CN210375754U

CN210375754U - Brake block sampler

Info

Publication number: CN210375754U
Application number: CN201921220677.0U
Authority: CN
Inventors: 李大印; 李文涵
Original assignee: Shandong Yuxi Instrument Co ltd
Current assignee: Shandong Yuxi Instrument Co ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-04-21
Anticipated expiration: 2029-07-29

Abstract

The utility model discloses a brake pad sampler, which comprises a shell, wherein a support plate is arranged in the shell, and a brake pad cutting mechanism and a brake pad grinding mechanism are arranged on the support plate; brake block cutting mechanism includes fixed establishment and cutting mechanism, brake block grinding mechanism includes grinding machanism and positioning fixture, the position that corresponds with brake block grinding mechanism in the backup pad is equipped with the second through-hole, and the backup pad lower extreme is equipped with the hopper, second through-hole and hopper intercommunication, the backup pad below is equipped with negative-pressure air fan and dump bin, negative-pressure air fan input and hopper intercommunication, negative-pressure air fan output and dump bin intercommunication. The sampling efficiency is improved, the safety and reliability are realized, the sample is fixed firmly, and the processing precision is increased.

Description

Brake block sampler

Technical Field

The utility model belongs to the technical field of brake block sampling test technique and specifically relates to a brake block sampler.

Background

The working principle of the brake mainly comes from friction, and the kinetic energy of the vehicle is converted into heat energy after friction by using the friction between a brake pad and a brake disc (drum) and between a tire and the ground, so that the vehicle is stopped. A good and efficient braking system must provide a stable, sufficient and controllable braking force, and have good hydraulic transmission and heat dissipation capability, so as to ensure that the force applied by the driver from the brake pedal can be sufficiently and effectively transmitted to the master cylinder and the slave cylinders, and to avoid hydraulic failure and brake recession caused by high heat. Therefore, the sampling detection of the brake pad is very important.

However, the existing brake pad sampling equipment has the following problems of high labor intensity, low sampling efficiency, high danger, 2, insecure sample fixation, low processing precision and 3, serious dust pollution.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve above-mentioned problem, provide a brake block sampler, improved sample efficiency, safe and reliable, the sample is fixed firm, has increased the machining precision.

The utility model provides a technical scheme that its technical problem adopted is:

a brake pad sampler comprises a shell, wherein a support plate is arranged in the shell, and a brake pad cutting mechanism and a brake pad grinding mechanism are arranged on the support plate;

the brake pad cutting mechanism comprises a fixing mechanism and a cutting mechanism, the fixing mechanism and the cutting mechanism are installed on a supporting plate, the fixing mechanism comprises a first sliding plate, a second sliding plate and a rotary plate, the first sliding plate is connected with the supporting plate in a sliding mode, the first sliding plate is connected with the second sliding plate in a sliding mode, the rotary plate is connected with the second sliding plate in a rotating mode, a first positioning block is arranged on the rotary plate, a sliding block is arranged in the first positioning block, the sliding block slides in the first positioning block, the upper end of the sliding block is matched with a brake pad, a pressing plate is arranged at the upper end of the first positioning block, a fixing pressing head is arranged at the end portion of the pressing plate, the lower end face of the fixing pressing head is matched with the brake pad, the cutting mechanism comprises a first motor and a cutter, the first motor is installed;

the brake pad grinding mechanism comprises a grinding mechanism and a positioning clamp, the grinding mechanism comprises a support frame and a second motor, the lower end of the support frame is connected with the support plate in a sliding mode, the second motor is connected with the support frame in a sliding mode, a grinding disc is arranged at the output end of the second motor, the positioning clamp comprises a second positioning block and a clamping plate, a positioning groove is formed in the second positioning block, the lower end of the positioning groove is an arc-shaped surface, and the clamping plate is installed on the side face of the second positioning block;

the position that corresponds with brake block grinding mechanism in the backup pad is equipped with the second through-hole, and the backup pad lower extreme is equipped with the hopper, second through-hole and hopper intercommunication, the backup pad below is equipped with second negative-pressure air fan and dump bin, and second negative-pressure air fan input and hopper intercommunication, second negative-pressure air fan output and dump bin intercommunication.

