Auxiliary tool for electrical equipment installation

Abstract

The utility model provides an auxiliary tool for electrical equipment installation, which comprises a supporting seat, a limiting wheel, a peeling knife and a driving assembly, and is characterized in that the top of the supporting seat is provided with a through groove; the limiting wheel is arranged at the bottom of the supporting base and corresponds to the through groove in position. The peeling knife is arranged in the through groove and abuts against an adjusting screw arranged on the supporting base so as to fix the distance between the peeling knife and the limiting wheel, and the knife edge of the peeling knife faces the limiting wheel. The driving assembly is arranged on the same side of the limiting wheel and the peeling knife and pulls the cable penetrating through the limiting wheel and the peeling knife to move. According to the utility model, the cable passes through the limiting wheel and the skinning knife and passes through the driving assembly, and the cable is clamped and pulled between the two rollers of the driving assembly to move between the limiting wheel and the skinning knife so as to realize skinning, so that the problem that time and labor are wasted when the cable is manually pulled to enable the skinning knife to strip the outer skin is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical installation, in particular to an auxiliary tool for installing electrical equipment. Background Art

[0002] The outer skin of a cable is usually composed of an insulating material and a protective layer. The outer skin is to protect the insulating layer inside the cable from damage. Once the insulating layer is damaged, problems such as cable short - circuit or leakage may occur. When connecting cables, it is necessary to strip off the outer skin to expose the internal wires for convenient wiring and connection. Therefore, when wiring, it is necessary to strip off the outer skin to ensure the integrity of the insulating layer. The outer skin of the cable usually also has certain insulating properties. Stripping off the outer skin can reduce the influence of the insulating layer, improve the electrical conductivity of the cable, and also make it easier to maintain and repair the cable, locate faults and perform repairs.

[0003] During the cable laying process, sometimes it is necessary to strip off the outer skin of the cable to expose the internal wires for easy wiring. Usually, a wire stripper is used for stripping. However, when using a wire stripper, it is necessary to first make a cut with a peeling knife, and then manually pull the cable to make the peeling knife cut through the outer skin for easy stripping. Pulling the cable in this way is time - consuming and laborious.

[0004] It should be noted that the information disclosed in the above background art section is only used to strengthen the understanding of the background of the utility model and does not constitute any limitation to the utility model. Summary of the Utility Model

[0005] In view of the above - mentioned disadvantages of the prior art, the utility model provides an auxiliary tool for installing electrical equipment. By passing the cable through the limiting wheel and the peeling knife and then through the driving component, and using the clamping and traction of the cable between the two rollers of the driving component to move between the limiting wheel and the peeling knife for peeling, the problem of time - consuming and laborious peeling of the outer skin by manually pulling the cable with a peeling knife is solved.

[0006] The utility model provides an auxiliary tool for installing electrical equipment, including a support base, a limiting wheel, a peeling knife, and a driving component. A through - groove is opened at the top of the support base; the limiting wheel is installed at the bottom of the support base and corresponds to the position of the through - groove; the peeling knife is installed in the through - groove and abuts against an adjusting screw installed on the support base to fix the distance from the limiting wheel, and the cutting edge of the peeling knife faces the limiting wheel; the driving component is installed on the same side of the limiting wheel and the peeling knife and pulls the cable passing between the limiting wheel and the peeling knife to move.

[0007] In an embodiment of the present utility model, the driving assembly includes a first mounting frame, a second mounting frame, a driving member, and a linkage member. The first mounting frame is installed at the bottom of the support seat and corresponds to the positions of the limiting wheel and the peeling knife, and a first roller and a second roller are installed in the first mounting frame; the second mounting frame is installed at the bottom of the support seat and is located on the same side of the limiting wheel, the peeling knife, and the first mounting frame, and is arranged adjacent to the first mounting frame; the driving member and the linkage member that are in transmission connection are installed on the second mounting frame, and the linkage member is respectively connected to the axles of the first roller and the second roller.

[0008] In an embodiment of the present utility model, the linkage member includes a transmission rod and a gear set. The transmission rod is rotatably installed in the second mounting frame and is fixedly connected to the output shaft of the driving member; the gear set is respectively installed on the transmission rod and the axles of the first roller and the second roller, and the gear set on the transmission rod meshes with the gear sets on the axles of the first roller and the second roller for transmission, and makes the rotation directions of the first roller and the second roller opposite.

