An overhauling device

Abstract

This utility model provides a maintenance device, including a flaw detector, a housing, and an adjustment assembly. The flaw detector includes a rod body with a probe at one end and a flange fixed at the second end, extending radially outward along the rod body. The housing has interconnected guide grooves and sliding grooves inside, with the rod body slidably connected to the guide grooves and the flange slidably connected to the sliding grooves. The adjustment assembly is located between the flange and the housing. The adjustment assembly is configured to adjust the position of the flange relative to the sliding grooves, allowing the probe to extend out of or retract into the housing. Taking the application of this maintenance device in wind power maintenance as an example, the maintenance device provided by this utility model, by setting the adjustment assembly, allows the probe to retract into the housing, preventing collisions between the probe and external objects during the maintenance personnel's climbing to the maintenance point, thus avoiding damage to the flaw detector and extending its lifespan.

Description

Technical Field

[0001] This utility model relates to the field of wind power maintenance technology, and more specifically, to a maintenance device. Background Technology

[0002] Wind turbine blades are generally quite tall, and after prolonged operation, metal gaps will form due to continuous rotation. During maintenance, manual inspection with a handheld flaw detector is required.

[0003] Existing wind power maintenance and inspection devices include a housing and a flaw detector. The flaw detector is inserted into the housing, and the probe of the flaw detector is exposed on the outside of the housing. When maintenance personnel carry the maintenance device to climb, the probe may collide with external objects, causing damage to the flaw detector. Utility Model Content

[0004] This invention provides a maintenance device to solve the technical problem in the prior art where the probe of a flaw detector is exposed on the outside of the housing, and the probe may collide with external objects, causing damage to the flaw detector.

[0005] This utility model provides a maintenance device, including:

[0006] A flaw detector includes a rod body, a probe at a first end of the rod body, and a flange fixed at a second end, the flange extending outward along the radial direction of the rod body;

[0007] A housing, the interior of which has interconnected guide grooves and sliding grooves, the rod body being slidably connected to the guide grooves, and the flange portion being slidably connected to the sliding grooves; and,

[0008] An adjustment assembly is disposed between the flange and the housing; the adjustment assembly is configured to adjust the position of the flange relative to the slide groove so that the probe extends out of the housing or retracts into the housing.

[0009] Optionally, the inner wall of the slide has a first slot, the first slot penetrating the housing and the axis of the first slot extending radially along the slide;

[0010] The flange portion is provided with a first connecting groove and a fixing groove. The axis of the first connecting groove extends radially along the flange portion and corresponds to the position of the first slot. The fixing groove is located in the middle of the flange portion and communicates with the first connecting groove.

[0011] The adjustment assembly includes a limiting pin, a first spring, and a connecting block. The limiting pin is slidably connected to the first connecting groove, and its end can extend out of the first connecting groove and into the slot. The connecting block is disposed in the fixing groove. The first spring is sleeved on the limiting pin and located between the inner wall of the fixing groove and the connecting block. The first spring is configured to always drive the limiting pin to extend out of the first connecting groove and into the first slot, so that the probe extends out of the housing.

[0012] Optionally, the slide has an adjusting groove, the length direction of which extends along the axis of the slide;

[0013] The adjustment assembly includes an adjustment rod disposed on the flange portion and extending radially outward along the flange portion, the first end of the adjustment rod being slidably connected to the adjustment groove; the adjustment rod is configured to adjust the position of the flange portion relative to the groove.

[0014] Optionally, the flange portion is provided with a second connecting groove, the axis of the second connecting groove extending radially along the flange portion, being set at a preset angle with the first connecting groove and communicating with the fixing groove; the adjusting rod is slidably connected to the second connecting groove;

[0015] The adjustment assembly further includes a first wedge block and a second spring. The first plane of the first wedge block is fixed to the second end of the adjustment rod, and the plane containing the inclined surface of the first wedge block intersects the adjustment rod. The second spring is disposed opposite to the adjustment rod and is located between the second plane of the first wedge block and the fixing groove.

