A device for loading and unloading toothed rotating nuts at the bend joint

Abstract

The application provides a kind of installation and removal device suitable for tooth-shaped rotating nut at elbow joint, including motor, transmission assembly, rotating pawl assembly, rotating pawl assembly with the center axis of tooth-shaped rotating nut as rotating shaft reciprocating swing type rotation along AB direction;In the tooth-shaped rotating nut dismounting condition, rotating pawl assembly along A direction with meshing form drives tooth-shaped rotating nut synchronous rotation, rotating pawl assembly along B direction relative to tooth-shaped rotating nut rotation;In the tooth-shaped rotating nut installation condition, rotating pawl assembly along B direction with meshing form drives tooth-shaped rotating nut synchronous rotation, rotating pawl assembly along A direction relative to tooth-shaped rotating nut rotation;The application is for the special situation of the elbow joint with rotating nut installed perpendicular to wall surface and close to wall surface, can apply effective torque to tooth-shaped rotating nut, and realize the continuous dismounting or installation of tooth-shaped rotating nut, improve the smoothness of operation, can greatly improve the dismounting efficiency.

Description

Technical Field

[0001] This invention relates to the field of special tools for mechanical assembly and maintenance, and in particular to a device for loading and unloading toothed rotating nuts at pipe joints. Background Technology

[0002] In various industrial facilities, pipe bends (or simply "elbows") are key connectors for changing pipeline direction and achieving complex layouts. Typically, pipe bends with swivel nuts are used in pipelines. The core idea of ​​this design is to integrate a nut that can rotate freely around the connector's axis onto the bend body—the "swivel nut." During installation, this type of bend with a swivel nut allows the nut to rotate independently while the bend body remains stationary, facilitating thread tightening within a limited space. Furthermore, the spatial position, overall orientation, and angle of the bend body remain unchanged, simplifying the connection process.

[0003] In practical installation and maintenance scenarios, when this type of elbow with a rotating nut is installed close to the wall with its joint axis perpendicular or nearly perpendicular to the mounting wall, that is, the mating part assembled with the elbow (rotating nut) is perpendicular to the wall, for example: the mating part is a pipe section located inside the wall and perpendicular to the wall (see attached figure). Figure 2 In the case of the connecting pipe section 21), this type of elbow with a rotating nut will face extremely difficult specific assembly problems in practical applications.

[0004] Specifically, in special cases where the mating part is located inside the wall or only a very small portion protrudes from the wall surface, the protrusion is minimal, and the rotating nut is almost entirely submerged in the wall to connect with the mating part. Due to wall interference, conventional installation and removal tools cannot be used. The operator finds it difficult to clamp the nut with the tool's jaws along the side of the nut (i.e., parallel to the wall). Furthermore, due to the elbow body and external pipes (see attached...),... Figure 2 The spatial interference of the external pipe section 22) makes it impossible to fit the sleeve onto the nut in a direction perpendicular to the wall, which makes it impossible to guarantee whether the rotating nut is tightened, and the disassembly and assembly between the rotating nut and the mating part becomes difficult.

[0005] In such special circumstances, operators are often forced to use unsuitable tools (such as needle-nose pliers) for disassembly and assembly. This not only makes it difficult to apply effective torque to the rotating nut, but also prevents the tool from rotating continuously due to interference from the elbow body or external pipes. Every time the tool rotates a certain angle, it needs to be separated from the rotating nut and the tool's posture needs to be readjusted before operation. This undoubtedly leads to extremely low efficiency in pipe disassembly, assembly, and maintenance, and also easily damages the rotating nut and the corresponding thread structure, affecting the connection quality.

[0006] Therefore, for pipe bends with rotating nuts installed perpendicular to the wall, existing general-purpose loading and unloading tools are insufficient to meet the needs for efficient, reliable, and safe operation of pipe bend nuts in extremely confined spaces such as close to the wall. Summary of the Invention

[0007] In view of this, the present invention aims to provide a device for loading and unloading toothed rotating nuts at pipe joints, specifically for pipe joints with rotating nuts installed perpendicular to the wall in extremely confined spaces such as when they are in close contact with the wall, in order to solve the problem that the loading and unloading tools in the prior art are unable to apply effective torque to the rotating nuts and thus are difficult to perform efficient loading and unloading.

