Automobile air conditioner compressor shell processing fixture

Abstract

The utility model relates to a kind of automobile air conditioner compressor shell processing fixture, belong to fixture field, when production line switches different model shell, need integral dismounting and replacing fixture positioning module, re-performing alignment, tool setting and precision debugging, there are problems, such as, type changing step is complicated, debugging period is long, production line downtime is long, and stop line cost is high, a kind of automobile air conditioner compressor shell processing fixture, including base, fixedly connected with hydraulic floating support in the upper of base, by multiple first holes and liftable support rod in the circular equidistance distribution of base, cooperate motor drive first limit board locking support rod, so that positioning column can automatically adapt the shell of different positioning hole layout, to reach directly adapt the automobile air conditioner compressor shell of different number of mounting hole, without replacing positioning column, save time, improve production efficiency effect.

Description

Technical Field

[0001] This invention relates to the field of fixtures, and in particular to a fixture for machining automotive air conditioning compressor housings. Background Technology

[0002] In the field of automotive air conditioning compressor housing processing, due to the rapid iteration of vehicle models and frequent configuration upgrades, the same production line usually needs to complete the processing switch of different models of compressor housing within a few days in order to adapt to the multi-category, small-batch, and flexible production mode.

[0003] Currently, the industry commonly uses positioning pin-type special fixtures to clamp and position compressor housings. The core function of the positioning pin is to cooperate with the positioning holes on the bottom of the housing to ensure that the compressor housing maintains a vertical posture and the axis is centered, thus ensuring machining coaxiality. However, the number of mounting feet on the bottom of different compressor housing models requires the creation of dedicated positioning holes and matching dedicated positioning modules for each housing type.

[0004] When the production line switches to different models of housings, the entire fixture positioning module needs to be disassembled and replaced, and alignment, tool setting and precision debugging need to be carried out again. This results in problems such as complicated model changeover procedures, long debugging cycles, long production line downtime and high downtime costs. Summary of the Invention

[0005] The purpose of this invention is to provide a machining fixture for automotive air conditioning compressor housings, which solves the problems of cumbersome model changeover procedures, long debugging cycles, long production line downtime, and high downtime costs when switching between different housing models on the production line. These problems include the need to completely disassemble and replace the fixture positioning module, and to re-align, set tools, and adjust precision.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a machining fixture for an automotive air conditioning compressor housing, comprising a base, a hydraulic floating support fixedly connected above the base, a clamping cylinder disposed on one side of the hydraulic floating support and fixedly connected to the base, and a slot positioning disposed inside the hydraulic floating support. A rotating mechanism is disposed inside the base, a positioning column is disposed above the rotating mechanism, a pushing mechanism is disposed on one side of the clamping cylinder, and a first external positioning plate is disposed inside the pushing mechanism. The rotating mechanism is used to drive the positioning column to rise and fall to adapt to the positioning hole layout of different housing models, and the pushing mechanism is used to drive the first outer shape positioning plate to adaptively fit the housing shape and clean the contact surface.

[0007] The rotating mechanism includes a rotating component and an elastic component disposed above the rotating component; The rotating assembly includes a motor fixedly connected to the inner side of the base, a rotating disk fixedly connected to the output end of the motor, an arc-shaped first guide groove opened on the upper surface of the rotating disk, a second guide groove opened on the inner wall of the base, a first guide rod disposed in the first guide groove and nested in the second guide groove, and an arc-shaped first limiting plate fixedly connected to the outer side of the first guide rod. The motor drives the rotating disk to rotate, and drives the first guide rod to slide along the second guide groove through the first guide groove, so that the first limiting plate moves inward or outward.

[0008] The elastic component includes a first support plate fixedly connected to the lower part of the inner wall of the base, a plurality of first holes opened inside the base, a support rod disposed in the first holes, a first elastic rubber pad fixedly connected to the lower end of the support rod and connected to the first support plate, and a plurality of limiting grooves opened inside the support rod. The upper end of the support rod is fixedly connected to the positioning post, and the width of the limiting groove is the same as the thickness of the first limiting plate. The first elastic rubber pad is used to push the unpressurized positioning column upwards, and the first limiting plate is used to insert into the limiting groove to lock the height of the support rod, so that the positioning column pressed down by the housing remains in a supported state.

