Three-stage amplification extractor

Abstract

The application is suitable for the technical field of puller, and provides a three-stage amplification puller, which comprises a shell assembly, a clamping member, a transmission assembly and an operating assembly, the shell assembly comprises a first shell and a second shell, the first shell and the second shell are buckled to each other to form a containing cavity, two adjacent sides of the containing cavity are provided with a first opening and a second opening, the clamping member is rotationally connected to the first shell, one end of the clamping member is provided with a clamping nozzle, the clamping nozzle at least partially extends out of the first opening, the transmission assembly is rotationally connected to the first shell and comprises a transfer gear, a transmission gear and a driving rack which are successively externally meshed, the transfer gear is rotationally connected to the clamping member, and the operating assembly comprises a pull ring which is fixedly connected with the driving rack, a driving force is applied to the pull ring to drive the driving rack to move linearly, so that the driving force is transmitted to the clamping nozzle after three-stage amplification and is output, thereby achieving smooth insertion or extraction of the case relative to the rack and significantly reducing the operation force of the operator.

Description

Technical Field

[0001] This invention relates to the field of server and pull-out aid technology, and in particular to a three-stage amplification pull-out aid. Background Technology

[0002] With the rapid development of big data, cloud computing, and artificial intelligence technologies, the number of integrated mechanical components and liquid cooling modules in functional modules such as servers and switches is increasing, leading to a significant increase in the back-pushing force of the rack on the functional modules. At the same time, the reserved space inside the chassis and around the panel is extremely compressed. As a key operating component for enabling the convenient pushing and pulling of functional modules relative to the rack, pull-out aids are widely used in the above-mentioned equipment. However, the layout of traditional pull-out aids in a confined space has become extremely difficult, and it is difficult to provide sufficient mechanical advantages to overcome the increasing insertion and extraction forces. As a result, existing equipment often faces the risk of malfunction or even damage when facing high-load insertion and extraction scenarios.

[0003] Currently, some push-pull handle products are available on the market, which provide assistance to operators through transmission mechanisms such as levers or gears, improving the convenience of insertion and removal operations to some extent. However, existing pull-pull handles generally have the following shortcomings: On the one hand, the existing pull-pull devices have relatively complex structures and a large number of parts, resulting in a large product size that is difficult to adapt to increasingly compact chassis spaces. On the other hand, the existing pull-pull devices have limited transmission stages or unreasonable force-saving ratio designs, resulting in low transmission efficiency and high operating force, making it difficult to simultaneously meet the needs of high-intensity and labor-saving operations within limited spaces. In addition, the installation process of some products is cumbersome, requiring the use of special tools, which is inconvenient for quick on-site maintenance and replacement. Therefore, there is an urgent need in this field for a pull-pull device with a simple and compact structure, significant labor-saving effect, and convenient installation to better meet the current application needs of the market. Summary of the Invention

[0004] The purpose of this invention is to provide a three-stage amplification pull-out aid, which aims to solve the technical problem that existing pull-out aids have complex structures and are difficult to operate with high magnification and effort in a confined space.

[0005] In a first aspect, the present invention provides a three-stage amplification pull-out aid for assisting the chassis to be pushed into the frame in the insertion direction or pulled out of the frame in the extraction direction. The three-stage amplification pull-out aid includes a housing assembly, a holding component, a transmission assembly, and an operating assembly. The housing assembly includes a first housing and a second housing, which are fastened together to form a receiving cavity. The receiving cavity has a first opening and a second opening on adjacent sides. The holding member, the transmission assembly, and the operating assembly are housed within the receiving cavity. The clamping member is rotatably connected to the first housing. One end of the clamping member is provided with a latch, which at least partially extends out of the first opening for engaging with a retainer fixed on the frame. The transmission assembly is rotatably connected to the first housing and includes a transition gear, a transmission gear, and a drive rack that mesh externally in sequence. The transition gear is rotatably connected to the holding member, and the drive rack is fixed above the accommodating cavity. The operating component is disposed on one side of the transmission component and includes a pull ring fixedly connected to the drive rack; When performing insertion and extraction operations using the three-stage amplification and extraction aid, the operator applies a driving force to the pull ring, causing the drive rack to move linearly along its length. The drive rack drives the transmission gear to rotate, which in turn drives the adapter gear to rotate. The adapter gear then drives the clamping component to rotate, so that the driving force is amplified three times and transmitted to the clamping nozzle for output.

[0006] In some embodiments, the inner sidewall of the first housing includes a first mounting groove, a second mounting groove and a third mounting groove stacked together, and the first mounting groove is provided with a first positioning shaft and a second positioning shaft arranged side by side along the length direction of the first housing; The inner sidewall of the second housing is provided with a first positioning hole and a second positioning hole. The two ends of the first positioning shaft and the second positioning shaft are respectively inserted into the first positioning hole and the second positioning hole, so that the first housing and the second housing remain coaxially positioned after assembly.

