lag caused by locking or too long idle stroke, and having strong applicability.

[0029] In summary, the present application has at least one of the following beneficial technical effects:

[0030] 1. By adjusting the positions of the adjusting nuts, the other brake arm is fixed at different length positions of the adjusting screw rod, so that the adjustment of the clamping force of the two brake blocks on the brake wheel in normal state is realized, thereby facilitating the full guarantee of the clamping stability of the brake wheel during the pressure relief braking of the hydraulic cylinder under different conditions.

[0031] 2. By pressing the mounting base with the pressing screw rod of different lengths, the adjustment of the movement stroke of the hydraulic cylinder piston is realized, which is beneficial to adjusting the optimal working gap between the brake block and the brake wheel according to different working conditions, avoiding the situation of brake lag caused by locking or too long idle stroke, and having strong applicability.

[0032] 3. After adjusting the clamping force of the brake arm on the brake wheel, adjusting the angle of the second brake part is beneficial to finally guaranteeing the uniformity of the distributed braking force of the buffer pad on the brake wheel, reducing the wear of the buffer pad caused by excessive local stress, and further guaranteeing the service life of the buffer pad. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a schematic diagram of the overall structure of embodiment 1 of the present application.

[0034] Figure 2 is a schematic diagram of the partial cross-sectional front view of embodiment 1 of the present application.

[0035] Figure 3 is a schematic diagram of the partial cross-sectional view of the brake block in embodiment 1 of the present application.

[0036] Figure 4 is a schematic diagram of the front view of embodiment 2 of the present application.

[0037] Figure 5 is Figure 4 a partial enlarged schematic diagram of part A.

[0038] Explanation of reference signs:

[0039] 1, mounting base; 101, mounting portion; 102, connecting portion; 2, hydraulic cylinder; 201, cylinder body; 2011, cylinder body; 2012, front cover; 2013, rear cover; 202, reset disc spring; 203, piston; 2031, plug connecting portion; 2032, first sliding portion; 2033, second sliding portion; 3, brake arm; 4, brake block; 5, connecting pin shaft; 6, limiting clamping groove; 7, limiting clamping plate; 8, adjusting screw; 9, adjusting nut; 10, sliding cavity; 11, sliding groove; 12, oil inlet; 121, oil inlet section; 122, oil injection section; 13, valve block; 14, pipeline; 15, brake elastic member; 16, mounting plate; 17, buffer pad; 18, clamping groove; 181, first clamping half groove; 182, second clamping half groove; 19, clamping block; 20, limiting hole; 21, abutting bolt; 22, pressing screw; 23, first brake portion; 24, second brake portion; 25, rotating shaft; 26, rotating protrusion; 27, brake fixing plate; 28, rotating hole; 29, arc-shaped limiting groove; 30, brake screw; 31, brake reset spring; 32, rubber pad. DETAILED DESCRIPTION

[0040] The following will be described in detail below Figures 1-5 The present application is further described in detail.

[0041] The hydraulic wheel edge brake is disclosed.

[0042] Embodiment 1

[0043] Referring to Figure 1 The hydraulic wheel edge brake includes a mounting base 1, a hydraulic cylinder 2, a brake arm 3, and a brake block 4. The longitudinal section of the mounting base 1 is rectangular. In the present embodiment, the length direction of the mounting base 1 is the x-axis direction, and the width direction is the y-axis direction. The brake arm 3 is provided with two brake arms 3, and both are rotationally installed on the mounting base 1. The two brake arms 3 are respectively arranged near the two sides of the mounting base 1 in the length direction, i.e., the x-axis direction.

[0044] Continuing to refer to Figure 1, specifically, the mounting base 1 includes two mounting portions 101 and two connecting portions 102, the two mounting portions 101 are arranged opposite to each other, and the two connecting portions 102 are arranged opposite to each other and fixedly installed on the sides of the two mounting plates 16. The mounting base 1 is provided with two connecting pins 5, which are arranged along the y-axis direction and located on the sides away from the two connecting portions 102, one end of each of the two connecting pins 5 is threadedly connected to one of the two mounting portions 101, and the other end of each of the two connecting pins 5 is arranged through the other mounting portion 101, and the outer circumferential surface of the other mounting portion 101 is provided with a limiting slot 6 arranged in a ring shape. The mounting base 1 is provided with two limiting plates 7, which are arranged in the limiting slots 6, respectively, and each limiting plate 7 is fixedly installed on the other mounting portion 101 by two bolts, so as to limit the axial movement of the connecting pin 5, thereby ensuring the stability of the position of the connecting pin 5, and stably realizing the rotation of the brake arm 3 around the axis of the connecting pin 5.

