A disassembly and assembly device for disassembling and assembling a threaded joint in a limited space

Abstract

The present invention relates to the technical field of disassembly tools, and in particular to a disassembly and assembly device for disassembling and assembling a threaded joint in a limited space, comprising a fixed connection component for connecting a threaded joint installation tool; a base, the fixed connection component is detachably adjusted and fixed on the base; and a wrench, driving the base to rotate; the present invention improves the installation accuracy of the threaded joint, ensures that the threaded joint can be screwed in perpendicular to the surface of a workpiece, does not appear to be skewed in installation, reduces or even eliminates the scrap rate; improves the installation efficiency of the threaded joint, greatly reduces unnecessary detection time, shortens the installation frequency, and reduces the installation time of the threaded joint in each limited space by 80%; reduces the dependence on the operator's skill level, makes this work as standardized and unified as possible, reduces the installation difficulty from the operation level, and enables general operators to perform operation and installation after simple training and practice, and the installation meets the process requirements.

Description

Technical Field

[0001] The invention relates to the technical field of disassembly tools, and in particular to a disassembly device for disassembling and assembling a threaded joint in a limited space. Background Art

[0002] Threaded joints are a type of connector widely used in the industrial field, especially in the production of various parts and car bodies in the field of EMUs. There are many parts and components that need to be installed with threaded joints. The connection is convenient and fast, the operation is simple, and the disassembly and replacement are easy, which can greatly reduce the production cost. It is currently the most widely used basic connector in the production of aluminum alloy EMU bodies. Under normal circumstances, the installation of threaded joints requires the use of corresponding installation tools and installation picks. The most common installation method is to clamp and fix the installation tool with a pick, install the threaded joint on the stud at the front end of the installation tool, and then the operator rotates the pick with both hands to screw the threaded joint into the bottom hole. After adjusting the verticality, hold the connecting rods at both ends of the pick with both hands, and tighten evenly until the installation tool contacts the surface of the workpiece. However, the above method has a disadvantage, which is that it is necessary to give the pick a space to rotate.

[0003] There are currently four types of installation picks, with lengths of 300mm, 500mm, 1000mm, and 1300mm. For some special parts, there is simply not enough operating space. For example, in the vehicles used by Wuyishan Light Rail, an M8 threaded connector needs to be installed in the driver's cab at the front of the head car. The space available for the pick to rotate is only 180mm, and the pick cannot be fully rotated for installation. There is also a redesigned 350 standard head car. According to the change notification requirements, 6 M8 threaded connectors need to be installed on the newly added inner end wall of the head car. This threaded connector is located in a recessed part, with even less operating space, and cannot be installed with a pick. In the later modification process, the operating space is even less. In the face of this situation, the usual practice in the past was to use an adjustable wrench instead of an installation pick. Although this can be done in some small spaces, it is inconvenient to use, and the installation accuracy cannot be controlled. It requires a high level of skill from the operator and is inefficient.

[0004] Generally speaking, there are two situations for installing threaded joints in a limited space: First, the process technicians check the number and position of the threaded joints to be installed in advance, and install the threaded joints in advance when the parts at this position have not been welded. Second, in subsequent production, with the actual installation requirements, it is necessary to immediately install threaded joints at the required position. At this time, the staff needs to hold the adjustable wrench (the installation tool remains unchanged, but the adjustable wrench is used because the installation pick cannot be operated) to first screw the installation tool into the bottom hole, then hold the installation tool with one hand, and use the adjustable wrench with the other hand to repeatedly rotate the installation tool. During the installation process, it is necessary to use a square ruler to repeatedly check whether it is screwed in vertically. In the production of aluminum alloy car bodies for EMUs, the design process level is constantly improved and upgraded. After a period of production, the designers will need to add some connectors to certain parts according to the specific actual production needs. At this time, the aluminum alloy car bodies have been produced in batches, and it is impossible to go back to the machine tool to use the first method for processing. It can only be completed by manual processing by the staff, that is, the second installation method. During the installation process with an adjustable wrench, since the installation tool is subject to the rotational force of the adjustable wrench in one direction, the operator cannot ensure that the threaded joint is always screwed in vertically. The operator can only adjust the angle of the installation tool continuously according to the measurement result of the square ruler. During the whole process, the center axis of the threaded joint will deviate from the center axis of the bottom hole. The hardness of the threaded joint material itself is higher than that of the aluminum alloy material. This will cause the threaded joint to continuously expand the bottom hole, thereby reducing the installation strength. When the connector is installed later, the installation strength cannot be achieved, making this installation part scrapped. Moreover, this method requires a high level of skill from the operator. If you are not careful, the threaded joint will not be installed correctly or even cannot be completely screwed into the bottom hole (the process requires that the threaded joint should be 0.3-0.5mm lower than the installation surface), which will also cause this installation part to be scrapped. The installation of threaded joints belongs to a one-time molding processing method. When repairing, a large number of production equipment are required to cooperate, which prolongs the production time and reduces the production efficiency. It cannot meet the fast-paced production and cannot meet the high-precision installation standards.

