Auxiliary screw assembling and disassembling tool

Abstract

The invention belongs to the technical field of assembling and disassembling tools, and particularly relates to an auxiliary screw assembling and disassembling tool. Comprising a transmission spline shaft and a transition piece connected with the transmission spline shaft. The screw holding device comprises a fixed assembly, a movable seat, a spring and a plurality of holding claws, the fixed assembly and the movable seat sleeve the transmission spline shaft from top to bottom, the fixed assembly and the transmission spline shaft are relatively fixed, the spring sleeves the outer side of the transmission spline shaft, and the two ends of the spring abut against the movable seat and a shaft shoulder of the transmission spline shaft respectively; the movable base abuts against the fixing assembly under the elastic force effect of the spring. The multiple holding claws are distributed in the circumferential direction and rotationally installed at the lower end of the movable base, and the multiple holding claws are engaged with the transmission spline shaft through tooth structures. When the transmission spline shaft rotates, the holding claws are driven to swing to hold or release the screws. In the application process, the screw or the screw and gasket combination can be effectively prevented from falling off, and the device is simple in structure, convenient to operate and easy to maintain.

Description

Technical Field

[0001] This invention belongs to the field of loading and unloading tools, and specifically relates to an auxiliary screw loading and unloading tool. Background Technology

[0002] During the assembly and disassembly of machinery or the installation and disassembly of equipment, it is inevitable to encounter problems such as the installation location being far from the installer, the installation location being narrow, or the installation surface being hot. In such cases, workers need to use other tools or homemade tools to complete the loading and unloading work. The most common method is to weld an extension rod to the wrench to increase the operating distance. However, this method can only solve the loading and unloading problem of a single type of screw, and the screws and washers are very easy to fall off during the loading and unloading process. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide an auxiliary screw installation and removal tool to solve the problems of narrow, long-distance installation and washer screw falling off.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This invention provides an auxiliary screw loading and unloading tool, comprising:

[0006] Loading and unloading the drive shaft system, including the drive spline shaft and the transition piece detachably connected to the lower end of the drive spline shaft;

[0007] The screw clamping device includes a fixed component, a movable seat, a spring, and multiple clamping claws. The fixed component and the movable seat are mounted on the drive spline shaft from top to bottom. The fixed component is fixed relative to the drive spline shaft. The spring is sleeved on the outside of the drive spline shaft, and its two ends abut against the shoulders of the movable seat and the drive spline shaft, respectively. The movable seat abuts against the fixed component under the elastic force of the spring. The multiple clamping claws are distributed circumferentially and rotatably mounted on the lower end of the movable seat. The multiple clamping claws are engaged with the drive spline shaft through a toothed structure. When the drive spline shaft rotates, it drives the clamping claws to swing, causing the clamping claws to clamp or release the screw.

[0008] The transmission spline shaft is a stepped shaft, comprising a drive shaft section, a threaded section, a smooth shaft section, and a spline shaft section arranged from top to bottom, wherein the diameters of the drive shaft section, the smooth shaft section, and the spline shaft section increase sequentially.

[0009] The threaded section has a cutting plane, and multiple bushing positioning grooves are provided on the cutting plane along the height direction.

[0010] The fixing component includes an elastic adjusting nut and a limiting bushing arranged vertically. The elastic adjusting nut is threadedly connected to the threaded section of the transmission spline shaft. The inner wall of the limiting bushing is provided with a bushing positioning bead for positioning and connecting with the transmission spline shaft. The lower end of the limiting bushing is symmetrically provided with a slotted limiting structure.

[0011] The groove limiting structure of the limiting bushing includes an open groove, the bottom of which is provided with a stepped surface, and the stepped surface is provided with reverse teeth.

[0012] The movable seat includes a limiting seat and a gripper mounting seat. The lower end of the limiting seat is detachably connected to the gripper mounting seat. The top of the limiting seat is symmetrically provided with two limiting protrusions, and the top of the limiting protrusions is provided with ratchet teeth.

