CN112901597A

CN112901597A - Magnetic sensor and limiting device

Info

Publication number: CN112901597A
Application number: CN202110324551.3A
Authority: CN
Inventors: 陈兆麟; 陈秉男; 李信一
Original assignee: Kita Sensor Tech Co Ltd
Current assignee: Kita Sensor Tech Co Ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-06-04
Anticipated expiration: 2041-03-26
Also published as: CN112901597B

Abstract

A magnetic sensor comprises a sensor body and at least one limiting device. The sensor body is adapted to detect a magnetic object. The limiting device is detachably arranged on the sensor main body and comprises a mounting seat and a limiting rotary rod. The mounting seat comprises a bottom wall, a first vertical wall, a second vertical wall, a stopping structure and a clamping structure, and is provided with a rod placing groove. The rod placing groove is provided with a rod body groove part and an expansion groove part, and the width of the opening of the rod body groove part at the clamping structure is smaller than that of other parts. The limiting rotary rod comprises a rod body and two clamping blocks, wherein at least one concave section is formed on the side surface of the rod body, and the diameter width of the rod body at the concave section is smaller than that of other parts. The limiting rotary rod can be placed into the rod placing groove by aligning the concave section part with the clamping structure; the limit rotary rod is positioned in the rod placing groove, and the concave section part can be limited and can not be separated from the mounting seat when not aligned with the clamping structure. The clamping block can protrude from the through opening of the expansion groove part and is clamped against the inner wall of the groove. Through the configuration of the fixture block, the fixture block can be conveniently clamped and fixed on the inner wall of the groove through the rotation operation of the limiting rotary rod, so that the magnetic sensor is convenient to disassemble and assemble and change the installation position.

Description

Magnetic sensor and limiting device

Technical Field

The present invention relates to a magnetic sensor and a position limiting device, and more particularly to a magnetic sensor and a position limiting device suitable for being mounted on a pressure cylinder.

Background

The magnetic pressure cylinder is a pressure cylinder with a piston provided with magnetic objects such as a magnetic ring, and the running state of the magnetic pressure cylinder can be controlled by detecting the running position of the piston through a magnetic sensor arranged on a shell. Generally, the magnetic sensor can be fixed on the magnetic pressure cylinder by binding with a binding band, or by a specific fastening structure. However, the above-described fixing method has disadvantages that it is inconvenient to attach and detach the magnetic sensor or to replace the attachment position, and there is a possibility that the magnetic sensor cannot be smoothly attached when the structure and the specification of the magnetic cylinder are different.

Disclosure of Invention

The invention aims to provide a limiting device capable of solving the problems.

The limiting device is suitable for being arranged on an object and can be clamped in the groove in a position-adjustable manner. The limiting device comprises a mounting seat and a limiting rotary rod. The mounting seat comprises a bottom wall, a first vertical wall protruding from the bottom wall, a second vertical wall protruding from the bottom wall and opposite to the first vertical wall at intervals, a stopping structure arranged on the same side of the first vertical wall and the second vertical wall, and a clamping structure arranged on the other side of the first vertical wall and/or the second vertical wall and opposite to the stopping structure at intervals. The bottom wall, the first vertical wall and the second vertical wall are matched to define a rod placing groove, and the rod placing groove is provided with a rod body groove part and an expansion groove part which is communicated with the rod body groove part and is adjacent to the bottom wall. The width of the rod body groove part is smaller than that of the expansion groove part, an opening is formed in one side, corresponding to the clamping structure, of the rod body groove part, the width of the opening at the clamping structure is smaller than that of the opening at other parts, and through openings are formed in one side, corresponding to the stopping structure and the clamping structure, of the expansion groove part respectively. The limiting rotary rod comprises a rod body and two clamping blocks which are rotationally and symmetrically arranged on the opposite side of the rod body, the side surface of the rod body is concave inwards to form at least one concave section, and the diameter width of the rod body corresponding to the concave section is smaller than that of other parts. The limiting rotary rod can be aligned to the clamping structure through the concave section part and placed into the rod placing groove from the opening and the through opening, so that the rod body is located in the rod body groove part and the clamping block is located in the expansion groove part; the limiting rotary rod is positioned in the rod placing groove, and the concave section part can be limited and cannot be separated from the mounting seat when not aligned with the clamping structure; the limiting rotary rod can be operated to rotate along the axis of the limiting rotary rod, so that the clamping block is in a state of being accommodated in the expansion groove part and a state of protruding from the through opening is changed; the clamping block can be clamped against the inner wall of the groove when protruding from the through opening.

