An adjustable fixing bracket for Hall devices

Abstract

The present invention relates to an adjustable fixing bracket for a Hall device, comprising: a base having a notch provided inside and mounting holes provided on four sides; a disc movably mounted in the notch; a rotating shaft, one end of which is fixedly mounted at the bottom of the disc and the other end of which movably penetrates the bottom of the base; a protrusion fixedly mounted in the middle of the top of the base for initially positioning the Hall device; a moving groove annularly arranged on the surface of the base and set to be multiple in number; a positioning component slidably connected to the moving groove and adapted to the disc for further positioning the Hall device; a buffer component provided in the positioning component for preventing the positioning component from over-pressing and positioning Hall components of different sizes. The adjustable fixing bracket for a Hall device provided by the present invention realizes the movement of the movable block towards the Hall device through the cooperation of multiple components such as the disc, the curved groove, the rotating shaft, and the positioning rod, so as to limit and fix the Hall device.

Description

Technical Field

[0001] The present invention relates to the technical field of Hall device installation, and particularly to an adjustable fixing bracket for Hall devices. Background Art

[0002] A Hall device is a sensor element that uses the Hall effect to detect a magnetic field. When a current passes perpendicularly through a semiconductor wafer in an external magnetic field, charge accumulation occurs on one side of the wafer, forming an electric potential difference, i.e., the Hall voltage. This voltage is proportional to the product of the magnetic induction intensity and the excitation current, and inversely proportional to the thickness of the wafer. By measuring the Hall voltage, the magnitude of the magnetic induction intensity can be determined. During use, a fixing bracket is required to fix the Hall device to ensure its stability during measurement.

[0003] In actual use, due to the diverse sizes of Hall devices, when using the same fixing bracket to clamp and fix Hall devices of different sizes, special attention needs to be paid to adjusting the moving distance of the clamping rod. If the operator lacks experience and the size of the Hall device changes, if the moving distance of the clamping rod towards the Hall device is not accurately adjusted, it is easy to cause excessive clamping of the Hall device by the clamping rod, which may damage the external structure of the Hall device and thus affect its normal use. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide an adjustable fixing bracket that can avoid over-squeezing and positioning of Hall components of different sizes.

[0005] An adjustable fixing bracket for Hall devices provided by the present invention includes:

[0006] A base having a notch provided inside and mounting holes provided on four sides;

[0007] A disc movably installed in the notch;

[0008] A rotating shaft, one end of which is fixedly installed at the bottom of the disc and the other end of which movably penetrates through the bottom of the base;

[0009] A protrusion fixedly installed in the middle of the top of the base for initially positioning the Hall device;

[0010] Moving grooves are annularly and arrayedly provided on the surface of the base, and the number is set to be multiple;

[0011] A positioning component is slidably connected to the moving grooves and is adapted to the disc for further positioning the Hall device;

[0012] A buffer component is provided in the positioning component for preventing the positioning component from over-squeezing and positioning Hall components of different sizes.

[0013] In one embodiment, the positioning assembly includes a movable block, the movable block is slidably connected to the moving groove, a positioning rod is fixedly arranged at the bottom of the movable block, a plurality of curved grooves are annularly and arrayedly formed on the disc, and one end of the positioning rod away from the movable block is slidably fitted with the curved groove.

[0014] In one embodiment, the buffer assembly includes a movable plate, a transverse groove is formed in the movable block, the movable plate is slidably connected to the transverse groove, one end of the movable plate away from the transverse groove is movably abutted against a Hall device, and the movable plate is connected to the inner wall of the transverse groove through a positioning spring.

[0015] In one embodiment, a gear is fixedly sleeved on the outer side of the part of the rotating shaft located below the base, a rotating disc is movably embedded on the outer side of the rotating shaft, a clamping groove is formed on one side of the rotating disc, a clamping block is movably arranged in the clamping groove, and the other end of the clamping block is movably meshed and driven with the gear.

[0016] In one embodiment, a vertical groove is formed in the rotating shaft above the gear, a ring is movably arranged in the vertical groove, and a connecting rod is fixedly arranged between the bottom of the ring and the clamping block.

