Pneumatic horizontal type centering clamp for rear cover of variable displacement automobile air conditioner compressor

Abstract

A pneumatic horizontal centering clamp for a rear cover of a variable-displacement automobile air-conditioning compressor belongs to the field of automobile air-conditioning compressor processing tools and comprises a bottom plate, a positioning disc, a lever cylinder and a reference positioning rod, the positioning disc and the lever cylinder are respectively mounted on the bottom plate, a positioning plane is arranged at the upper end of the positioning disc, and a detachable positioning pin is mounted on the positioning plane. The two lever air cylinders keep synchronous linkage, pressing rods of the lever air cylinders are provided with abutting blocks, the reference positioning rod corresponds to the rear cover structure of the automobile air conditioner compressor and is also installed on the bottom plate at the same time, further, the bottom plate adopts the split design of the positioning bottom plate and the air cylinder bottom plate, and the positioning pin is detachably connected with the positioning disc. The adjustable bolt rod is selected as the abutting block, switching use can be conducted according to the structural difference of machine types, models and displacement of the rear cover of the automobile air conditioner compressor, high universality is achieved, meanwhile, clamping pressure is balanced, positioning precision is high, labor intensity is low, production cost can be reduced in production, product quality is guaranteed, and production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile air-conditioning compressor processing tooling, in particular to a pneumatic horizontal centering fixture for a rear cover of a variable displacement automobile air-conditioning compressor. Background Art

[0002] The rear cover of the automobile air-conditioning compressor is an important structural component of the automobile air-conditioning compressor. According to the differences in the design structure of different models, different forms of mechanical processing are required on specific parts of the casting embryo. A variable displacement automobile air-conditioning compressor rear cover, such as Figure 1 and Figure 2 As shown, the high-pressure valve hole 11 and the two assembly positioning holes 12 on the outer end face of the casting embryo need to be drilled, and the assembly positioning plane 13 needs to be milled. At present, the processing of the high-pressure valve hole 11, the assembly positioning hole 12 and the assembly positioning plane 13 on the rear cover of the variable displacement automobile air-conditioning compressor is all done using a simple manual horizontal centering fixture, which is manually positioned by workers, threaded and clamped on the processing station, and then processed in sequence. This clamping method not only has the disadvantages of high labor intensity, low positioning accuracy, and low disassembly and assembly efficiency, but also because the threaded tightening strength is difficult to accurately control, it is very easy to cause a large difference in the balance of clamping and pressing between different workpieces. This difference in the clamping and pressing state of the workpieces often causes fluctuations in the processing accuracy of the workpieces, reducing the stability of product quality. More importantly, the current fixtures are highly specialized. Different fixtures are required for the rear covers of automobile air-conditioning compressors of the same model with different models or displacements. The compatibility is poor, and a large number of fixtures are required in production. Moreover, the fixtures must be replaced when the processed products are switched, which results in high processing costs and high production consumption. Therefore, it is necessary to study and improve the fixtures for the rear covers of variable displacement automobile air-conditioning compressors currently used in production, enhance the versatility of the fixtures, improve positioning accuracy, increase clamping efficiency, and reduce labor intensity. Utility Model Content

[0003] The utility model aims to provide a pneumatic horizontal centering fixture for a rear cover of a variable displacement automobile air-conditioning compressor, so as to improve the positioning accuracy of workpieces, increase the clamping efficiency and reduce the labor intensity of workers.