In some embodiments, each of the fastening blocks has a bottom surface extending transversely from the rod body, and a fastening inclined surface extending obliquely upward from an outer edge of the bottom surface and connected to the rod body, and each fastening block is defined by the fastening inclined surface to have a structure with gradually changing height and thickness, and can be fastened to the inner wall of the groove by the fastening inclined surface after the rotation of the limiting rotary rod.

In some embodiments, each of the blocks has a bottom thickness and a top thickness, and has a gradual thickness in the length direction of the shaft, and a gradual height in the surrounding direction of the shaft, and a lower height at a portion of the shaft where the thickness of each of the blocks is smaller in the length direction of the shaft.

In some embodiments, the expansion groove portion has a wide bottom and a narrow top, and the expansion groove portion has a height and a width greater than the fixture block.

In some embodiments, the through opening of the expansion groove portion has a bell shape, and the engaging inclined surface has an arc shape.

In some implementation forms, the bottom wall of the mounting seat forms a concave hole on the top surface, into which the bottom end of the shaft is inserted; the limiting rotary rod can move up and down along the concave hole when being positioned in the rod placing groove, and the clamping block can be limited up and down by the top surface of the bottom wall and the top side of the expansion groove part.

In some embodiments, the hosel portion further has a club head slot portion exposed at the top sides of the first vertical wall, the second vertical wall, the stop structure and the strangulation structure and communicating with the shaft slot portion, the club head slot portion is farther from the bottom wall than the shaft slot portion, and the club head slot portion has a greater slot width than the shaft slot portion; the limiting rotary rod further comprises a rod head which is arranged at the top end of the rod body and has a diameter width larger than that of the rod body, and the diameter width of the rod head is between the groove width of the groove part of the rod head and the groove width of the groove part of the rod body.

In some embodiments, the clamping structure has two protrusions spaced apart from each other and disposed on the first and second vertical walls, and the width of the opening between the protrusions corresponds to the diameter width of the shaft corresponding to the concave section.

In some embodiments, the side surface of the shaft is formed with two concave sections at opposite sides, and the concave sections do not overlap with the blocks in the length direction of the shaft.

In some implementations, an outer surface of one of the first standing wall and the second standing wall forms a clamping groove for clamping with the object.

Another object of the present invention is to provide a magnetic sensor. The magnetic sensor comprises a sensor body and at least one limiting device. The sensor main body is suitable for detecting magnetic objects, and the limiting device is detachably arranged on the sensor main body.

In some embodiments, the sensor body includes a housing and a base disposed at a bottom side of the housing and adapted to slide along the groove, and the limiting device is mounted on the base and adapted to be clamped on an inner wall surface of the groove.

The invention has the beneficial effects that: by means of the configuration of the fixture block of the limiting rotary rod, the fixture block can be conveniently clamped and fixed on the inner wall of the groove through the rotation operation of the limiting rotary rod, and therefore the magnetic sensor can be conveniently assembled and disassembled and the installation position of the magnetic sensor can be conveniently changed. In addition, by means of the structural configuration of the gradient height and the gradient thickness of the clamping block, the limiting device can be arranged in grooves with different structural forms, and the convenience in use is improved.