[0005] Therefore, the disadvantages of the prior art include:

[0006] 1. Low installation accuracy: During the installation process, the installation tool is subjected to the torque of the adjustable wrench in one direction. The operator cannot accurately ensure that the installation tool is always perpendicular to the workpiece surface, causing the center axis of the installation tool to deviate from the center axis of the bottom hole, resulting in coaxiality deviation. The threaded joint is screwed into the bottom hole in an oblique direction, and in most cases, the installation accuracy requirements cannot be met;

[0007] 2. Difficult installation: Manual installation with an adjustable wrench requires a high level of operator skill. The operator cannot accurately ensure that the installation tool always maintains force balance on both sides during the entire installation process. During the screwing process, the threaded joint is subjected to intermittent feeding force, which cannot achieve the effect of uniform force feeding;

[0008] 3. Low production efficiency: To ensure that the threaded joint can be screwed in perpendicular to the surface of the workpiece, the operator will use a square ruler to measure the verticality many times during the installation process. At the same time, when using an adjustable wrench for installation, due to the limited installation space, the adjustable wrench can only make reciprocating swing movements. The smaller the space, the smaller the swing amplitude. This requires the operator to use the adjustable wrench to repeatedly install the threaded joint, making it impossible to complete the installation of the threaded joint in one go, which prolongs the working time.

[0009] 4. High scrap rate of installed finished products: Since the operator cannot accurately ensure that the installation tool is always perpendicular to the workpiece surface, the installation tool is subjected to a unidirectional rotational force during the installation process, causing the center axis of the installation tool to deviate from the center axis of the bottom hole, resulting in coaxiality deviation. The threaded joint is screwed into the bottom hole in an oblique direction, causing the threaded joint to be installed crookedly, or even unable to be completely screwed into the bottom hole, failing to meet the installation standards required by the process, and can only be scrapped and replaced;

[0010] 5. High installation cost: Due to the existence of the above four situations, operators will consume a lot of manpower and material resources when dealing with scrapped threaded joints. If the repair is troublesome, the delivery plan will be delayed, causing a sluggish production rhythm. Summary of the invention

[0011] The technical problem to be solved by the present invention is to provide a disassembly and assembly device for disassembling and assembling a threaded joint in a limited space, which overcomes the technical problems existing in the background technology.

[0012] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0013] A disassembly and assembly device for disassembling and assembling a threaded joint in a limited space, comprising:

[0014] A fixed connection assembly for connecting a threaded joint installation tool;

[0015] A base, the fixed connection assembly is detachably adjusted and fixed on the base; and

[0016] The wrench drives the base to rotate.

[0017] Further, the threaded joint installation tool includes a head and a handle;

[0018] The fixed connection assembly comprises a fixing portion for fixing the handle and a locking portion for fixing the head, and the fixing portion is arranged on one end of the base.

[0019] Furthermore, the fixing part includes a fixing block and a connecting piece, the fixing block is a regular quadrangular prism, a through hole is provided on the side of the fixing block, and the through hole is concentrically arranged with the tool handle; the fixing block can be rotatably fixed on the base through the connecting piece.

[0020] Furthermore, two mutually perpendicular through holes are arranged on the four fixed side surfaces, and the diameters of the two through holes are different.

[0021] Furthermore, the base is provided with a fixing groove for fixing the fixing block;

[0022] The surface of one end of the base connected to the fixing portion is located on the same horizontal plane as the side surface of the fixing block when it is fixed.