[0009] The first hole is distributed in a circular pattern with multiple holes at equal intervals inside the base. The outer side of the support rod fits against the inner side of the first hole, and the cross-section of the support rod is rectangular to prevent the support rod from rotating and to ensure that the positioning column is in the same direction.

[0010] The actuation mechanism includes a limit component and a swing component disposed above the limit component; The limiting assembly includes a first positioning plate fixedly connected to one side of the clamping cylinder, a first groove opened inside the first positioning plate, a third hole set on one side of the first groove, a second positioning plate set inside the third hole, multiple positioning grooves opened inside the second positioning plate, a second elastic rubber pad fixedly connected to one end of the second positioning plate, a second hole opened above the first groove, a push rod set inside the second hole, a second limiting plate fixedly connected to the lower end of the push rod, a push plate slidably connected to the upper surface of the first positioning plate, an inclined linear third guide groove opened inside the push plate, a second guide rod set inside the third guide groove and fixedly connected to the push rod, and a second elastic telescopic rod connected between the push plate and the first positioning plate. The second positioning plate is used to clean the contact surface of the housing under the drive of the swing assembly. After the push plate contacts the housing, it drives the second guide rod to press down through the third guide groove, so that the second limiting plate enters the positioning groove and pushes the second positioning plate towards the housing to achieve stable clamping.

[0011] The end face of the second limiting plate near the positioning post is inclined, which is used to push the second positioning plate towards the shell during descent.

[0012] The third guide groove and the second guide rod are in clearance fit to ensure that the second guide rod slides smoothly when the push plate moves.

[0013] The second positioning plate, near the positioning post, is made of reinforced nylon material to prevent scratching the housing surface when cleaning the contact surface.

[0014] The swing assembly includes a spherical universal joint fixedly connected to the side of the first positioning plate away from the positioning post, an electric push rod fixedly connected to the end of the spherical universal joint away from the positioning post, a second support plate fixedly connected to the upper end of the electric push rod, a second groove opened on the inner side of the second support plate, a fourth guide groove provided on the inner wall of the second groove, a pull rod provided in the second groove and slidably hinged to the first positioning plate, and a fourth guide rod fixedly connected to the pull rod and nested in the fourth guide groove. The end of the fourth guide groove away from the positioning post is wavy, and the end closer to the positioning post is rectangular with a width greater than that of the fourth guide rod. The electric push rod is used to drive the first positioning plate to move back and forth, and through the wave-shaped section of the fourth guide groove, the first positioning plate swings, driving the second positioning plate to reciprocate to clean the area of ​​the housing to be clamped.

[0015] A linear telescopic rod is fixedly connected to the lower surface of the pull rod and is also fixedly connected to the electric push rod. This rod is used to assist the pull rod in moving synchronously with the electric push rod and to maintain the guiding stability of the fourth guide rod in the fourth guide groove.

[0016] 1. Compared with the prior art, the beneficial effects of the present invention are: by distributing multiple first holes and liftable support rods equidistantly in the inner circle of the base, and cooperating with the motor-driven first limiting plate to lock the support rods, the positioning post can automatically adapt to the housing with different positioning hole layouts, thereby achieving the effect of directly adapting to the housing of automotive air conditioning compressor with different numbers of mounting holes, eliminating the need to replace the positioning post, saving time, and improving production efficiency.

[0017] 2. This invention uses multiple positioning pins that can automatically extend into the corresponding positioning holes, eliminating the need for workers to manually align complex workpieces and fixtures, thereby reducing alignment hassles and improving installation efficiency.

[0018] 3. This invention uses an electric push rod to drive a spherical universal joint, a first positioning plate, and a second positioning plate. The wave-shaped guide groove causes the second positioning plate to swing and clean the area to be clamped, adapting to the complex structure of the shell. This achieves the effects of accurately cleaning the alumina at the contact position, reducing corrosion of areas without alumina, reducing cleaning workload, and improving clamping effect.

[0019] 4. In this invention, after the push plate contacts the housing, it drives the second limiting plate into the positioning groove through the inclined linear third guide groove, pushing the second positioning plate to move towards the housing. Each second positioning plate is fixed only after it is in contact with the housing, thereby increasing the contact surface between the second positioning plate and the housing and making the clamping and fixing more stable.

