Punching machine for water heating equipment production

Abstract

The utility model relates to the technical field of water heating equipment production, in particular to a punching machine for water heating equipment production, which comprises a clamping screw rod, a knob, a sliding clamping block, a clamping roller, a rotating motor, a rotating disc, a connecting support column, an elastic clamping plate and a clamping spring, a rotary knob is arranged on the side face of the clamping screw, a sliding clamping block is arranged on the outer side of the clamping screw, a clamping roller is arranged in the sliding clamping block, a rotating disc is arranged at the output end of the rotating motor, a connecting supporting column is arranged on the side face of the rotating disc, an elastic clamping plate is arranged on the side face of the rotating disc, and a clamping spring is arranged on the side face of the elastic clamping plate. One end of a pipe can be clamped and limited through the limiting structure, the pipe can be conveniently clamped and fixed through the clamping assembly, the clamped and fixed pipe can be conveniently rotated and adjusted through the rotating structure, and therefore the pipe can be prevented from deviating in the process of adjusting the angle of the pipe; and the precision of pipe punching is prevented from being influenced.

Description

Technical Field

[0001] This utility model relates to the field of plumbing equipment manufacturing technology, and in particular to a punching machine for plumbing equipment manufacturing. Background Technology

[0002] Plumbing equipment refers to various components and devices used for the installation and maintenance of water pipe systems. These devices are commonly used in residential, commercial, and industrial buildings to ensure the supply, distribution, and drainage of water. During the production process, some pipes need to be drilled to ensure precise connections between the plumbing equipment.

[0003] Existing plumbing fixture punching devices are inconvenient for clamping and fixing pipes during use. When punching holes at different locations on the pipe, it is difficult to adjust the pipe, and the pipe is prone to shifting during adjustment, resulting in errors in the punching position and affecting the accuracy of punching.

[0004] Therefore, to address the aforementioned problems of inconvenience in clamping and fixing pipes, and the tendency for pipes to shift during adjustment, a punching machine for plumbing equipment production can be designed. By setting up a clamping structure, the pipes can be easily clamped and fixed. Then, by adjusting the structure, the clamped and fixed pipes can be rotated and adjusted, thereby preventing the pipes from shifting during adjustment and avoiding affecting the accuracy of the pipe punching. Utility Model Content

[0005] To overcome the problems encountered during the use of the plumbing fixture punching device, such as the inconvenience of clamping and fixing pipes, the difficulty of adjusting the pipes when punching at different locations, and the tendency for the pipes to shift during adjustment, resulting in errors in the punching position and affecting the accuracy of the punching.

[0006] The technical solution of this utility model is as follows: a punching machine for producing plumbing equipment, comprising plumbing pipes, a base assembly, a support assembly, a clamping screw, a knob, a sliding clamp, a clamping roller, a rotating motor, a rotating disk, a connecting support column, an elastic clamp, a clamping spring, a sliding assembly, and a drilling assembly; the base assembly is provided on the bottom surface of the plumbing pipes, the support assembly is provided on the bottom surface of the base assembly, the clamping screw is provided inside the base assembly, the knob is provided on the side of the clamping screw, the sliding clamp is provided on the outside of the clamping screw, the clamping roller is provided inside the sliding clamp, the rotating motor is provided on the side of the support assembly, the rotating disk is provided at the output end of the rotating motor, the connecting support column is provided on the side of the rotating disk, the elastic clamp is provided on the side of the rotating disk, the clamping spring is provided on the side of the elastic clamp, the sliding assembly is provided on the side of the support assembly, and the drilling assembly is provided on the top surface of the sliding assembly.

[0007] Preferably, the base assembly provides support for the plumbing pipes, and the support assembly provides stable support for the entire device. A knob drives the clamping screw to rotate, which in turn drives the clamping rollers on the sliding clamp to clamp and fix the plumbing pipes. When the plumbing pipes are pushed into the device, the connecting support and elastic clamp are inserted into the interior of the pipes. The elastic force of the clamping spring pushes the elastic clamp to press against the inner wall of the pipes, thus clamping and connecting the pipes to the elastic clamp. A rotating motor drives the rotating disk to rotate, changing the angle of the pipes and facilitating punching at different locations. The sliding assembly moves the punching assembly to adjust the punching spacing, and the punching assembly performs drilling on the plumbing pipes.

