Deburring device for tea bar rocker arm production and processing

Abstract

The invention relates to the technical field of deburring, in particular to a deburring device for tea bar rocker arm production and processing, comprising: a frame, on which a platform is arranged; the first deburring mechanism comprises a base arranged on the platform, the base is provided with a placing seat for one end of the rocker arm to be inserted in, and the two sides of the placing seat are provided with hollowed-out grooves facilitating observation of the insertion condition of the rocker arm; a first motor is arranged below the base, wherein the output end of the first motor stretches into the containing base, and the first motor conducts deburring treatment on a hole in one end of the rocker arm. According to the deburring device for tea bar rocker arm production and processing, deburring treatment can be conducted on holes in the two ends of a rocker arm at the same time, and on one hand, the work efficiency can be greatly improved through simultaneous deburring treatment; and on the other hand, workers do not need to continuously switch the position of the rocker arm and replace burr tools in the deburring process, tedious operation is reduced, and efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of deburring, in particular to a deburring device for producing and processing a tea bar rocker arm. Background Art

[0002] With the development of social culture, people pay more and more attention to the health of drinking water. Tea bar machines, as a kind of water dispenser with special functions, are getting more and more attention. At the same time, tea bar machines are generally equipped with rocker arms to facilitate users to collect water.

[0003] At present, in the production process of the rocker arms on the tea bar machines, since most of the rocker arms on the tea bar machines are in the shape of a "7", and holes need to be opened at both ends for convenient installation of related components and water inlet and outlet, the holes on both ends of the rocker arms need to be deburred during the production process of the rocker arms. However, the holes on both ends of the rocker arms are not on the same horizontal plane and are of different sizes. When deburring, the staff needs to constantly switch the position of the rocker arm and replace the deburring tools, which is cumbersome and inefficient. Summary of the invention

[0004] The purpose of the present invention is to provide a deburring device for the production and processing of tea bar rocker arms, which can deburr the holes at both ends of the rocker arm at the same time. On the one hand, the simultaneous deburring can greatly improve work efficiency. On the other hand, there is no need for workers to constantly switch the position of the rocker arm and replace the deburring tools during the deburring process, thereby reducing cumbersome operations and improving efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a deburring device for the production and processing of tea bar rocker arms, comprising: a frame, a platform is provided on the frame; a first deburring mechanism, the first deburring mechanism comprises a base arranged on the platform, the base is provided with a placement seat for inserting one end of the rocker arm, both sides of the placement seat are provided with hollow grooves for conveniently observing the insertion status of the rocker arm, and a first grinding head is provided below the base, the output end of which extends into the placement seat and deburrs the hole at one end of the rocker arm; a second deburring mechanism, the second deburring mechanism comprises a hydraulic rod fixed to the frame, the output end of the hydraulic rod is fixed with a horizontally arranged cross bar, the cross bar is slid with a vertical rod, and the bottom end of the vertical rod is provided with a grinding head for deburring the hole at the other end of the rocker arm. A second grinding head; a clamping mechanism, which includes a transition cylinder fixed on the base, the upper and lower parts of the transition cylinder are connected to a piston cylinder a and a connecting pipe respectively, a piston rod a which moves following the vertical rod is arranged inside the piston cylinder a, and the piston rod a slides on the vertical rod, one side of the connecting pipe is connected to a piston cylinder b which forms a U-shaped structure therewith, and a clamping block which is located on one side of the hollow groove on the placement seat slides inside the piston cylinder b; while the vertical rod moves, the piston rod a is driven to move inside the piston cylinder a, so that the gas inside the piston cylinder a is compressed and enters the transition cylinder, and then the clamping block is pressed to gradually approach the hollow groove on the placement seat through the connecting pipe and the piston cylinder b which are connected to the transition cylinder, until the clamping block passes through the hollow groove and squeezes one end of the rocker arm to fix it.

[0006] Preferably, it also includes a measuring rod fixed on one side of the vertical rod. When the vertical rod moves along the horizontal rod, the measuring rod moves synchronously with the vertical rod and uses the scale a on the surface to observe whether the size and horizontal position of the other end of the rocker arm are qualified. If qualified, the hydraulic rod is used to adjust the position of the second grinding head to perform deburring.

