Disassembly and assembly auxiliary tool and disassembly and assembly device

Abstract

The utility model discloses a dismounting auxiliary tool and a dismounting device, the dismounting auxiliary tool comprises a tool main body and a stress part, the tool main body is provided with a matching groove, the matching groove is used for being matched with a strip-shaped head in a fastener, the stress part is connected with the tool main body, and the stress part is used for being matched with a tool head in an electric rotating tool, the matching groove is matched with the strip-shaped head, and when the stress part rotates, the tool body rotates along with the stress part, and the tool body drives the strip-shaped head to rotate. In the embodiment of the utility model, the disassembly and assembly of the fastener can be realized through the matching of the disassembly and assembly auxiliary tool and the electric rotating tool, and the fastener does not need to be manually tightened and unscrewed, so that the labor intensity of operators can be reduced, and the disassembly and assembly efficiency of the fastener is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fastener dismounting technical field especially relates to a dismounting auxiliary tool and dismounting device. BACKGROUND

[0002] The screw usually includes a screw rod and a screw head, the screw rod has external threads, the screw rod is used for being connected with an internally threaded part, such as a threaded hole, the screw head is used for the force operation of a tool or an operator.

[0003] For the T-shaped screw with the shape of the screw head being a character, when dismounting, since the existing electric torque tool is difficult to match the character-shaped screw head, therefore, the artificial tightening and loosening mode is usually adopted.

[0004] However, the artificial tightening and loosening mode has the larger labor intensity of the operator, and the dismounting efficiency of the screw is lower. INNOVATION CONTENT

[0005] The utility model provides a dismounting auxiliary tool and dismounting device, aims at at least solving the technical problem of the lower dismounting efficiency of the screw in the artificial tightening and loosening mode in the prior art.

[0006] In the first aspect of the utility model implementation, first provide a kind of dismounting auxiliary tool, comprising:

[0007] Tool body has cooperating groove, the cooperating groove is used to cooperate with the strip-shaped head in fastener;

[0008] Stress part is connected with the tool body, and the stress part is used to cooperate with the tool head in electric rotary tool;

[0009] Wherein, the cooperating groove cooperates with the strip-shaped head, and when the stress part rotates, the tool body rotates with the stress part, and the tool body drives the strip-shaped head to rotate.

[0010] Optionally, the dismounting auxiliary tool has rotation axis, when the cooperating groove cooperates with the strip-shaped head, the center point of the strip-shaped head and the center point of the stress part are located on the rotation axis.

[0011] Optionally, the tool body includes end plate, the end plate is located at the side of the cooperating groove away from the slot of the cooperating groove, and the stress part is connected with the end plate.

[0012] Optionally, the tool body includes the shell connected with the end plate, the shell and the end plate enclose the cooperating groove, and the shape of the cross section of the cooperating groove and the shell is circular.

[0013] The strip-shaped head has two first sides arranged oppositely along the length direction of the strip-shaped head and two second sides arranged oppositely along the thickness direction of the strip-shaped head, and the side wall of the matching groove is used for gap matching with the first side in the strip-shaped head;

[0014] The tool body comprises a stopper arranged on the shell and / or the end plate, the matching groove is matched with the strip-shaped head, and the stopper is in contact with the second side in the strip-shaped head when the tool body rotates, and the tool body drives the strip-shaped head to rotate through the stopper.

[0015] Optionally, the stopper comprises at least one stopper rib extending along the depth direction of the matching groove.

[0016] Optionally, the number of the stopper ribs is at least two.

[0017] The at least two stopper ribs are arranged at intervals along the circumference of the shell, and the interval distance of any two adjacent stopper ribs is greater than the thickness of the strip-shaped head.

[0018] When the matching groove is matched with the strip-shaped head, the at least two stopper ribs are respectively located on both sides of the strip-shaped head along the thickness direction of the strip-shaped head.

[0019] Optionally, at least one hollow hole is arranged on the end plate.

[0020] The hollow hole penetrates through the end plate along the thickness direction of the end plate, and the hollow hole is in communication with the matching groove.

[0021] Optionally, the depth of the matching groove is greater than or equal to the width of the strip-shaped head.

[0022] Optionally, the length direction of the stress part is parallel to the depth direction of the matching groove, and the cross section of the stress part is circular.

[0023] In the second aspect of the embodiment of the utility model, a dismounting and mounting device is also provided, which comprises an electric rotary tool and the above-mentioned dismounting and mounting auxiliary tool.

