Damper for magnetic rod

Abstract

The utility model discloses a damper for a magnetic rod and the magnetic rod. The damper comprises a first pipe body, a piston, an inner magnet and an outer magnet. The piston is arranged in the sealing cavity in a sliding mode, and sliding of the piston in the sealing cavity is affected by damping force. The inner magnet is arranged in the sealing cavity in a sliding mode and fixedly connected with the piston. The outer magnet is slidably arranged on the first pipe body in a sleeving mode and used for being fixedly connected with a magnetic coupling device of a magnetic rod, and the inner magnet and the outer magnet are in linkage through magnetic force. The piston can extrude air in front of the piston to generate air pressure difference or drive viscous liquid to flow in the sealing cavity, so that the resistance for moving the magnetic coupling device is increased, and the conditions that a magnetic rod collides with surrounding objects and samples fall off due to overexertion of an operator are avoided.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic rod technology, and specifically relates to a damper for magnetic rods. Background Technology

[0002] A magnetic rod is a device for transferring samples in a vacuum environment. The magnetic rod consists of a tube, a magnetic coupling device sleeved on the tube, and a magnetic rod inserted into the tube. When the operator moves the magnetic coupling device, the magnetic coupling device can drive the magnetic rod to extend and retract using magnetic coupling, thereby transferring the sample in a vacuum environment.

[0003] When moving the magnetic coupling device, the operator needs to apply external force to it. Operators with less experience cannot control the force, and often cause problems such as the magnetic rod hitting surrounding objects or the sample falling due to excessive force.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a damper for a magnetic rod, which solves the problem of excessive force causing the magnetic rod to collide with surrounding objects or samples to fall.

[0006] To achieve the above objectives, a specific embodiment of this utility model provides a damper for a magnetic rod, comprising a first tube, a piston, an inner magnet, and an outer magnet. The piston is slidably disposed within a sealed cavity, and its sliding within the sealed cavity is subject to a damping force. The inner magnet is slidably disposed within the sealed cavity and fixedly connected to the piston. The outer magnet is slidably sleeved on the first tube and used for fixed connection with a magnetic coupling device of the magnetic rod; the inner magnet and the outer magnet are linked by magnetic force.

[0007] In one or more embodiments of this utility model, the sealing cavity is filled with a viscous liquid, and the two parts of the sealing cavity located on both sides of the piston are connected in the direction of piston movement.

[0008] In one or more embodiments of this utility model, the peripheral wall of the piston is sealed to the inner wall of the first tube, and an axially extending through hole is provided on the piston.

[0009] In one or more embodiments of this utility model, the piston and the inner magnet are fixedly connected by bolts or colloids.

[0010] In one or more embodiments of this utility model, a guide rod is provided along its axial direction inside the first tube, and the piston and the inner magnet are slidably sleeved on the guide rod.

[0011] In one or more embodiments of this utility model, a regulating valve connected to the sealing cavity is provided on the first pipe body.

[0012] In one or more embodiments of this utility model, the regulating valve is disposed near the end of the first pipe body.

[0013] In another aspect, this invention provides a magnetic rod, comprising a second tube, a magnetic coupling device, a magnetic rod, and the aforementioned damper. The magnetic coupling device is slidably sleeved on the second tube, and the magnetic rod is at least partially slidably inserted into the second tube. The magnetic rod can slide controllably along the second tube under the drive of the magnetic coupling device. An outer magnet and the magnetic coupling device are fixedly connected.

[0014] In one or more embodiments of this utility model, a flange is fixedly connected to the first end of the first tube and the first end of the second tube, and a magnetic rod is inserted into the second tube from one side of the flange.

[0015] In one or more embodiments of this utility model, the second end of the first tube and the second end of the second tube are fixedly connected to the bracket.

[0016] Compared with the prior art, the piston of this invention can squeeze the gas in front of it to generate a pressure difference or drive the viscous liquid to flow in the sealed cavity, increasing the resistance of the moving magnetic coupling device and avoiding the situation where the magnetic rod collides with surrounding objects and the sample falls due to excessive force by the operator. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the damper used for the magnetic rod in Embodiment 1 of this utility model;

[0019] Figure 2 This is a cross-sectional view of the second tube in Embodiment 1 of this utility model;

[0020] Figure 3 This is a cross-sectional view of the second tube in Embodiment 2 of this utility model;

[0021] Figure 4 This is a cross-sectional view of the piston and inner magnet in Embodiment 2 of this utility model;

[0022] Figure 5This is a schematic diagram of the magnetic rod in Embodiment 3 of this utility model.

