Grinding mechanism of disc type grinding machine

Abstract

The utility model discloses a polishing mechanism of a disc type polisher, which comprises a mounting plate, a front-back displacement component and a three-disc type polishing component, the front-back displacement component is fixedly mounted on the mounting plate, and the three-disc type polishing component is fixedly mounted on the front-back displacement component and moves back and forth along with the front-back displacement component. The front-back displacement assembly is arranged to drive the three-disc type grinding assembly and the tool setting assembly to move front and back; disks of the first disk type grinding assembly, the second disk type grinding assembly and the third disk type grinding assembly are staggered and overlapped, so that the space is greatly saved, abrasive paper is convenient to replace, and the abrasive paper replacement convenience is improved; two multi-wedge belts are used for mutual transmission, and a grinding motor is used for driving the three discs to rotate and grind; and the tool setting assembly is arranged and used for interpolating a datum point, touching the surface of a finished product and conducting datum correction, and multi-dimensional precise grinding on the workpiece is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a grinding mechanism of a disc type grinder. Background Art

[0002] The existing grinding mechanism is equipped with a small number of grinding discs and the disc structure design is unreasonable, which is inconvenient to use. Application No. 202211014066.7 A cutting knife grinding and cleaning device discloses a disc-holding grinding wheel grinding structure that can grind cutting knives of different models and thicknesses, including a main frame, a power shaft, an upper grinding disc device, and a lower grinding disc device. The upper grinding disc device is mounted on the top of the main frame, and the lower grinding disc device is mounted on the bottom. The power shaft is serially connected to the upper grinding disc device and the lower grinding disc device. The upper grinding disc device and the lower grinding disc device are provided with grinding wheel discs on the grinding wheel. Although the technical solution is provided with upper and lower grinding discs, the position setting of the grinding disc still occupies a large space, which is not convenient for replacing the grinding wheel. The number of discs is small, which is not convenient for multi-dimensional precision grinding. Utility Model Content

[0003] The utility model aims to provide a grinding mechanism for a disc grinder.

[0004] According to one aspect of the utility model, a grinding mechanism of a disc grinder is provided, comprising a mounting plate, a front-and-rear displacement assembly and a three-disc grinding structure, wherein the front-and-rear displacement assembly is fixedly mounted on the mounting plate, the three-disc grinding structure is fixedly mounted on the front-and-rear displacement assembly and moves forward and backward with the front-and-rear displacement assembly, the front-and-rear displacement assembly comprises a first base plate, a linear motion module, a connecting plate, a first slider group and a first slide rail group, the first base plate is fixedly mounted on the mounting plate, the linear motion module and the first slider group are fixedly mounted on the first base plate, the first slider group comprises two pairs of first sliders, the two pairs of first sliders are respectively located on the left and right sides of the linear motion module, the first slide rail group comprises two first slide rails, the two first slide rails are respectively located on the left and right sides of the linear motion module, and are respectively slidably connected with the two pairs of first sliders in a one-to-one correspondence.

[0005] In some embodiments, the linear motion module includes a linear motion motor, a motor seat, a coupling, a ball screw, a ball screw sleeve and a limit block. The motor seat and the limit block are fixedly mounted on the first base plate, the linear motion motor is fixedly mounted on the motor seat, one end of the coupling is connected to the output end shaft of the linear motion motor, and the other end is connected to the ball screw shaft, the other end of the ball screw is rotatably connected to the limit block, and the connecting plate is located above the ball screw sleeve and the first slide rail group, and is fixedly connected to the ball screw sleeve and the first slide rail group.

[0006] In some embodiments, the three-disc grinding structure includes a second base plate, a grinding motor, a driving wheel, a first transmission belt, a second transmission belt, a third transmission belt, a first disc grinding assembly, a first driven wheel, a second driven wheel, a second disc grinding assembly, a third driven wheel, a fourth driven wheel, a third disc grinding assembly and a fifth driven wheel, the grinding motor and the second base plate are both fixedly mounted on the connecting plate, the first disc grinding assembly, the second disc grinding assembly and the third disc grinding assembly are fixedly mounted on the second base plate from right to left in sequence, the driving wheel is sleeved on the output end of the grinding motor and connected to the output end of the grinding motor, the first driven wheel and the second driven wheel are both sleeved on the first disc grinding assembly and connected to the first disc grinding assembly, the first driven wheel is located on the outside of the second driven wheel, and the first transmission belt tensioning sleeve is sleeved on the driving wheel and the first driven wheel.