[0007] Preferably, a stretching rod connected to the vertical rod is fixed at one end of the piston rod a, and the end of the stretching rod slides on the vertical rod, and the stretching rod is located below the measuring rod.

[0008] Preferably, a first motor is fixedly mounted on the frame, the first grinding head is detachably mounted on an output end of the first motor, and a deburring end of the first grinding head extends into the interior of the placement seat.

[0009] Preferably, the hollow grooves on both sides of the placement seat are provided with scales b for conveniently observing the insertion status of the rocker arm.

[0010] Preferably, an extension frame for mounting a hydraulic rod is fixed to the upper portion of the frame, and the extension frame is located above the base.

[0011] Preferably, the cross bar is fixedly arranged on the output end of the hydraulic rod, and a scale c is arranged on the cross bar, and the vertical rod slides along the cross bar with damping.

[0012] Preferably, a second motor is fixedly provided at the bottom of the vertical rod, and the second grinding head is detachably mounted on the output end of the second motor.

[0013] Preferably, a piston rod b is slidably disposed inside the piston cylinder b, and one side of the clamping block is fixedly mounted on one end of the piston rod b.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. After the size of the rocker arm is qualified, the present invention starts the hydraulic rod, the output end of the hydraulic rod drives the cross bar to move upward, the cross bar drives the vertical bar to move upward, the vertical bar drives the second motor and the second grinding head to move upward until the second grinding head is inserted into the hole at the other end of the rocker arm, and then starts the first motor and the second motor at the same time, thereby the holes at both ends of the rocker arm can be deburred at the same time. On the one hand, the simultaneous deburring can greatly improve the work efficiency. On the other hand, the second grinding head and the first grinding head are used to deburr the holes on both ends of the rocker arm at the same time, and there is no need for the staff to constantly switch the position of the rocker arm and replace the deburring tools during the deburring process, thereby reducing cumbersome operations and improving efficiency.

[0016] 2. Before deburring the rocker arm, the present invention selects a first grinding head and a second grinding head of appropriate sizes. Then, when deburring the rocker arm, one end of the rocker arm is inserted into the placement seat, and the first grinding head is inserted into the hole at one end of the rocker arm. At this time, the scale b on the hollow grooves on both sides of the placement seat can be used to facilitate the staff to observe the insertion of the rocker arm. On the one hand, it can be checked whether the depth of the position of one end of the rocker arm inserted into the placement seat meets the expectation. On the other hand, the insertion-type pre-fixing method is directly used to quickly and effectively place the rocker arm, thereby improving work efficiency.

[0017] 3. The present invention utilizes the vertical rod to synchronously drive the measuring rod to move. Since the measuring rod is located on one side of the other end of the rocker arm, when the vertical rod stops moving, the measuring rod also stops moving. At this time, the size of the other end of the rocker arm can be intuitively seen through the scale a on the measuring rod, thereby judging whether the quality of the rocker arm is qualified, thereby further improving the production quality of the rocker arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 The second schematic diagram of the overall structure of the present invention;

[0020] Figure 3This is a partial cross-sectional view of the present invention;

[0021] Figure 4 It is the second partial cross-sectional view of the present invention;

[0022] Figure 5 The third is a partial cross-sectional view of the present invention;

[0023] Figure 6 It is a partial structural schematic diagram of the connection part between the second deburring mechanism and the clamping mechanism of the present invention;

[0024] Figure 7 The second schematic diagram of the partial structure of the connection part between the second deburring mechanism and the clamping mechanism of the present invention;

[0025] Figure 8 It is a partial cross-sectional view of the clamping mechanism of the present invention;

[0026] Fig. 9 The second partial cross-sectional view of the clamping mechanism of the present invention;

[0027] Fig.10 It is a partial structural schematic diagram of the connection part between the first deburring mechanism and the clamping mechanism of the present invention.