Drawings

FIG. 1 is a perspective view illustrating an embodiment of the magnetic sensor of the present invention mounted on a pressure cylinder;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a perspective view illustrating one embodiment of the magnetic sensor of the present invention;

FIG. 4 is an exploded view of FIG. 3;

FIG. 5 is an exploded perspective view illustrating one embodiment of the spacing device of the present invention;

FIG. 6 is a side view of an embodiment of a stop lever of the stop device;

FIG. 7 is a bottom view of the stop lever;

FIG. 8 is a perspective view illustrating the installation of the stop lever into a mounting block;

FIG. 9 is a side view corresponding to FIG. 8;

FIG. 10 is a perspective view illustrating the stop lever fully installed in the mounting block;

FIG. 11 is a side view corresponding to FIG. 10;

FIG. 12 is a front view illustrating the placement of a magnetic sensor in the channel of the pressure cylinder but not yet secured;

FIG. 13 is a view similar to FIG. 12, illustrating a condition in which the magnetic sensor has been clamped in the groove of the pressure cylinder;

FIG. 14 is an enlarged partial view of FIG. 13;

fig. 15 and 16 are a perspective view and an exploded perspective view illustrating a variation of the stopper device.

Detailed Description

Referring to fig. 1 to 3, a magnetic sensor 100 according to an embodiment of the present invention is shown. The magnetic sensor 100 is suitable for being mounted on an object having a magnetic substance inside, such as the pressure cylinder 200, and can be used for position detection of the magnetic substance. In this embodiment, the pressure cylinder 200 is a magnetic pressure cylinder, and has a plurality of grooves 201 in the form of C-shaped grooves formed on the surface thereof and a piston (not shown) with a magnetic ring mounted therein. In the drawings, the magnetic sensor 100 is variably disposed at one of the grooves 201 to detect an operation position of a piston, and thus can be applied to operation control of the cylinder 200.

Referring to fig. 1 to 4, the magnetic sensor 100 includes a sensor body 1 and at least one position limiting device 2 detachably mounted on the sensor body 1. In this embodiment, the magnetic sensor 100 is described by providing two position-limiting devices 2, but the number is not limited in the implementation.

The sensor body 1 is suitable for detecting a magnetic object, and includes a housing 11, a base 12 disposed at the bottom side of the housing 11 and adapted to slide along the groove 201, two clamping structures 13 disposed at the front and rear sides of the base 12, two indicator lights 14 disposed at the top side of the housing 11, an operation panel 15 disposed at the top side of the housing 11, and a wire 16 extending into the housing 11. A sensing module (not shown) for detecting a magnetic substance and electrically connected to the lead 16 is disposed in the housing 11, and an operating position of the piston in the pressure cylinder 200 can be detected by the sensing module. The locking structure 13 is implemented, for example, in the form of a dovetail so as to engage with the limiting device 2, but the structure can be changed as desired. The indicator light 14 can, for example, present different color signals to display the operation status of the magnetic sensor 100. The control panel 15 is used for the user to set the operation and control the operation of the magnetic sensor 100. The wires 16 may be connected to an external device (not shown) to provide power supply and signal transmission functions.

Referring to fig. 2 to 5, the position limiting device 2 is suitable for being mounted on an object such as the sensor body 1 and is clamped in a groove 201 in an adjustable position. Each of the position-limiting devices 2 includes a mounting base 3 and a position-limiting rotary rod 4, and the position-limiting rotary rod 4 is removably and rotatably mounted in the mounting base 3, as described below.

Referring to fig. 4, 5, 8 and 9, the mounting base 3 includes a bottom wall 31, a first standing wall 32 protruding upward from one side of the bottom wall 31, a second standing wall 33 protruding upward from the other side of the bottom wall 31 and spaced from and facing the first standing wall 32, a stop structure 35 disposed on the same side (upper left in fig. 5) of the first standing wall 32 and the second standing wall 33, and a clamping structure 34 disposed on the other side (lower right in fig. 5) of the first standing wall 32 and/or the second standing wall 33 and spaced from and facing the stop structure 35.

