A quick-adjust pipe clamp

Abstract

The invention discloses a quick-adjust pipe clamp, comprising a fixed clamp body, a movable clamp body that can move forward and backward relative to the fixed clamp body, an adjusting element for adjusting the position of the movable clamp body is arranged on the fixed clamp body, the adjusting element is movably connected with the fixed clamp body, so that the adjusting element has an engagement position engaged with the movable clamp body and a separation position separated from the movable clamp body, and a clutch mechanism that can switch the adjusting element between the engagement position and the separation position is arranged on the fixed clamp body. The invention can quickly adjust the size of the jaws, so as to facilitate clamping and rotating pipes of different specifications and sizes.

Description

Technical Field

[0001] The invention relates to the technical field of hardware tool manufacturing, in particular to a quick-adjust pipe clamp. Background Art

[0002] A pipe clamp is a hardware tool mainly used for clamping and rotating steel pipe fittings. Existing pipe clamps usually include a movable clamp body and a fixed clamp body with a gripping portion. The movable clamp body includes a sliding rod, and the front end of the sliding rod is bent to form movable clamp teeth, so that the movable clamp body is L-shaped. A mounting portion is provided at the front end of the fixed clamp body, and fixed clamp teeth are provided at the front end of the mounting portion. A sliding through groove that passes through the front and back is provided on the mounting portion, and the sliding rod is slidably connected in the sliding through groove, so that the movable clamp teeth and the fixed clamp teeth are arranged relative to each other to form a jaw with a large mouth and a small inside. In addition, a rotatable adjusting worm is provided on the connecting portion, and worm teeth that mesh with the adjusting worm are provided on the movable rod. When we rotate the adjusting worm, we can drive the movable rod to move back and forth in the sliding through groove, so as to adjust the size of the jaw between the movable clamp teeth and the fixed clamp teeth to adapt to pipe fittings of different sizes.

[0003] When it is necessary to clamp and rotate a round pipe, first adjust the position of the movable jaw body relative to the fixed jaw body by adjusting the worm, so that the jaws between the movable jaw teeth and the fixed jaw teeth match the diameter of the pipe fitting, and then squeeze the round pipe into the jaws of the movable jaw teeth and the fixed jaw teeth. At this time, the pipe fitting is tightly attached to the movable jaw teeth and the fixed jaw teeth. When we hold the grip of the fixed jaw body and rotate the pipe clamp, the friction between the fixed jaw teeth, the movable jaw teeth and the pipe fitting can drive the pipe fitting to rotate.

[0004] Since the adjusting worm and the sliding rod form a worm gear meshing relationship, when we rotate the adjusting worm, the driving force and torque required to rotate the adjusting worm can be effectively reduced, but it also causes the sliding rod to move back and forth slowly. In particular, when we need to frequently switch back and forth to clamp and rotate two pipes with very different sizes, the existing adjustment structure of the movable clamp body will cause great trouble and is not conducive to improving work efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of slow speed and low efficiency in adjusting the jaw size between movable jaw teeth and fixed jaw teeth in existing pipe clamps, and to provide a quick-adjust pipe clamp that can quickly adjust the jaw size, thereby facilitating the clamping and rotation of pipes of different specifications and sizes.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A quick-adjust pipe clamp comprises a fixed clamp body and a movable clamp body which can move forward and backward relative to the fixed clamp body. An adjusting element for adjusting the position of the movable clamp body is arranged on the fixed clamp body. The adjusting element is movably connected with the fixed clamp body so that the adjusting element has an engaging position for engaging with the movable clamp body and a disengaging position for disengaging from the movable clamp body. A clutch mechanism is arranged on the fixed clamp body for switching the adjusting element between the engaging position and the disengaging position.

