A combined steel plate cold rolling stretching bending straightening machine

Abstract

The present invention relates to the technical field of steel plate straightening, and discloses a combined steel plate cold rolling stretching bending straightening machine, comprising a support frame, the top of the support frame is fixedly connected to a hydraulic box, the bottom of the support frame is fixedly connected to a support box, the top of the inner wall of the support box is rotatably connected to a support roller, and the bottom of the hydraulic box is fixedly connected to an extrusion device; the extrusion device comprises: an extrusion base, the extrusion base has a plate-like structure, and a hydraulic push rod arranged on the top of the extrusion base, the top of the extrusion base is fixedly connected to the bottom of the hydraulic push rod, and the bottom of the extrusion base is provided with an extrusion roller; a cleaning bracket, the cleaning bracket has a leg structure, and a cleaning brush arranged at the bottom of the cleaning bracket. The combined steel plate cold rolling stretching bending straightening machine can avoid the situation where the foreign matter that falls off has hard sharp corners and causes damage to the plate and the extrusion roller, and is convenient for protecting the surface of the plate and the surface of the extrusion roller.

Description

Technical Field

[0001] The invention relates to the technical field of steel plate straightening, in particular to a combined steel plate cold rolling stretching bending straightening machine. Background Art

[0002] A straightening machine is a device for straightening metal profiles, bars, pipes, wires, etc. The straightening machine squeezes bars and other materials through straightening rollers to change their straightness. Generally, there are two rows of straightening rollers, with varying numbers. There are also two-roller straightening machines, which rely on the angle change of two rollers (concave in the middle, hyperbolic rollers) to straighten materials of different diameters. The main types include pressure straightening machines, balanced roller straightening machines, shoe roller straightening machines, rotary reverse bending straightening machines, etc. The straightening machines currently used are usually unable to handle foreign matter on the surface of the plate during the process of straightening the bent plate, so that foreign matter on the surface of the plate is easy to damage the squeezing roller and the plate surface when squeezed. Summary of the invention

[0003] To achieve the above objectives, the present invention is implemented through the following technical solutions: a combined steel plate cold rolling stretch bending straightening machine, comprising a support frame, the top of the support frame is fixedly connected to a hydraulic box, the bottom of the support frame is fixedly connected to a support box, the top of the inner wall of the support box is rotatably connected to a support roller, and the bottom of the hydraulic box is fixedly connected to an extrusion device;

[0004] The extrusion device comprises:

[0005] An extrusion base, the extrusion base having a plate-like structure and a hydraulic push rod arranged on the top of the extrusion base, the top of the extrusion base is fixedly connected to the bottom of the hydraulic push rod, and an extrusion roller is arranged at the bottom of the extrusion base;

[0006] A cleaning bracket, which has a leg structure and a cleaning brush arranged at the bottom of the cleaning bracket, a driving shaft of a driving motor is fixedly connected to the side of the cleaning brush, the driving motor is fixedly connected to the cleaning bracket, and the cleaning bracket is fixedly connected to the bottom of the extrusion base through the leg structure.

[0007] A squeezing device is provided, and the plate enters between the supporting roller and the squeezing roller from one side of the supporting roller and the squeezing roller, and the plate is flattened by the squeezing force between the supporting roller and the squeezing roller. When the plate moves between the supporting roller and the squeezing roller, the driving motor drives the cleaning brush to rotate, and the surface of the plate can be cleaned by the cleaning brush, so that foreign matter that falls off in the process of the plate being flattened can be cleaned out by the cleaning brush, avoiding the situation where the hard sharp corners of the foreign matter that falls off cause damage to the plate and the squeezing roller, and facilitating the protection of the plate surface and the squeezing roller surface.

[0008] Preferably, the hydraulic push rods are provided in multiple groups and the tops are all fixedly connected to the bottom of the hydraulic box, and the support rollers and the squeezing rollers are provided in multiple groups and are staggeredly distributed.

[0009] Preferably, the cleaning brush is configured as a disc-shaped structure, and the cleaning bracket is provided in multiple groups and is evenly distributed between adjacent squeezing rollers.

