Cutter feeding mechanism and cable sample preparation tool

Abstract

The invention discloses a cutter feeding mechanism and a cable sample preparation tool, and relates to the technical field of cable sample preparation tools, the cutter feeding mechanism comprises a rotating rack, a sliding frame, a rotating head and a locking assembly, the sliding frame is slidably connected to the rotating rack in the direction perpendicular to the axial direction of a cable, and a shaft rod parallel to the axial direction of the cable is fixedly connected to the sliding frame; the rotating head is coaxially and rotatably connected to the shaft rod, the rotating head is provided with a plurality of cutters and a plurality of clamping grooves which are distributed in an annular array mode, the clamping grooves correspond to the cutters in a one-to-one mode, the locking assembly comprises a clamping block connected to the shaft rod in a sliding mode, and the clamping block is provided with a locking station matched with any clamping groove in a clamping mode in the sliding stroke along the shaft rod. According to the type of a cable needing sample preparation, a proper cutter can be selected by rotating the rotating head to be aligned with the cable needing sample preparation, and the rotating head and the cutter are locked on the shaft rod and the sliding frame by the locking assembly during sample preparation, so that the stability of the sample preparation cutter is ensured, the sample preparation cutter can be adaptive to various types of cables, and the application range is wide.

Description

Technical Field

[0001] The invention relates to the technical field of cable sample preparation tools, in particular to a tool feeding mechanism and a cable sample preparation tool. Background Art

[0002] As a key component of power transmission systems, power cable quality testing is crucial for ensuring stable operation. Sample preparation is an essential step in cable quality testing, directly impacting the accuracy and reliability of subsequent test results. Current traditional cable sample preparation methods present numerous issues and challenges, prompting the development of a lightweight power cable sample preparation tool.

[0003] Traditional cable sample preparation methods mainly include manual sampling and mechanical tool sampling. Although manual sampling is flexible, it is inefficient and requires high skills from operators, making it difficult to achieve standardization and batch processing. Mechanical tool sampling can significantly improve sampling efficiency.

[0004] In the existing technology, cable sampling tools usually use a single cutting tool to remove the cable sheath. However, for different types of cables, such as enameled wire cables, PVC insulated cables, armored cables, etc., a single cutting tool is difficult to meet the cutting requirements at the same time and has limitations. Summary of the Invention

[0005] The object of the present invention is to provide a tool feeding mechanism and a cable sample preparation tool to solve the deficiencies in the above-mentioned prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tool feeding mechanism, comprising: a rotating frame; a slide, which is slidably connected to the rotating frame in a direction perpendicular to the cable axis, and the slide is fixedly connected to a shaft rod parallel to the cable axis; a swivel head, which is coaxially rotatably connected to the shaft rod, and the swivel head is provided with multiple tools and multiple slots distributed in a ring array, and each slot corresponds to each tool one by one; a locking assembly, which includes a card block slidably connected to the shaft rod, and the card block has a locking position that engages with any slot during the sliding stroke of the card block along the shaft rod; when working, the card block is driven to slide out of the locking position, and after the swivel head is rotated to align the required tool with the cable, the card block slides to the locking position. During the rotation of the rotating frame, the slide slides close to the cable so that the tool aligned with the cable can cut the outer skin of the cable.

[0007] Furthermore, an elastic member is provided between the slide and the clamping block, and the process of the elastic member recovering its deformation drives the clamping block to move to the locking position.

[0008] Furthermore, the elastic member includes a first compression spring sleeved on the shaft, one end of the first compression spring abuts against the clamping block, and the other end abuts against the slide.

[0009] Furthermore, an arc-shaped groove is provided on the card block, and the arc-shaped groove has a movable groove wall elastically and slidingly connected to the card block, an inclined guide rod is fixedly connected to the movable groove wall, and a folding rod is elastically and rotatably connected to the rotating frame, and one end of the folding rod can be engaged with the arc-shaped groove.

[0010] Furthermore, a second compression spring is provided between the movable groove wall and the clamping block, one end of the second compression spring abuts against the clamping block, and the other end abuts against the movable groove wall.

[0011] Furthermore, a torsion spring is sleeved on the rotating shaft between the folding rod and the rotating frame, one end of the torsion spring is connected to the folding rod, and the other end is connected to the rotating frame.

[0012] Furthermore, the rotating head is coaxially connected to a central shaft, the central shaft is coaxially connected to a gear, the gear is coaxially embedded with a ratchet, the central shaft is elastically hinged with a pawl, the pawl and the ratchet are one-way engaged, and a rack is fixedly connected to the rotating frame, which can drive the gear and the rack to engage during the sliding process of the slide.

