Trip increasing extractor

Abstract

The utility model relates to a kind of increasing stroke's puller, it is to solve the technical problems of the poor design of the rotating piece structure of existing similar products, lack of planetary structure to reduce torque output, lack of synchronous for increasing stroke's design of the structure of the pull piece.The rotating piece side of the puller is equipped with opposite sharp clamping head and square clamping head, wrench, planetary gear, rotating piece are sequentially connected as the center shaft of one body and are fixed in the side opening of fixed box by rivet hinged connection;Its gist is that the inner tooth ring of the planetary gear is equipped with star wheel that is equidistantly arranged and is engaged with each other, four square column at the sun gear center of star wheel is connected with one side four square hole at wrench;Wrench other side is equipped with integrally formed and protruding gear column, gear column is engaged with the linkage gear in the outside end corner opening of fixed box on one side, the other side of linkage gear is engaged with the gear one end gear part of gear pull piece in the outside end corner opening of fixed box below the sharp clamping head of rotating piece, the pull piece part of gear pull piece other end is located below the sharp clamping head of rotating piece synchronous rotation.

Description

Technical Field

[0001] This utility model relates to a server wrench tool used in industries such as communications, and is a pull-out aid that increases the stroke. Background Technology

[0002] A puller is a tool specifically designed for removing electronic components or assisting in the plugging and unplugging of connectors. Some pullers are modular components used for quickly installing and removing server motherboards and chassis from server racks. These pullers typically consist of a handle, a locking plate, and a base. The base is mounted to the board, the locking plate secures the base to the server motherboard and chassis, and the handle acts as a wrench for rotating and using the locking plate. For example, a server / device rail puller is used to remove heavy servers, switches, disk arrays, and other devices from a rack. It is usually a metal rod with a hook or slot at one end. Inserting it into a special hole or latch on the front of the device and pulling it backward unlocks the internal security mechanism and provides a lever to help slide the device out. For example, Chinese patent application number 201720229011.6, authorized on June 5, 2018, entitled "Exhaust latch assembly and system for fixing a plate in a frame"; another example is Chinese patent application number 202421047670.4, authorized on March 18, 2025, entitled "Exhaust aid"; however, the structural design of the hook or slot end of the above products and similar products is not good, which makes it inconvenient to insert and remove the fixed rotation. At the same time, the wrench lacks a combination structure design, making it difficult to assemble a suitable length according to actual needs, and lacks a planetary structure to improve torque transmission and reduce torque output. In particular, it lacks a paddle structure design to increase the stroke at the same time. Summary of the Invention

[0003] To overcome the aforementioned shortcomings, the purpose of this utility model is to provide a stroke-increasing puller that addresses the inconveniences of existing similar products, including poor structural design at the hook or slot end, which hinders insertion and removal of the lever for fixed rotation; the lack of a modular design, making it difficult to assemble to the appropriate length according to actual needs; the absence of a planetary structure to improve torque transmission and reduce torque output; and, most importantly, the lack of a paddle mechanism to increase stroke. This objective is achieved through the following technical solution.

