Cylinder cover clamping tool

Abstract

The utility model belongs to the technical field of cylinder cover machining, and provides a cylinder cover clamping tool which comprises a base assembly, the base assembly comprises a bottom plate, a vertical plate, a top plate and a reinforcing plate, the vertical plate is fixedly connected with the bottom plate through the reinforcing plate, and the top plate is fixedly connected with the vertical plate through the reinforcing plate; a guide rod, a first positioning pin and a first supporting nail are fixedly mounted on the vertical plate, and a hold-down mechanism is further arranged on the vertical plate; a lifting supporting plate driven by a lifting oil cylinder is installed on the top plate in the vertical direction in a sliding mode, a lifting positioning pin and a lifting supporting nail are arranged on the lifting supporting plate, a second positioning pin and a second supporting nail are fixedly installed on the top plate, a plurality of pressing rods driven by hydraulic cylinders are further arranged on the top plate, and locking pieces are detachably installed on the tops of the pressing rods. According to the cylinder cover positioning and clamping device, accurate positioning and clamping of the cylinder cover can be achieved, clamping is firm and reliable, convenience is provided for sequential machining of the bottom face and the peripheral face of the cylinder cover, and therefore the machining efficiency and the machining quality of the cylinder cover are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder head processing, in particular to a clamping fixture for a cylinder head. Background Art

[0002] The cylinder head is a box-shaped part with a complex structure, on which intake and exhaust valve seat holes, valve guide holes, spark plug mounting holes (for gasoline engines) or injector mounting holes, etc. are processed. A water jacket, intake and exhaust passages and a combustion chamber or a part of the combustion chamber are also cast in the cylinder head. The cylinder head is the mounting base of the valve mechanism and also the sealing cover of the cylinder. Its function is to seal the cylinder, jointly form a combustion space with the piston, and bear the action of high-temperature and high-pressure combustion gas. It is a key component with a relatively complex structure, high precision requirements and complex processing technology. Its processing quality directly affects the overall performance of the engine.

[0003] During the production and processing of the cylinder head, after the top surface processing operation is completed, the bottom surface and the surrounding surfaces of the cylinder head are usually processed in sequence by a horizontal machine tool. Before processing the bottom surface and the surrounding surfaces of the cylinder head, the cylinder head needs to be clamped and fixed to different clamping fixtures first to achieve the positioning, installation and fixation of the cylinder head and ensure the effective processing of the cylinder head. At present, after the bottom surface of the cylinder head is processed on one machine tool, the cylinder head needs to be disassembled and transported to the clamping fixture of another machine tool for clamping and fixation to realize the processing of the surrounding surfaces of the cylinder head. Not only is the disassembly, installation and transportation operation cumbersome and inconvenient, time-consuming and laborious, but it is also difficult to achieve the accurate positioning and placement and firm clamping and fixation of the cylinder head, which directly affects the processing efficiency and processing quality of the cylinder head. Summary of the Utility Model

[0004] In order to overcome the defects of the prior art pointed out above, the inventor of the present utility model has conducted in-depth research and completed the present utility model after a large amount of creative labor.

[0005] Specifically, the technical problem to be solved by the present utility model is: to provide a clamping fixture for a cylinder head to solve the technical problem that the current clamping tool for the cylinder head is difficult to achieve the accurate positioning and placement and firm clamping and fixation of the cylinder head, resulting in cumbersome and inconvenient processing operations for the bottom surface and the surrounding surfaces of the cylinder head, time-consuming and laborious, and directly affecting the processing efficiency and processing quality of the cylinder head.

[0006] To solve the above technical problem, the technical solution of the present utility model is:

[0007] A clamping fixture for a cylinder head includes a base assembly for mounting on a machine tool workbench. The base assembly includes a bottom plate, a vertical plate, a top plate and a reinforcing plate. The vertical plate is fixedly connected to the bottom plate through the reinforcing plate, and the top plate is fixedly connected to the vertical plate through the reinforcing plate;

[0008] A guide rod, a first positioning pin, and a first support pin are fixedly installed on the vertical plate, and a pressing mechanism for pressing the cylinder head is further provided on the vertical plate;

[0009] A lifting support plate driven by a lifting oil cylinder is slidably installed on the top plate in the vertical direction. A lifting positioning pin and a lifting support pin are provided on the lifting support plate. A second positioning pin and a second support pin are fixedly installed on the top plate. A plurality of pressing rods driven by hydraulic cylinders are further provided on the top plate, and a locking piece is detachably installed at the top of the pressing rod.

