Engine cylinder head coping tool

Abstract

The utility model relates to the technical field of engine production, in particular to an engine cylinder head coping tool which can firmly fix an engine cylinder head on a workbench, adapt to the complex external shape of the engine cylinder head, prevent the engine cylinder head from shifting in the coping process and improve the coping quality of the engine cylinder head. In addition, waste chips are sucked away in time after grinding is completed, and the waste chips are prevented from affecting follow-up grinding; comprising a workbench; the device further comprises two sets of fixing mechanisms, a driving mechanism, a grinding mechanism, an air exhaust mechanism and a sweeping mechanism, the two sets of fixing mechanisms are installed on the workbench and fix the engine cylinder head, the driving mechanism is installed on the workbench, the grinding mechanism is installed on the driving mechanism, and the driving mechanism and the grinding mechanism are matched to grind and shape the engine cylinder head. The air exhaust mechanism is installed on the grinding mechanism and used for cleaning sweeps generated by grinding of the engine cylinder head, and the sweeping mechanism is installed on the air exhaust mechanism and used for sweeping the sweeps.

Description

Technical Field

[0001] The utility model relates to the technical field of engine production, in particular to a grinding tool for an engine cylinder head. Background Art

[0002] The cylinder head is the cylinder cover, which is located at the top of the engine. Together with the cylinder liner and piston, it forms a closed space. It is an important component that assists fuel combustion in generating power. The cylinder head is installed on the cylinder block, sealing the cylinder from the top to form a combustion chamber. It is often in contact with high-temperature and high-pressure gases and is subject to huge thermal and mechanical loads.

[0003] Existing grinding tools, such as a probe grinding tool disclosed in the utility model patent with application number 201721294637.1, have a main structure including a side slider, a vertical guide rail, a probe box, a probe, a test block, a slider connecting rod, a bottom plate, left and right support plates, a lower guide rail, sandpaper, an upper guide rail, and a horizontal slider, wherein the left and right support plates are respectively fixed on both sides of the bottom plate, the lower guide rail is fixed on the bottom plate and is located between the left and right support plates, the vertical guide rails are respectively fixed to the top of the left and right support plates, the side sliders are respectively installed on the vertical guide rails, the two ends of the two upper guide rails are respectively installed on the side sliders, the slider connecting rod is connected to the upper guide rail through a horizontal slider, the test block is fixed on the lower guide rail, and the sandpaper is fixed on the test block. The top of the probe box is connected to the lower end of the slider connecting rod, the probe is fixed on the probe box, and the side slider and the probe box are adjusted to fit the probe with the sandpaper; when in use, a special test block and sandpaper are installed, and fixed in the center position with a clamp and bolts, the probe is installed into the probe box, and the third bolt and the fourth bolt are tightened to fix the probe, and the positions of the four side sliders and the spring on the probe box in the vertical direction are adjusted to make the surface of the probe fit with the sandpaper on the test block, and the bottom surface of the probe fits with the sandpaper on the test block by moving the slider on the guide rail up and down, and the bottom surface of the probe is attached to the sandpaper for horizontal movement, and the horizontal slider moves horizontally on the guide rail, and the horizontal slider is moved back and forth several times until the curved surface of the bottom surface of the probe meets the requirements.

[0004] However, the engine cylinder head is uneven, and the existing grinding tooling cannot fix it well, and the residue after grinding is very likely to remain in the gap of the cylinder head and is difficult to clean. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an engine cylinder head grinding tool which can not only firmly fix the engine cylinder head on the workbench, adapt to the complex external shape of the engine cylinder head, and prevent the engine cylinder head from shifting during the grinding process, but also promptly absorb the waste chips after the grinding is completed to prevent the waste chips from affecting subsequent grinding.