[0008] Different from the prior art, the adjusting element of the present invention is movably connected to the fixed jaw body, and a clutch mechanism is provided on the fixed jaw body, so that the adjusting element can be quickly switched back and forth between the engaged position and the disengaged position. When the adjusting element is in the disengaged position, the adjusting element is disengaged from the movable jaw body. At this time, the forward and backward movement of the movable jaw body is not constrained by the adjusting element. Therefore, we can directly and quickly move the movable jaw body forward and backward to a position that roughly matches the specifications and dimensions of the pipe fitting, and then use the clutch mechanism to quickly switch the adjusting element from the disengaged position to the engaged position. At this time, the adjusting element is engaged with the movable jaw body, and we can fine-tune the position of the movable jaw body through the adjusting element, so that the jaw size between the movable jaw body and the fixed jaw body accurately matches the pipe fitting. Similarly, when we need to clamp a pipe with completely different specifications and sizes, we can first use the clutch mechanism to switch the adjustment element to the separation position, then quickly move the movable jaw body forward and backward to a position that roughly matches the specifications and sizes of the pipe, then use the clutch mechanism to switch the adjustment element to the engagement position, and fine-tune the front and rear positions of the movable jaw body through the adjustment element, so that the jaw size between the movable jaw body and the fixed jaw body accurately matches the pipe. That is to say, the present invention enables the adjustment element to be switched to a separation position disengaged from the movable jaw body through a clutch mechanism, so that the adjustment element has a fast adjustment "coarse adjustment" state and a fine adjustment "fine adjustment" state, which can not only realize the fast adjustment of the jaw size, thereby facilitating the improvement of work efficiency, but also realize the fine adjustment of the jaw size to ensure that the jaw size matches the specifications and sizes of the pipe.

[0009] Preferably, the fixed pliers body is provided with a mounting through hole extending through the front and rear sides and a sliding through hole extending through the front and rear ends longitudinally, the mounting through hole is communicated with the sliding through hole, the adjusting element is a worm which is longitudinally located in the mounting through hole and has a worm shaft, the movable pliers body includes an adjusting section which is movably arranged in the sliding through hole, and the adjusting section is provided with worm teeth which mesh with the worm near the lower side of the adjusting element.

[0010] Through the cooperation of the worm and the worm gear, the adjusting element can finely adjust the movable pliers and realize the self-positioning of the movable pliers in the front-back direction, so as to avoid the automatic opening of the jaws when the pipe clamp is used. It can be understood that we can easily move and switch the worm between the engagement position and the disengagement position to realize the engagement or disengagement between the worm and the worm gear. In particular, the sliding passage that runs through the front and back is convenient for the user to hold and rotate the worm with his fingers.

[0011] Preferably, a countersunk hole is provided on the rear side of the fixed pliers body, a sealing cover is provided in the countersunk hole, the mounting through hole passes through the sealing cover, the mounting through hole is located on the front and rear side walls in the longitudinal direction of the fixed pliers body, and sliding grooves extending in the transverse direction are respectively provided, and the front and rear ends of the worm shaft are respectively located in the sliding grooves on the corresponding side of the mounting through hole.

[0012] Since the adjusting element is mainly subjected to longitudinal forces when working, the fixed pliers body of the present invention adopts a spliced ​​structure, in which the countersunk holes cover the mounting holes and the sliding grooves, so that the mounting holes and the sliding grooves on the fixed pliers body are called open structures, which are convenient for forming by forging and other processes, which is beneficial to improving the structural strength and reducing the weight, and is convenient for processing and assembly, and will not have a negative impact on the strength and force of the fixed pliers body, the adjusting element and other components.

[0013] Preferably, the clutch mechanism comprises a clutch link having a hinged end and a connecting end, the hinged end of the clutch link being provided with a hinged shaft hinged to a fixed caliper body, one end of the worm shaft being hinged to the fixed caliper body, the other end of the worm shaft being slidingly connected to the connecting end of the clutch link, and a rotating handle being provided on the hinged shaft of the clutch link.

[0014] It can be understood that the worm shaft and the clutch connecting rod are connected to form a triangular structure. Since the worm shaft and the clutch connecting rod are connected in a sliding manner, when the user turns the rotating handle in the forward direction, the clutch connecting rod can be driven to rotate through the hinge shaft. At this time, the worm shaft that is slidably connected to the clutch connecting rod can rotate, so that the worm and the worm gear are separated and enter the separation position. Of course, at this time, the connection point position of the clutch connecting rod and the worm shaft will move and change accordingly. When the user turns the rotating handle in the reverse direction, the worm shaft can be driven to rotate in the reverse direction and switch to the engagement position. In addition, since one end of the worm shaft is hinged on the fixed pliers body, the worm shaft and the worm can be prevented from moving in the longitudinal direction in the front and rear directions.

