Drilling machining clamp for automobile inverter shell

Abstract

The utility model designs the clamp which is stable, is suitable for rotation and works based on hydraulic pressure, so that the clamp is suitable for processing the front side surface, the top surface and the rear side surface of the automobile inverter shell at one time. An automobile inverter shell drilling machining clamp is characterized in that an oil liquid pipeline is arranged in a hoisting bottom plate, and a plurality of clamping mechanisms, a water spraying connector, a shell positioning device and a side pipe supporting frame are arranged on the hoisting bottom plate; the clamping mechanism comprises a lever oil cylinder and a supporting device. The lever oil cylinders and the corresponding supporting devices are arranged in a matched mode. Two supporting devices are arranged below the front side edge of the automobile inverter shell, and the setting points of the two supporting devices are located at the 1 / 3 point of the front side edge. A supporting device is arranged below the middle point of the rear side edge of the automobile inverter shell; the arrangement position of the shell positioning device is matched with the position of a hook on an automobile inverter shell, and the arrangement position of the side pipe supporting frame is matched with the position of a side pipe on the side edge of the automobile inverter shell.

Description

Technical Field

[0001] The utility model relates to the field of fixture design, and particularly to a drilling fixture for an automotive inverter housing. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional vehicle fuels as power sources (or use conventional vehicle fuels and adopt new in-vehicle power devices), integrating advanced technologies in vehicle power control and drive, and forming vehicles with advanced technical principles, new technologies, and new structures. Mainstream new energy vehicles generally refer to pure battery vehicles. An important component in pure battery vehicles is the inverter, which is crucial for the battery to drive the motor and for AC power storage. As Figure 2 shown is the upper housing of an automotive inverter. It can be seen from the figure that there are rib plates inside the housing that divide the space formed by the housing into multiple chambers for placing different devices. And almost all chambers require 1 - 2 through - holes to be drilled on the main surface of the housing. In addition, there are 3 rectangular holes to be processed on the front side of the housing, and there are also two round holes for the cooling circuit to be processed on the rear side. If the traditional fixture method is used, at least 3 sets of fixtures are required for 3 machining surfaces. Summary of the Invention

[0003] The utility model designs a stable and rotatable fixture based on hydraulic work to be applicable to machining the front side, top surface, and rear side of an automotive inverter housing at one time.

[0004] A drilling fixture for an automotive inverter housing is provided with an oil pipeline inside a hoisting bottom plate, and on the hoisting bottom plate are provided: a number of clamping mechanisms, a water spraying joint, a housing positioning device, and a side pipe support frame;

[0005] Among them, the clamping mechanism includes: a lever oil cylinder and a support device; the lever oil cylinder and the corresponding support device are arranged in a matching manner;

[0006] Around two corners of the left long side of the automotive inverter housing, one clamping mechanism is provided at each corner, and a fourth clamping mechanism is provided at the mid - point of the left long side;

[0007] Around two corners of the right long side of the automotive inverter housing, one clamping mechanism is provided at each corner;

[0008] Two support devices are provided below the front side of the automotive inverter housing, and the setting points of these two support devices are at the 1 / 3 point of the front side;

[0009] One support device is provided below the mid - point of the rear side of the automotive inverter housing;

[0010] The installation position of the housing positioning device matches the position of the hooks on the housing of the automotive inverter. The number of the housing positioning devices is greater than or equal to 2, and at least one pair is arranged diagonally.

[0011] The installation position of the side pipe support frame matches the position of the side pipes on the side of the housing of the automotive inverter.

[0012] When using the fixture of the present utility model, the spacing of all the clamping mechanisms is adjusted according to the adapted housing of the automotive inverter. First, the lever oil cylinder in the clamping mechanism is in the open position, and then the housing of the automotive inverter is placed into the fixture. According to the diagonally arranged housing positioning devices, the four original feet for fixing the housing on the housing of the automotive inverter will be positioned. On this basis, the side pipes for wire routing on the left and right sides will be placed on the side pipe support frames.

[0013] The side pipes are hollow cylinders, and the top surface of the side pipe support frame is cut into a semi-circular shape. At this time, the position is basically determined, and the lever oil cylinder switches to the downward pressure state, and the position is determined by the cooperation of the lever oil cylinder and the corresponding support device. Since the support devices all have a certain degree of adjustability, they can be adapted to the housings of automotive inverters with different thicknesses. After clamping, the housing positioning device further positions the housing of the automotive inverter in the horizontal direction to prevent the displacement of the housing of the automotive inverter during the rotation of the fixture.

