Tightening and loosening device for threaded connection
By designing a limiting structure for the inner and outer retaining rings and utilizing a torsion bar to transmit large torque, the problem of difficulty in applying torque and loosening in threaded connections is solved, thereby improving operational efficiency and construction speed.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU INTERMENT TECH
- Filing Date
- 2025-03-31
- Publication Date
- 2026-04-14
AI Technical Summary
In existing technologies, threaded connections are difficult to apply torque to, are prone to loosening, are cumbersome to operate, have slow construction speeds, and are labor-intensive, especially inefficient during batch installations.
A tightening and loosening device for threaded connections is designed, including an inner retaining ring and an outer retaining ring. Through the synergistic action of the first circumferential limiting structure and the second circumferential limiting structure, a large torque is transmitted by a torsion bar. Combined with the axial limiting structure, efficient tightening is achieved, loosening is prevented, and operation is simplified.
It achieves efficient tightening and loosening with high torque, simplifies the operation process, improves operation efficiency, and is especially suitable for batch installation work sites.
Smart Images
Figure CN224115585U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of threaded connections, and more specifically, to a tightening and loosening device for threaded connections. Background Technology
[0002] In industries such as steel, chemical, pharmaceutical, energy, food, and environmental protection, various pipe fittings are frequently encountered for connection, especially for porous thin-walled metal pipes. Threaded structures, as a common connection method, are widely used in current technology. Currently, pipe wrenches or ordinary torque wrenches are generally used to tighten and connect pipe fittings. This method has several drawbacks: torque is difficult to apply, leading to insufficient tightening and potential thread loosening; the operation is cumbersome, the construction speed is slow, the labor intensity for operators is high, and the efficiency is low, especially for work sites requiring batch installations. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to provide a tightening and loosening device for threaded connections that is simple in structure, easy to operate, and can achieve high torque tightening.
[0004] To achieve the above objectives, this utility model provides a tightening and loosening device for threaded connections, the technical solution of which is as follows:
[0005] A threaded connection tightening and loosening device includes an inner retaining ring and an outer retaining ring sequentially sleeved on an external threaded component, and a torsion bar connected to the outside of the outer retaining ring; a first circumferential limiting structure is provided between the inner retaining ring and the external threaded component, the first circumferential limiting structure being used to restrict the mutual rotation between the inner retaining ring and the external threaded component; the first circumferential limiting structure includes a locating pin and a groove that cooperate with each other; a second circumferential limiting structure is provided between the inner retaining ring and the outer retaining ring, the second circumferential limiting structure being used to restrict the mutual rotation between the inner retaining ring and the outer retaining ring, the second circumferential limiting structure including a locating hole and a stop shaft that cooperate with each other.
[0006] This utility model's threaded connection tightening and loosening device, through the coordinated action of the first and second circumferential limiting structures, applies a large torque to the inner and outer retaining rings via a torsion bar and efficiently transmits it to the external threaded component, thereby improving the tightness and effectively preventing thread loosening. Furthermore, the inner and outer retaining rings are easy to install and remove, significantly improving the efficiency of thread tightening and loosening operations, making it particularly suitable for work sites requiring batch installation.
[0007] As a further improvement to the aforementioned tightening and loosening device for threaded connections: the locating pin is located on the inner wall of the inner retaining ring, and the groove is located on the outer wall of the outer threaded component. Therefore, the structure is simple, facilitates rapid positioning, and provides good limiting effect.
[0008] As a further improvement to the aforementioned threaded connection tightening and loosening device, the first circumferential limiting structure consists of two sets. This results in more even force distribution on each component, extending its service life.
[0009] As a further improvement to the aforementioned threaded connection tightening and loosening device: the positioning hole is located on the inner retaining ring, the stop shaft is connected to the torsion bar, and the outer retaining ring has a through hole for the stop shaft to be inserted. Therefore, the structure is simple, facilitates rapid positioning, and provides good limiting effect.
[0010] As a further improvement to the aforementioned threaded connection tightening and loosening device, the positioning holes are distributed in a ring on the inner retaining ring. This improves operational efficiency.
