A valve processing fixture

Abstract

This invention relates to a valve processing fixture applied in the field of valve processing technology, comprising a chuck device, a clamping device, and a clamping intelligent controller; the chuck device includes a first chuck and a second chuck, which are vertically aligned and have corresponding sliders on their opposing surfaces; the clamping device has limiting grooves at its top and bottom that match the sliders of the chuck device, and a sliding groove on its side, where a pressure sensor is installed, and a locking component is installed in the limiting groove; the clamping intelligent controller is mounted on the chuck device and includes a central control module, an instruction module, and a detection module; in this valve processing fixture, the idle time during valve processing is fully utilized. After valve processing is completed, only the clamping device needs to be replaced for the next processing cycle. The pressure sensor enables precise control during valve clamping, improving valve processing quality and efficiency.

Description

Technical Field

[0001] The invention relates to a clamp, in particular to a valve processing clamp applied in the technical field of valve processing. Background Art

[0002] Valves are key control components in fluid conveying systems. They have multiple functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion and overflow pressure relief. Valves are available in a wide variety of varieties and specifications. With the continuous development of society, valves are increasingly used and market demand continues to increase, which has promoted the continuous growth of valve processing equipment. However, during the valve processing, some fixtures are prone to loosening when clamping, and adjustments are complicated and time-consuming, resulting in reduced processing accuracy and production efficiency.

[0003] Chinese invention patent CN201910987928.6 discloses a clamp for quickly fixing a valve body, which includes a base, two groups of vertical support frames arranged on the base, a horizontal support frame connecting the two groups of support frames, a crossbeam connecting the support frames, and a pressing mechanism arranged in the middle of the crossbeam and a horizontal limiting mechanism on the base; the base adopts a U-shaped structure, with a slide groove provided inside, and a U-shaped support block for placing the valve body is slidably provided in the slide groove, and horizontal limit plates extending into the base are provided on both sides of the support block; there is also a limit groove for accommodating the limit plate in the base, and the limit is performed by a fastening bolt that passes through the upper part and extends into the limit groove, which can stably and quickly clamp the valve body and reduce the clamping time of the valve body.

[0004] Although this solution has taken into account the problem of long valve clamping time, its efficiency still needs to be improved. During clamping, the valve body is installed and locked on the corresponding fixture of the processing equipment. After the processing is completed and the valve body is removed, the new valve body can be installed and locked on the fixture. As a result, it takes a long time to lock the valve body to the fixture, affecting the processing efficiency of the valve. In addition, the adjustment of the clamping force is not fully considered. Excessive clamping force may damage the valve body, while too little force may cause safety hazards during the processing process. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the valve body is installed and locked on the corresponding fixture of the processing equipment. After the processing is completed and the valve body is removed, a new valve body can be installed and locked on the fixture. As a result, it takes a long time to lock the valve body to the fixture, affecting the processing efficiency of the valve. In addition, the adjustment of the clamping force is not fully considered. Excessive clamping force may damage the valve body, while too small a force may cause safety hazards during the processing.

[0006] In order to solve the above problems, the present invention provides a valve processing fixture, comprising: a chuck device, a clamping device, and a clamping intelligent controller;

[0007] The chuck device comprises a chuck 1 and a chuck 2 which are arranged opposite to each other, and sliders are installed on the opposite surfaces of the chuck 1 and the chuck 2;

[0008] The clamping device comprises a clamping mechanism 1 and a clamping mechanism 2, wherein a limiting groove 1 matching the slider on the chuck 1 is provided at the top of the clamping mechanism 1, a sliding groove 1 is provided at the side of the clamping mechanism 1, a limiting groove 2 matching the slider on the chuck 2 is provided at the bottom of the clamping mechanism 2, a sliding groove 2 is provided at the side of the clamping mechanism 2, a pressure sensor 1 is installed in the sliding groove 1 and the sliding groove 2, and a locking assembly is installed inside the limiting groove 1 and the limiting groove 2;

[0009] The clamping intelligent controller is installed on the chuck device. The clamping intelligent controller is provided with a general control module, an instruction module, and a detection module. The general control module is electrically connected to the instruction module and the detection module respectively, the instruction module is electrically connected to the locking component, and the detection module is electrically connected to the locking component and a pressure sensor.