[0023] Furthermore, the locking portion includes a limit block, a locking member and an adjusting member, an adjusting slot is provided on the base, and the limit block is adjustably fixed to the adjusting slot through the adjusting member;

[0024] The limit block is provided with a through slot for the head of the installation tool to pass through, and the limit block fixes the head of the installation tool through a locking piece.

[0025] Furthermore, the base includes an adjustment plate and two L-shaped fixing plates arranged in mirror image, and the two L-shaped fixing plates are connected and fixed by the adjustment plate;

[0026] The adjusting groove is arranged on the adjusting plate.

[0027] Furthermore, the adjustment slot is an oblong hole slot;

[0028] The adjusting plate is fixed to the two L-shaped fixing plates by welding.

[0029] Furthermore, the base also includes a connecting head connected to the wrench, and the connecting head is arranged on the other end of the base opposite to the fixing part.

[0030] Furthermore, the wrench is a ratchet wrench.

[0031] The beneficial effects of the present invention are:

[0032] 1. Improve the installation accuracy of threaded joints. By using the fixing block as a regular quadrangular prism, ensure that the threaded joints can be screwed in perpendicular to the surface of the workpiece, without skewed installation, reduce or even eliminate the scrap rate, and allow the subsequent countersunk screws to be vertically inserted into the hole, making the appearance neat and the connection position compact.

[0033] 2. Improve the installation efficiency of threaded joints, significantly reduce unnecessary inspection time, shorten the installation frequency, and reduce the installation time of threaded joints in each limited space by 80%.

[0034] 3. Reduce the dependence on the operator's skill level, make this work as standardized and unified as possible, reduce the difficulty of installation from the operational level, so that general operators can perform operation and installation after simple training and practice, and ensure that the installation meets the process requirements.

[0035] 4. The overall structure of this device is firm and compact, and each connection part is tightly connected. It can be used repeatedly for a long time, and can match 90% of the threaded joint installation tools in production. It is easy to use, simple to operate, and has strong versatility. The installation parts can be replaced at any time to reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of a disassembly and assembly device for disassembling and assembling a threaded joint in a limited space and a threaded joint installation tool according to a specific embodiment of the present invention;

[0037] Figure 2 for Figure 1 Explosion and disassembly diagram;

[0038] Explanation of reference numerals: 1. Disassembly and assembly device for disassembling and assembling threaded joints in a limited space; 11. Fixed connection assembly; 111. Fixed portion; 1111. Fixed block; 1112. Connecting piece; 1113. Through hole; 112. Locking portion; 1121. Limit block; 1122. Locking piece; 1123. Adjusting piece; 1124. Through slot; 12. Base; 121. Adjusting slot; 122. Adjusting plate; 123. L-shaped fixing plate; 124. Connecting head; 13. Wrench; 2. Threaded joint installation tool; 21. Head; 22. Handle. DETAILED DESCRIPTION

[0039] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0040] Embodiment 1

[0041] A disassembly and assembly device 1 for disassembling and assembling a threaded joint in a limited space, comprising:

[0042] A fixed connection assembly 11, used for connecting the threaded joint installation tool 2;

[0043] A base 12, on which the fixed connection assembly 11 is detachably and adjustably fixed; and

[0044] The wrench 13 drives the base 12 to rotate.

[0045] The threaded joint installation tool 2 includes a head 21 and a handle 22, wherein the head 21 is generally a (regular) quadrangular prism, and the handle 22 is generally a cylinder;

[0046] The fixed connection assembly 11 includes a fixing portion 111 for fixing the handle 22 and a locking portion 112 for fixing the head 21 . The fixing portion 111 is disposed on one end of the base 12 .

[0047] The fixing portion 111 includes a fixing block 1111 and two connecting members 1112. The fixing block 1111 is a regular quadrangular prism. A through hole 1113 is provided on the side of the fixing block 1111. The through hole 1113 is concentrically arranged with the tool handle 22. The fixing block 1111 can be rotatably fixed on the base 12 through the connecting member 1112. The two connecting members 1112 are arranged on both ends of the fixing block 1111. The connecting member 1112 is a locking bolt.

[0048] Two mutually perpendicular through holes 1113 are arranged on the four fixed sides, and the diameters of the two through holes 1113 are different.

