Ratchet wheel gland wrench and using method

Abstract

The invention belongs to the technical field of fastening tools, and discloses a ratchet wheel gland wrench and a using method.The ratchet wheel gland wrench comprises a movable ratchet wheel tightening head and a torque wrench, the movable ratchet wheel tightening head comprises an opening clamp assembly and an elastic assembly, and the opening clamp assembly comprises a fixed jaw assembly and a movable jaw assembly; the front portion of the fixed jaw assembly and the front portion of the movable jaw assembly are hinged to form a C-shaped movable opening structure, a U-shaped inner groove is formed in the side wall of the movable jaw assembly, the rear portion of the elastic assembly is fixedly connected to the side wall of the rear portion of the fixed jaw assembly, and the front portion of the elastic assembly is connected to the U-shaped inner groove in a sliding and pressing mode. The rear portion of the fixed jaw assembly is fixedly connected to the front portion of the torque wrench in an inserted mode. According to the design of the movable jaw and the plate spring, clockwise tightening of the gland head in a small space can be achieved only by reversing the wrench without lifting up; the digital display torque wrench monitors the torque and ensures the tightening precision; the movable ratchet wheel is inserted into the tightening head, and the tightening head can be selected according to the specification of the cable gland; the manufacturing cost is low.

Description

Technical Field

[0001] The invention belongs to the technical field of fastening tools, and in particular, relates to a ratchet gland wrench and a use method thereof. Background Art

[0002] At present, the high-voltage modules of new energy vehicles are widely tightened by the connection method of cable glands to achieve the sealing of high-voltage modules. The high-voltage module specifically refers to a structure that can convert alternating current and direct current into each other; the cable gland is also called a cable fixing head, which is installed at the connection between the high-voltage line and the high-voltage module. It plays the role of introducing the high-voltage line, fixing the position of the high-voltage line and sealing the connection. Due to the existence of the high-voltage line, it is impossible to use a conventional ratchet wrench to tighten the cable gland; due to the limitations of the high-voltage module's own structure, the spacing between the cable glands is small, and the tightening amplitude is small when using a conventional wrench. During the tightening process, the tool cannot be twisted in a single direction to transmit torque. It is often necessary to loosen and lift the wrench from the cable gland, re-clamp it, and twist the wrench again. This requires multiple reciprocating clamping, long tightening time, and low operating efficiency; during the tightening process, it does not have torque monitoring and data collection functions, the assembly torque cannot be guaranteed, and the tightening accuracy requirements of the designed cable gland cannot be met, and the assembly quality is low. The sizes of the glands are different, and the tooth angle of the existing open ratchet wrench is fixed, which cannot ensure that the gland nuts of various specifications can be tightly fitted, affecting the tightening efficiency and quality. Summary of the invention

[0003] The object of the present invention is to provide a ratchet gland wrench and a method for using the same. The ratchet principle is used to adopt a mechanical structure of a movable open-end pliers and a high-strength elastic leaf spring. With the help of force transmission during the rotation of the wrench, the wrench does not need to leave the gland when it rotates to the physical limit. It only needs to rotate the wrench in the opposite direction to pull the leaf spring away from the movable jaw assembly, so that the movable jaw assembly loosens the gland. After the wrench reaches the physical limit, no external force is applied to the leaf spring. The leaf spring automatically presses the movable rod jaw assembly again due to its own elastic force, and the gland continues to be clamped. The wrench can continue to twist in the clockwise direction to transmit torque, and the purpose of small space adjustment and fixation can be achieved without lifting and leaving the gland nut. The torque monitoring and data collection purposes can be achieved through the torque wrench. When the predetermined torque is reached, it can stop and ensure the tightening accuracy. The manufacturing cost of the movable ratchet tightening head is low, and it can be quickly plugged and fixed on the torque wrench. A variety of matching tightening heads are prefabricated according to the specifications of the gland nut. A suitable tightening head is selected before the tightening work starts, and the qualified flange nut is completely attached, thereby improving work efficiency and ensuring the tightening quality.