[0013] The gripper includes a gear, a connecting rod, and a clamping jaw. The gear is mounted on the bottom of the movable seat via a gripper rotation shaft and meshes with the splined shaft section of the transmission splined shaft. The upper end of the connecting rod is fixedly connected to the gear, and the lower end of the connecting rod is connected to the clamping jaw. The clamping jaw swings as the gear rotates.

[0014] The inner side of the gripper is provided with a wedge surface, which is used to extend into the gap between the washer and the zero plane during screw disassembly, thereby picking up the screw-washer assembly.

[0015] The spline shaft section of the transmission spline shaft is provided with a mounting hole along the axial direction. The side wall of the mounting hole is provided with a transition positioning bead. The transition bead is inserted into the mounting hole on the spline shaft section and is positioned by the transition positioning bead.

[0016] The drive shaft section of the transmission spline shaft is a regular polyhedral structure, and the regular polyhedral structure is matched with a corresponding wrench.

[0017] The advantages and beneficial effects of this invention are as follows: This invention provides an auxiliary screw loading and unloading tool that uses an extended rod to achieve screw loading and unloading work over long distances. It has a compact structure and can be used in confined spaces. This invention also adopts a simple mechanical structure, which facilitates repair and maintenance.

[0018] This invention employs a screw clamping method, which provides axial force to ensure that the axial direction of the screw or screw assembly is the same as the axial direction of the screw loading and unloading tool, facilitating hole operation; it also provides lifting force, which can effectively prevent the separation of the screw washer. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an auxiliary screw loading and unloading tool according to the present invention;

[0020] Figure 2 This is a top view of an auxiliary screw loading and unloading tool according to the present invention;

[0021] Figure 3 for Figure 1 AA section view;

[0022] Figure 4 for Figure 3 BB section view;

[0023] Figure 5This is a schematic diagram of the transmission spline shaft in this invention;

[0024] Figure 6 This is a schematic diagram of the limiting bushing in this invention;

[0025] Figure 7 for Figure 6 CC section view;

[0026] Figure 8 for Figure 6 Top view;

[0027] Figure 9 This is a schematic diagram of the limiting seat in the present invention;

[0028] Figure 10 for Figure 9 DD sectional view;

[0029] Figure 11 for Figure 9 Top view;

[0030] Figure 12 This is a schematic diagram of the gripper structure in this invention;

[0031] Figure 13 for Figure 12 Top view;

[0032] Figure 14 This is a schematic diagram of the structure of an auxiliary screw loading and unloading tool of the present invention when the screw washer assembly is not clamped;

[0033] Figure 15 This is a schematic diagram of the structure of the auxiliary screw loading and unloading tool of the present invention when it clamps the screw washer assembly;

[0034] Figure 16 This is a schematic diagram of the structure of an auxiliary screw loading and unloading tool of the present invention during disassembly.

[0035] In the diagram: 1 is the screw clamping device; 2 is the loading and unloading transmission shaft system; 3 is the wrench; 4 is the spring adjusting nut; 5 is the limiting bushing; 501 is the open slot; 502 is the reverse tooth; 503 is the positioning bead mounting hole; 6 is the bushing positioning bead; 7 is the limiting seat; 701 is the limiting protrusion; 702 is the ratchet; 8 is the spring; 9 is the claw mounting seat; 10 is the claw rotating shaft; 11 is the claw; 111 is the gear; 112 is the connecting rod; 113 is the gripper; 114 is the wedge surface; 12 is the transmission spline shaft; 121 is the drive shaft section; 122 is the threaded section; 123 is the bushing positioning groove; 124 is the smooth shaft section; 125 is the spline shaft section; 13 is the transition piece positioning bead; 14 is the transition piece. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] See Figures 1 to 4 As shown, this invention provides an auxiliary screw loading and unloading tool, including a screw clamping device 1 and a loading and unloading transmission shaft system 2. The loading and unloading transmission shaft system 2 includes a transmission spline shaft 12 and a transition piece 14 detachably connected to the lower end of the transmission spline shaft 12. The transition piece 14 is matched according to different screw models. The screw clamping device 1 includes a fixed component, a movable seat, a spring 8, and multiple clamping claws 11. The fixed component and the movable seat are mounted on the transmission spline shaft 12 from top to bottom. The fixed component is fixed relative to the transmission spline shaft 12. The spring 8 is sleeved on the outside of the transmission spline shaft 12, and its two ends abut against the shoulders of the movable seat and the transmission spline shaft 12, respectively. The movable seat abuts against the fixed component under the elastic force of the spring 8. The multiple clamping claws 11 are distributed circumferentially and are rotatably mounted on the lower end of the movable seat. The multiple clamping claws 11 are all engaged with the transmission spline shaft 12 through a tooth structure. When the transmission spline shaft 12 rotates, it drives the clamping claws 11 to swing, so that the clamping claws 11 clamp or release the screw.