[0016] The connecting block is a second wedge block, the inclined surface of the second wedge block is engaged with the inclined surface of the first wedge block, and the inclined surface of the second wedge block is located at the end away from the limiting pin.

[0017] Optionally, the first connecting groove has at least two and is spaced apart circumferentially along the flange, and the first wedge has at least two inclined surfaces;

[0018] The second wedge has at least two components, and the inclined surface of the second wedge is engaged with the inclined surface of the first wedge; the limiting pin has at least two components, which are respectively fixed to the second wedge and respectively slidably connected to the first connecting groove.

[0019] Optionally, an adjusting block is fixed to the first end of the adjusting rod.

[0020] Optionally, the housing is provided with straps along its circumference for securing the housing to the operator's arm.

[0021] Optionally, the straps are at least two in number and are spaced apart along the length of the rod body;

[0022] And / or, the ends of the strap are provided with Velcro; or, the ends of the strap are provided with a buckle structure.

[0023] Taking the application of this maintenance device to wind power maintenance as an example, the maintenance device provided by this utility model has at least the following beneficial technical effects:

[0024] By incorporating an adjustment mechanism, the probe can be retracted into the housing, preventing collisions between the probe and external objects during the maintenance process when personnel carry the device to the maintenance point, thus extending the lifespan of the flaw detector. In addition, guide grooves and slides are provided to guide the movement of the rod body and flange, respectively. Attached Figure Description

[0025] Figure 1 An exploded structural diagram of a maintenance device provided for an embodiment of this utility model;

[0026] Figure 2 A cross-sectional view of a maintenance device provided in an embodiment of this utility model;

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Housing; 101. Guide groove; 102. Slide groove; 103. First slot; 104. Second slot; 105. Adjustment groove; 20. Flaw detector; 201. Rod body; 202. Probe; 30. Flange; 301. First connecting groove; 302. Fixing groove; 303. Second connecting groove; 401. Limiting pin; 402. First spring; 403. Adjusting rod; 404. First wedge block; 405. Second spring; 406. Second wedge block; 407. Adjusting block; 50. Strap. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the following description is provided in conjunction with the appendix. Figure 1-2 Specific embodiments of this utility model will be described in detail.

[0030] In this utility model, the terms "connection" and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure.

[0031] In this utility model, the terms "inner", "outer", "left", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] This utility model embodiment provides a maintenance device; please refer to the appendix. Figure 1 The inspection device includes a flaw detector 20, a housing 10, and an adjustment assembly. The flaw detector 20 includes a rod body 201, a probe 202 at one end, and a flange 30 fixed at the second end, extending radially outward along the rod body 201. The housing 10 has a guide groove 101 and a sliding groove 102 communicating with each other. The rod body 201 is slidably connected to the guide groove 101, and the flange 30 is slidably connected to the sliding groove 102. The adjustment assembly is located between the flange 30 and the housing 10. The adjustment assembly is configured to adjust the position of the flange 30 relative to the sliding groove 102, so that the probe 202 extends out of or retracts into the housing 10. For example, as... Figure 1 As shown, the rod body 201 can be slidably connected to the guide groove 101 along the OX direction, and the flange portion 30 can be slidably connected to the slide groove 102 along the OX direction.

[0033] Taking the application of this inspection device to wind power maintenance as an example, the inspection device provided in this embodiment of the utility model, by setting an adjustment component, allows the probe 202 to retract into the housing 10, avoiding the phenomenon that the probe 202 collides with external objects during the process of maintenance personnel carrying the inspection device to the maintenance point, which would cause damage to the flaw detector 20, thereby extending the life of the flaw detector 20; in addition, a guide groove 101 and a sliding groove 102 are provided to guide the movement of the rod body 201 and the flange, respectively.