Further, the terminal surface is the arc under the fixed pressure head, the clamp plate lower extreme is equipped with movable pressure head, swing joint between activity pressure head and the clamp plate, and the terminal surface is the arc under the activity pressure head, and terminal surface and brake block cooperation under the activity pressure head all are equipped with the rubber layer fixed pressure head and activity pressure head lower extreme.

Furthermore, a fixing shaft is arranged in the middle of the second sliding plate and penetrates through the middle of the rotating shaft, a first baffle is arranged at the upper end of the fixing shaft, and the first baffle is connected with the upper end of the fixing shaft through a screw.

Furthermore, a positioning hole is formed in the cylindrical surface of the rotary table, a vertical plate is arranged on the second sliding plate, and a positioning mechanism is arranged between the vertical plate and the second sliding plate.

Furthermore, a groove is formed in the first positioning block, the sliding block is located in the groove, and the sliding block is connected with the inner wall of the groove in a sliding mode.

Furthermore, a clamping groove is formed in the outer side of the first positioning block and matched with the pressing plate, a compression nut is arranged at the upper end of the pressing plate and penetrates through the pressing plate to be connected with threads at the upper end of the first positioning block.

Furthermore, a cavity is arranged in the second positioning block, a first negative pressure fan is arranged on the supporting plate and connected with the cavity through a first air pipe, a first air port is formed in the side face of the positioning groove, a second air pipe is arranged at the upper end of the second positioning block, the two ends of the second air pipe are communicated with the cavity, a second air port is formed in the second air pipe, and a first through hole is formed in the lower end of the positioning groove.

Further, be equipped with the backing plate in the constant head tank, be equipped with the third through-hole on the backing plate, first through-hole and third through-hole one-to-one, the terminal surface is the arcwall face under the backing plate, and the arcwall face of terminal surface closely cooperates with constant head tank bottom face under the backing plate, and the backing plate up end is the plane.

The utility model has the advantages that:

1. the utility model is provided with a shell, a supporting plate is arranged in the shell, and a brake pad cutting mechanism and a brake pad grinding mechanism are arranged on the supporting plate; in the brake block sample process, brake block cutting mechanism and brake block grinding mechanism all are located the casing, adopt totally enclosed formula structure, and the qianmen is closed during the sample, and the closed operation, cutter and emery wheel are kept away from to the staff, to operating personnel's no potential safety hazard, and the sample is accurate, and the brake block sample of required length, wide size can be cut out to a clamping, and the inefficiency that the clamping brought many times of having discharged, adjustment error are big, the poor condition of size precision. Meanwhile, the integrated structure is adopted, so that no special requirements are required for a use site, and the installation and the movement are convenient.

2. The utility model discloses the position that corresponds with brake block grinding mechanism in the well backup pad is equipped with the second through-hole, and the backup pad lower extreme is equipped with the hopper, second through-hole and hopper intercommunication, the backup pad below is equipped with negative-pressure air fan and dump bin, negative-pressure air fan input and hopper intercommunication, negative-pressure air fan output and dump bin intercommunication. Compact structure, dust extraction device, reduce cost, no pollution to environment and no harm to operators.

3. The utility model discloses well locating piece upper end is equipped with the clamp plate, and the clamp plate tip is equipped with fixed pressure head, and the terminal surface is the arc under the fixed pressure head, terminal surface and brake block cooperation under the fixed pressure head, the clamp plate lower extreme is equipped with movable pressure head, swing joint between activity pressure head and the clamp plate, and the terminal surface is the arc under the activity pressure head, terminal surface and brake block cooperation under the activity pressure head, and fixed pressure head and activity pressure head lower extreme all are equipped with the rubber layer, through fixed pressure head and the cooperation of activity pressure head, can be more firm compress tightly the brake block, and good reliability, the pressure head that moves simultaneously reciprocates, can carry out firm fixed to the brake block of different models, and the practicality is good, and the rubber layer can make.

4. The utility model is provided with a positioning block on the middle turntable, a slide block is arranged in the positioning block, the slide block slides in the positioning block, and the upper end of the slide block is matched with the brake block; during cutting, the position of the sliding block can be moved according to brake pads with different sizes, and the practicability is good.