[0014] Preferably, the support devices include three types;

[0015] Among them, the clamping mechanisms on the right side all adopt the second type of support device;

[0016] Among them, the clamping mechanisms at the left corners, the support devices below the front side, and the support devices below the rear side adopt the first type of support device

[0017] The fourth clamping mechanism adopts the third type of support device.

[0018] The first type of support device includes an installation base. A blind hole is provided on the top surface of the installation base, a fixed sleeve is inserted into the blind hole, and a piston top block is installed in the fixed sleeve;

[0019] The piston top block includes two parts: the first part is a cylindrical top block, and the second part is an oblong spherical piston, and the two are coaxially connected;

[0020] The diameter of the cylindrical top block is greater than the inner diameter of the fixed sleeve and is arranged on the top surface of the fixed sleeve;

[0021] The oblong spherical piston is inserted into the fixed sleeve and cooperates with the fixed sleeve to work;

[0022] A necking is provided on the bottom surface of the fixed sleeve, and the inner diameter of the necking is smaller than the inner diameter of the fixed sleeve.

[0023] When the blind hole and the fixing sleeve cooperate with the piston top block, a cavity will be formed, and the compressed air or compressed liquid inside can make the upper end face of the first type of support device flexible to adapt to different automotive inverter housings.

[0024] The second type of support device includes a frustum-shaped base. A mounting hole is coaxially arranged inside the frustum-shaped base. The mounting hole is divided into two upper and lower sections. The inner diameter of the upper section is larger than that of the lower section.

[0025] A piston top head is inserted into the mounting hole. The piston top head includes three sections. The top section is used for support, and its diameter is smaller than that of the middle section. The diameter of the middle section matches the upper section of the mounting hole. The length of the middle section is smaller than the length of the upper section of the mounting hole. The length of the bottom section is greater than or equal to the length of the lower section of the mounting hole, and at least one sealing ring is sleeved on the bottom section.

[0026] A pipeline is arranged inside the piston top head. The pipeline is coaxial with the piston top head. The pipeline includes an output pipe and an input pipe. The output pipe and the input pipe are connected. The diameter of the output pipe is 1 / 4 of that of the input pipe.

[0027] When the piston top head cooperates with the mounting hole, the gap between the bottom section of the piston top head and the inside of the mounting hole is suitable for compressed air or liquid to ensure that the piston top head has a certain flexibility. The pipeline inside the piston top head is used for detecting the support stability. When the automotive inverter housing is fully compacted at the tip of the piston top head, the small hole is sealed, and the air pressure gauge or air flow meter at the gas input end can judge the clamping in-place situation. When it is not fully sealed, the gas can push the piston top head towards the sealing trend.

[0028] The support device corresponding to the fourth clamping mechanism uses the third type of support device. The third type of support device includes a seat body, which is divided into three sections: the first frustum, the first cylinder, and the second cylinder; the three are coaxially arranged, and the diameter of the second cylinder matches the diameter of the support point of the automotive inverter housing.

[0029] Two pipelines are arranged on the seat body. Among them, the first pipeline runs through from the top surface of the first cylinder to the ground of the first frustum; the second pipeline includes an output pipe drilled downward from the axis of the top surface of the second cylinder, an input pipe drilled upward from the ground of the first frustum into the seat body, and a connecting pipe connecting the output pipe and the input pipe from the side surface of the first frustum.

[0030] The connecting pipe is blocked with a plug.

[0031] The diameter of the output pipe is 1 / 4 of that of the input pipe.

[0032] Among them, the first pipeline is used for spraying water, thereby reducing the use of water spraying joints on the plate surface, and at the same time, it is also convenient to directly spray water for cooling at the processing location during processing. The second pipeline is used for detecting the support point. The in-place situation of the clamping can be judged through the air pressure gauge or air flow meter at the gas input end.

[0033] Preferably, the housing positioning device includes: a positioning seat disposed on and penetrating through the hoisting bottom plate;

[0034] a thrust oil cylinder disposed on the bottom surface of the hoisting bottom plate and matching with the positioning seat in position;

[0035] a main push rod sleeved in the positioning seat, with the bottom end of the rod inserted into the push port of the thrust oil cylinder and a counterbore provided at the top end of the rod;

[0036] a secondary push rod including two sections, the upper section being frustum-shaped and the lower section being a hollow cylinder; the outer diameter of the lower section is the same as the diameter of the upper surface of the frustum, and the secondary push rod is inserted into the counterbore of the main push rod.

[0037] The lever active surfaces of the lever oil cylinders are all parallel to the long side of the hoisting bottom plate;

[0038] The active ends of the lever oil cylinders are bent on the horizontal plane and extend above the central axis of the corresponding support device.