[0007] In some embodiments, the third driven wheel and the fourth driven wheel are arranged on the second disc grinding assembly and connected to the second disc grinding assembly, the third driven wheel and the second driven wheel are located on the same straight line, the second transmission belt tensioning sleeve is arranged on the second driven wheel and the third driven wheel, the fifth driven wheel is arranged on the third disc grinding assembly and connected to the third disc grinding assembly, the fifth driven wheel and the fourth driven wheel are located on the same straight line, and the third transmission belt tensioning sleeve is arranged on the fourth driven wheel and the fifth driven wheel.

[0008] In some embodiments, the first disc grinding assembly includes a transmission shaft, a sleeve and a disc. The sleeve is fixedly mounted on the second base plate. The transmission shaft passes through the sleeve. One end of the transmission shaft is connected to the first driven wheel and the second driven wheel, and the other end is connected to the disc. Sandpaper is installed on the disc.

[0009] In some embodiments, the structures of the second disc-type grinding assembly and the third disc-type grinding assembly are the same as the structure of the first disc-type grinding assembly, one end of the transmission shaft of the second disc-type grinding assembly is connected to the third driven wheel and the fourth driven wheel in sequence, one end of the transmission shaft of the third disc-type grinding assembly is connected to the fifth driven wheel, the disc of the second disc-type grinding assembly is located behind the disc of the first disc-type grinding assembly, and the disc of the third disc-type grinding assembly is located behind the disc of the second disc-type grinding assembly.

[0010] In some embodiments, the three-disc grinding structure also includes a first pressure roller assembly and a second pressure roller assembly, the first pressure roller assembly is located between the first disc grinding assembly and the second disc grinding assembly, and is fixedly mounted on the second base plate, the second pressure roller assembly is located between the second disc grinding assembly and the third disc grinding assembly, and is fixedly mounted on the connecting plate, the first pressure roller assembly includes a support rod, a pressure roller and a wheel axle, the support rod is provided with a mounting hole, one end of the wheel axle is clamped in the mounting hole and is bolted to the support rod, the pressure roller is sleeved at the other end of the wheel axle and is connected to the wheel axle, the pressure roller of the first pressure roller assembly is located above the second transmission belt and is in contact with the second transmission belt, the structure of the second pressure roller assembly is the same as that of the first pressure roller assembly, and its pressure roller is located above the third transmission belt and is in contact with the third transmission belt.

[0011] In some embodiments, the utility model also includes a tool setting assembly, which includes a third base plate, a support plate, a second slide rail, a second slider, a third slider, a sliding plate, a spring, a front baffle, a rear baffle and a tool setting device. The third base plate is fixedly mounted on the second base plate and is located on the outside of the third disc grinding assembly. The support plate is vertically mounted on the third base plate. The front baffle and the rear baffle are respectively fixedly mounted on the front and rear ends of the support plate. The second slide rail is fixedly mounted on the support plate and is located between the front baffle and the rear baffle. The second slider and the third slider are both fixedly mounted on the sliding plate and slidably connected to the second slide rail. A spring hole is provided at one end of the sliding plate, and a tool setting device is installed at the other end. One end of the spring is fixedly mounted in the spring hole, and the other end is fixedly connected to the rear baffle.

[0012] In some embodiments, the tool setting assembly also includes a protective shell, a limiter and a limiter plate. The limiter plate is fixedly installed below the sliding plate. The second sliding block is close to the tool setting device and is located above the limiter plate. The limiter is fixedly installed on the support plate, and its top end abuts against the limiter plate. The protective shell is sleeved on the outside of the support plate, the sliding plate, the front baffle plate and the rear baffle plate, and the top end of the tool setting device extends out of the protective shell.