[0017] In one embodiment, a circular groove is formed on the outer side of the ring, a moving frame is movably fitted in the circular groove, one end of the moving frame away from the ring movably penetrates through the base and the end is located above the base.

[0018] In one embodiment, a lifting rod is movably arranged in the transverse groove, a reset spring is fixedly arranged between the top of the lifting rod and the inner wall of the transverse groove, and one end of the lifting rod away from the transverse groove is slidably fitted with the bottom of the moving frame.

[0019] In one embodiment, a moving block is fixedly arranged at the top of the movable plate, an inclined groove is formed in the moving block, a limiting rod is fixedly arranged at the bottom of the lifting rod, and the limiting rod is movably abutted against the inclined groove.

[0020] In one embodiment, a fixing plate is fixedly arranged on the base on one side of the movable block, a plurality of limiting holes are transversely and linearly arrayed on the fixing plate, a circular hole is formed in the movable block close to the fixing plate, a limiting ball is arranged at one end of the movable plate close to the circular hole, and the limiting ball is movably clamped with the circular hole and the limiting hole.

[0021] In one embodiment, a positioning ring is fixedly arranged in the limiting hole, a top rod is movably penetrated through the center of the positioning ring, one end of the top rod is movably abutted against the limiting ball, and a connecting spring is fixedly arranged between the top rod and the positioning ring.

[0022] The above adjustable fixing bracket for Hall devices realizes the movement of the movable block towards the Hall device for limiting and fixing the Hall device through the cooperation of multiple components such as a disc, a curved groove, a rotating shaft, and a positioning rod; through the cooperation of multiple components such as a movable plate, a moving block, an inclined groove, a limiting rod, a lifting rod, and a clamping block, when the movable block abuts against the Hall device, the rotation of the rotating disc will not drive the synchronous rotation, and the movable block will no longer move, avoiding excessive extrusion and positioning of the Hall device; the clamping of the limiting ball with the limiting hole and the round hole ensures that the movable block will not move in the positioned state, ensuring the stability of the positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the protrusion in the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the bottom of the base in the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the positioning component in the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the positioning rod in the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the buffer component in the present invention;

[0030] Figure 7 It is a schematic diagram of the structure of the positioning spring in the present invention;

[0031] Figure 8 It is a schematic diagram of the positional relationship between the clamping block and the gear in the present invention;

[0032] Figure 9 It is a schematic diagram of the structure of the limiting ball in the present invention;

[0033] Figure 10 It is a schematic diagram of the structure of the ejector rod in the present invention.

[0034] Reference Signs:

[0035] 1. Base; 101. Notch; 102. Moving groove; 2. Protrusion; 3. Rotating shaft; 31. Vertical groove; 4. Positioning component; 41. Movable block; 42. Positioning rod; 43. Disc; 44. Curved groove; 5. Buffer component; 51. Movable plate; 52. Horizontal groove; 53. Positioning spring; 6. Gear; 7. Rotating disc; 71. Card slot; 8. Card block; 9. Ring; 91. Circular groove; 10. Connecting rod; 11. Moving frame; 12. Lifting rod; 13. Return spring; 14. Moving block; 141. Inclined groove; 15. Limiting rod; 16. Fixed plate; 161. Limiting hole; 17. Circular hole; 18. Limiting ball; 19. Positioning ring; 20. Jacking rod; 21. Connecting spring. Detailed implementation manner

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present invention are only for the purpose of illustration and do not represent the only implementation manner.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature being "above", "over" or "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" or "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is lower than that of the second feature.

[0040] Unless otherwise defined, all technical and scientific terms used in the description of the present invention have the same meaning as commonly understood by those skilled in the technical field to which the present invention pertains. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the description of the present invention includes any and all combinations of one or more of the related listed items.

[0041] The following combines Figures 1 - 10 to describe an adjustable fixing bracket for a Hall device according to the present invention.

[0042] As Figures 1 - 6 shown, in one embodiment, it includes a base 1, a disc 43, a rotating shaft 3, a protrusion 2, a moving groove 102, a positioning assembly 4 and a buffer assembly 5.