[0004] A pneumatic horizontal centering fixture for a rear cover of a variable displacement automobile air-conditioning compressor, comprising: a base plate, a positioning plate, a lever cylinder and a reference positioning rod; the base plate can be fixedly mounted on a machining platform, the positioning plate and the two lever cylinders are arranged correspondingly to each other and are respectively fixedly mounted on the base plate; the upper end of the positioning plate has a horizontally arranged structural positioning plane, the positioning plane can form a corresponding match with the cylinder body connecting end face of the rear cover of the automobile air-conditioning compressor, and the rear cover of the automobile air-conditioning compressor is vertically positioned, at least two positioning pins are detachably arranged and installed on the positioning plane, the positioning pins can form a corresponding match with the positioning pin holes on the rear cover of the automobile air-conditioning compressor, and the rear cover of the automobile air-conditioning compressor is plane-positioned; the lever cylinder 4 has a pressure rod in a lever structure, the two lever cylinders maintain synchronous linkage, and realize synchronous mutual conversion between a release state and a clamping state, the release state is a structural state in which the working end of the pressure rod is lifted, and the clamping state is a structural state in which the working end of the pressure rod is returned, and the pressure rods are respectively arranged on the working end of the pressure rod. A pressing block is installed. In the pressed state, the pressing rod is synchronously flipped back. The two pressing blocks can cooperate to press against the pressure-bearing surface on the back side of the automobile air-conditioning compressor rear cover to fix and lock the automobile air-conditioning compressor rear cover positioned on the positioning plate. At this time, the high-pressure valve hole, assembly positioning hole and assembly positioning plane on the outer end face of the automobile air-conditioning compressor rear cover can be machined in sequence; the two reference positioning rods are arranged on the positioning base plate and respectively correspond to the two sides of the intake and exhaust columns protruding from the outer circumference on the automobile air-conditioning compressor rear cover positioned on the positioning plate, so as to prompt the operator to place the automobile air-conditioning compressor rear cover on the positioning plate in the initial direction. During production, after the operator directly places the intake and exhaust columns on the automobile air-conditioning compressor rear cover between the two reference positioning rods, it is easy to find the corresponding positions of the positioning pin holes on the automobile air-conditioning compressor rear cover and the positioning pins on the positioning plate, thereby reducing the swing amplitude of the installation calibration of the automobile air-conditioning compressor rear cover, reducing the installation difficulty, shortening the installation time and improving the processing efficiency.

[0005] The pneumatic horizontal centering fixture for the rear cover of a variable-displacement automobile air-conditioning compressor preferably has a split structure for the base plate, including: a positioning base plate and two cylinder base plates, the positioning plate and the two lever cylinders are respectively mounted on the positioning base plate and the two cylinder base plates, the positioning base plate and the cylinder base plate can be arranged corresponding to each other and are respectively fixedly mounted on the machining platform.

[0006] The pneumatic horizontal centering fixture for the rear cover of a variable-displacement automobile air-conditioning compressor also includes: a hand-pull valve, which is a two-position linkage control valve, fixedly connected to the positioning base plate or any one of the cylinder base plates, and can control the two pressure rods to flip synchronously, so that the lever cylinder can synchronously transform between the release state and the clamping state.

[0007] In the pneumatic horizontal centering clamp for the rear cover of a variable-displacement automobile air-conditioning compressor, the pressure block is preferably a bolt rod with the end head as the pressure surface, and the bolt rods are respectively threadedly mounted on the pressure rod in a corresponding manner. By screwing the bolt rod in and out relative to the pressure rod, the pressure height of the bolt rod, that is, the extension distance of the front end face of the bolt rod relative to the pressure rod, can be adjusted to meet the requirements of the pressure block action height due to differences in the structures of rear covers of automobile air-conditioning compressors of the same model but different types or different displacements, thereby enhancing the versatility of the universal pneumatic horizontal centering clamp for the rear cover of a variable-displacement automobile air-conditioning compressor.

[0008] The beneficial effect of the utility model is to provide a pneumatic horizontal centering fixture for the rear cover of a variable displacement automobile air-conditioning compressor, the bottom plate adopts a split design in which the positioning bottom plate is separated from the cylinder bottom plate, the positioning pin is detachably mounted on the positioning plate and the bolt rod with convenient adjustment of the pressing height is used as a pressing block, and by replacing and adjusting the structural components, the processing scenarios can be switched according to the structural differences of the rear covers of automobile air-conditioning compressors of different models or different displacements of the same model, so that a set of fixtures can be simultaneously used for the processing of rear covers of automobile air-conditioning compressors of different models or different displacements, and has strong versatility, which can facilitate the maintenance of the tooling fixture, and is more conducive to reducing production costs and improving processing efficiency. At the same time, the fixture adopts a pneumatically controlled clamping method to fix the workpiece, which has the advantages of balanced clamping pressure, high positioning accuracy, and low labor intensity. The installation of the reference positioning rod is also conducive to shortening the positioning time of the processing workpiece, improving the clamping speed, and ensuring the product processing quality in actual production, and further improving the processing efficiency of the rear cover of the automobile air-conditioning compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is the structural diagram of the outer end face of the rear cover of a variable displacement automobile air-conditioning compressor.

[0010] Figure 2 This is the structural diagram of the end face of the rear cover cylinder connection of the variable displacement automobile air-conditioning compressor.

[0011] Figure 3 This is a three-dimensional structural diagram of the pneumatic horizontal centering fixture for the rear cover of a variable-displacement automobile air-conditioning compressor when the workpiece is not clamped.