[0006] The utility model discloses an engine cylinder head grinding tool, comprising a workbench; further comprising two groups of fixing mechanisms, a driving mechanism, a grinding mechanism, an exhaust mechanism and a cleaning mechanism, both of which are mounted on the workbench and fix the engine cylinder head, the driving mechanism is mounted on the workbench, the grinding mechanism is mounted on the driving mechanism, the driving mechanism and the grinding mechanism cooperate to grind and reshape the engine cylinder head, the exhaust mechanism is mounted on the grinding mechanism to clean up the waste chips generated by grinding the engine cylinder head, and the cleaning mechanism is mounted on the exhaust mechanism and cleans up the waste chips; the two groups of fixing mechanisms fix the engine cylinder head, and then the driving mechanism is started, the driving mechanism drives the grinding mechanism to grind the engine cylinder head, and then the driving mechanism starts the exhaust mechanism to suck away the waste chips generated during grinding, and at the same time the cleaning mechanism cleans the engine cylinder head, so that the waste chips are conveniently sucked away by the exhaust mechanism, and since the exhaust mechanism and the cleaning mechanism are both mounted on the grinding mechanism, it is convenient to suck away the waste chips generated by grinding the engine cylinder head in time after the grinding is completed, and it is convenient to cooperate with the complex external shape of the engine cylinder head.

[0007] Preferably, the fixing mechanism comprises a base, two groups of motors, two groups of two-way reciprocating screws, four groups of sliding brackets, four groups of capstans, four groups of rotating shafts and two groups of binding straps, the bottom end of the base is connected to the top end of the workbench, and two groups of sliding grooves are opened on the base, the two groups of motors are installed on the side walls of the base, the two groups of two-way reciprocating screws are rotatably installed in the two groups of sliding grooves of the base, the four groups of sliding brackets are respectively installed on the four sections of threads of the two groups of two-way reciprocating screws, the four groups of capstans are respectively installed on the four groups of sliding brackets, the four groups of rotating shafts are respectively rotatably installed on the four groups of sliding brackets, and the two groups of binding straps are respectively fixedly installed on the two groups of rotating shafts on the same group of two-way reciprocating screws; the engine cylinder head is placed on the base, the two groups of motors are started, the motor drives the two-way reciprocating screw to rotate, the two-way reciprocating screw drives the four groups of sliding brackets to move toward the engine cylinder head, and the capstan is started at the same time, the capstan drives the rotating shaft to rotate, and the rotating shaft drives the binding strap to be tightened and fixed on the engine cylinder head.

[0008] Preferably, the driving mechanism includes a frame, a cross beam, a rib plate, a second motor, a reducer, a transmission shaft 1 and a bevel gear 1. The bottom end of the frame is connected to the top of the workbench, the bottom end of the cross beam is connected to the top of the frame, the rib plate is connected and installed on the frame and the cross beam, the bottom end of the second motor is connected to the top of the cross beam, the bottom end of the reducer is connected to the top of the cross beam, the transmission shaft 1 is rotatably installed at the bottom end of the reducer, and the bevel gear 1 is installed on the transmission shaft 1; by providing the rib plate, the connection effect between the frame and the cross beam is enhanced, and the stability of the overall device is enhanced. When the second motor is started, the second motor drives the transmission shaft 1 to rotate through the reducer, and the transmission shaft 1 drives the bevel gear 1 to rotate.

[0009] Preferably, the grinding mechanism includes a reciprocating screw, a second transmission shaft, a second bevel gear, a slider, a cylinder and a grinder. A movable groove is opened at the bottom end of the cross beam, the reciprocating screw is rotatably installed in the movable groove of the cross beam, the second transmission shaft is installed on the reciprocating screw, the second bevel gear is installed on the second transmission shaft, and the second bevel gear is meshed with the first bevel gear for transmission, the slider is slidably installed on the reciprocating screw, the top of the cylinder is connected to the bottom end of the slider, and the grinder is installed on the cylinder; the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the second transmission shaft and the reciprocating screw to rotate, and the reciprocating screw drives the slider to slide along the movable groove of the cross beam. By setting the cylinder, it is convenient for the grinder to always contact the outer surface of the engine cylinder head, and the grinder grinds the engine cylinder head.