[0008] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0009] A device for loading and unloading toothed rotating nuts at pipe bends includes a motor, a transmission assembly, and a rotating pawl assembly. The motor is connected to the rotating pawl assembly via the transmission assembly, causing the rotating pawl assembly to reciprocate and oscillate along the AB direction with the central axis of the toothed rotating nut as its rotation axis. The toothed rotating nut has multiple tooth grooves on the side facing the rotating pawl assembly, and the rotating pawl assembly can engage with the tooth grooves. In the case of disassembling the toothed rotating nut, the rotating pawl assembly drives the toothed rotating nut to rotate synchronously in the A direction in an engaged manner, and the rotating pawl assembly rotates relative to the toothed rotating nut in the B direction. In the case of installing the toothed rotating nut, the rotating pawl assembly drives the toothed rotating nut to rotate synchronously in the B direction in an engaged manner, and the rotating pawl assembly rotates relative to the toothed rotating nut in the A direction.

[0010] Furthermore, the rotating pawl assembly includes a first pawl rod, a second pawl rod, and a switching arm. In the case of disassembling the toothed rotating nut, the switching arm abuts against the second pawl rod, causing the second pawl rod to separate from the toothed rotating nut. The first pawl rod only engages with the tooth groove when swinging along direction A. In the case of installing the toothed rotating nut, the switching arm abuts against the first pawl rod, causing the first pawl rod to separate from the toothed rotating nut. The second pawl rod only engages with the tooth groove when swinging along direction B.

[0011] Furthermore, in the circumferential direction of the toothed rotating nut, guide slopes are provided on both sides of the tooth groove; one side of the end of the first pawl can engage with the tooth groove to stop when swinging in the A direction, and the other side is provided with a first slope; one side of the end of the second pawl can engage with the tooth groove to stop when swinging in the B direction, and the other side is provided with a second slope.

[0012] Furthermore, both the first and second ratchet levers are equipped with elastic reset components.

[0013] Furthermore, the rotating pawl assembly includes a base, one end of the first pawl bar is hinged to the base and the other end extends toward the toothed rotating nut, one end of the second pawl bar is hinged to the base and the other end extends toward the toothed rotating nut, and the switching arm is disposed between the first pawl bar and the second pawl bar, and the switching arm is rotatably connected to the base.

[0014] Furthermore, the rotating pawl assembly includes a switching knob disposed on the side of the base away from the switching arm, the switching arm having a rotation shaft that passes through the base and is connected to the switching knob.

[0015] Furthermore, the base is provided with a fixed seat, which is connected to the base, and an assembly space is formed between the fixed seat and the base. The hinged ends of the first pawl and the second pawl are both located in the assembly space. The hinged end of the first pawl is hinged to the fixed seat and the base, and the hinged end of the second pawl is hinged to the fixed seat and the base.

[0016] Furthermore, a limiting arc is integrally provided on the side of the base near the toothed rotating nut, and a support head is integrally provided on the side of the base away from the toothed rotating nut, the support head being connected to the transmission assembly.

[0017] Furthermore, the transmission assembly includes a turntable, a connecting rod, and a cam. The motor is connected to the rotation center of the turntable, one end of the connecting rod is connected to the outer edge of the turntable, and the other end is connected to the cam arm. The rotating pawl assembly is connected to the rotation center of the cam.

[0018] Furthermore, taking a vertical plane perpendicular to the wall as a reference, the maximum swing angle of the rotating pawl assembly during the reciprocating swing rotation process is 45°-75°.