[0020] 5. The present invention connects the first positioning plate and the electric push rod through a spherical universal joint. When the contact surface of the housing is inclined, it can adaptively fit, thereby improving the contact surface between the second positioning plate and the housing and achieving a better clamping and fixing effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the front cross-sectional structure of the base of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A in the middle; Figure 4 This is a top view of the first hole structure of the present invention; Figure 5 This is a schematic diagram of the external structure of the pushing mechanism of the present invention; Figure 6 This is a schematic diagram of the left-side cross-sectional structure of the pushing mechanism of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point B; Figure 8 This is a schematic diagram of the left-side cross-sectional structure of the second support plate of the present invention.

[0022] In the diagram: 1. Base; 2. Hydraulic floating support; 3. Clamping cylinder; 4. Groove positioning; 5. Rotating mechanism; 6. Positioning column; 7. Pushing mechanism; 8. First outer shape positioning plate; 51. Rotating assembly; 52. Elastic assembly; 71. Limiting assembly; 72. Swinging assembly; 511. Motor; 512. Rotating disk; 513. First guide groove; 514. Second guide groove; 515. First guide rod; 516. First limiting plate; 521. First support plate; 522. First hole; 523. Support rod; 524. First elastic rubber pad; 525. Limiting groove; 711. 712. First positioning plate; 713. First groove; 714. First hole; 715. Second positioning plate; 716. Positioning groove; 717. Second elastic rubber pad; 718. Second hole; 719. Second limiting plate; 710. Push plate; 7111. Third guide groove; 7111. Second guide rod; 7112. Second elastic telescopic rod; 7113. Push rod; 721. Spherical universal joint; 722. Electric push rod; 723. Second support plate; 724. Second groove; 725. Fourth guide groove; 726. Pull rod; 727. Fourth guide rod; 728. Linear telescopic rod. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] This fixture is used for machining processes of automotive air conditioning compressor housings (such as end milling, thread hole machining, bearing hole boring, etc.). By using the positioning pins to engage with the mounting holes at the bottom of the housing, and the first external positioning plate to assist in clamping the housing shape, it ensures that the housing maintains a vertical posture and positional accuracy during the machining process.

[0025] Please see Figures 1-8 The present invention provides a technical solution: The present invention is a machining fixture for an automotive air conditioning compressor housing, comprising a base 1, a hydraulic floating support 2 fixedly connected above the base 1, a clamping cylinder 3 fixedly connected to the base 1 on one side of the hydraulic floating support 2, and a groove positioning 4 disposed inside the hydraulic floating support 2. A rotating mechanism 5 is disposed inside the base 1, a positioning column 6 is disposed above the rotating mechanism 5, a pushing mechanism 7 is disposed on one side of the clamping cylinder 3, and a first external positioning plate 8 is disposed inside the pushing mechanism 7.

[0026] Step 1: Housing placement and adaptive lifting of positioning columns When it is necessary to clamp the housing of the car air conditioning compressor, first place the housing on top of the positioning post 6.

[0027] The rotating mechanism 5 includes a rotating component 51 and an elastic component 52, with the elastic component 52 positioned above the rotating component 51. The rotating component 51 includes a motor 511 fixedly connected to the inner side of the base 1. A rotating disk 512 is fixedly connected to the output end of the motor 511. A first guide groove 513 is formed on the upper surface of the rotating disk 512, and the first guide groove 513 has an arc-shaped appearance. A second guide groove 514 is formed on the inner wall of the base 1. A first guide rod 515 is nested inside the second guide groove 514, and a first limiting plate 516 is fixedly connected to the outer side of the first guide rod 515. The first limiting plate 516 also has an arc-shaped appearance. The second guide groove 514 has a straight shape, and the first guide rod 515 located inside the second guide groove 514 has a cuboid shape. The first guide rod 515 is slidably connected to the base 1.

[0028] The elastic component 52 includes a first support plate 521 fixedly connected to the lower inner wall of the base 1. The base 1 has a first hole 522 inside, and a support rod 523 is provided inside the first hole 522. The support rod 523 is fixedly connected to the positioning post 6. A first elastic rubber pad 524, which is fixedly connected to the first support plate 521, is fixedly connected to the lower end of the support rod 523. Multiple limiting grooves 525 are equidistantly arranged inside the support rod 523, and the width of the limiting grooves 525 is the same as the thickness of the first limiting plate 516. Multiple first holes 522 are equidistantly distributed in a circular pattern inside the base 1, and the inner surface of the first holes 522 fits against the outer surface of the support rod 523. The support rod 523 has a cuboid shape.

