Magnetic steel support point glue fixing jig
Patent Information
- Application Number
- CN202521794151.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-22
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-08-22
AI Technical Summary
1) 大尺寸磁钢采用点胶粘接方式装配磁钢支架组件过程中，磁钢支架手工放置磁钢的方式无法确保各磁钢支架组件中磁钢极性的一致性
[0013]有益效果：本实用新型通过在放置板上设置贴片，磁钢、磁钢支架、保压杆组件一同吸附在贴片上，且使磁钢与磁钢支架之间保持一定的压力，保证磁钢与磁钢支架的粘结效果；通过将带孔磁钢的下端面设置为中部凹陷设置的锥型沉孔面，并将限位部的上表面设置为与带孔磁钢的下端面配合的锥形面，可快速确定带孔磁钢的安装方向，方便快捷；通过设定带孔磁钢的磁极方向来确定磁钢的磁极方向，保证同批次产品磁钢极性的一致性。
Smart Images
Figure CN224793885U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wheel speed sensor manufacturing technology, specifically to a magnetic steel bracket adhesive fixing fixture. Background Technology
[0002] Wheel speed sensors and their associated magnet bracket assemblies are crucial components of e-bikes. During production, the polarity of the magnets in each magnet bracket assembly must be consistent. During assembly, the distance between the magnets on each magnet bracket assembly and the sensor must be consistent to ensure the accuracy and stability of the wheel speed sensor signal acquisition. There are two assembly methods for magnet bracket assemblies: interference fit and adhesive bonding. Small magnets can be assembled using interference fit, while large magnets can only be assembled using adhesive bonding because the magnet material is hard and brittle, and interference fit will cause localized breakage and failure. In adhesive bonding, there are two methods for placing the magnets in the bracket: manual placement and jig-assisted placement. After placing the magnets in the bracket and applying adhesive, the placement of the magnet bracket assembly awaiting curing also falls into two categories: placement without a fixed position and placement with a jig for positioning.
[0003] Deficiencies of existing technology: 1) When assembling large-size magnets using adhesive bonding, the manual placement of magnets in the magnet bracket cannot ensure the consistency of magnet polarity in each magnet bracket assembly.
[0004] 2) During the production process, when the magnetic steel bracket assembly for the adhesive to cure is placed without a fixed position, the placement of each magnetic steel bracket assembly is not fixed and they are easily attracted together. Before the adhesive on each magnetic steel bracket assembly cures, once the magnets attract each other, there is a risk of them becoming loose or tilted from the magnetic steel bracket assembly. This can lead to inconsistent distances between the magnets on each magnetic steel bracket assembly and the wheel speed sensor after installation, affecting the accuracy, stability and consistency of the wheel speed sensor signal acquisition. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a magnetic steel bracket adhesive fixing fixture.
[0006] To achieve the above objectives, this utility model provides a magnetic steel bracket dispensing and fixing fixture, including a placement plate. Several patches are fixed on the upper side of the placement plate, and a magnetic steel bracket is provided on the upper side of each patch. The upper side of the magnetic steel bracket is bonded and fixed to a magnet. A magnetic attraction force is generated between the magnet and the patch, so that the magnet and the magnetic steel bracket are attracted to the patch. A pressure holding rod assembly is provided on the upper side of the magnet to increase the pressure between the magnet and the magnetic steel bracket.
[0007] Furthermore, the pressure-holding rod assembly includes a rod body, the lower end of which is provided with a limiting part, and a perforated magnet is sleeved on the upper side of the limiting part. The perforated magnet and the magnet opposite to each other have opposite polarities. A fixing nut is threadedly connected to the rod body, and the fixing nut is used to fix the perforated magnet to the lower end of the rod body.
[0008] Furthermore, a sleeve is fitted on the outer side of the rod between the fixing nut and the perforated magnet.
[0009] Furthermore, the lower end face of the perforated magnet is a conical countersunk hole with a central recess, and the upper surface of the limiting part is a conical surface that mates with the lower end face of the perforated magnet.
[0010] Furthermore, the upper side of the placement plate is provided with a positioning groove, and the patch is embedded in the positioning groove.
[0011] Furthermore, the outer side of the positioning groove is provided with a plurality of fixing screws, which are used to fix the patch in the positioning groove.
[0012] Furthermore, the upper side of the placement plate is provided with multiple positioning posts, and the lower side is provided with slots that cooperate with the positioning posts.
