Electronic component pressing plate and electrical equipment
By adopting the design of the metal ring and the connecting hole limit matching design in the electronic component pressure plate, the torque attenuation problem caused by the difference in the expansion coefficient of the material is solved, and a more stable fixing effect is achieved.
Patent Information
- Application Number
- CN202420745767.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-04-11
AI Technical Summary
During the long-term use of existing electronic component pressure plates, due to the difference in material expansion coefficient, the gap between the bolt head and the pressure plate increases, resulting in torque attenuation and unfixed fixation.
A press plate for electronic components is designed, using a metal ring to cooperate with the connecting hole to ensure that the bolts pass through the metal ring to install the press plate. The limiting parts of the metal ring are connected in the axial and circumferential directions to avoid loosening.
By synchronously expanding metal rings and bolts, loosening problems caused by expansion differences are avoided, torque attenuation of the bolts is reduced, and tightening stability is ensured.
Smart Images
Figure CN222827462U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electrical equipment, and in particular to an electronic component pressing plate and electrical equipment. Background Art
[0002] When the existing electronic component pressing plate is used, the bolts pass through the through holes on the pressing plate and are tightened and fixed with the bolt holes on the fixing plate, and the bolt heads abut against the pressing plate to clamp the pressing plate between the bolt heads and the fixing plate. The end of the pressing plate away from the bolts presses the electronic component.
[0003] When the electronic device is working, the temperature rises, which will cause the pressure plate and bolts to expand due to heat. The pressure plate is made of plastic and the bolt is made of metal. The expansion coefficient of plastic is greater than that of metal, and the expansion length of the pressure plate in the thickness direction is greater than that of the bolt. Therefore, after a long period of thermal expansion and contraction, the bolt will be gradually lifted by the pressure plate that expands due to heat. Finally, at room temperature, the gap between the bolt head and the pressure plate increases, causing the torque of the pressure plate to decay. Utility Model Content
[0004] One of the purposes of the present application is to provide an electronic component pressing plate that can solve at least one of the defects in the above-mentioned background technology.
[0005] Another object of the present application is to provide an electrical device that can solve at least one of the defects in the above-mentioned background technology.
[0006] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: an electronic component pressure plate, including a pressure plate body and a metal ring; the pressure plate body is provided with a connecting hole for bolt fixing, and the metal ring is arranged in the connecting hole, so that the bolt passes through the metal ring to install the pressure plate body.
[0007] Preferably, a first limiting portion is provided on the outer side of the metal ring, and the metal ring is connected to the connecting hole in an axial direction by limiting the first limiting portion.
[0008] Preferably, the first limiting portion includes at least one radially protruding limiting ring, and a plurality of the limiting rings are arranged at intervals along the axial direction.
[0009] Preferably, the first limiting portion includes at least one radially inwardly concave limiting groove, and a plurality of the limiting grooves are spaced apart in the axial direction.
[0010] Preferably, a second limiting portion is provided on the outer side of the metal ring, and the metal ring is connected to the connecting hole in a limiting manner along the circumferential direction via the second limiting portion.
[0011] Preferably, at least one of the second limiting portions is provided along the circumferential direction, and the second limiting portion is convex or concave.
[0012] Preferably, there are a plurality of the second limiting portions, and the second limiting portions are evenly distributed along the circumferential direction to form a toothed segment or a wave segment.
[0013] Preferably, the second limiting portion is arranged on the outer side of the limiting ring.
[0014] Preferably, a first end of the metal ring along the bolt insertion direction is provided with a supporting portion higher than the end surface of the connecting hole.
[0015] An electrical device comprises the electronic component pressing plate mentioned above.
[0016] Compared with the prior art, the beneficial effects of this application are:
[0017] When the ambient temperature rises, the temperature of the pressure plate body rises, and the temperature of the metal ring and bolt also rises synchronously. Since the metal ring and the bolt are both made of metal, the expansion coefficient is basically the same, so the axial length changes of the metal ring and the bolt are basically the same. Therefore, the bolt is not easily pushed out by the lengthening of the metal ring and caused to loosen, which can reduce the torque attenuation of the bolt to ensure tightening. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the axial structure of the electronic component pressing plate in the utility model.
[0019] Figure 2 This is a schematic diagram of the axial structure of Example 1 of the metal ring in the utility model.
[0020] Figure 3 It is a schematic structural diagram of Example 2 of the metal ring in the present invention when viewed from above.
