Confluence clamp

Abstract

The invention discloses a confluence clamp, which relates to the field of electric power tools, and comprises a handle, a clamp body and a clamping device, the driving motor is provided with an output shaft; one end of the transmission rod is in transmission connection with an output shaft of the driving motor so as to drive the transmission rod to rotate around the axis of the transmission rod; the transmission sleeve is arranged on the transmission rod in a sleeving manner; the fixed chuck is arranged at the front end of the handle; one end of the movable chuck is fixedly connected with the transmission sleeve, and the other end of the movable chuck is arranged opposite to the fixed chuck to form a jaw; the anti-rotation guide mechanism is arranged in the containing cavity, and the anti-rotation guide mechanism is connected with the transmission sleeve to limit circumferential rotation of the transmission sleeve; when the transmission rod rotates, the transmission sleeve does linear motion along the axis of the transmission rod and drives the movable chuck to do synchronous linear motion so as to change the opening degree of the jaw. The clamping device has the advantages of being high in clamping efficiency and convenient to operate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric power tools, in particular to a busbar clamp. BACKGROUND

[0002] The busbar clamp is a key interface component for connecting the mobile power supply such as box transformer car and power generation car with user load in the distribution network non-stop operation, which realizes the fast busbar connection and disconnection of large current without stopping the power supply of users.

[0003] At present, most of the busbar clamps on the market adopt manual adjustment mode. The operator usually needs to rotate the handle or pull the lever to drive the clamp head to open and close, so as to realize the clamping and loosening of the cable or busbar, that is, relying on the torque exerted by the operator to complete the clamping action.

[0004] However, such manually operated busbar clamps have obvious technical defects in actual use: the clamping efficiency is low, which cannot meet the demand of fast response and frequent operation of distribution network non-stop operation. Especially in the emergency working condition of quickly connecting emergency power supply or carrying out load transfer, the time-consuming process of manually tightening or loosening the clamp seriously affects the timeliness of power supply recovery, which becomes the main bottleneck restricting the improvement of operation efficiency. SUMMARY

[0005] The present application aims to solve one of the problems in the related art to some extent. To this end, the present application provides a busbar clamp, which has the advantages of high clamping efficiency and convenient operation.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme: A busbar clamp, comprising: a handle, which is internally provided with an accommodating cavity; a drive motor, which has an output shaft; a transmission rod, one end of which is in transmission connection with the output shaft of the drive motor to drive the transmission rod to rotate around its own axis; a transmission sleeve, which is sleeved on the transmission rod; a fixed clamp head, which is arranged at the front end of the handle; a movable clamp head, one end of which is fixedly connected with the transmission sleeve, and the other end is arranged opposite to the fixed clamp head to form a jaw; an anti-rotation guide mechanism, which is arranged in the accommodating cavity, and the anti-rotation guide mechanism is connected with the transmission sleeve to limit the circumferential rotation of the transmission sleeve; when the transmission rod rotates, the transmission sleeve moves linearly along the axis of the transmission rod and drives the movable clamp head to move linearly synchronously, so as to change the opening degree of the jaw.