[0045] Referring to Figure 1 and Figure 2 , the hydraulic cylinder 2 is located on the top of the mounting base 1 and between the two brake arms 3, the cylinder body 201 of the hydraulic cylinder 2 is rotatably installed on one of the brake arms 3 by a rotating shaft arranged along the y-axis direction, the piston 203 of the hydraulic cylinder 2 is fixedly installed with an adjusting screw 8, the adjusting screw 8 is arranged through and slidably connected to the other brake arm 3, in order to facilitate the fixation between the adjusting screw 8 and the other brake arm 3, the adjusting screw 8 is threadedly connected with a plurality of adjusting nuts 9, and the number of the adjusting nuts 9 is three in the embodiment of the application, the other brake arm 3 is located between the two adjusting nuts 9 close to the hydraulic cylinder 2, so that the other brake arm 3 is tightly pressed by the adjusting nuts 9 through the rotation of the adjusting nuts 9, thereby realizing the fixation between the adjusting screw 8 and the other brake arm 3.

[0046] Referring to Figure 2 , specifically, the hydraulic cylinder 2 includes a cylinder body 201, a reset disc spring 202 and a piston 203, wherein the cylinder body 201 includes a cylinder body 2011, a front cover 2012 and a rear cover 2013, the front cover 2012 is installed on one end of the cylinder body 2011 by a bolt, the rear cover 2013 is installed on the end of the cylinder body 2011 away from the front cover 2012 by a bolt, the cylinder body 2011 is provided with a sliding cavity 10 arranged through along the length direction of the cylinder body 2011, and the rear cover 2013 is provided with a sliding groove 11 on the end facing the cylinder body 2011. The piston 203 includes a plug body connecting portion 2031, a first sliding portion 2032 and a second sliding portion 2033, wherein the plug body connecting portion 2031 is arranged through and slidably connected to the front cover 2012, and the adjusting screw 8 is connected to the end of the plug body connecting portion 2031 arranged through the front cover 2012.

[0047] Continuing to refer to Figure 2The first sliding part 2032 is fixedly installed at one end of the plug body connecting part 2031 away from the adjusting screw 8, and is slidingly fitted in the sliding cavity 10. The second sliding part 2033 is fixedly installed at one end of the first sliding part 2032 away from the plug body connecting part 2031, and has a cross-sectional size smaller than that of the first sliding part 2032. The second sliding part 2033 is slidingly fitted in the sliding groove 11 at one end away from the first sliding part 2032, so as to sufficiently ensure the sliding stability of the piston 203 in the cylinder body 201. The reset disc spring 202 is sleeved outside the second sliding part 2033, and is uniformly distributed along the axis of the second sliding part 2033. Each reset disc spring 202 applies a spring force to the first sliding part 2032 in a direction away from the second sliding part 2033, so that the piston 203 is in a position close to the front cover 2012 in a normal state.

[0048] With reference to the foregoing Figure 2 , the front cover 2012 is provided with an oil inlet 12, which includes an oil inlet section 121 and an oil injection section 122. The oil injection section 122 is formed on the side of the front cover 2012 facing the rear cover 2013 and extends along the axis of the cylinder body 201. One end of the oil inlet section 121 is connected to one end of the oil injection section 122 away from the hole thereof and is perpendicular to the oil injection section 122. The oil injection section 122 extends to the top of the front cover 2012. The valve block 13 is fixedly installed on the top of the rear cover 2013. The interface of the valve block 13 is connected to the oil inlet 12 through the pipeline 14. The valve block 13 is integrally provided with a normally closed electromagnetic valve. In the embodiment of the application, the normally closed electromagnetic valve is a manually reset normally closed electromagnetic valve, so as to manually reopen the valve after power-on or fault removal, thereby avoiding the potential risk of automatic recovery of the passage. The interface of the valve block 13 is connected to the oil inlet 12 through the pipeline 14, so that when the crane starts to work, the hydraulic station is pressed, that is, the oil is filled into the cylinder body 201 through the oil inlet 12, so that the two brake arms 3 of the brake are opened.