[0019] Compared with the prior art, the device for loading and unloading toothed rotating nuts at pipe joints described in this invention has the following advantages:

[0020] This invention discloses a device for loading and unloading toothed rotating nuts at pipe bends. Specifically addressing the special circumstances of pipe bends with rotating nuts installed perpendicular to a wall in extremely confined spaces such as when tightly pressed against a wall, the device utilizes a rotating pawl assembly under continuous motor drive. This assembly continuously reciprocates and rotates in a swivel motion, engaging with the toothed rotating nut. The pawl assembly only engages with the toothed rotating nut in a specific rotational direction, rotating relative to the nut during the reverse swing without causing it to rotate. Thus, through the engagement of the pawl assembly with the toothed groove, the pawl assembly can effectively handle the toothed nut. The rotating nut applies effective torque, and during each reciprocating swing, it can make space avoidance of pipe bends and external pipe sections, solving the problem of difficulty in disassembling and assembling the rotating nut due to obstructions from walls, pipe bends, and external pipe sections. During disassembly and assembly, there is no need to separate the loading and unloading device from the toothed rotating nut, nor is there any need to adjust the posture of the loading and unloading device. The continuous operation of the motor is transformed into the continuous swing of the rotating pawl assembly, realizing continuous disassembly or installation of the toothed rotating nut. This improves the smoothness of the operation of the toothed rotating nut, greatly improves the disassembly and assembly efficiency, simplifies the operation process, and ensures construction quality and personnel safety. Attached Figure Description

[0021] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of a toothed rotating nut loading and unloading device for a bend pipe joint, as described in an embodiment of the present invention, in practical application.

[0023] Figure 2 For the embodiments of the present invention in Figure 1 A sectional view of the base at the outer shell;

[0024] Figure 3 This is a simplified structural diagram of the transmission assembly described in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the rotating pawl assembly described in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure for disassembling the toothed rotary nut using the rotary pawl assembly described in an embodiment of the present invention (direction A in the diagram is the disassembly direction).

[0027] Figure 6 For the embodiments of the present invention in Figure 5 A diagram showing an upward-looking perspective;

[0028] Figure 7This is a schematic diagram of the structure of the rotating pawl assembly for installing the toothed rotating nut according to an embodiment of the present invention (direction B in the figure is the installation direction);

[0029] Figure 8 For the embodiments of the present invention in Figure 7 A diagram showing an upward-looking perspective;

[0030] Figure 9 This is a schematic diagram of the maximum rotation angle of the rotating pawl assembly described in this embodiment of the invention during reciprocating oscillating rotation (view perpendicular to the wall).

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

[0032] 1. Wall; 2. Pipe bend joint; 3. Toothed swivel nut; 31. Tooth groove; 32. Guide slope; 4. Rotary pawl assembly; 41. Support head; 411. Shaft hole; 412. Pin hole; 42. Base; 421. Limiting arc; 43. Fixed seat; 44. Switching knob; 45. Switching arm; 46. First spring; 47. First pawl rod; 471. First slope; 48. Second pawl rod; 481. Second slope; 49. Second spring; 5. First pin; 6. First bearing; 7. Connecting shaft; 8. Cam; 9. Second pin; 10. Housing; 11. Connecting rod; 12. Motor; 13. Coupling; 14. Mounting seat; 15. Second bearing; 16. Rotating shaft; 17. Turntable; 18. Snap ring; 19. First key; 20. Second key; 21. Connecting pipe section; 22. External pipe section. Detailed Implementation

[0033] The inventive concepts of this application will be described below using terminology commonly used by those skilled in the art to communicate the essence of their work to others skilled in the art. However, these inventive concepts may be embodied in many different forms and should not be construed as limited to the embodiments described herein.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this invention can be combined with each other. To avoid ambiguity in direction, this application designates the reciprocating oscillating rotation direction of the rotating pawl assembly 4 as direction A and direction B, as shown in the attached figure. Figure 5 , 7 As shown, directions A and B are opposite directions of rotation. If direction A is clockwise, then direction B is counterclockwise. Furthermore, direction AB includes both directions A and B. In addition, the terms "disassembly" and "installation" mentioned in this application refer to the disassembly and assembly relationship between the rotating nut and the connecting pipe section 21.