[0010] Preferably, the squeezing roller comprises a rotating bracket, and the bottom of each two ends of the rotating bracket are provided with a chuck groove, the inner wall of the chuck groove is slidably connected with a rotating seat, the rotating part of the rotating seat is fixedly connected with a cross fixing head, and the top of the inner wall of the chuck groove is fixedly connected with an arc-shaped top block adapted to the rotating seat, and a roller body is arranged between the chuck grooves at both ends of the rotating bracket, and cross grooves are arranged at both ends of the roller body, and a squeezing roller is arranged. When the squeezing roller is damaged and needs to be replaced, the rotating bracket is directly pulled out from the chuck groove, and the rotating bracket drives the roller body to be moved out of the rotating bracket through the cross fixing head, and then the cross fixing head is pulled out from the cross groove and inserted into the cross groove on the new roller body, and then the rotating bracket is inserted into the chuck groove, and the new roller body can be driven into the rotating bracket through the rotating bracket. The maintenance and replacement of the squeezing roller are relatively convenient, and the roller body can be limited by the arc-shaped top block when squeezing the plate, so that each group of squeezing rollers can maintain the same height.

[0011] Preferably, the top of the rotating bracket is fixedly connected to the bottom of the support rod, and a friction pad is provided between the inner wall of the chuck groove and the rotating seat.

[0012] Preferably, the cleaning brush comprises a cleaning disc, the cleaning disc is fixedly connected with a brush head, the brush heads are arranged in multiple groups and are evenly distributed on the cleaning disc, a storage groove is provided on the side of the cleaning disc between adjacent brush heads, a telescopic push rod is slidably connected to the inner wall of the storage groove, the top of the telescopic push rod is fixedly connected to the top of the inner wall of the storage groove through a telescopic spring, one end of the telescopic push rod away from the telescopic spring extends to the outside of the storage groove and is fixedly connected with a scraper, a liquid storage cavity is provided inside the cleaning disc, the side of the liquid storage cavity is communicated with the storage groove, and the liquid storage cavity One side is connected with a liquid injection nozzle and is provided with a cleaning brush. When the cleaning brush rotates, it drives the brush head to clean the foreign matter detached from the surface of the plate, and drives the scraper to rotate at the same time. The scraper can be used to scrape the surface of the plate to clean the foreign matter closely adhering to the surface of the plate. The cleaning effect is good. A liquid storage chamber is provided. Hydraulic oil can be injected into the liquid storage chamber. The pressure of the hydraulic oil in the liquid storage chamber can push the telescopic push rod to move, thereby driving the scraper to move through the telescopic push rod. After the scraper is worn, the wear of the scraper can be compensated by the extension of the telescopic push rod, so that the full utilization of consumables is convenient.

[0013] Preferably, the side of the cleaning disc away from the liquid injection nozzle is fixedly connected to the driving shaft of the driving motor, and the side of the cleaning disc away from the driving motor is rotatably connected to the cleaning bracket through a rotating bolt.

[0014] Preferably, a sealing ring is sleeved and fixedly connected to one end of the telescopic push rod close to the telescopic spring, and the liquid storage cavity is filled with hydraulic oil.

[0015] Preferably, the scraper comprises a fixing portion and a hook portion, the top of the fixing portion is fixedly connected with an elastic soft plate, and the bottom side of the hook portion is fixedly connected with a scraper.

[0016] Preferably, one end of the elastic soft plate away from the fixed part is fixedly connected to the telescopic top rod, and the scraper blades are provided in multiple groups and are evenly distributed on the side of the hook part. A scraper is provided. When the bottom of the scraper blade contacts the surface of the plate, the surface of the plate generates an extrusion force on the scraper, pushing the elastic soft plate to gradually bend as the cleaning brush rotates. When the bottom of the scraper blade gradually moves away from the surface of the plate, the elastic soft plate gradually recovers, so that the scraper blade at the bottom of the scraper blade can contact the surface of the plate earlier and move away from the surface of the plate later during the movement, thereby increasing the scraping area of ​​the scraper blade, and the elastic force of the elastic soft plate can drive the scraper blade to stick to the surface of the plate, thereby improving the cleaning effect, and the elastic soft plate can also process the vibration and noise generated when the scraper blade acts on the surface of the plate.