[0004] An auxiliary puller for increasing stroke is provided. The auxiliary puller is symmetrically fixed at two corners on the outside of a functional module. The wrench of the auxiliary puller is folded outward and inward parallel to the plane of the functional module when it is placed in the cabinet. Fixing plates are equidistantly arranged on the inner side of the door frame on both sides of the cabinet. One end of the wrench is connected to the rotating plate by a planetary gear and is stacked in a circular shape. It is inserted into the opening on one side of the outer corner of the fixing box. The central shaft, which is connected in sequence with the wrench, planetary gear, and rotating plate, is fixed to the opening on one side of the fixing box by a rivet. One side of the rotating plate is provided with two pointed and square locking heads that are grooved and protruding. The key structural design features are as follows: the lugs on at least two sides of the internal gear ring of the planetary gear are fixed to the inner wall of one side of the outer corner opening of the fixed box by screws; a stepped side opening is provided on the side of the rotating part of the rotating plate within the outer corner opening of the fixed box to accommodate and communicate with the rotation of the rotating part; four or three equidistant and meshing star wheels are provided inside the internal gear ring of the planetary gear; the central shafts of the star wheels are respectively inserted into and fixed to the disk surface of the rotating plate; a sun gear with an outer diameter meshing with the star wheels is provided in the middle between the star wheels; the square column at the center of the sun gear is connected to a square hole on one side of the wrench; the sun gear is the central gear, and the rotating plate is the planet carrier; an integrally formed and protruding gear post is provided on the other side of the wrench, and the gear post meshes with the linkage gear on one side of the outer corner opening of the fixed box. The other side of the linkage gear meshes with the gear part of one end of the gear lever inside the outer corner opening of the fixed box below the pointed head of the rotating plate. The pointed head of the rotating plate is bent downward and stamped into a triangle. The lever part at the other end of the gear lever rotates synchronously below the pointed head of the rotating plate. When the gear lever is driven by the wrench and the linkage gear to extend out of the fixed box along with the pointed head of the rotating plate, the lever part of the gear lever is located behind the pointed head of the rotating plate inside the outer corner opening of the fixed box. The end of the lever part of the gear lever is slightly higher than the end of the pointed head of the lower rotating plate until the end of the lever part of the gear lever engages with the locking hole of the fixed plate. Then, the end of the pointed head of the lower rotating plate engages with the locking hole of the fixed plate, and the lever part of the gear lever rotates and retracts into the other side of the fixed box. Thus, the pull-out aid increases the travel by first inserting the end of the follow-up gear paddle, which protrudes above the pointed end of the rotating plate, into the mounting plate's locking hole. Then, the pointed end of the rotating plate replaces the original end of the gear paddle inserted into the mounting plate's locking hole, allowing the mounting box and functional modules to be pushed into the cabinet. Conversely, when the functional modules are pulled out of the cabinet using a wrench, the pointed end of the rotating plate first disengages from the mounting plate's locking hole, and then the end of the follow-up gear paddle disengages from the mounting plate's locking hole. The synchronous insertion and disengagement of the gear paddle and rotating plate into the mounting plate's locking hole are achieved through the gear ratio between the corresponding gears.

[0005] The central shafts of the linkage gears within the fixed box, including the sun gear of the planetary gear and the gear portion of the gear lever, are arranged in a triangular configuration. The central shafts of the gear portion of the gear lever and the sun gear of the planetary gear are located on one side of the fixed plate, with the central shaft of the gear portion of the gear lever slightly higher and closer to the fixed plate. This is an embodiment of the specific distribution of the central shafts of the three main gears that enable the functional module to be pushed into or pulled out of the cabinet by a handle. These specific positions can be adjusted according to the diameter of the corresponding gears and the distance of increased travel.

[0006] The center of the angle between the pointed and square clamps of the rotating plate is 60 degrees. The angle between the inner sharp corner of the pointed clamp and the center of the square clamp is 45 degrees, and it tilts slightly inward by less than 5 degrees. The outer corner corresponding to the inner sharp corner of the pointed clamp is raised at a 15-degree angle to the cut edge. The pointed clamp of the rotating plate is slightly higher than the square clamp. The above is a specific structural embodiment of the rotating plate, which satisfies the linkage between the rotating plate and the gear lever in a specific position, and prevents interference between them.

[0007] The pointed and square clamps of the rotating plate are punched and bent higher towards the planetary gear side plane. The square clamp is level with the height of the planetary gear, and the pointed clamp is level with the height of the rotating plate side of the wrench and extends out in an L-shape to form a triangular end. Thus, the puller inserts into the locking hole of the fixing plate through the triangular end of the pointed clamp of the rotating plate, realizing the pushing of the fixing box and functional module into the cabinet.

[0008] The paddle portion of the linkage gear is limited to rotating within a limiting groove on the inner wall of the other side of the fixed box.

[0009] One end of the wrench is integrated with the planetary gear and rotating plate via an end cap. A T-shaped wedge at one end of the wrench is inserted into and wedged into a square groove on one side of the end cap and connected by screws. The other end of the wrench has a waist-shaped gripping hole. The plane between the wrench's wedge end and the gripping hole end is aligned parallel to the plane of the functional module placed in the cabinet, forming a plate shape. The wrench body is a die-cast plate. This structure allows the wrench's length to be adjusted according to actual needs, while the end cap, which fulfills the main functions and technical objectives, does not require structural design adjustments and can be used as a general-purpose component.

