CN203610781U

CN203610781U - Rivet cutting machine for truck brake shoes

Info

Publication number: CN203610781U
Application number: CN201320833228.XU
Authority: CN
Inventors: 罗涛波
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-18
Filing date: 2013-12-18
Publication date: 2014-05-28
Anticipated expiration: 2023-12-18

Abstract

The utility model discloses a rivet cutting machine for truck brake shoes. The rivet cutting machine comprises a brake shoe clamping mechanism, a cutting mechanism, a compressing mechanism and a machine frame. According to the rivet cutting machine, the brake shoe clamping mechanism, the cutting mechanism and the compressing mechanism are installed on the machine frame, the brake shoe clamping mechanism is used for clamping the brake shoes and enabling the brake shoes to conduct circular motion by using the center axis as the circle center, and the compressing mechanism is used for compressing a pick head of an electric pick in the cutting mechanism and utilizing rotation and left-right movement of the cutting mechanism on the machine frame for enabling cutting force of the electric pick to cut rivets in each row on the brake shoes one by one. The rivet cutting machine for the truck brake shoes is simple in structure, convenient to operate, capable of rapidly separating the rivets and friction plates from the shoes, and particularly applicable to the truck brake shoes with the diameter of a cutting brake drum working face being more than 400 mm, and saves time and labor.

Description

Lorry brake shoes rivet cutter

Technical field

The utility model belongs to lorry brake shoes utensil, relates in particular to a kind of lorry brake shoes rivet cutter.

Background technology

Lorry brake shoes is mainly made up of semicircular shoes and friction plate two parts, and friction plate passes through the rivet of some on the extrados of shoes.Along with the increase of the distance travelled of car body, the wear intensity of the friction plate on automobile brake shoe also, deepening, in the time reaching its maximum failure values, need to be changed shoes upper friction plate, to guarantee the safety in Vehicle Driving Cycle.At present, it is mainly to pass through rivet driver that the friction plate of this lorry brake shoes is changed, rivet is ejected in the installing hole of shoes and friction plate with its thimble, due in the time rivet being installed with riveting machine, the stress deformation amount of its end face is equal not to the utmost, after riveted, often form irregular compressive plane, this irregular compressive plane can make the thimble of rivet driver cannot aim at the installing hole of shoes and friction plate, not only can cause rivet in the installing hole of shoes and friction plate, to eject, also can cause the thimble of rivet driver to be stuck in the surface of shoes or friction plate, be difficult to extract, the thimble of infringement rivet driver, operation easier is large, operating efficiency is slow.And for that use rivet screw, friction plate is fixed on to the lorry brake shoes on shoes, cannot use rivet driver, can only be by cutting manually rivet, operation easier is larger, operating efficiency is lower, and cut the poor stability in process, once cut a hole askew very likely can cut a hole in operator's finger, cause the deformity on health to operator.

Utility model content

The purpose of this utility model is to provide a kind of lorry brake shoes rivet cutter can be automatically the friction plate in brake shoes and rivet being shifted out.

This lorry brake shoes rivet cutter that the utility model provides, comprise brake shoes clamp mechanism, cutting mechanism, hold-down mechanism and frame, described brake shoes clamp mechanism comprises base, two levers, for positioning seat and the two-way pneumatic pneumatic cylinder of brake shoes centralized positioning, described cutting mechanism comprises cutting rivet electric pick, mount pad, with the ball screw of handwheel, two screw mandrel holders, turning cylinder and locating shaft, on this locating shaft, cover has a sliding fiting sleeve, described hold-down mechanism comprises main depression bar, from depression bar, bidirectional slide wheel group, pulley base and pick axial restraint seat, describedly comprise vertical rod and the bottom guide post with gathering sill from depression bar, described bidirectional slide wheel group comprises the lower sheave axial arranged along pick and the top sheave perpendicular to this lower sheave, the center, top of described base is movably arranged on frame front end below by a rotating shaft, the rear and front end that is arranged on base of each described lever symmetry, described positioning seat is movably arranged on the rear end of base top, described two-way pneumatic pneumatic cylinder is arranged on base below and drives it to synchronize with the bottom-hinged of two levers and clamps to center, base top, described turning cylinder is rotatably mounted on the top, rear end of frame, described each screw mandrel holder is fixedly mounted on the two ends of turning cylinder, described ball screw is rotatably mounted between two screw mandrel holders, described locating shaft is fixed between two screw mandrel holders, described turning cylinder, ball screw and locating shaft are parallel to each other, described mount pad moves to be arranged on ball screw and with the sliding fiting sleeve on locating shaft by a nut seat and is fixedly connected with, described electric pick is being movably arranged on mount pad towards frame front end perpendicular to described ball screw and pick, described handwheel drives ball screw to rotarily actuate mount pad and electric pick moves left and right in frame, described pick axial restraint seat is arranged on the front end of mount pad, what described bidirectional slide wheel group can be overturn along the axis of pick being arranged on pick axial restraint seat, the end face of described lower sheave and pick joins, described vertical rod is arranged in frame by alignment pin is moving up and down, the turnover top that is arranged on vertical rod that described guide post parallels with ball screw, described top sheave can slide in the gathering sill of guide post, in the frame of the turnover installation of described main depression bar and vertical rod opposite side, also push down guide post downwards.