[0017] The present invention provides a combined steel plate cold rolling stretching bending straightening machine. It has the following beneficial effects:

[0018] 1. A combined steel plate cold-rolled stretching bending straightening machine is provided with an extrusion device. The plate enters between the support roller and the extrusion roller from one side of the support roller and the extrusion roller, and the plate is flattened by the extrusion force between the support roller and the extrusion roller. When the plate moves between the support roller and the extrusion roller, the driving motor drives the cleaning brush to rotate, and the surface of the plate can be cleaned by the cleaning brush, so that foreign matter that falls off the plate in the process of being flattened from bending can be cleaned out by the cleaning brush, avoiding the situation where the hard sharp corners of the foreign matter that falls off cause damage to the plate and the extrusion roller, and conveniently protecting the surface of the plate and the surface of the extrusion roller.

[0019] 2. This combined steel plate cold-rolling stretching bending straightening machine is provided with an extrusion roller. When the extrusion roller is damaged and needs to be replaced, the rotating seat is directly pulled out from the chuck groove, and the rotating seat drives the roller body to move out from the rotating bracket through the cross fixing head. Then the cross fixing head is pulled out from the cross groove and inserted into the cross groove on the new roller body. Then the rotating seat is inserted into the chuck groove, and the new roller body can be driven into the rotating bracket through the rotating seat. The maintenance and replacement of the extrusion roller are relatively convenient, and when the roller body is extruding the plate, it can be limited by the arc-shaped top block so that each group of extrusion rollers can maintain the same height.

[0020] 3. This combined steel plate cold-rolled stretching bending straightening machine is provided with a cleaning brush. When the cleaning brush rotates, it drives the brush head to clean the foreign matter detached from the surface of the plate, and drives the scraper to rotate at the same time. The scraper can be used to scrape the surface of the plate to clean the foreign matter closely adhering to the surface of the plate. The cleaning effect is good. A liquid storage chamber is provided. Hydraulic oil can be injected into the liquid storage chamber. The pressure of the hydraulic oil in the liquid storage chamber can push the telescopic push rod to move, thereby driving the scraper to move through the telescopic push rod. After the scraper is worn, the wear of the scraper can be compensated by the extension of the telescopic push rod, so that the full utilization of consumables is convenient.

[0021] 4. This combined steel plate cold-rolled stretching bending and straightening machine is provided with a scraper. When the bottom of the scraper contacts the surface of the plate, the surface of the plate generates an extrusion force on the scraper, pushing the elastic soft plate to gradually bend as the cleaning brush rotates. When the bottom of the scraper gradually moves away from the surface of the plate, the elastic soft plate gradually recovers, so that the scraper at the bottom of the scraper can contact the surface of the plate earlier and move away from the surface of the plate later during the movement, thereby increasing the scraping area of ​​the scraper. The elastic force of the elastic soft plate can drive the scraper to stick to the surface of the plate, thereby improving the cleaning effect. The elastic soft plate can also process the vibration and noise generated when the scraper acts on the surface of the plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the extrusion device of the present invention;

[0025] Figure 4 This is a schematic diagram of the connection structure of the extrusion rollers of the present invention;

[0026] Figure 5 This is a schematic diagram of the disassembled structure of the squeezing roller of the present invention;

[0027] Figure 6 This is a schematic diagram of the connection structure of the cleaning brush of the present invention;

[0028] Figure 7 This is a schematic diagram of the internal structure of the cleaning brush of the present invention;

[0029] Figure 8 It is a schematic diagram of the scraper structure of the present invention.