[0010] Preferably, the exhaust mechanism includes a third transmission shaft, an air pump, an exhaust pipe, a connecting plate, a dust box and a drain pipe. The third transmission shaft is rotatably mounted on the reducer, the bottom end of the air pump is connected to the top end of the cross beam and to the third transmission shaft, the exhaust pipe is mounted on the air pump, the connecting plate is mounted on the grinding machine, the top end of the dust box is connected to the bottom end of the connecting plate, a cavity is provided inside the dust box and is connected to the inside of the exhaust pipe, and the drain pipe is mounted on the air pump; the reducer drives the third transmission shaft to rotate, the third transmission shaft starts the air pump, and the air pump draws air through the exhaust pipe and the dust box to suck away the waste chips from grinding, and then discharges the waste chips through the drain pipe.

[0011] Preferably, the cleaning mechanism comprises two sets of rotating shafts 2, multiple sets of cleaning brushes, two sets of connecting rods 1, connecting rod 2, motor 3, transmission shaft 4, turntable and pulling rod. The two sets of rotating shafts 2 are rotatably installed in the cavity of the dust collecting box, and the multiple sets of cleaning brushes are respectively installed on the two sets of rotating shafts 2, the two sets of connecting rods 1 are respectively installed on the two sets of rotating shafts 2 and are located outside the cavity of the dust collecting box, the connecting rod 2 is connected and installed between the two sets of connecting rods 1, the motor 3 is installed on the outer wall of the dust collecting box, the transmission shaft 4 is rotatably installed on the motor 3, the turntable is installed on the transmission shaft 4, and the pulling rod is rotatably installed on the turntable and a set of connecting rods 1 close to the turntable; start the motor 3, the motor 3 drives the transmission shaft 4 to rotate, the transmission shaft 4 drives the turntable to rotate, the turntable rotates and pulls the pulling rod, the pulling rod reciprocates to pull a set of connecting rods 1 close to the turntable, the connecting rod 1 drives the rotating shaft 2 to reciprocate, and the rotating shaft 2 mobilizes the cleaning brush to clean the outer surface of the engine cylinder head to sweep up the waste debris, making it convenient for the exhaust mechanism to suck it away.

[0012] Preferably, the material of the strap is nylon webbing made of synthetic fibers such as polyester, polypropylene and nylon; nylon webbing is a high-strength material with excellent toughness, wear resistance and UV resistance, and is light in weight and has a long service life. It can not only better fit the outer surface of the engine cylinder head, but also enhance the fixing effect on the engine cylinder head.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: two sets of fixing mechanisms fix the engine cylinder head, and then the driving mechanism is started, the driving mechanism drives the grinding mechanism to grind the engine cylinder head, and then the driving mechanism starts the exhaust mechanism to suck away the waste chips generated during the grinding, and at the same time the cleaning mechanism cleans the engine cylinder head, making it convenient for the exhaust mechanism to suck away the waste chips. Since the exhaust mechanism and the cleaning mechanism are both installed on the grinding mechanism, it is convenient to suck away the waste chips generated by the grinding of the engine cylinder head in time after the grinding is completed, and it is also convenient to cooperate with the complex external shape of the engine cylinder head. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the axonometric structure of the utility model;

[0015] Figure 2 It is a partially enlarged axonometric structural diagram of the fixing mechanism of the utility model;

[0016] Figure 3 It is a schematic diagram of the front view and cross-section axonometric structure of the driving mechanism and the grinding mechanism of the utility model;

[0017] Figure 4 It is an axonometric structural diagram of the driving mechanism, grinding mechanism and air extraction mechanism of the utility model;

[0018] Figure 5 It is a partially enlarged axonometric structural schematic diagram of the cleaning mechanism of the utility model.