[0007] In the present application, the external shape of the handle is suitable for holding by a human hand, so as to facilitate the user to operate; the accommodating cavity arranged inside the handle constitutes a relatively closed space for installing and protecting the internal transmission related components. The fixed chuck is rigidly installed at the front end of the handle, and the position of the fixed chuck is fixed to serve as a clamping reference. The movable chuck is arranged opposite to the fixed chuck, and the two together constitute an adjustable jaw. The movement of the movable chuck is driven by the transmission sleeve, and the two are fixedly connected. The driving motor serves as a power source, and its output shaft is connected with the transmission rod. The transmission sleeve is sleeved on the transmission rod, and the anti-rotation guide mechanism is arranged in the accommodating cavity and forms a movement constraint relationship with the transmission sleeve to prevent the transmission sleeve from rotating. After the driving motor is started, the output torque of the driving motor drives the transmission rod to rotate. Since the transmission sleeve is limited in the freedom of circumferential rotation by the anti-rotation guide mechanism, when the transmission rod rotates, the transmission sleeve cannot rotate with it, but can only produce linear motion along the axis of the transmission rod under the constraint. The linearly moving transmission sleeve in turn pushes or pulls the movable chuck associated with it. Since the movable chuck is fixedly connected with the transmission rod, this makes the movable chuck follow the transmission sleeve to perform synchronous linear motion, so that it approaches or moves away from the fixed chuck, thereby realizing the adjustment of the opening and closing degree of the jaw. The bus bar clamp provided in the present application replaces the manual tightening in the prior art with electric driving, improves the speed of clamping and loosening, saves labor in operation, and is suitable for occasions requiring frequent operation. In addition, the opening and closing degree of the jaw can be electrically adjusted, which can quickly adapt to busbars or cables of different thicknesses and sizes, and improves the versatility of the tool.

[0008] Optionally, the anti-rotation guide mechanism comprises at least one guide frame, the guide frame comprises two vertical rods and a cross rod connected between the two vertical rods, the extension direction of the cross rod is parallel to the axis of the transmission rod; the top ends of the two vertical rods are fixedly connected to the cavity wall of the accommodating cavity, and the transmission sleeve is sleeved on the cross rod and can slide thereon.

[0009] The guide frame is composed of a horizontal rod and two vertical rods. The top ends of the two vertical rods are fixedly connected to the top of the cavity wall of the accommodating cavity by means of screwing or welding, so that the whole guide frame is suspended and fixed inside the accommodating cavity. The extension direction of the horizontal rod is arranged in parallel with the axis of the transmission rod. The transmission sleeve is provided with corresponding holes, so that it can be arranged on the horizontal rod, i.e. the horizontal rod passes through the holes of the transmission sleeve, and the two form a sliding fit. It should be noted that, in order to facilitate installation, the horizontal rod and the two vertical rods are detachably connected. When the transmission rod rotates and drives the transmission sleeve, the transmission sleeve will have a tendency to rotate. However, since the transmission sleeve is arranged on the horizontal rod, the horizontal rod acts as a rigid track to prevent the transmission sleeve from rotating around the axis of the transmission rod (i.e. circumferential rotation). The transmission sleeve is limited to only sliding along the horizontal rod, which is parallel to the axis of the transmission rod, so as to convert the rotary motion of the transmission rod into linear motion of the transmission sleeve. The frame structure of the guide frame provides stable support for the transmission sleeve to resist lateral forces generated during clamping, ensuring that the transmission sleeve always moves in a straight line and is not prone to shaking. In addition, the guide frame is composed of rod members, which has simple machining process, low cost and convenient assembly.

[0010] Optionally, the guide frame is configured as two and symmetrically arranged on both sides of the transmission rod.

[0011] The number of guide frames is set to two. The two guide frames have the same structure and size and are symmetrically arranged on both sides of the transmission rod with the axis of the transmission rod as the center of symmetry. The horizontal rods of each guide frame are parallel to the axis of the transmission rod, and the two horizontal rods are at the same horizontal height. The transmission sleeve is provided with two holes on both sides, which are arranged on the two horizontal rods respectively. The two symmetrically arranged guide frames jointly constitute a stable motion plane. When the transmission sleeve moves under force, the two horizontal rods simultaneously bear the load and symmetrically constrain the transmission sleeve, which can better limit the circumferential rotation of the transmission sleeve and prevent the transmission sleeve from tilting or jamming during movement. The two symmetrically arranged guide frames make the force on the transmission sleeve uniform and the motion trajectory more stable.

[0012] Optionally, the transmission sleeve is provided with a mounting hole, and a self-lubricating bushing is fixedly installed in the mounting hole.