[0004] The specific contents of the plan are as follows:

[0005] A ratchet gland wrench comprises a movable ratchet tightening head and a torque wrench, wherein the movable ratchet tightening head is detachably connected to the torque wrench; the movable ratchet tightening head comprises an open-end pliers assembly and an elastic assembly, wherein the open-end pliers assembly comprises a fixed jaw assembly and a movable jaw assembly, wherein the middle side wall of the fixed jaw assembly is provided with a rectangular through-structure, wherein the rear portion of the movable jaw assembly is inserted into the rectangular through-structure and is hinged to the middle portion of the fixed jaw assembly through a jaw hinge pin, wherein the front portion of the fixed jaw assembly and the movable jaw assembly constitute a C-shaped movable opening structure, wherein the side wall of the movable jaw assembly is provided with a U-shaped inner groove whose opening is away from the jaw hinge pin, wherein the rear portion of the elastic assembly is fixedly connected to the rear side wall of the fixed jaw assembly, wherein the front portion of the elastic assembly is slidably crimped onto the U-shaped inner groove, and wherein the rear portion of the fixed jaw assembly is inserted and fixedly connected to the front portion of the torque wrench.

[0006] The connection between the movable ratchet tightening head and the torque wrench of the present invention is detachable, and the rear part of the movable ratchet tightening head is matched and plugged into the rectangular plug-in cavity of the front plug-in part of the torque wrench, and is fixed by the cooperation of the pin shaft and the shaft sleeve. The cooperation of the pin shaft and the shaft sleeve can provide stable support and positioning, reduce friction and wear, and extend the service life. In actual work, the operator can select a matching movable ratchet tightening head and a torque wrench to plug and fix according to the gland model. The torque wrench can monitor the torque and collect torque data during operation, and stop the operation when the predetermined torque is reached to ensure the quality of assembly. The movable ratchet tightening head of the present invention includes an open jaw assembly and an elastic assembly, and the front opening assembly is composed of a fixed jaw assembly and a movable jaw assembly hingedly connected, and the front ends of the two constitute a C-shaped movable opening structure. The jaw arc of the C-shaped movable opening structure should meet the requirements of being able to clamp the gland nut and not easy to disengage. The front of the fixed jaw assembly and the movable jaw assembly are both provided with an arc-shaped tooth surface, and the arrangement of the multiple teeth on the tooth surface can match the outer six sides of the gland nut to ensure that the outer six sides of the gland nut are fitted and clamped. The rear of the movable jaw assembly is inserted into the middle rectangular through structure of the fixed jaw assembly and is fixed in the first hinge pin hole and the second hinge pin hole by the jaw hinge pin. The movable jaw assembly can rotate circumferentially around the jaw hinge pin to tighten or loosen the gland. The back of the outer ring of the movable jaw assembly is provided with a U-shaped inner groove, and the opening of the U-shaped inner groove faces outward. The elastic component includes a leaf spring, which is an L-shaped strip spring plate, one edge of the leaf spring is fixed on the rear end side wall of the fixed jaw assembly, and one edge passes through the rectangular through hole on the rear end surface of the fixed jaw assembly to slide and limit press on the U-shaped inner groove, the U-shaped inner groove plays a guiding role, and the leaf spring can extend outward from the opening of the U-shaped inner groove. When the torque wrench of the present invention is used to tighten the gland, the operator aligns the opening of the open jaw assembly with the gland, and under the pressure of the leaf spring, the tooth surface of the movable jaw assembly fits with the outer six sides of the gland nut, and the gland is clamped together with the tooth surface of the fixed jaw assembly; then the tail end of the torque wrench is rotated clockwise to tighten the gland nut until the torque wrench is rotated to the physical limit position, and the operator rotates the torque wrench in the opposite direction. During the reverse rotation, there is only a certain friction force on the surface of the gland nut and it will not be loosened. After the movable jaw assembly is subjected to the reverse steering force, the leaf spring is pulled away from the movable jaw assembly by the reverse external force, and the movable jaw assembly is no longer subjected to the pressure of the leaf spring and loosens the gland. After the torque wrench is rotated to the limit position, the leaf spring is no longer pulled by the external force, and the movable arc jaw is automatically pressed under the elastic force of the leaf spring to re-clamp the gland; this is repeated many times, and the torque wrench is tightened to the physical limit position until the value displayed by the torque wrench reaches the target torque.

[0007] Furthermore, the fixed jaw assembly includes a fixed arc-shaped jaw, a fixed jaw connecting part and a wrench connecting part. The inner ring side wall of the fixed arc-shaped jaw is axially provided with an arc-shaped smooth surface and a toothed surface. The lower end face of the toothed surface is fixedly connected to the upper end face of the smooth surface to form a step structure. The toothed surface includes a plurality of teeth, and the plurality of teeth are radially evenly spaced on the toothed surface. The front end of the fixed jaw connecting part matches and is fixedly connected to the outer ring arc surface of the rear part of the fixed arc-shaped jaw. A rectangular through structure is provided on the side wall in the middle part of the fixed jaw connecting part. A through first hinge pin hole is provided in the middle part of the upper and lower end faces of the fixed jaw connecting part. The rear end face of the fixed jaw connecting part is fixedly connected to the front end face of the wrench connecting part. A rectangular through hole is provided on the rear end face of the fixed jaw connecting part, and the rectangular through hole is adjacent to the U-shaped inner groove.