[0015] Preferably, the connecting end of the clutch connecting rod is provided with a sliding ring sleeve movably mounted on the worm shaft, and when the worm is in the engaged position, the angle between the clutch connecting rod and the worm shaft is between 80 degrees and 100 degrees.

[0016] The worm shaft can slide in the sliding ring sleeve, so that a sliding connection can be formed between the worm shaft and the clutch connecting rod, and at the same time, the worm shaft and the clutch connecting rod can be effectively prevented from being separated from each other, and the assembly between the worm shaft and the clutch connecting rod is convenient. In particular, when the worm is in the engaged position, the angle between the clutch connecting rod and the worm shaft is between 80 degrees and 100 degrees, so that the clutch connecting rod and the worm shaft can form a self-locking, so that the clutch connecting rod can form a reliable support for the worm shaft, and prevent the worm from being separated from the movable pliers body.

[0017] Preferably, a radial screw hole is provided at the end of the articulated shaft extending out of the fixed pliers body, a sleeve hole is provided on the rotating handle and is sleeved on the articulated shaft, a positioning hole passing through the sleeve hole is provided on the side of the rotating handle corresponding to the position of the radial screw hole, a positioning screw is provided in the positioning hole, and the inner end of the positioning screw is threadedly connected to the radial screw hole.

[0018] The positioning screw can conveniently connect the rotating handle and the articulated shaft into one piece on the one hand, and can play a role similar to a pin on the other hand, so that the rotating handle can transmit torque to the articulated shaft.

[0019] Preferably, both ends of the worm shaft are respectively slidably connected to the fixed caliper body, and the clutch mechanism includes a clutch handle with one end hinged to the fixed caliper body, an elastic element arranged on the fixed caliper body to elastically position the worm in an engagement position, and a driving protrusion is provided in the middle of the clutch handle, which abuts against the side of the worm close to the movable caliper body.

[0020] In this scheme, the two ends of the worm shaft are slidably connected to the fixed pliers body, so the worm can translate relative to the movable pliers body, and the elastic element therein can automatically reset the worm from the disengaged position to the engaged position. When the user rotates the clutch handle forward, the driving protrusion in the middle of the clutch handle can push the worm to overcome the elastic force of the elastic element and move toward the side away from the movable pliers body, and the worm is switched from the engaged position to the disengaged position. When the user releases the clutch handle, the elastic force of the elastic element drives the worm to translate and reset to the engaged position, thereby realizing the automatic reset of the worm and facilitating operation.

[0021] Preferably, the clutch handle includes a clutch plate rod respectively arranged on the front and rear sides of the fixed caliper body, the front end of the clutch plate rod is hinged on the fixed caliper body, the rear end of the clutch plate rod is connected into one piece through a connecting plate, and the driving protrusion is a semicircular plate integrally arranged on the lower side of the clutch plate rod.

[0022] The clutch plate rod and the connecting plate are connected to form a U-shaped clutch handle, so that the clutch handle is firmly hinged on the fixed pliers body. Accordingly, the driving protrusions on the clutch plate rods on the front and rear sides simultaneously push the worm on the front and rear sides, so that the worm moves smoothly. In particular, the driving protrusion is semicircular, so when the clutch handle rotates, the driving protrusion can always maintain point contact with the worm, which is conducive to reducing the friction between the two.

[0023] Preferably, the elastic element comprises two front and rear return springs, and the return springs respectively press against the lower side of the worm shaft at one end.

[0024] The two front and rear return springs ensure that the forces at the front and rear ends of the worm shaft are balanced, so that the worm can move up and down smoothly and avoid tilting when it moves.

[0025] Preferably, accommodating grooves are respectively provided on the upper and lower sides of the sliding through hole, and a connecting piece is provided between the rear side of the adjusting section and the sliding through hole. The upper and lower side edges of the connecting piece are bent forward to form a locking piece that abuts the adjusting section, and the upper and lower locking pieces are respectively located in the accommodating grooves on the corresponding side. A rectangular punching hole is provided on the lower locking piece, and the width edge of one side of the rectangular punching hole is integrally extended outward to form a spring piece that presses against the bottom wall of the accommodating groove, and a compression spring is provided in the upper accommodating groove to press against the upper locking piece.