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] For the special situation of pipe bends with rotating nuts installed perpendicular to the wall in extremely confined spaces such as when they are in close contact with the wall, this embodiment proposes a device for loading and unloading toothed rotating nuts at pipe bends, as shown in the attached figure, to solve the problem that existing loading and unloading tools are difficult to efficiently install and remove the rotating nuts. Figure 1-9 As shown, the loading and unloading device includes a motor 12, a transmission assembly, and a rotating pawl assembly 4. The motor 12 is connected to the rotating pawl assembly 4 through the transmission assembly, so that the rotating pawl assembly 4 reciprocates and swings along the AB direction with the central axis of the toothed rotating nut 3 as the rotation axis. The toothed rotating nut 3 has multiple tooth grooves 31 on the side facing the rotating pawl assembly 4, and the rotating pawl assembly 4 can engage with the tooth grooves 31. In the case of disassembling the toothed rotating nut 3, the rotating pawl assembly 4 drives the toothed rotating nut 3 to rotate synchronously in the A direction in an engaging manner, and the rotating pawl assembly 4 rotates relative to the toothed rotating nut 3 in the B direction (i.e., swings back). In the case of installing the toothed rotating nut 3, the rotating pawl assembly 4 drives the toothed rotating nut 3 to rotate synchronously in the B direction in an engaging manner, and the rotating pawl assembly 4 rotates relative to the toothed rotating nut 3 in the A direction (i.e., swings back).

[0037] It should be noted that, with the central axis of the toothed rotating nut 3 as the reference, the entire rotating pawl assembly 4 performs a reciprocating oscillating rotation. If a certain point of the rotating pawl assembly 4 itself is considered as a reciprocating oscillation, its oscillation trajectory is an arc, not a complete circle, which is used to make space avoidance for the bent pipe joint 2 and the external pipe section 22.

[0038] Furthermore, according to the mechanical definition of "oscillation": the reciprocating mechanical motion of an object about a base point or pivot point, the above "rotating pawl assembly 4 reciprocating oscillating rotation along the AB direction with the central axis of the toothed rotating nut 3 as the rotation axis" can be simply referred to as: the rotating pawl assembly 4 oscillating with the central axis of the toothed rotating nut 3 as the rotation axis. The "reciprocating oscillating rotation" and "reciprocating oscillation" mentioned in this application can also be simply referred to as "oscillation".

[0039] To address the aforementioned special circumstances, the loading and unloading device proposed in this application, under the continuous drive of the motor 12, utilizes a rotating pawl assembly 4 for continuous, uninterrupted reciprocating oscillating rotation and engagement with the toothed rotating nut 3. The rotating pawl assembly 4 only engages with the toothed rotating nut 3 in a specific rotational direction, rotating synchronously. During the reverse oscillation, it rotates relative to the toothed rotating nut 3 without causing it to rotate. Thus, on the one hand, through the engagement of the rotating pawl assembly 4 with the tooth groove 31, the rotating pawl assembly 4 can apply effective torque to the toothed rotating nut 3; on the other hand, during each reciprocating oscillation... During the process, the device can make space avoidance for the bend joint 2 and the external pipe section 22, solving the problem that it is difficult to disassemble and assemble the rotating nut due to the obstruction of the wall 1, bend joint 2, and external pipe section 22. During the disassembly and assembly process, there is no need to separate the loading and unloading device from the toothed rotating nut 3, nor is it necessary to adjust the posture of the loading and unloading device. The continuous operation of the motor 12 is transformed into the continuous swing of the rotating pawl assembly 4, so as to continuously disassemble or install the toothed rotating nut 3, improve the smoothness of the operation of the toothed rotating nut 3, greatly improve the disassembly and assembly efficiency, simplify the operation process, and ensure the construction quality and personnel safety.