[0043] The base 1 is provided with a notch 101 and a mounting hole; the disc 43 is movably installed in the notch 101; the rotating shaft 3 has one end fixedly installed at the bottom of the disc 43 and the other end movably passing through the bottom of the base 1; the protrusion 2 is fixedly installed in the middle of the top of the base 1 for preliminarily positioning the Hall device; the moving groove 102 is arranged in an annular array on the surface of the base 1 and the number is set to be multiple; the positioning assembly 4 is slidably connected with the moving groove 102 and is adapted to the disc 43 for further positioning the Hall device; the buffer assembly 5 is arranged in the positioning assembly 4 to prevent the positioning assembly 4 from excessively squeezing and positioning Hall components of different sizes.

[0044] Specifically, the base 1 is installed on the device by screwing a screw through the mounting hole. A notch is provided at the bottom of the Hall device to be adapted to the protrusion 2, so that the Hall device can be preliminarily positioned on the surface of the base 1. In this application, the number of moving grooves 102 is designed to be three, and the number of positioning components 4 is also set to three to limit and fix the Hall device with a circular appearance. Rotate the rotating shaft 3. The rotation of the rotating shaft 3 drives the disk 43 arranged in the notch 101 to rotate, so that the three groups of positioning components 4 move along the moving groove 102 towards the Hall device to position it. The buffer component 5 abuts against the Hall device prior to the positioning component 4, which can prevent the positioning component 4 from excessively squeezing and positioning the edge of the Hall device, thereby damaging the Hall device.

[0045] Refer to Figures 2 - 5 As shown, in this embodiment, the positioning component 4 includes a movable block 41. The movable block 41 is slidably connected to the moving groove 102. A positioning rod 42 is fixedly arranged at the bottom of the movable block 41. A plurality of curved grooves 44 are annularly arranged on the disk 43. One end of the positioning rod 42 away from the movable block 41 is slidably fitted with the curved groove 44.

[0046] Specifically, rotate the rotating shaft 3. The rotation of the rotating shaft 3 drives the disk 43 to rotate. The rotation of the disk 43 drives the curved groove 44 to rotate, thereby driving the positioning rod 42 to move. The movement of the positioning rod 42 will drive the movable block 41 to move along the moving groove 102 towards the Hall device, so as to position the Hall device. The rotation angle of the disk 43 determines the moving distance of the movable block 41. According to Hall devices with different diameters, by adjusting the rotation angle of the disk 43, the moving distance of the movable block 41 can be controlled, and Hall devices of different sizes can be positioned.

[0047] Refer to Figures 6 - 7 As shown, in this embodiment, the buffer component 5 includes a movable plate 51. A transverse groove 52 is formed in the movable block 41. The movable plate 51 is slidably connected to the transverse groove 52. One end of the movable plate 51 away from the transverse groove 52 is movably abutted against the Hall device. The movable plate 51 is connected to the inner wall of the transverse groove 52 by a positioning spring 53.

[0048] Specifically, when the movable block 41 moves towards the Hall device, it will drive the movable plate 51 to move synchronously. In the initial state, a part of the movable plate 51 is located outside the transverse groove 52. The movable plate 51 will abut against the Hall device one step ahead of the movable block 41. After the movable plate 51 contacts the Hall device, the movable block 41 is still moving. The movable plate 51 will move towards the inside of the transverse groove 52 under the extrusion of the Hall device, thereby compressing the positioning spring 53, which can play a certain buffering role and avoid excessive extrusion.

[0049] Refer to Figure 8As shown, in this embodiment, a gear 6 is fixedly sleeved on the outer side of the lower part of the rotating shaft 3 below the base 1. A rotating disk 7 is movably embedded on the outer side of the rotating shaft 3. A clamping groove 71 is formed on one side of the rotating disk 7. A clamping block 8 is movably arranged in the clamping groove 71, and the other end of the clamping block 8 is movably meshed and driven with the gear 6.