[0026] Since the upper and lower sides of the connecting piece are bent to form a positioning piece, a U-shaped groove is formed. At this time, the adjustment section of the movable pliers body is located in the U-shaped groove. The spring piece connected to the positioning piece at one end forms a cantilever beam structure. When the suspended end of the spring piece is compressed and bent, a corresponding elastic force can be generated. Therefore, the compression spring forms a force for the front end of the connecting section to swing downward, and the spring piece forms a force for the front end of the connecting section to swing upward. The elastic force of the compression spring and the spring piece makes the adjustment section elastically positioned in the middle position of the sliding through hole. In other words, at this time, there is a gap between the adjustment section and the upper and lower sides of the sliding through hole. When we clamp the jaws of the pipe clamp to the pipe fitting, the movable pliers body will swing upward at an angle. At this time, the compression spring makes the jaws of the movable pliers body and the fixed pliers body form a pre-tightened clamping force on the pipe fitting, thereby effectively avoiding the slippage between the jaws and the pipe fitting when the pipe clamp is turned.

[0027] It is understandable that, compared with the existing compression spring, the spring sheet can minimize the size of the accommodating groove, thereby reducing the external dimensions of the mounting portion in the vertical width direction, and the spring sheet can be integrally formed with the connecting sheet and the positioning sheet through a stamping process, thereby simplifying the manufacturing process and facilitating assembly. The compression spring can enable the adjustment section to form a larger upward swing angle.

[0028] Therefore, the present invention has the following beneficial effects: the size of the jaws can be quickly adjusted, thereby facilitating the clamping and rotation of pipe fittings of different specifications and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the adjusting element being in the engagement position when the first clutch mechanism is adopted in the present invention.

[0030] Figure 2 It is a structural schematic diagram of the adjusting element being in a disengaged position when the first clutch mechanism is adopted in the present invention.

[0031] Figure 3 It is a schematic diagram of another connection structure of the clutch connecting rod and the worm shaft when the first clutch mechanism is adopted in the present invention.

[0032] Figure 4 It is a cross-sectional view of the first clutch mechanism.

[0033] Figure 5 It is a structural schematic diagram of the adjusting element being in the engaged position when the second clutch mechanism is adopted in the present invention.

[0034] Figure 6 It is a structural diagram of a connecting piece.

[0035] In the figure: 1, fixed pliers body 11, gripping portion 12, mounting portion 121, fixed pliers teeth 122, mounting through hole 123, sliding through hole 124, countersunk hole 125, sliding groove 26, accommodating groove 2, movable pliers body 21, adjusting section 211, movable pliers teeth 3, worm 31, worm shaft 4, clutch connecting rod 41, hinge shaft 42, sliding ring sleeve 43, positioning screw 44, torsion spring 45, transition connecting rod 5, clutch handle 51, clutch plate rod 52, connecting plate 53, driving protrusion 6, elastic element 7, connecting plate 71, locking plate 72, spring 73, compression spring 8, rotating handle. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] like Figure 1 , Figure 2 , Figure 4As shown, a quick-adjust pipe clamp comprises a fixed clamp body 1, a movable clamp body 2, and an adjusting element arranged on the fixed clamp body. The fixed clamp body comprises a long strip gripping portion 11, a mounting portion 12 located at the front end of the gripping portion, and a fixed jaw tooth 121 is arranged at the front side of the mounting portion. The movable clamp body comprises a long strip adjustment section 21 arranged on the mounting portion of the fixed clamp body movably forward and backward, and movable jaw teeth 211 are arranged at the front end of the adjustment section opposite to the fixed jaw teeth, so that a jaw for clamping a pipe fitting is formed between the movable jaw teeth and the fixed jaw teeth. The adjusting element is associated with the adjustment section of the movable clamp body, so that the front and rear position of the movable clamp body relative to the fixed clamp body can be adjusted by the adjusting element, thereby adjusting the size of the jaw, and positioning the movable clamp body relative to the fixed clamp body, so that the jaw can be reliably fixed when adjusted to a suitable size, so as to adapt to the clamping of pipe fittings of different sizes and specifications, and avoid the problem of the automatic opening of the jaw of the pipe clamp during use.