[0013] Beneficial effects: This utility model uses a patch on a placement plate, where the magnet, magnet bracket, and pressure-holding rod assembly are adsorbed onto the patch, maintaining a certain pressure between the magnet and the magnet bracket to ensure effective adhesion. By setting the lower end face of the perforated magnet as a conical countersunk surface with a central recess, and setting the upper surface of the limiting part as a conical surface that mates with the lower end face of the perforated magnet, the installation direction of the perforated magnet can be quickly determined, making it convenient and efficient. By setting the magnetic pole direction of the perforated magnet, the magnetic pole direction of the magnet is determined, ensuring the consistency of magnet polarity within the same batch of products. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the magnetic steel bracket adhesive fixing fixture according to an embodiment of the present utility model; Figure 2 This is a cross-sectional view of the pressure-holding rod assembly according to an embodiment of the present utility model; Figure 3 This is a partial exploded structural diagram of the magnetic steel bracket adhesive fixing fixture according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the lower structure of the placement plate according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the magnetic steel bracket adhesive fixing fixture after stacking according to an embodiment of this utility model. Detailed Implementation
[0015] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented under the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.
[0016] like Figures 1 to 5 As shown in the figure, this utility model embodiment provides a magnetic steel bracket adhesive fixing fixture, including a placement plate 1. Several patches 2 are fixed on the upper side of the placement plate 1. The figure shows six patches 2, but this is not limited to these and can be varied according to actual conditions. Each patch 2 has a magnetic steel bracket 3 on its upper side, and the upper side of the magnetic steel bracket 3 is bonded and fixed to a magnet 4. The structure of the magnetic steel bracket 3 and the magnet 4 is the same as in the prior art. Specifically, the middle part of the magnetic steel bracket 3 protrudes downward and has a groove. The magnet 4 is bonded and fixed in this groove. The two sides of the magnetic steel bracket 3 have mounting portions opposite each other, and the mounting portions have fixing holes 31 for mounting and fixing the magnetic steel bracket 3. The patches 2 are preferably made of ferrous material, thereby generating a magnetic attraction between the magnet 4 and the patches 2, so that the magnet 4 and the magnetic steel bracket 3 are attracted to the patches 2. A pressure-holding rod assembly 5 is also provided on the upper side of the magnet 4. The pressure-holding rod assembly 5 is used to increase the pressure between the magnet 4 and the magnetic steel bracket 3, thereby improving the bonding effect between the magnet 4 and the magnetic steel bracket 3.
[0017] The pressure-holding rod assembly 5 of this embodiment includes a rod body 51. A limiting part 52 is provided at the lower end of the rod body 51. A perforated magnet 53 is sleeved on the upper side of the limiting part 52. The outer diameter of the limiting part 52 is larger than the diameter of the hole in the middle of the perforated magnet 53, thus preventing it from falling off the lower end of the rod body 51. The perforated magnet 53 and the magnet 4 have opposite polarities on their opposite sides, thereby generating an attractive magnetic force between them. A fixing nut 54 is threaded onto the rod body 51 to fix the perforated magnet 53 to the lower end of the rod body 51. To facilitate fixing the perforated magnet 53, a sleeve 55 is preferably provided between the fixing nut 54 and the perforated magnet 53. The sleeve 55 is sleeved on the outside of the rod body 51. Providing the sleeve 55 significantly shortens the tightening stroke of the fixing nut 54.
[0018] Preferably, the lower end face of the perforated magnet 53 is set as a conical countersunk surface with a central recess, and the upper surface of the limiting part 52 is set as a conical surface that mates with the lower end face of the perforated magnet 53, which allows for quick confirmation of the installation direction of the perforated magnet 53. Furthermore, setting the conical countersunk surface on the side of the perforated magnet 53 with the same polarity ensures that the installed directions of the magnets 4 are consistent. For example, if the N pole of the perforated magnet 53 is set as a conical countersunk surface, when the magnet 4 is later picked up by the pressure-holding rod assembly 5 and placed into the groove on the magnet bracket 3, it ensures that the S pole of the magnet 4 is facing outwards. After subsequent installation on the speed wheel sensor, all the magnets 4 on the speed wheel sensor will be in the same direction. It should be noted that the N pole of the perforated magnet 53 is not limited to being set as a conical countersunk surface; it can be set as the S pole according to the requirements of the production product. Generally, the polarity of the magnets 4 on the same batch of speed wheels is consistent.