[0008] The front part of the fixed jaw assembly is a fixed arc-shaped jaw. The tooth surface of the fixed arc-shaped jaw and the angles of the multiple teeth are all matched with the outer six-sided angles of the gland nut to ensure that the gland nut can be fully fitted and clamped to achieve the tightening of the gland. The front end shape of the fixed jaw connection part is matched and fixed on the outer ring arc surface of the fixed arc-shaped jaw. The middle side wall of the fixed jaw connection part is provided with a rectangular through structure. The middle part of the upper and lower end faces is also provided with a through first hinge pin hole, which is the same size and shape as the second hinge hole of the movable jaw. The jaw hinge pin is hinged in the first hinge hole and the second hinge hole. The fixed arc-shaped jaw and the movable arc-shaped jaw of the movable jaw assembly form a C-shaped opening jaw structure. The rear part of the movable jaw assembly is inserted in the rectangular through structure and is hinged in the fixed jaw connection part.

[0009] Furthermore, the wrench connecting part is a rectangular structure, and a first spring pin hole is provided on the upper end surface of the wrench connecting part, a spring pin is provided in the first spring pin hole, and the spring pin elastically protrudes out of the first spring pin hole. A rectangular recess is provided on the side wall adjacent to the rectangular through hole of the wrench connecting part, and two bolt fixing holes are provided on the rectangular recess at intervals.

[0010] The rear part of the fixed jaw assembly is the wrench connection part, which is a rectangular parallelepiped structure. The upper end surface is provided with a first spring pin hole for fixing with the plug-in part at the front end of the torque wrench. The front end surface of the wrench connection part is fixed to the right side of the rear end surface of the fixed jaw connection part, and a rectangular through hole is provided on the left side. A rectangular recess is provided on the side wall of the wrench connection part adjacent to the leaf spring, and a limit is provided at the top of the rectangular recess. Two bolt fixing holes are provided on the side wall of the rectangular recess at intervals, and one side of the leaf spring is passed through the rectangular through hole and fixed with the side wall of the wrench connection part by bolts. The fixing method can also be fixed in other detachable ways to facilitate disassembly and maintenance.

[0011] Furthermore, the movable jaw assembly includes a movable arc-shaped jaw and a movable jaw connecting part, the inner ring side wall of the movable arc-shaped jaw is axially provided with an arc-shaped smooth surface and a tooth surface, the lower end surface of the tooth surface is fixedly connected to the upper end surface of the smooth surface to form a step structure, the front end of the movable jaw connecting part is matched and fixedly connected to the outer ring arc surface of the rear part of the movable arc-shaped jaw, the rear part of the movable jaw connecting part is an arc-shaped plate, and the upper and lower end surfaces of the rear part of the movable jaw connecting part are provided with a through second hinge pin hole, the rear part of the movable jaw connecting part is inserted into the rectangular through structure of the fixed jaw connecting part, and the fixed jaw assembly and the movable jaw assembly are hinged by the jaw hinge pin shaft hinged in the first hinge pin hole and the second hinge pin hole.

[0012] The outer arc surface of the movable arc jaw of the movable jaw assembly is fixedly connected to the front end of the movable jaw connection part, and the inner ring of the movable arc jaw is provided with a smooth surface and a tooth surface consistent with the inner ring of the fixed arc jaw. The movable arc jaw and the fixed arc jaw cooperate to fit and clamp the gland nut to tighten and fix the gland. The rear end of the movable jaw connection part is inserted into the rectangular through structure of the fixed jaw connection part and is hinged by the jaw hinge pin. The smooth surface is to better fit the nut, prevent the nut from being strung when tightened, and enhance the strength of the gland. The main function of the tooth surface designed as a step structure is to rebound through the leaf spring when tightening to about 20°, and the tooth surface can slide on the back of the nut, which can achieve continuous reciprocating tightening and play a role similar to a ratchet.

[0013] Furthermore, a U-shaped inner groove is provided on the arc surface of the outer ring of the movable arc-shaped jaws, and the opening of the U-shaped inner groove is far away from the jaw hinge pin.

[0014] Furthermore, the elastic component includes a leaf spring, which is a strip spring plate with an L-shaped structure. One side of the leaf spring passes through the rectangular through hole, fits into the rectangular inner recess of the wrench connecting part and is bolted to two bolt fixing holes, and the other side is slidably crimped onto the U-shaped inner groove of the movable arc-shaped jaws.