[0038] It is understandable that, since the adjusting element is associated with the adjusting section of the movable jaw body, the movement of the movable jaw body is constrained by the adjusting element, that is, the movable jaw body cannot be moved and adjusted independently and directly. When the pipe clamp needs to be frequently switched between pipes of different sizes, adjusting the jaw size by adjusting the adjusting element will result in low work efficiency.

[0039] In order to achieve rapid adjustment of the movable jaw body, we can make the adjusting element rotatably connected or slidably connected to the fixed jaw body, so that the adjusting element has an engagement position engaged with the movable jaw body and a separation position separated from the movable jaw body, and at the same time, a clutch mechanism is set on the fixed jaw body to switch the adjusting element between the engagement position and the separation position. When the clutch mechanism switches the adjusting element to the separation position, the adjusting element is disengaged from the movable jaw body. At this time, the forward and backward movement of the movable jaw body is not constrained by the adjusting element. Therefore, we can directly and quickly move the movable jaw body forward and backward, so that the size of the jaw between the movable jaw teeth and the fixed jaw teeth roughly matches the specifications and dimensions of the pipe fittings, and then the jaws are clamped on the pipe fittings, and the adjusting element is quickly switched from the separation position to the engagement position through the clutch mechanism. At this time, the adjusting element is engaged with the movable jaw body, and we can fine-tune the position of the movable jaw body through the adjusting element, so that the size of the jaw between the movable jaw body and the fixed jaw body accurately matches the pipe fittings. Turning the pipe clamp can drive the pipe fittings to rotate.

[0040] When we need to clamp a pipe with completely different specifications and sizes again, we can first use the clutch mechanism to switch the adjustment element to the separation position, then quickly move the movable clamp body back and forth to make the jaw size roughly match the specifications and sizes of the pipe, then clamp the jaw on the pipe, and use the clutch mechanism to switch the adjustment element to the engagement position, and then fine-tune the front and rear position of the movable clamp body through the adjustment element, so that the jaw size accurately matches the pipe. In other words, the pipe clamp of the present invention has a "coarse adjustment" state for quickly adjusting the jaw size and a "fine adjustment" state for finely adjusting the jaw size, which can not only realize the rapid adjustment of the jaw size, thereby facilitating the improvement of work efficiency, but also realize the fine adjustment of the jaw size, ensuring that the jaw size matches the specifications and sizes of the pipe.

[0041] Preferably, we can set a mounting through hole 122 penetrating the front and rear sides in the middle of the fixed pliers body mounting part, and set a sliding through hole 123 penetrating the front and rear ends in the longitudinal direction in the upper part of the mounting part, the upper side of the mounting through hole is connected to the lower side of the sliding through hole, and the adjustment section of the movable pliers body can be slidably located in the sliding through hole. The adjustment element is a worm 3 arranged in the mounting through hole, the worm shaft 31 of the worm is arranged longitudinally, and the adjustment section of the movable pliers body is provided with a worm tooth meshing with the worm on the lower side. When we clamp and rotate the worm from the front and rear sides of the mounting through hole with our fingers, the movable pliers body can be driven to move forward and backward in the sliding through hole through the cooperation of the worm and the worm tooth, so as to finely adjust the size of the jaws, and realize the self-positioning of the movable pliers body in the front and rear directions, so as to avoid the automatic opening of the jaws when the pipe clamp is used. Of course, the worm should be rotatably sleeved on the worm shaft, and an axial limiting structure such as a shoulder and a retaining ring should be provided on the worm shaft to prevent the worm from moving on the worm shaft, and the sliding through hole should be provided in the longitudinal direction.

[0042] It should be noted that, in this embodiment, the end of the fixed pliers body provided with the fixed pliers teeth is called the front end, the hand-grip end is called the rear end, the direction between the front and rear ends is called the longitudinal direction, and the up and down direction perpendicular to the longitudinal direction is called the transverse direction. In addition, the side of the mounting portion provided with the sliding through hole is called the upper side, the side provided with the mounting through hole is called the lower side, and the two sides of the opening of the mounting through hole of the mounting portion are respectively called the front side and the rear side.