[0008] Preferably, the base assembly includes a support base, collection holes, and a collection box; the bottom surface of the plumbing pipe is provided with a support base, the top surface of the support base is provided with a collection hole, and multiple sets of collection holes are provided; the inner side of the support base is provided with a collection box, which is slidably connected to the support base. The support base provides support for the plumbing pipe, which facilitates the clamping and punching of the plumbing pipe. Waste generated during the punching process of the plumbing pipe falls into the collection box through the collection holes for collection.

[0009] Preferably, the support assembly includes a punching box, a feed hole, support columns, and anti-slip pads. The bottom surface of the support base is provided with a punching box, the side of the punching box is provided with a feed hole, the bottom surface of the punching box is provided with support columns, there are six sets of support columns, and the bottom surface of the support columns is provided with anti-slip pads. The feed hole facilitates the placement of the plumbing pipes to be processed into the punching box for processing. The support columns provide support for the entire device, and the anti-slip pads prevent the device from shifting or sliding during operation.

[0010] Preferably, the support base is equipped with a clamping screw, which is rotatably connected to the punching box. A knob is provided at the other end of the clamping screw. Two sets of sliding clamps and three sets of clamping rollers are provided. The clamping rollers are rotatably connected to the sliding clamps. By rotating the knob, the clamping screw is rotated. The two sets of opposing threads on the clamping screw drive the two sets of sliding clamps to slide towards each other on the clamping screw, thereby clamping and fixing the placed plumbing pipes. The clamping rollers not only clamp and fix the plumbing pipes but also facilitate their rotation, thus making it easier to punch the pipes at different angles.

[0011] Preferably, a rotating motor is installed on the side of the punching box, and four sets of elastic clamping plates are provided. Two sets of clamping springs are installed on the inner side of the elastic clamping plates and are located on the outer side of the connecting support. When the plumbing pipe is pushed into the device through the feed hole, the connecting support and elastic clamping plates are inserted into the interior of the plumbing pipe to limit its movement. The elastic force of the clamping springs pushes the elastic clamping plates to squeeze the inner wall of the plumbing pipe, thereby increasing the friction between the elastic clamping plates and the plumbing pipe and clamping them together. The rotating motor drives the rotating disk to rotate, and the connecting support and elastic clamping plates drive the plumbing pipe to rotate, thereby changing the angle of the plumbing pipe and facilitating punching at different positions on the plumbing pipe.

[0012] Preferably, the sliding assembly includes a sliding motor, a threaded rod, a support slider, and a support frame. The sliding motor is located on the side of the punching box, and a threaded rod is located at the output end of the sliding motor. A support slider is located on the outside of the threaded rod, and the support slider is located on the side of the support base. A support frame is located on the top surface of the support slider. The sliding motor drives the threaded rod to rotate, and the support slider moves the support frame, thereby changing the position of the drill bit and facilitating the adjustment of the drilling spacing.

[0013] Preferably, the drilling assembly includes an electric push rod, a support plate, a drilling motor, a drill bit, a slide rod, a buffer spring, and a pressing plate. The top surface of the support frame is equipped with an electric push rod, the bottom surface of the electric push rod is equipped with a support plate, the bottom surface of the support plate is equipped with a drilling motor, and the output end of the drilling motor is equipped with a drill bit. The support plate contains two sets of slide rods that are slidably connected to the support plate. A buffer spring is located on the outer side of the slide rod, and a pressing plate is located on the bottom surface of the slide rod. The electric push rod pushes the support plate downwards, causing the pressing plate to contact the plumbing pipe. During this downward movement, the slide rod slides on the support plate, compressing the buffer spring. The spring force of the buffer spring then pushes the pressing plate to press and fix the plumbing pipe. When the drilling motor drives the drill bit to rotate and drill through the plumbing pipe, the stability of the plumbing pipe is further maintained, ensuring the accuracy of the drilling.