[0034] In one embodiment of this utility model, please refer to the appendix. Figure 1 and Figure 2 The inner wall of the slide groove 102 has a first slot 103, which penetrates the housing 10 and the axis of the first slot 103 extends radially along the slide groove 102; the flange portion 30 is provided with a first connecting groove 301 and a fixing groove 302, the axis of the first connecting groove 301 extends radially along the flange portion 30 and corresponds to the position of the first slot 103; the fixing groove 302 is located in the middle of the flange portion 30 and communicates with the first connecting groove 301;

[0035] The adjustment assembly may include a limiting pin 401, a first spring 402, and a connecting block. The limiting pin 401 is slidably connected to the first connecting groove 301, and its end can extend out of the first connecting groove 301 and into the first slot 103. The connecting block is movably connected to the fixing groove 302. The first spring 402 is sleeved on the limiting pin 401 and located between the inner wall of the fixing groove 302 and the connecting block. The first spring 402 is configured to always drive the limiting pin 401 to extend out of the first connecting groove 301 and into the first slot 103, so that the probe 202 extends out of the housing 10. This configuration locks the position of the flange 30 when the probe 202 extends out of the housing 10, improving the stability of the flaw detector 20 during operation.

[0036] In this embodiment of the utility model, please refer to the appendix. Figure 1 and Figure 2 The slide 102 has an adjusting groove 105, the length direction of which extends along the axis of the slide 102; for example, as Figure 1 As shown, the axis of the slide 102 is Figure 1 The OX direction is shown in the diagram. The adjustment assembly includes an adjustment rod 403, which is disposed on the flange 30 and extends radially outward along the flange 30. The first end of the adjustment rod 403 is slidably connected to the adjustment groove 105. The adjustment rod 403 is configured to adjust the position of the flange 30 relative to the groove 102. This configuration allows the adjustment rod 403 to be slidably connected to the adjustment groove 105, facilitating maintenance personnel to adjust the position of the flange 30 relative to the groove 102, i.e., facilitating the adjustment of the position of the probe 202 relative to the housing 10, so as to extend or retract the probe 202 from the housing 10.

[0037] In this embodiment of the utility model, please refer to the appendix. Figure 2 The flange portion 30 is provided with a second connecting groove 303. The axis of the second connecting groove 303 extends radially along the flange portion 30, is set at a preset angle with the first connecting groove 301, and communicates with the fixing groove 302; for example, Figure 2 As shown, the angle between the axis of the second connecting groove 303 and the axis of the first connecting groove 301 is 90°, wherein the axis of the second connecting groove 303 is... Figure 2 In the OZ direction shown, the axis of the first connecting groove 301 is... Figure 2The OY direction is shown; the adjusting rod 403 is slidably connected to the second connecting groove 303; the adjusting assembly also includes a first wedge block 404 and a second spring 405, the first plane of the first wedge block 404 is fixed to the second end of the adjusting rod 403, and the plane of the inclined surface of the first wedge block 404 intersects the adjusting rod 403; the second spring 405 is disposed opposite to the adjusting rod 403 and is located between the second plane of the first wedge block 404 and the fixing groove 302; the connecting block is a second wedge block 406, the inclined surface of the second wedge block 406 is engaged with the inclined surface of the first wedge block 404, and the inclined surface of the second wedge block 406 is located at the end away from the limiting pin 401.