[0007] In some embodiments, the holding member includes a through first clearance hole and a first slide groove. The first slide groove is an arc-shaped groove and is arranged around the first positioning hole. The first positioning shaft passes through the first positioning hole to rotatably connect the holding member to the first mounting groove. The second positioning shaft passes through the first slide groove so that the holding member can rotate relative to the first positioning shaft with the first positioning shaft as the axis and along the extension direction of the first slide groove.

[0008] In some embodiments, the holding member further includes a connecting post protruding from its surface, the connecting post being disposed on the side of the first groove away from the first positioning hole, for rotatably connecting with the adapter gear.

[0009] In some embodiments, the adapter gear includes a through-hole second clearance hole, and a second groove and a third groove respectively disposed on both sides of the second positioning hole. The third groove is an arc-shaped groove arranged around the second positioning hole. The connecting post is slidably embedded in the second groove. The first positioning shaft passes through the first clearance hole and the third groove in sequence, and the second positioning shaft passes through the first groove and the second clearance hole in sequence, thereby rotatably connecting the adapter gear to the second mounting groove, so that the adapter gear can rotate relative to the second positioning shaft as the axis and along the extension direction of the third groove.

[0010] In some embodiments, the transmission gear is a double gear, including a first gear and a second gear coaxially connected. The first gear is installed in the second mounting slot, and the second gear is installed in the third mounting slot. The tip circle radius of the first gear is smaller than that of the second gear, and the first gear meshes with the adapter gear so that the first gear drives the adapter gear to rotate when it rotates.

[0011] In some embodiments, the drive rack meshes with the second gear so that when the drive rack moves in a straight line, it can drive the second gear to rotate, thereby causing the first gear to rotate synchronously with the second gear.

[0012] In some embodiments, the first housing further includes a fourth mounting groove and a third positioning shaft disposed in the fourth mounting groove. The operating component further includes a latching member disposed below the pull ring. The latching member includes a fixing part, a connecting arm extending along one side of the fixing part, and a claw part formed at the end of the connecting arm. The fixing part includes a through-hole third clearance hole. The third positioning shaft passes through the third clearance hole to rotatably connect the latching member to the fourth mounting groove. The thickness of the connecting arm is less than the width of the fourth mounting groove, so that the latching member can rotate relative to the width direction of the fourth mounting groove with the third positioning shaft as the axis.

[0013] In some embodiments, the claw portion includes a first inclined surface and a second inclined surface stacked together, the second inclined surface protruding above the first inclined surface, and the pull ring having a through hole on the side near the buckle. In the locked state, the second inclined surface passes through the through hole to lock the pull ring in the receiving cavity.

[0014] In some embodiments, the operating component further includes an unlocking button disposed next to the buckle. The unlocking button includes a third inclined surface that matches the first inclined surface. When the unlocking button moves toward the buckle, the first inclined surface and the third inclined surface slide relative to each other, thereby causing the buckle to rotate around the third positioning axis, driving the second inclined surface to disengage from the through hole to release the lock. After the lock is released, the pull ring pops outward from the second opening.

[0015] This invention, through its design of a housing assembly consisting of a first housing and a second housing that interlock to form a receiving cavity, integrates the clamping component, transmission component, and operating component within the receiving cavity. This results in a simple and compact overall structure for the extraction aid. The multi-stage meshing transmission between the drive rack and transmission gear, and the eccentric linkage structure between the adapter gear and the clamping component, achieves smooth and continuous force transmission, significantly improving the structural stability of the extraction aid. The meshing transmission between the drive rack and transmission gear forms a first-stage torque amplification structure, the meshing transmission between the transmission gear and the adapter gear forms a second-stage torque amplification structure, and the eccentric connection between the adapter gear and the clamping component forms a third-stage torque amplification structure. This three-stage amplification of the driving force allows the operator to drive the jaws to push against the retainer with minimal effort, thus enabling smooth insertion or removal of the housing from the frame and significantly reducing the operator's effort. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the three-stage amplification pull-out aid provided in an embodiment of the present invention; Figure 2 This is an exploded view of the three-stage amplification pull-out aid provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first housing provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the clamping component provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the adapter gear provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the fastener provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the unlock button provided in an embodiment of the present invention; Figure 8 This is a partial structural schematic diagram of the three-stage amplification pull-out aid provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the three-stage amplification pull-out aid provided in the embodiment of the present invention in the locked state; Figure 10This is a schematic diagram of the three-stage amplification pull-out aid provided in the embodiment of the present invention under operating conditions; Figure 11 This is a schematic diagram of the assembly of the three-stage amplification amplifier and the chassis provided in the embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described feature, integral, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. Furthermore, the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. The terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships, which may change accordingly when the absolute position of the described object changes.

[0019] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of some known functions and known components are omitted in this specification.