[0024] The utility model discloses a cooperation groove and strip head cooperation, the tool head in the electric rotary tool and stress part cooperation, the tool head in the electric rotary tool rotates, and the tool head will drive stress part rotation, and stress part rotation drives tool main body rotation, and tool main body rotation drives strip head rotation, and strip head rotates whole fastener rotation, thereby can realize the disassembly of fastener. The utility model discloses an embodiment, through the cooperation of dismounting auxiliary tool and electric rotary tool, can realize the disassembly of fastener, need not manual screwing and unscrewing fastener, thereby can alleviate the labor intensity of operator, improve the disassembly efficiency of fastener, and further can improve production efficiency. In addition, through electric rotary tool and dismounting auxiliary tool and fastener are screwed, can ensure that fastener is screwed in place, avoids fastener loosening in use. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the embodiment or prior art description needed to use the drawing briefly introduce.

[0026] Figure 1 For the structure schematic diagram of fastener provided in the embodiment of the utility model;

[0027] Figure 2 For the structure schematic diagram of dismounting auxiliary tool provided in the embodiment of the utility model Figure 1 ;

[0028] Figure 3 For the structure schematic diagram of dismounting auxiliary tool provided in the embodiment of the utility model Figure 2 ;

[0029] Figure 4 For the structure schematic diagram of dismounting auxiliary tool provided in the embodiment of the utility model Figure 3 ;

[0030] Figure 5 For the structure schematic diagram of dismounting auxiliary tool and fastener cooperation provided in the embodiment of the utility model.

[0031] Reference signs:

[0032] 1-tool main body, 11-cooperation groove, 111-side wall, 12-end plate, 121-hollow hole, 13-housing, 14-stop portion, 141-stop rib, 2-stress part, 3-fastener, 31-strip head, 311-first side, 312-second side, 32-rod part. DETAILED DESCRIPTION

[0033] The technical scheme in the embodiment of the utility model will be described below in conjunction with the drawings in the embodiment of the utility model.

[0034] The embodiments of the present application are used for explaining the present application, and are not used for limiting the scope of the present application. The present application is described in more detail in the following paragraphs with reference to the drawings. It should be noted that the drawings are in a very simplified form and all use non-precise proportions, and are only used for the purpose of conveniently and clearly assisting the description of the embodiments of the present application.

[0035] For the T-shaped screw with a linear shape of the screw head, during disassembly, the existing electric torque tool is difficult to match with the linear screw head, and thus the manual tightening and loosening mode is usually adopted. However, the manual tightening and loosening mode has a large labor intensity of the operator and a low disassembly efficiency of the screw. In order to solve the above problems, the embodiments of the present application provide a disassembly auxiliary tool and a disassembly device, and the disassembly auxiliary tool and the disassembly device mentioned above are described in detail below.

[0036] In a first aspect, with reference to Figures 1 to 5 The disassembly auxiliary tool provided by the embodiments of the present application comprises a tool body 1 and a stress receiving part 2. The tool body 1 has a matching groove 11 for matching with a strip-shaped head 31 in a fastener 3. The stress receiving part 2 is connected with the tool body 1 and is used for matching with an electric rotary tool. The matching groove 11 matches with the strip-shaped head 31, and when the stress receiving part 2 rotates, the tool body 1 rotates with the stress receiving part 2, and the tool body 1 drives the strip-shaped head 31 to rotate.

[0037] The disassembly auxiliary tool is used for matching with the electric rotary tool to realize the disassembly of the fastener 3. The fastener 3 can be used for connecting a coating tool with a front cover of a vehicle or a rear cover of a vehicle. The fastener 3 is a T-shaped screw with a linear shape of the screw head. The fastener 3 comprises the strip-shaped head 31 and a rod part 32 connected with the strip-shaped head 31. The strip-shaped head 31 is the screw head of the fastener 3. The rod part 32 has an external thread. The coating tool has a mounting hole. The front cover of the vehicle or the rear cover of the vehicle has a threaded hole. The fastener 3 is threadedly connected with the threaded hole in the front cover of the vehicle or the rear cover of the vehicle through the mounting hole in the coating tool.