[0013] A mounting hole is formed in the transmission sleeve, and a self-lubricating bushing is fixedly installed in the mounting hole. The horizontal rod passes through the inner ring of the self-lubricating bushing. The bushing is made of rubber and contains solid lubricant inside. The outer wall of the bushing is in interference fit with the mounting hole of the transmission sleeve, and the inner hole of the bushing forms a sliding fit with the horizontal rod, and the gap between them is controlled within the range of 0.05-0.1mm. During work, the solid lubricant inside the self-lubricating bushing converts the direct friction between metals into friction between metal and lubricating film, so that the transmission sleeve and the horizontal rod can work stably for a long time without oil lubrication.

[0014] Optionally, the anti-rotation guiding mechanism comprises a key groove and a flat key matched with the key groove, one of which is arranged on the cavity wall of the accommodating cavity and the other is arranged on the outer surface of the transmission sleeve.

[0015] The anti-rotation guiding mechanism is based on a key connection, which comprises a key groove and a flat key. The key groove is a long strip-shaped groove, and the flat key is a rectangular key matched with the key groove. One of the key groove and the flat key is arranged on the cavity wall of the accommodating cavity, and the other is correspondingly arranged on the outer surface of the transmission sleeve. After the flat key is embedded in the key groove, the two are in close lateral fit. When the transmission rod rotates and drives the transmission sleeve, the transmission sleeve has a tendency to rotate, but the side of the flat key will immediately contact the side wall of the key groove. Since the key groove is fixed on the accommodating cavity, the flat key cannot pass the side wall of the key groove, thereby preventing the circumferential rotation of the transmission sleeve. The transmission sleeve is limited to only slide along the length direction of the flat key and the key groove (i.e. the direction parallel to the axis of the transmission rod). The contact area of the key connection is relatively large, which can withstand a large circumferential force and impact load, and has high reliability.

[0016] Optionally, the key groove is opened at the top of the cavity wall of the accommodating cavity, and the top of the transmission sleeve is provided with a flat key matched with the key groove, which is embedded in the key groove and can slide along it.

[0017] The anti-rotation guiding mechanism adopts an up-down layout, and the key groove is machined on the top of the cavity wall of the accommodating cavity as a fixed guiding track. The flat key matched with it is arranged on the top of the transmission sleeve. The size of the flat key is accurately calculated so that it can be embedded in the key groove on the top while leaving a proper gap to ensure that it can slide along the key groove, so that the transmission sleeve is constrained on the track of the key groove on the top of the cavity wall through the flat key on the top of the transmission sleeve.

[0018] Optionally, the key groove is opened at the top of the cavity wall of the accommodating cavity, and the top of the transmission sleeve is provided with a flat key matched with the key groove, which is embedded in the key groove and can slide along it.

[0019] The key groove is opened at the top of the transmission sleeve as a movable guiding track. The flat key matched with it is formed on the cavity wall of the accommodating cavity and protrudes from the surface of the cavity wall. The protruding part of the flat key is embedded in the key groove on the top of the transmission sleeve to form a sliding fit. So that the transmission sleeve is constrained by the flat key in the accommodating cavity through its own key groove. When the transmission rod rotates and drives the transmission sleeve, the key groove on the top of the transmission sleeve slides relative to the fixed flat key. The two side walls of the flat key limit the rotation tendency of the key groove (and the entire transmission sleeve) in the horizontal plane, forcing its movement trajectory to be limited to a straight line direction parallel to the axis of the transmission rod.

[0020] Optionally, the output shaft of the driving motor is coaxially connected with one end of the transmission rod through a coupling, and the coupling is a flexible coupling.

[0021] The output shaft of the driving motor is coaxially connected with one end of the transmission rod through a coupling. Specifically, the coupling is a flexible coupling, such as a common plum blossom coupling, a diaphragm coupling or an elastic sleeve pin coupling. The two ends of the coupling are respectively fastened to the output shaft of the motor and the end of the transmission rod through keys, set screws or clamping, to ensure the transmission of torque. The flexible coupling can absorb the radial, angular and axial deviations between the motor and the transmission rod, reducing the requirement for installation accuracy and simplifying the assembly process.