[0020] Please refer to the following: Figures 1 to 2This invention provides a three-stage amplification pull-out aid 1, which assists the chassis 2 in being pushed into a frame (not shown) in the insertion direction or pulled out of the frame in the extraction direction. The three-stage amplification pull-out aid 1 includes a housing assembly 10, a holding member 20, a transmission assembly 30, and an operating assembly 40. The housing assembly 10 includes a first housing 11 and a second housing 12, which are interlocked to form a receiving cavity 13. The receiving cavity 13 has a first opening 131 and a second opening 132 on adjacent sides. The holding member 20, the transmission assembly 30, and the operating assembly 40 are housed within the receiving cavity 13. The holding member 20 is rotatably connected to the first housing 11, and one end of the holding member 20 has a latch 21, which at least partially extends out of the first opening 131 for engaging with the chassis fixed to the frame. The retainer abuts against the body; the transmission assembly 30 is rotatably connected to the first housing 11, including a transition gear 31, a transmission gear 32, and a drive rack 33 that mesh externally in sequence. The transition gear 31 is rotatably connected to the clamping member 20, and the drive rack 33 is fixed above the receiving cavity 13; the operating assembly 40 is located on one side of the transmission assembly 30, including a pull ring 41 fixedly connected to the drive rack 33. When the insertion and extraction operation is performed by the three-stage amplification puller 1, the operator applies a driving force to the pull ring 41 to drive the drive rack 33 to move linearly along its length. The drive rack 33 drives the transmission gear 32 to rotate, which in turn drives the transition gear 31 to rotate, and then the transition gear 31 drives the clamping member 20 to rotate, so that the driving force is amplified three times and then transmitted to the clamping nozzle 21 and output.

[0021] This invention significantly reduces the operating force required for insertion and removal operations by leveraging the synergistic effect of a three-stage torque amplification structure. This allows operators to obtain amplified output thrust at the jaw with only a small driving force, thereby achieving a labor-saving effect of driving the jaw to push against the retainer with less operating force and ensuring that the chassis can be smoothly inserted or removed relative to the frame.

[0022] Please refer to the following: Figure 3In some embodiments, the inner wall of the first housing 11 includes a first mounting groove 111, a second mounting groove 112, and a third mounting groove 113 stacked together. The first mounting groove 111 contains a first positioning shaft 1111 and a second positioning shaft 1112 arranged side by side along the length of the first housing 11. Specifically, the first positioning shaft 1111 and the second positioning shaft 1112 extend protruding from the inner wall of the first housing 11 into the accommodating cavity, and their axial lengths are equal. The contour shape and accommodating size of the first mounting groove 111, the second mounting groove 112, and the third mounting groove 113 are adapted to the contour shape and thickness of the clamping member 20, the adapter gear 31, and the transmission gear 32, respectively. The clamping member 20 is installed in the first mounting groove 111, and the adapter gear 31 is installed in the second mounting groove 112. The sidewalls of each mounting groove radially limit the movement of each component to prevent the components from shifting or moving during operation, thereby ensuring the stability of the gear meshing transmission.

[0023] In some embodiments, the inner sidewall of the second housing 12 is provided with a first positioning hole 121 and a second positioning hole 122. The two ends of the first positioning shaft 121 and the second positioning shaft 122 are respectively inserted into the first positioning hole 121 and the second positioning hole 122, so that the first housing 11 and the second housing 12 remain coaxially positioned after assembly. Specifically, the positions of the first positioning hole 121 and the second positioning hole 122 correspond one-to-one with the positions of the first positioning shaft 1111 and the second positioning shaft 1112. When the first housing 11 and the second housing 12 are fastened together, the end of the first positioning shaft 1111 is inserted into the first positioning hole 121, and the end of the second positioning shaft 1112 is inserted into the second positioning hole 122, so that the first housing 11 and the second housing 12 remain coaxially positioned in the fastened state, preventing relative misalignment between the housings.

[0024] Please refer to the following: Figure 4In some embodiments, the holding member 20 includes a through-hole 22 and a first sliding groove 23. The first sliding groove 23 is an arc-shaped groove arranged around the first positioning hole 121. A first positioning shaft 1112 passes through the first clearance hole 22 to rotatably connect the holding member 20 to the first mounting groove 111. A second positioning shaft 1112 passes through the first sliding groove 23, allowing the holding member 20 to rotate relative to the first positioning shaft 1111 as the axis and along the extension direction of the first sliding groove 23. Specifically, the holding member 20 has a generally fan-shaped plate structure. One end of the holding member 20 extends outward and bends to form a latch 21. The latch 21 is open and is used to extend out of the first opening 131 to abut against the retainer of the frame. The first clearance hole 22 is located on the side of the clamping member 20 away from the latch 21, and the diameter of the first clearance hole 22 is adapted to the diameter of the first positioning shaft 1111 to ensure that the clamping member 20 can rotate around the first positioning shaft 1111. The first slide groove 23 is an arc-shaped through groove, which is opened on the side of the first clearance hole 22. The width of the first slide groove 23 is adapted to the diameter of the second positioning shaft 1112, so that the second positioning shaft 1112 maintains an appropriate fit clearance when sliding in the groove. This ensures that the first slide groove 23 can slide smoothly along the second positioning shaft 1112 when the clamping member 20 rotates, and also prevents the clamping member 20 from shaking in the direction perpendicular to the plane of rotation.