[0009] In an embodiment of the present utility model, the first roller and the limiting wheel are at the same height of the support seat, the second roller is located above the first roller, and the mounting frame is provided with a limiting groove at the position where the axle of the first roller is installed, so that the distance between the first roller and the second roller can be changed.

[0010] In an embodiment of the present utility model, the top end of the second mounting frame extends above the first mounting frame, a U-shaped plate is installed on the top of the first mounting frame, the top of the U-shaped plate is slidably installed on the second mounting frame, and both ends of the bottom of the U-shaped plate are rotatably connected to the axle of the second roller.

[0011] In an embodiment of the present utility model, a sleeve with a keyway is further installed on the transmission rod, the sleeve is fixedly connected to the gear set on the transmission rod corresponding to the second roller, and the sleeve is installed on the key of the transmission rod through its keyway.

[0012] In an embodiment of the present utility model, a connecting ring is further fixedly connected to the upper end of the sleeve, the connecting ring is sleeved on the transmission rod and is fixedly connected to the U-shaped plate.

[0013] In an embodiment of the present utility model, the top of the U-shaped plate is threadedly connected to the second mounting frame through a screw, and a rotating wheel is installed on the part of the screw protruding from the second mounting frame.

[0014] In an embodiment of the present utility model, a guiding wheel is further installed at the bottom of the support seat, and the guiding wheel and the driving assembly are respectively located on both sides of the limiting wheel.

[0015] In an embodiment of the present utility model, fixing screws are arranged at both ends of the bottom of the support seat.

[0016] In an embodiment of the present utility model, the top of the peeling knife protrudes from the through groove of the support seat. A scale is provided on the surface of the peeling knife facing the adjusting screw, and the reading of the scale on the end face protruding from the support seat corresponds to the distance between the cutting edge of the peeling knife and the limiting wheel.

[0017] The beneficial effects of the present utility model at least include:

[0018] 1. An auxiliary tool for installing electrical equipment provided by the present utility model. By providing a limiting wheel, a peeling knife, and a driving component on the support seat, and using the driving component to pull the cable to move between the limiting wheel and the peeling knife, it is not only more labor-saving but also can quickly pull the cable, enabling the peeling knife to quickly cut the outer skin of the cable, with higher efficiency.

[0019] 2. By installing a U-shaped plate in the mounting frame one of the driving component, and cooperating with a sleeve, a key, a connecting ring, and an adjusting screw installed on the mounting frame two of the driving component, the distance between the roller one and the roller two in the mounting frame one can be adjusted to adapt to pulling cables of different specifications, achieving the purpose of flexible adjustment.

[0020] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present utility model. Description of the Drawings

[0021] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments in line with the present utility model, and are used together with the specification to explain the principles of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0022] Figure 1 is a three-dimensional structural schematic diagram of the auxiliary tool for installing electrical equipment of the present utility model;

[0023] Figure 2 is a three-dimensional structural schematic diagram of the driving component of the present utility model;

[0024] Figure 3 is a three-dimensional structural schematic diagram of the support seat component of the present utility model;

[0025] Figure 4 is a three-dimensional structural schematic diagram of the transmission rod component of the present utility model.

[0026] In the figure: 1, support base; 10, adjusting screw; 11, fixing screw; 2, limiting wheel; 21, guiding wheel; 3, peeling knife; 30, scale; 4, driving assembly; 41, mounting frame one; 410, limiting groove; 411, roller one; 412, roller two; 413, U-shaped plate; 414, screw rod; 415, runner; 42, mounting frame two; 43, driving member; 44, linkage member; 441, transmission rod; 4410, key; 442, gear set; 4421, bevel gear one; 4422, bevel gear two; 4423, bevel gear three; 4424, bevel gear four; 443, sleeve; 444, connecting ring. Specific embodiments

[0027] The following specific examples illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. It should also be understood that the terms used in the embodiments of the present utility model are for describing specific implementation manners and are not intended to limit the protection scope of the present utility model.

[0028] Please refer to Figures 1 to 4 It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not intended to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as the positions and quantity relationships cited in this specification are only for the convenience of clear narration and are not intended to limit the scope under which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present utility model can be implemented.