For making stability of the present utility model better, described two-way pneumatic pneumatic cylinder comprises cylinder body, two end cap, two seal isolation pads, two piston rods with chassis and main tracheae, there is a dividing plate in the center arrangement of described cylinder body, have a through hole at the center of dividing plate, described cylinder body is arranged on base below, described end cap is arranged on the two ends of described cylinder body, described seal isolation pad symmetry is arranged in the cylinder body of dividing plate both sides and is closely connected with the inwall of cylinder body, the chassis one side of described piston rod is connected with seal isolation pad, one side is connected with end cap inner side by a Compress Spring, one end of described piston rod clamps to center, base top through driving each lever to synchronize with the bottom-hinged of each lever after end cap, one end of described main tracheae is communicated with through hole through the outer wall of cylinder body, one end is communicated with a pulsometer by a switch valve.

For prevent piston rod stressed when extrapolation can and the junction on chassis between there is bending, between described chassis and piston rod, be welded with some reinforcements.

For making the lorry brake shoes of the utility model applicable to various fixed structures, described positioning seat comprises base plate and horizontally disposed cylinder in this base plate one side, or comprise base plate and the horizontally disposed cylinder at this base plate Yi Ceshang center, or comprise base plate and the centrosymmetric horizontally disposed cylindrical shell at these base plate one side two ends.

For making the kinetic stability of the utility model two-way pneumatic pneumatic cylinder better, described seal isolation pad adopts bowl-shape, and the bowl end and the dividing plate of sealing isolating pad join, and are provided with a secondary hole being communicated with main tracheae on the cylinder body below the lateral surface of sealing isolating pad.

For making electric pick of the present utility model stability of hold-down mechanism in working angles better, described hold-down mechanism also comprises a spring pressure cap, this spring pressure cap is by the guide rod guide post top joining with described main depression bar that is arranged on moving up and down, above this spring pressure cap, be provided with a groove, below the main depression bar corresponding with this groove, be provided with a supporting projection.

Convenient for the utility model is used, described electric pick is communicated with power supply by a point driving switch.

For making the utility model be more suitable for installing lorry brake shoes, have a positioning jack at described rotating shaft and frame corresponding position.

For convenience of the motion of piston rod, between described piston rod and end cap, adopt gap to be connected.

The utility model is by being arranged on brake shoes clamp mechanism, cutting mechanism, hold-down mechanism together in frame, by brake shoes clamp mechanism, brake shoes clamped and move in a circle as the center of circle take its central shaft, under at hold-down mechanism, the pick of electric pick presses in to cutting mechanism, utilize the rotation of cutting mechanism in frame and move left and right, the cutting force of electric pick is cut one by one to the each row's rivet in brake shoes.The utility model is simple in structure, easy to operate, time saving and energy saving, can fast rivet be separated from shoes with friction plate, is particularly useful for cutting 400 millimeters of above lorry brake shoes of brake drum working surface diameter.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation of the utility model two-way pneumatic pneumatic cylinder.

Fig. 3 is the structural representation of the utility model brake shoes clamp mechanism.

Fig. 4 is that in Fig. 1, sectional structure schematic diagram is overlooked in cutting mechanism part.

Fig. 5 is the structural representation one of the utility model positioning seat.

Fig. 6 is the structural representation two of the utility model positioning seat.

Fig. 7 is the structural representation three of the utility model positioning seat.