[0025] In some embodiments, the retaining member 20 further includes a connecting post 24 protruding from its surface. The connecting post 24 is disposed on the side of the first groove 23 away from the first positioning hole 121 and is used for rotatable connection with the adapter gear 31. Specifically, the connecting post 24 is integrally formed with the retaining member 20 and protrudes from the surface of the retaining member 20 toward the adapter gear 31. When the retaining member 20 rotates around the first positioning shaft 1111, the connecting post 24 rotates synchronously with the retaining member 20 to engage with the adapter gear 31.

[0026] Please refer to the following: Figure 5In some embodiments, the adapter gear 31 includes a through-hole 311 and a second groove 312 and a third groove 313 respectively disposed on both sides of the second positioning hole 122. The third groove 313 is an arc-shaped groove arranged around the second positioning hole 122. The connecting post 24 is slidably embedded in the second groove 312. The first positioning shaft 1111 passes through the first groove 22 and the third groove 313 in sequence, and the second positioning shaft 1112 passes through the first groove 23 and the second groove 311 in sequence, thereby rotatably connecting the adapter gear 31 to the second mounting groove 112, so that the adapter gear 31 can rotate relative to the second positioning shaft 1112 as the axis and along the extension direction of the third groove 313. Specifically, the second groove 311 is disposed at the center position of the adapter gear 31, and the diameter of the second groove 311 is adapted to the shaft diameter of the second positioning shaft 1112 to ensure that the adapter gear 31 can rotate around the second positioning shaft 1112. The second slide groove 312 is a straight groove. The second slide groove 312 extends outward from one side of the second clearance hole 311 along the radial direction of the adapter gear 31. The groove width of the second slide groove 312 is adapted to the outer diameter of the connecting post 24. The connecting post 24 is slidably embedded in the second slide groove 312 and can slide back and forth along the second slide groove 312, thereby realizing the motion transmission between the clamping member 20 and the adapter gear 31. The third slide groove 313 is an arc-shaped through groove, located on the side of the second clearance hole 311 away from the second slide groove 312. The width of the third slide groove 313 is adapted to the diameter of the first positioning shaft 1111, so that the first positioning shaft 1111 passes through the first clearance hole 22 and the third slide groove 313 in sequence and can slide relative to each other along the third slide groove 313. The arc-shaped trajectory of the third slide groove 313 matches the rotation center of the adapter gear 31. The third slide groove 313 limits the rotation angle of the adapter gear 31 through the cooperation between the groove body and the shaft body, limiting the maximum rotation stroke of the adapter gear 31 and avoiding jamming or tooth dislodging during transmission.

[0027] In some embodiments, the adapter gear 31 further includes an external tooth portion 314 arranged circumferentially along its outer edge. Specifically, the external tooth portion 314 is disposed on the side of the outer periphery of the adapter gear 31 away from the second slide groove 312. The external tooth portion 314 is composed of a plurality of teeth and is used for external meshing with the transmission gear 32, thereby realizing the motion transmission between the adapter gear 31 and the transmission gear 32. The arrangement range of the external tooth portion 314 corresponds to the preset rotation angle range of the adapter gear 31 to ensure that the external tooth portion 314 always maintains effective meshing with the first gear 321 of the transmission gear 32 throughout the entire rotation stroke of the adapter gear 31. Preferably, the tooth portion 314 can be a partial tooth segment or a set of teeth arranged around the entire periphery of the adapter gear 31.

[0028] In some embodiments, the transmission gear 32 is a double gear, including a first gear 321 and a second gear 322 coaxially connected. The first gear 321 is installed in a second mounting groove 312, and the second gear 322 is installed in a third mounting groove 313. The tip circle radius of the first gear 321 is smaller than that of the second gear 322, and the first gear 321 meshes with the adapter gear 31 so that the first gear 321 drives the adapter gear 31 to rotate when it rotates. The outline shape and accommodating size of the second mounting groove 112 are adapted to the overall layout of the first gear 321 and the adapter gear 31. The first gear 321 and the adapter gear 31 are jointly housed in the second mounting groove 112, so that the meshing teeth of the first gear 321 and the adapter gear 31 are in the same meshing plane, thereby ensuring the coaxiality and transmission smoothness of the external meshing transmission and avoiding tooth surface wear or transmission jamming caused by axial misalignment. The first gear 321 meshes externally with the adapter gear 31, further transmitting the power from the second gear 322 and the first gear 321 to the adapter gear 31. The second gear 322 is installed in the third mounting groove 113, which is stacked and interconnected with the second mounting groove 112. The first gear 321 and the second gear 322 are stacked along the axial direction of the transmission gear 32, sharing the same rotation center, thus achieving synchronous rotation. Furthermore, the tip circle radius of the second gear 322 is larger than that of the first gear 321. The difference in tip circle radii between the first gear 321 and the second gear 322 creates a torque transformation, further amplifying the torque before outputting it outward.

[0029] In some embodiments, the drive rack 33 meshes with the second gear 322 so that when the drive rack 33 moves linearly, it can drive the second gear 322 to rotate, thereby causing the first gear 321 to rotate synchronously with the second gear 322. Specifically, the drive rack 33 is fixedly installed above the accommodating cavity 13 along the length direction of the first housing 11, that is, the drive rack 33 is arranged in the accommodating cavity 13 near the top along the length direction of the first housing 11, and is located above the transmission gear 32 and the adapter gear 31. The transmission components do not interfere with each other, which greatly reduces the lateral size occupied by the entire puller.