[0030] In the figure: 1. support frame; 2. hydraulic box; 3. support box; 4. support roller; 5. extrusion device; 51. extrusion base; 52. hydraulic push rod; 54. extrusion roller; 541. rotating bracket; 542. chuck groove; 543. rotating seat; 544. cross fixing head; 545. arc top block; 546. roller body; 547. cross groove; 55. cleaning bracket; 56. cleaning brush; 561. cleaning disk; 562. brush head; 563. storage groove; 564. telescopic top rod; 565. scraper; 5651. fixing part; 5652. hook part; 566. liquid storage chamber; 567. liquid injection nozzle; 568. elastic soft plate; 569. scraper; 57. driving motor. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] See also Figure 1-Figure 3 The present invention provides a technical solution: a combined steel plate cold rolling stretch bending straightening machine, comprising a support frame 1, a hydraulic box 2 is fixedly connected to the top of the support frame 1, a support box 3 is fixedly connected to the bottom of the support frame 1, a support roller 4 is rotatably connected to the top of the inner wall of the support box 3, and an extrusion device 5 is fixedly connected to the bottom of the hydraulic box 2;

[0034] The extrusion device 5 comprises:

[0035] An extrusion base 51, which has a plate-like structure and a hydraulic push rod 52 disposed on the top of the extrusion base 51, the top of the extrusion base 51 is fixedly connected to the bottom of the hydraulic push rod 52, and an extrusion roller 54 is disposed at the bottom of the extrusion base 51;

[0036] The cleaning bracket 55 has a leg structure and a cleaning brush 56 arranged at the bottom of the cleaning bracket 55. The side of the cleaning brush 56 is fixedly connected to the driving shaft of the driving motor 57. The driving motor 57 is fixedly connected to the cleaning bracket 55. The cleaning bracket 55 is fixedly connected to the bottom of the extrusion base 51 through the leg structure.

[0037] There are multiple groups of hydraulic push rods 52 and the tops of the hydraulic push rods 52 are fixedly connected to the bottom of the hydraulic box 2. There are multiple groups of support rollers 4 and squeeze rollers 54 and they are staggered.

[0038] The cleaning brush 56 is configured as a disc-shaped structure, and the cleaning brackets 55 are configured in multiple groups and are evenly distributed between adjacent squeezing rollers 54 .

[0039] A squeezing device 51 is provided, and the plate enters between the supporting roller 4 and the squeezing roller 54 from one side of the supporting roller 4 and the squeezing roller 54, and the plate is flattened by the squeezing force between the supporting roller 4 and the squeezing roller 54. When the plate moves between the supporting roller 4 and the squeezing roller 54, the driving motor 57 drives the cleaning brush 56 to rotate, and the surface of the plate can be cleaned by the cleaning brush 56, so that foreign matter that falls off the plate in the process of being flattened from being bent can be cleaned out by the cleaning brush 56, avoiding the situation where the hard sharp corners of the foreign matter that falls off cause damage to the plate and the squeezing roller 54, and facilitating the protection of the surface of the plate and the surface of the squeezing roller 54.

[0040] Embodiment 2:

[0041] See also Figure 1-Figure 5 On the basis of the first embodiment, the present invention provides a technical solution: the squeezing roller 54 comprises a rotating bracket 541, the bottom of both ends of the rotating bracket 541 are provided with a chuck groove 542, the inner wall of the chuck groove 542 is slidably connected with a rotating seat 543, the rotating part of the rotating seat 543 is fixedly connected with a cross fixing head 544, the top of the inner wall of the chuck groove 542 is fixedly connected with an arc-shaped top block 545 adapted to the rotating seat 543, a roller body 546 is arranged between the chuck grooves 542 at both ends of the rotating bracket 541, and cross grooves 547 are arranged at both ends of the roller body 546, the top of the rotating bracket 541 is fixedly connected with the bottom of the support rod 53, a friction pad is arranged between the inner wall of the chuck groove 542 and the rotating seat 543, and the squeezing roller 54 is arranged. When the extrusion roller 54 is damaged and needs to be replaced, the rotating seat 543 is directly pulled out from the chuck groove 542, and the rotating seat 543 drives the roller body 546 to move out from the rotating bracket 541 through the cross fixing head 544, and then the cross fixing head 544 is pulled out from the cross groove 547 and inserted into the cross groove 547 on the new roller body 546, and then the rotating seat 543 is inserted into the chuck groove 542, and the new roller body 546 can be driven by the rotating seat 543 to enter the rotating bracket 541. The maintenance and replacement operations of the extrusion roller 54 are relatively convenient, and when the roller body 546 is extruding the plate, it can be limited by the arc-shaped top block 545, so that each group of extrusion rollers 54 can maintain the same height.