[0010] As an improved technical solution, the pressing mechanism includes a lever oil cylinder fixedly installed on the vertical plate. There are a plurality of the first support pins and the lever oil cylinders, and the lever oil cylinders correspond to the first support pins respectively.

[0011] As an improved technical solution, a linear bearing is fixedly installed on the top plate. Guide shafts corresponding to the linear bearing are fixedly installed at both ends of the lifting support plate. The guide shafts are vertically arranged, and the lifting support plate is slidably installed on the top plate through the linear bearing and the guide shafts;

[0012] The lifting oil cylinder is fixedly installed on the top plate, and the end of the piston shaft of the lifting oil cylinder is connected to the lifting support plate.

[0013] As an improved technical solution, there are a plurality of the lifting support pins, and the lifting positioning pin and the lifting support pins are fixedly installed on the lifting support plate.

[0014] As an improved technical solution, there are a plurality of the second support pins, and the second positioning pin and the second support pins are arranged around the lifting support plate.

[0015] As an improved technical solution, the hydraulic cylinder is fixedly installed on the top plate. The pressing rod is vertically arranged, and the bottom end of the pressing rod is fixedly connected to the end of the piston shaft of the hydraulic cylinder. The top end of the pressing rod has an integrally formed pressing stop.

[0016] As an improved technical solution, the locking piece is provided with a U-shaped card slot, and the locking piece is installed on the top of the pressing rod through the U-shaped card slot. When in the clamping state, the locking piece abuts against the pressing stop.

[0017] As an improved technical solution, a pressure maintaining valve, an accumulator, and a sequence valve are installed on the base assembly.

[0018] After adopting the above technical solutions, the beneficial effects of the present utility model are:

[0019] The cylinder head clamping tool has a simple and compact structure. When positioning and clamping the cylinder head that needs to be processed on the bottom surface, the cylinder head is placed close to the vertical plate along the axial direction of the guide rod, and the guided installation of the cylinder head is achieved through the guide rod. The cylinder head is positioned through the first positioning pin. After the cylinder head abuts against the first supporting nail, the first supporting nail supports the cylinder head. In this way, the cylinder head can be positioned and placed on the first clamping part. Finally, the pressing mechanism works to press and fix the cylinder head, and the bottom surface of the cylinder head can be processed by the horizontal machine tool. After the bottom surface of the cylinder head is processed, the pressing mechanism works to release the pressing state of the cylinder head, and the cylinder head with the processed bottom surface can be removed from the first clamping part.

[0020] When positioning and clamping the cylinder head that needs to be processed on all sides, the lifting support plate is in a raised state, the clamping rod is in a raised state, the bolt holes of the cylinder head are respectively aligned with the clamping rods, and then the cylinder head is placed close to the top plate along the axial direction of the clamping rod, and the cylinder head is positioned by the lifting positioning pins. After the cylinder head abuts against the lifting support nails, the lifting support nails support the cylinder head. After that, the locking plate is installed on the top of the clamping rod to achieve pre-positioning of the cylinder head on the lifting support plate. After that, the lifting cylinder is actuated to drive the lifting support plate and the cylinder head to move downward, and the cylinder head is supported by the second positioning pins. The cylinder head is positioned until it rests against the second supporting nail, and the second supporting nail supports the cylinder head. In this way, the cylinder head can be positioned and placed on the second clamping part. Finally, the hydraulic cylinder works to drive the clamping rod to descend, and the cylinder head can be pressed and fixed by the locking plate. The horizontal machine tool can be used to process the surrounding surfaces of the cylinder head. After the surrounding surfaces of the cylinder head are processed, the hydraulic cylinder works to drive the clamping rod to rise, and the pressing state of the cylinder head is released. Then the lifting cylinder works to drive the lifting plate to lift the cylinder head. After that, the locking plate is removed, and the cylinder head can be removed from the second clamping part.