[0030] In some embodiments, the drive rack 33 includes an integrally formed meshing tooth portion 331 and an assembly connection portion 332. The meshing tooth portion 331 is disposed on the side of the drive rack 33 facing the second gear 322 and is used for external meshing transmission with the second gear 322 to convert the linear driving force of the drive rack 33 into the rotational torque of the transmission gear 32. The meshing tooth portion 331 is composed of a plurality of teeth arranged sequentially along the length direction of the drive rack 33. The length of the meshing tooth portion 331 is greater than the tooth tip circumference of the second gear 322 to ensure that the meshing tooth portion 331 always maintains effective meshing with the second gear 322 without disengaging throughout the entire stroke of the drive rack 33.

[0031] In some embodiments, the assembly connection portion 332 is disposed on the side of the meshing tooth portion 331 and accommodated in the sixth mounting groove 116. The assembly connection portion 332 includes a fixing groove 3321 and a fixing hole 3322. The fixing groove 3321 is recessed inward from the inner surface of the assembly connection portion 332 into one end of the drive rack 33 for fixed connection with the pull ring 41. The fixing hole 3322 is opened through the groove wall of the fixing groove 3321 along the thickness direction of the assembly connection portion 332 for fasteners to be inserted to fix the pull ring 41 in the mounting groove 3321, so that the linear movement of the pull ring 41 can be accurately transmitted to the drive rack 33 and prevent relative displacement or disengagement between the two during transmission.

[0032] Please refer to the following: Figure 6 In some embodiments, the first housing 11 further includes a fourth mounting groove 114 and a third positioning shaft 1141 disposed in the fourth mounting groove 114. The operating component 40 further includes a buckle 42 disposed below the pull ring 41. The buckle 42 includes a fixing part 421, a connecting arm 422 extending along one side of the fixing part 421, and a claw part 423 formed at the end of the connecting arm 422. The fixing part 421 includes a through-hole third clearance hole 4211. The third positioning shaft 1141 passes through the third clearance hole 4211 to rotatably connect the buckle 42 to the fourth mounting groove 114. The thickness of the connecting arm 422 is less than the width of the fourth mounting groove 114, so that the buckle 42 can rotate relative to the width direction of the fourth mounting groove 114 with the third positioning shaft 1141 as the axis. Specifically, the outline shape and accommodating size of the fourth mounting groove 114 are adapted to the outline shape and thickness of the fastener 42, effectively limiting the two sides of the fastener 42 and preventing axial displacement during rotation. The third clearance hole 4211 is located at the center of the fixing part 421, and the third positioning shaft 1141 passes through the third clearance hole 4211 to rotatably connect the fastener 42 to the fourth mounting groove 114. The diameter of the third clearance hole 4211 is adapted to the shaft diameter of the third positioning shaft 1141, and the thickness of the connecting arm 422 is less than the width of the fourth mounting groove 114, so as to ensure that the fastener 42 can reciprocate around the third positioning shaft 1141 as the axis along the groove width direction of the fourth mounting groove 114, avoiding interference with the side wall of the fourth mounting groove 114.

[0033] In some embodiments, the claw portion 423 includes a first inclined surface 4231 and a second inclined surface 4232 stacked together. The second inclined surface 4232 protrudes above the first inclined surface 4231. The pull ring 41 has a through hole 411 on the side near the buckle 42. In the locked state, the second inclined surface 4232 passes through the through hole 411 to lock the pull ring 41 in the receiving cavity 13. Specifically, the first inclined surface 4231 and the second inclined surface 4232 form a stepped wedge structure on the claw portion 423. The second inclined surface 4232 is located above the first inclined surface 4231 and protrudes towards the pull ring 41 to form a hook-shaped locking end. The cross-sectional dimensions of the second inclined surface 4232 match the through hole 411 of the pull ring. In the locked state, the second inclined surface 4232 of the claw portion 423 passes through the through hole 411 on the pull ring 41, and the end of the second inclined surface 4232 hooks onto the edge of the through hole 411, locking the pull ring 41 in the sixth mounting groove 116 to prevent the pull ring 41 from automatically opening due to vibration or gravity when not in use.

[0034] Please refer to the following: Figures 7 to 8 In some embodiments, the operating component 40 further includes an unlocking button 43 disposed next to the buckle 42. The unlocking button 43 includes a third inclined surface 431 that matches the first inclined surface 4231. When the unlocking button 43 moves toward the buckle 42, the first inclined surface 4231 and the third inclined surface 431 slide relative to each other, thereby causing the buckle 42 to rotate around the third positioning shaft 1141 as the axis, driving the second inclined surface 4232 to disengage from the through hole 411 to release the lock. After the lock is released, the pull ring 41 pops out from the second opening 132. Specifically, the unlock button 43 is a block-shaped component. It is slidably disposed beside the fourth mounting groove 114 along the length of the housing assembly 10. A third inclined surface 431 is located on the end face of the unlock button 43 facing the latching member 42. The inclination angle of the third inclined surface 431 matches the inclination angle of the first inclined surface 4231, allowing them to form a surface contact sliding fit upon contact. This converts the linear motion of the unlock button 43 along its length into the rotational motion of the latching member 42 around the third positioning axis 1141. The end of the unlock button 43 away from the third inclined surface 431 forms a pressing end, which protrudes from the second opening 132 onto the outside of the housing assembly for the operator to press.