[0015] The elastic component includes a leaf spring, which is a strip spring steel plate bent in the middle and has elasticity. Its rear part is fixed on the side wall of the wrench connection part, and its front end is elastically limited and pressed on the outer arc surface of the movable arc jaw, exerting elastic pressure on the movable arc jaw. When the leaf spring is pulled away from the outer arc surface of the movable arc jaw by external force, the movable arc jaw loses pressure and loosens the gland nut.

[0016] Furthermore, the torque wrench includes a plug-in portion, a second spring pin hole is provided on the upper end surface of the plug-in portion, the plug-in portion is arranged at the front end of the torque wrench, and a plug-in cavity is concavely provided on the front end surface of the plug-in portion. The wrench connecting portion is matched and inserted in the plug-in cavity and is fixed in the second spring pin hole by elastic clamping of a spring pin.

[0017] The plug-in part of the torque wrench is arranged at the front end of the torque wrench, and a plug-in cavity is arranged inwardly on the front end surface thereof. The shape and size of the plug-in cavity match the wrench connecting part. The wrench connecting part is inserted in the plug-in cavity. When the spring pin enters the plug-in cavity, the spring pin is inserted into the first spring pin hole. When it reaches the second spring pin hole, it pops out of the second spring pin hole without pressure and gets stuck. When disassembly is required, the spring pin is manually pressed to retract it into the second spring pin hole, and the wrench connecting part is pulled out.

[0018] Furthermore, the torque wrench is a digital torque wrench, and also includes a wrench housing, a torque sensor, a digital display component and a battery. The torque sensor is arranged at the front of the wrench housing, the digital display component is arranged in the middle of the wrench housing, and the torque sensor and the digital display component are electrically connected to the battery respectively.

[0019] The torque wrench is an existing technology, and its internal structure is not described in detail. The movable ratchet tightening head is plugged and fixed on the front end of the torque wrench. During the tightening process, torque monitoring and data collection can be performed, and the assembly torque is guaranteed to meet the design requirements and the assembly quality is high.

[0020] Furthermore, the material of the opening pliers assembly is ultra-high strength steel, and the material of the leaf spring is high carbon spring steel.

[0021] The opening pliers assembly of the present invention is preferably made of high-strength and high-toughness 42 chromium-molybdenum alloy, and the leaf spring is made of 65 manganese spring steel. 65 manganese spring steel is one of the most common high-carbon spring steels and has good comprehensive mechanical properties, especially its work hardening effect is remarkable.

[0022] A method for using a ratchet gland wrench, characterized in that the steps are as follows:

[0023] S10, the operator selects a matching active ratchet tightening head according to the gland model, plugs the active ratchet tightening head into the torque wrench, aligns the opening of the open-end pliers assembly with the gland, and under the pressure of the leaf spring, the teeth of the active arc-shaped jaws match and fit with the six outer surfaces of the gland nut to achieve clamping of the active ratchet tightening head and the gland, completing the clamping operation of the ratchet digital display gland wrench and the gland;

[0024] S11. The operator holds the tail of the torque wrench and tightens the gland nut clockwise until the torque wrench rotates to the physical limit position;

[0025] S12. The operator rotates the torque wrench in the opposite direction. After the movable arc-shaped jaw is subjected to the reverse steering force, the leaf spring is pulled away from the movable arc-shaped jaw by the reverse external force. The movable arc-shaped jaw is no longer subjected to the pressure of the leaf spring and the gland is loosened. After the torque wrench is rotated to the limit position, the leaf spring is no longer subjected to the external force and automatically presses the movable arc-shaped jaw under the elastic force of the leaf spring itself to re-tighten the gland.

[0026] S13, tighten the ratchet digital display cable gland wrench to the physical limit position again, and repeat the above operation until the value displayed by the torque wrench reaches the target torque.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention utilizes the ratchet principle and adopts a mechanical structure of a movable open-end pliers with a high-strength elastic leaf spring. With the help of force transmission during the rotation of the wrench, the wrench does not need to leave the gland when it rotates to the physical limit. It only needs to rotate the wrench in the opposite direction to pull the leaf spring away from the movable jaw assembly, and the movable jaw assembly releases the gland. After the wrench reaches the physical limit, it no longer applies external force to the leaf spring. The leaf spring's own elastic force automatically presses the movable rod jaw assembly again, tightens the gland, and the wrench can continue to twist in the clockwise direction to transmit torque, thereby achieving the purpose of small space adjustment and fixation;

[0029] 2. The present invention realizes the purpose of torque monitoring and data collection through a torque wrench, and stops when a predetermined torque is reached, thereby ensuring assembly quality;

[0030] 3. The movable ratchet tightening head of the present invention can be quickly assembled and disassembled, has a low manufacturing cost, can better clamp gland nuts of different specifications, and improves tightening efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a perspective schematic diagram of the ratchet digital display cable gland wrench of the present invention;

[0032] Figure 2 A side view of the ratchet digital display cable gland wrench of the present invention;

[0033] Figure 3 It is a structural schematic diagram of the fixed jaw assembly of the present invention;

[0034] Figure 4 It is a schematic structural diagram of the movable jaw assembly of the present invention.