[0019] To facilitate fixing the patch 2, a positioning groove 11 is preferably provided on the upper side of the placement plate 1, and the patch 2 is embedded in the positioning groove 11. Multiple fixing screws 6 can be provided on the outer side of the positioning groove 11 to fix the patch 2 in the positioning groove 11. The figure shows four screws 6 on the outer side of each positioning groove 11, but this is not limited to this and can be varied according to actual conditions. It should be noted that since the middle part of the magnet bracket 3 protrudes downwards, and when the middle part of the magnet bracket 3 abuts against the patch 2, the outer periphery of the magnet bracket 3 will not contact the screws 6.
[0020] To facilitate stacking, it is preferable to have multiple positioning posts 12 on the upper side of the placement plate 1, preferably four positioning posts 12, located at the four corners of the placement plate 1. Slots 13 are provided on the lower side of the placement plate 1, the positions and dimensions of which are adapted to the positioning posts 12. This allows the positioning posts 12 on the lower side of the placement plate 1 to be inserted into the slots 13 on the upper side of the placement plate 1, so that after stacking, as shown... Figure 5 As shown.
[0021] During assembly, the perforated magnet 53 is first fitted onto the rod 51, with the conical countersunk surface of the perforated magnet 53 fitting against the upper surface of the limiting part 52. The sleeve 55 is then fitted onto the outside of the rod 51 and locked with the fixing nut 54. Next, the patch 2 is placed into the positioning groove 11 of the placement plate 1, and the patch 2 is fixed to the placement plate 1 as a whole with the fixing screws 6. During production, the pressure-holding rod assembly 5 picks up the magnet 4 and places it into the groove of the magnet bracket 3. After dispensing, the pressure-holding rod assembly 5, the magnet 4, and the magnet bracket 3 are placed together on the patch 2. Under the magnetic force of the magnet 4 and the perforated magnet 53, they will adhere to the patch 2, and a certain pressure will be generated between the magnet 4 and the magnet bracket 3 to ensure the bonding effect. After all the pressure-holding rod assemblies 5, magnets 4, and magnet brackets 3 are placed on the patch 2, align and insert the slot 13 on the lower side of the placement plate 1 with the positioning post 12 on the upper side of the other placement plate 1 to complete the stacking. After the glue between the magnet brackets 3 and magnets 4 has solidified, separate the magnet brackets 3 and magnets 4 together from the patch 2 and pressure-holding rod assembly 5, and then install them onto the speed wheel sensor.
[0022] The above description is merely a preferred embodiment of this utility model. It should be noted that for those skilled in the art, other parts not specifically described are existing technology or common knowledge. Several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A magnetic steel bracket adhesive fixing fixture, characterized in that, The device includes a placement plate, on the upper side of which are fixed several patches. Each patch has a magnetic support on its upper side, and the upper side of the magnetic support is bonded to a magnet. A magnetic attraction is generated between the magnet and the patch, so that the magnet and the magnetic support are attracted to the patch. A pressure holding rod assembly is provided on the upper side of the magnet to increase the pressure between the magnet and the magnetic support.
2. The magnetic steel bracket adhesive fixing fixture according to claim 1, characterized in that, The pressure-holding rod assembly includes a rod body with a limiting part at the lower end of the rod body. A perforated magnet is sleeved on the upper side of the limiting part. The perforated magnet and the magnet opposite to each other have opposite polarities. A fixing nut is threaded onto the rod body to fix the perforated magnet to the lower end of the rod body.
3. The magnetic steel bracket adhesive fixing fixture according to claim 2, characterized in that, A sleeve is fitted on the outside of the rod between the fixing nut and the perforated magnet.
4. The magnetic steel bracket adhesive fixing fixture according to claim 2, characterized in that, The lower end face of the perforated magnet is a conical countersunk hole with a central recess, and the upper surface of the limiting part is a conical surface that mates with the lower end face of the perforated magnet.
5. The magnetic steel bracket adhesive fixing fixture according to claim 1, characterized in that, The upper side of the placement plate is provided with a positioning groove, and the patch is embedded in the positioning groove.
6. The magnetic steel bracket adhesive fixing fixture according to claim 5, characterized in that, The outer side of the positioning groove is provided with multiple fixing screws, which are used to fix the patch in the positioning groove.
7. The magnetic steel bracket adhesive fixing fixture according to claim 1, characterized in that, The upper side of the placement plate is provided with multiple positioning posts, and the lower side is provided with slots that cooperate with the positioning posts.