[0022] Optionally, the transmission rod is at least partially provided with external threads, and the transmission sleeve is provided with a threaded hole penetrating the middle part. The transmission rod is connected with the transmission sleeve through the cooperation of the external threads and the threaded hole.

[0023] At least one section of the rod body of the transmission rod is processed with external threads. Correspondingly, a threaded hole penetrating the block is provided in the middle part of the transmission sleeve. The size, tooth type and pitch of the threaded hole are matched with the external threads on the transmission rod. The transmission rod passes through the threaded hole in the middle part of the transmission sleeve, and the two are connected through a threaded pair, i.e., the external threads and the internal threads are engaged with each other. When the driving motor drives the transmission rod to rotate, the transmission sleeve cannot rotate with the transmission rod due to the restriction of the anti-rotation guide mechanism, and the relative movement occurs between the internal threads on the transmission sleeve and the rotating external threads, i.e., the transmission sleeve moves linearly along the axial direction of the transmission rod. In addition, the connection mode of the threaded pair can also prevent the movable chuck from retracting towards the handle.

[0024] Optionally, the opposite surfaces of the fixed chuck and the movable chuck are respectively provided with intermeshing serrated clamping surfaces.

[0025] The opposite surfaces of the fixed chuck and the movable chuck, i.e., the contact surfaces of the two relative to each other and forming the jaw, are processed with serrated structures. The serrations on the two chucks are intermeshed to increase the roughness and mechanical interlocking action of the contact surface with the busbar when the jaw clamps the busbar.

[0026] These features and advantages of the present application will be disclosed in detail in the following specific embodiments and drawings. The best mode or means of the present application will be fully illustrated in combination with the drawings, but it is not a limitation on the technical solutions of the present application. In addition, these features, elements and components appearing in each of the following text and drawings are multiple, and different symbols or numbers are marked for convenience of representation, but all represent the same or similar structures or functions of the components. BRIEF DESCRIPTION OF DRAWINGS

[0027] The present application will be further described below in combination with the drawings. Figure 1 This is a schematic diagram of the bus clamp structure in Embodiment 1 of the present invention; Figure 2 for Figure 1 A sectional view; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the bus clamp structure in Example 2; Figure 5 This is a schematic diagram of another structure of the bus clamp in Example 2.

[0028] Among them, 1. Handle; 11. Receiving cavity; 2. Drive motor; 3. Transmission rod; 4. Transmission sleeve; 41. Mounting hole; 5. Fixed chuck; 6. Movable chuck; 7. Anti-rotation guide mechanism; 71. Guide frame; 711. Vertical rod; 712. Horizontal rod; 72. Keyway; 73. Flat key; 8. Coupling; 9. Bearing. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain the present invention and should not be construed as limiting the invention.

[0030] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this patent. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0031] Example 1: like Figures 1 to 3 As shown, this embodiment provides a manifold clamp, including: a handle 1 with a receiving cavity 11 inside; a drive motor 2 with an output shaft; a transmission rod 3, one end of which is connected to the output shaft of the drive motor 2 to drive the transmission rod 3 to rotate around its own axis; a transmission sleeve 4, which is sleeved on the transmission rod 3; a fixed chuck 5, which is disposed at the front end of the handle 1; a movable chuck 6, one end of which is fixedly connected to the transmission sleeve 4, and the other end is disposed opposite to the fixed chuck 5 to form a jaw; and an anti-rotation guide mechanism 7, which is disposed in the receiving cavity 11 and is connected to the transmission sleeve 4 to restrict the circumferential rotation of the transmission sleeve 4; when the transmission rod 3 rotates, the transmission sleeve 4 moves linearly along the axis of the transmission rod 3 and drives the movable chuck 6 to move linearly in sync, thereby changing the opening degree of the jaw.