Fig. 8 is that sectional structure schematic diagram is amplified at Fig. 1 A place.

Fig. 9 is that sectional structure schematic diagram is amplified at Fig. 1 B place.

Figure 10 is that sectional structure schematic diagram is amplified at Fig. 1 C place.

Figure 11 is the structural representation of the utility model from depression bar.

The specific embodiment

From Fig. 1 to Fig. 4 and Figure 10, Figure 11 can find out, this lorry brake shoes rivet cutter of the utility model, comprises brake shoes clamp mechanism 1, cutting mechanism 2, hold-down mechanism 3 and frame 4, wherein brake shoes clamp mechanism 1 comprises base 11, two levers 12, positioning seat 13 and two-way pneumatic pneumatic cylinder 14, two-way pneumatic pneumatic cylinder 14 comprises cylinder body 141, two end cap 142, two seal isolation pads 143, two piston rods 145 with chassis 144 and main tracheae 146, there is a dividing plate 147 in the center arrangement of cylinder body 141, have a through hole 148 at dividing plate 147 center, be welded with some reinforcements 1441 between chassis 144 and piston rod 145, cutting mechanism 2 comprises cutting electric pick 21 for rivet, mount pad 22, ball screw 23 with handwheel 24, two screw mandrel holders 25, turning cylinder 26 and locating shaft 28, on this locating shaft 28, cover has a sliding fiting sleeve 281, and hold-down mechanism 3 comprises main depression bar 31, from depression bar 32, bidirectional slide wheel group 33, pulley base 34 and pick axial restraint seat 35, comprise vertical rod 321 and the bottom guide post 322 with gathering sill from depression bar 32, and bidirectional slide wheel group 33 comprises lower sheave 331 and the top sheave 332 perpendicular to this lower sheave.

From Fig. 1, Fig. 2 and Fig. 3 can find out, the center, top of base 11 of the present utility model can be by its central rotation by a rotating shaft 15 being arranged on frame 4 front ends belows, the rear and front end that is arranged on base 11 of each lever 12 symmetries, positioning seat 13 is arranged on the rear end of base 11 tops by some bolts, cylinder body 141 is arranged on base 11 belows by some bolts, end cap 142 is arranged on the rear and front end of cylinder body 141, seal isolation pad 143 symmetries are arranged in the cylinder body 141 of dividing plate 147 both sides and are closely connected with the inwall of cylinder body 141, chassis 144 one sides of piston rod 145 are connected with seal isolation pad 143, one side is connected with end cap inner side by a Compress Spring 149, one end of piston rod 145 is connected with the bottom of each lever 12 by hinge through after end cap 142, between this piston rod 145 and end cap 142, adopt gap to be connected, one end of main tracheae 146 is communicated with through hole 148 through the outer wall of cylinder body 141, one end is communicated with pulsometer 1462 by a switch valve 1461

From Fig. 1, Fig. 4 and Figure 10 can find out, turning cylinder 26 of the present utility model rotates the top, rear end that is installed on frame 4 by bearing block, each screw mandrel holder 25 is fixedly mounted on the two ends of turning cylinder 26, ball screw 23 can axial-rotation be arranged between two screw mandrel holders 25, locating shaft 28 is fixed between two screw mandrel holders 25, turning cylinder 26, ball screw 23 and locating shaft 28 are parallel to each other, mount pad 22 is arranged on the ball screw 23 between two screw mandrel holders 25 and with the sliding fiting sleeve 281 on locating shaft 28 and is fixedly connected with by a nut seat of bottom, electric pick 21 perpendicular to ball screw and pick towards frame front end can axial-rotation be arranged on mount pad 22, electric pick 21 is communicated with power supply by a point driving switch 27.

From Fig. 1, Fig. 4 and Figure 11 can find out, pick axial restraint seat 35 of the present utility model is arranged on the front end of mount pad 22 and adopts the structure of two-piece unit one side upset, bidirectional slide wheel group 33 is arranged on pick axial restraint seat 35 tops and can be overturn along the axis of pick by bearing pin, lower sheave 331 joins with the end face of pick, be provided with an outer loop bar in frame one side, even and correspondingly on the outer loop bar of vertical rod 321 and this be provided with some through holes, vertical rod 321 is inserted moving up and down being arranged in frame in corresponding through hole by alignment pin, guide post 322 is arranged on the top of vertical rod 321 and parallels with ball screw 23 by a rotating shaft is turnover, top sheave 332 joins and can in gathering sill, slide with the gathering sill inner face of guide post 322, main depression bar 31 is by also pushing down this side upper surface of guide post 322 downwards on the turnover opposite side that is arranged on the frame relative with vertical rod 4 of a latch.