[0038] In the coating process of the front cover of the vehicle or the rear cover of the vehicle, the coating tool is connected with the front cover of the vehicle or the rear cover of the vehicle through the fastener 3 to ensure the stability and safety of the front cover of the vehicle or the rear cover of the vehicle during the coating process, and to avoid damage caused by movement or bumping of the front cover of the vehicle or the rear cover of the vehicle. The coating tool can be repeatedly used. When the coating tool is used, it needs to be connected with the front cover of the vehicle or the rear cover of the vehicle through the fastener 3. When the coating tool is disassembled, the corresponding fastener 3 needs to be disassembled. A single coating tool is usually connected with the front cover of the vehicle or the rear cover of the vehicle through 2-4 fasteners 3.

[0039] The electric rotary tool is a kind of tool equipment which utilizes electric energy to drive a motor, and outputs rotary torque through the rotary motion of the motor for tightening, loosening and other operations. As an example, the force receiving part 2 is of solid structure or hollow structure, and the tool head can include a matching hole for matching with the outer surface of the force receiving part 2 or a clamping component for clamping the force receiving part 2. As another example, the force receiving part 2 has a plug hole, and the tool head can include a plug rod matched with the plug hole, and the cross-sectional shape of the plug hole can be square, hexagonal, cross-shaped, one-stroke-shaped and the like.

[0040] The matching groove 11 includes a strip-shaped area, i.e. the area where the strip-shaped head 31 is actually placed, and the shape and size of the strip-shaped area are consistent with those of the strip-shaped head 31. The cross-sectional shape of the matching groove 11 can be circular, and in this case, the matching groove 11 includes a plurality of strip-shaped areas, one of which can be referred to as the area shown in FIG. 1D. Figure 4 The matching groove 11 can include only one strip-shaped area, and in this case, the cross-sectional shape of the matching groove 11 is long strip-shaped. The matching groove 11 can include two intersecting strip-shaped areas, and in this case, the cross-sectional shape of the matching groove 11 can be cross-shaped.

[0041] The matching mode of the strip-shaped groove 11 and the strip-shaped head 31 can be gap matching or interference fitting. The connection mode of the force receiving part 2 and the tool body 1 can be fixed connection, such as welding, bonding and the like. The connection mode of the force receiving part 2 and the tool body 1 can also be bolt connection.

[0042] As an example, when the tool body 1 rotates, the strip-shaped head 31 is driven to rotate through other structures, such as a stopper, in addition to the side wall of the matching groove 11. As another example, when the tool body 1 rotates, the strip-shaped head 31 is driven to rotate through the side wall of the matching groove 11, for example, when the cross-sectional shape of the matching groove 11 is long strip-shaped, the strip-shaped head 31 is driven to rotate through the side wall of the matching groove 11 when the tool body 1 rotates.

[0043] In the embodiment of the utility model, the matching groove 11 matches with the strip-shaped head 31, the tool head in the electric rotary tool matches with the force receiving part 2, when the tool head in the electric rotary tool rotates, the tool head drives the force receiving part 2 to rotate, the force receiving part 2 drives the tool body 1 to rotate, the tool body 1 drives the strip-shaped head 31 to rotate, when the strip-shaped head 31 rotates, the whole fastener 3 rotates, thereby can realize the disassembly of fastener 3. In the embodiment of the utility model, through the cooperation of the disassembly auxiliary tool and the electric rotary tool, the disassembly of fastener 3 can be realized, without manually tightening and loosening fastener 3, thereby can reduce the labor intensity of operator, improve the disassembly efficiency of fastener 3, and further improve the production efficiency.

[0044] Due to the vibration generated during the operation of the equipment and the change of the high and low temperature of the oven, the fastener 3 cooperated with the coating tooling is prone to loosen. In the embodiment of the utility model, the fastener 3 is tightened by the electric rotary tool and the dismounting auxiliary tool, which can ensure that the fastener 3 is tightened in place and avoid loosening of the fastener 3 during use.

[0045] In an optional embodiment of the utility model, the dismounting auxiliary tool has a rotation axis, and when the strip-shaped head 31 cooperates with the matching groove 11, the center point of the strip-shaped head 31 and the center point of the stress part 2 are located on the rotation axis.

[0046] Among them, the rotation axis refers to the straight line around which all the motion points of an object rotate in the rotational motion. The center point refers to the geometric center of the object. The rotation axis of the dismounting auxiliary tool can refer to the line shown by the C arrow in Figure 2 and Figure 3 . Since the center point of the stress part 2 is located on the rotation axis, after the tool head in the electric rotary tool correctly cooperates with the stress part 2, the center point of the tool head is on the extension line of the rotation axis. After the strip-shaped head 31 correctly cooperates with the matching groove 11, the center point of the strip-shaped head 31 is located on the rotation axis, so the center point of the fastener 3 is on the extension line of the rotation axis.