[0013] The beneficial effects of the utility model are as follows: the utility model arranges a front and rear displacement assembly to drive the three-disc grinding structure and the tool setting assembly to move forward and backward; the discs of the first disc grinding assembly, the second disc grinding assembly and the third disc grinding assembly are arranged to be staggered and stacked, which greatly saves space, facilitates the replacement of sandpaper, and improves the convenience of replacing sandpaper; a multi-V belt is adopted for mutual transmission in twos, and a grinding motor is used to drive the three discs to rotate and grind; a spring-type tool setting assembly is arranged for interpolating reference points, touching the surface of the finished part, and performing reference calibration, so as to facilitate multi-dimensional precision grinding of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is an exploded view of a grinding mechanism of a disc grinder according to an embodiment of the present invention.

[0015] Figure 2 The present invention is a schematic structural diagram of a grinding mechanism of a disc grinder according to an embodiment of the present invention.

[0016] Figure 3 It is a structural schematic diagram of a forward and backward moving component of a grinding mechanism of a disc grinder according to an embodiment of the utility model.

[0017] Figure 4 An exploded view of a three-disc grinding structure of a grinding mechanism of a disc grinder according to an embodiment of the utility model.

[0018] Figure 5 It is a top view of a three-disc grinding structure of a grinding mechanism of a disc grinder according to an embodiment of the utility model.

[0019] Figure 6 It is an exploded view of a first disc grinding component of a three-disc grinding structure of a grinding mechanism of a disc grinder according to an embodiment of the utility model.

[0020] Figure 7 The utility model is an exploded view of a tool setting assembly of a grinding mechanism of a disc grinder according to an embodiment of the utility model.

[0021] Figure 8 The present invention is a schematic structural diagram of a tool setting assembly of a grinding mechanism of a disc grinder according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the embodiments.

[0023] refer to Figures 1 to 8 The utility model provides a grinding mechanism of a disc grinder, comprising a mounting plate 1, a front-rear displacement assembly 2, a three-disc grinding structure 3 and a tool setting assembly 5.

[0024] The front-rear displacement assembly 2 includes a first base plate 21, a linear motion module 22, a connecting plate 23, a first slider group and a first slide rail group. The first base plate 21 is fixedly mounted on the mounting plate 1, and the first slider group is fixedly mounted on the first base plate 21. The first slider group includes two pairs of first sliders 241, which are respectively located on the left and right sides of the linear motion module 22. The first slide rail group includes two first slide rails 251, which are respectively located on the left and right sides of the linear motion module 22, and are slidably connected to the two pairs of first sliders 241 in a one-to-one correspondence.

[0025] The linear motion module 22 includes a linear motion motor 221, a motor seat 222, a coupling 223, a ball screw 224, a ball screw sleeve 225 and a limit block 226. The motor seat 222 and the limit block 226 are fixedly mounted on the first base plate 21, and the linear motion motor 221 is fixedly mounted on the motor seat 222. One end of the coupling 223 is connected to the output end shaft of the linear motion motor 221, and the other end is connected to the shaft of the ball screw 224. The other end of the ball screw 224 is rotatably connected to the limit block 226. The connecting plate 23 is located above the ball screw sleeve 225 and the first slide rail group, and is fixedly connected to the ball screw sleeve 225 and the first slide rail group. The ball screw sleeve 225 drives the connecting plate 23 to move forward and backward along the ball screw 224.

[0026] The three-disc grinding structure 3 includes a second base plate 31, a grinding motor 32, a driving wheel 33, a first transmission belt 34, a second transmission belt 35, a third transmission belt 36, a first disc grinding assembly 37, a first driven wheel 38, a second driven wheel 39, a second disc grinding assembly 40, a third driven wheel 41, a fourth driven wheel 42, a third disc grinding assembly 43, a fifth driven wheel 44, a first pressure roller assembly 45 and a second pressure roller assembly 46.

[0027] The grinding motor 32 and the second base plate 31 are both fixedly mounted on the connecting plate 23. The first disc grinding assembly 37, the second disc grinding assembly 40 and the third disc grinding assembly 43 are fixedly mounted on the second base plate 31 from right to left in sequence. The driving wheel 33 is sleeved on the output end of the grinding motor 32 and connected to the output end of the grinding motor 32. The first driven wheel 38 and the second driven wheel 39 are both sleeved on the transmission shaft 371 of the first disc grinding assembly 37 and connected to the transmission shaft 371 of the first disc grinding assembly 37. The first driven wheel 38 is located on the outer side of the second driven wheel 39, and the first transmission belt 34 is tensioned and sleeved on the driving wheel 33 and the first driven wheel 38. When the grinding motor 32 is started, the driving wheel 33 rotates and drives the first driven wheel 38 to rotate through the first transmission belt 34. The first driven wheel 38 drives the transmission shaft 371 of the first disc grinding assembly 37 to rotate, and then drives the disc 373 and the second driven wheel 39 to rotate.