The bottom wall 31 of the mounting base 3 forms a concave hole 311 on the top surface for the bottom end of the limit rotating rod 4 to be inserted into. The outer surface of one of the first standing wall 32 and the second standing wall 33 forms a clamping groove 331 for clamping with the object (i.e. the sensor body 1), in this embodiment, the clamping groove 331 is formed on the side of the second standing wall 33 away from the first standing wall 32, and is implemented in a dovetail groove, for example, so as to be clamped with the clamping structure 13 in a dovetail shape. However, the structural shapes of the clamping groove 331 and the clamping structure 13 can be adjusted according to actual needs, and are not limited to the above embodiments. In this embodiment, the stopping structure 35 is implemented by, for example, a horizontal bar structure with two ends connected to the first vertical wall 32 and the second vertical wall 33 respectively and spaced from the bottom wall 31 as shown in fig. 4, when the rotation-limiting rod 4 is installed in the installation seat 3, the stopping structure 35 can provide a stopping effect to one side of the rotation-limiting rod 4, so as to prevent the rotation-limiting rod 4 from being pulled out of the installation seat 3 from one side of the stopping structure 35. The clamping structure 34 has two protrusions 341 disposed on the first vertical wall 32 and the second vertical wall 33 at an interval, and the space between the protrusions 341 is used for a specific portion (described later) of the rotation-limiting rod 4 to penetrate into the mounting seat 3, and the protrusion 341 can be used to limit the rotation-limiting rod 4 after the rotation-limiting rod 4 is mounted on the mounting seat 3. However, the clamping structure 34 may be formed with only one protrusion 341, and a single protrusion 341 may be mounted on either of the first standing wall 32 and the second standing wall 33, so as to achieve the above-mentioned function.

Referring to fig. 4, 5, 8 and 10, the bottom wall 31, the first standing wall 32 and the second standing wall 33 cooperatively define a rod placing groove 36 for accommodating the limiting rotary rod 4. The shaft holding groove 36 has a shaft groove 361, a shaft groove 362 communicating with the shaft groove 361, and an expansion groove 363 communicating with the shaft groove 362 and adjacent to the bottom wall 31. The head groove 361 is exposed at the top sides of the first standing wall 32, the second standing wall 33, the stopper structure 35, and the clincher structure 34, is farther from the bottom wall 31 than the shaft groove 362, and has a groove width larger than the shaft groove 362. The shaft groove portion 362 has a smaller groove width than the expansion groove portion 363, and the shaft groove portion 362 has an opening (the opening is directed to the lower right in fig. 5) at a side corresponding to the clip structure 34, and the width of the opening at the clip structure 34 is smaller than that at other portions. The expanding slot 363 has a wide bottom and a narrow top, and a through opening is formed at one side corresponding to the stopping structure 35 and the clamping structure 34. In this embodiment, the through openings of the expansion slot 363 are each shaped like a bell to correspond to the structural configuration of the limit lever 4.

Referring to fig. 5 to 8 and 12, the shape of the limit screw 4 is similar to that of a non-threaded special-shaped screw, and includes a shaft 41, a head 42 disposed at the top end of the shaft 41 and having a diameter larger than that of the shaft 41, and two blocks 43 disposed on opposite sides of the shaft 41 in a rotational symmetry manner.

The head 42 has a diameter width between the width of the head groove 361 and the width of the shaft groove 362, and thus can be accommodated in the head groove 361 but cannot enter the shaft groove 362. In addition, the top end of the rod head 42 is matched with the installation tool 300, such as a socket wrench, to form a socket lock hole as shown in the figure, so that the installation tool 300 can be used for performing a rotation clamping operation. However, the structure of the club head 42 for cooperating with the installation tool 300 is not limited to the hexagonal key hole, as required.