[0029] Step 2: Lock the depressed positioning pin Because the positioning holes on the housing of each automotive air conditioning compressor are located differently, this device employs multiple circular, equidistantly distributed first holes 522 and a liftable support rod 523. This allows the positioning pin 6 to extend into the corresponding positioning hole when the housing is placed on the positioning pin 6, while positioning pins 6 that cannot enter are pushed downwards. The first elastic rubber pad 524 is used to push the unpressed positioning pins 6 upwards. After the housing is fully placed, the starter motor 511 drives the rotating disk 512 and the first guide groove 513 to rotate. The first guide rod 515 is located in both the arc-shaped first guide groove 513 and the straight second guide groove 514. Through reasonable geometric design (for example, the arc radius of the first guide groove 513 and the straight direction of the second guide groove 514 satisfy a certain functional relationship, combined with appropriate fitting clearance and material elasticity, the first guide rod 515 moves radially along the straight groove under the push of the arc groove), the first guide rod 515 is pushed by the first guide groove 513 and moves towards the middle along the second guide groove 514, thereby driving the first limiting plate 516 to move towards the support rod 523, so that the first limiting plate 516 enters the inner side of the limiting groove 525, and provides positioning support for the support rod 523 and the positioning post 6. The first limiting plate 516 is used to lock the height of the support rod 523 by inserting it into the limiting groove 525, so that the positioning post 6 pressed down by the housing remains in a supported state. The positioning hole depth of different housing models has a regular design (usually a standardized size). This fixture sets the spacing of the limiting grooves on the support rod to the greatest common divisor of various possible pressing depths, so that no matter how much the housing is pressed down, there will always be a limiting groove that is exactly at the insertion height of the first limiting plate. The positioning posts not pressed down by the housing remain at the highest position, and their limiting grooves are located above the first limiting plate, so they are not locked; however, since subsequent processing (end face milling, thread hole processing, bearing hole boring, etc.) does not involve the bottom surface of the housing, these protruding positioning posts will not interfere with the cutting tool. The first limiting plate simultaneously contacts all the pressed-down support rods and inserts into their limiting grooves to achieve reliable locking. Through the above process, the positioning post 6 can automatically adapt to housings with different positioning hole layouts, keep the housing in a vertical position, process coaxiality, directly adapt to automotive air conditioning compressor housings with different numbers of mounting holes, without the need to replace the positioning posts, saving time and improving production efficiency.

[0030] Because multiple positioning pins 6 can automatically extend into the corresponding positioning holes, there is no need for workers to manually align complex workpieces and fixtures, thereby reducing alignment troubles and improving installation efficiency.

[0031] The pushing mechanism 7 includes a limiting component 71 and a swing component 72, with the swing component 72 positioned above the limiting component 71. The limiting component 71 includes a first positioning plate 711 fixedly connected to one side of the clamping cylinder 3. The first positioning plate 711 has a first groove 712 inside, a third hole 713 on one side of the first groove 712, a second positioning plate 714 inside the third hole 713, and multiple positioning grooves 715 inside the second positioning plate 714. A second elastic rubber pad 716 is fixedly connected to one end of the second positioning plate 714, and the second hole 717 communicates with the top of the first groove 712. A push rod 7113 is provided inside the second hole 717. A second limiting plate 718 is fixedly connected to the lower end of the push rod 7113. A push plate 719 is slidably connected to the upper surface of the first positioning plate 711. A third guide groove 7110 is provided inside the push plate 719. A second guide rod 7111, fixedly connected to the push rod 7113, is provided inside the third guide groove 7110. A second elastic telescopic rod 7112, fixedly connected to the first positioning plate 711, is fixedly connected to one end of the push plate 719. The end face of the second limiting plate 718 near the positioning post 6 is inclined. The third guide groove 7110 has an inclined straight-line shape, and the third guide groove 7110 and the second guide rod 7111 are fitted with a clearance fit. The material of the second positioning plate 714 near the positioning post 6 is reinforced nylon.