[0019] Markings in the attached drawings: 01, workbench; 02, fixing mechanism; 21, base; 22, motor 1; 23, two-way reciprocating screw; 24, sliding bracket; 25, capstan; 26, rotating shaft 1; 27, binding belt; 03, driving mechanism; 31, frame; 32, beam; 33, rib plate; 34, motor 2; 35, reducer; 36, transmission shaft 1; 37, bevel gear 1; 04, grinding mechanism; 41, reciprocating screw; 42, Transmission shaft two; 43, bevel gear two; 44, slider; 45, cylinder; 46, grinding machine; 05, exhaust mechanism; 51, transmission shaft three; 52, air pump; 53, exhaust pipe; 54, connecting plate; 55, dust box; 56, sewage pipe; 06, cleaning mechanism; 61, rotating shaft two; 62, cleaning brush; 63, connecting rod one; 64, connecting rod two; 65, motor three; 66, transmission shaft four; 67, turntable; 68, pulling rod. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0021] The utility model is an engine cylinder head grinding tool, comprising a workbench 01; and also comprising two sets of fixing mechanisms 02, a driving mechanism 03, a grinding mechanism 04, an exhaust mechanism 05 and a cleaning mechanism 06, both of which are mounted on the workbench 01 and fix the engine cylinder head, the driving mechanism 03 is mounted on the workbench 01, the grinding mechanism 04 is mounted on the driving mechanism 03, the driving mechanism 03 and the grinding mechanism 04 cooperate to grind and reshape the engine cylinder head, the exhaust mechanism 05 is mounted on the grinding mechanism 04 to clean up the waste chips from grinding the engine cylinder head, and the cleaning mechanism 06 is mounted on the exhaust mechanism 05 and cleans up the waste chips. The fixing mechanism 02 includes a base 21, two groups of motors 22, two groups of bidirectional reciprocating screws 23, four groups of sliding brackets 24, four groups of capstans 25, four groups of rotating shafts 26 and two groups of straps 27. The bottom end of the base 21 is connected to the top of the workbench 01. Two groups of sliding grooves are opened on the base 21. The two groups of motors 22 are installed on the side walls of the base 21. The two groups of bidirectional reciprocating screws 23 are rotatably installed in the two groups of sliding grooves of the base 21. The four groups of sliding brackets 24 are respectively installed on the four sections of threads of the two groups of bidirectional reciprocating screws 23. The four groups of capstans 25 are respectively installed on the four groups of sliding brackets 24. The four groups of rotating shafts 26 are respectively rotatably installed. On the four sets of sliding brackets 24, two sets of binding belts 27 are respectively fixedly mounted on two sets of rotating shafts 26 on the same set of bidirectional reciprocating screws 23; the driving mechanism 03 includes a frame 31, a crossbeam 32, a rib plate 33, a motor 234, a reducer 35, a transmission shaft 36 and a bevel gear 37. The bottom end of the frame 31 is connected to the top of the workbench 01, the bottom end of the crossbeam 32 is connected to the top of the frame 31, the rib plate 33 is connected and mounted on the frame 31 and the crossbeam 32, the bottom end of the motor 234 is connected to the top of the crossbeam 32, the bottom end of the reducer 35 is connected to the top of the crossbeam 32, and the transmission shaft 36 is rotatably mounted on the reducer 3 5, bevel gear 1 37 is installed on transmission shaft 1 36; grinding mechanism 04 includes reciprocating screw 41, transmission shaft 2 42, bevel gear 2 43, slider 44, cylinder 45 and grinding machine 46, the bottom end of cross beam 32 is provided with a moving groove, reciprocating screw 41 is rotatably installed in the moving groove of cross beam 32, transmission shaft 2 42 is installed on reciprocating screw 41, bevel gear 2 43 is installed on transmission shaft 2 42, and bevel gear 2 43 is meshed with bevel gear 1 37 for transmission, slider 44 is slidably installed on reciprocating screw 41, the top end of cylinder 45 is connected with the bottom end of slider 44, and grinding machine 46 is installed on cylinder 45;The air extraction mechanism 05 includes a transmission shaft 3 51, an air pump 52, an air extraction pipe 53, a connecting plate 54, a dust box 55 and a sewage pipe 56. The transmission shaft 3 51 is rotatably mounted on the reducer 35. The bottom end of the air pump 52 is connected to the top end of the cross beam 32 and to the transmission shaft 3 51. The air extraction pipe 53 is mounted on the air pump 52. The connecting plate 54 is mounted on the grinding machine 46. The top end of the dust box 55 is connected to the bottom end of the connecting plate 54. The dust box 55 is provided with a cavity inside and is connected to the inside of the air extraction pipe 53. The sewage pipe 56 is mounted on the air pump 52. The cleaning mechanism 06 includes two sets of rotating shafts 2 61, multiple sets of cleaning brushes 62, two sets of connecting rods 1 63, connecting rods 2 64, motors 3 65, transmission shafts 4 66, The turntable 67 and the pull rod 68, the two sets of rotating shafts 61 are respectively rotatably mounted in the cavity of the dust box 55, the multiple sets of cleaning brushes 62 are respectively mounted on the two sets of rotating shafts 61, the two sets of connecting rods 63 are respectively mounted on the two sets of rotating shafts 61 and are located outside the cavity of the dust box 55, the connecting rod 2 64 is connected and mounted between the two sets of connecting rods 1 63, the motor 3 65 is mounted on the outer wall of the dust box 55, the transmission shaft 4 66 is rotatably mounted on the motor 3 65, the turntable 67 is mounted on the transmission shaft 4 66, and the pull rod 68 is rotatably mounted on the turntable 67 and a set of connecting rods 1 63 near the turntable 67; the material of the strap 27 is nylon webbing made of synthetic fibers such as polyester, polypropylene and nylon. ;