[0047] During the dismounting process of the fastener 3, if the center point of the tool head in the electric rotary tool is not aligned with the center point of the fastener 3, and the deviation is large, when the electric rotary tool rotates, the fastener 3 is prone to large swing amplitude due to inertia and centrifugal force, which will cause the fastener 3 to be difficult to be correctly tightened and need to be reworked and tightened. In the embodiment, when the matching groove 11 cooperates with the strip-shaped head 31, the center point of the stress part 2 and the center point of the strip-shaped head 31 are on the rotation axis, so during the dismounting process of the fastener 3, the center point of the tool head in the electric rotary tool can be aligned with the center point of the fastener 3, so that the fastener 3 can be correctly tightened.

[0048] In an optional embodiment of the utility model, the tool body 1 includes an end plate 12, the end plate 12 is located on the side of the matching groove 11 away from the slot opening of the matching groove 11, and the stress part 2 is connected with the end plate 12. In this embodiment, the stress part 2 has a simple structure and will not affect the insertion of the strip-shaped head 31.

[0049] In an optional embodiment of the utility model, the tool body 1 includes the shell 13 connected with the end plate 12, the shell 13 and the end plate 12 enclose the cooperation groove 11, the shape of the cross section of cooperation groove 11 and shell 13 is circular;The strip-shaped head 31 has two first side surfaces 311 oppositely arranged along the length direction of strip-shaped head 31 and two second side surfaces 312 oppositely arranged along the thickness direction of strip-shaped head 31, and the side wall 111 of cooperation groove 11 is used for gap cooperation with the first side surface 311 in strip-shaped head 31;The tool body 1 includes the stopper 14 arranged on the shell 13 and / or end plate 12, cooperation groove 11 cooperates with strip-shaped head 31, and when the tool body 1 rotates, the stopper 14 contacts the second side surface 312 in strip-shaped head 31, and the tool body 1 drives strip-shaped head 31 to rotate through the stopper 14.

[0050] Wherein, the shape of the cross section of cooperation groove 11 is circular, the shape of the cross section of shell 13 is circular, and the shape of the end plate 12 is preferably circular. The cross section of cooperation groove 11 is perpendicular to the depth direction of cooperation groove 11, the depth direction of cooperation groove 11 is parallel to the length direction of tool body 1, and the length direction of tool body 1 can refer to the direction shown by the A arrow in Figure 2 And Figure 3 The cross section of shell 13 and the cross section of end plate 12 are parallel to the length direction of tool body 1. The shape of the cross section of cooperation groove 11 and shell 13 is circular, the circular has rotational symmetry, and the uniformity of stress and rotation stability of dismounting auxiliary tool during rotation can be ensured.

[0051] The diameter of cooperation groove 11 is greater than the length of strip-shaped head 31, and the difference between the diameter of cooperation groove 11 and the length of strip-shaped head 31 can be less than or equal to 1mm, at this time, the gap between the side wall 111 of cooperation groove 11 and the first side surface 311 is less than or equal to 0.05mm. The length direction of strip-shaped head 31 can refer to the direction shown by the A arrow in Figure 1 The thickness direction of strip-shaped head 31 can refer to the direction shown by the E arrow in Figure 5 The thickness direction of strip-shaped head 31 is perpendicular to the length direction and width direction thereof, and the width direction of strip-shaped head 31 is parallel to the length direction of the whole fastener 3.

[0052] The stopper 14 is preferably fixed on the shell 13 and the end plate 12. The stopper 14 is used for contacting the second side surface 312 of strip-shaped head 31 during the rotation of tool body 1. The stopper 14 can include the stopper rib 141 used for contacting the partial area of the second side surface 312. The stopper 14 can also include the stopper plate used for contacting the whole second side surface 312.

[0053] In the embodiment, the side wall 111 of the matching groove 11 is in clearance fit with the first side surface 311 in the strip-shaped head 31, facilitating the strip-shaped head 31 to be put into the matching groove 11. In addition, through the arrangement of the stop portion 14, the strip-shaped head 31 can rotate with the rotation of the tool body 1 during the rotation of the tool body 1.

[0054] In an optional embodiment of the utility model, the stop portion 14 includes at least one stop rib 141 extending along the depth direction of the matching groove 11.