5. The utility model discloses be equipped with the cavity in the well locating piece, be equipped with the fan in the backup pad, the fan is connected with the cavity through first tuber pipe, and the constant head tank side is equipped with first wind gap, and the locating piece upper end is equipped with the second tuber pipe, and second tuber pipe both ends and cavity intercommunication are equipped with the second wind gap on the second tuber pipe, the constant head tank lower extreme is equipped with first through-hole, and the fan starts, and the fan blows air in the cavity through first tuber pipe to the cavity, and the gas of cavity is blown away the constant head tank through first wind gap, and when reversing the appearance spare, the wind that blows off in the first wind gap blows off the powder in the constant head tank away, or falls down through first through-hole, prevents that the powder from piling up in; in normal grinding process, in the gas in the cavity can enter into the second air pipe, the gas in the second air pipe blows out through the second air port, and the powder on the surface of the sample piece is blown off, so that the cleanness and tidiness of the grinding surface are ensured.

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 for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side view of the brake block cutting mechanism of the present invention;

FIG. 3 is a first schematic structural view of the fixing mechanism of the present invention;

FIG. 4 is a schematic structural view of a fixing mechanism of the present invention;

FIG. 5 is a schematic view of the fixing mechanism of the present invention;

fig. 6 is a sectional view of the fixing mechanism of the present invention;

FIG. 7 is a schematic structural view of the brake pad grinding mechanism of the present invention;

FIG. 8 is a schematic view of the positioning fixture of the present invention;

fig. 9 is a sectional view of the positioning jig of the present invention;

FIG. 10 is a schematic view of the structure of the backing plate of the present invention;

fig. 11 is a front view of the internal structure of the present invention.

In the figure: the device comprises a shell 1, a supporting plate 2, a first sliding plate 3, a second sliding plate 4, a rotary table 5, a dust cover 6, a first positioning block 7, a sliding block 8, a brake pad 9, a pressing plate 10, a fixed pressure head 11, a movable pressure head 12, a rubber layer 13, a fixed shaft 14, a first baffle plate 15, a positioning hole 16, a vertical plate 17, a shell 18, a positioning screw 19, a second baffle plate 20, a compression spring 21, a positioning groove 22, a positioning block 23, a groove 24, a clamping groove 25, a compression nut 26, a lead screw 27, a guide rod 28, a first motor 29, a cutter 30, a supporting frame 31, a second motor 32, a grinding disc 33, a second positioning block 34, a clamping plate 35, a positioning groove 36, a cavity 37, a first negative pressure fan 38, a first air pipe 39, a first air port 40, a second air pipe 41, a second air port 42, a first through hole 43, a backing plate 44, a.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

For convenience of description, a coordinate system is now defined as shown in fig. 1.

As shown in fig. 1, 2 and 11, a brake pad sampler is characterized by comprising a shell 1, wherein a support plate 2 is arranged in the shell, and a brake pad cutting mechanism and a brake pad grinding mechanism are arranged on the support plate 2; in the brake block sample process, brake block cutting mechanism and brake block grinding mechanism all are located casing 1, adopt totally enclosed formula structure, and the qianmen is closed during the sample, and closed operation, cutter and emery wheel are kept away from to the staff, to operating personnel's no potential safety hazard, and the sample is accurate, and the brake block sample of required length, wide size can be cut out to a clamping, and the inefficiency that the clamping brought has been discharged many times, the adjustment error is big, the poor condition of size precision. Meanwhile, the integrated structure is adopted, so that no special requirements are required for a use site, and the installation and the movement are convenient.