[0032] In the embodiment, the outer shape of the handle 1 is suitable for holding by a human hand, so as to facilitate the user to operate; the accommodating cavity 11 arranged inside the handle 1 constitutes a relatively closed space for installing and protecting the internal transmission related components. The fixed chuck 5 is rigidly installed at the front end of the handle 1, and the fixed chuck 5 is fixed in position to serve as a clamping reference. The movable chuck 6 is arranged opposite to the fixed chuck 5, and the two together constitute an adjustable jaw. The movement of the movable chuck 6 is driven by the transmission sleeve 4. The driving motor 2 serves as a power source, and its output shaft is connected with the transmission rod 3. The transmission sleeve 4 is sleeved on the transmission rod 3, and the anti-rotation guide mechanism 7 is arranged in the accommodating cavity 11 and forms a movement constraint relationship with the transmission sleeve 4 to prevent the transmission sleeve 4 from rotating. After the driving motor 2 is started, the output torque thereof drives the transmission rod 3 to rotate. Since the transmission sleeve 4 is limited in the freedom of circumferential rotation by the anti-rotation guide mechanism 7, when the transmission rod 3 rotates, the transmission sleeve 4 cannot rotate with it and can only produce linear movement along the axis direction of the transmission rod 3 under the constraint. The linearly moving transmission sleeve 4 in turn pushes or pulls the movable chuck 6 associated therewith. Since the movable chuck 6 is fixedly connected with the transmission rod 3, this makes the movable chuck 6 follow the transmission sleeve 4 to perform synchronous linear movement, so that it approaches or moves away from the fixed chuck 5, thereby realizing the adjustment of the opening and closing degree of the jaw. The bus bar clamp provided in the application replaces the manual tightening in the prior art with electric driving, improves the speed of clamping and loosening, saves labor in operation, and is suitable for occasions requiring frequent operation. In addition, the opening and closing degree of the jaw can be electrically adjusted, which can quickly adapt to bus bars or cables of different thicknesses and sizes, and improves the universality of the tool.

[0033] It should be noted that the handle 1 is also provided with a bearing 9 for supporting the transmission rod 3 to prevent the transmission rod 3 from being unable to stably transmit. The driving motor 2 drives the transmission rod 3 to rotate counterclockwise or clockwise by forward rotation and reverse rotation, so as to make the transmission sleeve 4 move forward or backward, which will not be described herein again. The end of the handle 1 is also provided with a clearance hole allowing the front end of the transmission sleeve 4 to pass out.

[0034] The anti-rotation guide mechanism 7 includes at least one guide frame 71, the guide frame 71 including two vertical rods 711 and a cross rod 712 connected between the two vertical rods 711, the extension direction of the cross rod 712 being parallel to the axis of the transmission rod 3; the top ends of the two vertical rods 711 are fixedly connected to the cavity wall of the accommodating cavity 11, and the transmission sleeve 4 is sleeved on the cross rod 712 and can slide thereon.

[0035] In the embodiment, the guide frame 71 is composed of a horizontal rod 712 and two vertical rods 711 to form a stable frame. The top ends of the two vertical rods 711 are fixedly connected to the top of the cavity wall of the accommodating cavity 11 by screws or welding, so that the entire guide frame 71 is suspended and fixed inside the accommodating cavity 11. The extension direction of the horizontal rod 712 is arranged in parallel with the axis of the transmission rod 3. The transmission sleeve 4 is processed with corresponding holes, so that it can be arranged on the horizontal rod 712, that is, the horizontal rod 712 passes through the holes of the transmission sleeve 4 to form a sliding fit therebetween. It should be noted that, in order to facilitate installation, the horizontal rod 712 and the two vertical rods 711 are detachably connected. When the transmission rod 3 rotates and drives the transmission sleeve 4, the transmission sleeve 4 will have a tendency to rotate. However, since the transmission sleeve 4 is arranged on the horizontal rod 712, the horizontal rod 712 acts as a rigid track to prevent the transmission sleeve 4 from rotating (i.e., circumferentially rotating) around the axis of the transmission rod 3. The transmission sleeve 4 is limited to only slide along the horizontal rod 712 which is in parallel with the axis of the transmission rod 3, so as to convert the rotary motion of the transmission rod 3 into the linear motion of the transmission sleeve 4. The frame structure of the guide frame 71 provides stable support for the transmission sleeve 4 to resist the lateral force generated during clamping, so as to ensure that the transmission sleeve 4 always moves in a straight line and is not easy to shake. In addition, the guide frame 71 is composed of rod members, which has simple machining process, low cost and convenient assembly.