[0021] By means of the cylinder head clamping tool, after the cylinder head is positioned and clamped on the first clamping part, the bottom surface of the cylinder head can be processed. After the bottom surface of the cylinder head is processed, the cylinder head is removed from the first clamping part, and then the cylinder head is repositioned and clamped on the second clamping part for processing on all surrounding surfaces. This not only enables accurate positioning and clamping of the cylinder head, and the clamping is firm and reliable, but also makes the disassembly and assembly of the cylinder head simple and convenient, providing convenience for the sequential processing of the bottom surface and surrounding surfaces of the cylinder head, thereby greatly improving the processing efficiency and processing quality of the cylinder head. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts do not necessarily draw according to the actual scale.

[0023] Figure 1 It is a schematic structural view of the clamping tooling for the cylinder head of the present invention;

[0024] Figure 2 It is another three-dimensional structural view of the clamping tooling for the cylinder head of the present invention;

[0025] Figure 3 It is yet another three-dimensional structural view of the clamping tooling for the cylinder head of the present invention;

[0026] Figure 4 It is a schematic structural view of the clamping state of the cylinder head of the present invention on the clamping tooling for the cylinder head;

[0027] Figure 5 It is a schematic structural view of the first clamping part of the present invention;

[0028] Figure 6 It is a schematic structural view of the clamping state of the cylinder head of the present invention on the first clamping part;

[0029] Figure 7 It is a schematic structural view of the second clamping part of the present invention;

[0030] Figure 8 It is another three-dimensional structural view of the second clamping part of the present invention;

[0031] Figure 9 It is yet another three-dimensional structural view of the second clamping part of the present invention;

[0032] Figure 10 It is a schematic structural view of the clamping state of the cylinder head of the present invention on the second clamping part;

[0033] Figure 11 It is a schematic structural view of the installation of the lifting support plate of the present invention;

[0034] Figure 12 It is a schematic structural view of the locking piece of the present invention;

[0035] Figure markings: 1-machine tool worktable; 2-bottom plate; 3-vertical plate; 4-top plate; 5-reinforcement plate; 6-guide rod; 7-first positioning pin; 8-first supporting pin; 9-lever cylinder; 10-lifting cylinder; 11-lifting support plate; 12-linear bearing; 13-guide shaft; 14-lifting positioning pin; 15-lifting supporting pin; 16-second positioning pin; 17-second supporting pin; 18-hydraulic cylinder; 19-clamping rod; 1901-clamping stopper; 20-locking plate; 2001-U-shaped slot; 21-pressure maintaining valve; 22-energy accumulator; 23-sequence valve; 24-cylinder head. DETAILED DESCRIPTION

[0036] The utility model is further described below in conjunction with specific embodiments. However, the use and purpose of these exemplary embodiments are only used to illustrate the utility model, and do not constitute any form of limitation on the actual protection scope of the utility model, nor do they limit the protection scope of the utility model to them.

[0037] like Figures 1 to 12 As shown together, the present embodiment provides a cylinder head clamping tool, including a base assembly for being installed on a machine tool workbench 1, the base assembly including a bottom plate 2, a vertical plate 3, a top plate 4 and a reinforcing plate 5, the vertical plate 3 being fixedly connected to the bottom plate 2 via the reinforcing plate 5, and the top plate 4 being fixedly connected to the vertical plate 3 via the reinforcing plate 5; a guide rod 6, a first positioning pin 7 and a first supporting pin 8 are fixedly installed on the vertical plate 3, and a holding mechanism for holding the cylinder head 24 is also provided on the vertical plate 3; a lifting support plate 11 driven by a lifting cylinder 10 is slidably installed on the top plate 4 in a vertical direction, a lifting positioning pin 14 and a lifting supporting pin 15 are provided on the lifting support plate 11, a second positioning pin 16 and a second supporting pin 17 are fixedly installed on the top plate 4, and a clamping rod 19 driven by a plurality of hydraulic cylinders 18 is also provided on the top plate 4, and a locking plate 20 is detachably installed on the top of the clamping rod 19.