[0035] In some embodiments, after the pressure on the unlock button 43 is released, the unlock button 43 can automatically reset. The unlock button 43 slides away from the latching member 42, causing the third inclined surface 431 to disengage from the first inclined surface 4231 of the latching member 42, thus releasing the lateral pushing constraint on the latching member 42. Under the elastic restoring torque of its own reset torsion spring, the latching member 42 rotates back around the third positioning axis 1141 to return to the initial locking position, so that the claw portion 423 is ready to engage the pull ring 41 for the next locking.

[0036] In some embodiments, a torsion spring is further provided between the pull ring 41 and the housing assembly 10. One end of the torsion spring 44 abuts against or is fixedly connected to the inner sidewall of the first housing 11, and the other end of the torsion spring 44 abuts against or is fixedly connected to the pull ring 41. In the locked state, the pull ring 41 is retracted and fixed in the sixth mounting groove 116 against the elastic force of the torsion spring 44, and the torsion spring 44 is in a torsional compressed energy storage state. When the unlock button 43 is pressed to release the latch 42 from locking the pull ring 41, the pull ring 41 rotates outward under the elastic restoring force of the torsion spring 44, and springs outward from the second opening 132 to the unfolded position, so that the operator can hold and pull it. After the operator completes the pull or push operation and releases the pull ring 41, the pull ring 41 can be manually pushed back into the closed position, so that the claw part 423 of the buckle 42 passes through the through hole 411 again and locks the pull ring 41 in the receiving cavity 13. At this time, the torsion spring 44 is twisted and compressed again until the next unlocking operation.

[0037] This invention, through its design of a housing assembly consisting of a first housing and a second housing that interlock to form a receiving cavity, integrates the clamping component, transmission component, and operating component within the receiving cavity. This results in a simple and compact overall structure for the extraction aid. The multi-stage meshing transmission between the drive rack and transmission gear, and the eccentric linkage structure between the adapter gear and the clamping component, achieves smooth and continuous force transmission, significantly improving the structural stability of the extraction aid. The meshing transmission between the drive rack and transmission gear forms a first-stage torque amplification structure, the meshing transmission between the transmission gear and the adapter gear forms a second-stage torque amplification structure, and the eccentric connection between the adapter gear and the clamping component forms a third-stage torque amplification structure. This three-stage amplification of the driving force allows the operator to drive the jaws to push against the retainer with minimal effort, thus enabling smooth insertion or removal of the housing from the frame and significantly reducing the operator's effort.

[0038] Please refer to the following: Figures 9 to 11 This invention also provides a method for inserting or removing the chassis based on the aforementioned three-stage amplification auxiliary device. This method utilizes gear meshing and lever principles to amplify the driving force in three stages, thereby assisting the chassis in smoothly inserting or removing itself relative to the frame. The method includes the following steps: Unlock the pull ring and apply driving force to drive the drive rack in a linear motion. Specifically, the three-stage extraction aid 1 is installed on the side of the housing 2 using fasteners. After assembly, the extraction aid's locking nozzle is aligned and engaged with the retainer on the frame. The operator presses the unlock button 43, and the third inclined surface 431 of the unlock button 43 pushes against the first inclined surface 4231 of the latching member 42. The inclined surfaces slide against each other, driving the latching member 42 to rotate around the third positioning axis 1141. The second inclined surface 4232 of the latching member 42 disengages from the through hole 411 of the pull ring 41, releasing the lock on the pull ring 41. Under the return force of the torsion spring, the pull ring 41 pops out from the second opening 132. The operator holds the popped-out pull ring 41 and applies driving force in the insertion or extraction direction. The pull ring 41 drives the drive rack 33 to move linearly in the insertion direction.

[0039] The drive rack drives the transmission gear to rotate, achieving the first stage of torque amplification. Specifically, the meshing teeth 331 of the drive rack 33 mesh externally with the second gear 322 of the transmission gear 32. Through the meshing transmission between the teeth 331 and the second gear 322, the linear driving force of the drive rack 33 is converted into a rotational torque that drives the second gear 322 to rotate around its central axis, thus driving the second gear 322 to rotate around its central axis. Furthermore, the second gear 322 drives the first gear 321, which is coaxially fixedly connected to it, to rotate synchronously. Based on the lever principle of gear transmission, during torque transmission, the tip circle radius of the second gear 322 is the first-stage input force arm, and the tip circle radius of the first gear 321 is the first-stage output force arm. Since the tip circle radius of the second gear 322 is larger than that of the coaxially fixed first gear 321, when the driving force applied to the second gear 322 is transmitted to the first gear 321, the torque is amplified for the first time. The torque amplified by the first stage is output outward through the first gear 321 and transmitted to the adapter gear 31.