[0049] With reference to the foregoing Figure 1 and Figure 2 , the brake shoe 4 is provided with two brake arms 3 corresponding to the brake shoe 4. The two brake shoes 4 are respectively rotatably installed at one end of the two brake arms 3 away from the cylinder body 201. The rotation point of the brake arm 3 and the connecting pin shaft 5 of the mounting base 1 is located between the brake shoe 4 and the hydraulic cylinder 2. The mounting base 1 is provided with a brake elastic member 15 for moving the brake shoe 4 towards the mounting base 1. In the embodiment of the application, the brake elastic member 15 is selected as an elastic hook. The elastic hook is provided with two groups of elastic hooks corresponding to the brake shoe 4, each group is provided with two elastic hooks. One end of each group of two elastic hooks is connected to the mounting base 1, and the other end is connected to the brake shoe 4, so as to apply a stable spring force to the brake shoe 4 in a direction close to the mounting base 1.

[0050] With reference to the foregoing Figure 1 and Figure 2, the two brake shoes 4 are fixedly installed with mounting plates 16 on the side close to each other through two bolts distributed along the y-axis direction, the bolts for fixing the mounting plates 16 are located on the side away from each other of the two brake shoes 4, and the two mounting plates 16 are fixedly provided with buffer pads 17 on the side close to each other through embedding or bonding, so as to reduce the rigid wear between the brake shoes 4 and the brake wheel, ensure the service life of the brake shoes 4 and the brake wheel, and facilitate quick replacement and maintenance of the buffer pads 17 by disassembling and assembling the mounting plates 16.

[0051] With reference to Figure 1 and Figure 3 , in order to fully ensure the stability of the relative position between the brake shoe 4 and the mounting plate 16, a first clamping half groove 181 is formed on the side of the brake shoe 4 facing the mounting plate 16, a second clamping half groove 182 corresponding to the first clamping half groove 181 is formed on the side of the mounting plate 16 facing the brake shoe 4, and the first clamping half groove 181 and the second clamping half groove 182 are vertically and throughly arranged. When the mounting plate 16 is fixed with the brake shoe 4, the first clamping half groove 181 and the second clamping half groove 182 are connected to form a clamping groove 18. A clamping block 19 is slidably arranged in the clamping groove 18, two vertically distributed limiting holes 20 are formed on the side of the clamping block 19 facing the brake shoe 4, and two abutting bolts 21 corresponding to the two limiting holes 20 and insertedly arranged in the limiting holes 20 are threadedly arranged on the side of the brake shoe 4 away from the mounting plate 16. By rotating the abutting bolts 21, the abutting bolts 21 are inserted into the limiting holes 20 and abut against the clamping block 19 to stably fix the clamping block 19. The clamping block 19 is arranged to stably limit the brake shoe 4 and the mounting plate 16 in the y-axis direction, which is beneficial to fully ensure the stability of the relative position between the brake shoe 4 and the mounting plate 16. In addition, the abutting bolts 21 inserted into the limiting holes 20 and abutting against the clamping block 19 make the clamping block 19 not easy to be separated from the limiting holes 20.

[0052] With reference to Figure 1 , in addition, the side away from each other of the two brake arms 3 is threadedly arranged with an abutting screw 22, the abutting screw 22 is located between the two mounting portions 101, and when the piston 203 of the hydraulic cylinder 2 is in a contracted state, the two abutting screws 22 are respectively arranged in the two brake arms 3 and abut against the side away from each other of the two connecting portions 102 of the mounting base 1. By adjusting the abutting of the mounting base 1 through the abutting screws 22 with different extension lengths, the movement stroke of the piston 203 of the hydraulic cylinder 2 is adjusted, which is beneficial to adjusting the optimal working gap between the brake shoe 4 and the brake wheel according to different working conditions, and avoiding the situation that the brake is locked or the brake is delayed due to too long idle stroke.

[0053] The implementation principle of the embodiment 1 is that under normal circumstances, the hydraulic cylinder 2 drives the piston 203 to move outward to the maximum stroke, so that the two brake blocks 4 are in the closest state to realize the clamping and fixing of the brake wheel. When the hydraulic cylinder 2 drives the piston 203 to retract, the two brake arms 3 drive the two brake blocks 4 to move away from each other, so that the two brake blocks 4 release the clamping and fixing of the brake wheel, that is, release the brake of the brake wheel. By adjusting the position of each adjusting nut 9, one of the brake arms 3 is fixed at different length positions of the adjusting screw 8, which can realize the adjustment of the clamping force of the two brake blocks 4 on the brake wheel under normal circumstances, so as to fully ensure the clamping stability of the brake wheel when the hydraulic cylinder 2 is depressurized and braked under different circumstances.