[0035] In the figure:

[0036] 1. Movable ratchet tightening head; 1.1. Open jaw assembly; 1.11. Fixed jaw assembly; 1.111.

[0037] Rectangular through structure; 1.112. Fixed arc-shaped jaws; 1.113. Fixed jaw connection;

[0038] 1.1131. First hinge pin hole; 1.1132. Rectangular through hole; 1.114. Wrench connection portion;

[0039] 1.1141. First spring pin hole; 1.1142. Rectangular inner recess; 1.1143. Bolt fixing hole;

[0040] 1.12. Movable jaw assembly; 1.121. U-shaped inner groove; 1.122. Movable arc-shaped jaw;

[0041] 1.123. Movable jaw connection portion; 1.1231. Second hinge pin hole; 1.2. Elastic component;

[0042] 1.21. Leaf spring; 1.3. Jaw hinge pin; 1.4. Smooth surface; 1.5. Tooth surface; 2. Torque wrench; 2.1. Plug-in part; 2.10. Second spring pin hole; 2.11 Concave with a plug-in cavity; 2.2. Wrench housing; 2.3. Torque sensor; 2.4. Digital display assembly; 2.5. Battery. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0045] It should be noted that the directions or positional relationships indicated by the terms "front", "rear", "inside", "outside", "left", "right", etc. in the present invention are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0046] It is particularly important to point out that any symbol and / or number in the specification which is not marked in the accompanying drawings is not a drawing mark.

[0047] The embodiment of the present invention, that is, an embodiment of a ratchet gland wrench and a method of use, is described below in conjunction with Figure 1 , Figure 2 , Figure 3 and Figure 4 Provide detailed explanation.

[0048] Embodiment 1:

[0049] See Figure 1As shown, a ratchet gland wrench comprises a movable ratchet tightening head 1 and a torque wrench 2, wherein the movable ratchet tightening head 1 is detachably connected to the torque wrench 2; the movable ratchet tightening head 1 comprises an open jaw assembly 1.1 and an elastic assembly 1.2, wherein the open jaw assembly 1.1 comprises a fixed jaw assembly 1.11 and a movable jaw assembly 1.12, wherein a rectangular through structure 1.111 is provided on the middle side wall of the fixed jaw assembly 1.11, and the rear of the movable jaw assembly 1.12 is inserted into the rectangular through structure 1.111 and hinged through a jaw hinge pin 1.3 Connected to the middle part 1.11 of the fixed jaw assembly, the front parts of the fixed jaw assembly 1.11 and the movable jaw assembly 1.12 form a C-shaped movable opening structure, the side wall of the movable jaw assembly 1.12 is provided with a U-shaped inner groove 1.121 with an opening away from the jaw hinge pin 1.3, the rear part of the elastic assembly 1.2 is fixedly connected to the rear side wall of the fixed jaw assembly 1.11, the front part of the elastic assembly 1.2 is slidably crimped on the U-shaped inner groove 1.121, and the rear part of the fixed jaw assembly 1.11 is inserted and fixedly connected to the front part of the torque wrench 2.

[0050] See Figure 2 As shown, the fixed jaw assembly 1.11 includes a fixed arc-shaped jaw 1.112, a fixed jaw connecting portion 1.113 and a wrench connecting portion 1.114. The inner ring side wall of the fixed arc-shaped jaw 1.112 is axially provided with an arc-shaped smooth surface 1.4 and a tooth surface 1.5. The lower end surface of the tooth surface 1.5 is fixedly connected to the upper end surface of the smooth surface 1.4 to form a stepped structure. The tooth surface 1.5 includes a plurality of teeth, and the plurality of teeth are radially evenly spaced on the tooth surface 1.5. The front end of the fixed jaw connecting portion 1.113 matches the fixed connection A rectangular through structure 1.111 is provided on the side wall of the middle part of the fixed jaw connecting part 1.113 on the outer arc surface at the rear part of the fixed arc-shaped jaw 1.112, a through first hinge pin hole 1.1131 is provided in the middle part of the upper and lower end surfaces of the fixed jaw connecting part 1.113, the rear end surface of the fixed jaw connecting part 1.113 is fixedly connected to the front end surface of the wrench connecting part 1.114, a rectangular through hole 1.1132 is provided on the rear end surface of the fixed jaw connecting part 1.113, and the rectangular through hole 1.1132 is adjacent to the U-shaped inner groove 1.121.

