A crankcase four-axis hydraulic clamp

Abstract

This utility model discloses a four-axis hydraulic clamp for crankshaft housings, comprising a four-axis rotary table and a clamping mechanism disposed on the rotary table. The clamping mechanism includes a clamping seat fixed to the rotating end of the rotary table and a telescopic drive component disposed on the clamping seat. The clamping seat has a U-shaped plate structure with the U-shaped opening direction perpendicular to the rotation axis of the rotary table. A positioning seat and at least one positioning pin are disposed on one inner wall of the clamping seat, and the positioning seat has a positioning surface. The telescopic drive component is disposed on the inner wall of the clamping seat on the other side away from the positioning seat. The telescopic movement direction of the telescopic drive component is parallel to the rotation axis of the rotary table. The telescopic drive component is used to press the workpiece to be processed against the positioning surface. The workpiece to be processed has a corresponding number of slots corresponding to at least one positioning pin, and the positioning pin is inserted into the slot. This utility model can improve the clamping and fixing efficiency and processing efficiency during crankshaft housing processing.

Description

Technical Field

[0001] This utility model relates to the technical field of clamps, and in particular to a four-axis hydraulic clamp for crankcases. Background Technology

[0002] The crankcase is an important component of an engine, primarily used to mount the crankshaft and provide the space for its operation. The crankcase is typically divided into two parts: the upper crankcase and the lower crankcase. The upper crankcase is cast integrally with the cylinder block, while the lower crankcase stores lubricating oil and seals the upper crankcase.

[0003] Before the crankcase is assembled, it requires machining processes such as drilling or tapping on the sides of the case, and usually requires machining of parts of the case in multiple directions (see...). Figure 1 During processing, fixtures and tools are required to clamp and fix the crankshaft housing.

[0004] Typically, machining a workpiece (crankshaft housing) on ​​multiple machining centers requires designing a set of tooling for each machining center, and then sequentially installing the machining centers onto the corresponding tooling for clamping and fixing. This necessitates multiple assembly and disassembly operations during engine housing machining, resulting in low machine tool utilization and high labor costs. Furthermore, the high cost of multiple tooling sets is detrimental to market competitiveness. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a four-axis hydraulic clamp for crankcases, which can improve the clamping and fixing efficiency and processing efficiency during crankcase machining.

[0006] To solve the above-mentioned technical problems, the crankshaft housing four-axis hydraulic clamp provided by this utility model adopts the following technical solution: A four-axis hydraulic clamp for crankshaft housings includes a four-axis rotary table and a clamping mechanism disposed on the rotary table. The clamping mechanism includes a clamping seat fixed to the rotating end of the rotary table and a telescopic drive component disposed on the clamping seat. The clamping seat has a U-shaped plate structure with the U-shaped opening direction perpendicular to the rotation axis of the rotary table. A positioning seat and at least one positioning pin are disposed on one inner wall of the clamping seat, and the positioning seat has a positioning surface. The telescopic drive component is disposed on the inner wall of the clamping seat on the other side away from the positioning seat. The telescopic movement direction of the telescopic drive component is parallel to the rotation axis of the rotary table. The telescopic drive component is used to press the workpiece to be processed against the positioning surface. The workpiece to be processed has a corresponding number of slots corresponding to at least one positioning pin, and the positioning pin is inserted into the slot.

[0007] By employing the above technical solution, the crankshaft housing is placed within the U-shaped opening of the clamping seat, with the locating pin inserted into the slot to position the crankshaft housing relative to the clamping seat. The telescopic drive is then activated to press the crankshaft housing against the locating surface. After pressing, the machine tool is instructed by program commands to machine one of the crankshaft housing's machining areas. After machining, the four-axis rotary table rotates the clamping seat by an angle to turn the other machining area of ​​the crankshaft housing towards the machine tool, allowing the machine tool to machine that other machining area, and so on. After all machining areas of the crankshaft housing are completed, the telescopic drive retracts, no longer pressing the workpiece, the crankshaft housing is removed, and the next crankshaft housing to be machined is installed, starting the next work cycle.

[0008] The above process enables the machine tool to process multiple parts of the crankcase by only disassembling and assembling the crankcase relative to the fixture once, eliminating multiple disassembly and assembly steps and multiple sets of tooling. This improves the clamping and fixing efficiency of the crankcase and the processing efficiency, and increases the time utilization rate of the machine tool and the workers by a factor of two, thereby greatly reducing costs and improving efficiency.

[0009] Optionally, the number of positioning seats is at least two.

[0010] By adopting the above technical solution, at least two positioning seats can stably support and position the crankcase.

[0011] Optionally, the number of positioning pins is two, and the two positioning pins are respectively located on both sides of the telescopic movement direction of the telescopic drive member.