[0036] The guide frame 71 is arranged in two and symmetrically arranged on both sides of the transmission rod 3.

[0037] In the embodiment, the number of guide frames 71 is set to two. The two guide frames 71 have the same structure and size, and are symmetrically arranged on both sides of the transmission rod 3 with the axis of the transmission rod 3 as the center of symmetry. The horizontal rod 712 of each guide frame 71 is parallel to the axis of the transmission rod 3, and the two horizontal rods 712 are at the same horizontal height. The transmission sleeve 4 is correspondingly provided with two holes on both sides, which are arranged on the two horizontal rods 712, respectively. The two symmetrically arranged guide frames 71 jointly form a stable movement plane. When the transmission sleeve 4 moves under force, the two horizontal rods 712 simultaneously bear the load and symmetrically constrain the transmission sleeve 4, which can better limit the circumferential rotation of the transmission sleeve 4 and prevent the transmission sleeve 4 from tilting or jamming during movement. The two symmetrically arranged guide frames 71 make the force on the transmission sleeve 4 uniform, and the movement trajectory more stable.

[0038] The transmission sleeve 4 is provided with a mounting hole 41, and a self-lubricating bushing is fixedly installed in the mounting hole 41.

[0039] In the embodiment, a mounting hole 41 is formed on the transmission sleeve 4, and a self-lubricating bushing is fixedly installed in the mounting hole 41. The cross rod 712 passes through the inner ring of the self-lubricating bushing. The self-lubricating bushing is made of rubber and contains solid lubricant inside. The outer wall of the self-lubricating bushing is in interference fit with the mounting hole 41 of the transmission sleeve 4, and the inner hole of the self-lubricating bushing is in sliding fit with the cross rod 712. The gap between the two is controlled within the range of 0.05-0.1 mm. During operation, the solid lubricant inside the self-lubricating bushing converts the direct friction between metals into the friction between the metal and the lubricating film, so that the transmission sleeve 4 and the cross rod 712 can work stably for a long time without oil lubrication.

[0040] The output shaft of the driving motor 2 is coaxially connected with one end of the transmission rod 3 through a coupling 8. The coupling 8 is a flexible coupling 8.

[0041] In the embodiment, the output shaft of the driving motor 2 is coaxially connected with one end of the transmission rod 3 through a coupling 8. Specifically, the coupling 8 is a flexible coupling 8, such as a common plum blossom coupling 8, a diaphragm coupling 8 or an elastic sleeve column pin coupling 8. The two ends of the coupling 8 are respectively fastened to the motor output shaft and the end of the transmission rod 3 through keying, clamping screw or clamping to ensure the transmission of torque. The flexible coupling 8 can absorb the radial, angular and axial deviation between the motor and the transmission rod 3, reduce the requirement for installation accuracy and simplify the assembly process.

[0042] The transmission rod 3 is at least partially provided with external threads, and the middle part of the transmission sleeve 4 is provided with a threaded hole penetrating the block. The transmission rod 3 is connected with the transmission sleeve 4 through the cooperation of the external threads and the threaded hole.

[0043] In the embodiment, at least one section of the rod body of the transmission rod 3 is processed with external threads. Correspondingly, a threaded hole penetrating the block is arranged in the middle part of the transmission sleeve 4. The size, tooth type and pitch of the threaded hole are matched with the external threads on the transmission rod 3. The transmission rod 3 passes through the threaded hole in the middle part of the transmission sleeve 4, and the two are connected through a threaded pair, i.e. the external threads and the internal threads are engaged with each other. When the driving motor 2 drives the transmission rod 3 to rotate, the transmission sleeve 4 cannot rotate with the transmission rod 3 due to the restriction of the anti-rotation guide mechanism 7, and the relative movement between the internal threads on the transmission sleeve 4 and the rotating external threads occurs, i.e. the transmission sleeve 4 moves linearly along the axial direction of the transmission rod 3. In addition, the threaded pair connection can also prevent the movable chuck 6 from retracting towards the handle 1.