[0039] The beneficial effects of the present utility model are as follows: It can maintain stability after clamping. Even if the hoisting base rotates by 90 degrees, the position of the clamped automotive inverter housing can still be determined, thereby reducing the production of defective products. When using this fixture, the processing procedure can be reduced, and the three sides of the automotive inverter housing can be processed by one-time hoisting and clamping, which is beneficial to improving the production speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Front side view of the present utility model when hoisting bottom plate clamps Figure 2 the shown automotive inverter housing;

[0041] Figure 2 Front and back views of the automotive inverter to be produced in the embodiment;

[0042] Figure 3 Assembly drawing of the hoisting bottom plate of the present utility model installed on the machine tool turntable base;

[0043] Figure 4 Top view of the assembly of the hoisting bottom plate of the present utility model;

[0044] Figure 5 Cross-sectional view of the second type of support device of the present utility model;

[0045] Figure 6 Cross-sectional view of the first type of support device of the present utility model;

[0046] Figure 7 Cross-sectional view of the housing positioning device of the present utility model;

[0047] Figure 8 Cross-sectional view of the third type of support device of the present utility model;

[0048] In the figure: A is an automotive inverter, B is a turntable base, 100 is a hoisting bottom plate, 201 is a lever oil cylinder, 3 is a water spraying joint, 310 is a first type of supporting device, 311 is a piston top block, 312 is a fixed sleeve, 313 is a mounting base, 320 is a second type of supporting device, 321 is a piston top head, 322 is a frustum-shaped base, 330 is a third type of supporting device, 410 is a housing positioning device, 411 is a secondary push rod, 412 is a main push rod, 413 is a positioning seat, and 420 is a thrust oil cylinder. Detailed implementation mode

[0049] The technical solution of the present utility model will be further specifically described below through specific embodiments in conjunction with the accompanying drawings.

[0050] Embodiment 1

[0051] As Figure 1 、 Figure 3 and Figure 4 shown, a drilling fixture for an automotive inverter housing is applicable to the automotive inverter housing shown in Figure 2 The hoisting bottom plate 100 of the drilling fixture for the automotive inverter housing is provided with a hydraulic pipeline, and the hoisting bottom plate is installed on the turntable base B of the numerical control machine tool through a lifting ring. The following are provided on the hoisting bottom plate: a plurality of clamping mechanisms, a water spraying joint 3, a housing positioning device 410, and a side pipe support 4;

[0052] Among them, the clamping mechanism includes: a lever oil cylinder 201 and a supporting device; the lever oil cylinder 201 and the corresponding supporting device are arranged in a matching manner; around the two corners of the left long side of the automotive inverter housing, one clamping mechanism is provided at each corner, and a fourth clamping mechanism is provided at the midpoint of the left long side;

[0053] Around the two corners of the right long side of the automotive inverter housing, one clamping mechanism is provided at each corner;

[0054] Two supporting devices are provided below the front side of the automotive inverter housing, and the setting points of these two supporting devices are at the 1 / 3 point of the front side;

[0055] One supporting device is provided below the midpoint of the rear side of the automotive inverter housing;

[0056] The installation position of the housing positioning device matches the position of the hook on the automotive inverter housing, and the number of housing positioning devices is equal to 2; they are arranged diagonally below the left front support foot and the right rear support foot.

[0057] The installation position of the side pipe support 4 matches the position of the side pipe on the side of the automotive inverter housing.

[0058] As Figure 5 、 Figure 6 and Figure 8The support devices shown include three categories;

[0059] Among them, the clamping mechanisms on the right side all adopt the second type of support device;

[0060] Among them, the clamping mechanisms on the left side edges, the support devices below the front side, and the support devices below the rear side adopt the first type of support device

[0061] The fourth clamping mechanism adopts the third type of support device.

[0062] As Figure 1 and Figure 3 shown, there is also a protrusion for output on the front side of the automotive inverter housing A, and the support device below the corresponding front side also moves forward. After moving, it still maintains the horizontal position at the 1 / 3 point of the front side. The first type of support device 310 includes a mounting base 313. A blind hole is provided on the top surface of the mounting base, and a fixed sleeve 312 is inserted into the blind hole. A piston top block 311 is installed inside the fixed sleeve;

[0063] The piston top block includes two parts: the first part is a cylindrical top block, and the second part is an oblong spherical piston. The two are coaxial and connected;

[0064] The diameter of the cylindrical top block is larger than the inner diameter of the fixed sleeve and is arranged on the top surface of the fixed sleeve;

[0065] The oblong spherical piston is inserted into the fixed sleeve and cooperates with the fixed sleeve for operation;

[0066] The bottom surface of the fixed sleeve is provided with a constriction, and the inner diameter of the constriction is smaller than the inner diameter of the fixed sleeve.