[0040] The rotating pawl assembly 4 includes a first pawl bar 47, a second pawl bar 48, and a switching arm 45. In the disassembly phase of the toothed rotating nut 3, the switching arm 45 abuts against the second pawl bar 48, separating the second pawl bar 48 from the toothed rotating nut 3 (no contact). The first pawl bar 47 only engages with the toothed groove 31 when swinging along direction A. In the installation phase of the toothed rotating nut 3, the switching arm 45 abuts against the first pawl bar 47, separating the first pawl bar 47 from the toothed rotating nut 3 (no contact). The second pawl bar 48 only engages with the toothed groove 31 when swinging along direction B. Thus, by setting the switching arm 45 and the two pawl bars, the engagement relationship between the pawl bars and the toothed rotating nut 3 can be switched, enabling the disassembly or installation of the toothed rotating nut 3. The separation of the pawl bar from the toothed rotating nut 3 can be understood as the pawl bar separating from the toothed groove 31 and not making any contact with the toothed rotating nut 3. Meanwhile, the phrase "only engages with the toothed groove 31 when swinging along the A direction (B direction)" in this description essentially means that the toothed rotating nut 3 is driven to rotate synchronously in the A direction (B direction) in an engaging manner, and rotates relative to the toothed rotating nut 3 in the B direction (A direction).

[0041] Since the rotating pawl assembly 4 rotates in a reciprocating swinging manner, in order to ensure that the pawl bar can smoothly disengage from the tooth groove 31 during the reverse swinging process, and to prevent the rotating pawl assembly 4 from causing the toothed rotating nut 3 to rotate in the opposite direction, guide inclined surfaces 32 are provided on both sides of the tooth groove 31 in the circumferential direction of the toothed rotating nut 3. One side of the end of the first pawl bar 47 can engage with the tooth groove 31 to stop when swinging in the A direction, and the other side is provided with a first inclined surface 471. One side of the end of the second pawl bar 48 can engage with the tooth groove 31 to stop when swinging in the B direction, and the other side is provided with a second inclined surface 481. Thus, without affecting the meshing relationship between the pawl and the toothed groove, when the first pawl 47 swings back along direction B or the second pawl 48 swings back along direction A, the corresponding pawl's inclined surface and the guide inclined surface 32 of the toothed groove 31 can slide together. This allows the corresponding pawl to continuously and sequentially slide into or enter the next adjacent toothed groove 31 in the swinging direction during the reverse swing of the rotating pawl assembly 4. This ensures that the pawl can smoothly disengage from the toothed groove 31 during the reverse swing, preventing the rotating pawl assembly 4 from causing the toothed rotating nut 3 to rotate in the opposite direction. Finally, even when the reverse swing reaches its maximum angle, the corresponding pawl can still be located in a toothed groove 31 to ensure the normal stop between the pawl and the toothed groove 31 during the next forward swing, ensuring that the rotating pawl assembly 4 can continuously disassemble or install the toothed rotating nut 3.

[0042] Regarding the specific configuration of the pawl lever, the rotating pawl assembly 4 includes a base 42. The motor 12 is connected to the base 42 via a transmission assembly. One end of the first pawl lever 47 is hinged to the base 42, and the other end extends toward the toothed rotating nut 3. One end of the second pawl lever 48 is hinged to the base 42, and the other end extends toward the toothed rotating nut 3. The switching arm 45 is disposed between the first pawl lever 47 and the second pawl lever 48, and the switching arm 45 is rotatably connected to the base 42. Thus, as the switching arm 45 rotates, it can abut against the first pawl lever 47 or the second pawl lever 48, causing the first pawl lever 47 or the second pawl lever 48 to rotate and separate from the toothed rotating nut 3, preventing contact with the toothed rotating nut 3 during reciprocating oscillating rotation. Preferably, the switching arm 45 has an approximate cam structure; when it rotates in a certain direction, the convex part of the cam structure abuts against the first pawl lever 47 or the second pawl lever 48.

[0043] To avoid ambiguity, each pawl is described as a rod-shaped structure with one end hinged to the base 42, referred to as the hinged end of the pawl, and the other end engaging with the tooth groove 31, referred to as the abutting end of the pawl.

