Clamp for machining electronic expansion valve of automobile air conditioner

Abstract

The utility model discloses a clamp for machining an electronic expansion valve of an automobile air conditioner, and particularly relates to the field of machining of the electronic expansion valve of the automobile air conditioner, which comprises a machining base, two ends of the top of the machining base are respectively connected with a rotary support frame and a fixed support frame, and a cooling water tank is arranged between the rotary support frame and the fixed support frame. A water inlet and outlet hole is formed in one side of the cooling water pond, a cooling water pump is arranged in the cooling water pond, a rotating motor is connected to the rotating supporting frame, a driving rotating shaft is arranged on the rotating motor, an inner supporting clamp is connected to the end, away from the rotating motor, of the driving rotating shaft, and a clamping air cylinder is connected to the fixed supporting frame. A telescopic rod is arranged in the clamping cylinder; in the welding process of the pipeline of the electronic expansion valve of the automobile air conditioner, the valve body of the electronic expansion valve of the air conditioner can be protected, and the valve body of the electronic expansion valve can be cooled in the protection process.

Description

Technical Field

[0001] The utility model relates to the field of processing automotive air-conditioning electronic expansion valves. More specifically, the utility model relates to a fixture for processing automotive air-conditioning electronic expansion valves. Background Art

[0002] An expansion valve is an important component in a refrigeration system, generally installed between a liquid storage cylinder and an evaporator. The expansion valve throttles medium-temperature and high-pressure liquid refrigerant into low-temperature and low-pressure wet steam, and then the refrigerant absorbs heat in the evaporator to achieve a refrigeration effect.

[0003] After retrieval, the existing patent (application number CN200910095667.3) discloses a GTAW device for a thermostatic expansion valve power head. It includes a base, a centering and clamping mechanism, a workpiece pressing mechanism, a welding torch feeding mechanism, a transmission mechanism, and a cooling system; the centering and clamping mechanism is installed on the base plate through a pneumatic claw seat; the rotating part of the workpiece pressing mechanism is installed on the left side plate through a bearing seat; the moving part of the workpiece pressing mechanism is installed on the right side plate through a cylinder; the rotating part and the moving part of the workpiece pressing mechanism together constitute the workpiece pressing mechanism; the welding torch feeding mechanism is fixed on the upper connecting rod; the transmission mechanism is installed on the base plate through a stepping motor seat; the cooling system adopts an internal cooling method. Automatic control components are installed in each mechanism, and an embedded controller is installed in the device to realize the automatic control of GTAW for the thermostatic expansion valve power head. Compared with the traditional welding method, it has the characteristics of convenient workpiece clamping, high automation, good welding quality, high welding efficiency, and good stability. The inventor found the following problems in the process of realizing the present utility model:

[0004] The fixture of the existing expansion valve welding device does not have a structure for protecting the valve body and cannot cool the pipeline during the welding process. During the welding of the pipeline by the expansion valve, the welding flame may accidentally contact the expansion valve. When the temperature of the expansion valve body exceeds 120 °C, it may damage the valve body of the expansion valve, and the pipeline being welded may also conduct heat to the valve body during the welding process;

[0005] Therefore, a fixture for processing automotive air-conditioning electronic expansion valves is proposed to solve the above problems. Content of the Utility Model

[0006] In order to overcome the above-mentioned defects of the prior art, the present utility model provides a fixture for processing automotive air-conditioning electronic expansion valves to solve the problems raised in the above background art.

[0007] To achieve the above object, the present utility model provides the following technical solution: A fixture for machining an automotive air-conditioning electronic expansion valve, comprising a machining base, wherein two ends of the top of the machining base are respectively connected with a rotary support frame and a fixed support frame, and a cooling water pool is arranged between the rotary support frame and the fixed support frame. A water inlet and drainage hole is arranged on one side of the cooling water pool, and a cooling water pump is arranged in the cooling water pool;

[0008] A rotary motor is connected to the rotary support frame, a driving rotating shaft is arranged on the rotary motor, an inner support fixture is connected to the end of the driving rotating shaft away from the rotary motor, a clamping cylinder is connected to the fixed support frame, a telescopic rod is arranged in the clamping cylinder, and an installation connection block is connected to the end of the telescopic rod close to the inner support fixture.

[0009] Preferably, two groups of inner support clamping blocks are arranged on one side of the inner support fixture close to the fixed support frame, and a clamping motor is arranged on the side of the inner support fixture away from the inner support clamping blocks.

[0010] Preferably, a driving gear is connected to the clamping motor, clamping gear plates are connected to both of the two groups of inner support clamping blocks, the two groups of clamping gear plates are centrosymmetric to each other, and both of the two groups of clamping gear plates are meshed with the driving gear.