[0028] In the figure: 1. frame; 2. first deburring mechanism; 21. base; 22. placement seat; 23. first motor; 24. first grinding head; 3. second deburring mechanism; 31. extension frame; 32. hydraulic rod; 33. cross bar; 34. vertical bar; 35. second motor; 36. second grinding head; 37. measuring rod; 4. clamping mechanism; 41. stretching rod; 42. piston cylinder a; 43. transition cylinder; 44. piston rod a; 45. connecting pipe; 46. piston cylinder b; 47. piston rod b; 48. clamping block. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The present invention provides a deburring device for producing and processing a tea bar rocker arm, comprising: a frame 1, on which a platform is provided; a first deburring mechanism 2, which comprises a base 21 provided on the platform, on which a placement seat 22 for inserting one end of the rocker arm is provided, and on both sides of the placement seat 22 are provided hollow grooves for conveniently observing the insertion of the rocker arm, and below the base 21 is provided a first motor 23, the output end of which extends into the placement seat 22 and deburrs the hole at one end of the rocker arm; the first motor 23 is fixedly provided on the frame 1, and the first motor 23 is located below the base 21, and a detachable first grinding head 24 is provided at the output end of the first grinding head 24, and the deburring end of the first grinding head 24 extends into the placement seat 22, and the hollow grooves on both sides of the placement seat 22 are provided with scales b for conveniently observing the insertion of the rocker arm;

[0031] See also Figures 1 to 5 As shown, before the rocker arm is deburred, a first grinding head 24 and a second grinding head 36 of suitable size are selected. Then, when the rocker arm is deburred, one end of the rocker arm is inserted into the placement seat 22, and the first grinding head 24 is inserted into the hole at one end of the rocker arm. At this time, the scale b on the hollow grooves on both sides of the placement seat 22 can be used to facilitate the staff to observe the insertion of the rocker arm. On the one hand, it can be checked whether the depth of the position where one end of the rocker arm is inserted into the placement seat 22 meets the expectation. On the other hand, the insertion-type pre-fixing method is directly used to quickly and effectively place the rocker arm, thereby improving work efficiency.

[0032] The second deburring mechanism 3 includes a hydraulic rod 32 fixed on the frame 1, a horizontally arranged cross bar 33 is fixed to the output end of the hydraulic rod 32, a vertical rod 34 is slid on the cross bar 33 and is located on one side of the base 21, and a second motor 35 for deburring the hole at the other end of the rocker arm is arranged on the vertical rod 34; it includes a measuring rod 37 fixed on one side of the vertical rod 34, according to the size of the rocker arm, when the vertical rod 34 moves to a suitable position along the cross bar 33, the measuring rod 37 moves synchronously with the vertical rod 34 and uses the scale a on the surface to visually observe whether the size and horizontal position of the other end of the rocker arm are qualified. If qualified, The hydraulic rod 32 is used to adjust the position of the second grinding head 36 for deburring. An extension frame 31 for mounting the hydraulic rod 32 is fixed on the upper part of the frame 1. The extension frame 31 is located above the base 21. The cross bar 33 is fixedly arranged on the output end of the hydraulic rod 32, and a scale c is arranged on the cross bar 33. The vertical rod 34 slides along the cross bar 33 with damping. The second motor 35 is fixedly arranged at the lower part of the vertical rod 34, and the output end of the second motor 35 is detachably provided with a second grinding head 36 for deburring the hole at the other end of the rocker arm. The measuring rod 37 is horizontally fixed on one side of the vertical rod 34, and the measuring rod 37 is located on one side of the placement seat 22.

[0033] See also Figures 3 to 6As shown, after one end of the rocker arm is inserted into the placement seat 22 to a depth that meets the expectation, the vertical rod 34 is then pulled to move the vertical rod 34 on the cross bar 33. The moving position of the vertical rod 34 can be intuitively judged through the scale c on the cross bar 33. During the movement of the vertical rod 34, the vertical rod 34 drives the second motor 35 at the bottom to move, and the output end of the second motor 35 drives the second grinding head 36 to move until it reaches a suitable position; during this process, the vertical rod 34 synchronously drives the measuring rod 37 to move. Since the measuring rod 37 is located on one side of the other end of the rocker arm, when the vertical rod 34 stops moving, the measuring rod 37 also stops moving. At this time, the size of the other end of the rocker arm can be intuitively seen through the scale a on the measuring rod 37, thereby judging whether the quality of the rocker arm is qualified, thereby further improving the production quality of the rocker arm;