[0050] Specifically, when the Hall device needs to be positioned, rotate the rotating disk 7. In the initial state, the clamping block 8 is clamped with the clamping groove 71 and meshed with the gear 6. The rotation of the rotating disk 7 will drive the clamping block 8 to rotate, thereby driving the gear 6 to rotate. The rotation of the gear 6 will drive the rotating shaft 3 to rotate, thereby realizing the rotation of the disk 43, and further enabling the movable block 41 to move towards the Hall device for positioning. The movable plate 51 first abuts against the Hall device and then moves into the transverse groove 52. When the movable plate 51 completely moves into the movable block 41, the movable block 41 just abuts against the Hall device. At this time, move the clamping block 8 upward along the clamping groove 71, and the clamping block 8 will disengage from the gear 6. At this time, rotating the rotating disk 7 will not drive the gear 6 to rotate, so the rotating shaft 3 will not rotate either, and the movable block 41 will not continue to squeeze the Hall device, preventing damage to the Hall device caused by excessive squeezing.

[0051] Refer to Figure 3 and Figure 8 As shown, in this embodiment, a vertical groove 31 is formed in the rotating shaft 3 above the gear 6. A circular ring 9 is movably arranged in the vertical groove 31. A connecting rod 10 is fixedly arranged between the bottom of the circular ring 9 and the clamping block 8.

[0052] Specifically, when positioning the Hall device, the rotation of the rotating disk 7 will drive the clamping block 8, the gear 6, the connecting rod 10, the circular ring 9 and the rotating shaft 3 to rotate synchronously together. The movable block 41 will move towards the Hall device. When the movable block 41 abuts against the Hall device, move the circular ring 9 upward. The upward movement of the circular ring 9 along the vertical groove 31 will drive the connecting rod 10 and the clamping block 8 to move upward. The clamping block 8 is no longer meshed with the gear 6. At this time, the rotation of the rotating disk 7 will only drive the clamping block 8, the connecting rod 10 and the circular ring 9 to rotate together, and the gear 6 and the rotating shaft 3 do not rotate, and the movable block 41 no longer continues to move towards the Hall device, which can avoid excessive squeezing of the Hall device.

[0053] Refer to Figure 3 As shown, in this embodiment, a circular groove 91 is formed on the outer side of the circular ring 9. A moving frame 11 is movably and fittingly arranged in the circular groove 91. One end of the moving frame 11 away from the circular ring 9 movably penetrates through the base 1 and the end is located above the base 1.

[0054] Specifically, when positioning, after the movable block 41 abuts against the Hall device, the moving frame 11 is moved upward. When the moving frame 11 moves upward, it will drive the ring 9 to move upward through the action of the circular groove 91. When the ring 9 moves upward, it will drive the connecting rod 10 and the clamping block 8 to move upward, so that the clamping block 8 no longer meshes with the gear 6. Subsequently, the rotation of the rotating disc 7 will not drive the rotating shaft 3 to rotate.

[0055] Refer to Figure 6 As shown, in this embodiment, a lifting rod 12 is movably arranged in the transverse groove 52. A return spring 13 is fixedly arranged between the top of the lifting rod 12 and the inner wall of the transverse groove 52. One end of the lifting rod 12 away from the transverse groove 52 is in sliding fit with the bottom of the moving frame 11.

[0056] Specifically, when positioning the Hall device, the movable block 41 moves transversely along the moving groove 102, and the lifting rod 12 slides along the bottom of the moving frame 11. When the movable block 41 abuts against the Hall device, the lifting rod 12 is moved upward. During this process, the return spring 13 is compressed. When the lifting rod 12 moves upward, it will drive the moving frame 11 to move upward, so that the clamping block 8 is disengaged from the gear 6. Subsequently, when the rotating disc 7 rotates, it will not drive the rotating shaft 3 to rotate synchronously, and the movable block 41 will not excessively squeeze the Hall device.

[0057] Refer to Figures 5 - 6 As shown, in this embodiment, a moving block 14 is fixedly arranged at the top of the movable plate 51. The moving block 14 is provided with an inclined groove 141. A limiting rod 15 is fixedly arranged at the bottom of the lifting rod 12, and the limiting rod 15 is in movable abutment with the inclined groove 141.