[0010] The wrench has a hook and a positioning element at one end of its grip hole. The positioning element protrudes from the inner corner of the wrench on the outer side of the functional module. The hook is located in the hook hole at the end of the wrench and is fixed in place by a central pin and a retaining spring. One end of the hook on the outer side of the functional module extends beyond the notch in the hook hole at the outer corner of the wrench, while the other end extends from the side edge and hook hole of the wrench. When the wrench is locked against the outer edge of the functional module, it hooks into the hook groove of the functional module. The positioning element is inserted into the positioning hole on the outer edge of the functional module. A spring is provided in the hook hole inside the pressing part of the hook, or a torsion spring is provided at the pin of the hook. This structural design facilitates the positioning and locking of the wrench after it is pushed into the functional module.

[0011] The wrench has a beveled edge on one side of the grip hole and at the tail end where the hook and positioning element are located, protruding outwards and extending above the edge of that side. Correspondingly, the inner side of the wrench has a symmetrical beveled low-groove edge that is longer than the outward protrusion and the hook and positioning element at the tail end. This structural design facilitates wrench gripping and does not affect the heat dissipation holes of the functional modules.

[0012] The inner ring of the planetary gear is clamped to the circular disk of the two ends and the rotating plate, respectively. The outer plane of the rotating plate is lower than the plane of the end. When the end, the planetary gear and the rotating plate are connected as a whole and inserted into the opening on the outer corner of the fixed box, the inner arc edge of the end that is higher than the plane of the rotating plate is in contact with the outer arc edge of the fixed box and rotates.

[0013] The fixing box is L-shaped. On the outer corner of the L-shaped fixing box, the side with the wrench opening has an outwardly protruding semi-circular edge. Inside the fixing box, at the outer diameter of the opening slot, on one side of the inner corner, are three connected edges and mounting portions that are raised and smaller than the end face, forming square slots. Two fixing boxes are fixed to the two outer corners of the functional module via mounting portions distributed at right angles on both sides. The wrenches on both sides are simultaneously folded towards the middle of the functional module on that side. The above is a specific structural embodiment of the fixing box, which facilitates rotation with one end fitting against the semi-circular edge of the fixing box.

[0014] The fixing box has a slanted reinforcing edge between the two mounting portions on the inner corner. The mounting portion at one outer end of the fixing box has a larger cross-section than the mounting portion at the other end. The mounting portion at one outer end has four symmetrical mounting holes on each side. The mounting portion at the other end is T-shaped and has one large mounting hole on one side and two small mounting holes on the connected side. The slanted edge of the large cross-section mounting portion of the reinforcing edge has an extension edge. The above is a specific structural embodiment of the fixing box.

[0015] The fixing plate has three rectangular locking holes spaced equidistantly at both ends. Each square hole has an outwardly protruding guide block and a reinforcing block on either side of its outer diameter. The inner corner of the guide block has a chamfered edge, and the height of the guide block is greater than the height of the reinforcing block. The pointed locking head of the rotating plate and the lever part of the gear lever rotate into or out through the corresponding hole on one side of the guide block of the fixing plate. When the wrench is rotated until the pointed locking head of the rotating plate is completely disengaged from the locking hole on the fixing plate, the square locking head of the rotating plate abuts against the outer edge of the locking hole on one side of the fixing plate. The above is a specific structural embodiment of the fixing plate.

[0016] This utility model has a reasonable structural design, is easy to assemble and use, has low production cost, is labor-saving to operate, and has a wide range of applications; it is suitable for use as an auxiliary puller with increased stroke function on the cabinet, and is a structural improvement of similar products. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the exploded structure of this utility model. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model. Figure 2 .

[0019] Figure 3 yes Figure 1 Schematic diagram of the assembled three-dimensional structure Figure 1 The part outlined in the diagram represents the internal structure of the fixed box.

[0020] Figure 4 yes Figure 3 The diagram shows a cross-sectional view of the fixed box, with the dashed lines representing the cross-sectional structure inside.

[0021] Figure 5 yes Figure 1 Schematic diagram of the assembled three-dimensional structure Figure 2 The structure of the planetary gear inside the fixed box is shown in the figure, as indicated by the dotted line.

[0022] Figure 6 yes Figure 5 The diagram shows the structure on the other side. The fixing plate is omitted in the diagram. The dotted line represents the internal structure on the other side of the fixing box, and the framed part represents the internal structure at the end of the fixing box.

[0023] Figure 7 This is a schematic diagram of the state structure of the functional modules of this utility model when they are installed in the cabinet.