[0034] After the rocker arm size is qualified, the hydraulic rod 32 is started, and the output end of the hydraulic rod 32 drives the cross bar 33 to move upward, the cross bar 33 drives the vertical rod 34 to move upward, and the vertical rod 34 drives the second motor 35 and the second grinding head 36 to move upward until the second grinding head 36 is inserted into the hole at the other end of the rocker arm, and then the first motor 23 and the second motor 35 are started at the same time, thereby the holes at both ends of the rocker arm can be deburred at the same time. On the one hand, the simultaneous deburring process can greatly improve the work efficiency. On the other hand, the second grinding head 36 and the first grinding head 24 are used to deburr the holes on both ends of the rocker arm at the same time. There is no need for the staff to constantly switch the position of the rocker arm and replace the burr tools during the deburring process, thereby reducing cumbersome operations and improving efficiency. In addition, the second grinding head 36 and the first grinding head 24 are detachable in design, and the appropriate second grinding head 36, the first grinding head 24 and the placement seat 22 can be selected according to the actual situation of the rocker arm, thereby greatly improving practicality and flexibility.

[0035] In addition, the deburring time of the holes at both ends of the rocker arm can be controlled synchronously. On the one hand, the deburring time of the holes at both ends of the rocker arm can be made consistent to maintain the strictness of production. On the other hand, it can avoid the different deburring time of the holes at both ends of the rocker arm, which affects the overall deburring time and reduces work efficiency.

[0036] The clamping mechanism 4 includes a transition cylinder 43 located on the base 21, and the upper and lower parts of the transition cylinder 43 are respectively connected with a piston cylinder a42 and a connecting pipe 45. The piston cylinder a42 is provided with a piston rod a44 that moves with the vertical rod 34. One side of the connecting pipe 45 is connected with a piston cylinder b46 that forms a U-shaped structure with the piston cylinder b46. A clamping block 48 located on one side of the hollow groove on the placement seat 22 slides inside the piston cylinder b46; while the vertical rod 34 moves, the piston rod a44 is driven to move into the piston cylinder a42, so that the gas inside the piston cylinder a42 is compressed and enters the transition cylinder 43 Then, through the connecting pipe 45 connected with the transition cylinder 43 and the piston cylinder b46, the clamping block 48 is pressed to gradually approach the hollow groove on the placement seat 22, until the clamping block 48 passes through the hollow groove and squeezes one end of the rocker arm to fix it, and one end of the piston rod a44 is fixed with a stretching rod 41 connected with the vertical rod 34, the stretching rod 41 is located below the measuring rod 37, and one end of the stretching rod 41 slides on the vertical rod 34, and the piston cylinder b46 slides with a piston rod b47 inside, and one side of the clamping block 48 is fixedly installed on one end of the piston rod b47; and the piston rod a44 slides on the vertical rod 34;

[0037] See also Figures 4 to 10 As shown, in addition, while the vertical rod 34 moves along the horizontal rod 33, the vertical rod 34 drives the stretching rod 41 to move, and the stretching rod 41 drives the piston rod a44 to move, so that the piston rod a44 moves inside the piston cylinder a42, and the internal gas of the piston cylinder a42 is squeezed into the interior of the transition cylinder 43. Since the transition cylinder 43 is connected to two connecting pipes 45, the internal gas of the transition cylinder 43 is squeezed into the interior of the connecting pipe 45, and then since one side of the connecting pipe 45 is connected to the piston cylinder b46 forming a U-shaped structure therewith, the internal gas of the piston cylinder b46 will squeeze the piston rod b47 to move, and the piston rod b47 drives the clamping block 48 to move toward the hollow groove. Before the vertical rod 34 moves to a suitable position, the clamping block 48 moves to the interior of the hollow groove and is clamped at one end of the rocker arm. Contact extrusion, through the two clamping blocks 48 synchronously passing through the hollow groove and cooperating with the placement seat 22, the rocker arm can be clamped and fixed at multiple angles, so that the vertical rod 34 remains stable before it moves to a suitable position. Since the clamping block 48 is made of rubber material with a certain elasticity and is pushed by air pressure, the clamping block 48 can cooperate with the placement seat 22 to continuously maintain the stability of one end of the rocker arm when the vertical rod 34 continues to move to a suitable position; thereby, the rocker arm can be fixed by the clamping block 48 while the sliding vertical rod 34 is adjusted according to the size of the rocker arm to remove burrs from the hole at the other end of the rocker arm, thereby avoiding the rocker arm from shifting and affecting the position adjustment of the second grinding head 36. On the one hand, the design is ingenious, and on the other hand, it reduces the staff's operation on fixing the rocker arm, thereby improving work efficiency.