[0058] Specifically, when positioning the Hall device, the movable plate 51 first contacts the Hall device and then moves towards the inside of the transverse groove 52. The movement of the movable plate 51 will drive the moving block 14 to move. During the movement of the moving block 14, it will drive the inclined groove 141 to move. The limiting rod 15 will move upward along the bottom of the inclined groove 141. The limiting rod 15 will move upward to drive the lifting rod 12 to move upward, so that the moving frame 11 and the clamping block 8 both move upward. When the limiting rod 15 moves to the highest point of the inclined groove 141, the movable plate 51 just moves to the inside of the transverse groove 52. The movable block 41 abuts against the Hall device, and the clamping block 8 is disengaged from the gear 6. At this time, the rotation of the rotating disc 7 will not drive the rotating shaft 3 to move synchronously, and the movable block 41 will not excessively squeeze the Hall device. When it is necessary to release the positioning of the Hall device, the rotating shaft 3 is rotated in the reverse direction.

[0059] Refer to Figures 1 - 3 、 Figure 5 and Figure 9As shown, in this embodiment, a fixing plate 16 is fixedly arranged on one side of the base 1 close to the movable block 41. A plurality of limiting holes 161 are arranged in a horizontal linear array on the fixing plate 16. A circular hole 17 is formed on the side of the movable block 41 close to the fixing plate 16. A limiting ball 18 is arranged at one end of the movable plate 51 close to the circular hole 17. The limiting ball 18 is movably clamped with the circular hole 17 and the limiting holes 161.

[0060] Specifically, the movable block 41 drives the movable plate 51 to move towards the Hall device together. After the movable plate 51 contacts the Hall device, it will move towards the inside of the transverse groove 52. The limiting ball 18 is made of an elastic material. Before the limiting ball 18 reaches the circular hole 17, it will abut against the inner wall of the movable block 41 and be in a compressed state. When the limiting ball 18 moves to the position of the circular hole 17, it will expand and be clamped with one of the limiting holes 161 formed in the circular hole 17 and the fixing plate 16, ensuring that the movable block 41 no longer moves and ensuring the stability of positioning. The design of a plurality of limiting holes 161 can meet the positioning requirements of Hall devices with different diameters.

[0061] Refer to Figure 10 As shown, in this embodiment, a positioning ring 19 is fixedly arranged in the limiting hole 161. A ejector rod 20 is movably penetrated through the center of the positioning ring 19. One end of the ejector rod 20 is movably abutted against the limiting ball 18. A connecting spring 21 is fixedly arranged between the ejector rod 20 and the positioning ring 19.

[0062] Specifically, when it is necessary to release the clamping of the limiting ball 18 with the limiting hole 161 and the circular hole 17, the limiting hole 161 moves the ejector rod 20 inward. The inward movement of the ejector rod 20 will push the limiting ball 18 to release the clamping with the limiting hole 161 and the circular hole 17. The movable plate 51 can move relative to the movable block 41. During this process, the connecting spring 21 will be compressed. Subsequently, the acting force applied to the ejector rod 20 is removed. Under the action of the connecting spring 21, the ejector rod 20 will be driven back to the initial position. The positioning ring 19 provides a supporting effect for the connecting spring 21.

[0063] During implementation, the base 1 is installed on the device by screwing a screw through the mounting hole. A notch is provided at the bottom of the Hall device to fit with the protrusion 2, so that the Hall device can be initially positioned on the surface of the base 1. When the Hall device needs to be positioned, rotate the rotating disk 7. In the initial state, the block 8 is engaged with the card slot 71 and meshes with the gear 6. The rotation of the rotating disk 7 will drive the block 8 to rotate, which will drive the gear 6 to rotate. The rotation of the gear 6 will drive the rotating shaft 3 to rotate, thus realizing the rotation of the disk 43. The rotation of the disk 43 drives the curve groove 44 to rotate, which drives the positioning rod 42 to move. The movement of the positioning rod 42 drives the movable block 41 to move along the moving groove 102 towards the direction close to the Hall device, so that the Hall device can be positioned. The rotation angle of the disk 43 determines the moving distance of the movable block 41. According to Hall devices with different diameters, by adjusting the rotation angle of the disk 43, the moving distance of the movable block 41 can be controlled, and Hall devices of different sizes can be positioned. The movable plate 51 first abuts against the Hall device and then moves into the transverse groove 52. When the movable plate 51 completely moves into the movable block 41, the movable block 41 just abuts against the Hall device. The movement of the movable plate 51 drives the moving block 14 to move. During the movement of the moving block 14, the inclined groove 141 will be driven to move. The limiting rod 15 will move upward along the bottom of the inclined groove 141. The limiting rod 15 will move upward, driving the lifting rod 12 to move upward, so that the moving frame 11 and the block 8 both move upward. When the limiting rod 15 moves to the highest point of the inclined groove 141, the movable plate 51 just moves into the transverse groove 52, the movable block 41 abuts against the Hall device, and the block 8 disengages from the gear 6. At this time, the rotation of the rotating disk 7 will not drive the rotating shaft 3 to move synchronously, and the movable block 41 will not over-press the Hall device. At the same time, the movable block 41 drives the movable plate 51 to move towards the Hall device together. After the movable plate 51 contacts the Hall device, it will move into the transverse groove 52. The limiting ball 18 is made of an elastic material. Before the limiting ball 18 reaches the round hole 17, it will abut against the inner wall of the movable block 41 and be in a compressed state. When the limiting ball 18 moves to the position of the round hole 17, it will expand and be engaged with one of the limiting holes 161 opened by the round hole 17 and the fixing plate 16, ensuring that the movable block 41 no longer moves and ensuring the stability of the positioning. The design of multiple limiting holes 161 can meet the positioning requirements of Hall devices with different diameters.