[0032] The swing assembly 72 includes a spherical universal joint 721 fixedly connected to the side of the first positioning plate 711 away from the positioning post 6. An electric push rod 722 is fixedly connected to the end of the spherical universal joint 721 away from the positioning post 6. A second support plate 723 is fixedly connected to the upper end of the electric push rod 722. A second groove 724 is provided on the inner side of the second support plate 723. A fourth guide groove 725 is provided on the inner side of the second groove 724. A pull rod 726 is provided on the inner side of the second groove 724 and is slidably hinged to the first positioning plate 711. A fourth guide rod 727 is provided on the inner side of the fourth guide groove 725 and is fixedly connected to the pull rod 726. The fourth guide groove 725 has a wavy appearance at the end away from the positioning post 6 and a rectangular appearance at the end near the positioning post 6. The width of the fourth guide groove 725 at the end near the positioning post 6 is greater than that of the fourth guide rod 727. A linear telescopic rod 728 fixedly connected to the electric push rod 722 is fixedly connected to the lower surface of the pull rod 726. The linear telescopic rod 728 is used to assist the pull rod 726 in moving synchronously with the electric push rod 722 and to maintain the guiding stability of the fourth guide rod 727 in the fourth guide groove 725.

[0033] Step 3: Initial clamping After the positioning pin 6 positions the housing, the hydraulic floating support 2 and the clamping cylinder 3 are activated for initial clamping. Since automotive air conditioning compressor housings are mostly made of aluminum, their surfaces have a significant amount of aluminum oxide. If not cleaned before clamping, the clamping may loosen. Therefore, the area to be clamped needs to be cleaned.

[0034] Step 4: Swing to clean the contact surface The electric push rod 722 is activated, driving the spherical universal joint 721, the first positioning plate 711, and the second positioning plate 714 towards the housing. The electric push rod 722 drives the pull rod 726, causing the fourth guide rod 727 to slide along the fourth guide groove 725. Because the end of the fourth guide groove 725 away from the positioning post 6 is wavy, and the end near the positioning post 6 is rectangular with a width greater than the fourth guide rod 727, the first positioning plate 711 and the second positioning plate 714 oscillate during forward movement. Specifically: the wavy section causes the fourth guide rod 727 to oscillate up and down during forward movement, causing the first positioning plate 711 and the second positioning plate 714 to oscillate back and forth around the spherical universal joint 721, thereby cleaning the area of ​​the housing to be clamped; the rectangular section allows the fourth guide rod 727 to slide freely without oscillation, providing stability for subsequent clamping. The second positioning plate 714 cleans the area to be clamped during oscillation, and its reinforced nylon material prevents scratches on the housing surface. The second elastic rubber pad 716 allows the second positioning plate 714, which partially contacts the housing, to be compressible, while the other part continues to advance and clean, thereby adapting to the complex structure of the housing.

[0035] Traditionally, workers place the housings haphazardly, and since each type of housing has a different shape and a complex surface, it's impossible to accurately predict the clamping position. They can only estimate the approximate location over a wide area and pre-clean the alumina. This not only increases workload but also, since the automotive air conditioning compressor housing is often cut after clamping, the cutting process generates high heat requiring liquid cooling. The coolant is particularly corrosive to areas without alumina protection. In this solution, the second positioning plate 714 cleans precisely the area to be clamped, allowing for accurate cleaning of the alumina at the contact point, reducing damage to the alumina, and thus reducing coolant corrosion of areas without alumina. Furthermore, the smaller cleaning area also reduces workload.

[0036] Step 5: Trigger locking and final clamping After cleaning, the electric push rod 722 continues to move forward. The front end face of the push plate 719 is designed to be closer to the housing than the second positioning plate 714, so the push plate 719 contacts the housing first. After the push plate 719 contacts the housing, it is pushed, causing the inclined linear third guide groove 7110 to move, driving the second guide rod 7111 and the push rod 7113 to move downward, so that the second limiting plate 718 enters the positioning groove 715. At this time, the second positioning plate 714 is not yet in close contact with the housing; the inclined surface of the second limiting plate 718 continues to move downward, pushing the second positioning plate 714 towards the housing until the reinforced nylon surface of the second positioning plate 714 is in contact with the housing surface. The inclined surface of the second limiting plate 718 pushes the second positioning plate 714 towards the housing, so that each second positioning plate 714 is fixed only after it is in contact with the housing, increasing the contact area between the second positioning plate 714 and the housing, making the clamping more stable.