[0038] See Figure 5 As shown, in an embodiment of the present invention, the transmission spline shaft 12 is a stepped shaft, including a drive shaft section 121, a threaded section 122, a smooth shaft section 124 and a spline shaft section 125 arranged from top to bottom. The diameters of the drive shaft section 121, the smooth shaft section 124 and the spline shaft section 125 increase sequentially. The transmission spline shaft 12 can be made in different lengths according to different usage environments.

[0039] Furthermore, the threaded section 122 has a cutting plane, which restricts the rotation of the limiting sleeve 5 on the transmission spline shaft 12. Multiple sleeve positioning grooves 123 are provided along the height direction on the cutting plane. The sleeve positioning grooves 123 are circular limiting grooves, providing positioning positions for the sleeve positioning beads 6. Simultaneously, the sleeve positioning grooves 123 also provide adjustment positions for different screws by the operator. The spline shaft section 125 of the transmission spline shaft 12 has an axial mounting hole. A transition piece positioning bead 13 is provided on the side wall of the mounting hole. The transition piece 14 is inserted into the mounting hole on the spline shaft section 125 and positioned by the transition piece positioning bead 13. The mounting hole is an internal hexagonal hole, providing an assembly position for the transition piece 14. Under the action of the transition piece positioning bead 13, the transition piece 14 is mounted on the transmission spline shaft 12 without falling off, and the transition piece 14 can be replaced according to different bolts.

[0040] Specifically, the transition piece positioning bead 13 is a standard component, a mechanical accessory that achieves "elastic positioning" through spring force. It can be used for temporary fixing and locking of components. The positioning pin enables the detachable positioning constraint of the transition piece 14. Positioning holes are machined on each surface at the same height where the transition piece 14 contacts the transition piece positioning bead 13. The machining of positioning holes on each surface allows for replacement without observing the position of the positioning bead during installation. The transition piece positioning bead 13 cooperates with the positioning holes to limit the movement and prevent the transition piece 14 from falling off.

[0041] Furthermore, the drive shaft section 121 of the transmission spline shaft 12 is a positive polyhedral structure, and the positive polyhedral structure is matched with a corresponding wrench 3, which can be a regular wrench or a ratchet wrench.

[0042] See Figure 3 As shown, in an embodiment of the present invention, the fixing component includes an elastic adjusting nut 4 and a limiting bushing 5 arranged vertically. The elastic adjusting nut 4 is threadedly connected to the threaded section 122 of the transmission spline shaft 12. The position of the screw clamping device 1 on the transmission shaft system 2 is adjusted by rotating the elastic adjusting nut 4. The limiting bushing 5 is located below the elastic adjusting nut 4 and can move up and down with the elastic adjusting nut 4. The inner wall of the limiting bushing 5 is provided with a bushing positioning bead 6 for positioning and connecting with the transmission spline shaft 12. The bushing positioning bead 6 plays the role of positioning and limiting the bushing 5. The lower end of the limiting bushing 5 is symmetrically provided with a slot limiting structure.