[0064] The technical features of the above-described embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0065] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. An adjustable fixing bracket for a Hall device, characterized in that, Comprising: A base, having a notch provided inside and mounting holes provided on four sides; A disc, movably mounted in the notch; A rotating shaft, one end fixedly mounted at the bottom of the disc and the other end movably passing through the bottom of the base; A protrusion, fixedly mounted in the middle of the top of the base, for preliminarily positioning the Hall device; Moving grooves, annularly and arrayedly opened on the surface of the base, and the number is set to be multiple; A positioning assembly, slidably connected to the moving grooves and adapted to the disc, for further positioning the Hall device; A buffer assembly, provided in the positioning assembly, for preventing the positioning assembly from overly squeezing and positioning Hall assemblies of different sizes; The positioning assembly includes a movable block, the movable block is slidably connected to the moving grooves, a positioning rod is fixedly provided at the bottom of the movable block, a plurality of curved grooves are annularly and arrayedly opened on the disc, and one end of the positioning rod away from the movable block is slidably fitted with the curved grooves. The buffer assembly includes a movable plate, a transverse groove is opened in the movable block, the movable plate is slidably connected to the transverse groove, one end of the movable plate away from the transverse groove is movably abutted against the Hall device, and the movable plate and the inner wall of the transverse groove are connected by a positioning spring. A gear is fixedly sleeved on the outer side of the part of the rotating shaft located below the base, a rotating disc is movably embedded on the outer side of the rotating shaft, a clamping groove is opened on one side of the rotating disc, a clamping block is movably arranged in the clamping groove, and the other end of the clamping block is movably meshed and driven with the gear. A vertical groove is opened on the rotating shaft above the gear, a circular ring is movably arranged in the vertical groove, a connecting rod is fixedly provided between the bottom of the circular ring and the clamping block, a circular groove is opened on the outer side of the circular ring, a moving frame is movably fitted in the circular groove, one end of the moving frame away from the circular ring movably passes through the base and the end is located above the base. A lifting rod is movably arranged in the transverse groove, a return spring is fixedly provided between the top of the lifting rod and the inner wall of the transverse groove, and the end of the lifting rod away from the transverse groove is slidably fitted with the bottom of the moving frame. A moving block is fixedly provided at the top of the movable plate, an inclined groove is opened in the moving block, a limiting rod is fixedly provided at the bottom of the lifting rod, and the limiting rod is movably abutted against the inclined groove. A fixing plate is fixedly provided on one side of the base where the movable block is located, a plurality of limiting holes are transversely and linearly arrayedly arranged on the fixing plate, a circular hole is opened on the side of the movable block close to the fixing plate, a limiting ball is arranged at one end of the movable plate close to the circular hole, and the limiting ball is movably clamped with the circular hole and the limiting holes.

2. The adjustable fixing bracket for a Hall device according to claim 1, characterized in that, A positioning ring is fixedly provided in the limiting hole, a top rod is movably penetrated through the center of the positioning ring, one end of the top rod is movably abutted against the limiting ball, and a connecting spring is fixedly provided between the top rod and the positioning ring.

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