[0038] The working principle of the maintenance device provided in this embodiment of the utility model is as follows: If the limiting pin 401 is inserted into the first slot 103, the probe 202 extends out of the housing 10. At this time, the first spring 402 is compressed and stores elastic potential energy. After the maintenance work is completed, the probe 202 needs to be retracted into the housing 10. First, along the radial inward direction of the flange 30 (i.e., along...) Figure 2 A force is applied to the adjusting rod 403 (in the OZ direction shown). The adjusting rod 403 slides along the second connecting groove 303, driving the first wedge block 404 to move and compressing the second spring 405. The second spring 405 stores elastic potential energy. Under the combined action of the inclined surfaces of the first wedge block 404 and the second wedge block 406, the second spring 405 releases its elastic potential energy. The second wedge block 406 moves radially inward along the flange portion 30 (i.e., Figure 2 The second wedge-shaped block 406 located on the left side of the middle Figure 2 The movement (in the OY direction) causes the limiting pin 401 to slide along the first connecting groove 301, so that the end of the limiting pin 401 disengages from the first slot 103, that is, the fixed connection between the flange 30 and the housing 10 is released; then, along the axis parallel to the slide groove 102 and away from the guide groove 101 (i.e., along...) Figure 1 A force is applied to the adjusting rod 403 (in the OX direction shown), causing the adjusting rod 403 to slide along the adjusting groove 105 and drive the flange 30 to slide along the sliding groove 102. The probe 202 gradually retracts into the housing 10. During this process, the second spring 405 releases its elastic potential energy, driving the first wedge block 404 to reset, i.e., along the OX direction. Figure 2 The movement is in the opposite direction of the OZ direction shown, with the second wedge block 406 moving radially outward along the flange (i.e., Figure 2 The second wedge-shaped block 406 located on the left side of the middle Figure 2The movement (in the opposite direction of the OY direction) causes the first spring 402 to be compressed and store elastic potential energy, while the end of the limiting pin 401 abuts against the inner wall of the slide groove 102. It should be noted that the elastic force of the second spring 405 is greater than that of the first spring 402. With this configuration, by controlling the adjusting rod 403 to slide along the second connecting groove 303, and through the cooperation of the inclined surfaces of the first wedge block 404 and the second wedge block 406, as well as the action of the first spring 402, the end of the limiting pin 401 disengages from the first slot 103, thus releasing the fixed connection between the flange 30 and the housing 10. By controlling the adjusting rod 403 to slide along the adjusting groove 105, the probe 202 retracts into the housing 10, thereby protecting the probe 202 and preventing collision damage during non-operational times.

[0039] In this embodiment of the utility model, see appendix. Figure 1 The inner wall of the slide groove 102 also has a second slot 104, which penetrates the housing 10 and whose axis extends radially along the slide groove 102. Compared to the second slot 104, the first slot 103 is closer to the guide groove 101. The second slot 104 is configured such that if the limiting pin 401 extends into the second slot 104, the probe 202 will retract into the housing 10. This configuration locks the position of the flange 30 when the probe 202 is retracted into the housing 10, preventing accidental extension and damage to the probe 202.

[0040] The working principle of the maintenance device provided in this embodiment of the utility model is as follows:

[0041] If the limiting pin 401 is inserted into the second slot 104, the first spring 402 is compressed and stores elastic potential energy, and the probe 202 retracts into the housing 10. When the probe 202 of the flaw detector 20 needs to extend out of the housing 10, firstly, along the radially inward direction of the flange portion 30 (i.e., along...) Figure 2 A force is applied to the adjusting rod 403 (in the OZ direction shown), causing the adjusting rod 403 to slide along the second connecting groove 303. This drives the first wedge block 404 to move and compress the second spring 405. The second spring 405 stores elastic potential energy. Under the combined action of the inclined surfaces of the first wedge block 404 and the second wedge block 406, the second spring 405 releases its elastic potential energy, and the second wedge block 406 moves radially inward along the flange portion 30 (i.e., for example, ...). Figure 2 The second wedge-shaped block 406 located on the left side of the middle Figure 2 The movement (in the OY direction as shown) causes the limiting pin 401 to slide along the first connecting groove 301, so that the end of the limiting pin 401 disengages from the second slot 104, that is, the fixed connection between the flange 30 and the housing 10 is released; then, a force is applied to the adjusting rod 403 in a direction parallel to the axis of the slide groove 102 and close to the guide groove 101 (i.e., along the OY direction movement), causing the limiting pin 401 to slide along the first connecting groove 301, so that the end of the limiting pin 401 disengages from the second slot 104, that is, the fixed connection between the flange 30 and the housing 10 is released; then, a force is applied to the adjusting rod 403 in a direction parallel to the axis of the slide groove 102 and close to the guide groove 101 (that is, along the OY direction movement), causing the limiting pin 401 to slide Figure 1(in the opposite direction of the OX direction shown), the adjusting rod 403 slides along the adjusting groove 105 and drives the flange 30 to slide along the sliding groove 102. The probe 202 gradually extends out of the housing 10. During this process, the second spring 405 releases elastic potential energy, driving the first wedge block 404 to reset, that is, along the... Figure 2 The second wedge block 406 moves in the opposite direction to the OZ direction shown, and moves radially outward along the flange (i.e., for example, Figure 2 The second wedge-shaped block 406 located on the left side of the middle Figure 2 (As shown in the OY direction movement), the first spring 402 is compressed to store elastic potential energy, and the end of the limiting pin 401 abuts against the inner wall surface of the slide groove 102, causing the flange 30 to slide along the slide groove 102. When the limiting pin 401 moves to the position of the first slot 103, the first spring 402 releases elastic potential energy to drive the limiting pin 401 to insert into the first slot 103, and the probe 202 extends out of the housing 10 and locks in position.

