Structure capable of externally adjusting damping parameters in damper

Abstract

The utility model discloses a structure capable of externally adjusting damping parameters in a damper, which comprises a piston in a hydraulic cylinder, a left oil cavity on the left side of the piston, a right oil cavity on the right side of the piston, a base at the left end of the left oil cavity, and a piston rod connected with the piston through the right oil cavity, the left end of the piston rod extends to one side of the left oil cavity through a through hole in the center of the piston, the adjusting piece is arranged on the periphery of the left end of the piston rod in a sleeving mode, an in-rod oil channel is formed in one section of the left end of the piston rod, a right end outlet of the in-rod oil channel is located on the right side of the piston and communicated with the right oil cavity, and a left end outlet of the in-rod oil channel is communicated with the left oil cavity. The adjusting piece can change the size of a left end outlet of the in-rod oil duct. The damper has the advantages that damping parameters can be adjusted by rotating the piston rod outside the damper, adjustment is convenient when the damper is produced and manufactured, timely adjustment in the application process is also facilitated, and the situation that the damper is maintained and replaced after obvious problems occur is avoided.

Description

Technical Field

[0001] The utility model relates to a structure capable of externally adjusting damping parameters in a damper, belonging to the technical field of oil pressure shock absorption equipment. Background Art

[0002] Existing pantograph dampers and similar products cannot externally adjust damping parameters.

[0003] During the manufacturing process, to adjust the parameters, the damper needs to be disassembled for adjustment. Sometimes, one or more adjustments are required to make the damping parameters of the product qualified.

[0004] During the use process, due to factors such as an increase in the number of operations, temperature changes, and pantograph deformation, the originally appropriate parameters begin to become inappropriate, but they cannot be adjusted externally in a timely manner, resulting in high product failure rates, short maintenance cycles, and the inability to keep the pantograph running in the best state all the time. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is: how to externally adjust the parameters of the pantograph damper without disassembly.

[0006] In view of the above problems, the technical solution proposed by the utility model is:

[0007] A structure capable of externally adjusting damping parameters in a damper, including a piston in a hydraulic cylinder, a left oil chamber on the left side of the piston, a right oil chamber on the right side of the piston, a base at the left end of the left oil chamber, a piston rod connected to the piston through the right oil chamber, the right end of the piston rod extending outwards from the right end of the hydraulic cylinder, the left end of the piston rod extending to one side of the left oil chamber through a through hole in the center of the piston, further including an adjusting member sleeved on the outer periphery of the left end of the piston rod, a rod inner oil passage provided in a section of the left end of the piston rod, the right end outlet of the rod inner oil passage communicating with the right side of the piston and communicating with the right oil chamber, the left end outlet of the rod inner oil passage capable of communicating with the left oil chamber, and when the piston rod rotates, the adjusting member can change the size of the left end outlet of the rod inner oil passage.

[0008] The left end of the adjusting member is a pipe body with a threaded hole, the left end of the piston rod has an external thread, the adjusting member is sleeved on the piston rod on the left side of the piston through the threaded hole, an annular oil groove with an opening radially inwards is provided on the inner wall of the threaded hole, an oil hole communicating the left oil chamber and the oil groove is provided on the pipe body, the left end outlet of the rod inner oil passage is overlapped and communicated with the oil groove, and when the piston rod rotates relative to the adjusting member, the overlapping amount of the left end outlet of the rod inner oil passage and the oil groove can be adjusted by the advance and retreat of the adjusting member on the piston rod.

[0009] A locking structure for preventing the adjusting member from rotating when the base and the adjusting member are in contact is provided between the base and the adjusting member.

[0010] The locking structure comprises a groove arranged on the base and a convex block arranged on the left end of the adjusting member and capable of being inserted into the groove. Both the groove and the convex block are far away from the axis of the piston rod.

[0011] A position control plate is arranged on the base, and the groove arranged on the base is a groove arranged on the position control plate.

[0012] There are two grooves, which are symmetrically arranged with the center of the control disk as the symmetry point, and there are two protrusions, which are symmetrically arranged with the axis of the piston rod as the symmetry line.

