CN210834112U

CN210834112U - Brake block corrodes adhesion test device

Info

Publication number: CN210834112U
Application number: CN201921606300.9U
Authority: CN
Inventors: 郭东辉; 程时忠; 董鑫; 郑陈冀; 郭江波
Original assignee: Hubei Chibi Salfer Friction Material Co ltd
Current assignee: Hubei Chibi Salfer Friction Material Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-06-23
Anticipated expiration: 2029-09-25

Abstract

The utility model discloses a brake block corrodes adhesion test device, including fixed establishment and actuating mechanism, fixed establishment is used for fixed brake disc, actuating mechanism sets up near fixed establishment, actuating mechanism's drive end is installed and is pressed from both sides tight piece, actuating mechanism is used for the drive press from both sides tight piece and remove to being close to the quotation of brake disc presss from both sides the tight piece of brake disc and tightly is in press from both sides between tight piece and the brake disc, or remove to keeping away from the quotation of brake disc will the brake disc loosens. And the driving mechanism is utilized to drive the clamping blocks to move to the disc surface close to the brake disc and clamp the brake pad between the clamping blocks and the disc surface, and the driving mechanism is utilized to adjust the pressure between the brake pad and the brake pad.

Description

Brake block corrodes adhesion test device

Technical Field

The utility model relates to an automobile brake block check out test set field, concretely relates to brake block corrodes adhesion test device.

Background

In order to test the corrosion adhesion force produced after the parking brake pad and the brake disc are pressed and attached and stay for a certain time, a corrosion adhesion test of the brake pad and the brake disc needs to be performed, and the current corrosion adhesion test device for various brake pads is large in size, complex in structure, high in manufacturing cost and inconvenient to operate.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a brake block corrodes adhesion test device simple structure, and convenient operation, small in size.

In order to achieve the above purpose, the technical solution of the present invention is as follows: the utility model provides a brake block corrodes adhesion test device, includes fixed establishment and actuating mechanism, fixed establishment is used for fixed brake disc, actuating mechanism is close to fixed establishment sets up, actuating mechanism's drive end is installed and is pressed from both sides tight piece, actuating mechanism is used for the drive press from both sides tight piece and remove to being close to the quotation of brake disc, and press from both sides the brake block and press from both sides tight piece with between the brake disc, or remove to keeping away from the quotation of brake disc will the brake block loosens.

The beneficial effects of the above technical scheme are that: and the driving mechanism is utilized to drive the clamping blocks to move to the disc surface close to the brake disc and clamp the brake pad between the clamping blocks and the disc surface, and the driving mechanism is utilized to adjust the pressure between the brake pad and the brake pad.

In the technical scheme, the fixing mechanism comprises a supporting piece and a fastening piece, and the brake disc is detachably mounted on the supporting piece through the fastening piece.

The beneficial effects of the above technical scheme are that: the structure is simple.

In the above technical scheme, the supporting member is a vertical rod which is vertically arranged.

In the technical scheme, the fastener comprises a bolt and a nut in threaded fit with the bolt, a small hole transversely penetrating through the upper end of the upright rod is formed in the upper end of the upright rod, the thread end of the bolt sequentially penetrates through the brake disc and the small hole, and the nut is in threaded connection with the bolt and abuts against the upright rod to fix the brake disc on the upper end of the upright rod.

The beneficial effects of the above technical scheme are that: therefore, the brake disc can be fixed at the upper end of the upright stanchion and can be detached for replacement.

In the technical scheme, the driving mechanism comprises an oil cylinder telescopic component and an oil supply component, a pipe joint of the oil cylinder telescopic component is communicated with a pipe joint of the oil supply component, the oil cylinder telescopic component is arranged near the brake disc, the telescopic direction of the telescopic end of the oil cylinder telescopic component is perpendicular to the disc surface of the brake disc, the clamping block is installed at the telescopic end of the oil cylinder telescopic component, the oil supply component is used for supplying oil to the oil cylinder telescopic component to drive the clamping block to move to be close to the disc surface of the brake disc, or oil drainage is used for driving the oil cylinder telescopic component to drive the clamping block to move to be far away from the brake disc to reset.