[0049] The base 12 is provided with a fixing groove for fixing the fixing block 1111;

[0050] The surface of one end of the base 12 connected to the fixing portion 111 is located on the same horizontal plane as the side surface of the fixing block 1111 when it is fixed.

[0051] The locking portion 112 includes a limit block 1121, a locking member 1122 and an adjusting member 1123. An adjusting slot 121 is provided on the base 12. The limit block 1121 is adjustably fixed to the adjusting slot 121 through the adjusting member 1123.

[0052] The limiting block 1121 is provided with a through slot 1124 for the installation tool head 21 to pass through, and the limiting block 1121 fixes the installation tool head 21 through a locking member 1122 .

[0053] The base 12 includes an adjustment plate 122 and two L-shaped fixing plates 123 that are arranged in a mirror image. The two L-shaped fixing plates 123 are connected and fixed through the adjustment plate 122; the two L-shaped fixing plates 123 form a fixing groove.

[0054] The adjustment slot 121 is formed on the adjustment plate 122 .

[0055] The adjustment slot 121 is an oblong hole slot;

[0056] The adjustment plate 122 is fixed to the two L-shaped fixing plates 123 by welding.

[0057] The base 12 further includes a connector 124 connected to the wrench 13 . The connector 124 is disposed on the other end of the base 12 opposite to the fixing portion 111 .

[0058] The wrench 13 is a ratchet wrench 13 .

[0059] The method for using the disassembly and assembly device 1 for disassembling and assembling a threaded joint in a limited space includes:

[0060] The operator drills the corresponding bottom hole according to the requirements of the drawing. After the bottom hole is drilled, first prepare the threaded joint to be installed, select the installation tool that matches it according to the specifications of the threaded joint, and insert the handle 22 of the installation tool into the through hole 1113 of the fixing block 1111 of the fixing part 111 at the front end of this innovative device until it is inserted into the bottom position, adjust the angle so that the central axis of the installation tool coincides with the longitudinal axis of the device, and the installation tool is in a parallel state when viewed from the horizontal direction. After adjustment, tighten the locking bolts (connecting piece 1112) at both ends of this part to make the fixing block 1111 tightly connected to the overall connecting fixing seat of the device to ensure that it will not loosen during the installation process, and then insert the through groove 1124 of the limit block 1121 of the locking part 112 into the square position at the end of the installation tool, tighten the two locking bolts (locking piece 1122), ensure that the installation tool is locked in place, and prevent the threaded joint installation tool 2 from detaching from this innovative device during use. Finally, the ratchet wrench 13 is inserted into the rear end of the integral base 12. The operator can consider whether to install an extended operating rod according to the actual working environment. At this point, the entire installation device is assembled. At this time, the operator needs to use one hand to hold the device steadily to ensure that no deviation or skew occurs during its rotation. The other hand holds the ratchet wrench 13 and makes a uniform reciprocating swing so that the front end threaded joint is evenly selected into the bottom hole. At the beginning of installation, a square is used to check whether the installation tool is perpendicular to the workpiece surface. After confirming that it is perpendicular, it is only necessary to swing the ratchet wrench 13 at a uniform speed without swinging it at a large angle until the threaded joint is completely screwed into the bottom hole. During the entire installation process, one hand should always hold both sides of the device steadily to balance the rotational force on the installation tool with the force on the hand. When using the ratchet wrench 13, as long as its unidirectional intermittent motion principle is utilized, the threaded joint can be installed by rotating it clockwise, and the installation tool can be withdrawn by rotating it counterclockwise. After the threaded joint is completely screwed in, the ratchet wrench 13 is swung counterclockwise to withdraw the installation tool from the threaded joint, and the installation operation is completed.

[0061] In summary, the disassembly and assembly device for disassembling a threaded joint in a limited space provided by the present invention can

[0062] 1. After being used in production many times, the installation accuracy of the threaded joints has been greatly improved, the verticality of the threaded joints has been ensured, the surface installation quality has been improved, and it is more conducive to the subsequent installation of connectors.

[0063] 2. This device is easy to operate, and the operator does not need to frequently change working posture, which reduces the operator's labor intensity. In addition, the structure is firm and reliable and can be used repeatedly for a long time.