[0024] Figure 8 yes Figure 7 A schematic diagram of the state of the wrench during rotation.

[0025] Figure 9 yes Figure 8The diagram shows the structure of state two as the wrench continues to rotate.

[0026] Figure 10 yes Figure 9 The diagram shows the state structure of the functional modules after they are installed in the rack. The dotted lines in the diagram represent the rack with the mounting plate installed and the functional modules pushed into the rack, respectively.

[0027] Figure 11 yes Figure 10 The diagram shows the structure of the function module that is pushed out after the wrench is opened. The arrows in the diagram represent the opening direction of the wrench and the pulling direction of the puller.

[0028] Figure 12 This is a schematic diagram of the main view structure of the rotating plate of this utility model.

[0029] Attached Figures and Their Names: 1. Fixing Plate, 101. Guide Block, 102. Reinforcing Block, 2. Wrench, 201. Wedge, 202. Grip Hole, 3. End, 301. Gear Column, 4. Planetary Gear, 401. Internal Gear Ring, 402. Star Wheel, 403. Sun Gear, 4031. Square Column, 5. Rotating Plate, 501. Pointed Clamp, 502. Square Clamp, 6. Linkage Gear, 7. Gear Dial, 8. Fixing Box, 801. Mounting Part, 802. Reinforcing Edge, 803. Limiting Groove, 9. Hook, 10. Positioning Part, 11. Functional Module, 12. Cabinet. Implementation

[0030] The structure and use of this utility model will now be further described with reference to the accompanying drawings. Figures 1-12As shown, the pull-out aid is symmetrically fixed at the two end corners of the outer side of the functional module 11. The wrench 2 of the pull-out aid is folded outward and inward parallel to the plane of the functional module placed in the cabinet 12. The fixing plates 1 are equidistantly arranged on the inner side of the door frame on both sides of the cabinet. One end of the wrench is connected to the rotating plate 5 by the planetary gear 4 and is stacked in a circle. At the same time, it is inserted into the opening on one side of the outer end corner of the fixing box 8. The central shaft, which is connected to the wrench, planetary gear and rotating plate in sequence, is fixed to the opening on one side of the fixing box by rivets. The rotating plate has two pointed heads 501 and square heads 502 with grooves and protrusions between them. The internal gear ring 401 of the planetary gear has lugs on at least two sides that are fixed to the inner wall of one side of the outer corner opening of the fixed box by screws. The outer corner opening of the fixed box has a stepped side opening on one side of the rotating position of the pointed chuck 501 of the rotating plate, which accommodates and communicates with the rotation of the pointed chuck. The internal gear ring of the planetary gear has four equidistant and meshing star wheels 402. The central shafts of the star wheels are respectively inserted into and fixed to the disk surface of the rotating plate. A sun gear 403 with an outer diameter that meshes with the star wheels is located between the star wheels. The center of the sun gear... The square post 4031 is connected to the square hole on one side of the wrench. The sun gear is the central gear and the rotating plate is the planetary carrier. The other side of the wrench is provided with an integrally formed and protruding gear post 301. The gear post meshes with the linkage gear 6 on one side of the outer corner opening of the fixed box. The other side of the linkage gear meshes with the gear part of one end of the gear pawl 7 in the outer corner opening of the fixed box below the pointed head of the rotating plate. The pointed head of the rotating plate is bent downward and stamped into a triangle. The pawl part at the other end of the gear pawl is located below the pointed head of the rotating plate and rotates synchronously. When the gear lever is driven by the wrench and the linkage gear to extend the pointed locking head of the rotating plate out of the fixing box, the lever part of the gear lever is located inside the outer corner opening of the fixing box, behind the pointed locking head of the rotating plate. The end of the lever part of the gear lever is slightly higher than the end of the pointed locking head of the lower rotating plate, until the end of the lever part of the gear lever engages with the locking hole of the fixing plate, and then the end of the pointed locking head of the lower rotating plate engages with the locking hole of the fixing plate. The lever part of the gear lever rotates and retracts from one side of the fixing box to the other side of the fixing box.

