Aluminum alloy cable and cable stripping device thereof

Abstract

The invention discloses an aluminum alloy cable and a cable stripping device thereof, and relates to the technical field of cables, the aluminum alloy cable stripping device comprises a stripping machine, a stripping seat and a conveyor, the stripping seat and the conveyor are mounted on the inner side of the stripping machine, a fixing ring is mounted on the inner side of the stripping seat, and a cable body is conveyed to the inner side of the fixing ring through the conveyor. Through cooperation of parts such as the hobs, the three hobs are arranged in a'shallow layer-middle layer-final 'stepped mode, a traditional single-time cutting mode is abandoned, and through a step-by-step progressive stripping mode, skin tearing caused by too large single-time stripping thickness is avoided. The layered cutting enables each hob to only undertake the stripping task of the corresponding layer, the cutting force is more uniform, the problem of skin residue adhesion is avoided, the deformation of an internal aluminum core due to excessive instant stress is avoided, the frictional resistance between the hob and the cable skin is reduced, the equipment loss is reduced, the stripping notch is smoother and more regular, and the service life of the cable is prolonged. Therefore, the peeling effect is improved.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to an aluminum alloy cable and its stripping device. Background Technology

[0002] As a mature, high-tech, environmentally friendly, and energy-saving power cable, aluminum alloy cables require specialized stripping equipment as a key step in their recycling process.

[0003] Existing aluminum alloy cable stripping devices generally adopt a single-cut or non-layered stripping design, which has obvious technical shortcomings: if the single stripping thickness is too large, it is easy to cause the cable sheath to tear, and the internal aluminum core will deform due to uneven stress; if the cutting force is not properly controlled, problems such as sheath residue and adhesion are likely to occur, making it difficult to achieve the dual goals of "complete stripping of the outer sheath" and "intact protection of the internal core". To address these issues, we provide an aluminum alloy cable and its stripping device to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an aluminum alloy cable and a cable stripping device thereof to solve the problem.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an aluminum alloy cable, comprising: a cable body consisting of a core, a shielding layer, a fireproof layer, and a plastic sheath, wherein the shielding layer is extruded onto the outer wall of the core, the fireproof layer is extruded onto the outer wall of the shielding layer, and the plastic sheath is extruded onto the plastic sheath.

[0006] As a further embodiment of the present invention: the shielding layer and the fireproof layer are wavy.

[0007] To adapt to the aforementioned aluminum alloy cable, the present invention also proposes an aluminum alloy cable stripping device, comprising the following structure:

[0008] A stripping machine, a stripping seat and a conveyor installed inside the stripping machine, wherein a fixing ring is installed inside the stripping seat, and the cable body is transported to the inside of the fixing ring by the conveyor;

[0009] The roller cutter is provided in four sets, which are evenly distributed around the inner side of the fixing ring. The roller cutter is used to strip the cable body.

[0010] Each set of the roller cutters has three roller cutters arranged in a stepped manner, which are used to gradually strip the outer skin of the cable body.

[0011] An adjustment aid, located between the fixing ring and each set of the hobs, is used to adjust the position of the hobs.

[0012] As a further embodiment of the present invention: a fixed frame is provided on the outer side of each auxiliary ring, each hob is rotatably connected to the hob through a rotating shaft, a servo motor is installed on one side of one of the fixed frames, and the output end of the servo motor is fixedly connected to the hob, and a synchronous drive assembly for synchronously driving the three hobs is provided on one side of a set of fixed frames.

[0013] As a further embodiment of the present invention: the synchronous drive assembly includes an L-shaped seat fixedly connected to one side of one of the fixed frames, an auxiliary wheel is provided on one side of the L-shaped seat, a synchronous wheel is fixedly connected to one side of each of the rotating shafts extending through to the outside of the fixed frame, a synchronous belt is installed between the three synchronous wheels and one auxiliary wheel, and an auxiliary adjustment unit for adjusting the tension of the synchronous belt is provided between the L-shaped seat and the auxiliary wheel.

