Guide tool and screwing device

Abstract

The utility model relates to the technical field of threaded fastener assembly, and provides a guide tool and a screwing device. The guide tool is used for being matched with a screwing tool to carry out screwing operation on a threaded fastener and comprises a base body, a plurality of clamping parts and elastic driving parts arranged between the clamping parts and the base body. Under driving of the elastic driving parts, the multiple clamping parts can define a guiding cavity, the threaded fastener can enter the guiding cavity, and screwing operation is conducted through the screwing tool under clamping guiding of the multiple clamping parts. According to the guiding tool, the guiding effect of the threaded fastener in the screwing operation process can be improved, the problem of poor screwing of the threaded fastener is avoided, the installation qualification rate of the threaded fastener can be improved, and therefore the production takt of an automatic production line can be improved.

Description

Technical Field

[0001] This utility model relates to the field of threaded fastener assembly technology, and in particular to a guide fixture. This utility model also relates to a tightening device equipped with the guide fixture. Background Technology

[0002] Currently, the production process of automated assembly lines for wire-controlled chassis, especially the bolt tightening process, typically requires high first-pass yield, minimal personnel input, and guaranteed quality. However, existing bolt tightening mechanisms (such as electric tightening guns) cannot guarantee proper alignment when tightening bolts, screws, and other threaded fasteners. This is especially true for long bolts around 30mm in length. Due to the bolt's length, the tightening shaft (such as the tightening gun head of an electric tightening gun) tends to spin freely on the surface of the threaded fastener during the capping stage (meaning the tightening shaft and the head of the threaded fastener cannot be properly aligned and connected), resulting in unqualified tightening of the threaded fastener.

[0003] Of course, to facilitate successful mating of the tightening shaft with threaded fasteners, existing technologies typically use specific process parameters to increase the number of rotations of the tightening shaft and reduce its speed. While this reduces the frequency of unqualified tightening, isolated instances of unqualified tightening still occur. Furthermore, it extends the cycle time of automated production lines and necessitates rework. Therefore, existing bolt tightening mechanisms suffer from poor alignment and a low rate of qualified threaded fastener installation, hindering the improvement of automated production cycle time. Utility Model Content

[0004] In view of this, the present invention aims to provide a guiding tooling that helps to improve the installation qualification rate of threaded fasteners.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A guide fixture for cooperating with a screwing fixture to perform screwing operations on threaded fasteners, comprising a base, a plurality of clamping portions distributed sequentially along the circumference of the base, and elastic driving portions respectively disposed between each of the clamping portions and the base.

[0007] Driven by each of the elastic driving parts, the plurality of clamping parts can surround and form a guide cavity arranged along the axial direction of the screwing fixture, and the threaded fastener can enter the guide cavity and be screwed by the screwing fixture under the clamping and guidance of the plurality of clamping parts.

[0008] Furthermore, the guide cavity includes a first guide section, a centering section, and a second guide section distributed sequentially along the axial direction; the first guide section is used to guide the threaded fastener to move towards the centering section, the centering section is used to center the screwing shaft of the screwing tool and the threaded fastener, and the second guide section guides the threaded fastener when the screwing shaft is screwed.

[0009] Furthermore, the guide cavity includes a first transition section located between the first guide section and the centering section, the first transition section being used to guide the threaded fastener into the centering section; and / or, the guide cavity includes a second transition section located between the centering section and the second guide section, the second transition section being used to guide the threaded fastener into the second guide section and to open each of the clamping portions.

[0010] Furthermore, the threaded fastener has a head that receives the turning force of the turning shaft; the length L1 of the second guide segment along the axial direction and the length L2 of the head along the axial direction satisfy the following relationship: L1:L2=(3-4):1, and / or, the diameter D1 of the second guide segment and the diameter D2 of the head satisfy the following relationship: D2:D1=(1.1-1.5):1.

[0011] Furthermore, the length L3 of the center section along the axial direction is not less than the length L2 of the head; and / or, the diameter D3 of the screwing shaft is not greater than the diameter D1 of the second guide section.