[0011] Preferably, a valve body cooling block is connected to the side of the installation connection block away from the telescopic rod, the center point of the valve body cooling block and the midpoint between the two groups of inner support clamping blocks are on the same straight line, and a water spraying connection block is connected below the installation connection block.

[0012] Preferably, a cooling spray head is connected to the side of the water spraying connection block close to the valve body cooling block, a connecting spring tube is connected to the bottom of the water spraying connection block, and one end of the connecting spring tube is connected into the cooling water pump.

[0013] Preferably, a connecting rotating shaft is connected between the valve body cooling block and the installation connection block, a connecting bearing is arranged at the connection part of the connecting rotating shaft and the installation connection block, and a water absorbing sponge is connected to the inner wall of the valve body cooling block.

[0014] Preferably, a pipe body connection groove and a water inlet and water passing plate are respectively arranged on two sides of the valve body cooling block, and an extrusion clamping head is arranged at the central position in the valve body cooling block.

[0015] The technical effects and advantages of the present utility model:

[0016] 1. Compared with the prior art, this fixture for processing automotive air-conditioning electronic expansion valves can protect the valve body of the automotive air-conditioning electronic expansion valve during the welding process of the pipeline of the automotive air-conditioning electronic expansion valve, and cool down the valve body of the electronic expansion valve during the protection process. During the welding and cooling process, the valve body cooling block is used to wrap the valve body of the automotive air-conditioning electronic expansion valve to prevent the valve body of the automotive air-conditioning electronic expansion valve from being damaged by the flame during the welding of the pipeline. The cooling water pump pumps the water in the cooling water pool to the water spraying connection block and the cooling spray head through the connecting spring pipe, and the cooling spray head sprays cooling water to the valve body cooling block. During the cooling process, the cooling spray head sprays water to cool the water inlet and water passing plate. The cooling water is absorbed by the water absorption sponge, and the water absorption sponge wraps the valve body of the electronic expansion valve to cool it down, so that the cooling water pump in the valve body cooling block cools down, avoiding damage to the valve body of the electronic expansion valve due to excessive temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the whole of the present utility model.

[0018] Figure 2 It is a schematic top view structural diagram of the cooling water pool of the present utility model.

[0019] Figure 3 It is a schematic structural diagram of the inner support fixture of the present utility model.

[0020] Figure 4 It is a schematic structural diagram of the cooling water pool of the present utility model.

[0021] Figure 5 It is a schematic side sectional structural diagram of the valve body cooling block of the present utility model.

[0022] Figure 6 It is a schematic structural diagram of the valve body cooling block of the present utility model.

[0023] Reference numerals are: 1, processing base; 2, rotating support frame; 3, fixed support frame; 4, cooling water pool; 5, rotating motor; 6, clamping cylinder; 7, inner support fixture; 8, valve body cooling block; 9, water spraying connection block; 41, water inlet and drain hole; 42, cooling water pump; 51, driving rotating shaft; 61, telescopic rod; 62, mounting connection block; 621, connecting bearing; 71, inner support clamping block; 711, clamping gear plate; 72, clamping motor; 721, driving gear; 81, connecting rotating shaft; 82, extrusion clamping head; 83, water absorption sponge; 84, pipe body connection groove; 85, water inlet and water passing plate; 91, connecting spring pipe; 92, cooling spray head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1

[0026] As shown in the attached Figures 1 to 2 A fixture for processing an automotive air-conditioning electronic expansion valve, including a processing base 1. At both ends of the top of the processing base 1, a rotating support frame 2 and a fixed support frame 3 are respectively connected. A cooling water pool 4 is arranged between the rotating support frame 2 and the fixed support frame 3. A water inlet and drain hole 41 is arranged on one side of the cooling water pool 4, and a cooling water pump 42 is arranged in the cooling water pool 4;

[0027] A rotating motor 5 is connected to the rotating support frame 2. A driving rotating shaft 51 is arranged on the rotating motor 5. One end of the driving rotating shaft 51 away from the rotating motor 5 is connected to an inner support fixture 7. A clamping cylinder 6 is connected to the fixed support frame 3. A telescopic rod 61 is arranged in the clamping cylinder 6, and one end of the telescopic rod 61 close to the inner support fixture 7 is connected to an installation connection block 62.

[0028] Among them: The pipeline welding work of the electronic expansion valve is completed on the processing base 1. One end of the pipeline of the air-conditioning electronic expansion valve is fixed by the inner support fixture 7 on the rotating bracket 2, and the clamping cylinder 6 on the fixed support frame 3 drives the telescopic rod 61 and the installation connection block 62 connected thereto to move towards the inner support fixture 7, so as to complete the clamping work of the electronic expansion valve. After the air-conditioning electronic expansion valve is fixedly clamped, the rotating motor 5 drives the driving rotating shaft 51 to rotate, and the driving rotating shaft 51 drives the electronic expansion valve to rotate for welding work during the rotation process. The cooling water pool 4 can perform water inlet and drainage work through the water inlet and drain hole 41.