[0012] By adopting the above technical solution, the positioning pin can position the crankshaft housing and the clamping seat, so that after the telescopic drive component presses the crankshaft housing, the position of the crankshaft housing relative to the clamping seat can be correct; in addition, the positioning pin can prevent the crankshaft housing from moving or displacing relative to each other during the processing, ensuring the stability of the processing.

[0013] Optionally, the telescopic drive component is a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder, and the movable rod of the telescopic drive component is parallel to the rotation axis of the four-axis turntable.

[0014] By adopting the above technical solutions, hydraulic cylinders, pneumatic cylinders, or electric push cylinders can all press the crankcase against the positioning surface by the displacement of the movable rod.

[0015] Optionally, the movable rod of the telescopic drive component is vertically fixed with a pressure plate.

[0016] By adopting the above technical solution, the pressure plate makes the force applied to the crankcase more uniform, so as to more stably press the crankcase against the positioning surface, making the clamping and fixing of the crankcase more secure.

[0017] Optionally, the pressure plate has an insertion hole, and the workpiece to be processed has a pin corresponding to the insertion hole. When the pressure plate is pressed against the workpiece to be processed, the pin is inserted into the insertion hole.

[0018] By adopting the above technical solution, the displacement of the crankcase relative to the pressure plate is restricted by inserting the pin into the insertion hole, so that the pressure plate is pressed more stably against the crankcase, making the clamping and fixing of the crankcase more secure.

[0019] Optionally, the inner wall of the clamping seat on the side away from the telescopic drive member is provided with a limiting member, which is used to limit the displacement of the workpiece to be processed during rotation.

[0020] By adopting the above technical solution, the limiting component restricts the displacement of the crankcase during rotation, making the clamping and fixing of the crankcase more stable, thereby improving the stability of the crankcase during processing.

[0021] Optionally, the number of clamping mechanisms is at least one, and the clamping seats of at least one clamping mechanism are arranged sequentially along the rotation center axis of the four-axis turntable and fixedly connected, with the clamping seats at the first end and the last end respectively fixed to the rotating end of the four-axis turntable.

[0022] By adopting the above technical solution, at least one clamping mechanism is set on the four-axis rotary table. Each clamping mechanism clamps a crankshaft housing. Under the same rotation angle, the machine tool can simultaneously process one of the processing parts of at least one crankshaft housing, which further improves the clamping and fixing efficiency of the crankshaft housing and the processing efficiency.

[0023] Optionally, the number of clamping mechanisms is two.

[0024] In summary, this utility model has at least one of the following beneficial technical effects: 1. The above process enables the machine tool to process multiple parts of the crankcase by only disassembling and assembling the crankcase relative to the fixture once, eliminating multiple disassembly and assembly steps and multiple sets of tooling, thereby improving the clamping and fixing efficiency of the crankcase and the processing efficiency. The time utilization rate of the machine tool and the worker is increased many times, which greatly reduces costs and improves efficiency. 2. At least one clamping mechanism is provided on the four-axis rotary table. Each clamping mechanism clamps a crankshaft housing. Under the same rotation angle, the machine tool can simultaneously process one of the machining parts of at least one crankshaft housing, which further improves the clamping and fixing efficiency of the crankshaft housing and the machining efficiency. Attached Figure Description

[0025] Figure 1This is a schematic diagram of the structure of the crankcase of this utility model.

[0026] Figure 2 This is a schematic diagram of the structure of a four-axis hydraulic clamp, which is used to demonstrate the present invention.

[0027] Figure 3 This is a schematic diagram of the assembly of the crankcase and the four-axis hydraulic clamp, which is used to demonstrate the present invention.

[0028] Explanation of reference numerals in the attached drawings: 1. Four-axis rotary table; 11. First lifting ring; 2. Clamping mechanism; 21. Clamping seat; 211. Second lifting ring; 22. Telescopic drive component; 3. Positioning seat; 4. Positioning pin; 5. Pressure plate; 51. Insertion hole; 6. Limiting component; 61. Limiting plate; 8. Crankshaft housing; 81. Machining part. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-3 This utility model will be described in further detail.

[0030] This utility model discloses a four-axis hydraulic clamp for a crankcase. (Refer to...) Figure 2 The crankcase four-axis hydraulic clamp includes a four-axis turntable 1 and two clamping mechanisms 2, both of which are located at the rotating end of the four-axis turntable 1. The four-axis turntable 1 is fixedly equipped with a first lifting ring 11 to facilitate the movement of the four-axis turntable 1.