The side surface of the shaft 41 is recessed to form at least one recessed section 411, and in this embodiment, the side surface of the shaft 41 is formed with two recessed sections 411 on opposite sides. The diameter width of the shaft 41 corresponding to the concave section 411 is smaller than that of other portions, and the diameter width of the shaft corresponding to the concave section corresponds to the width 34 of the opening of the shaft groove 362 between the protrusions 341. In this way, the rotation-limiting rod 4 can be smoothly installed into the rod-placing groove 36 only when the position of the concave section 411 is aligned with the position between the protrusions 341, and if the position of the rotation-limiting rod 4 other than the concave section 411 is aligned with the position between the protrusions 341, the rotation-limiting rod 4 is stopped by the protrusions 341 and cannot enter the rod-placing groove 36. Correspondingly, when the limiting rotary rod 4 is located in the rod placing groove 36, if the concave section 411 is not aligned with the projection 341, the limiting rotary rod 4 is limited, so that the limiting rotary rod 4 cannot be separated from the mounting seat 3, thereby achieving the fixing effect.

The stoppers 43 are thick at the bottom and thin at the top, and each have a bottom surface 431 extending transversely from the shaft 41, and an abutting inclined surface 432 extending obliquely upward from the outer edge of the bottom surface 431 and connecting the shaft 41 to form an arc shape. Each latch 43 has a bottom with a thick top and a thin top, and the latch inclined plane 432 defines a structure with a gradually changing height and a gradually changing thickness. Specifically, each of the blocks 43 has a gradation thickness in the longitudinal direction of the shaft 41 and a gradation height in the circumferential direction of the shaft 41, and roughly speaking, each block 43 has a lower height at a portion where the thickness is smaller in the longitudinal direction of the shaft 41. For example, taking the latch 43 located on the right side in fig. 6 as an example, the latch 43 is located on the upper right side in fig. 7, the height of the left side (marked a) is lower than that of the right side, and it can be seen from fig. 7 that the thickness of the side (marked a) is smaller than that of the other side (marked B). By the structural configuration of the fixture block 43, the fixture block 43 can be protruded from the rod placing groove 36 by the rotation of each limiting rotary rod 4 of the limiting device 2 to be clamped against the top side of the inner wall of the groove 201, and the structural configuration with gradually changed height and thickness is suitable for clamping and fixing the grooves 201 with different specifications and shapes.

Referring to fig. 5, 8 to 11, the stop lever 4 can be installed at the mounting seat 3 without using a tool, and can be removed from the mounting seat 3 without using a tool. When the limit screw 4 needs to be installed at the installation seat 3, the club head 42 is aligned with the club head groove 361, the concave section 411 of the club body 41 is aligned with the convex block 341 of the clamping structure 34, and the fixture block 43 is aligned with the expansion groove 363, so that the limit screw 4 can be smoothly placed into the club placing groove 36 from the opening of the club body groove 362 and the through opening of the expansion groove 363 as shown in fig. 8 and 9. Then, as shown in fig. 10 and 11, the bottom end of the shaft 41 is inserted into the concave hole 311 of the mounting base 3, so as to complete the installation of the limit rotating rod 4. After the installation is completed, although the height and width of the expansion slot 363 are greater than those of the latch 43, so that the limit rotary rod 4 can move up and down along the concave hole 311 and rotate in the rod placing slot 36, the limit rotary rod 4 can limit the latch 43 up and down by the top surface of the bottom wall 31 and the bottom side of the rod slot 362, and the moving range of the limit rotary rod 4 in the lateral direction is limited by the cooperation of the bottom wall 31, the first standing wall 32, the second standing wall 33, the clamping structure 34 and the stopping structure 35, so that the limit rotary rod 4 can not be separated from the mounting seat 3 when the concave section 411 is not aligned with the 341 bump. Accordingly, if the rotation-limiting lever 4 needs to be removed from the mounting seat 3, the rotation-limiting lever 4 can be removed from the lever-placing groove 36 by simply lifting the rotation-limiting lever 4 and aligning the concave section 411 with the equal-convex block 341 (i.e., the narrowest radial width of the shaft 41 is aligned with the narrowest radial width of the opening).