[0043] See Figures 6-8 As shown, in an embodiment of the present invention, the groove limiting structure of the limiting bushing 5 includes an opening groove 501, the bottom of the opening groove 501 is provided with a stepped surface, the stepped surface is provided with a reverse tooth 502, and one side of the stepped surface is an elongated hole, which provides an insertion space for the protruding part of the limiting seat 7.

[0044] The inner hole of the limiting bushing 5 is not a complete circle, and the machined plane on one side matches the plane at the thread of the transmission spline shaft 12. When the limiting bushing 5 is assembled onto the transmission spline shaft 12, the existence of the plane means that the limiting bushing 5 can only move up and down axially. The positioning bead mounting hole 503 is machined on the plane. Under the action of the bushing positioning bead 6, the limiting bushing 5 can be positioned on the transmission spline shaft 12. At the same time, the bushing positioning groove 123 on the transmission spline shaft 12 can mark the position that different screw mechanisms should be adjusted. The bottom part of the spline of the transmission spline shaft 12 retains a section of unmachined spline, which serves as a limit and prevents the screw clamping device 1 from disengaging from the transmission spline shaft 12 during the operation of the auxiliary screw loading and unloading tool.

[0045] Specifically, the elastic adjusting nut 4 is a knurled nut. By rotating it, its position on the power transmission spline shaft 12 is adjusted, thereby adjusting the position of the entire screw clamping device on the loading and unloading transmission shaft system 2, so as to adapt to the clamping work of different screws.

[0046] SeeFigure 3 , Figures 9 to 11 As shown in the embodiment of the present invention, the movable seat includes a limiting seat 7 and a gripper mounting seat 9. The lower end of the limiting seat 7 is detachably connected to the gripper mounting seat 9 by tightening with screws and nuts. The top of the limiting seat 7 is symmetrically provided with two limiting protrusions 701, and the top of the limiting protrusions 701 is provided with ratchet teeth 702. The limiting protrusions 701 match the elongated holes at the ends of the limiting bushings 5; the ratchet teeth 702 machined on the upper part of the limiting protrusions 701 match the countersunk teeth 502 of the limiting bushings 5. The countersunk teeth can ensure that the structure does not rotate after the clamping screws are assembled.

[0047] See Figure 12 and Figure 13 As shown in the embodiment of the present invention, the gripper 11 includes a gear 111, a connecting rod 112, and a clamping jaw 113. The gear 111 is mounted on the bottom of the movable seat via the gripper rotating shaft 10, and meshes with the splined shaft section 125 of the transmission splined shaft 12. The upper end of the connecting rod 112 is fixedly connected to the gear 111, and the lower end of the connecting rod 112 is connected to the clamping jaw 113. The clamping jaw 113 swings as the gear 111 rotates. The module of the gear 111 is the same as the spline module of the splined shaft section 125 of the transmission splined shaft 12. The two cooperate with each other, allowing the gripper 11 to rotate on the mechanism. When the screw clamping device 1 moves up and down as a whole, it can slide within the splined groove of the transmission splined shaft 12.

[0048] Furthermore, the inner side of the clamp 113 is beveled to form a wedge 113, making the edge thinner; during the process of removing the screw, the thin edge of the wedge 113 can easily extend into the gap between the washer and the zero plane, thereby lifting the entire screw washer assembly.

[0049] In this embodiment, the spring 8 is installed between the transmission spline shaft 12 and the claw mounting seat 9. When the screw or screw washer assembly is placed on the transition piece 14 manually, it can ensure that the entire screw clamping device 1 is in a high position for easy manual operation. When clamping, the spring 8 provides a certain supporting force to make the screw contact the transition piece 14 tightly.

[0050] In this embodiment, the upper part of the tool is equipped with a wrench 3 and three grippers 11, which are evenly distributed.