[0031] Reference Figure 2 and Figure 3 The clamping mechanism 2 includes a clamping seat 21 and a telescopic drive component 22. The clamping seat 21 has a U-shaped cross-sectional profile, and the U-shaped opening of the clamping seat 21 is perpendicular to the rotation axis of the four-axis turntable 1. The clamping seats 21 of the two clamping mechanisms 2 are arranged and fixedly connected along the rotation axis of the four-axis turntable 1. One clamping seat 21 is fixedly connected to one rotating end of the four-axis turntable 1, and the other clamping seat 21 is fixedly connected to the other rotating end of the four-axis turntable 1. Both clamping seats 21 are fixedly connected to a second lifting ring 211 to facilitate the movement of the clamping seat 21.

[0032] Reference Figure 2 and Figure 3 The clamping seat 21 has at least two positioning seats 3 on one inner wall, and in this embodiment, four positioning seats 3 are provided. The four positioning seats 3 are distributed on one inner wall of the clamping seat 21. The positioning seats 3 have positioning surfaces that are parallel to one inner wall of the clamping seat 21. The inner wall of the clamping seat 21 with positioning seats 3 is also fixedly provided with at least one positioning pin 4, and in this embodiment, two positioning pins 4 are provided. The two positioning pins 4 are located on both sides of the rotation axis of the four-axis rotary table 1. The crankshaft housing 8 has a corresponding number of slots for the two positioning pins 4, and the positioning pins 4 are inserted into the slots of the crankshaft housing 8.

[0033] Reference Figure 2 and Figure 3 The telescopic drive component 22 is fixedly disposed on the inner wall of the clamping seat 21 on the side away from the positioning seat 3. The telescopic drive component 22 is a hydraulic cylinder, a pneumatic cylinder, or an electric push cylinder. In this embodiment, the telescopic drive component 22 is a hydraulic cylinder. The movable rod of the telescopic drive component 22 is parallel to the rotation axis of the four-axis turntable 1. A pressure plate 5 is vertically fixed to the end of the movable rod of the telescopic drive component 22. The pressure plate 5 makes the force applied to the crankshaft housing 8 more uniform, so as to more stably press the crankshaft housing 8 against the positioning surface.

[0034] Reference Figure 1 and Figure 3 The crankshaft housing 8 is placed in the U-shaped opening of the clamping seat 21, with the two locating pins 4 correspondingly inserted into the two slots. The locating pins 4 can position the crankshaft housing 8 and the clamping seat 21, ensuring that the crankshaft housing 8 is correctly positioned relative to the clamping seat 21 after the telescopic drive 22 presses the crankshaft housing 8. Furthermore, the locating pins 4 can prevent relative movement or displacement of the crankshaft housing 8 during processing, ensuring processing stability. After positioning, the telescopic drive 22 is activated, and the movable rod of the telescopic drive 22 extends, driving the pressure plate 5 to press the crankshaft housing 8 and simultaneously abut against the four locating surfaces. The four locating seats 3 can stably support and position the crankshaft housing 8.

[0035] After clamping, the machine tool is instructed by program commands to process one of the machining parts 81 of the crankcase 8. After machining, the four-axis rotary table 1 drives the clamping seat 21 to rotate by an angle, so that the other machining part 81 of the crankcase 8 is turned to the machine tool, allowing the machine tool to process the other machining part 81 of the crankcase 8, and so on. After all machining parts 81 of the crankcase 8 are completed, the telescopic drive 22 retracts and no longer clamps the workpiece to be processed. The crankcase 8 is removed, and the next crankcase 8 to be processed is reinstalled to start the next work cycle.

[0036] The above process allows the machine tool to process multiple machining parts 81 of the crankcase 8 with only one disassembly and assembly relative to the fixture, eliminating multiple disassembly and assembly steps and multiple sets of tooling. This improves the clamping and fixing efficiency of the crankcase 8 as well as the machining efficiency, significantly increasing the time utilization rate of the machine tool and the operator, thereby greatly reducing costs and improving efficiency. Furthermore, by setting two clamping mechanisms 2 on the four-axis rotary table 1, each clamping the crankcase 8, the machine tool can simultaneously process one machining part 81 of two crankcases 8 at the same rotation angle, further improving the clamping and fixing efficiency of the crankcase 8 as well as the machining efficiency.

[0037] Reference Figure 3To further enhance the stability of clamping and fixing the crankshaft housing 8, the pressure plate 5 has multiple insertion holes 51, and the crankshaft housing 8 has corresponding pins inserted into the insertion holes 51. When the pressure plate 5 is pressed against the workpiece to be processed, the pins are inserted into the corresponding insertion holes 51. By inserting the pins into the insertion holes 51, the displacement of the crankshaft housing 8 relative to the pressure plate 5 is restricted, so that the pressure plate 5 is pressed more stably against the crankshaft housing 8, making the clamping and fixing of the crankshaft housing 8 more secure.