Referring to fig. 1, 2, 12 to 14, when the magnetic sensor 100 needs to be installed on the pressure cylinder 200, the limiting device 2 can be installed on the clamping structure 13 of the sensor body 1 by the clamping groove 331, and the clamping block 43 of the limiting rotary rod 4 can be accommodated in the expansion groove 363. Subsequently, the stop means 2 and the base 12 of the sensor body 1 can be inserted into the selected groove 201 from above or from the front and rear. Since the latch 43 of the stop lever 4 is accommodated in the expansion slot 363 and does not laterally protrude out of the mounting seat 3 during the mounting process, the magnetic sensor 100 can be directly placed into the groove 201 from above the groove 201, there is no fear that the latch 43 will obstruct the mounting process, and the user is not limited to mounting the magnetic sensor 100 from the front end or the rear section of the groove 201. After the magnetic sensor 100 is placed at a predetermined position, the installation tool 300 can apply force to the rod head 42 of the limiting rotary rod 4, so that the limiting rotary rod 4 is operated to rotate along its axis, and the state of the fixture block 43 being accommodated in the expansion groove 363 and the state of protruding from the through hole are changed. As shown in fig. 14, when the latch 43 protrudes from the through opening of the expanding slot 363, it can be engaged with the top side of the inner wall of the groove 201, so as to provide an engaging and fixing effect, and firmly fix the magnetic sensor 100 on the pressure cylinder 200. Moreover, the structural arrangement of the fixture blocks 43 with gradually changing heights and thicknesses can be flexibly applied to the grooves 201 with different shapes, for example, when the grooves 201 are changed from C-shaped grooves to T-shaped grooves in the drawings, or the size and shape of the grooves are changed, the magnetic sensor 100 can be fixed by the same limiting device 2, so that the use flexibility and convenience can be improved.

Referring to fig. 15 and 16, a variation of the position limiting device 2 is shown. Compared with the previous embodiment, the main difference of this variation is that the stop lever 4 has only one shaft 41 and two blocks 43, and does not form the head 42 with a larger diameter as described above. Accordingly, the shaft placing groove 36 of the mounting seat 3 has only a shaft groove portion 362 corresponding to the shaft 41 and an expansion groove portion 363 corresponding to the engaging block 43, and the shaft groove portion 361 having a larger groove width is not formed as described above. However, in this variation, the rotation-limiting lever 4 can still be installed in the installation seat 3 in such a way that the concave section 411 is laterally aligned with the protrusion 341, and the latch 43 can be also rotatably engaged with the inner wall of the groove 201, so as to achieve the fixing effect.

In summary, the magnetic sensor 100 and the position limiting device 2 of the present invention can easily clamp the clamping block 43 on the inner wall of the groove 201 by the rotation operation of the position limiting rotary rod 4 through the arrangement of the clamping block 43 of the position limiting rotary rod 4, thereby facilitating the assembly and disassembly of the magnetic sensor 100 and the change of the installation position. In addition, by the structural arrangement of the gradually-changing height and the gradually-changing thickness of the fixture block 43, the limiting device 2 can be installed in the grooves 201 with different structural forms, so that the use elasticity and convenience are improved. Therefore, the magnetic sensor 100 and the stopper device 2 of the present invention can achieve the object of the present invention.

Claims

1. A kind of stop device, is suitable for installing on things, and the adjustable position is blocked and fixed in the ditch groove, the said stop device includes:

the mounting seat comprises a bottom wall, a first vertical wall protruding from the bottom wall, a second vertical wall protruding from the bottom wall and opposite to the first vertical wall at intervals, and a stop structure arranged on the same side of the first vertical wall and the second vertical wall, and a clamping structure arranged on the other side of the first vertical wall and/or the second vertical wall and opposite to the stop structure at a certain interval, the bottom wall, the first vertical wall and the second vertical wall are matched to define a rod placing groove, the rod placing groove is provided with a rod body groove part and an expansion groove part which is communicated with the rod body groove part and is adjacent to the bottom wall, the groove width of the rod body groove part is smaller than that of the expansion groove part, and the shaft groove part is provided with an opening at one side corresponding to the clamping structure, the width of the opening at the clamping structure is smaller than that of other parts, the expansion groove part is provided with through openings at one side corresponding to the stopping structure and the clamping structure respectively; and