[0010] In the above-mentioned valve processing fixture, the idle time of the valve processing process is fully utilized, and the valve is pre-loaded into the clamping device. After the valve processing is completed, only the clamping device needs to be replaced to proceed with the next processing. The pressure sensor can achieve precise control of the valve clamping, thereby improving the valve processing quality and efficiency.

[0011] As a further improvement of the present application, both the clamping mechanism 1 and the clamping mechanism 2 are installed with a pre-locking mechanism for pre-locking the clamping mechanism 1 and the clamping mechanism 2, and the pre-locking mechanism includes a locking groove and a rack plugged into the locking groove.

[0012] As a further improvement of the present application, the pre-locking mechanism also includes a locking support shell connected to the clamping mechanism 2, the rack is connected to the clamping mechanism 1, the locking support shell is installed with a driving member 2, the output end of the driving member 2 is installed with a driving gear, the driving gear is meshed with the bevel gear through teeth, the bevel gear is rotatably connected to the locking support shell through a connecting rod, the connecting rod on the bevel gear is fixedly connected with a pawl, the rack is meshed with the pawl through teeth, and the instruction module is electrically connected to the driving member 2.

[0013] As a further improvement of the present application, four groups of pre-locking mechanisms are provided, which are respectively located at the four corners corresponding to the positions of the clamping mechanism one and the clamping mechanism two.

[0014] As another improvement of the present application, both the clamping mechanism 1 and the clamping mechanism 2 are installed with a limiting assembly, and the limiting assembly includes a push plate and an electric push rod installed with the push plate.

[0015] As another improved supplement of the present application, electric push rods are installed at the four corners of the push plate, a limiting groove is opened on the surface of the push plate, a second pressure sensor is installed in the limiting groove, the command module is electrically connected to the electric push rod, and the detection module is electrically connected to the second pressure sensor.

[0016] As another improvement of the present application, electric push rods are installed at the four corners of the push plate, and multiple sliders are provided on the push chuck 1 and chuck 2, and the multiple sliders are arranged in parallel. Chuck 2 is installed with a driving member 1, and a threaded shaft is fixed at the output end of the driving member 1. Chuck 1 is threadedly connected to the threaded shaft, and the instruction module is electrically connected to the driving member 1.

[0017] As another improvement of the present application, the locking assembly includes a locking limiting shell, a lock head installed in the locking limiting shell, and a spring installed between the lock head and the locking limiting shell. An electromagnet and a Hall sensor are installed inside the locking limiting shell, the command module is electrically connected to the electromagnet, and the detection module is electrically connected to the Hall sensor.

[0018] In summary, the clamping device and the pre-clamping mechanism can fully utilize the idle time of the valve processing process, pre-load the valve into the clamping device, and preliminarily fix the valve through the pre-clamping mechanism. After the valve processing is completed, the clamping device is replaced to fix the valve more firmly through the combined action of the limiting component, chuck one and chuck two, and the pressure sensor can achieve precise control of the valve clamping, thereby improving the valve processing quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the first and second embodiments of the present application;

[0020] Figure 2 This is a front view structural schematic diagram of a clamping device of the first and second embodiments of the present application;

[0021] Figure 3 A schematic side view of a clamping device of the first and second embodiments of the present application;

[0022] Figure 4 This is a schematic diagram of the locking assembly structure of the first and second embodiments of the present application;

[0023] Figure 5 This is a schematic diagram of the pre-locking mechanism structure of the first and second embodiments of the present application;

[0024] Figure 6 This is a control principle diagram of the clamping intelligent controller of the first embodiment of the present application;

[0025] Figure 7 This is a schematic diagram of the structure of a restriction component according to a second embodiment of the present application;

[0026] Figure 8 This is a schematic diagram of a valve clamped by a fixture according to a second embodiment of the present application;

[0027] Fig. 9 This is a control schematic diagram of the clamping intelligent controller of the second embodiment of the present application.