[0014] As a further embodiment of the present invention: the auxiliary adjustment unit includes a slider slidably connected to the inner side of the L-shaped seat, an auxiliary wheel rotatably connected to one side of the slider, an electric push rod installed on the top of the L-shaped seat, and one end of the electric push rod passing through the inner side of the L-shaped seat and fixedly connected to the slider.

[0015] As a further embodiment of the present invention: the adjustment aid includes four suspension seats fixedly connected to the inner side of the fixed ring, one end of each suspension seat is fixedly connected to an adjustment seat, the inner side of the adjustment seat is rotatably connected to a transmission rod, the outer wall of the transmission rod is threaded with three adjustment rods, and each adjustment rod is fixedly connected to one of the fixed frames, and the three adjustment rods are slidably connected to the inner side of the adjustment seat.

[0016] As a further embodiment of the present invention: the outer side of the transmission rod is provided with three threaded grooves with different pitches, and the pitches of the three threaded grooves with different pitches decrease in an arithmetic sequence from top to bottom, and the three adjusting rods are respectively threadedly connected to one threaded groove.

[0017] As a further embodiment of the present invention: each of the hobs is provided with an arched blade on one side, and the arched blade is flush with the bottom of the hob. The arched curvature of the front end of the three arched blades increases from right to left. Each arched blade is fixedly connected to an adjusting rod by a suspension rod.

[0018] As a further embodiment of the present invention: the adjustment aid further includes an auxiliary ring fixedly connected to the outer wall of the fixed ring, a bevel gear ring rotatably connected to the inner side of the auxiliary ring, four suspension shafts rotatably connected to the inner side of the fixed ring, one end of each suspension shaft passing through to the outside of the fixed ring and fixedly connected to a bevel gear, and each bevel gear meshing with the bevel gear ring, an auxiliary seat fixedly connected to one side of the auxiliary ring, a drive motor fixedly connected to the top of the auxiliary seat, and the output end of the drive motor passing through to the outside of the auxiliary seat and fixedly connected to one of the suspension shafts, a first spur gear fixedly connected to the bottom of the suspension shaft, and a second spur gear meshing with the first spur gear fixedly connected to the top of the transmission rod.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. By coordinating components such as the roller cutters, the three roller cutters are arranged in a stepped manner, from shallow to medium to final layer, abandoning the traditional single-cut mode. This progressive peeling method avoids tearing of the outer sheath caused by excessive thickness in a single peel. Layered cutting allows each roller cutter to handle only its corresponding layer, resulting in more uniform cutting force. This eliminates the problem of residual outer sheath adhesion and prevents deformation of the internal aluminum core due to excessive instantaneous force. It also reduces frictional resistance between the roller cutters and the cable sheath, lowering equipment wear and resulting in a smoother and more regular peeling cut, thus improving the peeling effect.

[0021] 2. By setting up a fixed frame and other parts, when peeling is required, the servo motor on one side of one of the fixed frames is started. The servo motor drives a roller to rotate, which in turn drives a synchronous pulley to rotate through the rotating shaft. In turn, the synchronous belt drives other synchronous pulleys to drive a roller to rotate synchronously, so that the three rollers rotate synchronously to perform the peeling operation. There is no need to use multiple servo motors to drive them, which improves the overall practicality of the device.