[0043] In order to facilitate processing and assembly, we can set a countersunk hole 124 on the rear side of the fixed pliers body mounting portion, and set a cover 13 fixed with screws in the countersunk hole. In addition, the mounting through hole passes through the cover from front to back, so that the fixed pliers body becomes a spliced ​​structure at the mounting through hole. Of course, the size of the countersunk hole should cover the mounting through hole. In other words, the front side of the worm extends outward from the mounting through hole on the fixed pliers body mounting portion, and the rear side of the worm extends outward from the mounting through hole on the cover, so that it is convenient for the user to clamp and rotate the worm with his fingers. In addition, the mounting through hole is respectively provided with sliding grooves 125 extending in the transverse direction on the front and rear side walls located in the longitudinal direction of the fixed pliers body, and the front and rear ends of the worm shaft are respectively located in the sliding grooves on the corresponding side of the mounting through hole, so as to facilitate the rotation or movement of the worm.

[0044] As a first preferred solution, the clutch mechanism includes a clutch link 4, which is located in the sliding groove on the rear side of the installation through hole, the lower end of the clutch link is a hinged end, and the upper end is a connecting end. The hinged end of the clutch link is provided with a hinge shaft 41 perpendicular to the clutch link, and the two ends of the hinge shaft are rotatably connected to the front and rear side walls of the rear sliding groove, so that the clutch link can rotate in the rear sliding groove. In addition, the front end of the worm shaft is hinged in the sliding groove on the front side of the installation through hole, and the rear end of the worm shaft forms a sliding connection with the connecting end of the clutch link. The worm shaft and the clutch link are connected to form a triangular structure, and a rotating handle 8 is provided at the end of the hinge shaft of the clutch link extending out of the front side of the installation portion.

[0045] When the user turns the rotating handle in the forward direction, the clutch connecting rod can be driven to rotate through the hinge shaft. At this time, the worm shaft that is slidably connected to the clutch connecting rod can rotate, so that the worm and the worm gear are separated and enter the separation position. Of course, at this time, the connection point between the clutch connecting rod and the worm shaft will move and change accordingly. When the user turns the rotating handle in the reverse direction, the worm shaft can be driven to rotate in the reverse direction and switch to the engagement position. At this time, the worm shaft, one end of which is hinged to the fixed pliers body, can prevent the worm from moving in the longitudinal direction of the front and back.

[0046] Furthermore, a rotatable sliding ring sleeve 42 is provided at the connecting end of the clutch connecting rod, and the rear end of the worm shaft is inserted into the sliding ring sleeve. Thus, when we turn the rotating handle forward, the worm shaft can be pulled downward by the sliding ring sleeve; when we turn the rotating handle backward, the worm shaft can be pushed by the end of the clutch connecting rod to make the worm shaft swing upward.

[0047] Of course, if Figure 3 As shown, the rear end of the worm shaft and the connecting end of the clutch connecting rod can also be connected to form a connecting rod structure through a transition connecting rod 45, and oblong connecting holes are provided on the clutch connecting rod and the worm shaft so that the two ends of the transition connecting rod can move relative to the clutch connecting rod and the worm shaft. When the user turns the rotating handle, the clutch connecting rod can be driven to rotate through the hinge shaft, and then the worm shaft can be driven to swing through the transition connecting rod.

[0048] Preferably, when the worm is in the engagement position with the worm teeth of the movable caliper adjustment section, the angle between the clutch link and the worm shaft can be controlled between 80 degrees and 100 degrees, so that the clutch link can provide reliable support for the worm shaft and form a self-locking between the clutch link and the worm shaft, thereby preventing the worm from disengaging from the movable caliper body.

[0049] In addition, a radial screw hole is provided at the end of the articulated shaft extending out of the fixed pliers body mounting portion, a sleeve hole is provided on the rotating handle and sleeved on the articulated shaft, a positioning hole passing through the sleeve hole is provided on the side of the rotating handle corresponding to the position of the radial screw hole, a positioning screw 43 is provided in the positioning hole, and the inner end of the positioning screw is threadedly connected in the radial screw hole, thereby playing a role similar to a pin, so that the rotating handle can transmit torque to the articulated shaft.

[0050] Of course, we can also set a torsion spring 44 on the hinge shaft, one end of the torsion spring is pinned to the mounting portion, and the other end is pinned to the clutch connecting rod. The torsion spring can drive the clutch connecting rod to rotate, so that the worm is automatically positioned in the engagement position, which is convenient for the operation of the pipe clamp.