[0012] Figure 4 This is a three-dimensional structural diagram of the workpiece clamping state of the pneumatic horizontal centering fixture for the rear cover of a variable-displacement automobile air-conditioning compressor.

[0013] Figure 5 A top view of the workpiece clamped by the pneumatic horizontal centering fixture for the rear cover of a variable displacement automobile air-conditioning compressor DETAILED DESCRIPTION

[0014] Furthermore, the technical solution for which protection is sought in the present utility model is described in detail in conjunction with specific embodiments and the accompanying drawings.

[0015] A pneumatic horizontal centering fixture for the rear cover of a variable displacement automobile air-conditioning compressor, such as Figures 3 to 5 As shown, it is composed of a positioning base plate 1, a cylinder base plate 2, a positioning plate 3, a lever cylinder 4, a reference positioning rod 9 and a hand-pull valve 16; the positioning base plate 1 and the cylinder base plate 2 are both basic base plates, the positioning plate 3 is fixedly mounted on the positioning base plate 1, and the lever cylinder 4 is fixedly mounted on the cylinder base plate 2 respectively; the positioning plate 3 is composed of a combination of three protrusions to facilitate the drainage and cleaning of processing waste chips, and the upper ends of the three protrusions are combined to form a structural positioning plane, and two embedding holes are opened on the positioning plane, and positioning pins 5 are respectively embedded in the embedding holes; the lever cylinder 4 has a pressure rod 6 in a lever structure, and bolt rods 7 as pressure blocks are respectively installed on the working ends of the pressure rod 6, and the bolt rod 7 passes through the pressure rod 6, and the upper and lower ends of the pressure rod 6 on the bolt rod 7 are respectively matched A fixing nut 8 is installed to position and lock the bolt rod 7 on the pressure rod 6; the hand-pull valve 16 is a two-position linkage control valve, which is fixedly connected to the positioning base plate 1 through a transition of a connecting plate 17, and can implement linkage control on the two lever cylinders 4, and two control positions are set to correspond to the release state and the compression state of the lever cylinders 4 respectively. Changing the control position can make the two lever cylinders 4 synchronously transform between the release state and the compression state; two reference positioning rods 9 are arranged and installed on the positioning base plate 1, and are used to indicate the spatial orientation of the intake and exhaust columns 18 on the rear cover 10 of the automobile air-conditioning compressor when the rear cover 10 of the automobile air-conditioning compressor is positioned on the positioning plate 3, thereby reducing the difficulty of accurately locating the positioning pin hole on the rear cover 10 of the automobile air-conditioning compressor and the positioning pin 5 on the positioning plate 3.

[0016] The pneumatic horizontal centering fixture for the rear cover of a variable displacement automobile air-conditioning compressor described in this embodiment adopts a split structure of a positioning base plate 1 and a cylinder base plate 2, which is beneficial for meeting the processing requirements of the rear cover 10 of automobile air-conditioning compressors of different models of the same model or different displacements of the same model by changing the installation positions of the positioning base plate 1 and the cylinder base plate 2 on the machining platform. Figure 1 and Figure 2The rear cover of the variable displacement automobile air conditioning compressor shown in the figure is processed, and the specific method is as follows:

[0017] Step 1. Select the positioning base plate 1 and the two cylinder base plates 2 used for processing, respectively fix the positioning plate 3 and the reference positioning rod 9 on the positioning base plate 1, and use the connecting plate 17 to fix the hand-pull valve 16 on the positioning base plate 1, and at the same time, respectively connect and install the two lever cylinders 4 on the cylinder base plates 2;

[0018] Step 2. Arrange the positioning base plate 1 and the cylinder base plate 2 assembled in step 1 accordingly, and respectively fix them on the processing platform of the vertical machining center;

[0019] Step 3. According to the structure of the automobile air-conditioning compressor rear cover 10, two positioning pins 5 corresponding to the positioning pin holes 14 on the cylinder body connection end surface of the automobile air-conditioning compressor rear cover 10 are installed on the positioning plate 3, and at the same time, the extension distance of the front end surface of the bolt rod 7 relative to the pressure rod 6 is adjusted, and the pressing height of the bolt rod 7 is set to meet the structural processing requirements of the automobile air-conditioning compressor rear cover 10, and the fixing nuts 8 are tightened respectively to fix the bolt rod 7 on the pressure rod 6;