As shown in fig. 2 to 6, the brake pad cutting mechanism includes a fixing mechanism and a cutting mechanism, the fixing mechanism and the cutting mechanism are mounted on the support plate 2, the fixing mechanism includes a first slide plate 3, a second slide plate 4 and a rotary table 5, the first slide plate 3 and the support plate 2 are slidably connected through a guide rail-slide block pair, the first slide plate 3 and the support plate 2 are driven by a lead screw nut, the first slide plate 3 and the second slide plate 4 are slidably connected through a guide rail-slide block pair, the first slide plate 3 and the second slide plate 4 are driven by a lead screw nut, the rotary table 5 and the second slide plate 4 are rotatably connected, the rotary table 5 is provided with a first positioning block 7, a slide block 8 is arranged in the first positioning block 7, the slide block 8 slides in the first positioning block 7, and the upper end of the slide block 8 is matched with the brake pad 9; the upper end of the first positioning block 7 is provided with a pressing plate 10, the end part of the pressing plate 10 is provided with a fixed pressing head 11, the lower end surface of the fixed pressing head 11 is arc-shaped, the lower end surface of the fixed pressing head 11 is matched with a brake pad 9, the lower end of the pressing plate 10 is provided with a movable pressing head 12, the movable pressing head 12 is movably connected with the pressing plate 10, the lower end surface of the movable pressing head 12 is arc-shaped, the lower end surface of the movable pressing head 12 is matched with the brake pad 9, the lower ends of the fixed pressing head 11 and the movable pressing head 12 are both provided; the cutting mechanism comprises a first motor 29 and a cutter 30, the first motor 29 is installed on the supporting plate 2, a groove is formed in the supporting plate 2, the first motor is conveniently placed, the cutter 30 is installed on an output shaft of the first motor 29, and a dust cover is arranged at a position, corresponding to the first motor, on the supporting plate 2.

During sampling and cutting, the first motor 29 rotates to drive the cutter 30 to rotate, the brake pad is placed at the upper end of the sliding block 8, the brake pad is tightly attached to the upper end face of the sliding block 8, then the pressing plate 10 is moved downwards, the lower end face of the fixed pressing head 11 is tightly pressed onto the brake pad 9 and tightly attached to the brake pad 9, then the movable pressing head 12 is moved downwards, and the brake pad 9 can be more firmly pressed through the matching of the fixed pressing head 11 and the movable pressing head 12, so that the reliability is good; meanwhile, the movable pressure head 12 moves up and down, so that brake pads of different types can be firmly fixed, and the practicability is good; during cutting, the position of the sliding block 8 can be moved according to brake pads with different sizes, and the practicability is good. Then the first sliding plate 3 is moved back and forth, the cutter 30 cuts the brake pad for the first time, the first sliding plate 3 returns to the original position, the second sliding plate 4 moves for a distance leftwards, the cutter 30 cuts for the second time, then the rotary disc 5 rotates for 90 degrees, the two cutters are cut again, and the sampling can be completed by matching with the two previous cutting.

As shown in fig. 6, a fixed shaft 14 is disposed at the middle position of the second sliding plate 4, a through hole is disposed at the middle position of the rotating disc 5, the fixed shaft 14 penetrates through the through hole at the middle position of the rotating shaft, a first baffle 15 is disposed at the upper end of the fixed shaft 14, the first baffle 15 is connected with the upper end of the fixed shaft 14 through a screw, the rotating disc 5 can rotate around the fixed shaft 14, and the first baffle 15 plays a role in fixing the rotating disc 5.

As shown in fig. 6, a positioning hole 16 is formed on the cylindrical surface of the turntable 5, a vertical plate 17 is arranged on the second sliding plate 4, and a positioning mechanism is arranged between the vertical plate 17 and the second sliding plate 4.

As shown in fig. 6, the positioning mechanism includes a housing 18 and a positioning screw 19, the housing 18 is mounted on the outer side of the vertical plate 17 by a screw, the positioning screw 19 is provided with a second baffle 20, the second baffle 20 contacts with the outer side of the vertical plate 17, the positioning screw 19 is provided with a compression spring 21, the compression spring 21 is located in the housing 18, one end of the compression spring 21 contacts with the second baffle 20, the other end of the compression spring 21 contacts with the inner wall of the housing 18, the end of the positioning screw 19 is matched with the positioning hole 16, the hexagonal end of the positioning screw 19 is provided with a positioning groove 22, the end of the housing 18 is provided with a positioning block 23, the positioning block 23 is matched with the positioning groove 22, when in use, the positioning screw 19 can be pulled out, the positioning screw 19 is rotated to rotate the positioning screw 19, the positioning block 23 and the positioning, the positioning block 23 is matched with the positioning groove 22, and the end part of the positioning screw 19 extends into the positioning hole 16 to realize the positioning of the rotary table.