[0055] In the embodiment, through the arrangement of the stop rib 141, the strip-shaped head 31 can rotate with the rotation of the tool body 1 under the premise of realizing the rotation of the strip-shaped head 31 with the rotation of the tool body 1, thereby saving the material consumption and reducing the cost.

[0056] The number of the stop rib 141 can be one or at least two. When the number of the stop rib 141 is one, the stop rib 141 is located on one side of the strip-shaped head 31 along the thickness direction of the strip-shaped head 31 when the matching groove 11 is matched with the strip-shaped head 31. When the tool body 1 rotates, the stop rib 141 contacts one of the second side surfaces 312 of the strip-shaped head 31, and the tool body 1 drives the strip-shaped head 31 to rotate through the stop rib 141.

[0057] In an optional embodiment of the utility model, the number of the stop rib 141 is at least two, and the at least two stop ribs 141 are arranged at intervals along the circumference of the shell 13. The interval distance between any two adjacent stop ribs 141 is greater than the thickness of the strip-shaped head 31. When the matching groove 11 is matched with the strip-shaped head 31, the at least two stop ribs 141 are respectively located on both sides of the strip-shaped head 31 along the thickness direction of the strip-shaped head 31.

[0058] The number of the stop rib 141 is preferably two, and the two stop ribs 141 are preferably symmetrically arranged. The interval distance between any two stop ribs 141 is greater than the thickness of the strip-shaped head 31, so that the strip-shaped head 31 can be placed between the two stop ribs 141. When the number of the stop rib 141 is two and the two stop ribs 141 are symmetrically arranged, the interval distance between the two stop ribs 141 is the distance between the two stop ribs 141 along the diameter direction of the matching groove 11.

[0059] In an optional embodiment of the utility model, at least one hollow hole 121 is arranged on the end plate 12. The hollow hole 121 penetrates the end plate 12 along the thickness direction of the end plate 12, and the hollow hole 121 is in communication with the matching groove 11.

[0060] The number of the hollow holes 121 can be set according to actual needs, for example, can be set to 1-8. The number of the hollow holes 121 is preferably 6. The shape of the hollow holes 121 can be circular, square, oval, polygonal, etc. When the number of the hollow holes 121 is multiple and the cross-sectional shape of the end plate 12 is circular, the hollow holes 121 are preferably spaced and uniformly distributed around the circumference of the end plate 12. The thickness direction of the end plate 12 is parallel to the length direction of the tool body 1. In this embodiment, through the setting of the hollow holes 121, the rotation of the fastener 3 can be observed when the fastener 3 is disassembled and assembled. In addition, through the setting of the hollow holes 121, the weight of the disassembly and assembly tool can also be reduced.

[0061] In an optional embodiment of the present application, the depth of the matching groove 11 is greater than or equal to the width of the strip-shaped head 31, so as to ensure that the entire strip-shaped head 31 can be inserted into the matching groove 11, which can effectively avoid the disassembly and assembly tool from being separated from the fastener 3 during the rotation of the disassembly and assembly tool.

[0062] In an optional embodiment of the present application, the length direction of the stress receiving portion 2 is parallel to the depth direction of the matching groove 11, and the cross-sectional shape of the stress receiving portion 2 is circular.

[0063] The stress receiving portion 2 is a solid structure or a hollow structure. When the stress receiving portion 2 is a solid structure, the stress receiving portion 2 can be a cylinder. When the stress receiving portion 2 is a hollow structure, the stress receiving portion 2 can be a circular tube. In this embodiment, the tool head includes a clamping component for clamping the outer surface of the stress receiving portion 2. In this embodiment, the cross-sectional shape of the stress receiving portion 2 is circular, the stress receiving portion 2 is simple in structure, and is conducive to clamping by the clamping component.

[0064] In other embodiments, the stress receiving portion 2 is a solid structure or a hollow structure, and the cross-sectional shape of the stress receiving portion 2 is square, hexagonal, cross-shaped, or one-shaped, etc. The tool head includes a matching hole for matching with the outer surface of the stress receiving portion 2.