[0012] Furthermore, the base includes a first base and a second base disposed on the first base; the first base is provided with a guide hole for guiding the screwing shaft of the screwing tool into the guide cavity; each of the clamping parts and each of the elastic driving parts are disposed on the second base.

[0013] Furthermore, the second base is provided with a feeding channel communicating with the guide cavity. The feeding channel is connected to the feeding device of the threaded fastener and is used to allow the threaded fastener to enter the guide cavity.

[0014] Furthermore, the second base is provided with a detachable adapter, the feeding pipe of the feeding device is connected to the second base through the adapter, and the adapter is provided with a connecting channel that connects the feeding pipe to the feeding channel.

[0015] Furthermore, the second base is provided with a plurality of rotating grooves, and the plurality of clamping parts are provided in a one-to-one correspondence with each of the rotating grooves, and each of the clamping parts is rotatably disposed in the corresponding rotating groove; and / or, the first base and the second base are detachably connected.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] The guide fixture described in this utility model, through the combined use of multiple clamping parts and multiple elastic driving parts, can form a guide cavity for the threaded fastener to be buffered, and can also allow the threaded fastener to be tightened by the tightening fixture under the clamping and guidance of multiple clamping parts. This can improve the guiding effect of the threaded fastener during the tightening operation, avoid the threaded fastener from being skewed or poorly tightened, and thus improve the installation qualification rate of the threaded fastener, thereby helping to improve the production efficiency of automated production lines.

[0018] Furthermore, by setting up the first guide section, the threaded fastener can easily enter the centering section. The centering section also facilitates the alignment of the tightening shaft and the threaded fastener, forming a transmission connection between them. This makes it easier for the tightening shaft to subsequently tighten the threaded fastener. Simultaneously, by setting up the second guide section, the threaded fastener can be tightened by the tightening shaft under the clamping and guidance of multiple clamping parts, thereby improving the guiding effect and installation quality of the threaded fastener. The first transition section facilitates the threaded fastener's entry into the centering section from the first guide section. The second transition section facilitates the threaded fastener opening multiple clamping parts, entering the second guide section, and being tightened by the tightening shaft under the clamping and guidance of these parts.

[0019] Furthermore, the length L1 of the second guide section along the axial direction and the length L2 of the head along the axial direction satisfy the following relationship: L1:L2=(3-4):1. This ensures sufficient time or length for clamping and guiding the threaded fastener, preventing it from skewing before being screwed into the fastened component, thus improving the installation qualification rate of the threaded fastener. The diameter D1 of the second guide section and the diameter D2 of the head satisfy the following relationship: D2:D1=(1.1-1.5):1. This prevents the head diameter D2 from being too small or too large relative to the diameter D1 of the second guide section, which could lead to multiple clamping parts being unable to stably clamp the threaded fastener, thus ensuring the clamping and guiding effect of the threaded fastener during the tightening operation.

[0020] Furthermore, ensuring that the length L3 of the centering section along the axial direction is not less than the length L2 of the head prevents the threaded fastener located in the centering section from wobbling, thus ensuring the accuracy of the alignment and transmission connection between the tightening shaft and the head of the threaded fastener. Ensuring that the diameter D3 of the tightening shaft is not greater than the diameter D1 of the second guide section prevents the diameter D3 from being too large and affecting the clamping effect of the multiple clamping parts on the threaded fastener. A guide hole is provided on the first base to facilitate the entry of the tightening shaft into the guide cavity and its alignment and transmission connection with the threaded fastener.

[0021] Furthermore, by providing a feeding channel on the second base that communicates with the guide cavity and is connected to the feeding device, automatic feeding of threaded fasteners can be achieved. The adapter facilitates convenient assembly and disassembly of the feeding tube. The multiple rotating slots improve the rotational reliability of each clamping part, ensuring effective clamping and guiding of the threaded fasteners. The detachable connection between the first and second bases enhances the ease of maintenance of this guiding fixture.

[0022] Another objective of this invention is to provide a screwing device for screwing threaded fasteners, comprising a screwing fixture for outputting screwing force, and a guide fixture as described above that is configured in conjunction with the screwing fixture.