[0042] Embodiment three:

[0043] See also Figure 1-Figure 7On the basis of the first and second embodiments, the present invention provides a technical solution: the cleaning brush 56 comprises a cleaning disc 561, the cleaning disc 561 is fixedly connected with a brush head 562, the brush head 562 is provided with a plurality of groups and is evenly distributed on the cleaning disc 561, a side of the cleaning disc 561 between adjacent brush heads 562 is provided with a receiving groove 563, the inner wall of the receiving groove 563 is slidably connected with a telescopic push rod 564, the top of the telescopic push rod 564 is fixedly connected with the top of the inner wall of the receiving groove 563 through a telescopic spring, the end of the telescopic push rod 564 away from the telescopic spring extends to the outside of the receiving groove 563 and is fixedly connected with a scraper 565, a liquid storage chamber 566 is provided inside the cleaning disc 561, the side of the liquid storage chamber 566 is connected with the receiving groove 563, one side of the liquid storage chamber 566 is connected with a liquid injection nozzle 567, and the side of the cleaning disc 561 away from the liquid injection nozzle 567 is fixedly connected with the driving shaft of the driving motor 57, The cleaning disc 561 is rotatably connected to the cleaning bracket 55 at one side away from the driving motor 57 through a rotating bolt, and a sealing ring is sleeved and fixedly connected to one end of the telescopic push rod 564 close to the telescopic spring, and the liquid storage chamber 566 is filled with hydraulic oil, and a cleaning brush 56 is provided. When the cleaning brush 56 rotates, it drives the brush head 562 to clean the foreign matter detached from the surface of the plate, and at the same time drives the scraper 565 to rotate. The scraper 565 can be used to scrape the surface of the plate to clean the foreign matter that is closely adhered to the surface of the plate, and the cleaning effect is good. A liquid storage chamber 566 is provided, and hydraulic oil can be injected into the liquid storage chamber 566. The pressure of the hydraulic oil in the liquid storage chamber 566 pushes the telescopic push rod 564 to move, thereby driving the scraper 565 to move through the telescopic push rod 564. After the scraper 565 is worn, the wear of the scraper 565 can be compensated by the extension of the telescopic push rod 564, so that the consumables are fully utilized.

[0044] Embodiment 4:

[0045] See also Figure 1-Figure 8On the basis of the first, second and third embodiments, the present invention provides a technical solution: the scraper 565 includes a fixed portion 5651 and a hook portion 5652, the top of the fixed portion 5651 is fixedly connected with an elastic soft plate 568, the bottom side of the hook portion 5652 is fixedly connected with a scraper 569, the end of the elastic soft plate 568 away from the fixed portion 5651 is fixedly connected to the telescopic top rod 564, the scraper 569 is provided with multiple groups and evenly distributed on the side of the hook portion 5652, and the scraper 565 is provided. When the bottom of the scraper 565 contacts the surface of the plate, the surface of the plate generates a force on the scraper 565 The squeezing force pushes the elastic soft plate 568 to gradually bend as the cleaning brush 56 rotates. When the bottom of the scraper 565 gradually moves away from the surface of the plate, the elastic soft plate 568 gradually recovers, so that the scraper 569 at the bottom of the scraper 565 can contact the surface of the plate earlier and move away from the surface of the plate later during the movement, thereby increasing the scraping area of ​​the scraper 569. The elastic force of the elastic soft plate 568 can drive the scraper 569 to stick to the surface of the plate, thereby improving the cleaning effect. The elastic soft plate 568 can also process the vibration and noise generated when the scraper 565 acts on the surface of the plate.