[0028] Description of the numbers in the figure:

[0029] 1. Chuck 1; 2. Chuck 2; 201. Driving member 1; 202. Threaded shaft; 3. Clamping mechanism 1; 301. Limiting groove 1; 302. Sliding groove 1; 4. Clamping mechanism 2; 401. Limiting groove 2; 402. Sliding groove 2; 5. Sliding block; 6. Locking assembly; 601. Locking limiting shell; 602. Spring; 603. Locking head; 604. Electromagnet; 605. Hall sensor; 7. Pressure sensor 1; 8. Clamping intelligent controller; 9. Limiting assembly; 901. Push plate; 902. Electric push rod; 903. Limiting groove; 904. Pressure sensor 2; 10. Pre-locking mechanism; 1001. Locking support shell; 1002. Rack; 1003. Driving member 2; 1004. Driving gear; 1005. Bevel gear; 1006. Ratchet. DETAILED DESCRIPTION

[0030] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0031] The first implementation method:

[0032] Figure 1-Figure 6 A valve processing fixture is shown, including a chuck device, a clamping device, and a clamping intelligent controller 8;

[0033] The chuck device comprises a chuck 1 and a chuck 2 which are arranged opposite to each other, and a slider 5 is installed on the opposite surfaces of the chuck 1 and the chuck 2;

[0034] The clamping device includes a clamping mechanism 1 3 and a clamping mechanism 2 4. A limiting groove 1 301 matching the slider 5 on the chuck 1 1 is provided at the top of the clamping mechanism 1 3, a sliding groove 1 302 is provided on the side of the clamping mechanism 1 3, a limiting groove 2 401 matching the slider 5 on the chuck 2 2 is provided at the bottom of the clamping mechanism 2 4, a sliding groove 2 402 is provided on the side of the clamping mechanism 2 4, a pressure sensor 1 7 is installed in the sliding groove 1 302 and the sliding groove 2 402, and a locking component 6 is installed inside the limiting groove 1 301 and the limiting groove 2 401;

[0035] The slider 5 installed in the chuck device is provided for loading the clamping device onto the chuck device. When the clamping device is loaded onto the chuck device, the slider 5 will be clamped into the limit groove 1 301 and the limit groove 2 401 of the clamping mechanism 1 3 and the clamping mechanism 2 4, so that the clamping device moves along the trajectory of the limit groove 1 301 and the limit groove 2 401 (a preferred limit groove trajectory is L-shaped). After moving along the trajectory of the limit groove 1 301 and the limit groove 2 401, the locking component 6 will be triggered to lock the clamping mechanism onto the chuck device to ensure the safety of valve processing.

[0036] The clamping intelligent controller 8 is installed on the chuck device. The clamping intelligent controller 8 is provided with a general control module, an instruction module, and a detection module. The general control module is electrically connected to the instruction module and the detection module respectively, the instruction module is electrically connected to the locking component 6, and the detection module is electrically connected to the locking component 6 and the pressure sensor 7.

[0037] Both the clamping mechanism 1 3 and the clamping mechanism 2 4 are equipped with a pre-locking mechanism 10 for pre-locking the clamping mechanism 1 3 and the clamping mechanism 2 4. Pre-locking the clamping mechanism 1 3 and the clamping mechanism 2 4 can reduce the possibility of the valve being offset during the clamping process. After the valve is loaded, it is also more convenient to load the clamping device onto the chuck device. The pre-locking mechanism 10 includes a locking groove and a rack 1002 plugged into the locking groove. The pre-locking mechanism also includes a locking support shell 1001 connected to the clamping mechanism 2 4. The rack 1002 is connected to the clamping mechanism 1 3. The driving member 2 1003 is installed on the locking support shell 1001. The output end of the driving member 2 1003 is equipped with a driving gear 1004. The driving gear 1004 is meshed with the bevel gear 1005 through teeth. The bevel gear 1005 is connected to the locking support shell 1001 through a connecting rod. Rotational connection, the connecting rod on the bevel gear 1005 is fixedly connected with a pawl 1006, the rack 1002 is meshed with the pawl 1006 through the teeth, the instruction module is electrically connected to the driving member 1003, and the pre-locking mechanism 10 realizes the fixation of the rack 1002 and the locking groove by meshing the rack 1002 with the pawl 1006. When locking is required, the driving member 1003 is actuated to drive the driving gear 1004 to rotate, and the driving gear 1004 drives the bevel gear 1005 to rotate. When the bevel gear 1005 rotates, the pawl 1006 is driven to rotate synchronously. The pawl 1006 rotates inwardly, gets stuck in the tooth gap of the rack 1002 and meshes with the rack 1002, making it unable to move. When unlocking, the driving member 1003 acts in the opposite direction, drives the pawl 1006 to rotate outwardly, and rotates out from the tooth gap of the rack 1002, so that the rack 1002 can move freely. The pre-locking mechanism 10 is provided with four groups, which are respectively located at the four corners of the corresponding positions of the clamping mechanism 1 3 and the clamping mechanism 2 4. The pre-locking mechanism 10 is provided at the four corners to ensure that the possibility of the clamping mechanism 1 3 and the clamping mechanism 2 4 is reduced when they are close to each other, and also reduce the possibility that the sliding groove 1 302 and the sliding groove 2 402 are not in contact with the valve after the pre-locking is completed.