[0051] As a second preferred solution, Figure 5 As shown, the two ends of the worm shaft are respectively slidably connected in the sliding grooves on the front and rear sides of the mounting through hole of the mounting portion, and the clutch mechanism includes a clutch handle 5 arranged longitudinally on the upper side of the mounting portion, and an elastic element 6 arranged on the fixed pliers body to elastically position the worm in the engagement position, the front end of the clutch handle is hinged on the mounting portion, and the middle part of the clutch handle partially extends downward to form a driving protrusion 53 against the upper side of the worm.

[0052] When the user needs to quickly adjust the size of the jaws, the clutch handle can be pushed downward, and the driving protrusion in the middle of the clutch handle can push the worm to overcome the elastic force of the elastic element and move downward. At this time, the worm is disengaged from the worm teeth of the adjustment section, and the worm switches from the engagement position to the separation position. The user can quickly move the adjustment section to adjust the size of the jaws. When the user releases the clutch handle, the elastic force of the elastic element drives the worm to translate upward and reset to the engagement position, thereby realizing automatic resetting of the worm, which is convenient for operation.

[0053] Preferably, the clutch handle includes a clutch plate rod 51 respectively abutting against the front and rear sides of the fixed caliper body mounting portion, the front end of the clutch plate rod is hinged on the mounting portion, the upper sides of the rear ends of the two clutch plate rods are connected as a whole through a connecting plate 52, and the driving protrusion is a semicircular piece integrally arranged on the lower side of the clutch plate rod, so that the clutch handle can be efficiently manufactured through a sheet metal stamping process. When we turn the clutch handle downward, the semicircular driving protrusion can always maintain point contact with the worm, which is conducive to reducing the friction between the two. Of course, we should make the clutch handle have a sufficient length to ensure that the connecting piece at the rear end of the clutch plate rod is located behind the adjustment section to avoid interference with the movable caliper body when the clutch handle is turned downward.

[0054] In addition, the elastic element includes two front and rear return springs, which are respectively located in the sliding grooves on the front and rear sides of the mounting through hole. The lower end of the return spring presses against the side wall of the sliding groove, and the upper end of the return spring presses against the lower side of the worm shaft, thereby ensuring that the force at the front and rear ends of the worm shaft is balanced, so that the worm can move up and down smoothly and avoid tilting when it moves.

[0055] Finally, if Figure 1 , Figure 2 , Figure 4 , Figure 6 As shown, we can also set accommodating grooves 126 on the upper and lower sides of the sliding through hole, set a connecting piece 7 between the rear side of the adjustment section and the sliding through hole, and the upper and lower edges of the connecting piece are bent forward to form a locking piece 71 that abuts against the adjustment section. The locking pieces on the upper and lower sides are respectively located in the accommodating grooves on the corresponding side, and a rectangular punching is set on the lower locking piece. The width edge of one side of the rectangular punching extends outward in an integral manner to form a spring piece 72 that presses against the bottom wall of the accommodating groove, and a compression spring 73 is set in the upper accommodating groove to press against the upper locking piece. The spring piece connected to the locking piece forms a cantilever beam structure, and when the suspended end of the spring piece is compressed and bent, a corresponding elastic force can be generated. It can be understood that, compared with the existing compression spring, the spring piece can minimize the size of the accommodating groove, thereby reducing the outer dimensions of the upper and lower width directions of the mounting portion, and the spring piece can be made integrally with the connecting piece and the locking piece through a stamping process, thereby simplifying the manufacturing process and facilitating assembly. The compression spring exerts a force on the front end of the connecting section to swing downward, while the spring sheet exerts a force on the front end of the connecting section to swing upward. The elastic force of the compression spring and the spring sheet elastically positions the adjustment section in the middle of the sliding through hole, thereby forming a gap between the adjustment section and the upper and lower sides of the sliding through hole. When we clamp the jaws of the pipe clamp onto the pipe fitting, the movable jaw body will swing upward at an angle. At this time, the compression spring causes the jaws of the movable jaw body and the fixed jaw body to exert a pre-tightened clamping force on the pipe fitting, thereby effectively preventing the jaws from slipping against the pipe fitting when the pipe clamp is rotated.