[0046] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A combined steel plate cold rolling stretching bending straightening machine, Features: It comprises a support frame (1), the top of the support frame (1) is fixedly connected to a hydraulic box (2), the bottom of the support frame (1) is fixedly connected to a support box (3), the top of the inner wall of the support box (3) is rotatably connected to a support roller (4), and the bottom of the hydraulic box (2) is fixedly connected to an extrusion device (5); The extrusion device (5) comprises: An extrusion base (51), the extrusion base (51) having a plate-like structure, and a hydraulic push rod (52) arranged on the top of the extrusion base (51), the top of the extrusion base (51) being fixedly connected to the bottom of the hydraulic push rod (52), and an extrusion roller (54) being arranged on the bottom of the extrusion base (51); a cleaning bracket (55), the cleaning bracket (55) having a leg structure, and a cleaning brush (56) arranged at the bottom of the cleaning bracket (55), a driving shaft of a driving motor (57) being fixedly connected to a side of the cleaning brush (56), the driving motor (57) being fixedly connected to the cleaning bracket (55), and the cleaning bracket (55) being fixedly connected to the bottom of the extrusion base (51) via the leg structure; The cleaning brush (56) comprises a cleaning disk (561), the cleaning disk (561) being fixedly connected with a brush head (562), the brush heads (562) being provided in a plurality of groups and being evenly distributed on the cleaning disk (561), a portion of the side surface of the cleaning disk (561) located between adjacent brush heads (562) being provided with a storage groove (563), the inner wall of the storage groove (563) being slidably connected with a telescopic push rod (564), the top of the telescopic push rod (564) being fixedly connected with the top of the inner wall of the storage groove (563) via a telescopic spring, the end of the telescopic push rod (564) away from the telescopic spring extending to the outside of the storage groove (563) and being fixedly connected with a scraper (565), the cleaning disk (561) being provided with a liquid storage chamber (566), the side surface of the liquid storage chamber (566) being in communication with the storage groove (563), and one side of the liquid storage chamber (566) being in communication with a liquid injection nozzle (567); The scraper (565) comprises a fixing portion (5651) and a hook portion (5652); the top of the fixing portion (5651) is fixedly connected to an elastic soft plate (568); and the bottom side of the hook portion (5652) is fixedly connected to a scraper blade (569); One end of the elastic soft plate (568) away from the fixed portion (5651) is fixedly connected to the telescopic top rod (564), and a plurality of groups of scrapers (569) are provided and evenly distributed on the side of the hook portion (5652).

2. A combined steel plate cold rolling stretching bending straightening machine according to claim 1, Features: The hydraulic push rods (52) are provided in multiple groups and the tops are all fixedly connected to the bottom of the hydraulic box (2); the support rollers (4) and the squeezing rollers (54) are provided in multiple groups and are staggeredly distributed.

3. The combined steel plate cold rolling stretching bending straightening machine according to claim 1, Features: The cleaning brush (56) is configured as a disc-shaped structure, and the cleaning brackets (55) are provided in multiple groups and are evenly distributed between adjacent squeezing rollers (54).

4. The combined steel plate cold rolling stretching bending straightening machine according to claim 1, Features: The squeezing roller (54) comprises a rotating bracket (541), the bottoms of both ends of the rotating bracket (541) are provided with chuck grooves (542), the inner walls of the chuck grooves (542) are slidably connected to a rotating seat (543), the rotating portion of the rotating seat (543) is fixedly connected to a cross fixing head (544), the top of the inner wall of the chuck groove (542) is fixedly connected to an arc-shaped top block (545) matched with the rotating seat (543), a roller body (546) is arranged between the chuck grooves (542) at both ends of the rotating bracket (541), and both ends of the roller body (546) are provided with cross grooves (547).

5. A combined steel plate cold rolling stretching bending straightening machine according to claim 4, Features: The top of the rotating bracket (541) is fixedly connected to the bottom of the support rod (53), and a friction pad is provided between the inner wall of the chuck groove (542) and the rotating seat (543).

6. The combined steel plate cold rolling stretching bending straightening machine according to claim 1, Features: The side of the cleaning disk (561) away from the liquid injection nozzle (567) is fixedly connected to the drive shaft of the drive motor (57), and the side of the cleaning disk (561) away from the drive motor (57) is rotatably connected to the cleaning bracket (55) via a rotating bolt.

7. The combined steel plate cold rolling stretching bending straightening machine according to claim 1, Features: A sealing ring is sleeved and fixedly connected to one end of the telescopic push rod (564) close to the telescopic spring, and the liquid storage cavity (566) is filled with hydraulic oil.

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