[0040] The transmission gear drives the adapter gear to rotate, achieving a second-stage torque amplification. Specifically, the first gear 321 meshes with the external teeth 314 of the adapter gear 31. During the rotation of the first gear 321, its teeth push against the external teeth 314 of the adapter gear 31, thereby driving the adapter gear 31 to perform a fixed-axis rotational motion around the second positioning shaft 1112 as the axis and along the defined trajectory of the third slide groove 313. While the adapter gear 31 rotates around the second positioning shaft 1112, the second slide groove 312 opened on it swings synchronously with the adapter gear 31. Since the connecting post 24 of the clamping member 20 is slidably embedded in the second slide groove 312, and the axis of the connecting post 24 is offset from the rotation center of the clamping member 20, an eccentric transmission structure is formed. When the adapter gear 31 rotates, the sidewall of the second slide groove 312 pushes against the connecting post 24, causing the connecting post 24 to slide adaptively along the inside of the second slide groove 312. Simultaneously, this drives the clamping member 20 to rotate around the first positioning shaft 1111 at a limited angle. The addendum circle radius of the adapter gear 31 is the secondary input force arm, and the straight-line distance from the center of the second positioning shaft 1112 to the center of the connecting post 24 is the secondary output force arm. Furthermore, the addendum circle radius of the adapter gear 31 is greater than the center distance between the second positioning shaft 1112 and the connecting post 24. According to the lever torque balance principle, during this stage of power transmission, the input torque of the adapter gear 31 is transmitted to the clamping member 20 via the slide groove connecting rod structure, resulting in a second torque amplification. The amplified torque is then output through the connecting post 24 and transmitted to the clamping member 20.

[0041] The clamping component drives the chassis to move relative to the frame, achieving a third-stage torque amplification. Specifically, the rotational motion of the adapter gear 31 is converted into the swinging motion of the clamping component 20 around the first positioning shaft 1111 via the connecting column 24. During this process, the connecting column 24 adaptively slides within the second slide groove 312, driving the clamping component 20 to swing along the first slide groove 23 with the first positioning shaft 1111 as the axis, and the clamping nozzle 21 of the clamping component 20 maintains abutment with the retainer of the frame. With the first positioning axis 1111 as the common rotation center, the distance from the center of the first positioning axis 1111 to the center of the connecting column 24 is the third-level input force arm, and the distance from the center of the first positioning axis 1111 to the contact point between the latch 21 and the retainer is the third-level output force arm. Furthermore, the distance from the center of the first positioning axis 1111 to the center of the connecting column 24 is greater than the distance from the center of the first positioning axis 1111 to the contact point between the latch 21 and the retainer. According to the lever torque amplification principle, the driving torque input by the connecting column 24 is further amplified by the lever structure of the clamping member 20. The gain is increased to achieve a third-stage torque amplification. The amplified torque is then transmitted to the latch 21. When the latch 21 rotates around the first positioning axis 1111 with the holding member 20, the contact surface at the end of the latch 21 contacts and pushes against the retainer on the frame. Since the retainer is fixed to the frame, it generates a reaction force on the latch 21. This reaction force is transmitted to the chassis through the housing assembly, thereby driving the chassis to be pushed in the insertion direction or pulled out in the extraction direction relative to the frame, thus realizing the insertion and removal operation of the functional module. By rationally designing the ratio of the tooth tip circle radius of each gear and the ratio of the lever arm length, the small driving force applied by the operator to the pull ring can be amplified by the three-stage lever composite to obtain several times or even tens of times the output thrust at the latch, thereby significantly reducing the force required by the operator and realizing lightweight, low-resistance, and labor-saving insertion and removal of the chassis module.

[0042] The pull ring 41 is reset and locked within the receiving cavity 13. Specifically, after completing the pull-out or push-out operation, the operator releases the pull ring 41, manually rotates it from the unfolded position to the retracted position, and pushes it back into the receiving cavity 13. When the pull ring 41 is fully received within the receiving cavity 13 and reaches the retracted position, the second inclined surface 4232 of the claw portion 423 passes through the through hole 411 on the pull ring 41, and the end of the second inclined surface 4232 hooks onto the edge of the through hole 411, locking the pull ring 41 within the sixth mounting slot 116. When the next insertion / removal operation is required, the unlock button 43 is pressed again, and the above steps are repeated to complete the unlocking, force application, three-stage amplification, and insertion / removal operations again.