[0031] The aforementioned fixed box contains a linkage gear, and the central shafts of the sun gear of the planetary gear and the gear section of the gear lever are arranged in a triangular configuration. The central shafts of the gear section of the gear lever and the sun gear of the planetary gear are located on one side of the fixed plate, with the central shaft of the gear section of the gear lever slightly higher and closer to the fixed plate. The center of the angle between the pointed and square clamps of the rotating wrench is 60 degrees. The angle between the inner sharp corner of the pointed wrench and the center of the square clamp is 45 degrees, slightly tilted inward by less than 5 degrees. The outer corner corresponding to the inner sharp corner of the pointed wrench is raised at a 15-degree angle to the cut edge, and the pointed wrench is slightly higher than the square clamp. The pointed and square clamps of the rotating wrench are pressed and bent upwards towards the plane of the planetary gear. The square clamp is level with the height of the planetary gear, and the pointed wrench is level with the height of the rotating wrench and extends out in an L-shape to form a triangular end. The aforementioned linkage gear's paddle portion is limited to rotating within the limiting groove 803 on the inner wall of the other side of the fixed box.

[0032] One end of the wrench is connected to the planetary gear and the rotating plate through the end head 3. The T-shaped wedge 201 at one end of the wrench is inserted into and wedged into the square groove on one side of the end head and connected to it by screws. The other end of the wrench is provided with a waist-shaped gripping hole 202. The plane between the wedge end and the gripping hole end of the wrench is aligned with the plane of the functional module placed in the cabinet and is parallel to it, forming a plate shape. The body of the wrench is a die-cast plate. The wrench has a hook 9 and a positioning element 10 on one side of the grip hole 20. The positioning element protrudes from the inner corner of the wrench on the outer side of the functional module. The hook is located in the hook hole at the end of the wrench and is fixed and swinging by a central pin and a retaining spring. One end of the hook on the outer side of the functional module extends out of the notch at the hook hole at the outer corner of the wrench, and the other end of the hook on the functional module extends out of the side edge and hook hole of the wrench. When the wrench is locked against the outer edge of the functional module, it hooks the hook groove of the functional module. The positioning element is inserted into the positioning hole on the outer edge of the functional module. A spring is provided in the hook hole on the inner side of the pressing part of the hook, or a torsion spring is provided at the pin of the hook. The waist-shaped part and the tail of the wrench where the hook and positioning element are located on one side of the grip hole protrude outwards at an angle and are higher than the side edge. The corresponding inner side of the wrench has a symmetrical angled low groove edge that is longer than the outward protrusion on the side and the hook and positioning element at the tail.

[0033] The inner ring of the planetary gear is clamped to the circular disk of the two ends and the rotating plate, respectively. The outer plane of the rotating plate is lower than the plane of the end. When the end, planetary gear and rotating plate are connected as one unit and inserted into the opening on the outer corner of the fixed box, the inner arc edge of the end that is higher than the plane of the rotating plate is in contact with the outer arc edge of the fixed box and rotates.

[0034] The aforementioned fixing box is L-shaped. The outer corner of the L-shaped fixing box has a semi-circular edge protruding outwards on the rotating side of the wrench opening. Inside the fixing box, at the outer diameter of the opening slot, on one side of the inner corner, three edges are connected, and each has a raised mounting portion 801 with a square slot smaller than the end face. Two fixing boxes are fixed to the two outer corners of the functional module via mounting portions distributed at right angles on both sides. Both wrenches are simultaneously folded towards the middle of the functional module on that side. Between the two mounting portions at the inner corner of the fixing box, there is a diagonally protruding reinforcing edge 802. The cross-section of the mounting portion at one outer end of the fixing box is larger than that at the other end. The two sides of the outer mounting portion have four symmetrical mounting holes. The other mounting portion is T-shaped and has one large mounting hole on one side and two small mounting holes on the connected side. The large cross-section mounting portion of the reinforcing edge has an extended edge on one diagonal side.

[0035] The aforementioned fixing plate is provided with three rectangular locking holes that are equidistant from top to bottom. The outer diameter of the square holes of the fixing plate is provided with outwardly protruding guide blocks 101 and reinforcing blocks 102 on both sides of the hole. The inner corner of the guide block of the fixing plate is provided with a chamfered edge. The height of the guide block is higher than the height of the reinforcing block. The pointed locking head of the rotating plate and the lever part of the gear lever rotate into or out through the corresponding hole on one side of the guide block of the fixing plate. When the wrench is rotated until the pointed locking head of the rotating plate is completely disengaged from the locking hole at the fixing plate, the square locking head of the rotating plate abuts against the outer edge of the locking hole on one side of the fixing plate.