[0038] like Figures 1 to 4 As shown together, in this embodiment, the base plate 2 is used to achieve a fixed connection with the machine tool worktable 1, so as to achieve fixed installation of the base assembly on the machine tool worktable 1; the vertical plate 3 is vertically arranged with the base plate 2, and the top plate 4 is vertically arranged with the vertical plate 3; the guide rod 6, the first positioning pin 7, the first support nail 8 and the holding mechanism are all located on the side of the vertical plate 3 away from the reinforcing plate 5, and the lifting plate 11, the second positioning pin 16, the second support nail 17 and the clamping rod 19 are all located on the side of the top plate 4 away from the vertical plate 3.

[0039] like Figures 1 to 6As shown together, the pressing mechanism includes a lever oil cylinder 9 fixedly installed on the vertical plate 3. There are several first support pins 8 and lever oil cylinders 9, and the lever oil cylinders 9 correspond to the first support pins 8 respectively. The lever oil cylinder 9 is selected for the pressing mechanism, which has a simple structure and can realize the automatic pressing of the cylinder head 24, making the clamping operation of the cylinder head 24 simple and convenient, and the clamping firm and reliable.

[0040] When positioning and clamping the cylinder head 24 whose bottom surface needs to be machined, place the cylinder head 24 along the axial direction of the guide rod 6 close to the vertical plate 3. The guiding installation of the cylinder head 24 is realized through the guide rod 6, and the positioning of the cylinder head 24 is realized through the first positioning pin 7. After the cylinder head 24 abuts against the first support pin 8, the first support pin 8 supports the cylinder head 24. In this way, the positioning placement of the cylinder head 24 in the first clamping part can be realized. Finally, the pressing mechanism works to realize the pressing and fixing of the cylinder head 24, and then the bottom surface of the cylinder head 24 can be machined by a horizontal machine tool; after the bottom surface machining of the cylinder head 24 is completed, the pressing mechanism works to release the pressing state of the cylinder head 24, and then the cylinder head 24 with the bottom surface machined can be removed from the first clamping part.

[0041] As Figures 1 to 4 、 Figures 7 to 11 As shown together, to realize the sliding installation of the lifting support plate 11 on the top plate 4, a linear bearing 12 is fixedly installed on the top plate 4. Guide shafts 13 corresponding to the linear bearing 12 are fixedly installed at both ends of the lifting support plate 11. The guide shafts 13 are arranged vertically, and the lifting support plate 11 is slidably installed on the top plate 4 through the linear bearing 12 and the guide shafts 13. The lifting oil cylinder 10 is fixedly installed on the top plate 4, and the end of the piston shaft of the lifting oil cylinder 10 is connected to the lifting support plate 11. The lifting support plate 11 is slidably installed on the top plate 4 through the linear bearing 12 and the guide shafts 13. In this way, the stable lifting and lowering of the lifting support plate 11 on the top plate 4 can be realized, ensuring the stable lifting and lowering of the cylinder head 24 under the drive of the lifting oil cylinder 10.

[0042] As Figures 1 to 4 、 Figures 7 to 11 As shown together, there are several lifting support pins 15. The lifting positioning pins 14 and the lifting support pins 15 are both fixedly installed on the lifting support plate 11. When the cylinder head 24 is placed on the lifting support plate 11, the seat ring holes of the cylinder head 24 correspond to the lifting positioning pins 14. The positioning placement of the cylinder head 24 is realized through the lifting positioning pins 14, and the support of the cylinder head 24 is realized through the lifting support pins 15.

[0043] As Figures 1 to 4 、 Figures 7 to 11As shown together, a plurality of second support pins 17 are provided. The second positioning pins 16 and the second support pins 17 are arranged around the lifting support plate 11. The second positioning pins 16 position and place the cylinder head 24 on the top plate 4, and the second support pins 17 support the cylinder head 24 during clamping.

[0044] As Figures 1 to 4 , Figures 7 to 11 As shown together, the hydraulic cylinder 18 is fixedly installed on the top plate 4. The pressing rod 19 is arranged vertically, and the bottom end of the pressing rod 19 is fixedly connected to the end of the piston shaft of the hydraulic cylinder 18. The top end of the pressing rod 19 has an integrally formed pressing stop 1901. In this embodiment, four pressing rods 19 are arranged vertically and are respectively driven by the hydraulic cylinder 18. When the hydraulic cylinder 18 works, it drives the pressing rod 19 to lift and lower, and the locking piece 20 is used to press and release the cylinder head 24.