[0051] See Figure 14 As shown, when the screw washer assembly is not tightened, the two limiting protrusions 701 of the limiting seat 7 extend into the two elongated holes of the limiting bushing 5, and at this time the three grippers 11 are in the highest position.

[0052] See Figure 15As shown, in the screw clamping device 1, except for the spring-loaded adjusting nut 4 and the limiting bushing 5, the rest of the device moves downward to the clamping position, that is, the gripper 113 of the clamping claw 11 is located below the screw washer assembly. At this time, the two limiting protrusions 701 of the limiting seat 7 disengage from the two elongated holes of the limiting bushing 5. Rotating the limiting seat 7 causes the ratchet 702 on the limiting protrusion 701 to engage with the reverse teeth 502 of the limiting bushing 5, thereby fixing the limiting seat 7 and the limiting bushing 5 circumferentially. By rotating the transmission spline shaft 12 with the wrench 3, under the meshing of the toothed structure of the transmission spline shaft 12 and the clamping claw 11, the gripper 113 at the lower part of the clamping claw 11 rotates towards the center, thereby clamping the screw assembly. At this time, when the screw washer assembly is clamped, the highest part of the limiting bushing 5 contacts the stepped surface with reverse teeth of the limiting seat 7, and all three clamping claws 11 clamp the screw assembly simultaneously.

[0053] See Figure 15 As shown, screw removal utilizes the wedge surface 113 of the claw 11 to grip the screw assembly.

[0054] This invention provides an auxiliary screw loading and unloading tool, the working process of which is as follows:

[0055] 1. Preparation: The mechanism is reset, and the limiting protrusion 701 of the limiting seat 7 extends into the elongated hole of the limiting bushing 5. The user replaces the transition piece 14 according to the size of the assembly screws and adjusts the spring adjusting nut 4 so that the whole mechanism meets the requirements of the clamping screw washer combination.

[0056] 2. Tightening operation: Install the screw or screw washer assembly onto the transition piece 14. The screw clamping device 1, except for the spring adjusting nut 4 and the limiting bushing 5, moves downward as a whole, so that the upper surface of the gripper 113 of the clamping claw 11 is below the plane of the washer. Rotate the transmission spline shaft 12, and the gripper 11 clamps the screw. Under the action of the spring 8, the screw clamping device 1 moves upward a small distance to clamp the washer. Under the action of the limiting bushing 5 and the back teeth of the limiting seat 7, the mechanism maintains the clamping force. Align the auxiliary screw loading and unloading tool with the threaded hole and send the screw into the threaded hole. Tighten the screw into the threaded hole a certain distance, release the screw clamping device 1 to return it to the initial position, and continue the tightening operation. Repeat this process until the assembly operation is completed.

[0057] 3. Disassembly operation: Replace the transition piece 14 according to the size of the assembly screw. With the mechanism reset, use a tool to loosen the screw to create a gap between the washer and the surface of the component. Move the screw clamping device 1 down so that the wedge surface 113 of the clamp 113 is in close contact with the surface of the component. Rotate the transmission spline shaft 12 and use the clamp 113 of the clamp 111 to clamp the washer. Continue the disassembly operation until the screw washer is removed from the threaded hole. Remove the screw washer assembly manually and remove it from the tool. Reset the mechanism and repeat the operation until the disassembly operation is completed.

[0058] This invention provides an auxiliary screw loading and unloading tool, suitable for loading and unloading screws in specific environments, such as confined assembly spaces, high-temperature mounting surfaces, or other situations requiring long-distance loading and unloading. During application, this tool effectively prevents screws or screw-washer assemblies from falling off. It features a simple structure, is easy to operate, and is easy to maintain.

