Tolerance extraction tool and use method thereof

Abstract

The invention discloses a tolerance extraction tool and a use method thereof, the tolerance extraction tool comprises a handle, one end of the handle is rotatably provided with a front lock hook through a front pin, and the other end of the handle is rotatably provided with a rear lock hook through a rear pin; the locking directions of the front lock hook and the rear lock hook are opposite; an elastic sheet for pushing the front lock hook to rotate towards the locking direction of the front lock hook is arranged on the lifting handle; a torsional spring for pushing the rear lock hook to rotate towards the locking direction of the rear lock hook is mounted on the rear pin; according to the invention, by using the deformation recovery capability of the elastic sheet, the elastic force provided by the elastic sheet is changed according to the pressing condition, so that relatively high tolerance capability can be provided for the printed board and the daughter card module.

Description

Technical Field

[0001] This invention relates to high-end embedded computing devices, specifically a tolerance puller and its usage method. Background Technology

[0002] High-end embedded computing devices are used in almost all applications with "extreme" requirements for computing performance, environmental adaptability, and system reliability. Especially in the defense and aerospace fields, pullers are a widely used key device. Their core function is to enable effective connection between various functional modules (which integrate a large number of precision components) and electrical connectors, as well as to facilitate rapid installation and disassembly. At the same time, after the functional modules are installed, they can provide stable preload to ensure the reliability of the connection between the functional modules and electrical connectors or motherboards, thereby ensuring the normal operation of the high-end embedded computing device as a whole. Currently, most traditional pullers used in the industry are lever-type structures. After the module is installed and locked, this type of puller applies a constant preload force to the module. However, this characteristic leads to significant tolerance limitations in practical applications. Specifically, regardless of the gap between the functional module and the electrical connector or motherboard, the lever-type puller can only provide a fixed preload force. When the gap between the module and the electrical connector or motherboard is slightly larger, the fixed preload force cannot effectively compensate for the gap, easily causing the module to loosen. This not only affects the normal operation of related components in embedded computing devices but may also pose a potential threat to the overall security of the embedded computing device. Summary of the Invention

[0003] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides a tolerance puller and its usage method. By utilizing the restoring deformation capability of the spring, the elastic force provided by the spring changes according to the clamping condition, which can provide strong tolerance capability for functional modules (such as printed circuit boards and daughter card modules). The connection or pull-out of the method is carried out by pry bar, and the lever principle of the pull-out arm plays a role in saving effort during the pull-out process.

[0004] On one hand, the present invention provides a tolerance puller, including a handle, a front locking hook rotatably mounted at one end of the handle via a front pin, and a rear locking hook rotatably mounted at the other end via a rear pin; The front and rear locking hooks engage in opposite directions. A spring is provided on the handle to push the front locking hook to rotate in the locking direction; A torsion spring is installed on the rear pin to push the rear locking hook to rotate in its locking direction.

[0005] Preferably, the front locking hook has a limiting part, a driving part and an arc-shaped locking tongue part, the spring plate acts on the driving part, and the limiting part is connected to a limiting member installed on the handle.

[0006] Preferably, the limiting member is an elastic cylindrical pin installed on the handle.

[0007] Preferably, the spring includes a connecting portion and a protruding actuating portion, the actuating portion acting on the driving portion, and the connecting portion connected to the handle.

[0008] Preferably, the connecting part is folded at the end of the handle and inserted into a socket formed in the handle.

[0009] Preferably, the connecting portion has a plug portion that matches the socket.

[0010] Preferably, the rear locking hook has a driving groove, and more preferably, the driving groove is inclined.

[0011] Preferably, the position of the front locking hook on the front pin along the axial direction is adjustable.

[0012] On the other hand, the present invention also provides a method of using a tolerance puller, including a module locking method and a module pulling method; The module locking method is as follows: The front locking hook module is rotated and connected by the front pin, and the rear locking hook is disengaged from the module. Insert the module into the box and align it with the electrical connector fixed on the motherboard. At the same time, turn the handle to make the front locking hook contact the connection on the box. This connection can be a groove or a protrusion on the box. Using the contact point between the locking hook and the connection point as the fulcrum, press the handle continuously until the rear lock is locked onto the hook part of the module; The method for pulling out is as follows: First, rotate the rear locking hook to disengage it from the hook part. Then, rotate the handle in the opposite direction to disengage the front locking hook from the connector. Continue rotating the handle until the end of the handle contacts the box. Continue rotating until the module is pried off from the electrical connector. Then pull the handle to bring out the module.