[0045] As Figures 7 to 12 As shown together, for the convenience of installing and removing the locking piece 20 on the top of the pressing rod 19, the locking piece 20 is provided with a U-shaped card slot 2001. The locking piece 20 is installed on the top of the pressing rod 19 through the U-shaped card slot 2001. When in the clamping state, the locking piece 20 abuts against the pressing stop 1901.

[0046] When positioning and clamping the cylinder head 24 that needs to be machined on its four sides, the lifting support plate 11 is in the lifted state, and the pressing rod 19 is in the raised state. Align the bolt holes of the cylinder head 24 with the pressing rods 19 respectively, and then place the cylinder head 24 close to the top plate 4 along the axial direction of the pressing rod 19. The cylinder head 24 is positioned by the lifting positioning pin 14. After the cylinder head 24 abuts against the lifting support pin 15, the lifting support pin 15 supports the cylinder head 24. Then, the locking piece 20 is installed on the top of the pressing rod 19, and the pre-positioning placement of the cylinder head 24 on the lifting support plate 11 can be realized. After that, the lifting oil cylinder 10 acts to drive the lifting support plate 11 and the cylinder head 24 to move downward, and the cylinder head 24 is positioned by the second positioning pin 16 until the cylinder head 24 abuts against the second support pin 17, and the second support pin 17 supports the cylinder head 24. In this way, the positioning placement of the cylinder head 24 in the second clamping part can be realized. Finally, the hydraulic cylinder 18 works to drive the pressing rod 19 to descend, and the cylinder head 24 is pressed and fixed by the locking piece 20, and the four sides of the cylinder head 24 can be machined by the horizontal machine tool; after the machining of the four sides of the cylinder head 24 is completed, the hydraulic cylinder 18 works to drive the pressing rod 19 to rise, releasing the pressing state of the cylinder head 24. Then the lifting oil cylinder 10 works to drive the lifting support plate 11 to lift and hold up the cylinder head 24. After that, the locking piece 20 is removed, and the cylinder head 24 can be removed from the second clamping part.

[0047] As Figures 1 to 10As shown together, in this embodiment, a pressure maintaining valve 21, an accumulator 22 and a sequence valve 23 are installed on the base assembly. The pressure maintaining valve 21 is mainly used to maintain a constant pressure in the hydraulic system, ensuring that the system pressure will not drop due to leakage when the actuating element does not operate for a long time, so that the lever cylinder 9, the hydraulic cylinder 18, etc. can maintain a stable working state. The accumulator 22 can supplement this leakage, thus maintaining a constant pressure. In addition, the pressure maintaining valve 21 can also serve as an emergency power source in case of emergencies such as pump failures or power outages, ensuring that the actuating element can continue to complete necessary actions. The accumulator 22, also known as an energy storage device, its main functions include serving as an auxiliary power source, maintaining system pressure or serving as an emergency power source, absorbing system pulsations, and alleviating hydraulic shocks, etc. In a hydraulic system with intermittent operation or a periodic action cycle, the accumulator 22 can store the excess pressure oil output by the hydraulic pump and release it when the system needs it, reducing the rated flow rate of the hydraulic pump, lowering the motor power consumption and the temperature rise of the hydraulic system. In addition, the accumulator 22 can also absorb the shock caused by sudden changes in system pressure, such as the hydraulic shock caused by the sudden start or stop of the hydraulic pump, as well as absorb the pressure pulsations caused by the flow rate pulsations during the operation of the hydraulic pump, reducing noise. Thus, through the joint cooperation of the pressure maintaining valve 21 and the accumulator 22 in the hydraulic system, the stable operation and safety of the system are ensured. The pressure maintaining valve 21 is mainly responsible for maintaining system pressure and providing power in case of emergencies, while the accumulator 22 assists the system operation by storing and releasing energy, absorbing shocks and pulsations, reducing noise, etc. The two complement each other in the hydraulic system to jointly ensure the normal operation of the system. The sequence valve 23 is a valve that controls the action sequence of the actuating element according to the pressure of the circuit, etc., enabling the lifting cylinder 10 and the hydraulic cylinder 18 to accurately achieve sequential actions.