[0059] The above description is merely an embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, extensions, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. An auxiliary screw dismounting tool, characterized in that, The utility model relates to a detachable screw clamping device for transmission shaft system, comprising: a detachable transmission shaft system (2) comprising a transmission spline shaft (12) and a transition piece (14) detachably connected to the lower end of the transmission spline shaft (12); a screw clamping device (1) comprising a fixed assembly, a movable seat, a spring (8) and a plurality of clamping claws (11), wherein the fixed assembly and the movable seat are sleeved on the transmission spline shaft (12) from top to bottom, the fixed assembly is fixed relative to the transmission spline shaft (12), the spring (8) is sleeved on the outer side of the transmission spline shaft (12) and abuts against the shaft shoulder of the transmission spline shaft (12) at both ends, and the movable seat abuts against the fixed assembly under the action of the spring (8); the plurality of clamping claws (11) are distributed in the circumferential direction and are rotatably installed at the lower end of the movable seat, and the plurality of clamping claws (11) are engaged with the transmission spline shaft (12) through a tooth structure; when the transmission spline shaft (12) rotates, the clamping claws (11) are swung to clamp or release the screw.

2. The supplemental screwdriver tool of claim 1, wherein, The transmission spline shaft (12) is a stepped shaft comprising a driving shaft segment (121), a threaded segment (122), a smooth shaft segment (124) and a spline shaft segment (125) arranged from top to bottom, wherein the diameters of the driving shaft segment (121), the smooth shaft segment (124) and the spline shaft segment (125) increase in turn.

3. The supplemental screwdriver tool of claim 2, wherein, The threaded segment (122) is provided with a cut plane, and a plurality of shaft sleeve positioning grooves (123) are arranged on the cut plane in the height direction.

4. The supplemental screwdriver tool of claim 2, wherein, The fixed assembly comprises an elastic force adjusting nut (4) and a limiting shaft sleeve (5) arranged in sequence from top to bottom, wherein the elastic force adjusting nut (4) is threadedly connected with the threaded segment (122) of the transmission spline shaft (12), the inner wall of the limiting shaft sleeve (5) is provided with a shaft sleeve positioning bead (6) for positioning and connecting with the transmission spline shaft (12), and the lower end of the limiting shaft sleeve (5) is symmetrically provided with a notch limiting structure.

5. The supplemental screwdriver tool of claim 4, wherein, The notch limiting structure of the limiting shaft sleeve (5) comprises an open slot (501), the bottom of the open slot (501) is provided with a stepped surface, and the stepped surface is provided with an inverted tooth (502).

6. The supplemental screwdriver tool of claim 2, wherein, The movable seat comprises a limiting seat (7) and a clamping claw mounting seat (9), wherein the lower end of the limiting seat (7) is detachably connected with the clamping claw mounting seat (9), the top of the limiting seat (7) is symmetrically provided with two limiting protrusions (701), and the top of the limiting protrusion (701) is provided with a ratchet tooth (702).

7. The supplemental screwdriver tool of claim 2, wherein, The clamping claw (11) comprises a gear (111), a connecting rod (112) and a clamping jaw (113), wherein the gear (111) is installed at the bottom of the movable seat through a clamping claw rotating shaft (10), the gear (111) is engaged with the spline shaft segment (125) of the transmission spline shaft (12), the upper end of the connecting rod (112) is fixedly connected with the gear (111), the lower end of the connecting rod (112) is connected with the clamping jaw (113), and the clamping jaw (113) swings with the rotation of the gear (111).

8. The supplemental screwdriver tool of claim 7, wherein, The inner side of the clamping jaw (113) is provided with a wedge surface (113) for extending into the gap between the gasket and the plane of the part during the screw dismounting process, thereby clamping the screw gasket combination.

9. The supplemental screwdriver tool of claim 2, wherein, The spline shaft section (125) of the transmission spline shaft (12) is provided with a mounting hole in the axial direction, and the side wall of the mounting hole is provided with a transition part positioning bead (13), the transition part (14) is inserted into the mounting hole on the spline shaft section (125) and is positioned by the transition part positioning bead (13).

10. The supplemental screwdriver tool of claim 2, wherein, The driving shaft section (121) of the transmission spline shaft (12) is a regular polyhedral column structure, and the regular polyhedral column structure matches a corresponding wrench (3).

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