[0014] The beneficial effects of this utility model are:

[0015] 1. Compared to traditional plumbing fixture punching devices, which are inconvenient for clamping and fixing pipes during use, making it difficult to adjust the pipe when punching at different locations, and prone to pipe misalignment during adjustment, resulting in errors in the punching position and affecting the accuracy of the punching, this device uses a limiting structure to clamp and limit one end of the pipe. The clamping components facilitate clamping and fixing the pipe, preventing it from shifting or sliding. The rotating structure allows for rotation and adjustment of the clamped pipe, thereby preventing pipe misalignment during adjustment and avoiding affecting the accuracy of the pipe punching.

[0016] 2. When the plumbing pipe is pushed into the device through the feed hole, the connecting support and elastic clamp are inserted into the inside of the plumbing pipe. The elastic force of the clamping spring pushes the elastic clamp to squeeze the inner wall of the plumbing pipe, clamping and connecting the plumbing pipe with the elastic clamp. By turning the knob, the clamping screw is rotated. The two sets of opposing threads on the clamping screw drive the two sets of sliding clamps to slide towards each other on the clamping screw, thereby clamping and fixing the placed plumbing pipe. The rotating motor drives the rotating disk to rotate, and the connecting support and elastic clamp drive the plumbing pipe to rotate. The clamping rollers not only clamp and fix the plumbing pipe, but also facilitate its rotation, thereby changing the angle of the plumbing pipe and facilitating punching at different positions of the plumbing pipe.

[0017] 3. Use an electric push rod to move the support plate downwards, bringing the pressing plate into contact with the plumbing pipe. During the downward movement, push the slide rod on the support plate to compress the buffer spring. The elastic force of the buffer spring then pushes the pressing plate to press and fix the plumbing pipe. When drilling holes in the plumbing pipe by rotating the drill bit driven by the drilling motor, further maintain the stability of the plumbing pipe and ensure the accuracy of the drilling. Use a sliding motor to drive the threaded rod to rotate, which in turn moves the support frame through the support slider, thereby changing the position of the drill bit and facilitating the adjustment of the drilling spacing. Attached Figure Description

[0018] Figure 1 The diagram shown is a three-dimensional structural schematic of a punching machine base assembly for the production of plumbing equipment according to this utility model.

[0019] Figure 2 The diagram shown is a three-dimensional structural schematic of a punching machine support component for the production of plumbing equipment according to this utility model.

[0020] Figure 3 The diagram shown is a three-dimensional structural diagram of the adjusting structure of a punching machine for producing plumbing equipment according to this utility model.

[0021] Figure 4The diagram shown is a three-dimensional structural schematic of a punching component for a punching machine used in the production of plumbing equipment according to this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Plumbing pipe; 201. Support base; 202. Collection hole; 203. Collection box; 301. Punching box; 302. Feed hole; 303. Support column; 304. Anti-slip pad; 4. Clamping screw; 41. Knob; 42. Sliding clamp; 43. Clamping roller; 5. Rotating motor; 51. Rotating disk; 52. Connecting support column; 53. Elastic clamping plate; 54. Clamping spring; 601. Sliding motor; 602. Threaded rod; 603. Support slider; 604. Support frame; 701. Electric push rod; 702. Support plate; 703. Drilling motor; 704. Drill bit; 705. Slide rod; 706. Buffer spring; 707. Pressing plate. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please see Figures 1-4This utility model provides an embodiment: a punching machine for producing plumbing fixtures, comprising a plumbing pipe 1, a base assembly, a support assembly, a clamping screw 4, a knob 41, a sliding clamping block 42, a clamping roller 43, a rotating motor 5, a rotating disk 51, a connecting support column 52, an elastic clamping plate 53, a clamping spring 54, a sliding assembly, and a drilling assembly; the base assembly is provided on the bottom surface of the plumbing pipe 1, and the support assembly is provided on the bottom surface of the base assembly; the clamping screw 4 is provided inside the base assembly, the knob 41 is provided on the side of the clamping screw 4, the sliding clamping block 42 is provided on the outside of the clamping screw 4, and the clamping roller 43 is provided inside the sliding clamping block 42; the rotating motor 5 is provided on the side of the support assembly, the rotating disk 51 is provided at the output end of the rotating motor 5, the connecting support column 52 is provided on the side of the rotating disk 51, the elastic clamping plate 53 is provided on the side of the rotating disk 51, the clamping spring 54 is provided on the side of the elastic clamping plate 53, and the sliding assembly is provided on the side of the support assembly. The top surface of the sliding assembly is equipped with a drilling assembly. The base assembly provides support for the plumbing pipe 1, and the support assembly provides stable support for the entire device. The knob 41 drives the clamping screw 4 to rotate, which in turn drives the clamping roller 43 on the sliding clamp 42 to clamp and fix the plumbing pipe 1. When the plumbing pipe 1 is pushed into the device, the connecting support 52 and the elastic clamp 53 are inserted into the interior of the plumbing pipe 1. The elastic force of the clamping spring 54 pushes the elastic clamp 53 to squeeze the inner wall of the plumbing pipe 1, thereby clamping and connecting the plumbing pipe 1 with the elastic clamp 53. The rotating motor 5 drives the rotating disk 51 to rotate, which in turn drives the plumbing pipe 1 to rotate and change the angle of the plumbing pipe 1, making it easier to punch holes at different positions of the plumbing pipe 1. The sliding assembly can drive the punching assembly to move, making it easy to adjust the punching spacing. The punching assembly is used to drill holes in the plumbing pipe 1.