[0048] Based on the above-structured clamping tool for the cylinder head, the structure is simple and compact, and it can realize the positioning and clamping of the cylinder head 24. Through this clamping tool for the cylinder head 24, after the cylinder head 24 is positioned and clamped on the first clamping part, the bottom surface of the cylinder head 24 can be machined. After the machining of the bottom surface of the cylinder head 24 is completed, the cylinder head 24 is removed from the first clamping part, and then the cylinder head 24 is re-positioned and clamped on the second clamping part for machining of the surrounding surfaces. It can not only realize the precise positioning and clamping of the cylinder head 24, with firm and reliable clamping, but also make the disassembly and assembly operation of the cylinder head 24 simple and convenient, providing convenience for the sequential machining of the bottom surface and the surrounding surfaces of the cylinder head 24, thus greatly improving the machining efficiency and machining quality of the cylinder head 24.

[0049] It should be understood that the use of these embodiments is only for illustrating the present utility model rather than intending to limit the protection scope of the present utility model. In addition, it should also be understood that after reading the technical content of the present utility model, those skilled in the art can make various changes, modifications and / or variations to the present utility model, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A cylinder head clamping tool, characterized in that: The base assembly comprises a base assembly for installation on a machine tool workbench, wherein the base assembly comprises a bottom plate, a vertical plate, a top plate and a reinforcing plate, wherein the vertical plate is fixedly connected to the bottom plate through the reinforcing plate, and the top plate is fixedly connected to the vertical plate through the reinforcing plate; The vertical plate is fixedly mounted with a guide rod, a first positioning pin and a first supporting nail, and the vertical plate is also provided with a holding mechanism for holding the cylinder head; A lifting support plate driven by a lifting cylinder is slidably installed on the top plate in the vertical direction, and a lifting positioning pin and a lifting support nail are provided on the lifting support plate. A second positioning pin and a second support nail are fixedly installed on the top plate. A plurality of clamping rods driven by a hydraulic cylinder are also provided on the top plate, and a locking plate is detachably installed on the top of the clamping rod.

2. The cylinder head clamping tool according to claim 1, characterized in that: The pressing mechanism includes a lever cylinder fixedly mounted on the vertical plate, and the first supporting nails and the lever cylinder are both provided with a plurality of lever cylinders, and the lever cylinders correspond to the first supporting nails respectively.

3. The cylinder head clamping tool according to claim 1, characterized in that: A linear bearing is fixedly mounted on the top plate, and guide shafts corresponding to the linear bearings are fixedly mounted on both ends of the lifting support plate, the guide shafts are vertically arranged, and the lifting support plate is slidably mounted on the top plate through the linear bearings and the guide shafts; The lifting cylinder is fixedly mounted on the top plate, and the piston shaft end of the lifting cylinder is connected to the lifting supporting plate.

4. The cylinder head clamping tool according to claim 3, characterized in that: There are a plurality of lifting support nails, and the lifting positioning pins and the lifting support nails are both fixedly mounted on the lifting support plate.

5. The cylinder head clamping tool according to claim 1, characterized in that: A plurality of the second supporting nails are provided, and the second positioning pins and the second supporting nails are arranged around the lifting support plate.

6. The cylinder head clamping tool according to claim 1, characterized in that: The hydraulic cylinder is fixedly mounted on the top plate, the clamping rod is vertically arranged, and the bottom end of the clamping rod is fixedly connected to the piston shaft end of the hydraulic cylinder, and the top end of the clamping rod has an integrally formed clamping stopper.

7. The cylinder head clamping tool according to claim 6, characterized in that: The locking piece is provided with a U-shaped slot, and the locking piece is installed on the top of the clamping rod through the U-shaped slot. When in a clamping state, the locking piece abuts against the clamping stopper.

8. The cylinder head clamping tool according to any one of claims 1 to 7, characterized in that: A pressure-maintaining valve, an energy storage device and a sequence valve are installed on the base assembly.

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