[0038] When clamping before valve processing, it is necessary to open the pre-locking mechanism 10 first, and the clamping intelligent controller 8 controls the action of the driving part 2 1003 through the instruction module. The driving part 2 1003 drives the driving gear 1004 to rotate. The bevel gear 1005 rotates while driving the ratchet 1006 to rotate synchronously. The ratchet 1006 rotates outward and rotates out from the tooth gap of the rack 1002, so that the clamping mechanism 1 3 can move up and down. The clamping mechanism 1 3 is lifted up to leave enough space, and the processed valve can be placed on the clamping mechanism 2 4. The two ends of the valve are aligned. The sliding groove 402 should be placed. After the valve is placed, the clamping mechanism 3 is moved downward, and the sliding groove 302 clamps the two ends of the valve. At this time, the main control module compares the pressure data of the pressure sensor 7 sent by the detection module with the pre-clamping pressure (the pre-clamping pressure for clamping the current valve body is preset in the main control module). When the pressure is appropriate, the main control module controls the driving member 1003 through the instruction module to press the ratchet 1006 downward and re-engage with the rack 1002. The clamping mechanism 3 stops moving and the pre-clamping of the valve is completed.

[0039] First, move the chuck device to the specified position. The chuck device includes chuck 1 and chuck 2. The opposite surfaces of chuck 1 and chuck 2 are installed with sliders 5. Multiple sliders 5 are provided. Multiple sliders 5 are arranged in parallel. Push the clamping device laterally to make the limit groove 1 301 and the limit groove 2 401 slidably connected with the slider 5. The limit groove 1 301 and the limit groove 2 401 are provided with locking components 6. The locking components 6 include a locking limiting shell 601, a lock head 603 installed in the locking limiting shell 601, and a spring 602 installed between the lock head 603 and the locking limiting shell 601. A Hall sensor 605 is installed inside the locking limiting shell 601. The detection module and the Hall sensor 605 are electrically connected. The clamping device moves along the trajectory of the limit groove 1 301 and the limit groove 2 401. First, push the clamping device laterally. The slider 5 squeezes the lock head 603 of the locking assembly 6, so that the lock head 603 moves toward the inside of the locking limit shell 601 and compresses the spring 602. At the same time, the Hall sensor 605 detects that the position of the lock head 603 has changed, and sends information to the detection module, which sends the information to the main control module. When the slider 5 moves to the corner of the limit groove 1 301 and the limit groove 2 401, the clamping device is pushed longitudinally. After pushing a distance, the slider 5 moves to the end of the track of the limit groove 1 301 and the limit groove 2 401. At the same time, due to the movement of the clamping device, the slider 5 no longer resists the lock head 603, and the lock head 603 pops out, locking the slider 5 in the limit groove 1 301 and the limit groove 2 401. The Hall sensor 605 detects the position change of the lock head 603 again, and sends information to the detection module, which sends the information to the main control module.