[0022] 3. By using bevel gears and other components, when the position of each set of roller cutters needs to be adjusted, the drive motor is started. The output of the drive motor drives a suspension shaft to rotate a bevel gear, which in turn drives the bevel gear ring to rotate. This, in turn, drives other bevel gears to rotate a suspension shaft. The rotation of the suspension shaft drives the transmission rod to rotate through the meshing of the first and second spur gears, thereby adjusting the position of the three roller cutters. Because the transmission rod has three threaded grooves with different pitches on its outer side, and the pitches of the three threaded grooves decrease in an arithmetic progression from top to bottom, the displacement of the three adjusting rods changes by a fixed difference during the adjustment process. This ensures that the roller cutters always maintain a stepped spacing of "shallow layer - middle layer - final layer" during the up and down adjustment process, preventing the layer cutting thickness from becoming unbalanced due to position adjustment. This ensures that the amount of each layer stripped is uniform and controllable regardless of the cable sheath thickness. The roller cutter position can be flexibly adjusted, and with the decreasing pitch design, it can adapt to aluminum alloy cables of different diameters and sheath thicknesses. No need to replace the roller cutter or adjust the equipment structure; precise adjustment can be achieved simply by driving the motor. It is easy to operate and has a small error, solving the problems of poor adaptability and cumbersome adjustment of traditional devices.

[0023] 4. By setting up auxiliary wheels and other parts, when the three rollers are adjusted downwards or upwards, the electric push rod is started synchronously by the PLC controller, thereby driving the auxiliary wheels to adjust upwards or downwards, forming traction on the timing belt, so that the tension of the timing belt remains constant during the position adjustment of the three rollers. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the inner structure of the peeling seat of the present invention;

[0026] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 This is a sectional view of the fixing ring of the present invention;

[0028] Figure 5 For the present invention Figure 4 Enlarged view at point B in the middle;

[0029] Figure 6 This is a schematic diagram of the hobbing cutter structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the arched blade structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the L-shaped seat structure of the present invention;

[0032] Figure 9 This is a schematic diagram of the adjusting seat structure of the present invention;

[0033] Figure 10 This is a cross-sectional view of the cable body of the present invention.

[0034] In the diagram: 1. Stripping machine; 2. Stripping seat; 3. Conveyor; 4. Cable body; 5. Fixing ring; 6. Suspension seat; 7. Auxiliary ring; 8. Roller cutter; 9. Arched cutter; 10. Suspension shaft; 11. First spur gear; 12. Fixing frame; 13. Suspension rod; 14. Second spur gear; 15. Transmission rod; 16. Bevel gear; 17. Bevel gear ring; 18. Auxiliary seat; 19. Drive motor; 20. Adjusting seat; 21. Adjusting rod; 22. Rotating shaft; 23. Synchronous pulley; 24. Synchronous belt; 25. L-shaped seat; 26. Auxiliary pulley; 27. Slider; 28. Electric push rod; 29. ​​Battery cell; 30. Shielding layer; 31. Fireproof layer; 32. Plastic jacket. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0037] Example 1

[0038] Please see Figure 9 This embodiment provides an aluminum alloy cable, including: a cable body 4 consisting of a core 29, a shielding layer 30, a fireproof layer 31, and a plastic jacket 32. The shielding layer 30 is extruded onto the outer wall of the core 29, the fireproof layer 31 is extruded onto the outer wall of the shielding layer 30, and the plastic jacket 32 ​​is extruded onto the plastic jacket 32. The shielding layer 30 and the fireproof layer 31 are corrugated.

[0039] By extruding a shielding layer 30 and a fireproof layer 31 on the outside of the battery cell 29, the main purpose is to improve the fire resistance and electromagnetic shielding effect of the cable body 4 during use. At the same time, the gaps in the corrugated fireproof layer can form a "maze-like" barrier path, which will reduce the speed of flame and heat transfer and reduce the rapid spread of smoke along the cable. The corrugated metal shielding maintains complete coverage when bent, unlike flat foil which is prone to breakage or gaps at bends, thus ensuring high-frequency and low-frequency electromagnetic shielding.