[0054] Embodiment 2

[0055] With reference to Figure 4 and Figure 5 , the difference between this embodiment and the embodiment 1 is that the specific structure of the brake block 4 is different. In the embodiment of the application, the brake block 4 specifically comprises a first brake part 23 and a second brake part 24, wherein the first brake part 23 is rotatably installed on the brake arm 3 around the y-axis direction, and each group of two elastic clamps is connected to the mounting base 1 at one end and connected to the first brake part 23 of the brake block 4 at the other end. The second brake part 24 is rotatably installed on the end of the first brake part 23 away from the brake arm 3, and the mounting plate 16 and the buffer pad 17 are arranged on the side of the second brake part 24 away from the first brake part 23. The specific connection mode is the same as that of the embodiment 1, which will not be described here.

[0056] With reference to Figure 5 , specifically, the second brake part 24 is fixedly connected with a rotating shaft 25 arranged along the y-axis direction, and the rotating shaft 25 penetrates the first brake part 23 and is in rotational cooperation with the first brake part 23. The outer circumferential surface of the rotating shaft 25 of the second brake part 24 is fixedly connected with a rotating protrusion 26. The first brake part 23 is fixedly installed with a brake fixing plate 27, and the brake fixing plate 27 is provided with a rotating hole 28 penetrating along the y-axis. The rotating shaft 25 penetrates and rotates in cooperation with the rotating hole 28 of the brake fixing plate 27, and the hole wall of the rotating hole 28 is provided with an arc-shaped limiting slot 29 arranged in an arc shape. The rotating protrusion 26 is in sliding cooperation with the arc-shaped limiting slot 29, so as to limit the rotating stroke of the second brake part 24 through the arc-shaped limiting slot 29, and reduce the invalid adjustment amount.

[0057] With reference to Figure 5The first brake part 23 is provided with a brake rotating assembly for driving the second brake part 24 to rotate, and the brake rotating assembly comprises a brake screw 30 and a brake return spring 31. The brake screw 30 is arranged through and threadedly connected to the brake fixed plate 27 of the first brake part 23. One end of the brake screw 30 is located in the arc-shaped limiting groove 29 and fixedly connected with a rubber pad 32. The rubber pad 32 is in abutment with the rotating protrusion 26, so as to reduce the abrasion caused by rigid friction between the brake screw 30 and the rotating protrusion 26. The brake return spring 31 is arranged in the arc-shaped limiting groove 29. One end of the brake return spring 31 is connected to the groove wall of the arc-shaped limiting groove 29, and the other end is connected to the end of the rotating protrusion 26 away from the brake screw 30. In this way, the brake return spring 31 applies an elastic force to the rotating protrusion 26 to move towards the brake screw 30.

[0058] The implementation principle of the embodiment 2 is the same as that of the embodiment 1, and the main difference is that the rotating protrusion 26 drives the second brake part 24 to rotate by screwing the brake screw 30, so as to facilitate the micro adjustment of the angle of the buffer pad 17 when abutting and fixing the brake wheel, and then facilitate the adjustment of the uniformity of the brake force of the buffer pad 17 on the brake wheel after the adjustment of the clamping force of the brake arm 3 on the brake wheel, so as to reduce the abrasion of the buffer pad 17 caused by excessive local force.