[0011] As a further improvement to the aforementioned tightening and loosening device for threaded connections, a reversing structure is also included to control the radial reciprocating motion of the stop shaft along the outer retaining ring. This reversing structure includes a support between the outer retaining ring and the torsion bar, a pawl at the inner end of the stop shaft, a spring at the outer end of the stop shaft, and a control shaft connected to the stop shaft. The support has a blind hole adapted to the stop shaft and the spring, and a channel for the control shaft to move radially along the outer retaining ring. Thus, the movement of the control shaft controls the insertion and disengagement of the stop shaft from the positioning hole, thereby adjusting the applied torque position. The operator does not need to rotate with the outer retaining ring, resulting in a simple structure and convenient operation.
[0012] As a further improvement to the aforementioned tightening and loosening device for threaded connections, an axial limiting structure is also included to restrict the axial movement of the outer retaining ring along the external threaded component. This makes force transmission smoother and more efficient.
[0013] As a further improvement to the aforementioned threaded connection tightening and loosening device: the outer retaining ring is formed by two semi-circular rings fixedly connected by a pin and a latch, and the axial limiting structure includes two annular protrusions on the outer wall of the inner retaining ring, with the outer retaining ring confined between the two annular protrusions. Therefore, the axial limiting structure is simple in structure, easy to manufacture, has a good limiting effect, and the outer retaining ring can be quickly installed and removed.
[0014] As a further improvement to the aforementioned threaded connection tightening and loosening device: the axial limiting structure includes an annular protrusion and a baffle on the outer wall of the inner retaining ring, the outer retaining ring being confined between the annular protrusion and the baffle, and the baffle being detachably connected to the end of the inner retaining ring. This is particularly suitable for the assembly and disassembly of one-piece molded outer retaining rings. The outer retaining ring has high strength and can withstand large torques, resulting in more efficient force transmission between components during torque application. Preferably, there are four baffles symmetrically distributed, which makes the force on each component more even and extends its service life.
[0015] As a further improvement to the aforementioned tightening and loosening device for threaded connections, the inner retaining ring is composed of two semi-circular rings joined together. This makes the installation and removal of the inner retaining ring convenient.
[0016] As can be seen, the screw-on tightening and loosening device of this utility model has a simple structure, low manufacturing cost, and convenient operation. It can be quickly installed and used, and can achieve high torque tightening and loosening. It has great market competitiveness in batch operation sites, and has a great advantage in the screw connection of multi-hole metal thin-walled tubes.
[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Additional aspects and advantages of the present invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention. Attached Figure Description
[0018] The accompanying drawings, which form part of this utility model, are used to aid in understanding this utility model. The content provided in the drawings and the related descriptions in this utility model can be used to explain this utility model, but do not constitute an undue limitation of this utility model. In the drawings:
[0019] Figure 1 This is an axial schematic diagram of the threaded connection tightening and loosening device of Embodiment 1 of this utility model.
[0020] Figure 2 This is a radial schematic diagram of the threaded connection tightening and loosening device of Embodiment 1 of this utility model.
[0021] Figure 3 This is a schematic diagram of the screw-on and loosening device for threaded connection according to Embodiment 2 of this utility model.
[0022] Figure 4 This is a schematic diagram of the inner retaining ring in the threaded connection tightening and loosening device of Embodiment 3 of this utility model.
[0023] The relevant markings in the above figures are:
[0024] 110 - Internal threaded hole part, 111 - External thread, 120 - External threaded part, 121 - Internal thread, 130 - Conventional fastener, 200 - Internal snap ring, 300 - External snap ring, 310 - Pin, 320 - Pin, 400 - Torsion bar, 510 - Locating pin, 520 - Locating hole, 530 - Stop shaft, 610 - Annular protrusion, 620 - Baffle, 630 - Screw, 640 - Flange ball head plunger, 710 - Support, 720 - Pawl, 730 - Spring, 740 - Control shaft, 750 - Channel. Detailed Implementation
[0025] The present invention will now be clearly and completely described in conjunction with the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly noted that:
[0026] The technical solutions and features provided in the various parts of this utility model, including the following description, can be combined with each other without conflict.
[0027] Furthermore, the embodiments of the present invention described below are generally only a part of the embodiments of the present invention, and not all of the embodiments. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the protection scope of the present invention.
[0028] Regarding the terminology and units used in this utility model: The terms "comprising," "having," and any variations thereof in the specification, claims, and related parts of this utility model are intended to cover non-exclusive inclusion. Example 1
[0029] Figure 1 This is an axial schematic diagram of the threaded connection tightening and loosening device in this embodiment. Figure 2 This is a radial schematic diagram of the threaded connection tightening and loosening device in this embodiment.