[0036] When in use, the server host connected to the pull-out device is pushed inward together until the internal parts reach the wiring terminals (e.g., Figure 7 (As shown); after the wrench is rotated 15°, the end of the gear lever contacts the locking hole of the fixing plate, and under force, the entire server host is pushed inward (as shown). Figure 8 As shown); after the wrench is rotated 60°, the end of the gear lever disengages, and the rotating plate and gear lever continue to move the fixed plate. Due to the planetary gear reduction ratio of 1:4, the force in the later stroke is 1 / 4 of the previous force, requiring less effort (as shown). Figure 9 As shown); when the wrench is rotated 90 degrees, the entire server host is completely pushed inside (as shown). Figure 10 (As shown) After rotating the wrench outward 90°, the pointed tip of the rotating plate presses against the locking hole of the fixing plate; because the fixing plate is fixed, the entire chassis moves outward, disengaging the connector (as shown). Figure 11 As shown), the square card head of the rotating piece abuts against the outer edge of the card hole.

[0037] In summary, this connector puller is a tool used to assist in the insertion and removal of connectors. Its applications are wide-ranging, primarily in industrial and communication fields, and it is used in industrial chassis and communication equipment. This connector puller has the following advantages: 1) It increases the pulling stroke through a gear-driven paddle. Due to the planetary gear reduction ratio of 1:4 (1:3 for three equally spaced and meshing planetary gears), the force increases, resulting in a loss of some travel; 2) When the wrench is rotated to 15°, the gear-driven paddle pushes against the fixed plate to assist in the pull. When the wrench is rotated to 60°, the gear-driven paddle disengages, and the gear-driven paddle on the rotating plate pushes against the fixed plate to assist in the pull, thus completing the previously lost travel with the gear-driven paddle.

Claims

1. A stroke-enhancing puller, wherein the puller is symmetrically fixed at two end corners on the outside of a functional module (11), the wrench (2) of the puller is folded outward and inward parallel to the plane of the functional module placed in the cabinet (12), and the fixing plates (1) are equidistantly arranged on the inner side of the door frame on both sides of the cabinet; one end of the wrench is connected to the rotating plate (5) by a planetary gear (4) and is stacked in a circular shape, and is inserted into the opening on one side of the outer end corner of the fixing box (8); the central shaft of the wrench, planetary gear, and rotating plate is connected in sequence and fixed to the opening on one side of the fixing box by a rivet hinge; one side of the rotating plate is provided with two pointed clips (501) and square clips (502) that are grooved and protruding between them; characterized in that The lugs on at least two sides of the internal gear ring (401) of the planetary gear (4) are fixed to the inner wall of one side of the outer corner opening of the fixed box (8) by screws. The outer corner opening of the fixed box has a stepped side opening on one side of the rotating position of the pointed chuck (501) of the rotating plate (5), which accommodates the rotation of the pointed chuck and communicates with it. The internal gear ring of the planetary gear has four or three star wheels (402) that are equidistant and mesh with each other. The central shafts of the star wheels are respectively inserted into the disk surface of the rotating plate. The middle between the star wheels is a sun gear (403) whose outer diameter meshes with the star wheel. The square column (4031) at the center of the sun gear is connected to the square hole on one side of the wrench (2). The sun gear is the central gear and the rotating plate is the planet carrier. The other side of the wrench has an integrally formed and protruding gear column (301). The gear column is connected to the outer corner of the fixed box. The linkage gear (6) on one side of the opening meshes with the gear part of the gear pawl (7) at the outer corner of the fixed box below the tip of the rotating plate. The tip of the rotating plate is bent and punched downward into a triangle. The pawl part at the other end of the gear pawl rotates synchronously below the tip of the rotating plate. When the gear pawl is driven by the wrench and the linkage gear to extend out of the fixed box with the tip of the rotating plate, the pawl part of the gear pawl is located behind the tip of the rotating plate in the outer corner of the fixed box. The end of the pawl part of the gear pawl is slightly higher than the end of the tip of the lower rotating plate until the end of the pawl part of the gear pawl is engaged in the locking hole of the fixed plate (1) and then switched to the end of the tip of the lower rotating plate being engaged in the locking hole of the fixed plate. The pawl part of the gear pawl rotates and retracts into the other side of the fixed box.