[0021] Figure 4 It is a partial structural schematic diagram of one example of the matching connection between the metal ring and the connecting hole in the utility model.
[0022] Figure 5 This is a schematic structural diagram of Example 3 of the metal ring in the present invention when viewed from the front.
[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of Example 4 of the metal ring in the present invention when viewed from above.
[0024] Figure 7 It is a partial structural schematic diagram of another example of the matching connection between the metal ring and the connecting hole in the utility model.
[0025] In the figure: a pressing plate body 100 , a connecting hole 110 , a protective sleeve 111 , a metal ring 2 , a limiting ring 21 , a toothed segment 211 , a supporting portion 22 , a limiting groove 23 , and a bolt 300 . DETAILED DESCRIPTION
[0026] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0027] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.
[0028] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
[0029] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.
[0030] One aspect of the present application provides an electronic component pressing plate, such as Figure 1 , Figure 4 and Figure 7 As shown, one of the preferred embodiments includes a pressure plate body 100 and a metal ring 2. The pressure plate body 100 is provided with a connection hole 110 for fixing the bolt 300, and the metal ring 2 is arranged in the connection hole 110, so that the bolt 300 passes through the metal ring 2 to thread and screw the pressure plate body 100 with the fixing component (not shown). Therefore, when the ambient temperature rises, the temperature of the pressure plate body 100, the metal ring 2 and the bolt 300 will also rise synchronously; since the metal ring 2 and the bolt 300 are both metals, the thermal expansion coefficients are not much different, which makes the axial length changes of the metal ring 2 and the bolt 300 after heating basically the same, so the bolt 300 is not easily pushed out by the lengthening of the metal ring 2 and caused to loosen, and the torque attenuation of the bolt 300 can be reduced to ensure tightening.
[0031] It should be known that the pressure plate body 100 is generally made of plastic; the materials of the metal ring 2 and the bolt 300 can be the same, such as both are made of steel; the materials of the metal ring 2 and the bolt 300 can be different, such as the bolt 300 is made of steel and the metal ring 2 is made of copper or other materials with a similar expansion coefficient to that of steel.
[0032] It should also be known that, since the metal ring 2 and the connecting hole 110 are limited in the vertical direction, the radial dimension of the metal ring 2 extending in the axial direction is not uniform, and the corresponding side wall of the connecting hole 110 will also adapt to the outer dimension of the metal ring 2. Therefore, it is difficult or impossible to install the metal ring 2 after the connecting hole 110 is formed, so in this embodiment, the connection between the metal ring 2 and the connecting hole 110 of the pressure plate body 100 can be achieved by one-piece injection molding. The one-piece injection molding method is a well-known technology for those skilled in the art, so it will not be elaborated in detail here.
[0033] From the foregoing, it can be seen that due to the large difference in expansion coefficients between the plastic pressure plate body 100 and the metal ring 2, when the ambient temperature rises, a large gap may be generated between the connecting hole 110 of the pressure plate body 100 and the metal ring 2 after expansion; this may cause axial loosening and misalignment between the metal ring 2 and the connecting hole 110.
[0034] In this embodiment, in order to ensure the stability of the connection between the metal ring 2 and the connecting hole 110 after thermal expansion, Figures 2 to 7 As shown, a first limiting portion is provided on the outer side of the metal ring 2, and the metal ring 2 is connected to the connecting hole 110 in a limiting manner along the axial direction through the first limiting portion.
[0035] It should be known that there are many specific structures of the first limiting portion, including but not limited to the following two.
[0036] The first type: Figures 2 to 4 As shown, the first limiting portion is a protruding structure; the first limiting portion includes at least one limiting ring 21 that is protrudingly arranged along the radial direction of the metal ring 2. That is, the radial dimension corresponding to the limiting ring 21 is larger than the basic dimension of the metal ring 2. In terms of parameters, Figure 3 As shown, the basic size of the metal ring 2, that is, the nominal diameter D is smaller than the diameter D1 of the limiting ring 21; for example, D1 can be taken as 1.1D~1.5D; the specific value can be selected according to actual needs.
[0037] Specifically, Figure 2 As shown, the limiting ring 21 can be a full-circle ring structure along the circumferential direction. The limiting ring 21 can also be a circular arc segment structure along the circumferential direction; there can be multiple limiting rings 21 in the same axial position in the form of circular arc segments. Figure 3As shown, the number of the limiting rings 21 in the same axial position in the form of arc segments is 6, and the 6 limiting rings 21 are arranged at equal intervals along the circumferential direction, thereby ensuring that the limiting rings 21 and the connecting holes 110 are subjected to stable axial forces.