[0013] Furthermore, a screw is rotatably connected to the rotating frame, the length direction of the screw is consistent with the sliding direction of the slide on the rotating frame, the screw is driven to rotate by a reduction motor installed on the rotating frame, and a screw sleeve is fixedly connected to the slide, and the screw sleeve is threadedly connected to the screw.

[0014] Furthermore, there are three cutters, namely a cutter for cutting the soft outer sheath of the cable, a cutter for cutting the metal armor layer of the cable, and a cutter for cutting the cable core.

[0015] The present invention also provides a cable sample preparation tool, comprising a tool base body, a movable base, a tool feeding mechanism and two clamping mechanisms for clamping the cable. The movable base is arranged on the tool base body for axial movement along the cable, and the rotating frame base of the tool feeding mechanism is rotatably connected to the movable base and arranged between the two clamping mechanisms.

[0016] Compared with the prior art, the tool feeding mechanism provided by the present invention can select a suitable tool to align with the cable to be sampled by rotating the rotary head according to the type of cable to be sampled. During sampling, the locking assembly locks the rotary head and the tool to the shaft and the slide, thereby ensuring the stability of the sample tool. It can adapt to various types of cables and has a wide range of applications.

[0017] Since the above-mentioned tool feeding mechanism has the above-mentioned effects, the cable sample preparation tool including the tool feeding mechanism should also have the above-mentioned effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction to the drawings required for use in the embodiments will be given below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic structural diagram of a cable sample preparation tool provided in an embodiment of the present invention; Figure 2 Schematic diagram of the structure of the tool feeding mechanism provided in the embodiment of the present invention Figure I ; Figure 3 Schematic diagram of the structure of the tool feeding mechanism provided in the embodiment of the present invention Figure II ; Figure 4 Schematic diagram of the structure of the tool feeding mechanism provided in the embodiment of the present invention Figure III ; Figure 5 A schematic structural diagram of a locking mechanism provided in an embodiment of the present invention; Figure 6 A schematic diagram of the structure of the locking mechanism provided in an embodiment of the present invention when unlocked; Figure 7 A schematic diagram of the structure when tool switching is completed according to an embodiment of the present invention; Figure 8 A schematic diagram of the structure of the folding rod provided by an embodiment of the present invention when it abuts against the inclined guide rod; Figure 9 This is a schematic structural diagram of the tool feeding mechanism provided by an embodiment of the present invention when rotary cutting a cable.

[0020] Description of reference numerals: 1. Tool feeding mechanism; 11. Rotating frame; 12. Slide rail; 13. Slide; 14. Shaft; 15. Rotating head; 16. Tool; 17. Slot; 18. Block; 19. Slip ring; 110. First compression spring; 111. Arc groove; 112. Movable groove wall; 113. Inclined guide rod; 114. Folding rod; 115. Second compression spring; 116. Torsion spring; 117. Center shaft; 118. Gear; 119. Ratchet; 120. Pawl; 121. Rack; 122. Screw; 123. Screw sleeve; 124. Reducer motor; 2. Tool base; 21. Cover; 3. Cable. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] See also Figures 1-9An embodiment of the present invention provides a cable sample preparation tool, comprising a tool base 2, a movable base, a tool feed mechanism 1, and two clamping mechanisms. The two clamping mechanisms (not shown) are coaxially disposed on the tool base 2 and are used to clamp and tighten the cable 3 to be sampled. The clamping mechanism employs a central clamping mechanism, such as a three-jaw chuck. The movable base is disposed on the tool base 2 for axial movement along the cable 3. Movement of the movable base on the tool base 2 is driven by a linear drive device, which can be an electric push rod, hydraulic cylinder, pneumatic cylinder, or linear motor. The tool feed mechanism 1 is rotatably mounted on the movable base and located between the two clamping mechanisms. It performs rotary cutting on the cable 3 segment between the two clamping mechanisms. The tool base 2 is provided with a housing having a cover 21. When the cover 21 is opened, the tool feed mechanism 1 is exposed, allowing for inspection and maintenance of the tool feed mechanism 1, replacement of the tool 16, switching of the tool 16, and monitoring of the sample preparation process.