[0067] When the blind hole and the fixed sleeve cooperate with the piston top block, a cavity will be formed, and the compressed air or compressed liquid inside can make the upper end surface of the first type of support device flexible to adapt to different automotive inverter housings.

[0068] The second type of support device 320 includes a frustum-shaped base 322. An installation hole is coaxially arranged inside the frustum-shaped base. The installation hole is divided into upper and lower sections, and the inner diameter of the upper section is larger than that of the lower section;

[0069] A piston top head 321 is inserted into the installation hole. The piston top head includes three sections. The diameter of the top section for support is smaller than that of the middle section. The diameter of the middle section matches the upper section of the installation hole. The length of the middle section is smaller than the length of the upper section of the installation hole. The length of the bottom section is greater than or equal to the length of the lower section of the installation hole, and at least one sealing ring is sleeved on the bottom section;

[0070] A pipeline is arranged inside the piston top head. The pipeline is coaxial with the piston top head. The pipeline includes an output pipe and an input pipe. The output pipe and the input pipe are connected. The diameter of the output pipe is 1 / 4 of that of the input pipe.

[0071] When the piston head is fitted with the mounting hole, the clearance between the bottom section of the piston head and the inside of the mounting hole is suitable for compressed air or liquid to ensure that the piston head has a certain flexibility. The pipeline inside the piston head is used for detecting the support stability. When the automotive inverter housing is fully pressed on the tip of the piston head, the small hole is sealed, and the air pressure gauge or air flow meter at the gas input end can determine the clamping in-place situation. When it is not fully sealed, the gas can push the piston head towards the sealing trend.

[0072] The support device corresponding to the fourth clamping mechanism uses the third type of support device 330. The third type of support device includes a seat body, which is divided into three sections: the first frustum, the first cylinder, and the second cylinder; the three are coaxially arranged, and the diameter of the second cylinder matches the diameter of the support point of the automotive inverter housing.

[0073] There are two pipelines arranged on the seat body. Among them, the first pipeline penetrates from the top surface of the first cylinder to the bottom surface of the first frustum; the second pipeline includes an output pipe drilled downward from the axis of the top surface of the second cylinder, an input pipe drilled upward from the bottom surface of the first frustum into the seat body, and a connecting pipe connecting the output pipe and the input pipe on the side surface of the first frustum.

[0074] The connecting pipe is blocked with a plug.

[0075] The diameter of the output pipe is 1 / 4 of that of the input pipe.

[0076] Among them, the first pipeline is used for spraying water, so as to reduce the use of water spraying joints on the plate surface and also facilitate direct water spraying and cooling of the processing area during processing. The second pipeline is used for detecting the support point, and the in-place situation of the clamping can be judged through the air pressure gauge or air flow meter at the gas input end.

[0077] Such as Figure 7 The shown housing positioning device includes: a positioning seat 413, which is arranged on the hoisting bottom plate and penetrates the hoisting bottom plate.

[0078] A thrust oil cylinder 420, which is arranged on the bottom surface of the hoisting bottom plate, and its position matches that of the positioning seat.

[0079] A main push rod 412, which is sleeved inside the positioning seat, the bottom end of the rod is inserted into the push port of the thrust oil cylinder, and a counterbore is arranged at the top end of the rod.

[0080] A secondary push rod 411, which includes two sections. The upper section is frustum-shaped, and the lower section is a hollow cylinder; the outer diameter of the lower section is the same as the diameter of the upper surface of the frustum. The secondary push rod is inserted into the counterbore of the main push rod.

[0081] The lever moving surfaces of the lever oil cylinder 201 are all parallel to the long side of the hoisting bottom plate.

[0082] The moving end of the lever oil cylinder 201 bends on the horizontal plane and extends above the axis of the corresponding support device. From Figure 4It can be seen that for the lever oil cylinder 201 on the right rear side, the movable end thereof bends 45° forward from the lever shaft and forms a rounded triangle at the end for clamping. For the lever oil cylinder 201 on the left front side, the movable end thereof bends 45° backward from the lever shaft and forms a rounded triangle at the end.