[0065] In a second aspect, the embodiments of the present application provide a disassembly and assembly device. The disassembly and assembly device includes an electric rotating tool and the disassembly and assembly tool provided in the first aspect. The disassembly and assembly tool includes a tool body 1 and a stress receiving portion 2. The tool body 1 has a matching groove 11 for matching with a strip-shaped head 31 in a fastener 3. The stress receiving portion 2 is connected with the tool body 1. The electric rotating tool includes a tool head. The stress receiving portion 2 matches with the tool head in the electric rotating tool. The matching groove 11 matches with the strip-shaped head 31. When the stress receiving portion 2 rotates, the tool body 1 rotates with the stress receiving portion 2. The tool body 1 drives the strip-shaped head 31 to rotate. The tool head preferably includes a clamping component for clamping the stress receiving portion 2.

[0066] The disassembling device has the advantages of the disassembling aid tool, and thus will not be described herein.

[0067] It is to be noted that the relative terms, such as first and second, and the like, are used herein only to distinguish one entity or action from another, and do not necessarily require or imply any such actual relationship or order between such entities or actions. Moreover, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements recited, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0068] It is to be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. When an element is referred to as being "disposed" on another element, it can be directly on the other element or intervening elements can also be present. As used herein, the terms "vertical", "horizontal", "left", "right", and similar expressions are used for illustrative purposes only.

[0069] Each of the embodiments in the specification is described in a relevant manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant part can be referred to the part of the method embodiment.

[0070] The above is only a preferred embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application is included in the protection scope of the present application.

[0071] The dismounting auxiliary tool and the dismounting device are described in detail above, the principle and the implementation mode of the present application are described by applying specific examples in the text, the description of the above examples is only used for helping to understand the structure of the present application and its core idea; meanwhile, for the general technical personnel in the field, according to the idea of the present application, there will be changes in the specific implementation mode and the application range, and the above, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A disassembly assisting tool characterized by comprising: The tool body has a fitting groove for fitting with a bar-shaped head in a fastener; The force receiving part is connected with the tool body and is used for fitting with a tool head in an electric rotary tool; The fitting groove fits with the bar-shaped head, and when the force receiving part rotates, the tool body rotates with the force receiving part, and the tool body drives the bar-shaped head to rotate. The fitting groove fits with the bar-shaped head, and when the force receiving part rotates, the tool body rotates with the force receiving part, and the tool body drives the bar-shaped head to rotate.

2. The dismounting aid according to claim 1, characterized in that The tool body has a rotation axis, and when the fitting groove fits with the bar-shaped head, the center point of the bar-shaped head and the center point of the force receiving part are located on the rotation axis.

3. The dismounting aid according to claim 1, characterized in that The tool body includes an end plate located on a side of the fitting groove away from a slot opening of the fitting groove, and the force receiving part is connected with the end plate.

4. The dismounting aid according to claim 3, characterized in that The tool body includes a shell connected with the end plate, and the shell and the end plate enclose the fitting groove, and the cross-sectional shape of the fitting groove and the shell is circular; The bar-shaped head has two first side surfaces oppositely arranged along the length direction of the bar-shaped head and two second side surfaces oppositely arranged along the thickness direction of the bar-shaped head, and the side wall of the fitting groove is used for gap fitting with the first side surface in the bar-shaped head; The tool body includes a stop part arranged on the shell and / or the end plate, the fitting groove fits with the bar-shaped head, and when the tool body rotates, the stop part contacts the second side surface in the bar-shaped head, and the tool body drives the bar-shaped head to rotate through the stop part.

5. The dismounting aid according to claim 4, characterized in that The stop part includes at least one stop rib extending along the depth direction of the fitting groove.

6. The dismounting aid according to claim 5, characterized in that The number of the stop ribs is at least two; At least two stop ribs are arranged in a circumferential direction of the shell, and the interval distance of any two adjacent stop ribs is greater than the thickness of the bar-shaped head; When the fitting groove fits with the bar-shaped head, at least two stop ribs are respectively located on both sides of the bar-shaped head along the thickness direction of the bar-shaped head.

7. The dismounting aid according to claim 3, characterized in that At least one hollow hole is arranged on the end plate; The hollow hole penetrates the end plate along the thickness direction of the end plate, and the hollow hole is connected with the fitting groove.

8. The dismounting aid according to any one of claims 1 to 7, characterized in that The depth of the fitting groove is greater than or equal to the width of the bar-shaped head.

9. The dismounting aid according to any one of claims 1 to 7, characterized in that The length direction of the force receiving part is parallel to the depth direction of the fitting groove, and the cross-sectional shape of the force receiving part is circular.

10. A dismounting device, characterized in that The electric rotary tool and the dismounting auxiliary tool according to any one of claims 1 to 9 are included.

Images