[0025] Please see Figures 1-4In this embodiment, the base assembly includes a support base 201, a collection hole 202, and a collection box 203. The support base 201 is provided on the bottom surface of the plumbing pipe 1, and the top surface of the support base 201 has multiple sets of collection holes 202. The collection box 203 is provided inside the support base 201 and is slidably connected to the support base 201. The support base 201 provides support for the plumbing pipe 1, facilitating the handling of the plumbing pipe 1. The process involves clamping and punching the water pipe 1. Waste generated during punching falls into the collection box 203 through the collection hole 202 for collection. The support assembly includes a punching box 301, a feed hole 302, support columns 303, and an anti-slip pad 304. The bottom surface of the support base 201 is provided with the punching box 301, and the side of the punching box 301 has a feed hole 302. The bottom surface of the punching box 301 is provided with support columns 303, and six sets of support columns 303 are provided. The bottom surface of the device 3 is provided with an anti-slip pad 304. The feed hole 302 facilitates the placement of the plumbing pipe 1 to be processed into the punching box 301 for processing. The support column 303 provides support for the entire device. The anti-slip pad 304 prevents the device from shifting or sliding during operation. The support base 201 is provided with a clamping screw 4 inside. The clamping screw 4 is rotatably connected to the punching box 301. The other end of the clamping screw 4 is provided with a knob 41. There are two sets of sliding clamping blocks 42 and three sets of clamping rollers 43. The clamping rollers 43 are rotatably connected to the sliding clamping blocks 42. By rotating the knob 41, the clamping screw 4 is rotated. The two sets of opposing threads on the clamping screw 4 drive the two sets of sliding clamping blocks 42 to slide towards each other on the clamping screw 4, thereby clamping and fixing the placed plumbing pipe 1. The clamping rollers 43 can rotate the plumbing pipe 1 while clamping and fixing it, thus facilitating the punching of the pipe at different angles.