[0023] The tool feed mechanism 1 of the cable sample preparation tool includes a rotating frame 11, a slide 13, a rotary head 15, a shaft 14, and a locking assembly. The rotating frame 11 is rotatably connected to a movable base, which is provided with a drive motor and a gear set for driving the rotating frame 11. The rotating axis of the rotating frame 11 is coaxial with the clamping mechanism and the cable 3. The rotating frame 11 is fixedly connected to a slide rail 12, and the slide 13 is slidably mounted on the slide rail 12, that is, the slide 13 is slidably connected to the rotating frame 11 in a direction perpendicular to the axial direction of the cable 3. The rotating frame 11 is provided with a drive assembly for driving the slide 13 to slide along the slide rail 12. The drive assembly can be a screw 122 propulsion device, an electric push rod, or a cylinder. Preferably, the driving assembly includes a screw 122, a sleeve 123 and a reduction motor 124. The screw 122 is rotatably connected to the rotating frame 11. The length direction of the screw 122 is consistent with the sliding direction of the slide 13 on the rotating frame 11, that is, the screw 122 is parallel to the slide rail 12, the sleeve 123 is fixedly connected to the slide 13, the sleeve 123 is threadedly sleeved on the screw 122, and the reduction motor 124 is installed on the rotating frame 11 for driving the screw 122 to rotate. The reduction motor 124 is specifically composed of a motor and a reducer.

[0024] The shaft 14 is fixedly connected to the slide 13, and the shaft 14 is parallel to the axial direction of the cable 3. The rotating head 15 is a circular structure, coaxially connected to the shaft 14, and there is no axial displacement between the rotating head 15 and the shaft 14. The rotating head 15 is provided with a plurality of cutters 16 and a plurality of slots 17. The cutters 16 are distributed in a ring array, and the slots 17 are also distributed in a ring array. Each slot 17 corresponds to each cutter 16 one by one, that is, one cutter 16 corresponds to one slot 17. The number of cutters 16 is 1-5 or even more. Preferably, there are three sets of cutters 16. According to several common cable sample preparation methods, the three sets of cutters 16 are respectively a cutter 16 for cutting the soft outer skin of the cable 3, a cutter 16 for cutting the metal armor layer of the cable 3, and a cutter 16 for cutting the core of the cable 3, which can basically cover the conventional cable sample preparation requirements.

[0025] The locking assembly includes a slip ring 19 and a clamping block 18 , which are fixedly connected or integrally formed with each other. The clamping block 18 is connected to the shaft 14 by sliding along the axial direction of the shaft 14 via the slip ring 19 . The clamping block 18 and the shaft 14 do not have a rotational relationship. The clamping block 18 has a locking position during its sliding travel along the shaft 14 . In the locking position, the clamping block 18 can engage with any of the slots 17 . If the clamping block 18 is not aligned with any of the slots 17 , it will be blocked by the end face of the rotary head 15 and cannot move to the locking position. A first compression spring 110 is provided between the slide 13 and the clamping block 18. The first compression spring 110 is sleeved on the shaft 14. One end of the first compression spring 110 abuts the clamping block 18, and the other end abuts the slide 13. Of course, the first compression spring 110 can be replaced by other elastic members, as long as it is ensured that the elastic member drives the clamping block 18 to move to the locking position during the process of recovering its deformation. For example, the elastic member can also be a first tension spring, the axial direction of the first tension spring being arranged along the axial direction of the shaft 14. The end of the first tension spring close to the rotary head 15 is connected to the shaft 14, and the end close to the slide 13 is connected to the slide 13. In short, the elastic member can keep the clamping block 18 in the locking position, thereby locking the orientation of the tool 16 relative to the shaft 14.

[0026] In the above technical solution, when it is necessary to switch the tool 16, first drive the block 18 to slide out of the slot 17, that is, out of the locking position, and then rotate the head 15 to align the required tool 16 with the cable 3, and then slide the block 18 to the locking position and engage with the slot 17 corresponding to the tool 16, lock the head 15 relative to the shaft 14, and drive the motor to drive the rotating frame 11 to rotate. During this process, the slide 13 slides close to the cable 3, so that the tool 16 aligned with the cable 3 cuts the outer skin of the cable 3, thereby exposing the core of the cable 3.