The beneficial effects of the above technical scheme are that: the brake disc clamping device is simple in structure, the oil cylinder telescopic component is used for driving the clamping block to move to a disc surface close to or far away from the brake disc, so that a brake pad is clamped between the clamping block and the brake disc or loosened, meanwhile, the compression force of the oil cylinder telescopic component is large in bearing, and the driving end of the oil cylinder telescopic component can apply large pressure.

In the technical scheme, a tee joint is arranged at the communication position of the pipe joint of the oil cylinder telescopic assembly and the pipe joint of the oil supply assembly, and a pressure gauge is arranged at the rest joint of the tee joint.

The beneficial effects of the above technical scheme are that: the applied pressure of the oil cylinder telescopic assembly can be accurately known through a pressure gauge.

In the above technical solution, the oil cylinder telescopic assembly includes a first cylinder, a first piston, a piston rod and a spring, the first piston is slidably disposed in the first cylinder and is in sealing contact with an inner wall of the first cylinder, the first piston can slide in the first cylinder along a length direction thereof, the first cylinder is divided into two chambers by the first piston along a sliding direction thereof, the piston rod is disposed in one of the chambers, one end of the piston rod is vertically and fixedly connected with a middle portion of the first piston, and the other end of the piston rod extends out of the first cylinder and is in sealing contact with the first cylinder, one end of the piston rod extending out of the first cylinder constitutes a telescopic end of the oil cylinder telescopic assembly, the spring is disposed in the other chamber along the sliding direction of the first piston, and two ends of the spring are respectively abutted against ends of the first cylinder and the first piston, which are close to each other, the first cylinder body is kept away from be equipped with the first oilhole rather than inside intercommunication on the lateral wall of the one end of spring, first oilhole constitutes the coupling of hydro-cylinder telescopic subassembly, just first cylinder body is kept away from the one end tip of piston rod is equipped with the mouth that loses heart rather than inside intercommunication.

The beneficial effects of the above technical scheme are that: its simple structure, when first hydraulic fluid port is annotated oil in to first cylinder body, first piston receives hydraulic effect extrusion spring to move its flexible end and contract, and when the pressure at first oil port department reduced to the elastic tension who is less than the spring, first piston backward movement reached its flexible end extension under the elastic tension effect of spring to all let out the oil in the first cylinder body through first hydraulic fluid port.

In the above technical solution, the oil supply assembly includes a second cylinder, a second piston, an oil storage tank, a check valve and a jacking assembly, one end of the second cylinder is provided with a second oil port communicated with the inside of the second cylinder, the second oil port constitutes a pipe joint of the oil supply assembly, the second piston is slidably disposed in the second cylinder and is in sealing contact with the inner wall of the second cylinder, the second piston can slide in the second cylinder along the length direction of the second piston, the second cylinder is divided into two chambers along the sliding direction of the second piston, one end of the second cylinder close to the second oil port is provided with an oil replenishing hole communicated with the inside of the second cylinder, the oil storage tank is disposed above the second cylinder, the lower end of the oil storage tank is provided with an oil outlet, the oil replenishing hole is communicated with the oil outlet, and the check valve is disposed at the communication position of the oil outlet and the oil replenishing hole, the check valve is used for preventing oil in the second cylinder from flowing back to the oil storage tank, the one end that the second cylinder deviates from its coupling is equipped with the through-hole, the jacking subassembly is arranged in the second cylinder deviates from the party of second hydraulic fluid port, and its jacking end warp the through-hole stretches into in the second cylinder and with the second piston offsets, the jacking subassembly is used for the drive the second piston removes to be close to the oil supplementing hole, and will the internal oil warp of second cylinder the second hydraulic fluid port extrudees to the first cylinder in, or the jacking subassembly backs down the oil in the first cylinder is in the extrusion backward flow extremely under the effect of spring in the second cylinder, and drive the second piston resets.