[0029] Please refer to Figures 1 to 4, the present utility model provides an auxiliary tool for installing electrical equipment, which includes a support base 1, a limiting wheel 2, a stripping knife 3 and a driving component 4. A through groove is formed at the top of the support base 1; the limiting wheel 2 is installed at the bottom of the support base 1 and corresponds to the position of the through groove; the stripping knife 3 is installed in the through groove and abuts against an adjusting screw 10 installed on the support base 1 to fix the distance from the limiting wheel 2, and the cutting edge of the stripping knife 3 faces the limiting wheel 2; the driving component 4 is installed on the same side of the limiting wheel 2 and the stripping knife 3, and pulls the cable passing between the limiting wheel 2 and the stripping knife 3 to move.

[0030] Further, please refer to Figure 2 , the driving component 4 includes a first mounting frame 41, a second mounting frame 42, a driving member 43 and a linkage member 44. The first mounting frame 41 is installed at the bottom of the support base 1 and corresponds to the positions of the limiting wheel 2 and the stripping knife 3, and a first roller 411 and a second roller 412 are installed in the first mounting frame 41; the second mounting frame 42 is installed at the bottom of the support base 1 and is located on the same side of the limiting wheel 2, the stripping knife 3 and the first mounting frame 41, and is arranged adjacent to the first mounting frame 41; the driving member 43 and the linkage member 44 which are in transmission connection are installed on the second mounting frame 42, and the linkage member 44 is respectively connected to the axles of the first roller 411 and the second roller 412.

[0031] Specifically, in the embodiment of the present utility model, the driving component 4 can be driven by a motor or manually. As shown in the appendix Figure 1 , in this embodiment, motor drive is adopted to achieve a more labor-saving effect. When in use, first fix the support base 1 at a certain position, then place the cable on the axle of the limiting wheel 2, and place the end between the axles of the first roller 411 and the second roller 412 in the driving component 4. Then adjust the height of the stripping knife 3 so that it can strip the outer skin of the cable without scratching the internal wires of the cable. After adjusting to a suitable position, tighten the adjusting screw 10 to fix the height of the stripping knife 3. Then start the motor, drive the first roller 411 and the second roller 412 to rotate towards each other through the linkage member 44, apply a force to the cable to drive the cable to move between the first roller 411 and the second roller 412. When the cable moves, the stripping knife 3 will strip all the outer skin of the cable, thereby improving the stripping efficiency of the cable outer skin and being more labor-saving.

[0032] Please refer to Figure 2 , in an embodiment, the linkage member 44 includes a transmission rod 441 and a gear set 442. The transmission rod 441 is rotatably installed in the second mounting frame 42 and is fixedly connected to the output shaft of the driving member 43; the gear set 442 is respectively installed on the transmission rod 441, the axles of the first roller 411 and the second roller 412, and the gear set 442 on the transmission rod 441 meshes with the gear sets 442 on the axles of the first roller 411 and the second roller 412 for transmission, and makes the rotation directions of the first roller 411 and the second roller 412 opposite.

[0033] Specifically, in the embodiment of the present utility model, after starting the motor, the output shaft of the motor rotates to drive the transmission rod 441 to rotate, and when the transmission rod 441 rotates, it drives the gear set 442 to rotate. Please refer to the attached Figure 2 As shown, the gear set 442 includes a bevel gear one 4421 and a bevel gear two 4422 respectively installed on the axles of the first roller 411 and the second roller 412, and a bevel gear three 4423 and a bevel gear four 4424 respectively installed on the transmission rod 441. The bevel gear three 4423 and the bevel gear four 4424 on the transmission rod 441 rotate. When the bevel gear three 4423 rotates, it drives the meshing bevel gear one 4421 to rotate. When the bevel gear one 4421 rotates, it drives the axle of the first roller 411 to rotate and simultaneously drives the first roller 411 to rotate. When the bevel gear four 4424 rotates, it drives the meshing bevel gear two 4422 to rotate. When the bevel gear two 4422 rotates, it drives the axle of the second roller 412 to rotate and simultaneously drives the second roller 412 to rotate, and can drive the first roller 411 and the second roller 412 to rotate towards each other simultaneously.

[0034] Furthermore, the first roller 411 and the limiting wheel 2 are at the same height of the support base 1. The second roller 412 is located above the first roller 411, and the mounting frame is provided with a limiting groove 410 at the axle of the first roller 411, so that the first roller 411 can change the distance from the second roller 412.