[0030] like Figure 1-2 The threaded connection tightening and loosening device shown is used to connect the internal threaded component 110 and the external threaded component 120. Both the internal threaded component 110 and the external threaded component 120 are tubular components. The outer wall of the internal threaded component 110 is provided with an external thread 111, and the inner wall of the external threaded component 120 is provided with an internal thread 121.
[0031] The threaded connection tightening and loosening device includes an inner retaining ring 200 and an outer retaining ring 300 sequentially sleeved on the outer threaded component 120, a torsion bar 400 connected to the outside of the outer retaining ring 300, a first circumferential limiting structure between the inner retaining ring 200 and the outer threaded component 120, and a second circumferential limiting structure and an axial limiting structure between the inner retaining ring 200 and the outer retaining ring 300. The inner retaining ring 200 is composed of two semi-circular rings joined together. The outer retaining ring 300 is composed of two semi-circular rings, one end of which is hinged by a pin 310, and the other end is fixedly connected by a pin 320.
[0032] The first circumferential limiting structure is used to restrict the mutual rotation between the inner retaining ring 200 and the outer threaded component 120. The first circumferential limiting structure includes a locating pin 510 disposed on the inner wall of the inner retaining ring 200 and a groove disposed on the outer wall of the outer threaded component 120. There are two sets of the first circumferential limiting structures, which are symmetrically distributed.
[0033] The second circumferential limiting structure is used to restrict the relative rotation between the inner retaining ring 200 and the outer retaining ring 300. The second circumferential limiting structure includes a positioning hole 520 on the inner retaining ring 200 and a stop shaft 530 connected to the torsion bar 400. The outer retaining ring 300 has a through hole through which the stop shaft 530 passes. The positioning holes 520 are distributed circumferentially on the inner retaining ring 200.
[0034] The axial limiting structure is used to restrict the outer retaining ring 300 from moving axially along the external threaded part 120. The axial limiting structure includes two annular protrusions 610 provided on the outer wall of the inner retaining ring 200, and the outer retaining ring 300 is limited between the two annular protrusions 610.
[0035] In use, firstly, the internal threaded part 110 is fixed with the conventional fastener 130. The inner retaining ring 200 is locked and positioned with the outer threaded part 120 by the cooperation of the positioning pin 510 and the groove. Then, the outer retaining ring 300 is fitted onto the outer wall of the inner retaining ring 200. Then, the two semi-circular rings of the outer retaining ring 300 are locked with the pin 320. Then, the torque is applied to the torsion bar 400 to tighten or loosen the ring. Example 2
[0036] Figure 3 This is a schematic diagram of the screw-on and loosening device for threaded connections in this embodiment.
[0037] Compared with Example 1, the difference in the threaded connection tightening / loosening device of this embodiment is: (e.g.) Figure 3 As shown, it also includes a reversing structure for controlling the radial reciprocating motion of the stop shaft 530 along the outer retaining ring 300. The reversing structure includes a support 710 disposed between the outer retaining ring 300 and the torsion bar 400, a pawl 720 disposed at the inner end of the stop shaft 530, a spring 730 disposed at the outer end of the stop shaft 530, and a control shaft 740 connected to the stop shaft 530. The support 710 is provided with a blind hole adapted to the stop shaft 530 and the spring 730 and a channel 750 for the control shaft 740 to move radially along the outer retaining ring 300.
[0038] In use, the control shaft 740 moves outward to drive the stop shaft 530 outward and compress the spring 730. When the control shaft 740 moves outward to the outer end of the channel 750, the vertical end face of the pawl 720 is located outside the inner retaining ring 200, and the rotation between the inner retaining ring 200 and the outer retaining ring 300 will no longer be restricted. Then, the outer retaining ring 300 is rotated. When the stop shaft 530 rotates to align with the next positioning hole 520, the stop shaft 530 will move inward under the force of the spring 730 restoring its deformation. When the control shaft 740 moves inward to the inner end of the channel 750, the pawl 710 is fully inserted into the positioning hole 520, which can again restrict the rotation between the inner retaining ring 200 and the outer retaining ring 300. Then, the tightening or loosening operation can be performed. Example 3
[0039] Figure 4 This is a schematic diagram of the inner retaining ring in the threaded connection tightening and loosening device of this embodiment.