[0042] Similarly, if the limiting pin 401 is inserted into the first slot 103, the first spring 402 is compressed and stores elastic potential energy. The probe 202 extends out of the housing 10. After the maintenance work is completed, the probe 202 needs to be retracted into the housing 10. First, along the radial inward direction of the flange 30 (i.e., along...) Figure 2 A force is applied to the adjusting rod 403 (in the OZ direction shown), causing the adjusting rod 403 to slide along the second connecting groove 303. This drives the first wedge block 404 to move and compress the second spring 405. The second spring 405 stores elastic potential energy. Under the combined action of the inclined surfaces of the first wedge block 404 and the second wedge block 406, the second spring 405 releases its elastic potential energy, and the second wedge block 406 moves radially inward along the flange portion 30 (i.e., for example, ...). Figure 2 The second wedge-shaped block 406 located on the left side of the middle Figure 2 (As shown, the movement in the OY direction) causes the limiting pin 401 to slide along the first connecting groove 301, so that the end of the limiting pin 401 disengages from the first slot 103, that is, the fixed connection between the flange 30 and the housing 10 is released; then, along the axis parallel to the slide groove 102 and away from the guide groove 101 (i.e., along...) Figure 1 A force is applied to the adjusting rod 403 (in the OX direction shown), causing the flange 30 to slide along the slide groove 102. The probe 202 gradually retracts into the housing 10. During this process, the second spring 405 releases its elastic potential energy, driving the first wedge block 404 to reset, i.e., along... Figure 2 The second wedge block 406 moves in the opposite direction to the OZ direction shown, and moves radially outward along the flange (i.e., for example, Figure 2 The second wedge-shaped block 406 located on the left side of the middle Figure 2(As shown in the OY direction movement), the first spring 402 is compressed to store elastic potential energy, and the end of the limiting pin 401 abuts against the inner wall of the slide groove 102, causing the flange 30 to slide along the slide groove 102. When the limiting pin 401 moves to the position of the second slot 104, the first spring 402 releases elastic potential energy to drive the limiting pin 401 to insert into the second slot 104, and the probe 202 retracts into the housing 10 and locks in position.