[0028] The third driven wheel 41 and the fourth driven wheel 42 are arranged on the transmission shaft of the second disc-type grinding assembly 40 and are connected to the transmission shaft of the second disc-type grinding assembly 40. The third driven wheel 41 and the second driven wheel 42 are located on the same straight line, and the second transmission belt 35 is tensionedly sleeved on the second driven wheel 39 and the third driven wheel 41. The second driven wheel 39 rotates, driving the third driven wheel 41 to rotate, thereby driving the disc of the second disc-type grinding assembly 40 and the fourth driven wheel 42 to rotate. The fifth driven wheel 44 is arranged on the transmission shaft of the third disc-type grinding assembly 43 and is connected to the transmission shaft of the third disc-type grinding assembly 43. The fifth driven wheel 44 and the fourth driven wheel 42 are located on the same straight line, and the third transmission belt 36 is tensionedly sleeved on the fourth driven wheel 42 and the fifth driven wheel 44. The fourth driven wheel 42 rotates, driving the fifth driven wheel 44 to rotate, thereby driving the disc of the third disc-type grinding assembly 43 to rotate. The first transmission belt 34 , the second transmission belt 35 and the third transmission belt 36 are all poly-V belts.

[0029] The first disc-type grinding assembly 37 includes a transmission shaft 371, a sleeve 372 and a disc 373. The sleeve 372 is fixedly mounted on the second bottom plate 31. The transmission shaft 371 passes through the sleeve 372, one end of which is connected to the first driven wheel 39 and the second driven wheel 39, and the other end is connected to the disc 373. Sandpaper is installed on the disc 373. When the disc 373 rotates, the sandpaper on the disc 373 is driven to rotate, thereby grinding the workpiece.

[0030] The structures of the second disc-type grinding assembly 40 and the third disc-type grinding assembly 43 are the same as the structure of the first disc-type grinding assembly 37. The disc 373 of the second disc-type grinding assembly 40 is located behind the disc 373 of the first disc-type grinding assembly 37. The disc 373 of the third disc-type grinding assembly 43 is located behind the disc 373 of the second disc-type grinding assembly 40.

[0031] The first belt-pressing roller assembly 45 is located between the first disc-type grinding assembly 37 and the second disc-type grinding assembly 40, and is fixedly mounted on the second base plate 31. The second belt-pressing roller assembly 46 is located between the second disc-type grinding assembly 40 and the third disc-type grinding assembly 43, and is fixedly mounted on the connecting plate 23. The first belt-pressing roller assembly 45 comprises a support rod 451, a belt-pressing roller 452 and a wheel shaft 453. The support rod 451 is provided with a mounting hole 454, and one end of the wheel shaft 453 is clamped in the mounting hole 454 and is bolted to the support rod 451. The belt-pressing roller 452 is sleeved on the other end of the wheel shaft 453 and is connected to the wheel shaft 453. The belt-pressing roller 452 of the first belt-pressing roller assembly 45 is located above the second transmission belt 35 and contacts the second transmission belt 35. The structure of the second belt-pressing roller assembly 46 is the same as that of the first belt-pressing roller assembly 45, and its belt-pressing roller 452 is located above the third transmission belt 36 and contacts the third transmission belt 36. The belt pressure roller 452 of the first belt pressure roller assembly 45 and the belt pressure roller 453 of the second belt pressure roller assembly 46 are used to press the second transmission belt 35 and the third transmission belt 36 respectively to prevent the second transmission belt 35 and the third transmission belt 36 from falling off.

[0032] The tool setting assembly 5 includes a third bottom plate 51, a support plate 52, a second slide rail 53, a second slider 54, a third slider 55, a sliding plate 56, a spring 57, a front baffle plate 58, a rear baffle plate 59, a tool setting device 60, a protective shell 61, a stopper 62 and a stopper plate 63. The third bottom plate 51 is fixedly mounted on the second bottom plate 31 and is located outside the third disc grinding assembly 43.