[0044] To facilitate the rotation of the switching arm 45, the rotating pawl assembly 4 includes a switching knob 44, which is located on the side of the base 42 away from the switching arm 45. The switching arm 45 has a rotating shaft that passes through the base 42 and is connected to the switching knob 44, allowing the operator to directly rotate the switching knob 44 by hand to drive the switching arm 45 to rotate without being affected by the spatial interference of the pawl lever.

[0045] Preferably, the base 42 has at least two engaging portions on the side away from the switching arm 45. The switching knob 44 can engage with any of these engaging portions. This prevents the switching arm 45 and the abutted pawl from automatically resetting after the switching knob 44 rotates the switching arm 45 to its final position. Correspondingly, in actual operation, the switching arm 45 is considered to have rotated to its final position once the corresponding engaging portion engages, further improving operational convenience. For example, the engaging portion can be a locking hole, and the switching knob 44 can have a protrusion on the side facing the base 42. As the switching knob 44 rotates, the protrusion engages with the locking hole.

[0046] Both the first pawl lever 47 and the second pawl lever 48 are equipped with elastic reset elements. When the switching arm 45 is in contact with one pawl lever, the elastic reset element provides elastic reset force to the corresponding pawl lever. When the contact action of the switching arm 45 is removed, the corresponding pawl lever can automatically reset. At the same time, for the other pawl lever, under the elastic action of the elastic reset element, it can maintain contact and engagement with the tooth groove 31 in the direction of action. During the reverse swing of the rotating pawl assembly 4, the pawl lever can move smoothly and steadily relative to each tooth groove 31 of the toothed rotating nut 3. After the reverse swing reaches the maximum angle, the pawl lever can still be located in a certain tooth groove 31 and will not separate from the tooth groove 31.

[0047] Regarding the setting of the elastic reset component, specifically: the hinge ends of the first pawl 47 and the second pawl 48 are both equipped with torsion spring structures, so that as the pawl rotates, the torsion spring will deform, thereby providing a reset function for the corresponding pawl; or, the first pawl 47 is equipped with a first spring 46, one end of the first spring 46 is connected to the first pawl 47 and the other end is connected to the base 42, and the second pawl 48 is equipped with a second spring 49, one end of the second spring 49 is connected to the second pawl 48 and the other end is connected to the base 42. The corresponding elastic reset principle is basically the same and will not be described in detail.

[0048] To ensure the structural stability of the ratchet shank hinge, a fixing seat 43 is provided on the base 42. The fixing seat 43 is connected to the base 42 by fasteners, and an assembly space is formed between the fixing seat 43 and the base 42. The hinge ends of the first ratchet shank 47 and the second ratchet shank 48 are both located in the assembly space and are hinged to the fixing seat 43 and the base 42. Thus, the fixing seat 43 helps to improve the structural stability of the ratchet shank hinge and provides a limiting function for the ratchet shank, preventing the hinge ends of the ratchet shank from separating from the base 42.

[0049] A limiting arc 421 is integrally provided on the side of the base 42 near the toothed rotating nut 3, and a support head 41 is integrally provided on the side of the base 42 away from the toothed rotating nut 3. The support head 41 is connected to the transmission component, thereby driving the reciprocating swing of the entire rotating pawl assembly 4. Regarding the function of the limiting arc 421, the limiting arc 421 is concentric with the toothed rotating nut 3 (with the same central axis), which facilitates the alignment of the rotating pawl assembly 4 and the toothed rotating nut 3, and at the same time provides a certain assembly limiting function for the two, avoiding rigid collision between the pawl bar and the tooth groove 31. At the same time, the arc-shaped limiting arc 421 can also provide space avoidance for the bend joint 2 and the external pipe section 22.