[0051] The wrench connecting part 1.114 is a rectangular parallelepiped structure, and a first spring pin hole 1.1141 is provided on the upper end surface of the wrench connecting part 1.114, and a spring pin is provided in the first spring pin hole 1.1141. The spring pin elastically protrudes outside the first spring pin hole 1.1141, and a rectangular recessed part 1.1142 is provided on the side wall of the wrench connecting part 1.114 adjacent to the rectangular through hole 1.1132, and two bolt fixing holes 1.1143 are provided on the rectangular recessed part 1.1142 at intervals.

[0052] See Figure 3As shown, the movable jaw assembly 1.12 includes a movable arc-shaped jaw 1.122 and a movable jaw connecting portion 1.123. The inner ring side wall of the movable arc-shaped jaw 1.122 is axially provided with an arc-shaped smooth surface 1.4 and a tooth surface 1.5. The lower end surface of the tooth surface 1.5 is fixedly connected to the upper end surface of the smooth surface 1.4 to form a stepped structure. The front end of the movable jaw connecting portion 1.123 is matched and fixedly connected to the outer ring arc surface of the rear part of the movable arc-shaped jaw 1.122. The movable jaw connecting portion The rear part of the movable jaw connecting part 1.123 is an arc-shaped plate, and the upper and lower end surfaces of the rear part of the movable jaw connecting part 1.123 are provided with a through second hinge pin hole 1.1231, and the rear part of the movable jaw connecting part 1.123 is inserted into the rectangular through structure 1.111 of the fixed jaw connecting part 1.113, and the fixed jaw assembly 1.11 and the movable jaw assembly 1.12 are hinged through the jaw hinge pin shaft 1.3 which is hinged in the first hinge pin hole 1.1131 and the second hinge pin hole 1.1231.

[0053] A U-shaped inner groove 1.121 is provided on the outer arc surface of the movable arc-shaped jaw 1.122, and the opening of the U-shaped inner groove 1.121 is far away from the jaw hinge pin 1.3.

[0054] See Figure 2 As shown, the elastic component 1.2 includes a leaf spring 1.21, which is a strip spring plate with an L-shaped structure. One side of the leaf spring 1.21 passes through the rectangular through hole 1.1132 and fits on the rectangular inner recess 1.1142 of the wrench connecting part 1.114 and is bolted to two bolt fixing holes 1.1143, and the other side is slidably crimped on the U-shaped inner groove 1.121 of the movable arc-shaped jaw 1.122.

[0055] The torque wrench 2 includes a plug-in portion 2.1, on the upper end surface of which a second spring pin hole 2.10 is provided. The plug-in portion 2.1 is arranged at the front end of the torque wrench 2, and the front end surface of the plug-in portion 2.1 is concavely provided with a plug-in cavity 2.11, and the wrench connecting portion 1.114 is matched and inserted in the plug-in cavity 2.11 and fixed in the second spring pin hole 2.10 by a spring elastic pin.

[0056] The torque wrench 2 is a digital torque wrench, and also includes a wrench housing 2.2, a torque sensor 2.3, a digital display component 2.4 and a battery 2.5. The torque sensor 2.3 is arranged at the front part of the wrench housing 2.2, the digital display component 2.4 is arranged at the middle part of the wrench housing 2.2, and the torque sensor 2.3 and the digital display component 2.4 are electrically connected to the battery 2.5 respectively.

[0057] The material of the opening pliers assembly 1.1 is ultra-high strength steel, and the material of the leaf spring 1.21 is high carbon spring steel.