[0023] The screwing device described in this utility model is equipped with the aforementioned guide fixture, which can improve the installation qualification rate of threaded fasteners, thereby improving the working efficiency and quality of subsequent screwing devices, and thus helping to improve the production cycle of automated production lines. Attached Figure Description

[0024] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of the guide tooling described in an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the guide tooling described in an embodiment of the present utility model;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic diagram of the feeding channel described in an embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the guide tooling used in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the threaded fastener described in an embodiment of the present utility model;

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Guide cavity; 101. First guide section; 102. Centering section; 103. Second guide section; 104. First transition section; 105. Second transition section;

[0033] 11. First substrate; 110. Guide hole; 111. First connecting hole;

[0034] 12. Second base; 120. Feeding channel; 121. Adapter; 122. Rotating groove; 123. Mounting groove; 124. Second connecting hole; 125. Guide mating hole;

[0035] 13. Clamping part; 131. Positioning pin; 14. Elastic drive part;

[0036] 20. Threaded fastener; 201. Head; 202. Threaded shank;

[0037] 30. Feed pipe; 40. Parts to be fastened; 50. Tightening shaft. Detailed Implementation

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0039] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0040] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0042] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] Example 1

[0044] This embodiment relates to a guide fixture, which is particularly suitable for use with a screwing fixture equipped with an electric tightening gun to improve the installation qualification rate of threaded fasteners 20 and solve the problem that threaded fasteners 20 such as bolts and screws are prone to poor tightening in the production process of automated assembly lines in traditional technology, which affects the improvement of the production line cycle time.

[0045] In terms of overall structure, such as Figures 1 to 6 As shown, the guide fixture of this embodiment is used to perform the screwing operation of the threaded fastener 20 in conjunction with the screwing fixture. It includes a base, a plurality of clamping parts 13 distributed sequentially along the circumference of the base, and elastic driving parts 14 respectively provided between each clamping part 13 and the base.

[0046] Furthermore, under the drive of each elastic drive unit 14, multiple clamping units 13 can surround and form a guide cavity 10 arranged along the axial direction of the screwing fixture, and the threaded fastener 20 can enter the guide cavity 10 and be screwed by the screwing fixture under the clamping guidance of the multiple clamping units 13.

[0047] At this time, with the above configuration, the guide cavity 10 can be formed by the cooperation of multiple clamping parts 13 and multiple elastic driving parts 14 to buffer the threaded fastener 20. The threaded fastener 20 can also be tightened by the tightening tool under the clamping and guiding of multiple clamping parts 13, which can improve the guiding effect of the threaded fastener 20 during the tightening operation, avoid the threaded fastener 20 from being skewed or not tightened properly, and thus improve the installation qualification rate of the threaded fastener 20, which can help improve the production efficiency of the automated production line.

[0048] Based on the above description, in detail, in this embodiment, the guide fixture is particularly suitable for use with a screw-tightening fixture equipped with an electric tightening gun. This ensures that the screw-tightening fixture can efficiently and effectively complete the assembly of threaded fasteners 20 such as bolts and screws without manual operation, thereby improving the installation qualification rate of the threaded fasteners 20. It is also more suitable for installing bolts or screws with longer lengths, such as using bolts with a length of about 30mm to install ECUs (specifically, the installation location mainly refers to the ECU housing) in an automated assembly line for a wire-controlled chassis. This guide fixture helps to avoid problems such as bolt misalignment and poor tightening, thus further improving production line efficiency.

[0049] Meanwhile, the screwing fixture in this embodiment mainly includes a frame and an electric screwing gun mounted on the frame. The axial direction is the screwing shaft or screwing gun head of the electric screwing gun. In specific implementation, the frame and the base of the guide fixture can be simultaneously set at the drive end of the robot or drive mechanism so that they can be driven by the robot or drive mechanism. This helps to improve the automation level of the screwing operation of the threaded fastener 20.