[0064] 3. When the operator uses this device in conjunction with corresponding operating methods and ensures the installation quality, each installation step can shorten the installation time by 70%, thereby improving the installation efficiency.

[0065] 4. This device can be used in conjunction with a ratchet socket to lengthen the longitudinal distance of its installation, playing an important role in a working environment with limited operating space.

[0066] 5. This device can be used with M5, M6, M8, M10, and M12 threaded joint installation tools. It has a wide range of uses and is very suitable for large-scale promotion and use.

[0067] 6. The dimensions and specifications of the interconnected parts of the device are consistent, which is convenient for mass production and assembly of machine tools to achieve widespread synchronous use.

[0068] 7. Accurately control the installation accuracy of the threaded joint to ensure that the threaded joint can be completely screwed into the bottom hole, so that the center axis of the threaded joint is lower than the center axis of the hole and coincides with it, and the angle deviation does not exceed 2°, avoiding the phenomenon of cracking the threaded joint due to excessive force or breaking the front stud of the installation tool.

[0069] 8. The use of this device and the corresponding operation method can minimize the dependence of this work on the operator's skill level, fix and standardize the difficulties and key points in the installation, and use this innovative device to standardize the aspects of the installation that are prone to problems. An innovative operation method has been invented for this device to make the installation process simpler, which is especially suitable for first-time installers.

[0070] 9. It can be adjusted at multiple angles, especially suitable for some places with insufficient operating space. The ratchet handle matched with it can be switched left and right to facilitate the use of different operators. And its fixation is firm and reliable, which can meet the needs of high-intensity work, and it is easy to replace and has high versatility.

[0071] 10. Reduce working time and improve work efficiency. The average installation time of each threaded joint was reduced from 20 minutes to 3 minutes, the efficiency was increased by 6 times, and the qualified rate was 100%.

[0072] 11. Various shapes of threaded joint installation tools can be replaced, with a wide range of applications. Different lengths of extended operating rods can be used according to actual working conditions, and the longitudinal operating length can also be extended to better meet the needs of installation depth.

[0073] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A disassembly and assembly device for disassembling a threaded joint in a limited space, characterized in that: A fixed connection assembly is included for connecting a threaded joint installation tool; A base, the fixed connection assembly is detachably adjusted and fixed on the base; and a wrench to rotate the base; Wherein, the threaded joint installation tool comprises a head and a handle; The fixed connection assembly includes a fixing portion for fixing the handle and a locking portion for fixing the head, and the fixing portion is arranged on one end of the base; Wherein, the fixing part comprises a fixing block and a connecting piece, the fixing block is a regular quadrangular prism, a through hole is provided on the side of the fixing block, and the through hole is concentrically arranged with the tool handle; The fixing block is fixed on the base through a connecting piece; Wherein, the locking part comprises a limit block, a locking member and an adjusting member, an adjusting slot is provided on the base, and the limit block is adjustably fixed on the adjusting slot through the adjusting member; The limit block is provided with a through slot for the installation tool head to pass through, and the limit block fixes the installation tool head through a locking piece; Wherein, the base comprises an adjustment plate and two L-shaped fixing plates arranged in a mirror image, and the two L-shaped fixing plates are connected and fixed by the adjustment plate; The adjusting groove is arranged on the adjusting plate.

2. The disassembly and assembly device for threaded joints in a limited space according to claim 1, characterized in that: Two mutually perpendicular through holes are arranged on the four fixed sides, and the diameters of the two through holes are different.

3. The disassembly and assembly device for threaded joints in a limited space according to claim 2, characterized in that: The base is provided with a fixing groove for fixing the fixing block; The surface of one end of the base connected to the fixing portion is located on the same horizontal plane as the side surface of the fixing block when it is fixed.

4. The disassembly and assembly device for disassembling a threaded joint in a limited space according to claim 3, characterized in that: The adjusting groove is an oblong hole groove; The adjusting plate is fixed to the two L-shaped fixing plates by welding.

5. The disassembly and assembly device for threaded joints in a limited space according to claim 4, characterized in that: The base also includes a connecting head connected to the wrench, and the connecting head is arranged on the other end of the base opposite to the fixing part.

6. The disassembly and assembly device for a threaded joint in a limited space according to any one of claims 1 to 4, characterized in that: The wrench is a ratchet wrench.

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