Claims

1. A quick-adjust pipe clamp, comprising a fixed clamp body and a movable clamp body that can move forward and backward relative to the fixed clamp body, and an adjusting element for adjusting the position of the movable clamp body is provided on the fixed clamp body, wherein: The adjusting element is movably connected to the fixed caliper body, so that the adjusting element has an engagement position engaged with the movable caliper body and a separation position separated from the movable caliper body. A clutch mechanism that enables the adjusting element to switch between the engagement position and the separation position is provided on the fixed caliper body. A mounting through hole penetrating the front and rear sides is provided on the fixed caliper body. The adjusting element is a worm that is longitudinally located in the mounting through hole and has a worm shaft. The clutch mechanism includes a clutch connecting rod with a hinged end and a connecting end. The hinged end of the clutch connecting rod is provided with a hinged shaft hinged to the fixed caliper body. One end of the worm shaft is hinged to the fixed caliper body, and the other end of the worm shaft forms a sliding connection with the connecting end of the clutch connecting rod; or the clutch mechanism includes a clutch handle with one end hinged to the fixed caliper body, an elastic element arranged on the fixed caliper body to elastically position the worm in the engagement position, and both ends of the worm shaft are respectively slidably connected to the fixed caliper body.

2. A quick-adjust pipe clamp according to claim 1, characterized in that: The fixed pliers body is provided with a sliding through hole which runs through the front and rear ends in the longitudinal direction, the mounting through hole is connected with the sliding through hole, the movable pliers body includes an adjusting section which is movably arranged in the sliding through hole, and the adjusting section is provided with worm teeth which mesh with the worm near the lower side of the adjusting element.

3. A quick-adjust pipe wrench according to claim 2, characterized in that: A countersunk hole is provided on the rear side of the fixed pliers body, a cover is provided in the countersunk hole, the mounting through hole passes through the cover, and the mounting through hole is located on the front and rear side walls in the longitudinal direction of the fixed pliers body, and sliding grooves extending in the transverse direction are respectively provided. The front and rear ends of the worm shaft are respectively located in the sliding grooves on the corresponding side of the mounting through hole.

4. A quick-adjust pipe wrench according to claim 2, characterized in that: A rotating handle is arranged on the hinge shaft of the clutch connecting rod.

5. A quick-adjust pipe clamp according to claim 4, characterized in that: The connecting end of the clutch connecting rod is provided with a sliding ring sleeve which is movably sleeved on the worm shaft. When the worm is in the engaged position, the angle between the clutch connecting rod and the worm shaft is between 80 degrees and 100 degrees.

6. A quick-adjust pipe wrench according to claim 4, characterized in that: A radial screw hole is provided at the end of the articulated shaft extending out of the fixed pliers body, and a sleeve hole is provided on the rotating handle which is sleeved on the articulated shaft. A positioning hole which passes through the sleeve hole is provided on the side of the rotating handle corresponding to the position of the radial screw hole, and a positioning screw is provided in the positioning hole, and the inner end of the positioning screw is threadedly connected to the radial screw hole.

7. A quick-adjust pipe wrench according to claim 2, characterized in that: A driving protrusion is arranged in the middle of the clutch handle and abuts against one side of the worm gear close to the movable pliers body.

8. A quick-adjust pipe wrench according to claim 7, characterized in that: The clutch handle includes clutch levers respectively arranged on the front and rear sides of the fixed caliper body, the front end of the clutch lever is hinged on the fixed caliper body, the rear end of the clutch lever is connected to the fixed caliper body through a connecting plate, and the driving protrusion is a semicircular plate integrally arranged on the lower side of the clutch lever.

9. A quick-adjust pipe wrench according to claim 7, characterized in that: The elastic element comprises two front and rear return springs, and the return springs respectively press against the lower side of the worm shaft at one end.

10. The quick-adjust pipe wrench according to claim 2, characterized in that: Accommodating grooves are respectively provided on the upper and lower sides of the sliding through hole, a connecting piece is provided between the rear side of the adjusting section and the sliding through hole, the upper and lower side edges of the connecting piece are bent forward to form a locking piece abutting the adjusting section, the upper and lower locking pieces are respectively located in the accommodating grooves on the corresponding side, a rectangular punching hole is provided on the lower locking piece, the width edge of one side of the rectangular punching hole is integrally extended outwardly to form a spring piece that presses against the bottom wall of the accommodating groove, and a compression spring is provided in the upper accommodating groove to press against the upper locking piece.

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