2. The pull-out aid with increased stroke according to claim 1, characterized in that... The linkage gear (6) inside the fixed box (8), the sun gear (403) of the planetary gear (4), and the gear position center axis of the gear part of the gear paddle (7) are arranged in a triangle. The gear position center axis of the gear part of the gear paddle and the gear position center axis of the sun gear of the planetary gear are arranged on one side of the fixed plate (1). The gear position center axis of the gear part of the gear paddle is slightly higher and closer to the fixed plate.

3. The pull-out aid with increased stroke according to claim 1, characterized in that... The center of the angle between the pointed tip (501) and the square tip (502) of the rotating piece (5) is 60 degrees. The angle between the inner sharp corner of the pointed tip of the rotating piece and the center of the square tip is 45 degrees, and it is slightly inclined inward by less than 5 degrees. The outer corner corresponding to the inner sharp corner of the pointed tip of the rotating piece is raised at an angle of 15 degrees with the cut edge. The pointed tip of the rotating piece is slightly higher than the square tip.

4. The pull-out aid with increased stroke according to claim 3, characterized in that... The pointed head (501) and the square head (502) of the rotating plate (5) are punched and bent higher on one side of the planetary gear (4). The square head is level with the height of the planetary gear, and the pointed head is level with the height of the rotating plate of the wrench (2) and bends out in an L-shape to form a triangular end.

5. The pull-out aid with increased stroke according to claim 1, characterized in that... The paddle portion of the linkage gear (6) is limited to rotating within the limiting groove (803) on the inner wall of the other side of the fixed box (8).

6. The pull-out aid with increased stroke according to claim 1, characterized in that... One end of the wrench (2) is connected to the planetary gear (4) and the rotating plate (5) through the end head (3). The T-shaped wedge (201) at one end of the wrench is inserted into and wedged into the square groove on one side of the end head and connected to the wrench by screws. The other end of the wrench is provided with a waist-shaped grip hole (202). The plane between the wrench wedge end and the grip hole end is aligned with the plane of the functional module (11) placed in the cabinet (12) and is parallel to it, forming a plate shape. The body of the wrench is a die-cast plate.

7. The pull-out aid with increased stroke according to claim 6, characterized in that... The wrench (2) has a hook (9) and a positioning member (10) on one side of the grip hole (202). The positioning member is protruding at the inner corner of the wrench outside the functional module (11). The hook is set in the hook hole at the end of the wrench and is fixed and swinging by the middle pin and the snap ring. One end of the hook on the outside of the functional module extends out of the notch at the hook hole at the outer corner of the wrench. The other end of the hook on one side of the functional module extends out of the side edge and hook hole of the wrench and hooks the hook groove of the functional module when the wrench is locked and attached to the outer edge of the functional module. The positioning member is inserted into the positioning hole on the outer edge of the functional module. A spring is provided in the hook hole inside the pressing part of the hook, or a torsion spring is provided at the pin of the hook.

8. The pull-out aid with increased stroke according to claim 1, characterized in that... The inner gear ring (401) of the planetary gear (4) is clamped on both sides of the circular disk of the two ends (3) and the rotating plate (5). The outer plane of the rotating plate is lower than the plane of the end. When the end, the planetary gear and the rotating plate are connected as one and inserted into the opening on the outer corner of the fixed box (8), the inner arc edge of the end that is higher than the plane of the rotating plate is in contact with the outer arc edge of the fixed box and rotates.

9. The pull-out aid with increased stroke according to claim 8, characterized in that... The fixing box (8) is L-shaped. The wrench (2) with the opening at the outer corner of the L-shaped fixing box has a semi-circular edge that protrudes outward on the rotating side. The inner corner of the opening groove inside the fixing box is connected to three edges and has a mounting part (801) that is raised and smaller than the end face and has a square opening. The two fixing boxes are fixed to the two corners of the outer side of the functional module (11) by the mounting parts that are distributed at right angles on both sides. The wrenches on both sides are folded together towards the middle of the functional module on that side.

10. The pull-out aid with increased stroke according to claim 9, characterized in that... The fixing box (8) has a slanted reinforcing edge (802) between the two mounting parts (801) on the inner corner. The mounting part at one end of the fixing box has a larger cross section than the mounting part at the other end. The mounting part at one end of the outer side has four symmetrical mounting holes on each side. The mounting part at the other end is T-shaped and has a large mounting hole on one side and two small mounting holes on the connected side. The large cross section mounting part of the reinforcing edge has an extended edge on one slanted side.

Images