[0040] Example 2

[0041] Please see Figures 1-9 This embodiment provides an aluminum alloy cable stripping device, including: a stripping machine 1, a stripping seat 2 installed inside the stripping machine 1, and a conveyor 3. A fixing ring 5 is installed inside the stripping seat 2, and the cable body 4 is conveyed to the inside of the fixing ring 5 by the conveyor 3; roller cutters 8, four sets of roller cutters 8 are arranged, and the four sets of roller cutters 8 are evenly distributed around the inside of the fixing ring 5, and the roller cutters 8 strip the cable body 4; each set of roller cutters 8 is provided with three roller cutters 8, and the three roller cutters 8 are arranged in a stepped manner for gradually stripping the outer side of the cable body 4; a fixing frame 12 is provided on the outer side of each auxiliary ring 7, and each roller cutter 8 is rotatably connected to the roller cutter 8 through a rotating shaft 22, one of the fixing frames A servo motor is installed on one side of the 12, and the output end of the servo motor is fixedly connected to the hob 8. A synchronous drive assembly for synchronously driving the three hobs 8 is provided on one side of a set of fixed frames 12. The synchronous drive assembly includes an L-shaped seat 25 fixedly connected to one side of one of the fixed frames 12. An auxiliary wheel 26 is provided on one side of the L-shaped seat 25. A synchronous wheel 23 is fixedly connected to one side of each rotating shaft 22 through to the outside of the fixed frame 12. A synchronous belt 24 is installed between the three synchronous wheels 23 and one auxiliary wheel 26. An arched blade 9 is provided on one side of each hob 8, and the arched blade 9 is flush with the bottom of the hob 8. The arched arc of the front end of the three arched blades 9 increases from right to left.

[0042] First, when the cable body 4 enters the inner side of the fixing ring 5, it is stripped by multiple rollers 8. Since the three rollers 8 are arranged in a stepped manner, the cable body 4 is stripped from the shallow layer to the middle layer and then to the final layer. At the same time, the arched blades 9 at the tail end of each roller 8 can support the stripped plastic shell of the cable body 4. The stepped arrangement of the three rollers 8, from the shallow layer to the middle layer and then to the final layer, avoids the outer sheath from tearing or the core from being deformed by stress due to excessive thickness in a single stripping. Layered stripping reduces the frictional resistance between the rollers 8 and the cable, reduces equipment wear, and makes the stripping cut smoother. At the same time, the arched blades 9 are flush with the bottom of the rollers 8, which can support the plastic shell that is not completely stripped during the stripping process, preventing the core from being pulled when the shell falls off. It also provides protection for the subsequent stripping by the rollers 8, preventing the plastic shell of the cable body 4 from sticking to the rollers 8 again due to its own elasticity during the subsequent stripping process, thus ensuring the stability of the stripping.

[0043] When peeling is required, the servo motor on one side of one of the fixed brackets 12 is activated. The servo motor drives a roller 8 to rotate, which in turn drives a synchronous pulley 23 to rotate through the rotating shaft 22. In turn, the synchronous belt 24 drives other synchronous pulleys 23 to drive the roller 8 to rotate synchronously. This allows the three rollers 8 to rotate synchronously for peeling, eliminating the need for multiple servo motors and improving the overall practicality of the device.