Claims

1. An automotive inverter housing drilling fixture, characterized in that, There is an oil pipeline arranged inside the hoisting bottom plate, and on the hoisting bottom plate are arranged: several clamping mechanisms, a water spraying joint, a housing positioning device, and a side pipe support bracket; Among them, the clamping mechanism includes: a lever oil cylinder and a support device; the lever oil cylinder and the corresponding support device are arranged in a matching manner; Around the two corners of the left long side of the automotive inverter housing, one clamping mechanism is arranged at each corner, and a fourth clamping mechanism is arranged at the midpoint of the left long side; Around the two corners of the right long side of the automotive inverter housing, one clamping mechanism is arranged at each corner; Two support devices are arranged below the front side of the automotive inverter housing, and the setting points of these two support devices are at the 1 / 3 point of the front side; One support device is arranged below the midpoint of the rear side of the automotive inverter housing; The setting position of the housing positioning device matches the position of the hook on the automotive inverter housing. The number of housing positioning devices is greater than or equal to 2, and at least one pair is arranged diagonally; The setting position of the side pipe support bracket matches the position of the side pipe on the side of the automotive inverter housing.

2. The drilling fixture for an automotive inverter housing according to claim 1, characterized in that, The support device includes three types; Among them, the clamping mechanisms on the right side all adopt the second type of support device; Among them, the clamping mechanisms at the left corners, the support devices below the front side, and the support devices below the rear side adopt the first type of support device The fourth clamping mechanism adopts the third type of support device; The first type of support device includes an installation base. A blind hole is arranged on the top surface of the installation base. A fixed sleeve is inserted into the blind hole, and a piston top block is installed inside the fixed sleeve; The piston top block includes two parts: the first part is a cylindrical top block, and the second part is a long waist spherical piston. The two are coaxially connected; The diameter of the cylindrical top block is larger than the inner diameter of the fixed sleeve and is arranged on the top surface of the fixed sleeve; The long waist spherical piston is inserted into the fixed sleeve and works in cooperation with the fixed sleeve; A constriction is arranged at the bottom surface of the fixed sleeve, and the inner diameter of the constriction is smaller than the inner diameter of the fixed sleeve; The second type of support device includes a frustum-shaped base. An installation hole is coaxially arranged inside the frustum-shaped base. The installation hole is divided into upper and lower sections, and the inner diameter of the upper section is larger than that of the lower section; A piston top head is inserted into the installation hole. The piston top head includes three sections. The top section is used for support, the diameter of the top section is smaller than that of the middle section, the diameter of the middle section matches the upper section of the installation hole, the length of the middle section is smaller than the length of the upper section of the installation hole, the length of the bottom section is greater than or equal to the length of the lower section of the installation hole, and at least one sealing ring is sleeved on the bottom section; A pipeline is arranged inside the piston top head. The pipeline is coaxial with the piston top head. The pipeline includes an output pipe and an input pipe. The output pipe and the input pipe are communicated, and the diameter of the output pipe is 1 / 4 of that of the input pipe; The support device corresponding to the fourth clamping mechanism uses the third type of support device. The third type of support device includes a seat body, which is divided into three sections: the first frustum, the first cylinder, and the second cylinder; the three are coaxially arranged, and the diameter of the second cylinder matches the diameter of the support point of the automotive inverter housing; Two pipelines are arranged on the seat body. Among them, the first pipeline penetrates from the top surface of the first cylinder to the ground of the first frustum; the second pipeline includes an output pipe drilled downward from the center of the top surface of the second cylinder, an input pipe drilled upward from the ground of the first frustum into the seat body, and a connecting pipe connecting the output pipe and the input pipe from the side surface of the first frustum; The connecting pipe is blocked with a plug; The diameter of the output pipe is 1 / 4 of that of the input pipe.

3. The drilling fixture for the automotive inverter housing according to claim 1, characterized in that, The housing positioning device includes: a positioning seat, which is arranged on the hoisting bottom plate and penetrates the hoisting bottom plate; a thrust oil cylinder, which is arranged on the bottom surface of the hoisting bottom plate and is matched with the positioning seat in position; a main push rod, which is sleeved in the positioning seat, the bottom end of the rod is inserted into the push port of the thrust oil cylinder, and a counterbore is arranged at the top end of the rod; a secondary push rod, which includes two sections, the upper section is frustum-shaped, and the lower section is a hollow cylinder; the outer diameter of the lower section is the same as the diameter of the upper surface of the frustum, and the secondary push rod is inserted into the counterbore of the main push rod.

4. A drilling fixture for an automotive inverter housing according to claim 1, characterized in that, The lever moving surfaces of the lever oil cylinders are all parallel to the long side of the hoisting bottom plate; The moving end of the lever oil cylinder bends on the horizontal plane and extends above the central axis of the corresponding support device.

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