[0013] The present invention has the following advantages: This invention is a tolerance puller. By utilizing the restoring deformation capability of the spring sheet, and the elastic force provided by the spring sheet changing according to the clamping condition, it can provide strong tolerance capability for printed circuit boards and daughter card modules. At the same time, a rear locking hook is installed at the other end of the handle through a torsion spring and a rear pin. The module can be installed and locked by using the opposite locking directions of the front and rear locking hooks, and the torsion spring provides the rear locking hook with locking capability.

[0014] The front locking hook can rotate on the front pin to adjust its position and the force position when the puller is locked, so as to ensure that it is aligned with the electrical connector. This ensures that the force point of the module is consistent with the electrical connector when locking and pulling, thus guaranteeing the service life of the module and its connector.

[0015] The front locking hook has a limiting part, a driving part, and an arc-shaped locking tongue, enabling the front locking hook to connect to the chassis. The connection is made through the locking tongue, while the driving part contacts the spring plate to drive the front locking hook. The driving principle utilizes the compression of the spring plate by the driving part; the spring plate, during its recovery deformation, pushes the driving part, thus achieving actuation. The limiting part, in conjunction with the limiting component, restricts the rotation range of the front locking hook, improving stability. The limiting component, made of a flexible cylindrical pin, provides a buffering effect during contact with the limiting part. This is because during locking, there may be impacts between the limiting part and the limiting component, which generate noise and, with repeated impacts, affect the lifespan of the front locking hook. The flexible cylindrical pin solves this problem.

[0016] When the puller described in this invention is locked, the spring clip remains in close contact with the front locking hook, providing a continuous force so that the module and the electrical connector or motherboard mold always have a certain force acting on them. This can eliminate errors caused by the manufacturing, processing, and assembly of structural components and PCB circuit boards; at the same time, it can ensure the connection reliability of the equipment in harsh environments, such as vibration and impact. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the tolerance puller described in this invention; Figure 2 This is a three-dimensional schematic diagram of the tolerance puller described in this invention from another perspective; Figure 3 This is a schematic diagram of the main view of the tolerance puller described in this invention; Figure 4 This is a top view schematic diagram of the tolerance puller described in this invention; Figure 5 yes Figure 4 Schematic diagram of the cross section of AA; Figure 6 This is a diagram showing the usage status of the tolerance puller described in this invention; Figure 7 This is a three-dimensional schematic diagram of the front locking hook described in this invention; Figure 8 This is a three-dimensional schematic diagram of the spring sheet described in this invention; Figure 9 This is a schematic diagram showing the connection between the template and the motherboard via an electrical connector; Figure 10 This is a schematic diagram of the installation of the tolerance puller described in this invention; Figure 11 This is a schematic diagram of the installation of the tolerance puller described in this invention (module and housing separated). Figure 12 This is a schematic diagram of the installation of the tolerance puller described in this invention (module inserted into the housing). Figure 13 This is a schematic diagram of the installation of the tolerance puller described in this invention (the front locking hook is in contact with the connection part of the housing after the module is inserted into the housing). Figure 14 This is a schematic diagram of the locking state of the tolerance puller described in this invention; Figure 15 This is a schematic diagram showing the dimensions of the lifting and locking lever arms; Figure 16 This is a schematic diagram of the force planes. Plane M is the force plane between the electrical connector and the module, and plane N is the force plane between the front locking hook and the housing. In the diagram: 100, tolerance puller; 101, handle; 102, front locking hook; 1021, locking tongue; 1022, limiting part; 1023, driving part; 103, rear locking hook; 1031, driving groove; 104, torsion spring; 105, front pin; 106, spring; 1061, actuating part; 1062, connecting part; 1063, plug-in part; 107, limiting element; 108, rear pin; 200, chassis; 300, module; 301, hook part; 400, electrical connector; 500, motherboard. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0019] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0020] As described in the background section, most traditional pullers used in the industry are lever-type structures. After the module is installed and locked, this type of puller applies a constant preload force to the module. However, this characteristic leads to significant tolerance limitations in practical applications. Specifically, regardless of the gap between the functional module and the electrical connector or motherboard, the lever-type puller can only provide a fixed preload force. When the gap between the module and the electrical connector or motherboard is slightly larger, the fixed preload force cannot effectively compensate for the gap, easily causing the module to loosen. This not only affects the normal operation of related components in aviation equipment but may also pose a potential threat to the overall safety of the aviation equipment.