[0020] Step 4. Operate the hand-pull valve 16 to adjust the two lever cylinders 4 synchronously to the position as follows: Figure 3 In the release state, take the automobile air-conditioning compressor rear cover 10 to be processed, align the cylinder connection end surface with the positioning plane on the positioning plate 3, and at the same time place the intake and exhaust column 18 protruding from the outer circumference on the automobile air-conditioning compressor rear cover 10 between the two reference positioning rods 9, and rotate the automobile air-conditioning compressor rear cover 10 slightly within the limit range of the two reference positioning rods 9 to make the positioning pin hole 14 and the positioning pin 5 respectively correspond and align, and the positioning pin 5 is correspondingly matched and embedded in the positioning pin hole 14, and then, the control position of the hand-pull valve 16 is changed, and the two lever cylinders 4 are synchronously adjusted to the following positions: Figure 4 In the above-mentioned pressing state, the two bolt rods 7 cooperate to press against the rear cover 10 of the automobile air-conditioning compressor, and the rear cover 10 of the automobile air-conditioning compressor is fastened and fixed on the processing station. After that, the vertical machining center can be started to process the automobile air-conditioning compressor in a timed manner. Figure 1 The high pressure valve hole 11, the assembly positioning hole 12 and the assembly positioning plane 13 shown are machined;

[0021] Step 5. After the processing is completed, the control position of the hand-pull valve 16 is changed again, and the two lever cylinders 4 are synchronously restored to the released state, and the processed automobile air-conditioning compressor rear cover 10 is taken out from the positioning plate 3, and then the operation of step 4 is turned to install and process the next automobile air-conditioning compressor rear cover 10 until the processing of all workpieces is completed.

Claims

1. A pneumatic horizontal centering fixture for the rear cover of a variable displacement automobile air-conditioning compressor, characterized in that: include: A base plate, a positioning plate (3), a lever cylinder (4) and a reference positioning rod (9); the base plate can be fixedly mounted on a machining platform, the positioning plate (3) and two lever cylinders (4) are arranged correspondingly to each other and are respectively fixedly mounted on the base plate; the upper end of the positioning plate (3) has a horizontally arranged structural positioning plane, on which at least two positioning pins (5) are detachably arranged and mounted, and the positioning pins (5) can form a corresponding fit with positioning pin holes (14) on a rear cover (10) of an automobile air-conditioning compressor; the lever cylinder (4) has a pressure rod in a lever structure (6), the two lever cylinders (4) are synchronously linked to achieve synchronous mutual conversion between the release state and the clamping state, and a pressure block is respectively installed on the working end of the pressure rod (6). In the clamping state, the pressure rod (6) is synchronously flipped back, and the two pressure blocks can cooperate to press against the back pressure bearing surface (15) of the rear cover (10) of the automobile air-conditioning compressor; the two reference positioning rods (9) are arranged on the bottom plate and are respectively arranged on both sides of the intake and exhaust columns (18) protruding from the outer circumference of the rear cover (10) of the automobile air-conditioning compressor positioned on the positioning plate (3).

2. A pneumatic horizontal centering fixture for the rear cover of a variable displacement automobile air-conditioning compressor as claimed in claim 1, characterized in that: The base plate adopts a split structure, comprising: a positioning base plate (1) and two cylinder base plates (2); the positioning plate (3) and the two lever cylinders (4) are respectively mounted on the positioning base plate (1) and the two cylinder base plates (2); the positioning base plate (1) and the cylinder base plates (2) can be arranged corresponding to each other and are respectively fixedly mounted on the machining platform.

3. A pneumatic horizontal centering fixture for the rear cover of a variable displacement automobile air-conditioning compressor as claimed in claim 2, characterized in that: Also includes: A hand-pull valve (16), the hand-pull valve (16) is a two-position linkage control valve, fixedly connected to the positioning base plate (1) or any one of the cylinder base plates (2), and can control the two pressure rods (6) to flip synchronously, so that the lever cylinder (4) can be synchronously transformed between the release state and the compression state.

4. A pneumatic horizontal centering fixture for a rear cover of a variable displacement automobile air-conditioning compressor as claimed in any one of claims 1 to 3, characterized in that: The pressing block is a bolt rod (7) with the end as the pressing surface, and the bolt rod (7) is threadedly mounted on the pressure rod (6) in a corresponding manner. By screwing the bolt rod (7) in and out relative to the pressure rod (6), the extension distance of the front end surface of the bolt rod (7) relative to the pressure rod (6) can be adjusted.

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