[0050] It should be noted that the direction-related descriptions in this embodiment are merely illustrative examples. In actual implementation, the direction descriptions in this embodiment vary depending on the axial direction of the screwing shaft 50 in the screwing fixture. That is, each direction in this embodiment refers to a relative coordinate system based on the axial direction of the screwing shaft 50.

[0051] In this embodiment, as a preferred implementation, see [reference needed]. Figure 2 and Figure 3 As shown, the guide cavity 10 includes a first guide section 101, a centering section 102, and a second guide section 103 distributed sequentially along the axial direction. The first guide section 101 guides the threaded fastener 20 to move towards the centering section 102, the centering section 102 is used for centering the screwing shaft 50 of the screwing fixture and the threaded fastener 20, and the second guide section 103 guides the threaded fastener 20 when the screwing shaft 50 is screwed.

[0052] Here, by setting the first guide section 101, the threaded fastener 20 can enter the centering section 102. By setting the centering section 102, the turning shaft 50 and the threaded fastener 20 can be aligned to form a transmission connection between them, which facilitates the subsequent turning of the turning shaft 50 to turn the threaded fastener 20. At the same time, by setting the second guide section 103, the threaded fastener 20 can be turned by the turning shaft 50 under the clamping and guiding of multiple clamping parts 13, thereby improving the guiding effect and installation quality of the threaded fastener 20.

[0053] It is understood that in this embodiment, the first guide section 101 guides the threaded fastener 20 in a state where multiple clamping parts 13 are enclosed. That is, when the threaded fastener 20 enters the guide cavity 10, it first enters the first guide section 101, and then enters the centering section 102 under the guidance of the first guide section 101. After that, it is aligned with the screwing shaft 50 and connected to the drive. When the screwing operation is performed, the threaded fastener 20 will open up each clamping part 13 under the trend of the screwing shaft 50 and enter the second guide section 103. Finally, under the clamping guidance of multiple clamping parts 13, it is screwed into the component 40 to be fastened (e.g., ECU, i.e., electronic control unit). That is, the second guide section 103 guides the threaded fastener 20 mainly in a state where multiple clamping parts 13 are opened and the threaded fastener 20 is continuously clamped. The advantage of this setting is that it can keep the threaded fastener 20 from deviating from the screwing axis (i.e., the screwing axis will not be skewed), which is conducive to ensuring the installation qualification rate of the threaded fastener 20.

[0054] Furthermore, the reason why the middle section 102 is beneficial for the alignment between the tightening shaft 50 of the tightening fixture and the threaded fastener 20 is mainly because it can keep the threaded fastener 20 coaxial with the axis direction when the multiple clamping parts 13 are not spread open. This facilitates the alignment and transmission connection between the tightening shaft 50 and the head 201 of the threaded fastener 20. Of course, the alignment operation between the tightening shaft 50 and the head 201 of the threaded fastener 20 can be referred to as the alignment operation of the threaded fastener 20 such as bolts or screws to be installed using the conventional technology. The transmission connection after alignment means that the tightening shaft 50 can drive the threaded fastener 20 to rotate and screw the threaded fastener 20 into the part 40 to be fastened.

[0055] In specific implementation, this embodiment, as a preferred implementation, still refers to... Figure 3 As shown, the guide cavity 10 includes a first transition section 104 located between the first guide section 101 and the centering section 102. The first transition section 104 is used to guide the threaded fastener 20 into the centering section 102 so as to facilitate the threaded fastener 20 from the first guide section 101 into the centering section 102.

[0056] Meanwhile, in this embodiment, as a preferred implementation, the guide cavity 10 includes a second transition section 105 located between the centering section 102 and the second guide section 103. The second transition section 105 guides the threaded fastener 20 into the second guide section 103 and opens up each clamping part 13. In this way, the threaded fastener 20 can open up the multiple clamping parts 13, enter the second guide section 103, and be screwed by the screwing shaft 50 under the clamping guidance of the multiple clamping parts 13.