[0029] Embodiment 2

[0030] On the basis of Embodiment 1, the solution in Embodiment 1 will be further refined and introduced in combination with the following specific working methods, as Figures 1 to 6 shown, for details, see the following description:

[0031] As a preferred implementation manner, two groups of inner support blocks 71 are arranged on one side of the inner support fixture 7 close to the fixed support frame 3, and a clamping motor 72 is arranged on the side of the inner support fixture 7 away from the inner support blocks 71; further, the inner support fixture 7 drives the two groups of inner support blocks 71 to perform inner support clamping work by the clamping motor 72.

[0032] As a preferred embodiment, a driving gear 721 is connected to the clamping motor 72, and clamping gear plates 711 are connected to both groups of inner support clamping blocks 71. The two clamping gear plates 711 are centrosymmetric with each other, and both clamping gear plates 711 are meshed with the driving gear 721. Further, the driving gear 721 is driven by the clamping motor 72 to rotate, and during the rotation of the driving gear 721, the two clamping gear plates 711 are driven to move relatively or towards each other, so as to drive the two inner support clamping blocks 71 to complete the clamping or loosening work through the two clamping gear plates 711.

[0033] As a preferred embodiment, a valve body cooling block 8 is connected to the side of the mounting connection block 62 away from the telescopic rod 61, and the center point of the valve body cooling block 8 and the midpoint between the two inner support clamping blocks 71 are on the same straight line. A water spraying connection block 9 is connected below the mounting connection block 62. Further, the valve body cooling block 8 is used to wrap the valve body of the air-conditioning electronic expansion valve to prevent the valve body of the air-conditioning electronic expansion valve from being damaged by the flame during the welding of the pipeline.

[0034] As a preferred embodiment, a cooling spray head 92 is connected to the side of the water spraying connection block 9 close to the valve body cooling block 8, and a connecting spring tube 91 is connected to the bottom of the water spraying connection block 9, and one end of the connecting spring tube 91 is connected to the cooling water pump 42. Further, the cooling water in the cooling water tank 4 is pumped by the cooling water pump 42 through the connecting spring tube 91 to the water spraying connection block 9 and the cooling spray head 92, and the cooling water is sprayed from the cooling spray head 92 to the valve body cooling block 8, so that the cooling water pump in the valve body cooling block 8 is cooled, and the valve body of the electronic expansion valve is prevented from being damaged due to excessive temperature.

[0035] As a preferred embodiment, a connecting rotating shaft 81 is connected between the valve body cooling block 8 and the mounting connection block 62, and a connecting bearing 621 is arranged at the connection between the connecting rotating shaft 81 and the mounting connection block 62. A water-absorbing sponge 83 is connected to the inner wall of the valve body cooling block 8. Further, during the rotation welding process, the valve body cooling block 8 is driven to rotate by the valve body of the electronic expansion valve clamped inside it, and the valve body cooling block 8 can rotate in the mounting connection block 62 through the connecting rotating shaft 81 and the connecting bearing 621.

[0036] As a preferred embodiment, a pipe connection groove 84 and a water inlet and water passing plate 85 are respectively arranged on both sides of the valve body cooling block 8, and an extrusion clamping head 82 is arranged at the central position inside the valve body cooling block 8. Further, the pipeline connected to the valve body of the electronic expansion valve can be placed in the pipe connection groove 84. During the cooling process, the cooling water is sprayed from the cooling spray head 92 to the water inlet and water passing plate 85 for cooling. The cooling water is absorbed by the water-absorbing sponge 83, and the water-absorbing sponge 83 wraps the valve body of the electronic expansion valve for cooling, while during clamping, the valve body of the electronic expansion valve is fixed by the extrusion clamping head 82.

[0037] The working process of the present utility model is as follows: First, the cooling water tank 4 can perform water inlet and drainage operations through the water inlet and drainage holes 41. The pipeline welding work of the electronic expansion valve is completed on the processing base 1. One end of the pipeline of the air-conditioning electronic expansion valve is fixed by the inner support fixture 7 on the rotating bracket 2. The clamping motor 72 drives the driving gear 721 to rotate, and during the rotation of the driving gear 721, it drives two groups of clamping gear plates 711 to move relatively or towards each other, so as to drive two groups of inner support blocks 71 to complete the clamping or loosening work through the two groups of clamping gear plates 711;