[0026] Please see Figures 1-4In this embodiment, a rotating motor 5 is provided on the side of the punching box 301, and four sets of elastic clamping plates 53 are provided. Two sets of clamping springs 54 are provided on the inner side of the elastic clamping plates 53. The clamping springs 54 are located on the outer side of the connecting support 52. When the plumbing pipe 1 is pushed into the device through the feed hole 302, the connecting support 52 and the elastic clamping plates 53 are inserted into the interior of the plumbing pipe 1, limiting its position. The elastic force of the clamping springs 54 pushes the elastic clamping plates 53 to squeeze the inner wall of the plumbing pipe 1, increasing the friction between the elastic clamping plates 53 and the plumbing pipe 1, thereby clamping and connecting the plumbing pipe 1 and the elastic clamping plates 53. A rotary motor 5 drives a rotating disk 51 to rotate, which in turn drives the plumbing pipe 1 to rotate via a connecting support column 52 and an elastic clamping plate 53. This changes the angle of the plumbing pipe 1, facilitating punching at different locations on the pipe. The sliding assembly includes a sliding motor 601, a threaded rod 602, a support slider 603, and a support frame 604. The sliding motor 601 is located on the side of the punching box 301, and the threaded rod 602 is located at the output end of the motor. The support slider 603 is located on the outer side of the threaded rod 602 and is situated on the side of the support base 201. The support frame 604 is located on the top surface of the support slider 603. The drive screw rod 602 rotates via the drive slider 603, which in turn moves the support frame 604, thereby changing the position of the drill bit 704 to facilitate adjustment of the drilling spacing. The drilling assembly includes an electric push rod 701, a support plate 702, a drilling motor 703, a drill bit 704, a slide rod 705, a buffer spring 706, and a pressing plate 707. The electric push rod 701 is mounted on the top surface of the support frame 604, the support plate 702 is mounted on the bottom surface of the electric push rod 701, the drilling motor 703 is mounted on the bottom surface of the support plate 702, the drill bit 704 is mounted on the output end of the drilling motor 703, and the slide rod 705 is mounted inside the support plate 702. Two sets of sliding rods 705 and support plates 702 are slidably connected. A buffer spring 706 is provided on the outer side of the sliding rod 705, and a pressing plate 707 is provided on the bottom surface of the sliding rod 705. The support plate 702 is pushed downward by the electric push rod 701, so that the pressing plate 707 contacts the water pipe 1. During the downward movement, the sliding rod 705 is pushed to slide on the support plate 702 to compress the buffer spring 706. The elastic force of the buffer spring 706 pushes the pressing plate 707 to squeeze the water pipe 1, pressing and fixing the water pipe 1. When the drill bit 704 is driven to rotate by the drilling motor 703 to drill the water pipe 1, the stability of the water pipe 1 is further maintained, ensuring the accuracy of the drilling.

[0027] During operation, the support base 201 provides support for the water pipe 1. When the water pipe 1 is pushed into the device through the feed hole 302, the connecting column 52 and the elastic clamp 53 are inserted into the interior of the water pipe 1 to limit the water pipe 1. The elastic force of the clamping spring 54 pushes the elastic clamp 53 to squeeze the inner wall of the water pipe 1. By increasing the friction between the elastic clamp 53 and the water pipe 1, the water pipe 1 and the elastic clamp 53 are clamped and connected.

[0028] By rotating the knob 41, the clamping screw 4 is rotated. The two sets of opposing threads on the clamping screw 4 drive the two sets of sliding clamping blocks 42 to slide towards each other on the clamping screw 4, thereby clamping and fixing the placed water heating pipe 1. The clamping roller 43 can clamp and fix the water heating pipe 1 while making it easy to rotate it, thus making it easy to punch holes at different angles of the pipe.

[0029] The electric push rod 701 pushes the support plate 702 downward, so that the pressing plate 707 contacts the water pipe 1. During the downward movement, the push rod 705 slides on the support plate 702 to compress the buffer spring 706. The elastic force of the buffer spring 706 pushes the pressing plate 707 to squeeze the water pipe 1, pressing and fixing the water pipe 1. When the drilling motor 703 drives the drill bit 704 to rotate and drill the water pipe 1, the stability of the water pipe 1 is further maintained to ensure the accuracy of the drilling.

[0030] The sliding motor 601 drives the threaded rod 602 to rotate, and the support slider 603 drives the support frame 604 to move, thereby changing the position of the drill bit 704 and making it easier to adjust the spacing of the drill holes.

[0031] The rotating disk 51 is driven to rotate by the rotating motor 5, and the water pipe 1 is rotated by the connecting support 52 and the elastic clamp 53, thereby changing the angle of the water pipe 1, which makes it easier to punch holes at different positions of the water pipe 1.

[0032] Through the above steps, the support assembly provides stable support for the entire device, and the base assembly provides support for the water pipe 1. When the water pipe 1 is pushed into the device, the connecting column 52 and the elastic clamp 53 are inserted into the interior of the water pipe 1. The elastic force of the clamping spring 54 pushes the elastic clamp 53 to squeeze the inner wall of the water pipe 1, thereby clamping and connecting the water pipe 1 with the elastic clamp 53. The knob 41 drives the clamping screw 4 to rotate, thereby driving the clamping roller 43 on the sliding clamp 42 to clamp and fix the water pipe 1. The sliding assembly drives the punching assembly to move, which facilitates the adjustment of the punching spacing. The punching assembly performs hole processing on the water pipe 1. The rotating motor 5 drives the rotating disk 51 to rotate, thereby driving the water pipe 1 to rotate and change the angle of the water pipe 1, which facilitates the punching processing at different positions of the water pipe 1.