[0050] Regarding the transmission-related structure between the motor 12, the transmission assembly, and the rotating pawl assembly 4, the transmission assembly includes a turntable 17, a connecting rod 11, and a cam 8. The motor 12 is connected to the rotation center of the turntable 17. One end of the connecting rod 11 is connected to the outer edge of the turntable 17, and the other end is connected to the convex arm of the cam 8. The rotating pawl assembly 4 is connected to the rotation center of the cam 8. Thus, under the drive of the motor 12, the turntable 17 rotates continuously. One end of the connecting rod 11 rotates with the turntable 17, while the other end, due to space constraints, drives the cam 8 to perform a continuous reciprocating oscillating rotation, thereby realizing the oscillation of the rotating pawl assembly 4.

[0051] Based on the aforementioned transmission assembly, as shown in the appendix Figure 9 As shown, with the vertical plane perpendicular to the wall 1 as the reference, the maximum swing angle (i.e., K1 or K2) of the rotating pawl assembly 4 during the reciprocating swing process is 45°-75°, so that the rotating pawl assembly 4 can drive the toothed rotating nut 3 to rotate at a large angle during a set of reciprocating swings, thereby improving the disassembly and assembly efficiency.

[0052] Regarding the connection between the motor 12 and the turntable 17, the transmission assembly includes a coupling 13. A rotating shaft 16 is positioned at the rotation center of the turntable 17. One side of the coupling 13 is connected to the output shaft of the motor 12, and the other side is connected to the rotating shaft 16. Specifically, the rotating shaft 16 is connected to the turntable 17 via a first key 19, and a retaining spring 18 is fitted over the rotating shaft 16 to further secure it to the turntable 17.

[0053] For the connection between the rotating pawl assembly 4 and the cam 8, a connecting shaft 7 is provided at the rotation center of the cam 8. The connecting shaft 7 is connected to the support head 41. During the disassembly or installation of the toothed rotating nut 3, the central axis of the connecting shaft 7 is collinear with the central axis of the toothed rotating nut 3. Specifically, the cam 8 is connected to the connecting shaft 7 via a second key 20 and is pinned to the connecting shaft 7 via a second pin 9. The support head 41 is provided with a shaft hole 411. The end of the connecting shaft 7 away from the cam 8 is located in or passes through the shaft hole 411. The connecting shaft 7 is pinned to the support head 41 via a first pin 5. Correspondingly, the support head 41 is provided with a corresponding pin hole 412.

[0054] The loading and unloading device includes a housing 10. A mounting base 14 is provided on the side of the housing 10 closest to the motor 12. The motor 12 is connected to the mounting base 14, and the coupling 13 is disposed within the mounting base 14. The housing 10 has a mounting cavity, within which the turntable 17, connecting rod 11, and cam 8 are all disposed. The rotating shaft 16 of the turntable 17 passes through the housing 10 and connects to the coupling 13. The housing 10 is provided with a second bearing 15 corresponding to the rotating shaft 16. The connecting shaft 7 of the cam 8 passes through the housing 10 and connects to the rotating pawl assembly 4. The housing 10 is provided with a first bearing 6 corresponding to the connecting shaft 7. Thus, the housing 10 provides a mounting position for the motor 12, provides protection for the transmission components and coupling 13, ensures the normal operation of the transmission process through the bearings, and facilitates handling of the entire loading and unloading device by the operator.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for loading and unloading toothed rotating nuts at pipe bends, characterized in that, The loading and unloading device includes a motor (12), a transmission assembly, and a rotating pawl assembly (4). The motor (12) is connected to the rotating pawl assembly (4) through the transmission assembly, so that the rotating pawl assembly (4) reciprocates and rotates along the AB direction with the central axis of the toothed rotating nut (3) as the rotation axis. The toothed rotating nut (3) is provided with multiple tooth grooves (31) on the side facing the rotating pawl assembly (4), and the rotating pawl assembly (4) can mesh with the tooth grooves (31). In the case of disassembling the toothed rotating nut (3), the rotating pawl assembly (4) drives the toothed rotating nut (3) to rotate synchronously in the A direction in a meshing manner, and the rotating pawl assembly (4) rotates relative to the toothed rotating nut (3) in the B direction. In the case of installing the toothed rotating nut (3), the rotating pawl assembly (4) drives the toothed rotating nut (3) to rotate synchronously in the B direction in a meshing manner, and the rotating pawl assembly (4) rotates relative to the toothed rotating nut (3) in the A direction.