[0022] like Figures 1 to 5As shown, the utility model is an engine cylinder head grinding tool. When it is working, first, the engine cylinder head is placed on the base 21, and two groups of motors 1 22 are started. The motor 1 22 drives the two-way reciprocating screw 23 to rotate, and the two-way reciprocating screw 23 drives four groups of sliding brackets 24 to move toward the engine cylinder head. At the same time, the capstan 25 is started, and the capstan 25 drives the rotating shaft 1 26 to rotate. The rotating shaft 1 26 drives the binding belt 27 to be tightened and fixed on the engine cylinder head. The motor 2 34 is started, and the motor 2 34 drives the transmission shaft 1 36 to rotate through the reducer 35. The transmission shaft 1 36 drives the bevel gear 1 37 to rotate, and the bevel gear 1 37 drives the bevel gear 2 43 to rotate, and the bevel gear 2 43 drives the transmission shaft 2 42 and the reciprocating screw 41 to rotate, and the reciprocating screw 41 drives the slider 44 along the crossbeam The movable groove 32 slides, and the cylinder 45 is set to facilitate the grinder 46 to always contact the outer surface of the engine cylinder head. The grinder 46 grinds the engine cylinder head and starts the motor 3 65 at the same time. The motor 3 65 drives the transmission shaft 4 66 to rotate, and the transmission shaft 4 66 drives the turntable 67 to rotate. The turntable 67 rotates to pull the pulling rod 68, and the pulling rod 68 reciprocates a group of connecting rods 1 63 near the turntable 67. The connecting rod 1 63 drives the rotating shaft 2 61 to reciprocate, and the rotating shaft 2 61 mobilizes the cleaning brush 62 to clean the outer surface of the engine cylinder head to sweep up the waste chips. The reducer 35 drives the transmission shaft 3 51 to rotate, and the transmission shaft 3 51 starts the air pump 52. The air pump 52 draws air through the exhaust pipe 53 and the dust box 55 to suck away the waste chips under grinding, and then discharges the waste chips through the sewage pipe 56.

[0023] The motor 1 22, winch 25, motor 2 34, reducer 35, cylinder 45 and motor 3 65 of the utility model are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative work by technicians in this field.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An engine cylinder head grinding tool, comprising a workbench (01); characterized in that: The invention also comprises two sets of fixing mechanisms (02), a driving mechanism (03), a grinding mechanism (04), an exhaust mechanism (05) and a cleaning mechanism (06), both of which are installed on a workbench (01) and fix the engine cylinder head. The driving mechanism (03) is installed on the workbench (01), the grinding mechanism (04) is installed on the driving mechanism (03), the driving mechanism (03) and the grinding mechanism (04) cooperate to grind and reshape the engine cylinder head, the exhaust mechanism (05) is installed on the grinding mechanism (04) to clean up the waste chips generated by grinding the engine cylinder head, and the cleaning mechanism (06) is installed on the exhaust mechanism (05) and cleans up the waste chips.