The beneficial effects of the above technical scheme are that: the oil supply device is simple in structure, wherein oil is filled between the second oil cylinder and the first oil cylinder and on an oil path communicated with pipe joints of the second oil cylinder and the first oil cylinder, the jacking assembly jacks the second piston gradually to move the oil in the second cylinder to be gradually extruded into the first cylinder, the first piston gradually moves to the compression spring to enable the telescopic end of the oil cylinder telescopic assembly to contract, when the jacking assembly retreats gradually, the first piston moves to extrude the oil in the first cylinder to flow back into the second cylinder gradually under the action of elastic tension of the spring and extrude the second piston to retreat synchronously with the jacking end of the jacking assembly all the time, and if oil leaks or loses on the oil path communicated with the pipe joints of the second oil cylinder and the first oil cylinder, the oil can be supplied to the oil path from the oil storage tank.

In the above technical scheme the jacking subassembly includes lead screw, connecting block and handle, the connecting block sets up the second cylinder is kept away from the party of second hydraulic fluid port and with the second cylinder is connected fixedly or is connected fixedly through the base, just the connecting block be equipped with one with lead screw thread fit's screw, the screw with the through-hole aligns each other, the lead screw with screw threaded connection, and its one end warp the through-hole stretches into to in the second cylinder and with the second piston offsets, handle fixed mounting be in the other end of lead screw, the lead screw deviates from the one end of handle constitutes the jacking end of jacking subassembly, forward or reverse rotation the lead screw is in order to drive the jacking end jacking of jacking subassembly advances or returns.

The beneficial effects of the above technical scheme are that: the structure is simple, and the screw rod moves relative to the connecting block to realize jacking or retreating by rotating the handle.

Drawings

FIG. 1 is a schematic view of a brake pad corrosion adhesion test device according to an embodiment of the present invention.

In the figure: the hydraulic brake comprises a fixing mechanism 1, a support member 11, a fastener 12, a bolt 121, a nut 122, a driving mechanism 2, a clamping block 20, a cylinder telescopic assembly 21, a first cylinder body 211, a first oil hole 2111, an air leakage port 2112, a first piston 212, a piston rod 213, a spring 214, an oil supply assembly 22, a second cylinder body 221, a second oil hole 2211, an oil supplement hole 2212, a second piston 222, an oil storage tank 223, an oil outlet 2231, a check valve 224, a jacking assembly 225, a 2251 screw rod 2252 connecting block, a 2253 handle, a 23 pressure gauge, a 3 brake disc, a 4 brake disc and a 5 base.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the present embodiment provides a brake pad corrosion adhesion test device, which includes a fixing mechanism 1 and a driving mechanism 2, where the fixing mechanism 1 is configured to fix a brake disc 3, the driving mechanism 2 is disposed near the fixing mechanism 1, a clamping block 20 is installed at a driving end of the driving mechanism 2, and the driving mechanism 2 is configured to drive the clamping block 20 to move to a disc surface close to the brake disc 3, and clamp a brake pad 4 between the clamping block 20 and the brake disc 3, or move to a disc surface far from the brake disc 3 and release the brake pad 4. And the driving mechanism is utilized to drive the clamping blocks to move to the disc surface close to the brake disc and clamp the brake pad between the clamping blocks and the disc surface, and the driving mechanism is utilized to adjust the pressure between the brake pad and the brake pad.

In the above technical solution, the fixing mechanism 1 includes a support 11 and a fastener 12, and the brake disc 3 is detachably mounted on the support 11 through the fastener 12.

In the above technical solution, the supporting member 11 is a vertical rod.

In the above technical solution, the fastening member 12 includes a bolt 121 and a nut 122 in threaded fit with the bolt, the upper end of the upright rod is provided with a small hole transversely penetrating through the bolt 121, the thread end of the bolt 121 sequentially penetrates through the brake disc and the small hole, and the nut 122 is in threaded connection with the bolt 121 and abuts against the upright rod to fix the brake disc 3 at the upper end of the upright rod. Therefore, the brake disc can be fixed at the upper end of the upright stanchion and can be detached for replacement.