[0021] For the reasons mentioned above, such as Figures 1-7 As shown, this embodiment provides a tolerance puller 100, including a handle 101. A front locking hook 102 is rotatably mounted on one end of the handle via a front pin 105, and a rear locking hook 103 is rotatably mounted on the other end via a rear pin 108. For example, grooves are provided at both ends of the handle, and the front locking hook and the rear locking hook are installed in the grooves. The front locking hook 102 and the rear locking hook 103 engage in opposite directions, such as Figure 5 As shown, the dashed line with the arrow indicates the locking direction; A spring piece 106 is provided on the handle 101 to push the front locking hook 102 to rotate in its locking direction; A torsion spring 104 is installed on the rear pin 108 to push the rear locking hook 103 to rotate in its locking direction.

[0022] The aforementioned technical features utilize the restorative deformation capability of the spring sheet, and the elastic force provided by the spring sheet varies according to the clamping condition, which can provide strong tolerance capability for printed circuit boards and daughter card modules; at the same time, a rear locking hook is installed at the other end of the handle through a torsion spring and a rear pin, and the module is installed and locked by using the opposite locking directions of the front locking hook and the rear locking hook, while the torsion spring provides the rear locking hook with locking capability.

[0023] When using, such as Figure 6 and Figures 9-14 As shown, the tolerance puller 100 is rotatably mounted on the module 300 via a front pin, and the front locking hook is engaged with the fastening point of the chassis 200 (e.g., Figure 13 (As shown) Then the lock hook is attached to the hook portion 301 opened on the module. The hook portion 301 is opened on both the upper and lower parts of the module.

[0024] To achieve better contact between the front locking hook and the module or chassis, such as Figure 7As shown, in one embodiment, the front locking hook 102 has a limiting portion 1022, a driving portion 1023, and an arc-shaped locking tongue portion 1021. The spring plate acts on the driving portion, and the limiting portion interacts with the limiting member 107 (e.g., mounted on the handle) installed on the handle. Figure 5 (As shown). Preferably, the limiting member is a resilient cylindrical pin installed on the handle.

[0025] The aforementioned technical features enable the front locking hook to connect to the chassis via the locking tongue. The drive unit contacts the spring plate to actuate the front locking hook. The driving principle involves the drive unit compressing the spring plate; the spring plate, during its recovery deformation, pushes the drive unit, thus achieving actuation. The included limiting part, in conjunction with the limiting component, restricts the rotation range of the front locking hook, improving stability. The limiting component, a flexible cylindrical pin, provides a buffering effect during contact with the limiting part. This is because during locking, there may be impacts between the limiting part and the limiting component, which generate noise and, with repeated impacts, affect the lifespan of the front locking hook. The flexible cylindrical pin effectively solves this problem.

[0026] To facilitate the installation of the spring and ensure better contact between the spring and the drive unit, such as Figure 8 As shown, in one embodiment, the spring 106 includes a connecting portion 1062 and a protruding actuating portion 1061, the actuating portion acting on the driving portion, and the connecting portion being connected to the handle.

[0027] The connecting part is folded at the end of the handle and inserted into the socket opened in the handle.

[0028] The connecting part has a plug portion 1063 that matches the socket.

[0029] The aforementioned technical features enable a better fit between the spring and the drive unit, and the protruding action part enhances the effect of the spring on the drive unit. The protruding action part is easier to press, thus generating a reaction force. The spring can be installed by folding and detouring the connecting part and inserting it into the socket. Installation can be achieved without using other parts, and the insertion part allows insertion into the socket, improving the stability of the spring installation.

[0030] To facilitate the operation of the rear locking hook, in one embodiment, such as Figure 1 As shown in Figure 5, the rear lock hook has a driving groove 1031, preferably, the driving groove is inclined. The inclined driving groove allows workers to easily insert tools (such as pry bars) into the driving groove to operate the rear lock hook.