[0038] At the same time, if Figure 4 As shown, the number of the limiting ring 21 can be one or a group; if the limiting ring 21 is a full ring structure, it can be one; if the limiting ring 21 is an arc segment, a plurality of limiting rings 21 uniformly distributed along the circumferential direction at the same axial position are a group. Figure 2 As shown, the limiting rings 21 may also be multiple or in groups.
[0039] If the number of the limiting ring 21 is one or a group, such as Figure 4 As shown, the limiting ring 21 is arranged in the middle area of the metal ring 2. If the number of the limiting rings 21 is multiple or multiple groups, for example Figure 2 As shown, there are two limit rings 21 , which are spaced apart along the axial direction of the metal ring 2 , and are close to two end positions of the metal ring 2 , respectively.
[0040] The second type: Figures 5 to 7 As shown, the first limiting portion is a concave structure; the first limiting portion includes at least one limiting groove 23 which is concave in the radial direction of the metal ring 2. That is, the radial dimension corresponding to the limiting groove 23 is smaller than the basic dimension of the metal ring 2. In terms of parameters, Figure 5 and Figure 6 As shown, the basic size of the metal ring 2, that is, the nominal diameter D is larger than the bottom diameter D2 of the limiting groove 23; for example, D2 can be taken as 0.6D~0.9D; the specific value can be selected according to actual needs.
[0041] Specifically, Figure 5 As shown, the limiting groove 23 can be a full-circle ring structure along the circumferential direction. Figure 6 As shown, the limiting groove 23 can also be a circular arc segment structure along the circumferential direction. Generally speaking, there are multiple limiting grooves 23 in the same axial position in the form of circular arc segments, for example Figure 6 As shown, there are six limiting grooves 23 in the form of arc segments at the same axial position, and the six limiting grooves 23 are arranged at equal intervals along the circumferential direction, thereby ensuring that the limiting grooves 23 and the connecting holes 110 are subjected to stable axial forces.
[0042] At the same time, if Figure 7As shown, the number of the limiting groove 23 can be one or a group; if the limiting groove 23 is a full-circle ring structure, the number of the limiting groove 23 is one; if the limiting groove 23 is a circular arc groove structure, a plurality of limiting grooves 23 uniformly distributed along the circumferential direction at the same axial position are a group. Of course, as shown in the figure, the number of the limiting grooves 23 can also be multiple or multiple groups, and multiple limiting grooves 23 or multiple groups of limiting grooves 23 are arranged at intervals along the axial direction of the metal ring 2.
[0043] If the number of the limiting groove 23 is one, such as Figure 7 As shown, the limiting groove 23 is arranged in the middle area of the metal ring 2. If there are multiple limiting grooves 23, such as two, the two limiting grooves 23 are spaced apart along the axial direction of the metal ring 2, and the two limiting grooves 23 can be close to the two ends of the metal ring 2.
[0044] It should be known that since the metal ring 2 and the pressure plate body 100 are injection molded, generally there will be no misalignment, so when it is determined that they are firmly fixed, the side of the metal ring 2 can be a conventional cylindrical side. However, in order to further ensure that the connection between the metal ring 2 and the connecting hole 110 in the circumferential direction is stable after thermal expansion, the metal ring 2 and the connecting hole 110 can be limited in the circumferential direction.
[0045] In this embodiment, Figures 2 to 7 As shown, a second limiting portion is provided on the outer side of the metal ring 2, and the metal ring 2 is connected to the connecting hole 110 in a limiting manner along the circumferential direction through the second limiting portion.
[0046] Specifically, at least one second limiting portion is provided along the circumferential direction, and the second limiting portion is convex or concave, that is, the second limiting portion is block-shaped or groove-shaped, and the metal ring 2 is limited in the circumferential direction relative to the connecting hole 110 by engaging the second limiting portion with the connecting hole 110 after injection molding.
[0047] It should be known that the second limiting portion may be arranged in a region of the metal ring 2 outside the first limiting portion; the second limiting portion may also be arranged outside the first limiting portion.