[0043] In this embodiment of the present invention, the first connecting groove 301 has at least two, that is, the first connecting groove 301 can be two, three, or other numbers; the first wedge block 404 has at least two inclined surfaces and is arranged circumferentially at intervals, that is, the inclined surfaces of the first wedge block 404 can be two, three, or other numbers; the second wedge block 406 has at least two and is located on opposite sides of the first wedge block 404, that is, the second wedge block 406 can be two, three, or other numbers, the number of inclined surfaces of the second wedge block 406 matches the number of inclined surfaces of the first wedge block 404, and the inclined surfaces of the second wedge block 406 cooperate with the inclined surfaces of the first wedge block 404; the limiting pin 401 has at least two, that is, the limiting pin 401 can be two, three, or other numbers, respectively fixed to the second wedge block 406 and respectively slidably connected to the first connecting groove 301. For example, as Figure 2 As shown, there are two first connecting grooves 301 arranged opposite to each other; the first wedge block 404 is an isosceles trapezoidal wedge block with two inclined surfaces; there are two second wedge blocks 406 located on opposite sides of the isosceles trapezoidal wedge block, with the inclined surfaces of the second wedge blocks 406 fitting into the inclined surfaces of the isosceles trapezoidal wedge blocks; there are two limiting pins 401, which are fixed to the second wedge blocks 406 and slidably connected to the first connecting grooves 301. This arrangement improves the stability of the connection between the flange portion 30 and the housing 10.

[0044] In this embodiment of the present invention, each limiting pin 401 is provided with a first slot 103 and a second slot 104. The first pin and the second slot 104 both penetrate the housing 10 and the axis of the second slot 104 extends radially along the slide groove 102. Compared with the second slot 104, the first slot 103 is closer to the guide groove 101.

[0045] In this embodiment of the utility model, please refer to the appendix. Figure 1 and Figure 2 An adjusting block 407 is fixedly installed at the first end of the adjusting rod 403. This arrangement facilitates operation by maintenance personnel.

[0046] In this embodiment of the invention, in addition to the structure of the limiting pin 401, the first spring 402, and the connecting block as described in one of the above embodiments, the adjusting component can also adopt a threaded connection structure or a spring snap-fit ​​structure. For example, the adjusting component includes a threaded hole and a threaded portion. The threaded hole is located on the inner wall surface of the slide groove 102 and penetrates the end of the housing 10 away from the guide groove 101. The threaded portion is located on the outer peripheral surface of the flange portion 30 and is threadedly connected to the threaded hole. With this configuration, by rotating the flange portion 30, the position of the flange portion 30 relative to the slide groove 102 can be adjusted so that the probe 202 extends out of or retracts into the housing 10. For example, the slide 102 has an adjustment groove 105 and a locking groove. The length direction of the adjustment groove 105 extends along the axis of the slide 102. The locking groove communicates with the adjustment groove 105 and protrudes from the side wall of the adjustment groove 105, i.e., the adjustment groove 105 and the locking groove are L-shaped. The adjustment assembly includes an adjustment rod 403 and a spring. The adjustment rod 403 is fixed to the flange 30 and extends radially outward along the flange 30. The adjustment rod 403 can be slidably connected to the adjustment groove 105 and can be locked into the locking groove. The spring is sleeved on the rod body 201 and located between the flange 30 and the stepped end face of the guide groove 101 and the slide 102. The spring is configured such that if the adjustment rod 403 disengages from the locking groove, the spring always has the ability to drive the adjustment rod 403 to move away from the guide groove 101, so that the probe 202 retracts into the housing 10. In addition, other adjustment structures in the prior art can be used, as long as they can achieve the adjustment and locking of the position of the flange 30 relative to the slide 102.

[0047] In this embodiment of the utility model, please refer to the appendix. Figure 2 The housing 10 is provided with straps 50 along its circumference, which are used to fix the housing 10 to the operator's arm.

[0048] In this embodiment of the invention, at least two straps 50 are provided at intervals along the length of the rod body 201. This arrangement enhances the stability of the housing 10 fixed to the arm and prevents the maintenance device from accidentally falling and being damaged.

[0049] In this embodiment of the invention, the end of the strap 50 may be provided with Velcro; or, the end of the strap 50 may be provided with a buckle structure. This arrangement facilitates the fixing of the strap 50.

[0050] In this embodiment of the utility model, the shell 10 is a split structure, including a first half-shell and a second half-shell that are connected to each other.