As can be seen from Figure 5, positioning seat 13 of the present utility model comprises base plate 131 and horizontally disposed cylinder 132 in these base plate 131 1 sides.

As can be seen from Figure 6, positioning seat 13 of the present utility model comprises base plate 131 and the horizontally disposed cylinder 133 at this base plate 131Yi Ceshang center.

As can be seen from Figure 7, positioning seat 13 of the present utility model comprises base plate 131 and the centrosymmetric horizontally disposed cylindrical shell 134 at these base plate 131 1 side two ends.

It can also be seen that from Fig. 2, seal isolation pad 143 of the present utility model adopts bowl type, and the bowl end and the dividing plate 147 of sealing isolating pad 143 join, and are provided with a secondary hole 140 being communicated with main tracheae 146 on the cylinder body 141 below the lateral surface of sealing isolating pad 143.

It can also be seen that from Fig. 1 and Fig. 8, hold-down mechanism 3 of the present utility model also comprises a spring pressure cap 37, be provided with a guide groove 373 what join with main depression bar 31 from depression bar 32, be provided with a guide rod 374 in the bottom centre of spring pressure cap 37, spring pressure cap 37 by lead move up and down after 374 insertion guide grooves 373 be arranged on the top of this side from depression bar 32, above this spring pressure cap 37, be provided with a groove 371, below the main depression bar 31 corresponding with this groove 371, be provided with a supporting projection 372.

It can also be seen that from Fig. 1, electric pick 21 of the present utility model is communicated with power supply by a point driving switch 27, and this point driving switch 27 is arranged on the frame lower end of electric pick below.

It can also be seen that from Fig. 1 and Fig. 3, be connected with one handle 151 in one end of the utility model rotating shaft 15.

It can also be seen that from Fig. 9, have a positioning jack communicating 41 in the utility model rotating shaft 15 and the corresponding position of frame 4.

Operating process of the present utility model is as follows:

1, holding handle 151 rotates its driven rotary axle 15, this rotating shaft 15 drives the central rotation of base 11 around its top, in the time that rotating shaft 15 is communicated with the corresponding position positioning jack 41 of frame 4, insert a bearing pin in this positioning jack 41, the upper surface of base 11 rotates to specific bit; This specific bit can be determined the particular location of positioning jack 41 openings according to user, and the upper surface of ordinary circumstance lower bottom base 11 rotates to level upwards better.

2, choose the positioning seat 13 matching with each brake shoes, be arranged on base 11 tops, rear end, as the employing of steyr brake shoes stiff end is semicircle, use base plate 131 as shown in Figure 5 and the positioning seat 13 of horizontally disposed cylinder 132 in these base plate 131 1 sides, and the stiff end of such brake shoes is directly positioned on cylinder 132; What the stiff end of brake shoes as used in Huayang ten threeton truck rear brakes adopted is the cylindrical shell that two ends are arranged symmetrically with, use base plate 131 as shown in Figure 6 and the positioning seat 13 of the horizontally disposed annulus 133 at this base plate 131Yi Ceshang center, and the stiff end of such brake shoes is positioned on to annulus 133 two ends, insert a bearing pin and fix; As east wind 153 brake shoes stiff ends employings are central tube bodily forms, use base plate 131 as shown in Figure 7 and the positioning seat 13 of the centrosymmetric horizontally disposed cylindrical shell 134 at these base plate 131 1 side two ends, and the stiff end of such brake shoes is positioned between two cylindrical shells 134, insert a bearing pin and fix.

3, rotary switch valve 1461, make pulsometer 1462 by main tracheae 146, via through holes 148 and secondary hole 140 are simultaneously to inflation between each seal isolation pad 143 and dividing plate 147, under the impetus of air pressure, seal isolation pad 143 progressively promotes another side joins with it chassis 144 and piston rod 145 to the outer side shifting of cylinder body 141, piston rod 145 drives the bottom of each lever 12 around its axle center rotation, synchronously move to base 11 centers, top the upper end of each lever 12, until clamped with two end in contact of lorry brake shoes.