[0057] It is understood that in this embodiment, the diameter of the centering section 102 should be smaller than the diameter of the first guide section 101 to facilitate the movement of the threaded fastener 20 in the guide cavity 10. The diameter of the centering section 102 should be larger than the diameter D1 of the second guide section 103 to ensure that the head 201 of the threaded fastener 20 can be temporarily stored in the centering section 102, and to facilitate the alignment of the screw shaft 50 and the head 201 of the threaded fastener 20.

[0058] Furthermore, in this embodiment, as a preferred implementation, combined with Figure 3 and Figure 6 As shown, the threaded fastener 20 has a head 201 that receives the tightening force of the tightening shaft 50. The length L1 of the second guide section 103 along the axial direction and the length L2 of the head 201 along the axial direction satisfy the following relationship: L1:L2=(3-4):1. Also, as a preferred embodiment, as shown in the figure, the diameter D1 of the second guide section 103 and the diameter D2 of the head 201 satisfy the following relationship: D2:D1=(1.1-1.5):1.

[0059] The length L1 of the second guide section 103 along the axial direction and the length L2 of the head 201 along the axial direction are such that L1:L2 = (3-4):1. This ensures sufficient time or length for clamping and guiding the threaded fastener 20, preventing it from skewing before being screwed into the fastened component, thus improving the installation success rate of the threaded fastener 20. Furthermore, the diameter D1 of the second guide section 103 and the diameter D2 of the head 201 are such that D2:D1 = (1.1-1.5):1. This prevents the diameter D2 of the head 201 from being too small or too large relative to the diameter D1 of the second guide section 103, which could cause the multiple clamping parts 13 to be unable to stably clamp the threaded fastener 20, thus ensuring the clamping and guiding effect of the threaded fastener 20 during the tightening operation.

[0060] In specific implementation, the length L1 of the second guide section 103 along the axial direction and the length L2 of the head 201 along the axial direction can satisfy the following ratio: L1:L2 = 3:1, 3.5:1 or 4:1; similarly, the diameter D1 of the second guide section 103 and the diameter D2 of the head 201 can satisfy the following ratio: D2:D1 = 1.1:1, 1.3:1 or 1.5:1, in order to achieve a better clamping and guiding effect on the threaded fastener 20 during the tightening operation.

[0061] Furthermore, in this embodiment, as a preferred implementation, the length L3 of the middle section 102 along the axial direction is not less than the length L2 of the head 201, so as to avoid the threaded fastener 20 located in the middle section 102 from shaking, and to ensure the alignment and transmission connection accuracy of the screwing shaft 50 and the head 201 of the threaded fastener 20.

[0062] Similarly, as a preferred embodiment, the diameter D3 of the screwing shaft 50 is not greater than the diameter D1 of the second guide section 103, so as to avoid the screwing shaft 50 diameter D3 being too large and affecting the clamping effect of the multiple clamping parts 13 on the threaded fastener 20.

[0063] In addition, in this embodiment, as a preferred implementation, see [reference needed]. Figure 1 and Figure 3 As shown, the base includes a first base 11 and a second base 12 disposed on the first base 11. The first base 11 is provided with a guide hole 110, which is used to guide the screwing shaft 50 of the screwing fixture into the guide cavity 10. Meanwhile, each clamping part 13 and each elastic driving part 14 are disposed on the second base 12.

[0064] The main advantage of this arrangement is that the guide hole 110 allows the screw shaft 50 to enter the guide cavity 10 and be aligned and connected with the threaded fastener 20. Furthermore, each clamping part 13 and each elastic driving part 14 are located on the second base 12, resulting in a reasonable structural arrangement that facilitates the assembly and subsequent maintenance of the guide fixture.

[0065] To enhance the guiding effect of the screwing shaft 50 and the alignment effect between the screwing shaft 50 and the threaded fastener 20, in this embodiment, the second base 12 is preferably provided with a guide mating hole 125 arranged coaxially with the guide hole 110, and the guide mating hole 125 is connected to the guide cavity 10.

[0066] In specific implementation, as a preferred embodiment in this example, see [link to example]. Figure 4 As shown, the second base 12 is provided with a feeding channel 120 that communicates with the guide cavity 10. The feeding channel 120 is connected to the feeding device of the threaded fastener 20 and is used to allow the threaded fastener 20 to enter the guide cavity 10. This facilitates the automatic feeding of the threaded fastener 20.