[0033] The support plate 52 is vertically mounted on the third bottom plate 51, and the front baffle 58 and the rear baffle 59 are fixedly mounted on the front and rear ends of the support plate 52, respectively. The second slide rail 53 is fixedly mounted on the support plate 52 and is located between the front baffle 58 and the rear baffle 59. The second slider 54 and the third slider 55 are both fixedly mounted on the slide plate 56 and slidably connected to the second slide rail 53. One end of the slide plate 56 is provided with a spring hole, and the other end is provided with a tool setting device 60. One end of the spring 57 is fixedly mounted in the spring hole, and the other end is fixedly connected to the rear baffle 59.

[0034] The limit plate 63 is fixedly installed below the sliding plate 56. The second slider 54 is close to the tool setting device 60 and is located above the limit plate 63. The limit member 62 is fixedly installed on the support plate 52, with its top end abutting against the limit plate 63, and its bottom end passing through the third bottom plate 51. The protective shell 61 is sleeved on the outside of the support plate 52, the sliding plate 56, the front baffle plate 58 and the rear baffle plate 59. The top of the tool setting device 60 extends out of the protective shell 61. The top of the tool setting device 60 is pointed, and the spring 57 is in an extended state. When the tool setting assembly 5 is working, driven by the clamp, the finished part moves to the tip of the tool setting device 60. The finished part abuts against the tool setting device 60, applies pressure to the sliding plate 56, and the sliding plate 56, the second slider 54, and the third slider 55 move backward along the second slide rail 53 to compress the spring 57. The fixture drives the finished part to move, and the tip of the tool setting device 69 moves along the machining marks on the finished part. The sensor records the moving route and angle of the fixture, generates machining operation instructions, and thus obtains the machining parameters for the workpiece. After replacing the new unprocessed material, the machining operation can be directly carried out to obtain a finished part that meets the requirements.

[0035] The above are only some embodiments of the present invention. For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A grinding mechanism of a disc grinder, characterized in that: It includes a mounting plate, a front-to-back displacement component and a three-disc grinding structure, wherein the front-to-back displacement component is fixedly mounted on the mounting plate, the three-disc grinding structure is fixedly mounted on the front-to-back displacement component and moves forward and backward with the front-to-back displacement component, the front-to-back displacement component includes a first base plate, a linear motion module, a connecting plate, a first slider group and a first slide rail group, the first base plate is fixedly mounted on the mounting plate, the linear motion module and the first slider group are fixedly mounted on the first base plate, the first slider group includes two pairs of first sliders, the two pairs of first sliders are respectively located on the left and right sides of the linear motion module, the first slide rail group includes two first slide rails, the two first slide rails are respectively located on the left and right sides of the linear motion module, and are respectively slidably connected with the two pairs of first sliders in a one-to-one correspondence.

2. The grinding mechanism of a disc grinder according to claim 1, characterized in that: The linear motion module includes a linear motion motor, a motor seat, a coupling, a ball screw, a ball screw sleeve and a limit block. The motor seat and the limit block are fixedly mounted on the first base plate. The linear motion motor is fixedly mounted on the motor seat. One end of the coupling is connected to the output end shaft of the linear motion motor, and the other end is connected to the ball screw shaft. The other end of the ball screw is rotatably connected to the limit block. The connecting plate is located above the ball screw sleeve and the first slide rail group, and is fixedly connected to the ball screw sleeve and the first slide rail group.

3. The grinding mechanism of a disc grinder according to claim 1, characterized in that: The three-disc grinding structure includes a second base plate, a grinding motor, a driving wheel, a first transmission belt, a second transmission belt, a third transmission belt, a first disc grinding assembly, a first driven wheel, a second driven wheel, a second disc grinding assembly, a third driven wheel, a fourth driven wheel, a third disc grinding assembly and a fifth driven wheel. The grinding motor and the second base plate are both fixedly mounted on the connecting plate, and the first disc grinding assembly, the second disc grinding assembly and the third disc grinding assembly are fixedly mounted on the second base plate from right to left in sequence. The driving wheel is sleeved on the output end of the grinding motor and connected to the output end of the grinding motor. The first driven wheel and the second driven wheel are both sleeved on the first disc grinding assembly and connected to the first disc grinding assembly. The first driven wheel is located on the outside of the second driven wheel, and the first transmission belt is tensionedly sleeved on the driving wheel and the first driven wheel.