[0013] Furthermore, two symmetrically arranged protrusions have symmetrically arranged notches for inserting the knife-lifting rotation adjusting member. Beneficial Effects

[0014] 1. The damping parameters can be adjusted by rotating the piston rod outside the damper, which is not only convenient for adjustment during the production of the damper, but also convenient for timely adjustment during the application process, so that the damper does not need to be repaired or replaced after obvious problems occur;

[0015] 2. Simple structure and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional schematic diagram of the damper described in Example 1;

[0017] Figure 2 for Figure 1 A partial schematic diagram of

[0018] Figure 3 is a cross-sectional schematic diagram of the adjusting member;

[0019] Figure 4 is a schematic top view of the control panel;

[0020] Figure 5 It is a cross-sectional schematic diagram of the adjusting member described in the second embodiment.

[0021] In the figure: 1, hydraulic cylinder; 11, left oil chamber; 12, right oil chamber; 2, piston; 3, piston rod; 31, oil channel in rod; 311, left end outlet; 4, adjusting member; 41, tube body; 411, threaded hole; 412, oil groove; 413, oil hole; 42, bump; 421, missing groove; 5, base; 51, control plate; 511, groove. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings: Embodiment 1

[0023] like Figure 1As shown in FIG. 4 , a structure of a damper with externally adjustable damping parameters comprises a piston 2 in a hydraulic cylinder 1, a left oil chamber 11 on the left side of the piston 2, a right oil chamber 12 on the right side of the piston 2, a base 5 at the left end of the left oil chamber 11, a piston rod 3 connected to the piston 2 via the right oil chamber 12, and an adjusting member 4 sleeved on the outer periphery of the left end of the piston rod 3. The right end of the piston rod 3 extends outward from the right end of the hydraulic cylinder 1, and the left end of the piston rod 3 extends to the side of the left oil chamber 11 via the through hole in the center of the piston 2. An inner-rod oil passage 31 is provided in a section at the left end of the piston rod 3. The right end outlet of the inner-rod oil passage 31 is located on the right side of the piston 2 and communicates with the right oil chamber 12. The left end outlet 311 of the inner-rod oil passage 31 can be communicated with the left oil chamber 11. When the piston rod 3 is rotated, the adjusting member 4 can change the size of the left end outlet 311 of the inner-rod oil passage 31, thereby realizing the adjustment of the damping parameters. Since one end of the piston rod 3 is exposed outside the damper, the operation of rotating the piston rod 3 can be completed without disassembling the damper.

[0024] The left end of the adjusting member 4 is a tube body 41 with a threaded hole 411, and the left end of the piston rod 3 has an external thread. The adjusting member 4 is mounted on the piston rod 3 on the left side of the piston 2 through the threaded hole 411. An annular oil groove 412 with an opening radially inward is provided on the inner wall of the threaded hole 411. An oil hole 413 connecting the left oil chamber 11 and the oil groove 412 is provided on the tube body 41. The left end outlet 311 of the oil passage 31 in the rod is overlapped and connected with the oil groove 412. When the piston rod 3 rotates relative to the adjusting member 4, the overlap amount of the left end outlet 311 of the oil passage 31 in the rod and the oil groove 412 can be adjusted by advancing and retreating the adjusting member 4 on the piston rod 3, thereby controlling the amount of oil passing through the left end outlet 311 of the oil passage 31 in the rod to achieve adjustment of the damping parameters.

[0025] A locking structure is provided between the base 5 and the adjusting member 4 to prevent the adjusting member 4 from rotating when the two members are in contact.

[0026] Preferably, the locking structure includes a groove 511 provided on the base 5 and a protrusion 42 provided on the left end of the adjusting member 4 and capable of being inserted into the groove 511, and both the groove 511 and the protrusion 42 are away from the axis of the piston rod 3. In this way, after the piston rod 3 is pressed to the bottom and the protrusion 42 is inserted into the groove 511, when the piston rod 3 is rotated, the adjusting member 4 will not rotate with it, and the threaded hole 411 in the tube body 41 cooperates with the external thread of the piston rod 3, so that the adjusting member 4 can move forward or backward to the left or right on the piston rod 3, thereby changing the overlap amount between the left end outlet 311 and the oil groove 412.