[0027] In another embodiment provided by the present invention, an L-shaped folding rod 114 is rotatably connected to the rotating frame 11, and a torsion spring 116 is sleeved on the rotating shaft between the folding rod 114 and the rotating frame 11, one end of the torsion spring 116 is connected to the folding rod 114, and the other end is connected to the rotating frame 11, and an arc groove 111 is provided on the clamping block 18, and a part of the groove wall of the arc groove 111 is movable. The movable groove wall 112 is slidably connected to the clamping block 18, that is, there is a sliding structure between the movable groove wall 112 and the clamping block 18, such as the cooperation of a slider and a slide groove, or other sliding structures in the prior art, a second compression spring 115 is provided between the movable groove wall 112 and the clamping block 18, one end of the second compression spring 115 abuts the clamping block 18, and the other end abuts the movable groove wall 112, and an inclined guide rod 113 is fixedly connected to the movable groove wall 112, and one end of the folding rod 114 has a rotating cylinder, which can be engaged with the arc groove 111 and abutted with the inclined guide rod 113 by rotation. When the slide 13 slides along the slide rail 12 away from the cable 3 , the arc groove 111 squeezes the folding rod 114 , causing the folding rod 114 to rotate against the elastic force of the torsion spring 116 , thereby overcoming the elastic member and causing the block 18 to slide along the shaft 14 away from the rotary head 15 .

[0028] The end of the rotary head 15 away from the slide 13 is coaxially connected to the center shaft 117 for coaxial rotation, and the center shaft 117 is coaxially connected to a gear 118 for coaxial rotation. A ratchet 119 is coaxially embedded on the gear 118, and a pawl 120 is elastically hinged on the center shaft 117, that is, the pawl 120 is rotationally connected to the center shaft 117 and is provided with a torsion spring or a tension spring. The pawl 120 is unidirectionally engaged with the ratchet 119, and a rack 121 is fixedly connected to the rotating frame 11. The slide 13 has a first stroke and a second stroke during the sliding process along the slide rail 12. In the first stroke, forward and reverse sliding can realize feeding and retracting of the tool, and in the second stroke, forward and reverse sliding can drive the gear 118 to engage with the rack 121 to realize switching of the tool 16.

[0029] In this embodiment, when preparing samples of multiple cables of the same type, the cutter 16 does not need to be switched. The carriage 13 reciprocates along the guide rail 12 during the first stroke to achieve advance and retract. That is, the cutter 16 approaches the cable 3 to perform rotary cutting and sample preparation, and moves away from the cable 3 to change the clamped cable 3. When preparing samples of different types of cables, the drive assembly first drives the carriage 13 along the guide rail 12 for the first stroke to retract the cutter 16 from the currently prepared cable 3. During this period, although the clamping block 18 compresses the folding rod 114 through the arcuate groove 111, causing the folding rod 114 to rotate slightly against the torsion spring 116, and the folding rod 114 causes the clamping block 18 to slide slightly along the shaft 14 away from the rotary head 15, due to the depth of both the clamping block 18 and the clamping slot 17, the clamping block 18 cannot completely slide out of the clamping slot 17. Therefore, during the first stroke, the clamping block 18 and the clamping slot 17 remain engaged, that is, the clamping block 18 is always in the locked position.

[0030] Then, the driving assembly continues to drive the slide 13 to move the second stroke along the slide rail 12 so that the rotary head 15 is further away from the cable 3. During this period, the clamping block 18 is first completely disengaged from the clamping groove 17, that is, the clamping block 18 is out of the locking position. Figure 6 , the gear 118 and the rack 121 begin to mesh and cooperate, so that the gear 118 and the ratchet 119 rotate forwardly along the central axis 117, the ratchet 119 and the pawl 120 engage and cooperate to make the central axis 117 rotate, and the central axis 117 drives the rotary head 15 to rotate to switch the tool 16, so that the other tool 16 rotates to the position aligned with the cable 3. At this time, the gear 118 completely passes the rack 121, and the gear 118 is disengaged from the meshing with the rack 121. The gear 118, the ratchet 119, the central axis 117, the rotary head 15 and the various tools 16 no longer rotate; the driving assembly then drives the slide 13 to move a short distance in the direction away from the cable 3, so that the arc groove 111 continues to squeeze the folding rod 114 until the elastic member recovers its deformation and the card block 18 is locked into the card groove 17 corresponding to the tool 16 aligned with the cable 3 at this time, that is, the card block 18 is reset to the locking position again, but the card groove 17 engaged with the card block 18 has changed, such as Figure 7 .