[0038] Working principle: before deburring the rocker arm, select a first grinding head 24 and a second grinding head 36 of suitable sizes. Then, when deburring the rocker arm, insert one end of the rocker arm into the placement seat 22, and make the first grinding head 24 extend into the hole at one end of the rocker arm. At this time, the scale b on the hollow grooves opened on both sides of the placement seat 22 can be used to facilitate the staff to observe the insertion of the rocker arm. On the one hand, it can be checked whether the depth of the position where one end of the rocker arm is inserted into the placement seat 22 meets the expectation. On the other hand, the insertion-type pre-fixing method can be directly used to quickly and effectively place the rocker arm, thereby improving work efficiency. After the depth of the position where one end of the rocker arm is inserted into the placement seat 22 meets the expectation, the vertical rod 34 is then pulled to move the vertical rod 34 on the cross bar 33. The position of the vertical rod 34 can be intuitively judged through the scale c on the cross bar 33. During the movement of the vertical rod 34, the vertical rod 34 drives the second motor 35 at the bottom to move, and the output end of the second motor 35 drives the second grinding head 36 to move until it reaches the appropriate position.

[0039] In addition, while the vertical rod 34 moves along the horizontal rod 33, the vertical rod 34 drives the stretching rod 41 to move, and the stretching rod 41 drives the piston rod a44 to move, so that the piston rod a44 moves inside the piston cylinder a42, and the internal gas of the piston cylinder a42 is squeezed into the interior of the transition cylinder 43. Since the transition cylinder 43 is connected to two connecting pipes 45, the internal gas of the transition cylinder 43 is squeezed into the interior of the connecting pipe 45, and then since one side of the connecting pipe 45 is connected to the piston cylinder b46 forming a U-shaped structure therewith, the internal gas of the piston cylinder b46 will squeeze the piston rod b47 to move, and the piston rod b47 drives the clamping block 48 to move toward the hollow groove. Before the vertical rod 34 moves to the appropriate position, the clamping block 48 moves to the interior of the hollow groove and contacts and squeezes one end of the rocker arm. The two clamping blocks 48 synchronously penetrate the hollow groove and cooperate with the placement seat 22 to clamp and fix the rocker arm at multiple angles, so that the vertical rod 34 remains stable before it moves to the appropriate position.