[0043] The above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the scope of disclosure involved in the above embodiments is not limited to technical solutions formed by specific combinations of the above technical features, but should also cover other technical solutions formed by arbitrary combinations of the above technical features or their equivalent features without departing from the above-disclosed concept. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0044] Furthermore, while the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in sequential order. In certain circumstances, multitasking and parallel processing may be advantageous. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the invention. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

Claims

1. A three-stage amplification pull-out aid, used to assist the chassis in being pushed into the frame in the insertion direction or pulled out of the frame in the pull-out direction, characterized in that, The three-stage amplification pull-out aid includes a housing assembly, a clamping component, a transmission assembly, and an operating assembly; The housing assembly includes a first housing and a second housing, which are fastened together to form a receiving cavity. The receiving cavity has a first opening and a second opening on adjacent sides. The holding member, the transmission assembly, and the operating assembly are housed within the receiving cavity. The clamping member is rotatably connected to the first housing. One end of the clamping member is provided with a latch, which at least partially extends out of the first opening for engaging with a retainer fixed on the frame. The transmission assembly is rotatably connected to the first housing and includes a transition gear, a transmission gear, and a drive rack that mesh externally in sequence. The transition gear is rotatably connected to the holding member, and the drive rack is fixed above the accommodating cavity. The operating component is disposed on one side of the transmission component and includes a pull ring fixedly connected to the drive rack; When performing insertion and extraction operations using the three-stage amplification and extraction aid, the operator applies a driving force to the pull ring, causing the drive rack to move linearly along its length. The drive rack drives the transmission gear to rotate, which in turn drives the adapter gear to rotate. The adapter gear then drives the clamping component to rotate, so that the driving force is amplified three times and transmitted to the clamping nozzle for output.

2. The three-stage amplification pull-out aid as described in claim 1, characterized in that, The inner wall of the first housing includes a first mounting groove, a second mounting groove and a third mounting groove stacked together. The first mounting groove is provided with a first positioning shaft and a second positioning shaft arranged side by side along the length direction of the first housing. The inner sidewall of the second housing is provided with a first positioning hole and a second positioning hole. The two ends of the first positioning shaft and the second positioning shaft are respectively inserted into the first positioning hole and the second positioning hole, so that the first housing and the second housing remain coaxially positioned after assembly.

3. The three-stage amplification pull-out aid as described in claim 2, characterized in that, The holding member includes a through first clearance hole and a first sliding groove. The first sliding groove is an arc-shaped groove and is arranged around the first positioning hole. The first positioning shaft passes through the first positioning hole to rotatably connect the holding member to the first mounting groove. The second positioning shaft passes through the first sliding groove so that the holding member can rotate relative to the first positioning shaft with the first positioning shaft as the axis and along the extension direction of the first sliding groove.

4. The three-stage amplification pull-out aid as described in claim 3, characterized in that, The holding member further includes a connecting post protruding from its surface. The connecting post is located on the side of the first groove away from the first positioning hole and is used to rotatably connect with the adapter gear.

5. The three-stage amplification pull-out aid as described in claim 4, characterized in that, The adapter gear includes a through-hole and a second sliding groove and a third sliding groove respectively disposed on both sides of the second positioning hole. The third sliding groove is an arc-shaped groove arranged around the second positioning hole. The connecting post is slidably embedded in the second sliding groove. The first positioning shaft passes through the first sliding hole and the third sliding groove in sequence, and the second positioning shaft passes through the first sliding groove and the second sliding hole in sequence, so that the adapter gear is rotatably connected to the second mounting groove, so that the adapter gear can rotate relative to the second positioning shaft as the axis and along the extension direction of the third sliding groove.

6. The three-stage amplification pull-out aid as described in claim 5, characterized in that, The transmission gear is a double gear, including a first gear and a second gear connected coaxially. The first gear is installed in the second mounting slot, and the second gear is installed in the third mounting slot. The tip circle radius of the first gear is smaller than that of the second gear, and the first gear meshes with the adapter gear so that the first gear drives the adapter gear to rotate when it rotates.

7. The three-stage amplification pull-out aid as described in claim 6, characterized in that, The drive rack meshes with the second gear so that when the drive rack moves in a straight line, it can drive the second gear to rotate, thereby causing the first gear to rotate synchronously with the second gear.

8. The three-stage amplification pull-out aid as described in claim 1, characterized in that, The first housing further includes a fourth mounting groove and a third positioning shaft disposed in the fourth mounting groove. The operating component further includes a buckle disposed below the pull ring. The buckle includes a fixing part, a connecting arm extending along one side of the fixing part, and a claw part formed at the end of the connecting arm. The fixing part includes a through-hole third clearance hole. The third positioning shaft passes through the third clearance hole to rotatably connect the buckle to the fourth mounting groove. The thickness of the connecting arm is less than the width of the fourth mounting groove so that the buckle can rotate relative to the width direction of the fourth mounting groove with the third positioning shaft as the axis.

9. The three-stage amplification pull-out aid as described in claim 8, characterized in that, The claw portion includes a first inclined surface and a second inclined surface stacked together. The second inclined surface protrudes above the first inclined surface. The pull ring has a through hole on the side near the buckle. In the locked state, the second inclined surface passes through the through hole to lock the pull ring in the receiving cavity.

10. The three-stage amplification pull-out aid as described in claim 8, characterized in that, The operating component also includes an unlocking button located next to the buckle. The unlocking button includes a third inclined surface that matches the first inclined surface. When the unlocking button moves toward the buckle, the first inclined surface and the third inclined surface slide relative to each other, thereby causing the buckle to rotate around the third positioning axis, driving the second inclined surface to disengage from the through hole to release the lock. After the lock is released, the pull ring pops out from the second opening.

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