[0051] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A maintenance device, characterized in that, include: The flaw detector (20) includes a rod body (201), a probe (202) at a first end of the rod body (201), and a flange (30) fixed at a second end. The flange (30) extends radially outward along the rod body (201). The flange (30) is provided with a first connecting groove (301) and a fixing groove (302). The axis of the first connecting groove (301) extends radially along the flange (30), and the fixing groove (302) is located in the middle of the flange (30) and communicates with the first connecting groove (301). The housing (10) has an internally connected guide groove (101) and slide groove (102). The rod body (201) is slidably connected to the guide groove (101), and the flange (30) is slidably connected to the slide groove (102). The inner wall of the slide groove (102) has a first slot (103) that penetrates the housing (10) and whose axis extends radially along the slide groove (102). The first connecting groove (301) corresponds to the position of the first slot (103). The slide groove (102) has an adjusting groove (105) whose length extends along the axis of the slide groove (102). as well as, An adjustment assembly is disposed between the flange portion (30) and the housing (10); the adjustment assembly includes a limiting pin (401), a first spring (402), a connecting block, and an adjustment rod (403); the limiting pin (401) is slidably connected to the first connecting groove (301); the connecting block is movably connected to the fixing groove (302); the first spring (402) is sleeved on the limiting pin (401) and located between the inner wall surface of the fixing groove (302) and the connecting block; the adjustment rod (403) is disposed on the flange portion (30) and extends outward along the radial direction of the flange portion (30); the first end of the adjustment rod (403) can be slidably connected to the adjustment groove (105). The first spring (402) is configured to always drive the limiting pin (401) to extend out of the first connecting groove (301) and into the first slot (103) so that the probe (202) extends out of the housing (10); The adjusting rod (403) is configured to adjust the position of the flange (30) relative to the slide (102) so that the probe (202) extends out of the housing (10) or retracts into the housing (10).

2. The maintenance device according to claim 1, characterized in that, The flange portion (30) is provided with a second connecting groove (303), the axis of the second connecting groove (303) extends radially along the flange portion (30), is set at a preset angle with the first connecting groove (301) and communicates with the fixing groove (302); the adjusting rod (403) is slidably connected to the second connecting groove (303). The adjustment assembly further includes a first wedge block (404) and a second spring (405). The first plane of the first wedge block (404) is fixed to the second end of the adjustment rod (403), and the plane of the inclined surface of the first wedge block (404) intersects the adjustment rod (403). The second spring (405) is disposed opposite to the adjustment rod (403) and is located between the second plane of the first wedge block (404) and the fixing groove (302). The connecting block is a second wedge block (406), the inclined surface of the second wedge block (406) is engaged with the inclined surface of the first wedge block (404), and the inclined surface of the second wedge block (406) is located at the end away from the limiting pin (401).

3. The maintenance device according to claim 2, characterized in that, The first connecting groove (301) has at least two and is spaced apart circumferentially along the flange (30), and the first wedge (404) has at least two inclined surfaces; The second wedge block (406) has at least two, and the inclined surface of the second wedge block (406) is engaged with the inclined surface of the first wedge block (404); the limiting pin (401) has at least two, which are respectively fixed to the second wedge block (406) and respectively slidably connected to the first connecting groove (301).

4. The maintenance device according to any one of claims 1-3, characterized in that, The inner wall of the slide (102) also has a second slot (104) that penetrates the housing (10) and the axis of the second slot (104) extends radially along the slide (102); the first slot (103) is closer to the guide groove (101) than the second slot (104); the second slot (104) is configured such that if the limiting pin (401) extends into the second slot (104), the probe (202) retracts into the housing (10).

5. The maintenance device according to any one of claims 1-3, characterized in that, An adjusting block (407) is fixedly provided at the first end of the adjusting rod (403).

6. The maintenance device according to any one of claims 1-3, characterized in that, The housing (10) is provided with straps (50) along its circumference for securing the housing (10) to the operator's arm.

7. The maintenance device according to claim 6, characterized in that, The straps (50) are at least two in number and are spaced apart along the length of the rod body (201); And / or, the end of the strap (50) is provided with Velcro; or, the end of the strap (50) is provided with a buckle structure.

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