[0035] Please refer to Figure 2 , when the cable is at the axles of the first roller 411 and the limiting wheel 2, the cable is in a horizontal position, which is convenient for pulling. And when moving the second roller 412, its axle slides in the limiting groove 410. In this way, the friction force formed by the gravity of the second roller 412 acting on the cable makes the distance between the second roller 412 and the first roller 411 adapt to the wire diameter of the cable and traction the cable to move.

[0036] Even further, the top end of the second mounting frame 42 extends above the first mounting frame 41. The top of the first mounting frame 41 is provided with a U-shaped plate 413, and the top of the U-shaped plate 413 is slidably mounted on the second mounting frame 42. The two ends of the bottom of the U-shaped plate 413 are rotatably connected to the axles of the second roller 412.

[0037] Please refer to Figure 2 , when moving the U-shaped plate 413, the movement of the U-shaped plate 413 drives the second roller 412 and its axle to move simultaneously, and then changes the distance between the first roller 411 and the second roller 412 to adapt to cables of different diameter specifications. In this way, the increased gravity of the U-shaped plate 413 structure on the second roller 412 acts on the cable, further increasing the friction force formed with the cable, so that the distance between the second roller 412 and the first roller 411 adapts to the wire diameter of the cable and traction the cable to move.

[0038] Please refer to Figure 1 In one embodiment, a sleeve 443 with a keyway is further installed on the transmission rod 441. The sleeve 443 is fixedly connected to the gear set 442 corresponding to the second roller 412 on the transmission rod 441, and the sleeve 443 is installed on the key 4410 of the transmission rod 441 through its keyway.

[0039] Please refer to Figure 4 During adjustment, first slide the sleeve 443 on the key 4410 of the transmission rod 441, and drive the bevel gear four 4424 in the gear set 442 to slide along the transmission rod 441, so as to achieve the purpose of adjusting the position along with the second roller 412 and its axle.

[0040] Furthermore, a connecting ring 444 is fixedly connected to the upper end of the sleeve 443. The connecting ring 444 is sleeved on the transmission rod 441 and fixedly connected to the U-shaped plate 413.

[0041] Please refer to Figure 2 When the U-shaped plate 413 moves, it can drive the connecting ring 444 and the sleeve 443 to move together, so as to achieve the purpose of simultaneous adjustment.

[0042] Furthermore, the top of the U-shaped plate 413 is threadedly connected to the second mounting frame 42 through a screw 414, and a runner 415 is installed on the part of the screw 414 protruding from the second mounting frame 42.

[0043] Please refer to Figure 2 By rotating the runner 415 to adjust the screw 414, drive the U-shaped plate 413 to move, change the position of the U-shaped plate 413, and then change the position of the sleeve 443, so that the second roller 412 and its axle and the bevel gear two 4422 and the bevel gear four 4424 in the gear set 442 change positions simultaneously. In this way, the distance between the first roller 411 and the second roller 412 is adjusted to clamp the cable, replacing the friction force of the structure of the second roller 412 and the U-shaped plate 413 on the gravity of the cable to pull the cable to move.

[0044] Please refer to Figure 3 In one embodiment, a guide wheel 21 is further installed at the bottom of the support base 1. The guide wheel 21 and the drive assembly 4 are respectively located on both sides of the limiting wheel 2. In this way, the cable can always be located at the axle of the limiting wheel 2 through the guide wheel 21.

[0045] Furthermore, the top of the peeling knife 3 protrudes from the through groove of the support base 1. A scale 30 is arranged on the surface of the peeling knife 3 facing the adjusting screw 10, and the reading of the scale 30 on the end face protruding from the support base 1 corresponds to the distance between the cutting edge of the peeling knife 3 and the limiting wheel 2.

[0046] In this way, the distance between the cutting edge of the peeling knife 3 and the limiting wheel 2 can be directly obtained through the scale 30 protruding from the top end of the support base 1, that is, the peeling size which is the corresponding cable diameter size minus the outer skin size on one side.

[0047] Furthermore, fixing screws 11 are provided at both ends of the bottom of the support base 1. In this way, the support base 1 can be installed by means of detachable connections such as bolts and snap connections, which is convenient for disassembling this auxiliary tool.