As shown in fig. 5 and 6, a groove 24 is formed in the first positioning block 7, the slider 8 is located in the groove 24, the slider 8 is slidably connected with the inner wall of the groove 24 through a guide rail slider pair, and the rear end of the slider 8 is driven by a lead screw nut with the first positioning block 7.

The outside of first locating piece 7 is equipped with draw-in groove 25, and clamp plate 10 is the right angle, and draw-in groove 25 and the cooperation of the vertical board of clamp plate 10, the clamp plate 10 upper end is equipped with gland nut 26, gland nut 26 pass behind the clamp plate 10 with 7 upper end threaded connection of first locating piece. The clamping groove 25 plays a limiting role and prevents the pressing plate 10 from rotating.

As shown in fig. 4, the upper end of the movable pressing head 12 is provided with a lead screw 27, the lower end of the lead screw 27 is rotatably connected with the movable pressing head 12, the upper end of the lead screw 27 penetrates through the pressing plate 10 and is in threaded connection with the pressing plate 10, the upper end of the movable pressing head 12 is located at two ends of the lead screw 27 and is provided with guide rods 28, the lower end of each guide rod 28 is fixedly connected with the movable pressing head 12, and the upper end of each guide rod 28 penetrates through.

As shown in fig. 7 to 10, the brake pad grinding mechanism includes a grinding mechanism and a positioning fixture, the grinding mechanism includes a support frame 31 and a second motor 32, the lower end of the support frame 31 is slidably connected to the support plate 2 through a guide rail and slider pair, the lower end of the support frame 31 is driven by a second motor lead screw to the support plate 2, the second motor 32 is slidably connected to the support frame 31 through a guide rail and slider pair, the lower end of the support frame 31 is driven by a second motor lead screw to the second motor 32, and an output end of the second motor 32 is provided with a grinding disc 33;

as shown in fig. 8 and 9, the positioning fixture includes a second positioning block 34 and a clamping plate 35, the grinding disc 33 is located above the second positioning block 34, the second positioning block 34 is provided with a positioning groove 36, the lower end of the positioning groove 36 is an arc-shaped surface, the clamping plate 35 is installed on the side surface of the second positioning block 34, a cavity 37 is provided in the second positioning block 34, the support plate 2 is provided with a first negative pressure fan 38, the first negative pressure fan 38 is connected with the cavity 37 through a first air duct 39, the side surface of the second positioning block 34 is provided with a connector, the first air duct 39 is connected with the connector through a hoop, the connector is communicated with the cavity 37, the side surface of the positioning groove 36 is provided with a first air port 40, the cavity 37 is communicated with the positioning groove 36 through the first air port 40, the upper end of the second positioning block 34 is provided with a second air duct 41, two ends of the second air duct 41 are communicated with the cavity 37, the lower end of the positioning groove 36 is provided with a first through hole 43, and the first tuyere 40 and the second tuyere 42 are both elongated holes.

When carrying out the sample grinding, place the locating slot 36 with the good sample of cutting in, hug closely the sample wafer one side that has the concave surface on the recess of terminal surface under the locating slot, and press from both sides tightly through clamp plate 35, later start second motor 32, second motor 32 drives mill 33 and rotates, carry out the grinding of first face for the first time, according to mill 33 lower plane and the second locating piece 34 distance size between the upper plane, the preliminary estimate, control sample thickness is about 8mm after the grinding for the first time, wherein the locating slot 36 degree of depth is 4mm, protruding about 4 mm. First face grinds and takes out the sample wafer after flat, clearance constant head tank 36, overturn the sample wafer, press from both sides tightly again, hand vertical feed handle, make grinding wheel and the 34 up end contact of second locating piece, the handle is waved in the reverse direction again, make grinding wheel shift up 2mm, the measurement of here distance is gone on through the digital display scale, the digital display scale is prior art, do not do too much repeated here, after carry out the planar grinding of second time, the thickness that control sample wafer touched is 6mm, sample after the grinding detects.