In the above technical scheme, the driving mechanism 2 includes an oil cylinder telescopic assembly 21 and an oil supply assembly 22, a pipe joint of the oil cylinder telescopic assembly 21 is communicated with a pipe joint of the oil supply assembly 22, the oil cylinder telescopic assembly 21 is arranged near the brake disc 3, the telescopic direction of the telescopic end of the oil cylinder telescopic assembly is perpendicular to the disc surface of the brake disc 3, the clamping block 20 is installed at the telescopic end of the oil cylinder telescopic assembly 21, the oil supply assembly 22 is used for supplying oil to the oil cylinder telescopic assembly 21 to drive the clamping block 20 to move to be close to the disc surface of the brake disc 3, or oil drainage is used for driving the oil cylinder telescopic assembly 21 to drive the clamping block 20 to move to be far away from the brake disc 3 to reset. The brake disc clamping device is simple in structure, the oil cylinder telescopic component is used for driving the clamping block to move to a disc surface close to or far away from the brake disc, so that a brake pad is clamped between the clamping block and the brake disc or loosened, meanwhile, the compression force of the oil cylinder telescopic component is large in bearing, and the driving end of the oil cylinder telescopic component can apply large pressure.

In the technical scheme, a tee joint is arranged at the communication position of the pipe joint of the oil cylinder telescopic assembly 21 and the pipe joint of the oil supply assembly 22, and a pressure gauge 23 is arranged at the rest interface of the tee joint. The applied pressure of the oil cylinder telescopic assembly can be accurately known through a pressure gauge.

In the above technical solution, the cylinder extension assembly 21 includes a first cylinder 211, a first piston 212, a piston rod 213 and a spring 214, the first piston 212 is slidably disposed in the first cylinder 211 and is in sealing contact with an inner wall of the first cylinder 211, the first piston 212 can slide in the first cylinder 211 along a length direction thereof, the first cylinder 211 is divided into two chambers by the first piston 212 along a sliding direction thereof, the piston rod 213 is disposed in one of the chambers, one end of the piston rod 213 is vertically and fixedly connected with a middle portion of the first piston 212, and the other end thereof extends out of the first cylinder 211 and is in sealing contact with the first cylinder 211, and one end of the piston rod 213 extending out of the first cylinder 211 constitutes an extension end of the cylinder extension assembly 21, the spring 214 is disposed in the other chamber along the sliding direction of the first piston 212, and its both ends respectively with the mutual butt of one end that first cylinder body 211 and first piston 212 are close to each other, first cylinder body 211 is kept away from be equipped with the first oilhole 2111 rather than inside intercommunication on the lateral wall of the one end of spring 214, first oilhole 2111 constitutes the coupling of hydro-cylinder expansion assembly 21, just first cylinder body 211 is kept away from the one end tip of piston rod 213 is equipped with the mouth 2112 that loses heart rather than inside intercommunication. Its simple structure, when first hydraulic fluid port is annotated oil in to first cylinder body, first piston receives hydraulic effect extrusion spring to move its flexible end and contract, and when the pressure at first oil port department reduced to the elastic tension who is less than the spring, first piston backward movement reached its flexible end extension under the elastic tension effect of spring to all let out the oil in the first cylinder body through first hydraulic fluid port.