[0059] The above are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. Hydraulic wheel brake, characterized in that: The brake shoe (4) is rotatably installed at one end of the brake arm (3), the mounting base (1) is provided with a brake elastic element (15) for moving the brake shoe (4) towards the mounting base (1), and the sides of the two brake shoes (4) close to each other are provided with a buffer pad (17). The two brake shoes (4) are both fixedly installed with a mounting plate (16) on the side close to each other through a bolt, and the buffer pad (17) is installed on the side of the mounting plate (16) away from the brake shoe (4). The side of the brake shoe (4) towards the mounting plate (16) is provided with a first clamping half slot (181), and the side of the mounting plate (16) towards the brake shoe (4) is provided with a second clamping half slot (182) corresponding to the first clamping half slot (181), both the first clamping half slot (181) and the second clamping half slot (182) are vertically through, when the mounting plate (16) is fixed with the brake shoe (4), the first clamping half slot (181) and the second clamping half slot (182) are communicated to form a clamping slot (18); the clamping slot (18) is slidably fitted with a clamping block (19), the side of the clamping block (19) towards the brake shoe (4) is provided with two vertically distributed limiting holes (20), and the side of the brake shoe (4) away from the mounting plate (16) is threadedly fitted with two abutting bolts (21) corresponding to the two limiting holes (20) and insertedly fitted with the limiting holes (20). The brake shoe (4) includes a first brake part (23) and a second brake part (24), the first brake part (23) is rotatably installed on the brake arm (3), the brake elastic element (15) is used for driving the first brake part (23) to move towards the mounting base (1), the second brake part (24) is rotatably installed at the end of the first brake part (23) away from the brake arm (3), the first brake part (23) is provided with a brake rotating assembly for driving the second brake part (24) to rotate, and the buffer pad (17) is located on the side of the second brake part (24) away from the first brake part (23). ​ The second brake part (24) is fixedly provided with a rotating protrusion (26), and the first brake part (23) is provided with an arc-shaped limiting groove (29) arranged in an arc shape, and the rotating protrusion (26) is slidably matched with the arc-shaped limiting groove (29); The brake rotating assembly comprises a brake screw (30) and a brake return spring (31), the brake screw (30) is threadedly matched with the first brake part (23), one end of the brake screw (30) abuts against the rotating protrusion (26), and the brake return spring (31) is arranged in the arc-shaped limiting groove (29) and is used for applying an elastic force to the rotating protrusion (26) to move towards the brake screw (30).

2. The hydraulic wheel brake according to claim 1, characterized in that: The hydraulic cylinder (2) comprises a cylinder body (201), a reset disc spring (202) and a piston (203), the piston (203) comprises a plug body connecting part (2031), a first sliding part (2032) and a second sliding part (2033), the plug body connecting part (2031) penetrates and is slidably matched with the cylinder body (201), and the adjusting screw (8) is connected to the plug body connecting part (2031); the first sliding part (2032) is fixedly mounted at one end of the plug body connecting part (2031) away from the adjusting screw (8) and is slidably matched with the cylinder body (201); the second sliding part (2033) is fixedly mounted at one end of the first sliding part (2032) away from the plug body connecting part (2031), the cross-sectional dimension of the second sliding part (2033) is smaller than that of the first sliding part (2032), the reset disc spring (202) is sleeved outside the second sliding part (2033) and applies an elastic force to the first sliding part (2032) to move away from the second sliding part (2033); the cylinder body (201) is provided with an oil inlet (12), the oil inlet (12) is located on one side of the first sliding part (2032) away from the second sliding part (2033), the cylinder body (201) is provided with a valve block (13) at the top, an interface of the valve block (13) is communicated with the oil inlet (12) through a pipeline (14), and the valve block (13) is integrally provided with a normally closed electromagnetic valve.

3. The hydraulic wheel brake according to claim 2, characterized in that: The cylinder body (201) comprises a cylinder body (2011), a front cover (2012) and a rear cover (2013), the front cover (2012) is mounted at one end of the cylinder body (2011), the rear cover (2013) is mounted at one end of the cylinder body (2011) away from the front cover (2012), the plug body connecting part (2031) penetrates and is slidably matched with the front cover (2012), one end of the rear cover (2013) towards the cylinder body (2011) is provided with a sliding groove (11), the second sliding part (2033) is slidably matched with the sliding groove (11), and the oil inlet (12) is arranged on the front cover (2012).

4. The hydraulic wheel brake of claim 1, wherein: The mounting base (1) is provided with two connecting pin shafts (5), one end of each of the two connecting pin shafts (5) is threadedly connected to the mounting base (1), and the two connecting pin shafts (5) are respectively provided through and rotatably connected to the two brake arms (3), the outer circumferential surface of the end away from the threaded end of each of the two connecting pin shafts (5) is provided with a limiting clamping groove (6), and the mounting base (1) is provided with two limiting clamping plates (7) corresponding to the two connecting pin shafts (5), each of the two limiting clamping plates (7) is located in the limiting clamping groove (6) and is fixedly installed on the mounting base (1) by bolts.

5. The hydraulic wheel brake of claim 1, wherein: Each of the two brake arms (3) is threadedly connected with a pressing screw (22), and when the piston (203) of the hydraulic cylinder (2) is in a retracted state, the two pressing screws (22) are respectively provided through the two brake arms (3) and abut against the two sides of the mounting base (1).

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