When the first negative pressure fan 38 is started, the first negative pressure fan 38 blows air into the cavity 37 through the first air pipe 39, the air in the cavity 37 is blown into the positioning groove 36 through the first air port 40, and when the sample piece is reversed, the powder in the positioning groove 36 is blown away by the air blown out from the first air port 40 or falls down through the first through hole 43, so that the powder is prevented from being accumulated in the positioning groove 36, and the uniform thickness of the ground sample piece is ensured; in the normal grinding process, the gas in the cavity 37 can enter the second air pipe 41, and the gas in the second air pipe 41 is blown out through the second air port 42, so that the powder on the surface of the sample piece is blown off, and the cleanness of the grinding surface is ensured.

The positioning grooves 36 are three, the sizes of the three positioning grooves 36 are different and correspond to samples with different sizes, and the clamping plates 35 correspond to the positioning grooves 36 one to one.

As shown in fig. 10, a backing plate 44 is disposed in the positioning groove 36, a third through hole 45 is disposed on the backing plate 44, the first through holes 43 correspond to the third through holes 45 one by one, the lower end surface of the backing plate 44 is an arc surface, the arc surface of the lower end surface of the backing plate 44 is closely matched with the bottom end surface of the positioning groove 36, and the upper end surface of the backing plate 44 is a plane. When carrying out the first face grinding for the first time to the appearance spare, do not have backing plate 44 in the constant head tank 36, the arcwall face of appearance spare this moment and the arcwall face on constant head tank 36 ground closely laminate, and the appearance spare is fixed firm, and when reversing appearance spare, puts into backing plate 44 in constant head tank 36, and the one side that the appearance spare has ground flat closely laminates with backing plate 44 up end, and the appearance spare can not incline, and is fixed firm, improves the precision of sample, guarantees that the sample thickness is even.

As shown in fig. 8, a lead screw 46 is arranged on the side surface of the second positioning block 34, the lead screw 46 is rotatably connected with the side surface of the second positioning block 34 through a bearing, the lead screw 46 penetrates through the clamping plate 35 and is in threaded connection with the clamping plate 35, guide rods 47 are arranged on two sides of the lead screw 46, the guide rods 47 are in sliding connection with the clamping plate 35, the clamping plate 35 can be driven to move left and right along the guide rods 47 by rotating the lead screw 46, and thus clamping and loosening of the sample piece are achieved.

As shown in fig. 9, the second tuyere 42 is inclined downward, and the second tuyere 42 faces the grinding plane, increasing the wind utilization rate.

As shown in fig. 1 and 11, a plurality of second through holes 48 are formed in the supporting plate 2 at positions corresponding to the brake pad grinding mechanism, a hopper 49 is arranged at the lower end of the supporting plate 2, the second through holes 48 are communicated with the hopper 49, a second negative pressure fan 50 and a waste material box 51 are arranged below the supporting plate 2, the input end of the second negative pressure fan 50 is communicated with the lower end of the hopper 49, and the output end of the second negative pressure fan 50 is communicated with the waste material box 51. Compact structure, dust extraction device, reduce cost, no pollution to environment and no harm to operators.

In the description of the present invention, it should be noted that the terms "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be mechanically or electrically connected, directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims

1. The brake pad sampler is characterized by comprising a shell (1), wherein a support plate (2) is arranged in the shell, and a brake pad cutting mechanism and a brake pad grinding mechanism are arranged on the support plate (2);

the brake block cutting mechanism comprises a fixing mechanism and a cutting mechanism, the fixing mechanism and the cutting mechanism are installed on a supporting plate (2), the fixing mechanism comprises a first sliding plate (3), a second sliding plate (4) and a rotary plate (5), the first sliding plate (3) is in sliding connection with the supporting plate (2), the first sliding plate (3) is in sliding connection with the second sliding plate (4), the rotary plate (5) is in rotating connection with the second sliding plate (4), a first positioning block (7) is arranged on the rotary plate (5), a sliding block (8) is arranged in the first positioning block (7), the sliding block (8) slides in the first positioning block (7), the upper end of the sliding block (8) is matched with a brake block (9), a pressing plate (10) is arranged at the upper end of the first positioning block (7), a fixing pressure head (11) is arranged at the end part of the pressing plate (10), the lower end face of the fixing pressure head (11) is matched with the brake block (9), the cutting mechanism comprises a first motor (29) and a cutter (30), the first motor (29) is arranged on the supporting plate (2), and the cutter (30) is arranged on an output shaft of the first motor (29);