In the above technical solution, the oil supply assembly 22 includes a second cylinder 221, a second piston 222, an oil storage tank 223, a check valve 224 and a jacking assembly 225, one end of the second cylinder 221 is provided with a second oil port 2211 communicated with the inside thereof, the second oil port 2211 constitutes a pipe joint of the oil supply assembly 22, the second piston 222 is slidably disposed in the second cylinder 221 and is in sealing contact with the inner wall of the second cylinder 221, the second piston 222 is slidable in the second cylinder 221 along the length direction thereof, the second piston 222 divides the second cylinder 221 into two chambers along the sliding direction thereof, one end of the second cylinder 221 close to the second oil port 2211 is provided with an oil supplementing hole 2212 communicated with the inside thereof, the oil storage tank 223 is disposed above the second cylinder 221, the lower end thereof is provided with an oil outlet 2231, the oil supplementing hole 2212 is communicated with the oil outlet 2231, and the check valve 224 is disposed at the communication position of the two oil outlet and the oil supplementing hole 2211, the check valve 224 is used for preventing the oil in the second cylinder 221 from flowing back to the oil storage tank 223, a through hole is formed in one end, deviating from the pipe joint, of the second cylinder 221, the jacking assembly 225 is arranged on one side, deviating from the second oil port 2211, of the second cylinder 221, the jacking end of the jacking assembly passes through the through hole and extends into the second cylinder 221 and abuts against the second piston 222, the jacking assembly 225 is used for driving the second piston 222 to move close to the oil supplementing hole 2212 and extrude the oil in the second cylinder 221 through the second oil port 2211 into the first cylinder 211, or the jacking assembly 225 backs the oil in the first cylinder 211 and extrudes and flows back to the second cylinder 221 under the action of the spring 214 and drives the second piston 222 to reset. The oil supply device is simple in structure, wherein oil is filled between the second oil cylinder and the first oil cylinder and on an oil path communicated with pipe joints of the second oil cylinder and the first oil cylinder, the jacking assembly jacks the second piston gradually to move the oil in the second cylinder to be gradually extruded into the first cylinder, the first piston gradually moves to the compression spring to enable the telescopic end of the oil cylinder telescopic assembly to contract, when the jacking assembly retreats gradually, the first piston moves to extrude the oil in the first cylinder to flow back into the second cylinder gradually under the action of elastic tension of the spring and extrude the second piston to retreat synchronously with the jacking end of the jacking assembly all the time, and if oil leaks or loses on the oil path communicated with the pipe joints of the second oil cylinder and the first oil cylinder, the oil can be supplied to the oil path from the oil storage tank.

In the above technical solution, the jacking assembly 225 includes a screw rod 2251, a connecting block 2252 and a handle 2253, the connecting block 2252 is disposed on a side of the second cylinder 221 away from the second oil port 2211 and is connected and fixed with the second cylinder 221 or is connected and fixed through a base 5, the connecting block 2252 is provided with a screw hole in threaded fit with the screw rod 2251, the screw hole is aligned with the through hole, the screw rod 2251 is in threaded connection with the screw hole, and one end of the screw rod 2252 extends into the second cylinder 221 through the through hole and abuts against the second piston 222, the handle 2253 is fixedly mounted at the other end of the screw rod 2251, one end of the screw rod 2251 facing away from the handle 2253 constitutes a jacking end of the jacking assembly 225, and the screw rod 2251 is rotated forward or backward to drive the jacking end of the jacking assembly 225 to jack or retract. The structure is simple, and the screw rod moves relative to the connecting block to realize jacking or retreating by rotating the handle.

Before a corrosion adhesion test of the brake pad 4 is carried out, the working surface of the brake disc 3 needs to be finely ground to meet the roughness requirement specified by the test; and then, polishing the surface of the friction material of the brake pad 4 by using fine sand paper, and soaking the surface by using a certain proportion of saline solution for a specified time of the test. The brake disc 3 is arranged on the support frame through a fastener, the processed brake pad 5 is attached to the working surface of the brake disc 46, the handle is rotated to drive the head of the screw rod to push the second piston to jack, the pressure of an oil circuit system of the test device is increased, and therefore the first piston moves to an extrusion spring and the brake pad of the clamping block 20 is pressed between the clamping block and the brake disc. The handle is rotated until the pressure gauge 23 reaches a pressure value specified in the test. Keeping the specified pressure unchanged, and rotating the handle in the reverse direction after keeping the specified time to gradually reduce the system oil pressure to zero, and taking down the brake pad 4 to finish the test. The utility model discloses brake block corrodes adhesion test device, simple structure, convenient to use, it is small, light in weight, easy operation is reliable and simple.