[0037] Since the first positioning plate 711 and the electric push rod 722 are connected by a spherical universal joint 721, when the housing contact surface is an inclined surface, the first positioning plate 711 and the second positioning plate 714 can adaptively fit together, further improving the clamping and fixing effect.

[0038] Technical specifications regarding cleaning effectiveness: The surface of automotive air conditioning compressor housings typically contains oil, debris, and a natural oxide layer. This fixture primarily targets oil and attached debris, while the reciprocating oscillating friction partially removes the looser oxide layer. Dense alumina films do not require cleaning; the purpose of cleaning is to reduce the inability of loose materials to provide stable force transmission after clamping. This is the main reason why cleaning is performed during clamping. Pre-cleaning does not guarantee that new impurities will not appear on the cleaned surface afterward, and in large-scale production, pre-cleaning would inevitably lead to a period of rest after cleaning, potentially causing the loose oxide layer to re-form. The reinforced nylon material has a certain degree of hardness and wear resistance, and combined with the oscillating motion, it will not damage the housing substrate. Precise cleaning of the clamping area avoids the corrosive effects of coolant on areas without an oxide film after traditional large-area cleaning (coolant contains corrosive impurities, most notably chloride ions, which severely corrode aluminum alloys). This is something pre-cleaning cannot achieve, as it cannot precisely determine which areas need cleaning.

[0039] Although the swing cleaning mechanism of this fixture has a relatively complex structure, it achieves automated linkage between cleaning and clamping without manual intervention. It is especially suitable for scenarios where the housing needs to be changed frequently in multi-variety, small-batch production, which greatly shortens the auxiliary time.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machining fixture for an automotive air conditioning compressor housing, comprising a base (1), a hydraulic floating support (2) fixedly connected above the base (1), a clamping cylinder (3) disposed on one side of the hydraulic floating support (2) and fixedly connected to the base (1), and a groove positioning (4) disposed inside the hydraulic floating support (2), characterized in that, A rotating mechanism (5) is provided on the inner side of the base (1), a positioning column (6) is provided above the rotating mechanism (5), a pushing mechanism (7) is provided on one side of the pressing cylinder (3), and a first outer shape positioning plate (8) is provided on the inner side of the pushing mechanism (7). The rotating mechanism (5) is used to drive the positioning column (6) to rise and fall to adapt to the positioning hole layout of different housing models, and the pushing mechanism (7) is used to drive the first outer shape positioning plate (8) to adaptively fit the outer shape of the housing and clean the contact surface.

2. The automotive air conditioning compressor housing machining fixture according to claim 1, characterized in that, The rotating mechanism (5) includes a rotating component (51) and an elastic component (52) disposed above the rotating component (51). The rotating assembly (51) includes a motor (511) fixedly connected to the inner side of the base (1), a rotating disk (512) fixedly connected to the output end of the motor (511), an arc-shaped first guide groove (513) opened on the upper surface of the rotating disk (512), a second guide groove (514) opened on the inner wall of the base (1), a first guide rod (515) disposed in the first guide groove (513) and nested in the second guide groove (514), and an arc-shaped first limiting plate (516) fixedly connected to the outer side of the first guide rod (515). The motor (511) is used to drive the rotating disk (512) to rotate, and through the first guide groove (513) it drives the first guide rod (515) to slide along the second guide groove (514), so that the first limiting plate (516) moves inward or outward.

3. A machining fixture for an automotive air conditioning compressor housing according to claim 2, characterized in that, The elastic component (52) includes a first support plate (521) fixedly connected to the lower side wall of the base (1), a plurality of first holes (522) opened inside the base (1), a support rod (523) disposed in the first hole (522), a first elastic rubber pad (524) fixedly connected to the lower end of the support rod (523) and connected to the first support plate (521), and a plurality of limiting grooves (525) opened inside the support rod (523). The upper end of the support rod (523) is fixedly connected to the positioning post (6), and the width of the limiting groove (525) is consistent with the thickness of the first limiting plate (516). The first elastic rubber pad (524) is used to push the unpressed positioning post (6) upward, and the first limiting plate (516) is used to insert into the limiting groove (525) to lock the height of the support rod (523), so that the positioning post (6) pressed down by the housing remains in a supported state.