the brake pad grinding mechanism comprises a grinding mechanism and a positioning clamp, the grinding mechanism comprises a support frame (31) and a second motor (32), the lower end of the support frame (31) is connected with the support plate (2) in a sliding mode, the second motor (32) is connected with the support frame (31) in a sliding mode, an abrasive disc (33) is arranged at the output end of the second motor (32), the positioning clamp comprises a second positioning block (34) and a clamping plate (35), a positioning groove (36) is formed in the second positioning block (34), the lower end of the positioning groove (36) is an arc-shaped surface, and the clamping plate (35) is installed on the side face of the second positioning block (34);

the position that corresponds with brake block grinding mechanism on backup pad (2) is equipped with second through-hole (48), and backup pad (2) lower extreme is equipped with hopper (49), second through-hole (48) and hopper (49) intercommunication, backup pad (2) below is equipped with second negative-pressure air fan (50) and dump bin (51), and second negative-pressure air fan (50) input and hopper (49) intercommunication, second negative-pressure air fan (50) output and dump bin (51) intercommunication.

2. The brake pad sampling machine as claimed in claim 1, wherein the lower end surface of the fixed pressure head (11) is arc-shaped, the lower end of the pressure plate (10) is provided with a movable pressure head (12), the movable pressure head (12) is movably connected with the pressure plate (10), the lower end surface of the movable pressure head (12) is arc-shaped, the lower end surface of the movable pressure head (12) is matched with the brake pad (9), and the lower ends of the fixed pressure head (11) and the movable pressure head (12) are provided with rubber layers (13).

3. The brake pad sampler as claimed in claim 1, wherein the second slide plate (4) is provided with a fixing shaft (14) at a middle position, the fixing shaft (14) passes through the middle position of the rotating shaft, the upper end of the fixing shaft (14) is provided with a first baffle plate (15), and the first baffle plate (15) is connected with the upper end of the fixing shaft (14) through a screw.

4. The brake pad sampler as claimed in claim 1, wherein the cylindrical surface of the rotary disk (5) is provided with a positioning hole (16), the second sliding plate (4) is provided with a vertical plate (17), and a positioning mechanism is arranged between the vertical plate (17) and the second sliding plate (4).

5. A sampler for brake pads as claimed in claim 1, characterised in that the first positioning block (7) is provided with a recess (24) therein, the slide (8) being located in the recess (24), the slide (8) being slidably connected to the inner wall of the recess (24).

6. The brake pad sampling machine of claim 1, wherein a clamping groove (25) is formed on the outer side of the first positioning block (7), the clamping groove (25) is matched with the pressing plate (10), a compression nut (26) is arranged at the upper end of the pressing plate (10), and the compression nut (26) penetrates through the pressing plate (10) and then is in threaded connection with the upper end of the first positioning block (7).

7. The brake pad sampling machine of claim 1, wherein a cavity (37) is arranged in the second positioning block (34), a first negative pressure fan (38) is arranged on the supporting plate (2), the first negative pressure fan (38) is connected with the cavity (37) through a first air duct (39), a first air port (40) is arranged on the side surface of the positioning groove (36), a second air duct (41) is arranged at the upper end of the second positioning block (34), two ends of the second air duct (41) are communicated with the cavity (37), a second air port (42) is arranged on the second air duct (41), and a first through hole (43) is arranged at the lower end of the positioning groove (36).

8. The brake pad sampling machine of claim 1, wherein a backing plate (44) is arranged in the positioning groove (36), a third through hole (45) is arranged on the backing plate (44), the first through holes (43) and the third through holes (45) are in one-to-one correspondence, the lower end surface of the backing plate (44) is an arc-shaped surface, the arc-shaped surface of the lower end surface of the backing plate (44) is tightly matched with the bottom end surface of the positioning groove (36), and the upper end surface of the backing plate (44) is a plane.