[0044] Please see Figures 1-9An adjustment auxiliary device, located between the fixed ring 5 and each set of hobs 8, is used to adjust the position of the hobs 8. The adjustment auxiliary device includes four suspension seats 6 fixedly connected to the inner side of the fixed ring 5. One end of each suspension seat 6 is fixedly connected to an adjustment seat 20. A transmission rod 15 is rotatably connected to the inner side of the adjustment seat 20. Three adjustment rods 21 are threadedly connected to the outer wall of the transmission rod 15, and each adjustment rod 21 is fixedly connected to a fixed frame 12. The three adjustment rods 21 are slidably connected to the inner side of the adjustment seat 20. The outer side of the transmission rod 15 is provided with three threaded grooves with different pitches. The pitches of the three threaded grooves decrease in an arithmetic progression from top to bottom. The three adjustment rods 21 are threadedly connected to one of the threaded grooves. Each arched cutter 9 is connected to a suspension rod 13. An adjusting rod 21 is fixedly connected. The adjusting auxiliary device also includes an auxiliary ring 7 fixedly connected to the outer wall of the fixed ring 5. A bevel gear ring 17 is rotatably connected to the inner side of the auxiliary ring 7. Four suspension shafts 10 are rotatably connected to the inner side of the fixed ring 5. One end of each suspension shaft 10 passes through to the outside of the fixed ring 5 and is fixedly connected to a bevel gear 16. Each bevel gear 16 is meshed with the bevel gear ring 17. An auxiliary seat 18 is fixedly connected to one side of the auxiliary ring 7. A drive motor 19 is fixedly connected to the top of the auxiliary seat 18. The output end of the drive motor 19 passes through to the outside of the auxiliary seat 18 and is fixedly connected to a suspension shaft 10. A first spur gear 11 is fixedly connected to the bottom of the suspension shaft 10. A second spur gear 14 that meshes with the first spur gear 11 is fixedly connected to the top of the transmission rod 15.

[0045] When the position of each set of hobs 8 needs to be adjusted, the drive motor 19 is started. The output of the drive motor 19 drives a suspension shaft 10 to rotate a bevel gear 16, which in turn drives the bevel gear ring 17 to rotate. This, in turn, drives the other bevel gears 16 to rotate a suspension shaft 10. The rotation of the suspension shaft 10 drives the transmission rod 15 to rotate through the meshing of the first spur gear 11 and the second spur gear 14, thereby adjusting the position of the three hobs 8. Since the transmission rod 15 has three threaded grooves with different pitches on its outer side, and the three... The pitch of each thread groove with a different pitch decreases in an arithmetic progression from top to bottom. This ensures that the displacement of the three adjusting rods 21 changes by a fixed difference during adjustment. This allows the roller cutter to maintain a stepped spacing of "shallow-middle-final" during the up-and-down adjustment process, preventing imbalances in the layer cutting thickness due to position adjustments. This ensures that the amount of material stripped from each layer is uniform and controllable regardless of the cable sheath thickness. The roller cutter position is flexibly adjustable, and combined with the decreasing pitch design, it can adapt to aluminum alloy cables of different diameters and sheath thicknesses. No roller cutter replacement or equipment structure adjustment is required; precise adjustment can be achieved solely through the drive motor. Operation is convenient and error-free, solving the problems of poor adaptability and cumbersome adjustment associated with traditional devices.

[0046] When the three rollers 8 are adjusted downwards or upwards, the electric push rod 28 is started synchronously by the PLC controller, thereby driving the auxiliary wheel 26 to adjust upwards or downwards, forming traction on the timing belt 24, so that the tension of the timing belt 24 remains constant during the position adjustment of the three rollers 8.

[0047] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An aluminum alloy cable, characterized in that, include: The cable body (4) consists of a battery core (29), a shielding layer (30), a fireproof layer (31), and a plastic jacket (32). The shielding layer (30) is extruded onto the outer wall of the battery core (29), the fireproof layer (31) is extruded onto the outer wall of the shielding layer (30), and the plastic jacket (32) is extruded onto the plastic jacket (32).

2. The aluminum alloy cable according to claim 1, characterized in that, The shielding layer (30) and the fireproof layer (31) are wavy.

3. An aluminum alloy cable stripping device, characterized in that, include: A stripping machine (1) and a stripping seat (2) and a conveyor (3) installed inside the stripping machine (1), wherein a fixing ring (5) is installed inside the stripping seat (2), and the cable body (4) is conveyed to the inside of the fixing ring (5) by the conveyor (3); The roller cutter (8) is provided in four sets. The four sets of roller cutters (8) are evenly distributed around the inner side of the fixing ring (5) and the cable body (4) is stripped by the roller cutter (8). Each set of the roller cutters (8) is provided with three, and the three roller cutters (8) are arranged in a stepped manner to gradually strip the outer side of the cable body (4); An adjustment aid, located between the fixed ring (5) and each set of the hobs (8), is used to adjust the position of the hobs (8).