[0044] The opposite surfaces of the fixed chuck 5 and the movable chuck 6 are respectively provided with intermeshing serrated clamping surfaces.

[0045] In this embodiment, the opposing surfaces of the fixed jaw 5 and the movable jaw 6, i.e. the contact surfaces of the two jaws that are opposite to each other and form the nip, are both provided with a sawtooth structure. The sawteeth on the two jaws are intermeshed to increase the roughness and mechanical interlocking effect of the contact surface with the busbar when the busbar is clamped by the nip.

[0046] Embodiment 2 This embodiment provides a busbar clamp, which is different from the embodiment 1 in that the anti-rotation guide mechanism 7 comprises a key groove 72 and a flat key 73 that cooperates with the key groove 72, one of which is provided on the cavity wall of the accommodating cavity 11 and the other is provided on the outer surface of the transmission sleeve 4.

[0047] In this embodiment, the anti-rotation guide mechanism 7 is based on a key connection, which comprises a key groove 72 and a flat key 73. The key groove 72 is a long strip-shaped groove, and the flat key 73 is a rectangular key that cooperates with the key groove 72. One of the key groove 72 and the flat key 73 is provided on the cavity wall of the accommodating cavity 11, and the other is correspondingly provided on the outer surface of the transmission sleeve 4. After the flat key 73 is inserted into the key groove 72, the two are in close lateral fit. When the transmission rod 3 rotates and drives the transmission sleeve 4, the transmission sleeve 4 has a tendency to rotate, but the side surface of the flat key 73 will immediately come into contact with the side wall of the key groove 72. Since the key groove 72 is fixed on the accommodating cavity 11, the flat key 73 cannot pass the side wall of the key groove 72, thereby preventing the circumferential rotation of the transmission sleeve 4. The transmission sleeve 4 is limited to only slide along the length direction of the flat key 73 and the key groove 72 (i.e. the direction parallel to the axis of the transmission rod 3). The contact area of the key connection is relatively large, which can withstand a larger circumferential force and impact load, and has high reliability.

[0048] As an embodiment, as shown in Figure 4 The key groove 72 is provided on the top of the cavity wall of the accommodating cavity 11, and the flat key 73 that cooperates with the key groove 72 is provided on the top of the transmission sleeve 4, which is inserted into the key groove 72 and can slide along it.

[0049] The anti-rotation guide mechanism 7 adopts an upper and lower layout, and the key groove 72 is processed on the top of the cavity wall of the accommodating cavity 11 as a fixed guide rail. The flat key 73 that cooperates with it is provided on the top of the transmission sleeve 4. The size of the flat key 73 is accurately calculated so that it can be inserted into the key groove 72 on the top while leaving a proper gap to ensure that it can slide along the key groove 72, so that the transmission sleeve 4 is constrained on the rail of the key groove 72 on the top of the cavity wall through the flat key 73 on the top of the transmission sleeve 4. Of course, the key groove 72 can also be provided on the bottom of the cavity wall of the accommodating cavity 11, and the flat key 73 can also be provided on the bottom of the transmission sleeve 4.

[0050] As another embodiment, the key groove 72 is provided on the top of the transmission sleeve 4, and the flat key 73 that protrudes from the cavity wall of the accommodating cavity 11 is provided on the top of the transmission sleeve 4, which is inserted into the key groove 72 and can slide along it.