[0023] Explanation of main reference numerals in the attached drawings: 1. First tube body, 101. Sealing cavity, 2. Piston, 201. Perforation, 3. Inner magnet, 4. Outer magnet, 5. Guide rod, 6. Adjusting valve, 7. Second tube body, 8. Magnetic coupling device, 9. Magnetic rod, 10. Flange, 11. Support. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0025] Example 1:

[0026] Reference Figure 1 and Figure 2 As shown, this embodiment provides a damper for a magnetic rod, which is applied to a magnetic rod. The damper includes a first tube 1, a piston 2, an inner magnet 3, and an outer magnet 4. A sealed cavity 101 is provided inside the first tube 1. The piston 2 is slidably disposed within the sealed cavity 101, and the sliding of the piston 2 within the sealed cavity 101 is subject to a damping force. The inner magnet 3 is slidably disposed within the sealed cavity 101 and fixedly connected to the piston 2. The outer magnet 4 is slidably sleeved on the first tube 1 and is used for fixed connection with a magnetic coupling device 8 of the magnetic rod. The outer magnet 4 and the inner magnet 3 are linked by magnetic force.

[0027] In practical applications, when operators need to manipulate the magnetic rod to transfer samples in a vacuum environment, they apply a force to the magnetic coupling device 8 to drive it to move. The magnetic coupling device 8 drives the outer magnet 4 to slide along the first tube 1, and the outer magnet 4 drives the inner magnet 3 and piston 2 to slide inside the first tube 1. During the movement of piston 2, because the sealed cavity 101 is pre-filled with gas, piston 2 will compress the gas in front of it in the direction of movement, increasing the air pressure in front of it and decreasing the air pressure behind it. The air pressure difference on both sides of piston 2 generates resistance, thereby increasing the resistance to moving the magnetic coupling device 8. This prevents the operator from using excessive force, which could cause the magnetic rod to collide with surrounding objects and the sample to fall.

[0028] In this embodiment, the piston 2 and the inner magnet 3 are fixedly connected by bolts. The bolts can pass through the piston 2 from one side in a direction parallel to its axial direction and extend into the interior of the inner magnet 3. Alternatively, the bolts can pass through the inner magnet 3 from one side in a direction parallel to its axial direction and extend into the interior of the piston 2. Alternatively, the bolts can pass through both the piston 2 and the inner magnet 3 simultaneously along the axial direction of the piston 2.

[0029] In another embodiment, the piston 2 and the inner magnet 3 can be fixedly connected by an adhesive, which can be applied to the connection between the two.

[0030] Furthermore, a receiving groove for inserting the inner magnet 3 can be provided on the piston 2, and an adhesive can be applied to the receiving groove to enhance the connection strength between the piston 2 and the inner magnet 3. Alternatively, the receiving groove can also be provided on the inner magnet 3, with part of the piston 2 inserted into the receiving groove.

[0031] Reference Figure 2 As shown, in order to guide the piston 2 and the inner magnet 3 to move basically in a straight line and prevent the piston 2 and the inner magnet 3 from deflecting and getting stuck in the first tube 1, the first tube 1 in this embodiment is provided with a guide rod 5 arranged along its axial direction. The piston 2 and the inner magnet 3 are slidably sleeved on the guide rod 5 so as to guide the piston 2 and the inner magnet 3 to move linearly through the guide rod 5.

[0032] Reference Figure 1 As shown, in this embodiment, the first tube 1 is provided with a regulating valve 6 that communicates with the sealing cavity 101. The operator can adjust the air pressure in the sealing cavity 101 by adjusting the valve 6, thereby adjusting the resistance encountered by the piston 2 when it moves.

[0033] Specifically, when it is necessary to increase the resistance encountered by the piston 2 during its movement, the regulating valve 6 can be connected to an external air source to replenish the sealing cavity 101 with gas. Conversely, when it is necessary to reduce the resistance encountered by the piston 2 during its movement, some of the gas in the sealing cavity 101 can be discharged from the sealing cavity 101 by regulating the valve 6.

[0034] Furthermore, considering that the regulating valve 6 on the outer wall of the first tube 1 has a certain volume and protrudes from the outer wall of the first tube 1, in order to prevent the regulating valve 6 from obstructing the movement of the outer magnet 4, the regulating valve 6 is set at a position close to the end of the first tube 1 so as to avoid the outer magnet 4 during the movement of the outer magnet 4.

[0035] Example 2:

[0036] Reference Figure 3 and Figure 4As shown, this embodiment provides a damper for a magnetic rod. The structure of its first tube 1, inner magnet 3 and outer magnet 4 is the same as that of Embodiment 1. The difference is in the structure of the piston 2. The structure of the piston 2 is configured such that the two parts of the sealing cavity 101 located on both sides of the piston 2 can communicate in the axial direction of the piston 2.

[0037] Specifically, the sealing cavity 101 is filled with a viscous liquid, the peripheral wall of the piston 2 is sealed to the inner wall of the first tube 1, and an axially extending through hole 201 is provided on the piston 2. The two parts of the sealing cavity 101 located on both sides of the piston 2 are connected through the through hole 201.

[0038] When piston 2 moves, it causes viscous liquid to flow in the sealed cavity 101, generating resistance and increasing the resistance experienced by the moving magnetic coupling device 8. This prevents the magnetic rod from colliding with surrounding objects and samples from falling due to excessive force applied by the operator.

[0039] Furthermore, the piston 2 is provided with multiple through holes 201, which are evenly distributed around the axis of the piston 2.