[0058] Embodiment 2:

[0059] The present invention also provides a method for using the ratchet gland wrench, the steps of which are as follows:

[0060] S10, the operator selects a matching active ratchet tightening head 1 according to the cable gland model, plugs the active ratchet tightening head 1 into the torque wrench 2, aligns the opening of the open-end pliers assembly 1.1 with the cable gland, and under the pressure of the leaf spring 1.21, the teeth of the tooth surface 1.5 of the active arc-shaped jaw 1.122 match and fit with the six outer surfaces of the cable gland nut, so as to achieve the clamping of the active ratchet tightening head 1 and the cable gland, and complete the clamping operation of the ratchet digital display cable gland wrench and the cable gland;

[0061] S11, the operator holds the tail of the torque wrench 2 and tightens the gland nut clockwise until the torque wrench 2 is rotated to the physical limit position;

[0062] S12, the operator rotates the torque wrench 2 in the opposite direction. After the movable arc-shaped jaw 1.122 is subjected to the reverse steering force, the leaf spring 1.21 is pulled away from the movable arc-shaped jaw 1.122 by the reverse external force. The movable arc-shaped jaw 1.122 is no longer subjected to the pressure of the leaf spring 1.21 and releases the gland. After the torque wrench 2 is rotated to the limit position, the leaf spring 1.21 is no longer subjected to the external force and automatically presses the movable arc-shaped jaw 1.122 under its own elastic force to re-tighten the gland.

[0063] S13, tighten the ratchet digital display cable gland wrench to the physical limit position again, and repeat the above operation until the value displayed by the torque wrench 2 reaches the target torque.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ratchet gland wrench, characterized in that: The invention comprises a movable ratchet tightening head (1) and a torque wrench (2), wherein the movable ratchet tightening head (1) and the torque wrench (2) are detachably connected; the movable ratchet tightening head (1) comprises an open jaw assembly (1.1) and an elastic assembly (1.2); the open jaw assembly (1.1) comprises a fixed jaw assembly (1.11) and a movable jaw assembly (1.12); a rectangular through-structure (1.111) is provided on the middle side wall of the fixed jaw assembly (1.11); the rear of the movable jaw assembly (1.12) is inserted into the rectangular through-structure (1.111) and is hinged to the fixed jaw assembly via a jaw hinge pin (1.3). The middle part (1.11) of the jaw assembly, the front part of the fixed jaw assembly (1.11) and the movable jaw assembly (1.12) form a C-shaped movable opening structure, the side wall of the movable jaw assembly (1.12) is provided with a U-shaped inner groove (1.121) with an opening away from the jaw hinge pin (1.3), the rear part of the elastic assembly (1.2) is fixedly connected to the rear side wall of the fixed jaw assembly (1.11), the front part of the elastic assembly (1.2) is slidably pressed on the U-shaped inner groove (1.121), and the rear part of the fixed jaw assembly (1.11) is inserted and fixedly connected to the front part of the torque wrench (2).

2. The ratchet digital display cable gland wrench according to claim 1, characterized in that: The fixed jaw assembly (1.11) comprises a fixed arc-shaped jaw (1.112), a fixed jaw connecting portion (1.113) and a wrench connecting portion (1.114); an arc-shaped smooth surface (1.4) and a tooth surface (1.5) are axially arranged on the inner ring side wall of the fixed arc-shaped jaw (1.112); the lower end surface of the tooth surface (1.5) is fixedly connected to the upper end surface of the smooth surface (1.4) to form a stepped structure; the tooth surface (1.5) comprises a plurality of teeth, and the plurality of teeth are radially evenly spaced on the tooth surface (1.5); the front end of the fixed jaw connecting portion (1.113) matches the fixed connecting portion (1.114); A rectangular through structure (1.111) is provided on the side wall of the middle part of the fixed jaw connecting part (1.113) on the outer arc surface of the rear part of the fixed arc-shaped jaw (1.112); a through first hinge pin hole (1.1131) is provided in the middle of the upper and lower end surfaces of the fixed jaw connecting part (1.113); the rear end surface of the fixed jaw connecting part (1.113) is fixedly connected to the front end surface of the wrench connecting part (1.114); a rectangular through hole (1.1132) is provided on the rear end surface of the fixed jaw connecting part (1.113); and the rectangular through hole (1.1132) is adjacent to the U-shaped inner groove (1.121).

3. The ratchet digital display cable gland wrench according to claim 2, characterized in that: The spanner connecting part (1.114) is a rectangular parallelepiped structure. A first spring pin hole (1.1141) is provided on the upper end surface of the spanner connecting part (1.114). A spring pin is provided in the first spring pin hole (1.1141). The spring pin elastically protrudes out of the first spring pin hole (1.1141). A rectangular inner recess (1.1142) is provided on the side wall of the spanner connecting part (1.114) adjacent to the rectangular through hole (1.1132). Two bolt fixing holes (1.1143) are provided on the rectangular inner recess (1.1142) at intervals.