4. A machining fixture for an automotive air conditioning compressor housing according to claim 3, characterized in that, The first hole (522) is distributed in a circular and equidistant manner in the base (1). The outer side of the support rod (523) is in contact with the inner side of the first hole (522), and the cross-section of the support rod (523) is rectangular to prevent the support rod (523) from rotating and to ensure that the positioning column (6) is in the same direction.

5. A machining fixture for an automotive air conditioning compressor housing according to claim 1, characterized in that, The pushing mechanism (7) includes a limiting component (71) and a swing component (72) disposed above the limiting component (71). The limiting component (71) includes a first positioning plate (711) fixedly connected to one side of the clamping cylinder (3), a first groove (712) opened inside the first positioning plate (711), a third hole (713) provided on one side of the first groove (712), a second positioning plate (714) provided in the third hole (713), a plurality of positioning grooves (715) opened inside the second positioning plate (714), a second elastic rubber pad (716) fixedly connected to one end of the second positioning plate (714), and a second hole opened above the first groove (712). 717), a push rod (7113) disposed in the second hole (717), a second limiting plate (718) fixedly connected to the lower end of the push rod (7113), a push plate (719) slidably connected to the upper surface of the first positioning plate (711), an inclined linear third guide groove (7110) opened inside the push plate (719), a second guide rod (7111) disposed in the third guide groove (7110) and fixedly connected to the push rod (7113), and a second elastic telescopic rod (7112) connected between the push plate (719) and the first positioning plate (711). The second positioning plate (714) is used to clean the contact surface of the housing under the drive of the swing assembly (72). After the push plate (719) contacts the housing, it drives the second guide rod (7111) to press down through the third guide groove (7110), so that the second limiting plate (718) enters the positioning groove (715) and pushes the second positioning plate (714) towards the housing to achieve stable clamping.

6. A machining fixture for an automotive air conditioning compressor housing according to claim 5, characterized in that, The end face of the second limiting plate (718) near the positioning post (6) is inclined, which is used to push the second positioning plate (714) towards the housing when descending.

7. A machining fixture for an automotive air conditioning compressor housing according to claim 5, characterized in that, The third guide groove (7110) and the second guide rod (7111) are in clearance fit to ensure that the second guide rod (7111) slides smoothly when the push plate (719) moves.

8. A machining fixture for an automotive air conditioning compressor housing according to claim 5, characterized in that, The material of the second positioning plate (714) near the positioning post (6) is reinforced nylon material, which is used to avoid scratching the surface of the housing when cleaning the contact surface.

9. A machining fixture for an automotive air conditioning compressor housing according to claim 5, characterized in that, The swing assembly (72) includes a spherical universal joint (721) fixedly connected to the side of the first positioning plate (711) away from the positioning post (6), an electric push rod (722) fixedly connected to the end of the spherical universal joint (721) away from the positioning post (6), a second support plate (723) fixedly connected to the upper end of the electric push rod (722), a second groove (724) opened on the inner side of the second support plate (723), a fourth guide groove (725) provided on the inner wall of the second groove (724), a pull rod (726) provided in the second groove (724) and slidably hinged to the first positioning plate (711), and a fourth guide rod (727) fixedly connected to the pull rod (726) and nested in the fourth guide groove (725). The fourth guide groove (725) is wavy at the end away from the positioning post (6) and rectangular at the end near the positioning post (6) with a width greater than that of the fourth guide rod (727). The electric push rod (722) is used to drive the first positioning plate (711) to move back and forth, and the first positioning plate (711) swings through the wave-shaped section of the fourth guide groove (725), which drives the second positioning plate (714) to clean the area of ​​the housing to be clamped.

10. A machining fixture for an automotive air conditioning compressor housing according to claim 9, characterized in that, The lower surface of the pull rod (726) is fixedly connected to a linear telescopic rod (728) which is fixedly connected to the electric push rod (722). This is used to assist the pull rod (726) in moving synchronously with the electric push rod (722) and to maintain the guiding stability of the fourth guide rod (727) in the fourth guide groove (725).

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