4, pull handwheel 24, ball screw 23, screw mandrel holder 25 and locating shaft 28 are overturn in frame 4 with turning cylinder 26, the pick top of electric pick 21 and the outer surface of brake shoes are joined, upset bidirectional slide wheel group 33, lower sheave 331 and the end face of pick are joined, regulate from the height of depression bar 32 top sheave 332 and the gathering sill inner face of guide post 322 are joined.

5, rotation hand wheel 24, ball screw 23 is rotated, drive installation seat 22 and electric pick 21 are along ball screw 23 and locating shaft 28 axis to frame 4 one side shiftings, top sheave 332 slides in the gathering sill of guide post 322, and the row's rivet that makes the pick top of electric pick 21 and lorry brake shoes outermost concentric is on same straight line and withstand between friction plate and shoes.

6, rotary handle 151, joins the stiff end of lorry brake shoes and the pick top of electric pick 21; Rotate main depression bar 31, coordinate with groove 371 by projection 372, make it push down guide post 322 downwards, allow the pick of electric pick 21 closely be connected with the shoes of lorry brake shoes.

7, open motor switch 27, the pick of electric pick 21 does reciprocating linear motion along its central shaft; Rotary handle 151, the stiff end that makes lorry brake shoes, towards the pick of electric pick 21 to rotation, until one end relative with the stiff end of this lorry brake shoes is complete with the pick contact of electric pick 21, under the high-rate cutting of electric pick 21, completes shifting out this row's rivet.

8, rotation hand wheel 24, ball screw 23 is rotated, drive installation seat 22 and electric pick 21 move to frame 4 opposite sides along ball screw 23 and locating shaft 28 axis, top sheave 332 slides in the gathering sill of guide post 322, make the pick top of electric pick 21 and adjacent with upper row's rivet row's rivet on same straight line and withstand between friction plate and shoes, and repeat previous step, complete shifting out of this row's rivet.

9, repeat previous step, all be cut until respectively arrange rivet, rotary switch valve 1461, gas between each seal isolation pad 143 and dividing plate 147, via through holes 148 and secondary hole 140 are emitted by main tracheae 146, promoting seal isolation pad 143 at the effect low bottom-disc 144 of Compress Spring 149 and piston rod 145 moves to it and joins to dividing plate 147, piston rod 145 drives the bottom of each lever 12 around its axle center reverse rotation, the upper end of each lever 12 is synchronously away from base 11 centers, top, to can freely taking out lorry brake shoes.

10, lorry brake shoes is taken off from positioning seat 13, pat gently the broken end rivet remaining on shoes, broken end rivet easily falls, and completes whole working angles.

Claims

1. a lorry brake shoes rivet cutter, it is characterized in that: this cutter comprises brake shoes clamp mechanism (1), cutting mechanism (2), hold-down mechanism (3) and frame (4), described brake shoes clamp mechanism (1) comprises base (11), two levers (12), for positioning seat (13) and the two-way pneumatic pneumatic cylinder (14) of brake shoes centralized positioning, described cutting mechanism (2) comprises cutting electric pick (21) for rivet, mount pad (22), the ball screw (23) of band handwheel (24), two screw mandrel holders (25), turning cylinder (26) and locating shaft (28), there is a sliding fiting sleeve (281) at the upper cover of this locating shaft (28), described hold-down mechanism (3) comprises main depression bar (31), from depression bar (32), bidirectional slide wheel group (33), pulley base (34) and pick axial restraint seat (35), describedly comprise vertical rod (321) and the bottom guide post (322) with gathering sill from depression bar (32), described bidirectional slide wheel group (33) comprises the lower sheave axial arranged along pick (331) and the top sheave (332) perpendicular to this lower sheave, the center, top of described base (11) is movably arranged on frame (4) front end below by a rotating shaft (15), the rear and front end that is arranged on base (11) that each described lever (12) is symmetrical, described positioning seat (13) is movably arranged on the rear end of base (11) top, described two-way pneumatic pneumatic cylinder (14) is arranged on base (11) below and drives it to synchronize with the bottom-hinged of two levers (12) and clamps to center, base (11) top, described turning cylinder (26) is rotatably mounted on the top, rear end of frame (4), described each screw mandrel holder (25) is fixedly mounted on the two ends of turning cylinder (26), described ball screw (23) is rotatably mounted between two screw mandrel holders (25), described locating shaft (28) is fixed between two screw mandrel holders (25), described turning cylinder (26), ball screw (23) and locating shaft (28) are parallel to each other, described mount pad (22) is moved and is arranged on ball screw (23) above and is fixedly connected with the sliding fiting sleeve (281) on locating shaft (28) by a nut seat, described electric pick (21) is being movably arranged on mount pad (22) towards frame front end perpendicular to described ball screw (23) and pick, described handwheel (24) drives ball screw (23) to rotarily actuate mount pad (22) and electric pick (21) moves left and right in frame (4), described pick axial restraint seat (35) is arranged on the front end of mount pad (22), what described bidirectional slide wheel group (33) can be overturn along the axis of pick being arranged on pick axial restraint seat (35), described lower sheave (331) joins with the end face of pick, described vertical rod (321) is arranged in frame by alignment pin is moving up and down, the turnover top that is arranged on vertical rod (321) that described guide post (322) parallels with ball screw (23), described top sheave (332) can slide in the gathering sill of guide post (322), the upper guide post (322) of also pushing down downwards of frame (4) of the turnover installation of described main depression bar (31) and vertical rod (321) opposite side.