4. The aluminum alloy cable stripping device according to claim 3, characterized in that, Each auxiliary ring (7) is provided with a fixed frame (12) on its outer side. Each hob (8) is rotatably connected to the hob (8) through a rotating shaft (22). A servo motor is installed on one side of one of the fixed frames (12), and the output end of the servo motor is fixedly connected to the hob (8). A synchronous drive assembly for synchronously driving the three hobs (8) is provided on one side of a set of fixed frames (12).

5. The aluminum alloy cable stripping device according to claim 4, characterized in that, The synchronous drive assembly includes an L-shaped seat (25) fixedly connected to one side of one of the fixed frames (12). An auxiliary wheel (26) is provided on one side of the L-shaped seat (25). A synchronous wheel (23) is fixedly connected to one side of each rotating shaft (22) extending to the outside of the fixed frame (12). A synchronous belt (24) is installed between the three synchronous wheels (23) and one auxiliary wheel (26). An auxiliary adjustment unit for adjusting the tension of the synchronous belt (24) is provided between the L-shaped seat (25) and the auxiliary wheel (26).

6. The aluminum alloy cable stripping device according to claim 5, characterized in that, The auxiliary adjustment unit includes a slider (27) slidably connected to the inside of the L-shaped seat (25), an auxiliary wheel (26) rotatably connected to one side of the slider (27), an electric push rod (28) is installed on the top of the L-shaped seat (25), and one end of the electric push rod (28) passes through the inside of the L-shaped seat (25) and is fixedly connected to the slider (27).

7. The aluminum alloy cable stripping device according to claim 6, characterized in that, The adjustment aid includes four suspension seats (6) fixedly connected to the inner side of the fixed ring (5). Each suspension seat (6) has an adjustment seat (20) fixedly connected to one end. The inner side of the adjustment seat (20) is rotatably connected to a transmission rod (15). The outer wall of the transmission rod (15) is threaded with three adjustment rods (21). Each adjustment rod (21) is fixedly connected to one of the fixed frames (12). The three adjustment rods (21) are slidably connected to the inner side of the adjustment seat (20).

8. The aluminum alloy cable stripping device according to claim 7, characterized in that, The transmission rod (15) has three threaded grooves with different pitches on its outer side. The pitches of the three threaded grooves decrease in an arithmetic sequence from top to bottom. The three adjusting rods (21) are threadedly connected to one threaded groove.

9. The aluminum alloy cable stripping device according to claim 7, characterized in that, Each of the roller cutters (8) has an arched cutter (9) on one side, and the arched cutter (9) is flush with the bottom of the roller cutter (8). The arched arc of the front end of the three arched cutters (9) increases from right to left. Each arched cutter (9) is fixedly connected to an adjusting rod (21) through a suspension rod (13).

10. The aluminum alloy cable stripping device according to claim 7, characterized in that, The adjustment aid also includes an auxiliary ring (7) fixedly connected to the outer wall of the fixed ring (5). A bevel gear ring (17) is rotatably connected to the inner side of the auxiliary ring (7). Four suspension shafts (10) are rotatably connected to the inner side of the fixed ring (5). One end of each suspension shaft (10) passes through to the outside of the fixed ring (5) and is fixedly connected to a bevel gear (16). Each bevel gear (16) meshes with the bevel gear ring (17). An auxiliary seat (18) is fixedly connected to one side of the auxiliary ring (7). A drive motor (19) is fixedly connected to the top of the auxiliary seat (18). The output end of the drive motor (19) passes through to the outside of the auxiliary seat (18) and is fixedly connected to one of the suspension shafts (10). A first spur gear (11) is fixedly connected to the bottom of the suspension shaft (10). A second spur gear (14) meshes with the first spur gear (11) is fixedly connected to the top of the transmission rod (15).

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