[0038] Reference Figure 2 and Figure 3 A limiting element 6 is also provided on the inner wall of the clamping seat 21 on the side away from the telescopic drive member 22. The limiting element 6 includes two limiting plates 61, both of which are fixedly connected to one side of the inner wall of the clamping seat 21. The arrangement direction of the two limiting plates 61 is parallel to the U-shaped opening direction of the clamping seat 21, and both limiting plates 61 are set close to the edge of the inner wall of the clamping seat 21 parallel to the U-shaped opening direction. The two limiting plates 61 restrict the displacement of the crankshaft housing 8 during rotation, making the clamping and fixing of the crankshaft housing 8 more stable, thereby improving the stability of the crankshaft housing 8 during processing.

[0039] The implementation principle of the four-axis hydraulic clamp for crankshaft housing according to this utility model embodiment is as follows: The crankshaft housing 8 is placed in the U-shaped opening of the clamping seat 21, and the two positioning pins 4 are inserted into the two slots respectively. After positioning, the telescopic drive 22 is activated, the movable rod of the telescopic drive 22 extends, and drives the pressure plate 5 to press the crankshaft housing 8 tightly and simultaneously abut against the four positioning surfaces. The four positioning seats 3 can stably support and position the crankshaft housing 8.

[0040] After clamping, the machine tool is instructed by program commands to process one of the machining parts 81 of the crankcase 8. After machining, the four-axis rotary table 1 drives the clamping seat 21 to rotate by an angle, so that the other machining part 81 of the crankcase 8 is turned to the machine tool, allowing the machine tool to process the other machining part 81 of the crankcase 8, and so on. After all machining parts 81 of the crankcase 8 are completed, the telescopic drive 22 retracts and no longer clamps the workpiece to be processed. The crankcase 8 is removed, and the next crankcase 8 to be processed is reinstalled to start the next work cycle.

[0041] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A four-axis hydraulic fixture for a crankcase body, characterized by: The device includes a four-axis rotary table (1) and a clamping mechanism (2) disposed on the four-axis rotary table (1). The clamping mechanism (2) includes a clamping seat (21) fixed to the rotating end of the four-axis rotary table (1) and a telescopic drive member (22) disposed on the clamping seat (21). The clamping seat (21) has a U-shaped plate structure and the U-shaped opening direction is perpendicular to the rotation axis of the four-axis rotary table (1). A positioning seat (3) and at least one positioning pin (4) are provided on one inner wall of the clamping seat (21). The positioning seat (3) is provided with a positioning surface. The telescopic drive member (22) is disposed on the other inner wall of the clamping seat (21) away from the positioning seat (3). The telescopic movement direction of the telescopic drive member (22) is parallel to the rotation axis of the four-axis rotary table (1). The telescopic drive member (22) is used to press the workpiece to be processed and abut against the positioning surface. The workpiece to be processed has a corresponding number of slots corresponding to at least one positioning pin (4). The positioning pin (4) is inserted into the slot.

2. A four-axis hydraulic fixture for a crankcase body according to claim 1, characterized in that: The number of the positioning seats (3) is at least two.

3. A four-axis hydraulic fixture for a crankcase body according to claim 1, characterized in that: There are two positioning pins (4), and the two positioning pins (4) are located on both sides of the telescopic drive (22) in the telescopic movement direction.

4. A four-axis hydraulic fixture for a crankcase body according to any one of claims 1-3, characterized in that: The telescopic drive component (22) is a hydraulic cylinder, a pneumatic cylinder or an electric push cylinder, and the movable rod of the telescopic drive component (22) is parallel to the rotation axis of the four-axis turntable (1).

5. A four-axis hydraulic fixture for a crankcase body according to claim 4, characterized in that: The movable rod of the telescopic drive component (22) is vertically fixed with a pressure plate (5).

6. A four-axis hydraulic fixture for a crankcase body as claimed in claim 5, characterized in that: The pressure plate (5) has an insertion hole (51), and the workpiece to be processed has a pin corresponding to the insertion hole (51). When the pressure plate (5) is pressed against the workpiece to be processed, the pin is inserted into the insertion hole (51).

7. A four-axis hydraulic fixture for a crankcase body as claimed in any one of claims 1 to 3, wherein: The clamping seat (21) has a limiting member (6) on the inner wall of the side away from the telescopic drive member (22). The limiting member (6) is used to limit the displacement of the workpiece to be processed during rotation.

8. A four-axis hydraulic fixture for a crankcase body as claimed in any one of claims 1 to 3, wherein: The number of clamping mechanisms (2) is at least one, and the clamping seats (21) of at least one clamping mechanism (2) are arranged and fixedly connected along the rotation center axis of the four-axis turntable (1) in sequence. The clamping seats (21) at the beginning and end are respectively fixed to the rotation end of the four-axis turntable (1).

9. A four-axis hydraulic fixture for a crankcase body according to claim 8, characterized in that: The number of clamping mechanisms (2) is two.

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