When the brake block is clamped between the brake disc and the clamping block, the working surface of the brake disc is attached to the working surface of the brake block.

Wherein, still can overlap on the bolt and establish a piece of packing ring, the packing ring is located between pole setting and the brake disc to avoid the brake disc with the pole setting contact, just one side that the brake disc deviates from its working face with first cylinder body butt (can arrange first cylinder body in the pole setting top, and the piston rod with the bolt is parallel, first cylinder body is close to press from both sides the one end of tight piece with one side that the brake disc deviates from the working face flushes and laminates), so can avoid pressing from both sides tight piece and exert pressure and lead to the brake disc to warp excessively.

Wherein, connecting block, second cylinder body, first cylinder body and oil storage tank all can be in through support fixed mounting on the base, just the pole setting is erect on the base.

Wherein, the upper end of the oil storage tank is open to facilitate oil filling, and a cover can be arranged at the open to cover the oil storage tank, so that dust can be prevented from entering the oil storage tank.

The handle can be a hand wheel, and the hand wheel is coaxially and fixedly connected with one end, far away from the second piston, of the screw rod.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a brake block corrodes adhesion test device, its characterized in that, includes fixed establishment (1) and actuating mechanism (2), fixed establishment (1) is used for fixed brake disc (3), actuating mechanism (2) are close to fixed establishment (1) sets up, tight piece (20) are pressed from both sides is installed to the drive end of actuating mechanism (2), actuating mechanism (2) are used for the drive press from both sides tight piece (20) and remove to being close to the quotation of brake disc (3) to press from both sides brake block (4) and press from both sides tight piece (20) with between brake disc (3), or remove to keeping away from the quotation of brake disc (3) and will brake block (4) loosen.

2. The brake pad corrosion adhesion test device of claim 1, wherein the fixing mechanism (1) comprises a support member (11) and a fastener (12), and the brake disc (3) is detachably mounted on the support member (11) through the fastener (12).

3. The brake pad corrosion adhesion test device of claim 2, wherein the support member (11) is a vertically disposed vertical rod.

4. The brake pad corrosion adhesion test device of claim 3, wherein the fastener (12) comprises a bolt (121) and a nut (122) in threaded fit with the bolt, the upper end of the upright is provided with a small hole transversely penetrating through the upright, the threaded end of the bolt (121) sequentially penetrates through the brake disc and the small hole, and the nut (122) is in threaded connection with the bolt (121) and abuts against the upright to fix the brake disc (3) at the upper end of the upright.

5. The brake pad corrosion adhesion test apparatus of any one of claims 1 to 4, it is characterized in that the driving mechanism (2) comprises an oil cylinder telescopic component (21) and an oil supply component (22), the pipe joint of the oil cylinder telescopic component (21) is communicated with the pipe joint of the oil supply component (22), the oil cylinder telescopic component (21) is arranged near the brake disc (3), the extension direction of the extension end of the clamping block is vertical to the disc surface of the brake disc (3), the clamping block (20) is arranged at the extension end of the oil cylinder extension component (21), the oil supply assembly (22) is used for supplying oil to the oil cylinder telescopic assembly (21) to drive the clamping block (20) to move to a disc surface close to the brake disc (3), or oil is drained to drive the oil cylinder telescopic assembly (21) to drive the clamping block (20) to move away from the brake disc (3) to reset.

6. The brake pad corrosion and adhesion test device according to claim 5, wherein a tee joint is arranged at the communication position of the pipe joint of the oil cylinder telescopic assembly (21) and the pipe joint of the oil supply assembly (22), and a pressure gauge (23) is arranged at the rest interface of the tee joint.