[0031] To make the insertion and removal process more effortless, in one embodiment, the position of the front locking hook on the front pin along the axial direction is adjustable. This is achieved by making the thickness of the front locking hook less than the width of the groove at the end of the handle for mounting the front locking hook, thereby allowing the front locking hook to be adjusted along the axis of the front pin. This positional adjustment allows for adjustment of the force point where the front locking hook contacts the housing, adapting to different positions of the electrical connector (because the electrical connector may be located at the edge of the motherboard, such as...). Figure 9 As shown, it's also possible that, in the middle, if the force-bearing contact point between the front locking hook and the housing is not on the same plane as the connection point of the electrical connector, misalignment will occur, and shearing force will be applied during insertion and removal. Figure 16 As shown, plane M is the force-bearing plane of the electrical connector and module, and plane N is the force-bearing plane of the front locking hook and housing. When plane M and plane N are coplanar, insertion and removal require less effort. Furthermore, by adjusting the position of the front locking hook along the axial direction on the front pin, plane M and plane N can remain coplanar even after the electrical connector's position changes. This allows the front locking hook to be aligned with the electrical connector at the rear of the module. If the adjustment distance of the front locking hook relative to the front pin's axial direction is insufficient, the position of the puller on the module can be adjusted further. By ensuring that their force-bearing planes are on the same plane, the insertion and removal process becomes more effortless and better protects the connector.

[0032] In another embodiment, a method of using a tolerance puller is provided, such as... Figures 10-14 As shown, the method includes a module locking method and a module pulling method, wherein the locking lever arm ratio is 13:1; the pulling lever arm ratio is 8:1 (exemplary, specific). Figure 15 (as shown) The module locking method is as follows: The front locking hook module is rotated and connected by the front pin, and the rear locking hook is disengaged from the module. Insert the module into the box and align it with the electrical connector fixed on the motherboard. At the same time, turn the handle to make the front locking hook contact the connection on the box. This connection can be a groove or a protrusion on the box. Using the contact point between the locking hook and the connection point as the fulcrum, press the handle continuously until the rear lock is locked onto the hook part of the module; The method for pulling out is as follows: First, rotate the rear locking hook to disengage it from the hook part. Then, rotate the handle in the opposite direction to disengage the front locking hook from the connector. Continue rotating the handle until the end of the handle contacts the box. Continue rotating until the module is pried off from the electrical connector. Then pull the handle to bring out the module.

[0033] The connection or removal of the above methods are all done by pry bar. The lever principle of the lifting arm makes the lifting process less strenuous. The spring plate has the ability to recover its deformation. The elastic force provided by the spring plate changes according to the clamping condition, which can provide strong tolerance for modules (such as printed circuit boards and daughter card modules).

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tolerance-tolerant puller, comprising a handle, characterized in that: A front locking hook is mounted on one end of the handle by rotating via a front pin, and a rear locking hook is mounted on the other end by rotating via a rear pin; The front and rear locking hooks engage in opposite directions. A spring is provided on the handle to push the front locking hook to rotate in the locking direction; A torsion spring is installed on the rear pin to push the rear locking hook to rotate in its locking direction.

2. The tolerance puller according to claim 1, characterized in that: The front locking hook has a limiting part, a driving part and an arc-shaped locking tongue part. The spring acts on the driving part, and the limiting part is connected to a limiting member installed on the handle.

3. The tolerance puller according to claim 2, characterized in that: The limiting component is an elastic cylindrical pin installed on the handle.

4. The tolerance puller according to claim 2, characterized in that: The spring includes a connecting part and a protruding actuating part, the actuating part acting on the driving part, and the connecting part connected to the handle.

5. The tolerance puller according to claim 4, characterized in that: The connecting part is folded at the end of the handle and inserted into the socket opened in the handle.

6. The tolerance puller according to claim 5, characterized in that: The connecting part has a plug portion that matches the socket.

7. The tolerance puller according to claim 1, characterized in that: The rear locking hook has a driving groove.

8. The tolerance puller according to claim 7, characterized in that: The drive groove is set at an angle.

9. The tolerance puller according to claim 1, characterized in that: The position of the front locking hook on the front pin along the axial direction is adjustable.

10. A method of using a tolerance puller as described in any one of claims 1-9, characterized in that, This includes module locking methods and module unloading methods; The module locking method is as follows: The front locking hook module is rotated and connected by the front pin, and the rear locking hook is disengaged from the module. Insert the module into the box, aligning it with the electrical connector fixed to the motherboard, and simultaneously turn the handle to make the front locking hook contact the connection point on the box. Using the contact point between the locking hook and the connection point as the fulcrum, press the handle continuously until the rear lock is locked onto the hook part of the module; The method for pulling out is as follows: First, rotate the rear locking hook to disengage it from the hook part. Then, rotate the handle in the opposite direction to disengage the front locking hook from the connector. Continue rotating the handle until the end of the handle contacts the box. Continue rotating until the module is pried off from the electrical connector. Then pull the handle to bring out the module.

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