[0051] like Figure 5 As shown, a keyway 72 is formed on the top of the transmission sleeve 4, serving as a guide rail for movement. A mating flat key 73 is formed on the cavity wall of the receiving cavity 11, protruding from the cavity wall surface. The protruding portion of the flat key 73 is embedded in the keyway 72 on the top of the transmission sleeve 4, forming a sliding fit. This allows the transmission sleeve 4 to be constrained by the flat key 73 within the receiving cavity 11 via its own keyway 72. When the transmission rod 3 rotates to drive the transmission sleeve 4, the keyway 72 on the top of the transmission sleeve 4 slides relative to the fixed flat key 73. The two side walls of the flat key 73 restrict the rotational tendency of the keyway 72 (and thus the entire transmission sleeve 4) in the horizontal plane, forcing its movement trajectory to be limited to a straight line parallel to the axis of the transmission rod 3. Alternatively, the keyway 72 can also be located at the bottom of the transmission sleeve 4, and the flat key 73 can also be located at the bottom of the cavity wall of the receiving cavity 11.

[0052] It should be noted that the width of the keyway 72 and the flat key 73 should be the same to ensure that the flat key 73 cannot rotate after being inserted.

[0053] The other components in this embodiment are basically the same as those in Embodiment 1, and will not be described again here.

[0054] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A manifold clamp, characterized in that, include: The handle has an internal cavity. A drive motor, which has an output shaft; A transmission rod, one end of which is connected to the output shaft of the drive motor to drive the transmission rod to rotate about its own axis; A transmission sleeve, which is fitted onto the transmission rod; A fixed clamp is provided at the front end of the handle; The movable chuck has one end fixedly connected to the transmission sleeve, and the other end is arranged opposite to the fixed chuck to form a jaw; An anti-rotation guide mechanism is disposed within the receiving cavity. The anti-rotation guide mechanism is connected to the transmission sleeve to restrict the circumferential rotation of the transmission sleeve. When the transmission rod rotates, the transmission sleeve moves linearly along the axis of the transmission rod and drives the movable chuck to move linearly synchronously, thereby changing the opening degree of the jaws.

2. The manifold clamp according to claim 1, characterized in that, The anti-rotation guiding mechanism includes at least one guide frame, which includes two vertical rods and a horizontal rod connected between the two vertical rods. The extension direction of the horizontal rod is parallel to the axis of the transmission rod. The top ends of the two vertical rods are fixedly connected to the cavity wall of the receiving cavity, and the transmission sleeve passes through the horizontal rod and can slide along it.

3. The manifold clamp according to claim 2, characterized in that, Two guide frames are configured and symmetrically arranged on both sides of the transmission rod.

4. The manifold clamp according to claim 2, characterized in that, The transmission sleeve has a mounting hole, in which a self-lubricating bushing is fixedly installed, and the crossbar passes through the self-lubricating bushing.

5. The manifold clamp according to claim 1, characterized in that, The anti-rotation guiding mechanism includes a keyway and a flat key that mates with the keyway. One of the keyway and the flat key is disposed on the cavity wall of the receiving cavity, and the other is disposed on the outer surface of the transmission sleeve.

6. The manifold clamp according to claim 5, characterized in that, The keyway is formed on the top of the cavity wall, and the top of the transmission sleeve is provided with a flat key that mates with the keyway. The flat key is embedded in the keyway and can slide along it.

7. The manifold clamp according to claim 5, characterized in that, The transmission sleeve has a keyway at its top, and the receiving cavity has a flat key protruding from its cavity wall. The flat key is embedded in the keyway and can slide along it.

8. The manifold clamp according to any one of claims 1-7, characterized in that, The output shaft of the drive motor is coaxially connected to one end of the transmission rod via a coupling, which is a flexible coupling.

9. The manifold clamp according to any one of claims 1-7, characterized in that, The transmission rod is at least partially provided with external threads, and the transmission sleeve has a through threaded hole in the middle. The transmission rod and the transmission sleeve are connected by the engagement of the external threads and the threaded hole.

10. The manifold clamp according to any one of claims 1-7, characterized in that, Both the fixed chuck and the movable chuck have interlocking serrated clamping surfaces on their opposing surfaces.

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