4. The grinding mechanism of a disc grinder according to claim 3, characterized in that: The third driven wheel and the fourth driven wheel are arranged on the second disc-type grinding assembly and connected to the second disc-type grinding assembly, the third driven wheel and the second driven wheel are located on the same straight line, the second transmission belt tensioning sleeve is arranged on the second driven wheel and the third driven wheel, the fifth driven wheel is arranged on the third disc-type grinding assembly and connected to the third disc-type grinding assembly, the fifth driven wheel and the fourth driven wheel are located on the same straight line, and the third transmission belt tensioning sleeve is arranged on the fourth driven wheel and the fifth driven wheel.

5. The grinding mechanism of a disc grinder according to claim 3, characterized in that: The first disc-type grinding assembly includes a transmission shaft, a sleeve and a disc. The sleeve is fixedly mounted on the second base plate. The transmission shaft passes through the sleeve, one end of which is connected to the first driven wheel and the second driven wheel, and the other end is connected to the disc. Sandpaper is installed on the disc.

6. The grinding mechanism of a disc grinder according to claim 5, characterized in that: The structures of the second disc-type grinding assembly and the third disc-type grinding assembly are the same as that of the first disc-type grinding assembly. One end of the transmission shaft of the second disc-type grinding assembly is connected to the third driven wheel and the fourth driven wheel in sequence, and one end of the transmission shaft of the third disc-type grinding assembly is connected to the fifth driven wheel. The disc of the second disc-type grinding assembly is located behind the disc of the first disc-type grinding assembly, and the disc of the third disc-type grinding assembly is located behind the disc of the second disc-type grinding assembly.

7. The grinding mechanism of a disc grinder according to claim 3, characterized in that: The three-disc grinding structure also includes a first pressure roller assembly and a second pressure roller assembly, the first pressure roller assembly is located between the first disc grinding assembly and the second disc grinding assembly, and is fixedly mounted on the second base plate, the second pressure roller assembly is located between the second disc grinding assembly and the third disc grinding assembly, and is fixedly mounted on the connecting plate, the first pressure roller assembly includes a support rod, a pressure roller and a wheel shaft, the support rod is provided with a mounting hole, one end of the wheel shaft is clamped in the mounting hole and is bolted to the support rod, the pressure roller is sleeved on the other end of the wheel shaft and is connected to the wheel shaft, the pressure roller of the first pressure roller assembly is located above the second transmission belt and contacts with the second transmission belt, the structure of the second pressure roller assembly is the same as that of the first pressure roller assembly, and its pressure roller is located above the third transmission belt and contacts with the third transmission belt.

8. The grinding mechanism of a disc grinder according to claim 3, characterized in that: The tool setting assembly also includes a third base plate, a support plate, a second slide rail, a second slider, a third slider, a sliding plate, a spring, a front baffle, a rear baffle and a tool setting device. The third base plate is fixedly mounted on the second base plate and is located on the outside of the third disc grinding assembly. The support plate is vertically mounted on the third base plate. The front baffle and the rear baffle are respectively fixedly mounted on the front and rear ends of the support plate. The second slide rail is fixedly mounted on the support plate and is located between the front baffle and the rear baffle. The second slider and the third slider are both fixedly mounted on the sliding plate and slidably connected to the second slide rail. A spring hole is provided at one end of the sliding plate, and the tool setting device is installed at the other end. One end of the spring is fixedly mounted in the spring hole, and the other end is fixedly connected to the rear baffle.

9. The grinding mechanism of a disc grinder according to claim 8, characterized in that: The tool setting assembly also includes a protective shell, a limit piece and a limit plate. The limit plate is fixedly installed below the sliding plate. The second sliding block is close to the tool setting device and is located above the limit plate. The limit piece is fixedly installed on the support plate, and its top end abuts against the limit plate. The protective shell is sleeved on the outside of the support plate, the sliding plate, the front baffle plate and the rear baffle plate, and the top end of the tool setting device extends out of the protective shell.

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