2. The engine cylinder head grinding tool as claimed in claim 1, characterized in that: The fixing mechanism (02) comprises a base (21), two groups of motors (22), two groups of bidirectional reciprocating screws (23), four groups of sliding brackets (24), four groups of capstans (25), four groups of rotating shafts (26) and two groups of binding belts (27). The bottom end of the base (21) is connected to the top end of the workbench (01). Two groups of sliding grooves are opened on the base (21). The two groups of motors (22) are mounted on the side walls of the base (21). The two groups of bidirectional reciprocating screws (23) are rotatably mounted in the two groups of sliding grooves of the base (21). The four groups of sliding brackets (24) are respectively mounted on four sections of threads of the two groups of bidirectional reciprocating screws (23). The four groups of capstans (25) are respectively mounted on the four groups of sliding brackets (24). The four groups of rotating shafts (26) are respectively rotatably mounted on the four groups of sliding brackets (24). The two groups of binding belts (27) are respectively fixedly mounted on the two groups of rotating shafts (26) on the same group of bidirectional reciprocating screws (23).

3. The engine cylinder head grinding tool as claimed in claim 1, characterized in that: The driving mechanism (03) comprises a frame (31), a cross beam (32), a rib plate (33), a second motor (34), a speed reducer (35), a transmission shaft (36) and a first bevel gear (37). The bottom end of the frame (31) is connected to the top end of the workbench (01), the bottom end of the cross beam (32) is connected to the top end of the frame (31), the rib plate (33) is connected and installed on the frame (31) and the cross beam (32), the bottom end of the second motor (34) is connected to the top end of the cross beam (32), the bottom end of the speed reducer (35) is connected to the top end of the cross beam (32), the transmission shaft (36) is rotatably installed on the bottom end of the speed reducer (35), and the first bevel gear (37) is installed on the transmission shaft (36).

4. The engine cylinder head grinding tool as claimed in claim 3, characterized in that: The grinding mechanism (04) comprises a reciprocating screw (41), a transmission shaft (42), a bevel gear (43), a slider (44), a cylinder (45) and a grinding machine (46). A movable groove is provided at the bottom end of the cross beam (32). The reciprocating screw (41) is rotatably mounted in the movable groove of the cross beam (32). The transmission shaft (42) is mounted on the reciprocating screw (41). The bevel gear (43) is mounted on the transmission shaft (42). The bevel gear (43) is meshed with the bevel gear (37) for transmission. The slider (44) is slidably mounted on the reciprocating screw (41). The top end of the cylinder (45) is connected to the bottom end of the slider (44). The grinding machine (46) is mounted on the cylinder (45).

5. The engine cylinder head grinding tool as claimed in claim 3, characterized in that: The air extraction mechanism (05) comprises a transmission shaft (51), an air pump (52), an air extraction pipe (53), a connecting plate (54), a dust collecting box (55) and a sewage discharge pipe (56). The transmission shaft (51) is rotatably mounted on the reducer (35). The bottom end of the air pump (52) is connected to the top end of the cross beam (32) and to the transmission shaft (51). The air extraction pipe (53) is mounted on the air pump (52). The connecting plate (54) is mounted on the grinding machine (46). The top end of the dust collecting box (55) is connected to the bottom end of the connecting plate (54). A cavity is arranged inside the dust collecting box (55) and is communicated with the inside of the air extraction pipe (53). The sewage discharge pipe (56) is mounted on the air pump (52).

6. The engine cylinder head grinding tool as claimed in claim 5, characterized in that: The cleaning mechanism (06) comprises two sets of rotating shafts (61), multiple sets of cleaning brushes (62), two sets of connecting rods (63), connecting rods (64), motors (65), transmission shafts (66), turntables (67) and pulling rods (68). The two sets of rotating shafts (61) are respectively rotatably mounted in the cavities of the dust collecting box (55), the multiple sets of cleaning brushes (62) are respectively mounted on the two sets of rotating shafts (61), and the two sets of connecting rods (63) are respectively mounted on the two sets of rotating shafts (61). The second shaft (61) is located outside the cavity of the dust collecting box (55), the second connecting rod (64) is connected and installed between the two groups of connecting rods (63), the third motor (65) is installed on the outer wall of the dust collecting box (55), the fourth transmission shaft (66) is rotatably installed on the third motor (65), the turntable (67) is installed on the fourth transmission shaft (66), and the pulling rod (68) is rotatably installed on the turntable (67) and a group of connecting rods (63) close to the turntable (67).

Images