[0040] Those skilled in the art will understand that the number and diameter of the through holes 201 have a significant impact on the resistance encountered by the piston 2 during movement. Generally, the fewer the number of through holes 201 and the smaller the diameter, the greater the resistance encountered by the piston 2 during movement; conversely, the more the number of through holes 201 and the larger the diameter, the smaller the resistance encountered by the piston 2 during movement. Therefore, in practical applications, the number and diameter of the through holes 201 can be set according to actual needs.

[0041] Additionally, it should be noted that when it is necessary to increase the resistance experienced by the moving piston 2, the regulating valve 6 can be connected to an external storage tank to replenish the viscous liquid in the storage tank into the sealing cavity 101. Conversely, when it is necessary to reduce the resistance experienced by the moving piston 2, some of the viscous liquid in the sealing cavity 101 can be discharged from the sealing cavity 101 by regulating valve 6.

[0042] Example 3:

[0043] Reference Figure 5 As shown, this embodiment provides a magnetic rod, which includes a second tube 7, a magnetic coupling device 8, a magnetic rod 9, and a damper as described in any of the above embodiments. The magnetic coupling device 8 is slidably sleeved on the second tube 7, and the magnetic rod 9 is at least partially slidably inserted into the second tube 7. The magnetic rod 9 can slide controllably along the second tube 7 under the drive of the magnetic coupling device 8. The outer magnet 4 and the magnetic coupling device 8 are fixedly connected.

[0044] In this embodiment, the outer magnet 4 and the magnetic coupling device 8 can be fixedly connected by bolts. The bolts can pass through the magnetic coupling device 8 from one side along a direction parallel to its axial direction and extend into the interior of the outer magnet 4. Alternatively, the bolts can also pass through the outer magnet 4 from one side along a direction parallel to its axial direction and extend into the interior of the magnetic coupling device 8. Alternatively, the bolts can simultaneously pass through both the magnetic coupling device 8 and the outer magnet 4 along their axial directions.

[0045] In another embodiment, the external magnet 4 and the magnetic coupling device 8 can also be fixedly connected by an adhesive, which can be applied to the connection between the two.

[0046] Reference Figure 1 As shown, in this embodiment, a flange 10 is fixedly connected to the first end of the second tube 7. The flange 10 is used to seal the internal space of the second tube 7, and the magnetic rod 9 is inserted into the second tube 7 from one side of the flange 10.

[0047] Furthermore, the first end of the first pipe body 1 is also connected to the flange 10 to fix the first pipe body 1.

[0048] Reference Figure 1 As shown, in this embodiment, the second end of the first tube 1 and the second end of the second tube 7 are fixedly connected to the bracket 11, and the bracket 11 supports and fixes the first tube 1 and the second tube 7.

[0049] Furthermore, the height of the bracket 11 is adjustable.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A damper for a magnetic rod, characterized in that, include: The first tube (1) has a sealed cavity (101) inside. The piston (2) is slidably disposed in the sealed cavity (101), and the sliding of the piston (2) in the sealed cavity (101) is subject to damping force; An inner magnet (3) is slidably disposed in the sealed cavity (101) and fixedly connected to the piston (2); An outer magnet (4) is slidably sleeved on the first tube (1) and used to be fixedly connected to the magnetic coupling device (8) of the magnetic rod. The outer magnet (4) and the inner magnet (3) are linked by magnetic force.

2. The damper for a magnetic rod according to claim 1, characterized in that, The sealed cavity (101) is filled with a viscous liquid, and the two parts of the sealed cavity (101) located on both sides of the piston (2) are connected in the direction of movement of the piston (2).

3. The damper for a magnetic rod according to claim 2, characterized in that, The peripheral wall of the piston (2) is sealed to the inner wall of the first tube (1), and an axially extending through hole (201) is provided on the piston (2).

4. The damper for a magnetic rod according to claim 1, characterized in that, The piston (2) and the inner magnet (3) are fixedly connected by bolts or glue.

5. The damper for a magnetic rod according to claim 1, characterized in that, The first tube (1) is provided with a guide rod (5) along its axial direction, and the piston (2) and the inner magnet (3) are slidably sleeved on the guide rod (5).

6. The damper for a magnetic rod according to claim 1, characterized in that, The first pipe body (1) is provided with a regulating valve (6) that communicates with the sealing cavity (101).

7. The damper for a magnetic rod according to claim 6, characterized in that, The regulating valve (6) is located near the end of the first pipe body (1).

8. A magnetic rod, characterized in that, include: second tube body (7); A magnetic coupling device (8) is slidably sleeved on the second tube body (7); A magnetic rod (9) is at least partially slidably inserted into the second tube (7), and the magnetic rod (9) can slide controllably along the second tube (7) under the drive of the magnetic coupling device (8); The damper as described in any one of claims 1 to 7, wherein the external magnet (4) and the magnetic coupling device (8) are fixedly connected.

9. The magnetic rod according to claim 8, characterized in that, A flange (10) is fixedly connected to the first end of the first tube (1) and the first end of the second tube (7), and the magnetic rod (9) is inserted into the second tube (7) from one side of the flange (10).

10. The magnetic rod according to claim 8, characterized in that, The second end of the first tube (1) and the second end of the second tube (7) are fixedly connected to the bracket (11).

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