[0067] Furthermore, in this embodiment, as a preferred implementation, combined with Figure 4 and Figure 5 As shown, the second base 12 is provided with a detachable adapter 121. The feeding pipe 30 of the feeding device is connected to the second base 12 through the adapter 121, and the adapter 121 is provided with a connecting channel that connects the feeding pipe 30 to the feeding channel 120. By providing the adapter 121, the feeding pipe 30 can be easily disassembled and assembled.

[0068] It is worth mentioning that the feeding device and adapter 121 in this embodiment can be related equipment products well known to those skilled in the art. For example, the feeding device can be an automatic nail feeder, the adapter 121 can be snapped or screwed onto the second base 12, and the feeding tube 30 can be directly fitted onto the end of the adapter 121 away from the second base 12. The threaded fastener 20 in this embodiment can be a bolt or screw well known to those skilled in the art, especially a long bolt or screw. In the specific structure, in addition to the head 201, it also includes a threaded shank 202 connected to the head 201.

[0069] In addition, in this embodiment, as a preferred implementation, see [reference needed]. Figure 2 As shown, the second base 12 is provided with a plurality of rotating grooves 122, and a plurality of clamping parts 13 are provided in a one-to-one correspondence with each rotating groove 122, and each clamping part 13 is rotatably disposed in its corresponding rotating groove 122. By providing a plurality of rotating grooves 122, the rotational reliability of each clamping part 13 can be improved, ensuring the clamping and guiding effect on the threaded fastener 20.

[0070] Of course, in specific implementation, the number and arrangement of the clamping parts 13 in this embodiment can be set and adjusted according to the actual guiding requirements of the guide tooling. For example, there may be two or three clamping parts 13 distributed sequentially along the circumference of the second base 12. When there are two clamping parts 13, the two clamping parts 13 are also arranged radially opposite to each other along the screwing shaft 50. At this time, it should be noted that the rotating groove 122 and the elastic drive part 14 are both set to correspond to the clamping parts 13.

[0071] Secondly, the specific structure of the clamping part 13 in this embodiment can refer to the clamping flaps well known to those skilled in the art, and can be rotatably disposed in the rotating groove 122 by means of the positioning pin 131. The elastic driving part 14 can be a spring well known to those skilled in the art. In order to ensure the stability of each elastic driving part 14 in use, mounting grooves 123 corresponding to each elastic driving part 14 can also be provided on the second base 12. Each mounting groove 123 can be located in the corresponding rotating groove 122, and one end of each elastic driving part 14 is connected to the bottom of the corresponding mounting groove 123, and the other end is connected to the corresponding clamping part 13.

[0072] In this embodiment, as a preferred implementation, see [reference needed]. Figure 2 As shown, the first base 11 and the second base 12 are detachably connected, which improves the ease of maintenance of the guide fixture. Of course, the first base 11 and the second base 12 can be specifically connected by bolts. For example, the first base 11 has a first connecting hole 111, and the second base 12 has a second connecting hole 124, with bolts sequentially screwed into the first connecting hole 111 and the second connecting hole 124.

[0073] The guide fixture in this embodiment can improve the guiding effect of the threaded fastener 20 during the tightening operation, avoid the threaded fastener 20 from being skewed or not tightened properly, thereby improving the installation qualification rate of the threaded fastener 20, which can help improve the production efficiency of automated production lines.

[0074] Example 2

[0075] This embodiment relates to a tightening device for tightening threaded fasteners 20. It includes a tightening fixture for outputting tightening force and a guide fixture as described in Embodiment 1, which works in conjunction with the tightening fixture. As mentioned in Embodiment 1, the tightening fixture preferably includes a frame and an electric tightening gun mounted on the frame, with the axial direction being the tightening shaft or the axial direction of the tightening gun head. The tightening device preferably includes a robotic arm or drive mechanism for driving the tightening fixture and the guide fixture, which will not be elaborated further here.