[0040] Compared with Example 1, the difference in the threaded connection tightening / loosening device of this embodiment is: (e.g.) Figure 4 As shown, for the integrally molded outer retaining ring 300, the corresponding axial limiting structure includes an annular protrusion 610 and a baffle 620 disposed on the outer wall of the inner retaining ring 200. The outer retaining ring 300 is limited between the annular protrusion 610 and the baffle 620. The baffle 620 is detachably connected to the end of the inner retaining ring 200 by a screw 630 and a flange ball plunger 640. There are four baffles 620, which are symmetrically distributed.
[0041] In use, the outer retaining ring 300 is fitted onto the inner retaining ring 200 along the axial direction, and then the baffle 620 is adjusted to limit the axial movement of the outer retaining ring 300.
[0042] The foregoing has described the relevant content of this utility model. Those skilled in the art will be able to implement this utility model based on these descriptions. All other embodiments obtained by those skilled in the art based on the above description of this utility model without inventive effort should fall within the protection scope of this utility model.
Claims
1. A tightening and loosening device for threaded connections, characterized in that: It includes an inner retaining ring (200) and an outer retaining ring (300) sequentially fitted onto the outer threaded component (120), and a torsion bar (400) connected to the outside of the outer retaining ring (300); A first circumferential limiting structure is provided between the inner retaining ring (200) and the outer threaded part (120). The first circumferential limiting structure is used to restrict the rotation between the inner retaining ring (200) and the outer threaded part (120). The first circumferential limiting structure includes a locating pin (510) and a groove that cooperate with each other. A second circumferential limiting structure is provided between the inner retaining ring (200) and the outer retaining ring (300). The second circumferential limiting structure is used to restrict the rotation between the inner retaining ring (200) and the outer retaining ring (300). The second circumferential limiting structure includes a positioning hole (520) and a stop shaft (530) that cooperate with each other.
2. The tightening and loosening device for threaded connections as described in claim 1, characterized in that: The positioning pin (510) is located on the inner wall of the inner retaining ring (200), and the groove is located on the outer wall of the outer threaded part (120).
3. The tightening and loosening device for threaded connections as described in claim 1, characterized in that: The first circumferential limiting structure consists of two sets.
4. The tightening and loosening device for threaded connections as described in claim 1, characterized in that: The positioning hole (520) is provided on the inner retaining ring (200), the stop shaft (530) is connected to the torsion bar (400), and the outer retaining ring (300) is provided with a through hole for the stop shaft (530) to be inserted.
5. The tightening and loosening device for threaded connections as described in claim 4, characterized in that: The positioning holes (520) are distributed in a ring on the inner retaining ring (200).
6. The tightening and loosening device for threaded connections as described in claim 4, characterized in that: It also includes a reversing structure for controlling the radial reciprocating motion of the stop shaft (530) along the outer retaining ring (300). The reversing structure includes a support (710) between the outer retaining ring (300) and the torsion bar (400), a pawl (720) at the inner end of the stop shaft (530), a spring (730) at the outer end of the stop shaft (530), and a control shaft (740) connected to the stop shaft (530). The support (710) is provided with a blind hole adapted to the stop shaft (530) and the spring (730) and a channel (750) for the control shaft (740) to move radially along the outer retaining ring (300).
7. The tightening and loosening device for threaded connections as described in claim 1, characterized in that: It also includes an axial limiting structure for restricting the axial movement of the outer circlip (300) along the outer threaded part (120).
8. The tightening and loosening device for threaded connections as described in claim 7, characterized in that: The outer retaining ring (300) is formed by two semi-circular rings fixedly connected by a pin (310) and a latch (320). The axial limiting structure includes two annular protrusions (610) provided on the outer wall of the inner retaining ring (200). The outer retaining ring (300) is limited between the two annular protrusions (610).
9. The tightening and loosening device for threaded connections as described in claim 7, characterized in that: The axial limiting structure includes an annular protrusion (610) and a baffle (620) on the outer wall of the inner retaining ring (200). The outer retaining ring (300) is limited between the annular protrusion (610) and the baffle (620). The baffle (620) is detachably connected to the end of the inner retaining ring (200).
10. The tightening and loosening device for threaded connections as described in claim 1, characterized in that: The inner retaining ring (200) is composed of two semi-circular rings joined together.