[0038] Then, the clamping cylinder 6 on the fixed support frame 3 drives the telescopic rod 61 and the connected installation connection block 62 to move towards the inner support fixture 7, and during the movement, the extrusion clamping head 82 presses the valve body of the electronic expansion valve to fix it. The pipeline connected to the valve body of the electronic expansion valve can be placed in the pipe connection groove 84, so as to complete the clamping work of the electronic expansion valve;

[0039] After the air-conditioning electronic expansion valve is fixedly clamped, the rotating motor 5 drives the driving rotating shaft 51 to rotate, and during the rotation of the driving rotating shaft 51, it drives the electronic expansion valve to perform rotational welding work. During the rotational welding process, the valve body cooling block 8 is driven to rotate by the valve body of the electronic expansion valve clamped inside it, and the valve body cooling block 8 can be connected to the rotating shaft 81 and the connecting bearing 621 to rotate inside the installation connection block 62;

[0040] During the welding and cooling process, the valve body cooling block 8 is used to wrap the valve body of the air-conditioning electronic expansion valve to prevent the valve body of the air-conditioning electronic expansion valve from being damaged by the flame when welding the pipeline. The cooling water pump 42 pumps the water in the cooling water tank 4 through the connecting spring tube 91 to the water spraying connection block 9 and the cooling spray head 92, and the cooling spray head 92 sprays cooling water towards the valve body cooling block 8. During the cooling process, the cooling spray head 92 sprays water to cool the water inlet and water passing plate 85. The cooling water is absorbed by the water absorption sponge 83, and the water absorption sponge 83 wraps the valve body of the electronic expansion valve to cool it, so that the cooling water pump inside the valve body cooling block 8 cools down, avoiding damage to the valve body of the electronic expansion valve due to excessive temperature. The above is the working principle of the fixture for processing the automotive air-conditioning electronic expansion valve.

Claims

1. A fixture for processing an electronic expansion valve of an automobile air conditioner, comprising a processing base (1), characterized in that: The two ends of the top of the processing base (1) are respectively connected to a rotating support frame (2) and a fixed support frame (3), and a cooling water pool (4) is arranged between the rotating support frame (2) and the fixed support frame (3), one side of the cooling water pool (4) is provided with an inlet and outlet hole (41), and a cooling water pump (42) is arranged in the cooling water pool (4); The rotating support frame (2) is connected to a rotating motor (5), the rotating motor (5) is provided with a driving shaft (51), the end of the driving shaft (51) away from the rotating motor (5) is connected to an inner support fixture (7), the fixed support frame (3) is connected to a clamping cylinder (6), a telescopic rod (61) is provided in the clamping cylinder (6), and the end of the telescopic rod (61) close to the inner support fixture (7) is connected to a mounting connection block (62).

2. The fixture for processing an electronic expansion valve of an automobile air conditioner according to claim 1, characterized in that: Two groups of inner support clamping blocks (71) are arranged on a side of the inner support clamp (7) close to the fixed support frame (3), and a clamping motor (72) is arranged on a side of the inner support clamp (7) away from the inner support clamping blocks (71).

3. The fixture for processing an electronic expansion valve of an automobile air conditioner according to claim 2 is characterized in that: The clamping motor (72) is connected to a driving gear (721), and the two groups of inner support clamping blocks (71) are both connected to a clamping gear plate (711). The two groups of clamping gear plates (711) are centrally symmetrical to each other, and the two groups of clamping gear plates (711) are meshed with the driving gear (721).

4. The fixture for processing an electronic expansion valve of an automobile air conditioner according to claim 2, characterized in that: A valve body cooling block (8) is connected to the side of the installation connection block (62) away from the telescopic rod (61), and the center point of the valve body cooling block (8) and the midpoint between the two groups of inner support clamping blocks (71) are on the same straight line. A water spray connection block (9) is connected below the installation connection block (62).

5. The fixture for processing the electronic expansion valve of an automobile air conditioner according to claim 4 is characterized in that: A cooling nozzle (92) is connected to one side of the water spray connection block (9) close to the valve body cooling block (8), a connecting spring tube (91) is connected to the bottom of the water spray connection block (9), and one end of the connecting spring tube (91) is connected to the cooling water pump (42).

6. The fixture for processing an electronic expansion valve of an automobile air conditioner according to claim 1, characterized in that: A connecting shaft (81) is connected between the valve body cooling block (8) and the mounting connection block (62), and a connecting bearing (621) is provided at the connection between the connecting shaft (81) and the mounting connection block (62). The inner wall of the valve body cooling block (8) is connected to a water-absorbing sponge (83).

7. The fixture for processing an electronic expansion valve of an automobile air conditioner according to claim 6, characterized in that: The two sides of the valve body cooling block (8) are respectively provided with a pipe body connecting groove (84) and a water inlet plate (85), and the center position of the valve body cooling block (8) is provided with an extrusion clamping head (82).

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