[0076] The screwing device in this embodiment, by configuring the guide fixture in Embodiment 1, can improve the installation qualification rate of the threaded fasteners 20, reduce the occurrence of poor tightening and rework, and thus improve the working yield and efficiency of the screwing device. This can help improve the first-pass qualification rate of products in the automated assembly line, which is also beneficial to improving the production cycle of the automated assembly line.

[0077] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A guide tool for cooperating with a screwing tool to perform a screwing operation on a threaded fastener (20), characterized in that: it comprises a base body, a plurality of clamping portions (13) arranged along a circumferential direction of the base body, and an elastic driving portion (14) arranged between each clamping portion (13) and the base body, respectively; under the driving of each elastic driving portion (14), the plurality of clamping portions (13) can enclose a guide cavity (10) arranged along an axial direction of the screwing tool, and the threaded fastener (20) can enter the guide cavity (10) and be screwed by the screwing tool under the clamping and guiding of the plurality of clamping portions (13). 2.The guide tool according to claim 1, characterized in that: the guide cavity (10) comprises a first guide section (101), a centering section (102) and a second guide section (103) arranged along the axial direction, in order; the first guide section (101) is used to guide the threaded fastener (20) to move to the centering section (102), the centering section (102) is used to center the threaded fastener (20) and a screwing shaft (50) of the screwing tool, and the second guide section (103) is used to guide the threaded fastener (20) when the screwing shaft (50) is screwed. 3.The guide tool according to claim 2, characterized in that: the guide cavity (10) comprises a first transition section (104) between the first guide section (101) and the centering section (102), which is used to guide the threaded fastener (20) to enter the centering section (102); and / or, the guide cavity (10) comprises a second transition section (105) between the centering section (102) and the second guide section (103), which is used to guide the threaded fastener (20) to enter the second guide section (103) and to separate the clamping portions (13). 4.The guide tool according to claim 2, characterized in that: the threaded fastener (20) has a head (201) which receives a screwing force of the screwing shaft (50); a length L1 of the second guide section (103) along the axial direction and a length L2 of the head (201) along the axial direction satisfy L1: L2 = (3-4): 1, and / or a diameter D1 of the second guide section (103) and a diameter D2 of the head (201) satisfy D2: D1 = (1.1-1.5):

1. 5.The guide tool according to claim 4, characterized in that: a length L3 of the centering section (102) along the axial direction is not less than the length L2 of the head (201); and / or, a diameter D3 of the screwing shaft (50) is not greater than the diameter D1 of the second guide section (103). 6.The guide tool according to any one of claims 1 to 5, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The base comprises a first base (11) and a second base (12) arranged on the first base (11); The first base (11) is provided with a guide hole (110) for guiding a screwing shaft (50) of the screwing tool to enter the guide cavity (10); Each of the clamping portions (13) and the elastic driving portions (14) is arranged on the second base (12).

7. The guide tool according to claim 6, characterized in that: The second base (12) is provided with a feeding channel (120) in communication with the guide cavity (10), the feeding channel (120) is connected with a feeding device of the threaded fastener (20), and is used for feeding the threaded fastener (20) into the guide cavity (10).

8. The guide tool according to claim 7, characterized in that: The second base (12) is provided with a detachable adapter (121), a feeding pipe (30) of the feeding device is connected with the second base (12) through the adapter (121), and the adapter (121) is provided with a communication channel for communicating the feeding pipe (30) with the feeding channel (120).

9. The guide tool according to claim 6, characterized in that: The second base (12) is provided with a plurality of rotating grooves (122), a plurality of the clamping portions (13) are arranged in one-to-one correspondence with the rotating grooves (122), and each of the clamping portions (13) is rotatably arranged in the corresponding rotating groove (122); and / or, The first base (11) and the second base (12) are detachably connected.

10. A screwing device for performing a screwing operation on a threaded fastener (20), characterized by: comprising a screwing tool for outputting a screwing force, and the guide tool according to any one of claims 1 to 9 arranged in cooperation with the screwing tool.

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