the limiting rotary rod comprises a rod body and two clamping blocks which are rotationally and symmetrically arranged on the opposite side of the rod body, the side surface of the rod body is concave inwards to form at least one concave section, the diameter width of the rod body corresponding to the concave section is smaller than that of other parts,

the limiting rotary rod can be aligned to the clamping structure through the concave section part and placed into the rod placing groove from the opening and the through opening, so that the rod body is located in the rod body groove part and the clamping block is located in the expansion groove part; the limiting rotary rod is positioned in the rod placing groove, and the concave section part can be limited and cannot be separated from the mounting seat when not aligned with the clamping structure; the limiting rotary rod can be operated to rotate along the axis of the limiting rotary rod, so that the clamping block is in a state of being accommodated in the expansion groove part and a state of protruding from the through opening is changed; the clamping block can be clamped against the inner wall of the groove when protruding from the through opening.

2. The spacing device of claim 1, wherein: each clamping block is provided with a bottom surface which extends transversely from the rod body and a clamping and abutting inclined surface which extends upwards from the outer edge of the bottom surface in an inclined manner and is connected with the rod body, and each clamping block is defined with a structure with gradually changed height and thickness by the clamping and abutting inclined surface and can be clamped and abutted against the inner wall of the groove by the clamping and abutting inclined surface after the limiting rotary rod rotates.

3. A spacing device according to claim 2, characterized in that: each clamping block is in a shape of thick bottom and thin top, and has a gradual change thickness in the length direction of the rod body, and has a gradual change height in the surrounding direction of the rod body, and the part of the rod body with smaller thickness of each clamping block has a lower height in the length direction of the rod body.

4. A spacing device according to claim 3, characterized in that: the expansion groove part is wide at the bottom and narrow at the top, and the height and the width of the expansion groove part are larger than the clamping block.

5. A spacing device according to claim 4, characterized in that: the through opening of the expansion groove part is in a bell shape, and the clamping inclined plane is in an arc surface shape.

6. A spacing device according to claim 4, characterized in that: a concave hole for inserting the bottom end of the rod body is formed in the top surface of the bottom wall of the mounting seat; the limiting rotary rod can move up and down along the concave hole when being positioned in the rod placing groove, and the clamping block can be limited up and down by the top surface of the bottom wall and the top side of the expansion groove part.

7. The spacing device of claim 1, wherein: the club placing groove is also provided with a club head groove part which is exposed at the top sides of the first vertical wall, the second vertical wall, the stopping structure and the clamping structure and is communicated with the club body groove part, the club head groove part is far away from the bottom wall compared with the club body groove part, and the groove width of the club head groove part is larger than that of the club body groove part; the limiting rotary rod further comprises a rod head which is arranged at the top end of the rod body and has a diameter width larger than that of the rod body, and the diameter width of the rod head is between the groove width of the groove part of the rod head and the groove width of the groove part of the rod body.

8. The spacing device of claim 1, wherein: the clamping structure is provided with two lugs which are opposite at intervals and are respectively arranged on the first vertical wall and the second vertical wall, and the width of the opening between the lugs corresponds to the diameter width of the concave section part of the rod body.

9. The spacing device of claim 1, wherein: the side surface of the rod body is provided with two concave sections at the opposite sides, and the concave sections are not overlapped with the fixture blocks in the length direction of the rod body.

10. The spacing device of claim 1, wherein: one of the outer surfaces of the first vertical wall and the second vertical wall forms a clamping groove used for being clamped with the object.

11. A magnetic sensor, comprising:

a sensor body adapted to sense a magnetic object; and

at least one spacing device according to any of claims 1 to 10, removably mounted to the sensor body.

12. The magnetic sensor according to claim 11, wherein: the sensor main body comprises a shell and a base which is arranged on the bottom side of the shell and is suitable for sliding along a groove, and the limiting device is arranged on the base and is suitable for being clamped on the inner wall surface of the groove.