[0048] More specifically, if the second limiting portion is disposed on the first limiting portion, for example Figure 2 As shown, the second limiting portion may be a protruding structure disposed outside the limiting ring 21 of the entire ring; for example Figure 3 As shown, among the plurality of limiting rings 21 in the arc segment structure, a second limiting portion with a concave structure may be formed between two adjacent limiting rings 21 along the circumferential direction; for example Figure 6 As shown, the plurality of limiting grooves 23 in the arc segment structure can also form a concave second limiting portion. If the second limiting portion is arranged on the metal ring 2 in an area other than the first limiting portion, for example Figure 5 and Figure 7As shown, the second limiting portion is arranged on the area of the metal ring 2 other than the limiting groove 23 and is arranged in a convex or concave manner.
[0049] In this embodiment, in order to improve the limiting stability of the second limiting portion on the metal ring 2 along the circumferential direction of the connecting hole 110. Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, there are multiple second limiting parts, and the multiple second limiting parts are evenly distributed along the circumferential direction. Figure 2 and Figure 5 As shown, a plurality of second limiting portions evenly distributed along the circumferential direction may form a toothed segment 211 or a wave segment.
[0050] In this embodiment, Figure 2 , Figure 4 , Figure 5 and Figure 7 As shown, the first end of the metal ring 2 along the direction of insertion of the bolt 300 is provided with a support portion 22 that is higher than the end surface of the connection hole 110. Therefore, when the pressing plate body 100 is fixedly installed, the head of the bolt 300 will abut against the end surface of the support portion 22, so that there is a gap between the head of the bolt 300 and the end surface of the connection hole 110. Furthermore, when the pressing plate body 100 is heated and expanded, the expanded pressing plate body 100 can be prevented from contacting the bolt 300 through the end surface of the connection hole 110.
[0051] It should be known that if Figure 4 and Figure 7 As shown, after the metal ring 2 is integrally injection molded with the connecting hole 110 , the height t of the supporting portion 22 above the end surface of the connecting hole 110 can be selected according to actual needs.
[0052] In this embodiment, Figure 1 As shown, the platen body 100 is provided with a protective sleeve 111 at the end surface of the connecting hole 110, and the protective sleeve 111 is integrally formed with the platen body 100. When installing the platen body 100, the bolt 300 can extend into the protective sleeve 111, and then pass through the inner hole of the metal ring 2 to fix and install the platen body 100. The provision of the protective sleeve 111 can prevent the head of the bolt 300 from being accidentally hit during the use of the platen body 100.
[0053] Another aspect of the present application provides an electrical device, wherein a preferred embodiment thereof includes the above-mentioned electronic component pressing plate.
[0054] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.
Claims
1. An electronic component pressing plate, characterized in that: It comprises a pressing plate body and a metal ring; the pressing plate body is provided with a connecting hole for bolt fixing, the metal ring is arranged in the connecting hole, and the bolts are passed through the metal ring to install the pressing plate body.
2. The electronic component pressing plate according to claim 1, characterized in that: A first limiting portion is disposed on the outer side of the metal ring, and the metal ring is connected to the connecting hole in a limiting manner along the axial direction through the first limiting portion.
3. The electronic component pressing plate according to claim 2, characterized in that: The first limiting portion includes at least one radially protruding limiting ring, and a plurality of the limiting rings are spaced apart in the axial direction.
4. The electronic component pressing plate according to claim 2, characterized in that: The first limiting portion includes at least one radially inwardly concave limiting groove, and a plurality of the limiting grooves are spaced apart along the axial direction.
5. The electronic component pressing plate according to claim 3, characterized in that: A second limiting portion is disposed on the outer side of the metal ring, and the metal ring is connected to the connecting hole in a limiting manner along the circumferential direction via the second limiting portion.
6. The electronic component pressing plate according to claim 5, characterized in that: At least one second limiting portion is provided along the circumferential direction, and the second limiting portion is provided in a convex or concave manner.
7. The electronic component pressing plate according to claim 6, characterized in that: There are a plurality of the second limiting portions, and the second limiting portions are evenly distributed along the circumferential direction to form a toothed segment or a wave segment.
8. The electronic component pressing plate according to claim 5, characterized in that: The second limiting portion is arranged on the outer side of the limiting ring.
9. The electronic component pressing plate according to any one of claims 1 to 8, characterized in that: A first end of the metal ring along the bolt insertion direction is provided with a supporting portion higher than the end surface of the connecting hole.
10. An electrical device, characterized in that: The electronic component pressing plate comprises the electronic component pressing plate as described in any one of claims 1 to 9.