[0040] The chuck 2 is installed with a driving member 201, and a threaded shaft 202 is fixed at the output end of the driving member 201. The chuck 1 is threadedly connected with the threaded shaft 202, and the instruction module is electrically connected with the driving member 201. After receiving the information, the master control module controls the driving member 201 to move through the instruction module, driving the threaded shaft 202 to rotate. The rotation of the threaded shaft 202 drives the chuck 1 to move toward the chuck 2, so that the chuck device is clamped. After the chuck device is tightly fitted with the clamping device, the driving member 1003 is controlled to drive the driving gear 1004 to rotate. The bevel gear 1005 rotates while driving the ratchet 1006 to rotate synchronously. The ratchet 1006 rotates outward, and the gear is rotated. The rack 1002 is screwed out from the tooth gap of the rack 1002. At this time, the master control module compares the pressure data of the pressure sensor 7 sent by the detection module with the specified pressure (the master control module has a preset more suitable pressure for clamping the current valve body). When the difference between the pressure data and the specified pressure is within a certain error range, the master control module controls the drive member 201 to stop and maintain the position through the instruction module, and controls the drive member 1003 to move in the opposite direction. The ratchet 1006 rotates inward and is stuck in the tooth gap of the rack 1002 and meshes with the rack 1002. At this time, the clamping is completed and the valve processing begins. The clamping operation of the next valve can be repeated during the valve processing.

[0041] When the valve processing is completed, the master control module controls the driving member 201 to move in the reverse direction through the command module, driving the threaded shaft 202 to rotate in the reverse direction, loosening the chuck device, and then controlling the locking assembly 6 to unlock. An electromagnet 604 is installed inside the locking limit housing 601. The command module and the electromagnet 604 are electrically connected. The command module controls the electromagnet 604 to be energized to suck the lock head 603 back into the locking limit housing 601. The detection module determines whether the clamping device is taken out through the Hall sensor 605. After the clamping device is taken out from the chuck device, the command module controls the electromagnet 604 to be de-energized, and the lock head 603 pops up again; when the lock head 603 returns to the locking limit shell 601, the clamping device is pulled longitudinally, and when the slider 5 moves to the corner of the limit groove 1 301 and the limit groove 2 401, the clamping device is pulled horizontally to remove the clamping device from the chuck device; the instruction module controls the driving member 2 1003 to rotate the pawl 1006 outward and rotate it out from the tooth gap of the rack 1002, and then move the clamping mechanism 1 3 upward to take out the processed valve. After the clamping device is removed, the steps can be repeated for the clamping device that clamps the valve, and it can be loaded onto the chuck again for processing.

[0042] The second implementation method:

[0043] Figure 1-Figure 5 and Figure 7-Figure 9A valve processing fixture is shown. Different from the first embodiment, considering that the valve is clamped and fixed by a clamping device, the two ends of the valve are clamped only by sliding groove 1 302 and sliding groove 2 402. During the processing, the valve may rotate or deviate. Therefore, a limiting component 9 is added to the clamping device to further improve the stability of the fixture clamping.

[0044] Both the clamping mechanism 1 3 and the clamping mechanism 2 4 are installed with a limiting component 9, which includes a push plate 901 and an electric push rod 902 installed with the push plate 901. When the limiting component 9 needs to fix the valve, the electric push rod 902 extends out to drive the push plate 901 to move and make it close to the valve body. The four corners of the push plate 901 are installed with electric push rods 902, which can make the push plate 901 in the process of fixing the valve. The pressure of the push plate 901 on the valve is more balanced, reducing the possibility of damaging the valve body. The surface of the push plate 901 is provided with a limiting groove 903 (a preferred limiting groove 903 can adjust the style of the limiting groove 903 according to the processing of the valve body). The opening of the limiting groove 903 can effectively reduce the possibility of valve displacement. A pressure sensor 2 904 is installed in the limiting groove 903, the instruction module is electrically connected to the electric push rod 902, and the detection module is electrically connected to the pressure sensor 2 904.

[0045] After the clamping device is loaded onto the chuck device and the chuck device has adjusted the clamping device and the valve pressure to the specified pressure, the master control module controls the electric push rod 902 to extend through the command module, driving the push plate 901 to approach the valve. After the push plate 901 moves a certain distance, the limiting groove 903 on the push plate 901 is close to the valve body of the valve. At this time, the master control module compares the pressure data of the pressure sensor 2 904 sent by the detection module with the limiting pressure (the master control module has a preset limiting pressure for clamping the current valve body). When the difference between the pressure data and the specified pressure is within a certain range, the command module controls the electric push rod 902 to stop moving and maintain its position. When the valve body processing is completed and the clamping device is removed, the command module controls the electric push rod 902 to retract to the initial position, waiting for the next clamping.