[0031] Then the driving assembly starts to drive the slide 13 to slide the second stroke in the direction close to the cable 3. The block 18 is always kept in the locking position under the elastic force of the elastic member. The gear 118 and the rack 121 are meshed with each other in the opposite direction again. The gear 118 and the ratchet 119 are reversed. The ratchet 119 and the pawl 120 slip and rotate idly, so the central shaft 117 and the rotary head 15 are not driven to rotate. Moreover, the folding rod 114 can be disengaged from the arc groove 111 to avoid pushing the block 18 out of the locking position. After the folding rod 114 is disengaged from the arc groove 111, it abuts against the inclined guide rod 113. Therefore, the turret 15 is locked during the return stroke of the second stroke and will not be driven to rotate by the gear 118 and rack 121. Therefore, when the slide 13 moves to the junction of the second stroke and the first stroke, the tool 16 can remain in the state of successful switching, and the folding rod 114 will overcome the elastic force of the second compression spring 115 under the elastic force of the torsion spring 116 to squeeze the inclined guide rod 113 and the movable groove wall 112, as shown in FIG. Figure 8 , so that the folding rod 114 can rotate and return to the arc groove 111. When the folding rod 114 enters the arc groove 111, the elastic force of the second compression spring 115 is released, causing the movable groove wall 112 to rebound to the groove wall state of filling the arc groove 111.

[0032] In the above process, after the cutter 16 is retracted from the sample cable 3, the currently sampled cable 3 needs to be removed from the clamping mechanism, and another type of cable 3 to be sampled needs to be clamped on the clamping mechanism.

[0033] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A tool feeding mechanism, comprising a rotating frame, characterized in that: Also includes: A slide, which is slidably connected to the rotating frame in a direction perpendicular to the axial direction of the cable, and a shaft parallel to the axial direction of the cable is fixedly connected to the slide; A rotating head is coaxially connected to the shaft, and is provided with a plurality of cutting tools and a plurality of slots distributed in a circular array, wherein each slot corresponds to each cutting tool one by one; A locking assembly, comprising a clamping block slidably connected to the shaft rod, wherein the clamping block has a locking position that is engaged with any clamping groove during the sliding stroke of the clamping block along the shaft rod; During operation, the card block is driven to slide out of the locking position, and after the rotary head is rotated to align the required tool with the cable, the card block slides to the locking position. During the rotation of the rotating frame, the slide slides close to the cable so that the tool aligned with the cable can peel and cut the outer skin of the cable.

2. A tool feeding mechanism according to claim 1, characterized in that: An elastic member is arranged between the slide and the clamping block, and the process of the elastic member restoring its deformation drives the clamping block to move to the locking position.

3. A tool feeding mechanism according to claim 2, characterized in that: The elastic member comprises a first compression spring sleeved on the shaft rod, one end of the first compression spring abuts against the clamping block, and the other end abuts against the sliding bracket.

4. A tool feeding mechanism according to claim 2, characterized in that: The block is provided with an arc groove, which has a movable groove wall elastically slidably connected to the block, an inclined guide rod fixedly connected to the movable groove wall, and a folding rod elastically rotatably connected to the rotating frame, one end of the folding rod can be engaged with the arc groove.

5. A tool feeding mechanism according to claim 4, characterized in that: A second compression spring is arranged between the movable groove wall and the clamping block, one end of the second compression spring abuts against the clamping block, and the other end abuts against the movable groove wall.

6. A tool feeding mechanism according to claim 4, characterized in that: A torsion spring is sleeved on the rotating shaft between the folding rod and the rotating frame, one end of the torsion spring is connected to the folding rod, and the other end is connected to the rotating frame.

7. A tool feeding mechanism according to claim 4, characterized in that: The rotating head is coaxially connected to a central shaft, the central shaft is coaxially connected to a gear, the gear is coaxially embedded with a ratchet, a pawl is elastically hinged on the central shaft, the pawl and the ratchet are unidirectionally engaged, a rack is fixedly connected to the rotating frame, and the gear and the rack can be driven to engage during the sliding process of the slide.

8. A tool feeding mechanism according to claim 1, characterized in that: The rotating frame is rotatably connected with a screw rod, the length direction of the screw rod is consistent with the sliding direction of the slide on the rotating frame, the screw rod is driven to rotate by a reduction motor installed on the rotating frame, and the slide is fixedly connected with a screw sleeve, which is threadedly connected to the screw rod.

9. A tool feeding mechanism according to claim 1, characterized in that: There are three knives, namely a knife for cutting the soft outer skin of the cable, a knife for cutting the metal armor layer of the cable, and a knife for cutting the cable core.

10. A cable sample preparation tool, characterized in that: It includes a tool seat body, a movable seat, a tool feeding mechanism and two clamping mechanisms for clamping cables. The movable seat is arranged on the tool seat body for axial movement along the cable. The rotating frame seat of the tool feeding mechanism is rotatably connected to the movable seat and arranged between the two clamping mechanisms. The tool feeding mechanism is a tool feeding mechanism as described in any one of claims 1 to 9.

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