[0027] A position control plate 51 is arranged on the base 5 , and the groove 511 arranged on the base 5 is a groove 511 arranged on the position control plate 51 .

[0028] There are two grooves 511, which are symmetrically arranged with the center of the control disk 51 as the symmetry point. There are two convex blocks 42, which are symmetrically arranged with the axis line of the piston rod 3 as the symmetry line, so that the torsional resistance received by the adjusting part 4 can be balanced. Embodiment 2

[0029] As Figure 5 described, the difference from Embodiment 1 is that there are symmetrically arranged notches 421 for inserting the knife-turning adjusting part 4 on the two symmetrically arranged convex blocks 42. In this way, when the adjusting part 4 is installed at the left end of the piston rod 3, it is convenient to rotate the adjusting part 4 with the aid of a knife tool.

[0030] The above embodiments are only used to describe the present invention more clearly, and cannot be regarded as limiting the protection scope covered by the present invention. Any modification in an equivalent form should be regarded as falling within the protection scope covered by the present invention.

Claims

1. A structure for externally adjusting damping parameters in a damper, comprising a piston (2) within a hydraulic cylinder (1), a left oil chamber (11) on the left side of the piston (2), a right oil chamber (12) on the right side of the piston (2), a base (5) at the left end of the left oil chamber (11), a piston rod (3) connected to the piston (2) via the right oil chamber (12), with the right end of the piston rod (3) extending outward from the right end of the hydraulic cylinder (1), and the left end of the piston rod (3) extending through a through hole in the center of the piston (2) to one side of the left oil chamber (11), characterized in that: It further includes an adjusting member (4) sleeved on the outer periphery of the left end of the piston rod (3). A rod inner oil passage (31) is provided in a section of the left end of the piston rod (3). The right end outlet of the rod inner oil passage (31) is located on the right side of the piston (2) and communicates with the right oil chamber (12). The left end outlet (311) of the rod inner oil passage (31) can communicate with the left oil chamber (11). When the piston rod (3) rotates, the adjusting member (4) can change the size of the left end outlet (311) of the rod inner oil passage (31).

2. The structure for externally adjusting damping parameters in the damper according to claim 1, wherein: The left end of the adjusting member (4) is a pipe body (41) having a threaded hole (411). The left end of the piston rod (3) has an external thread. The adjusting member (4) is sleeved on the piston rod (3) on the left side of the piston (2) through the threaded hole (411). An annular oil groove (412) with an opening radially inward is provided on the inner wall of the threaded hole (411). An oil hole (413) communicating the left oil chamber (11) and the oil groove (412) is provided on the pipe body (41). The left end outlet (311) of the rod inner oil passage (31) is in lap joint communication with the oil groove (412). When the piston rod (3) rotates relative to the adjusting member (4), the lap joint amount of the left end outlet (311) of the rod inner oil passage (31) and the oil groove (412) can be adjusted by the advance and retreat of the adjusting member (4) on the piston rod (3).

3. The structure for externally adjusting damping parameters in the damper according to claim 2, characterized in that: A locking structure is provided between the base (5) and the adjusting member (4) to prevent the adjusting member (4) from rotating when they are in contact.

4. The structure for externally adjusting damping parameters in the damper according to claim 3, characterized in that: The locking structure includes a groove (511) provided on the base (5) and a convex block (42) provided at the left end of the adjusting member (4) that can be inserted into the groove (511). Both the groove (511) and the convex block (42) are away from the axis line of the piston rod (3).

5. The structure for externally adjusting damping parameters in the damper according to claim 4, characterized in that: A position control disc (51) is provided on the base (5). The groove (511) provided on the base (5) is the groove (511) provided on the position control disc (51).

6. The structure for externally adjusting damping parameters in the damper according to claim 5, characterized in that: There are two grooves (511), which are symmetrically arranged with the center of the position control disc (51) as the symmetry point. There are two convex blocks (42), which are symmetrically arranged with the axis line of the piston rod (3) as the symmetry line.

7. The structure for externally adjusting damping parameters in the damper according to claim 4, characterized in that: Symmetrically arranged notches (421) for inserting a knife to rotate the adjusting member (4) are provided on the two symmetrically arranged convex blocks (42).

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