[0033] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A punching machine for producing plumbing fixtures, comprising plumbing pipes (1); characterized in that: It also includes a base assembly, a support assembly, a clamping screw (4), a knob (41), a sliding clamp (42), a clamping roller (43), a rotating motor (5), a rotating disk (51), a connecting column (52), an elastic clamping plate (53), a clamping spring (54), a sliding assembly, and a drilling assembly; the bottom surface of the plumbing pipe (1) is provided with a base assembly, the bottom surface of the base assembly is provided with a support assembly, the inside of the base assembly is provided with a clamping screw (4), the side of the clamping screw (4) is provided with a knob (41), and the clamping screw ( 4) A sliding clamping block (42) is provided on the outside, and a clamping roller (43) is provided inside the sliding clamping block (42). A rotating motor (5) is provided on the side of the support component. A rotating disk (51) is provided at the output end of the rotating motor (5). A connecting support column (52) is provided on the side of the rotating disk (51). An elastic clamping plate (53) is provided on the side of the rotating disk (51). A clamping spring (54) is provided on the side of the elastic clamping plate (53). A sliding component is provided on the side of the support component. A drilling component is provided on the top surface of the sliding component.

2. The punching machine for producing plumbing equipment according to claim 1, characterized in that: The base assembly includes a support base (201), a collection hole (202), and a collection box (203); the bottom surface of the plumbing pipe (1) is provided with a support base (201), the top surface of the support base (201) is provided with a collection hole (202), multiple sets of collection holes (202) are provided, and the inner side of the support base (201) is provided with a collection box (203), which is slidably connected to the support base (201).

3. A punching machine for producing plumbing equipment according to claim 2, characterized in that: The support assembly includes a punch box (301), a feed hole (302), a support column (303), and an anti-slip pad (304); the bottom surface of the support base (201) is provided with a punch box (301), the side of the punch box (301) is provided with a feed hole (302), the bottom surface of the punch box (301) is provided with a support column (303), there are six sets of support columns (303), and the bottom surface of the support column (303) is provided with an anti-slip pad (304).

4. A punching machine for producing plumbing equipment according to claim 3, characterized in that: The support base (201) is equipped with a clamping screw (4) inside. The clamping screw (4) is rotatably connected to the punch box (301). The other end of the clamping screw (4) is equipped with a knob (41). There are two sets of sliding clamps (42) and three sets of clamping rollers (43). The clamping rollers (43) are rotatably connected to the sliding clamps (42).

5. A punching machine for producing plumbing equipment according to claim 3, characterized in that: A rotating motor (5) is provided on the side of the punching box (301), and four sets of elastic clamping plates (53) are provided. Clamping springs (54) are provided on the inner side of the elastic clamping plates (53), and two sets of clamping springs (54) are provided. The clamping springs (54) are located on the outer side of the connecting support (52).

6. A punching machine for producing plumbing equipment according to claim 5, characterized in that: The sliding assembly includes a sliding motor (601), a threaded rod (602), a support slider (603), and a support frame (604); the sliding motor (601) is provided on the side of the punch box (301), the output end of the sliding motor (601) is provided with a threaded rod (602), the outside of the threaded rod (602) is provided with a support slider (603), the support slider (603) is provided on the side of the support base (201), and the top surface of the support slider (603) is provided with a support frame (604).

7. A punching machine for producing plumbing equipment according to claim 6, characterized in that: The drilling assembly includes an electric push rod (701), a support plate (702), a drilling motor (703), a drill bit (704), a slide rod (705), a buffer spring (706), and a pressing plate (707). The top surface of the support frame (604) is provided with an electric push rod (701), the bottom surface of the electric push rod (701) is provided with a support plate (702), the bottom surface of the support plate (702) is provided with a drilling motor (703), the output end of the drilling motor (703) is provided with a drill bit (704), the inside of the support plate (702) is provided with a slide rod (705), there are two sets of slide rods (705), the slide rods (705) are slidably connected to the support plate (702), the outside of the slide rods (705) is provided with a buffer spring (706), and the bottom surface of the slide rods (705) is provided with a pressing plate (707).

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