[0040] After the rocker arm size is qualified, start the hydraulic rod 32, the output end of the hydraulic rod 32 drives the cross bar 33 to move upward, the cross bar 33 drives the vertical rod 34 to move upward, the vertical rod 34 drives the second motor 35 and the second grinding head 36 to move upward until the second grinding head 36 is inserted into the hole at the other end of the rocker arm, and then start the first motor 23 and the second motor 35 at the same time, thereby the holes at both ends of the rocker arm can be deburred at the same time. On the one hand, the simultaneous deburring process can greatly improve the work efficiency. On the other hand, the second grinding head 36 and the first grinding head 24 are used to deburr the holes on both ends of the rocker arm at the same time. There is no need for the staff to constantly switch the position of the rocker arm and replace the deburring tools during the deburring process, thereby reducing cumbersome operations and improving efficiency.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Deburring device for the production and processing of tea bar rocker arms, characterized in that: include: A frame (1), wherein a platform is provided on the frame (1); A first deburring mechanism (2), the first deburring mechanism (2) comprising a base (21) arranged on the platform, the base (21) being provided with a placement seat (22) for inserting one end of the rocker arm, both sides of the placement seat (22) being provided with hollow grooves for conveniently observing the insertion status of the rocker arm, and a first grinding head (24) having an output end extending into the placement seat (22) and performing deburring treatment on the hole at one end of the rocker arm being provided below the base (21); A second deburring mechanism (3), the second deburring mechanism (3) comprising a hydraulic rod (32) fixed on the frame (1), a horizontally arranged crossbar (33) being fixed to the output end of the hydraulic rod (32), a vertical rod (34) sliding on the crossbar (33), and a second grinding head (36) for deburring the hole at the other end of the rocker arm being arranged at the bottom end of the vertical rod (34); A clamping mechanism (4), the clamping mechanism (4) comprising a transition cylinder (43) fixed on a base (21), the transition cylinder (43) being connected to a piston cylinder a (42) and a connecting pipe (45) at the top and bottom respectively, the piston cylinder a (42) being provided with a piston rod a (44) moving with the vertical rod (34), and the piston rod a (44) sliding on the vertical rod (34), one side of the connecting pipe (45) being connected to a piston cylinder b (46) forming a U-shaped structure therewith, the piston cylinder b (46) being provided with a clamping block (48) slidingly disposed on one side of a hollow groove on the placement seat (22); When the vertical rod (34) moves, it drives the piston rod a (44) to move into the piston cylinder a (42), thereby compressing the gas inside the piston cylinder a (42) and entering the transition cylinder (43). Then, through the connecting pipe (45) connected to the transition cylinder (43) and the piston cylinder b (46), the clamping block (48) is pressed to gradually approach the hollow groove on the placement seat (22) until the clamping block (48) passes through the hollow groove and squeezes one end of the rocker arm to fix it.

2. The deburring device for producing and processing a tea bar rocker arm according to claim 1 is characterized in that: It also includes a measuring rod (37) fixed on one side of the vertical rod (34). When the vertical rod (34) moves along the horizontal rod (33), the measuring rod (37) moves synchronously with the vertical rod (34) and uses the scale a on the surface to observe whether the size and horizontal position of the other end of the rocker arm are qualified. If qualified, the hydraulic rod (32) is used to adjust the position of the second grinding head (36) to perform deburring processing.

3. The deburring device for producing and processing a tea bar rocker arm according to claim 2 is characterized in that: A stretching rod (41) connected to the vertical rod (34) is fixed to one end of the piston rod a (44), and the end of the stretching rod (41) slides on the vertical rod (34). The stretching rod (41) is located below the measuring rod (37).

4. The deburring device for producing and processing a tea bar rocker arm according to claim 1 is characterized in that: The frame (1) is fixedly provided with a first motor (23); the first grinding head (24) is detachably mounted on the output end of the first motor (23); and a deburring end of the first grinding head (24) extends into the interior of the placement seat (22).

5. The deburring device for producing and processing a tea bar rocker arm according to claim 1 is characterized in that: The hollow grooves on both sides of the placement seat (22) are provided with scales b for conveniently observing the insertion status of the rocker arm.

6. The deburring device for producing and processing a tea bar rocker arm according to claim 1 is characterized in that: An extension frame (31) for mounting a hydraulic rod (32) is fixed on the upper part of the frame (1), and the extension frame (31) is located above the base (21).

7. The deburring device for producing and processing a tea bar rocker arm according to claim 1 is characterized in that: The cross bar (33) is fixedly arranged on the output end of the hydraulic rod (32), and a scale c is arranged on the cross bar (33). The vertical rod (34) slides along the cross bar (33) with damping.

8. The deburring device for producing and processing a tea bar rocker arm according to claim 1 is characterized in that: A second motor (35) is fixedly arranged at the bottom of the vertical rod (34), and the second grinding head (36) is detachably mounted on the output end of the second motor (35).

9. The deburring device for producing and processing a tea bar rocker arm according to claim 1, characterized in that: A piston rod b (47) slides inside the piston cylinder b (46), and one side of the clamping block (48) is fixedly mounted on one end of the piston rod b (47).

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