[0046] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A valve processing fixture, characterized in that: It includes: Chuck device, clamping device, clamping intelligent controller (8); The chuck device comprises a chuck 1 (1) and a chuck 2 (2) which are arranged opposite to each other, and a slider (5) is installed on the opposite surfaces of the chuck 1 (1) and the chuck 2 (2); The clamping device comprises a clamping mechanism 1 (3) and a clamping mechanism 2 (4); the clamping mechanism 1 (3) is provided with a limiting groove 1 (301) on the top thereof and matched with the slider (5) on the chuck 1 (1); the clamping mechanism 1 (3) is provided with a sliding groove 1 (302) on the side thereof; the clamping mechanism 2 (4) is provided with a limiting groove 2 (401) on the bottom thereof and matched with the slider (5) on the chuck 2 (2); the clamping mechanism 2 (4) is provided with a sliding groove 2 (402) on the side thereof; the sliding groove 1 (302) and the sliding groove 2 (402) are both provided with a pressure sensor 1 (7); and the limiting groove 1 (301) and the limiting groove 2 (401) are both provided with a locking assembly (6); The clamping intelligent controller (8) is installed on the chuck device, and is provided with a general control module, an instruction module, and a detection module. The general control module is electrically connected to the instruction module and the detection module respectively, the instruction module is electrically connected to the locking component (6), and the detection module is electrically connected to the locking component (6) and the pressure sensor 1 (7); The clamping mechanism one (3) and the clamping mechanism two (4) are both provided with a pre-locking mechanism (10) for pre-locking the clamping mechanism one (3) and the clamping mechanism two (4), and the pre-locking mechanism (10) comprises a locking groove and a rack (1002) plugged into the locking groove; The clamping mechanism one (3) and the clamping mechanism two (4) are both installed with a limiting component (9), and the limiting component (9) includes a push plate (901) and an electric push rod (902) installed with the push plate (901), and the four corners of the push plate (901) are each installed with an electric push rod (902), and a limiting groove (903) is provided on the surface of the push plate (901), and a pressure sensor two (904) is installed in the limiting groove (903), the command module is electrically connected to the electric push rod (902), and the detection module is electrically connected to the pressure sensor two (904).

2. A valve processing fixture according to claim 1, characterized in that: The pre-locking mechanism (10) further comprises a locking support shell (1001) connected to the second clamping mechanism (4); the rack (1002) is connected to the first clamping mechanism (3); a second driving member (1003) is mounted on the locking support shell (1001); a driving gear (1004) is mounted on the output end of the second driving member (1003); the driving gear (1004) is meshed with a bevel gear (1005) through teeth; the bevel gear (1005) is rotationally connected to the locking support shell (1001) through a connecting rod; a ratchet (1006) is fixedly connected to the connecting rod on the bevel gear (1005); the rack (1002) is meshed with the ratchet (1006) through teeth; and the instruction module is electrically connected to the second driving member (1003).

3. A valve processing fixture according to claim 2, characterized in that: The pre-locking mechanism (10) is provided in four groups, which are respectively located at the four corners corresponding to the positions of the clamping mechanism one (3) and the clamping mechanism two (4).

4. A valve processing fixture according to claim 1, characterized in that: A plurality of sliders (5) are provided on the chuck 1 (1) and the chuck 2 (2), and the plurality of sliders (5) are arranged in parallel. The chuck 2 (2) is provided with a driving member 1 (201), a threaded shaft (202) is fixed to the output end of the driving member 1 (201), the chuck 1 (1) is threadedly connected to the threaded shaft (202), and the instruction module is electrically connected to the driving member 1 (201).

5. A valve processing fixture according to claim 1, characterized in that: The locking assembly (6) comprises a locking limiting shell (601), a lock head (603) installed in the locking limiting shell (601), and a spring (602) installed between the lock head (603) and the locking limiting shell (601); an electromagnet (604) and a Hall sensor (605) are installed inside the locking limiting shell (601); the instruction module is electrically connected to the electromagnet (604); and the detection module is electrically connected to the Hall sensor (605).

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