2. The device for loading and unloading toothed rotating nuts at pipe bends according to claim 1, characterized in that, The rotating pawl assembly (4) includes a first pawl bar (47), a second pawl bar (48), and a switching arm (45). In the case of disassembling the toothed rotating nut (3), the switching arm (45) abuts against the second pawl bar (48), causing the second pawl bar (48) to separate from the toothed rotating nut (3). The first pawl bar (47) only engages with the tooth groove (31) when swinging along direction A. In the case of installing the toothed rotating nut (3), the switching arm (45) abuts against the first pawl bar (47), causing the first pawl bar (47) to separate from the toothed rotating nut (3). The second pawl bar (48) only engages with the tooth groove (31) when swinging along direction B.

3. The device for loading and unloading toothed rotating nuts at pipe bends according to claim 2, characterized in that, In the circumferential direction of the toothed rotating nut (3), guide slopes (32) are provided on both sides of the tooth groove (31); one side of the end of the first pawl bar (47) can engage with the tooth groove (31) when swinging in the A direction, and the other side is provided with a first slope (471); one side of the end of the second pawl bar (48) can engage with the tooth groove (31) when swinging in the B direction, and the other side is provided with a second slope (481).

4. The device for loading and unloading toothed rotating nuts at pipe bends according to claim 2, characterized in that, Both the first pawl (47) and the second pawl (48) are provided with elastic reset elements.

5. The device for loading and unloading toothed rotating nuts at pipe bends according to claim 2, characterized in that, The rotating pawl assembly (4) includes a base (42), one end of the first pawl bar (47) is hinged to the base (42), and the other end extends toward the toothed rotating nut (3), one end of the second pawl bar (48) is hinged to the base (42), and the other end extends toward the toothed rotating nut (3), and the switching arm (45) is disposed between the first pawl bar (47) and the second pawl bar (48), and the switching arm (45) is rotatably connected to the base (42).

6. The device for loading and unloading toothed rotating nuts at pipe bends according to claim 5, characterized in that, The rotating pawl assembly (4) includes a switching knob (44) which is located on the side of the base (42) away from the switching arm (45). The switching arm (45) has a rotating shaft that passes through the base (42) and is connected to the switching knob (44).

7. The device for loading and unloading toothed rotating nuts at pipe bends according to claim 5, characterized in that, The base (42) is provided with a fixed seat (43), the fixed seat (43) is connected to the base (42), and an assembly space is formed between the fixed seat (43) and the base (42). The hinged end of the first pawl (47) and the hinged end of the second pawl (48) are both set in the assembly space. The hinged end of the first pawl (47) is hinged to the fixed seat (43) and the base (42), and the hinged end of the second pawl (48) is hinged to the fixed seat (43) and the base (42).

8. The device for loading and unloading toothed rotating nuts at pipe bends according to claim 5, characterized in that, The base (42) has an integrally provided limiting arc (421) on the side close to the toothed rotating nut (3), and an integrally provided support head (41) on the side away from the toothed rotating nut (3). The support head (41) is connected to the transmission assembly.

9. The device for loading and unloading toothed rotating nuts at pipe bends according to claim 1, characterized in that, The transmission assembly includes a turntable (17), a connecting rod (11), and a cam (8). The motor (12) is connected to the rotation center of the turntable (17). One end of the connecting rod (11) is connected to the outer edge of the turntable (17), and the other end is connected to the convex arm of the cam (8). The rotating pawl assembly (4) is connected to the rotation center of the cam (8).

10. A device for loading and unloading toothed rotating nuts at pipe bends according to claim 5, characterized in that, With the vertical plane perpendicular to the wall (1) as a reference, the maximum swing angle of the rotating pawl assembly (4) during the reciprocating swing rotation process is 45°-75°.

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