2. lorry brake shoes rivet cutter according to claim 1, it is characterized in that: described two-way pneumatic pneumatic cylinder (14) comprises cylinder body (141), two end cap (142), two seal isolation pads (143), two piston rods with chassis (144) (145) and main tracheae (146), there is a dividing plate (147) in the center arrangement of described cylinder body (141), have a through hole (148) at the center of dividing plate (147), described cylinder body (141) is arranged on base (11) below, described end cap (142) is arranged on the two ends of described cylinder body (141), described seal isolation pad (143) symmetry is arranged in the cylinder body (141) of dividing plate (147) both sides and is closely connected with the inwall of cylinder body (141), chassis (144) one side of described piston rod (145) is connected with seal isolation pad (143), one side is connected with end cap inner side by a Compress Spring (149), one end of described piston rod (145) clamps to center, base (11) top through driving each lever to synchronize with the bottom-hinged of each lever (12) after end cap (142), one end of described main tracheae (146) is communicated with through hole (148) through the outer wall of cylinder body (141), one end is communicated with a pulsometer (1462) by a switch valve (1461).

3. lorry brake shoes rivet cutter according to claim 2, is characterized in that: between described chassis (144) and piston rod (145), be welded with some reinforcements (1441).

4. lorry brake shoes rivet cutter according to claim 1, it is characterized in that: described positioning seat (13) comprises base plate (131) and horizontally disposed cylinder (132) in these base plate (131) one sides, or comprise base plate (131) and the horizontally disposed cylinder (133) at this base plate (131) Yi Ceshang center, or comprise base plate (131) and the centrosymmetric horizontally disposed cylindrical shell (134) at these base plate (131) one side two ends.

5. lorry brake shoes rivet cutter according to claim 2, it is characterized in that: described seal isolation pad (143) adopts bowl-shape, the bowl end and the dividing plate (147) of sealing isolating pad (143) join, and on the cylinder body (141) below the lateral surface of sealing isolating pad (143), are provided with a secondary hole (140) being communicated with main tracheae (146).

6. lorry brake shoes rivet cutter according to claim 1, it is characterized in that: described hold-down mechanism (3) also comprises a spring pressure cap (37), this spring pressure cap (37) is by guide rod guide post (322) top joining with described main depression bar (31) that is arranged on moving up and down, be provided with a groove (371) in this spring pressure cap (37) top, be provided with a supporting projection (372) in main depression bar (31) below corresponding with this groove (371).

7. lorry brake shoes rivet cutter according to claim 1, is characterized in that: described electric pick (21) is communicated with power supply by a point driving switch (27).

8. lorry brake shoes rivet cutter according to claim 1, is characterized in that: be connected with one handle (151) in one end of described rotating shaft (15).

9. lorry brake shoes rivet cutter according to claim 1, is characterized in that: have a positioning jack (41) in described rotating shaft (15) and frame (4) corresponding position.

10. lorry brake shoes rivet cutter according to claim 2, is characterized in that: between described piston rod (145) and end cap (142), adopt gap to be connected.