7. The brake pad corrosion and adhesion test device according to claim 6, wherein the cylinder extension assembly (21) comprises a first cylinder (211), a first piston (212), a piston rod (213) and a spring (214), the first piston (212) is slidably disposed in the first cylinder (211) and is in sealing contact with the inner wall of the first cylinder (211), the first piston (212) can slide in the first cylinder (211) along the length direction thereof, the first piston (212) divides the first cylinder (211) into two chambers along the sliding direction thereof, the piston rod (213) is disposed in one of the two chambers, one end of the piston rod (213) is vertically and fixedly connected with the middle of the first piston (212), and the other end thereof extends out of the first cylinder (211) and is in sealing contact with the first cylinder (211), piston rod (213) stretch out to the one end of first cylinder body (211) constitutes the flexible end of hydro-cylinder subassembly (21), spring (214) are followed first piston (212) slip direction is arranged in another in the cavity, and its both ends respectively with the mutual butt of one end that first cylinder body (211) and first piston (212) are close to each other, keep away from in first cylinder body (211) be equipped with on the lateral wall of the one end of spring (214) first oilhole (2111) rather than inside intercommunication, first oilhole (2111) constitutes the coupling of hydro-cylinder subassembly (21), just first cylinder body (211) are kept away from the one end tip of piston rod (213) is equipped with disappointing mouth (2112) rather than inside intercommunication.

8. The brake pad corrosion adhesion test device according to claim 7, wherein the oil supply assembly (22) comprises a second cylinder (221), a second piston (222), an oil storage tank (223), a one-way valve (224) and a jacking assembly (225), one end of the second cylinder (221) is provided with a second oil port (2211) communicated with the inside of the second cylinder, the second oil port (2211) forms a pipe joint of the oil supply assembly (22), the second piston (222) is slidably arranged in the second cylinder (221) and is in sealing contact with the inner wall of the second cylinder (221), the second piston (222) can slide in the second cylinder (221) along the length direction of the second piston, the second piston (222) divides the second cylinder (221) into two chambers along the sliding direction of the second piston, one end of the second cylinder (221) close to the second oil port (2211) is provided with an oil supplement port (2212) communicated with the inside of the second cylinder, the oil storage tank (223) is arranged above the second cylinder body (221), the lower end of the oil storage tank is provided with an oil outlet (2231), the oil supplementing hole (2212) is communicated with the oil outlet (2231), a one-way valve (224) is arranged at the communication position of the oil supplementing hole and the oil outlet (2231), the one-way valve (224) is used for preventing oil in the second cylinder body (221) from flowing back into the oil storage tank (223), one end, deviating from a pipe joint, of the second cylinder body (221) is provided with a through hole, the jacking assembly (225) is arranged on one side, deviating from the second oil port (2211), of the second cylinder body (221), the jacking end of the jacking assembly extends into the second cylinder body (221) through the through hole and abuts against the second piston (222), the jacking assembly (225) is used for driving the second piston (222) to move close to the oil supplementing hole (2212) and extruding oil in the second cylinder body (221) into the first cylinder body (211) through the second oil port (2211), or the jacking assembly (225) backs the oil in the first cylinder body (211) to be extruded and reflowed into the second cylinder body (221) under the action of the spring (214) and drives the second piston (222) to reset.

9. The brake pad corrosion and adhesion test device of claim 8, wherein the jacking assembly (225) comprises a screw rod (2251), a connecting block (2252) and a handle (2253), the connecting block (2252) is disposed on the second cylinder (221) on the side away from the second oil port (2211) and is connected to the second cylinder (221) or is connected to the second cylinder through a base (5), the connecting block (2252) is provided with a screw hole in threaded engagement with the screw rod (2251), the screw hole and the through hole are aligned with each other, the screw rod (2251) is in threaded connection with the screw hole, and one end of the screw rod (2251) extends into the second cylinder (225221) through the through hole and abuts against the second piston (222), the handle (2253) is fixedly mounted on the other end of the screw rod (2251), and the end of the screw rod (2251) facing away from the handle (3) constitutes the jacking end of the jacking assembly (225), the screw rod (2251) is rotated forwards or reversely to drive the jacking end of the jacking assembly (225) to jack or retract.