4. The ratchet digital display cable gland wrench according to claim 3, characterized in that: The movable jaw assembly (1.12) comprises a movable arc-shaped jaw (1.122) and a movable jaw connecting portion (1.123); an arc-shaped smooth surface (1.4) and a tooth surface (1.5) are axially arranged on the inner ring side wall of the movable arc-shaped jaw (1.122); the lower end surface of the tooth surface (1.5) is fixedly connected to the upper end surface of the smooth surface (1.4) to form a stepped structure; the front end of the movable jaw connecting portion (1.123) is matched and fixedly connected to the outer ring arc surface of the rear part of the movable arc-shaped jaw (1.122); The movable jaw connecting part (1.123) is provided with an arc-shaped plate at the rear part thereof, and the upper and lower end surfaces of the rear part thereof are provided with a through second hinge pin hole (1.1231); the rear part of the movable jaw connecting part (1.123) is inserted into the rectangular through structure (1.111) of the fixed jaw connecting part (1.113); the fixed jaw assembly (1.11) and the movable jaw assembly (1.12) are hingedly connected through the jaw hinge pin shaft (1.3) hingedly connected to the first hinge pin hole (1.1131) and the second hinge pin hole (1.1231).

5. The ratchet digital display cable gland wrench according to claim 4, characterized in that: A U-shaped inner groove (1.121) is provided on the outer arc surface of the movable arc-shaped jaw (1.122), and the opening of the U-shaped inner groove (1.121) is away from the jaw hinge pin (1.3).

6. The ratchet digital display cable gland wrench according to claim 5, characterized in that: The elastic component (1.2) comprises a leaf spring (1.21), which is a strip spring plate with an L-shaped structure. One side of the leaf spring (1.21) passes through a rectangular through hole (1.1132) and fits on a rectangular inner recess (1.1142) of a wrench connection part (1.114) and is bolted to two bolt fixing holes (1.1143), and the other side is slidably crimped on a U-shaped inner recess (1.121) of the movable arc-shaped jaw (1.122).

7. The ratchet digital display cable gland wrench according to claim 6, characterized in that: The torque wrench (2) comprises a plug-in portion (2.1), a second spring pin hole (2.10) is provided on the upper end surface of the plug-in portion (2.1), the plug-in portion (2.1) is arranged at the front end of the torque wrench (2), a plug-in cavity (2.11) is provided inwardly on the front end surface of the plug-in portion (2.1), and the wrench connecting portion (1.114) is matched and plugged into the plug-in cavity (2.11) and is fixed in the second spring pin hole (2.10) by elastic clamping of a spring pin.

8. The ratchet digital display cable gland wrench according to claim 7, characterized in that: The torque wrench (2) is a digital display torque wrench, and further comprises a wrench housing (2.2), a torque sensor (2.3), a digital display component (2.4) and a battery (2.5); the torque sensor (2.3) is arranged at the front portion of the wrench housing (2.2); the digital display component (2.4) is arranged at the middle portion of the wrench housing (2.2); and the torque sensor (2.3) and the digital display component (2.4) are respectively electrically connected to the battery (2.5).

9. The ratchet digital display cable gland wrench according to claim 8, characterized in that: The material of the opening pliers assembly (1.1) is ultra-high strength steel, and the material of the leaf spring (1.21) is high carbon spring steel.

10. A method for using a ratchet gland wrench, characterized in that: Here are the steps: S10, the operator selects a matching active ratchet tightening head (1) according to the cable gland model, plugs the active ratchet tightening head (1) into the torque wrench (2), aligns the opening of the open-end pliers assembly (1.1) with the cable gland, and under the pressure of the leaf spring (1.21), the teeth of the active arc-shaped jaws (1.122) match and fit with the six outer surfaces of the cable gland nut, thereby achieving the clamping of the active ratchet tightening head (1) and the cable gland, and completing the clamping operation of the ratchet digital display cable gland wrench and the cable gland; S11, the operator holds the tail of the torque wrench (2) and tightens the gland nut clockwise until the torque wrench (2) is rotated to the physical limit position; S12, the operator rotates the torque wrench (2) in the opposite direction, and after the movable arc-shaped jaw (1.122) is subjected to the reverse steering force, the leaf spring (1.21) is pulled away from the movable arc-shaped jaw (1.122) by the reverse external force, and the movable arc-shaped jaw (1.122) is no longer subjected to the pressure of the leaf spring (1.21) and releases the cable gland. After the torque wrench (2) is rotated to the limit position, the leaf spring (1.21) is no longer subjected to the external force and automatically presses the movable arc-shaped jaw (1.122) under the elastic force of the leaf spring (1.21) itself to re-tighten the cable gland; S13, tighten the ratchet digital cable gland wrench to the physical limit position again, and repeat the above operation until the value displayed by the torque wrench (2) reaches the target torque.

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