[0048] To sum up, for an auxiliary tool for electrical equipment installation provided by the present utility model, during use, first place the support base 1 at a certain position and fix it through the fixing screws 11. Then place the cable on the axle of the limiting wheel 2, and place the end of the cable between the axles of the first roller 411 and the second roller 412. Adjust the height of the peeling knife 3 so that it can not only peel the outer skin of the cable but also not scratch the internal wires of the cable. After adjusting to a suitable position, tighten the adjusting screw 10 to fix the height of the peeling knife 3. Then place the cable at the axle of the first roller 411, rotate the adjusting screw rod 414 to drive the U-shaped plate 413 to move, change the position of the U-shaped plate 413. When the U-shaped plate 413 moves, it drives the second rotating shaft to slide in the limiting groove 410, so that the second rotating shaft and the second bevel gear 4422 move positions, and the axle of the second roller 412 is stuck outside the cable. When the U-shaped plate 413 moves, it drives the connecting plate to move together, and at the same time makes the connecting sleeve 443 slide on the outer wall of the convex block, driving the fourth bevel gear 4424 to slide along the transmission rod 441. During this process, the second bevel gear 4422 and the fourth bevel gear 4424 are in a meshing state, so as to adjust the distance between the first roller 411 and the second roller 412, so that the first roller 411 and the second roller 412 clamp the cable. Then start the motor, the output shaft of the motor rotates to drive the transmission rod 441 to rotate. When the transmission rod 441 rotates, it drives the third bevel gear 4423 and the fourth bevel gear 4424 to rotate. When the third bevel gear 4423 rotates, it drives the first bevel gear 4421 meshing with it to rotate. When the first bevel gear 4421 rotates, it drives the first rotating shaft to rotate, and at the same time drives the first roller 411 to rotate. When the fourth bevel gear 4424 rotates, it drives the second bevel gear 4422 meshing with it to rotate. When the second bevel gear 4422 rotates, it drives the second rotating shaft to rotate, and at the same time drives the second roller 412 to rotate, which can drive the first roller 411 and the second roller 412 to rotate towards each other at the same time, pull the cable, and at the same time the outer skin of the cable is peeled off by the peeling knife 3.

[0049] The above embodiments only illustratively explain the principle and its effects of the present utility model, rather than being used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. An auxiliary tool for installing electrical equipment, characterized in that: include: A support seat (1), wherein a through groove is formed on the top of the support seat (1); A limiting wheel (2), the limiting wheel (2) being mounted on the bottom of the supporting seat (1) and corresponding to the position of the through slot; a skinning knife (3), the skinning knife (3) being installed in the through slot and abutting against an adjusting screw (10) installed on the support seat (1) to fix the distance between the skinning knife (3) and the limiting wheel (2), and the blade of the skinning knife (3) is facing the limiting wheel (2); and A driving assembly (4), wherein the driving assembly (4) is installed on the same side of the limiting wheel (2) and the skinning knife (3), and pulls the cable passing between the limiting wheel (2) and the skinning knife (3) to move; The driving assembly (4) comprises a first mounting frame (41) and a second mounting frame (42); the first mounting frame (41) is provided with a first roller (411) and a second roller (412) which are linked via a gear set (442); and the second roller (412) is slidably connected to the second mounting frame (42) via a U-shaped plate (413).

2. The auxiliary tool according to claim 1, characterized in that: The driving assembly (4) comprises: A mounting frame (41), the mounting frame (41) being mounted at the bottom of the support seat (1) and corresponding to the positions of the limiting wheel (2) and the peeling knife (3), and a roller (411) and a roller (412) being mounted in the mounting frame (41); A second mounting frame (42), the second mounting frame (42) being mounted at the bottom of the support seat (1), and being located on the same side of the limiting wheel (2), the peeling knife (3) and the first mounting frame (41), and being arranged adjacent to the first mounting frame (41); and A driving member (43) and a linkage member (44), wherein the driving member (43) and the linkage member (44) are transmission-connected and are mounted on the second mounting frame (42), and the linkage member (44) is respectively connected to the axles of the first roller (411) and the second roller (412).

3. The auxiliary tool according to claim 2, characterized in that: The linkage member (44) comprises: A transmission rod (441), the transmission rod (441) is rotatably mounted in the second mounting frame (42) and is fixedly connected to the output shaft of the driving member (43); A gear set (442), the gear set (442) being respectively mounted on the transmission rod (441), the axles of the first roller (411) and the second roller (412), and the gear set (442) on the transmission rod (441) meshes with the gear sets (442) on the axles of the first roller (411) and the second roller (412) for transmission, and causing the rotation directions of the first roller (411) and the second roller (412) to be opposite.

4. The auxiliary tool according to claim 3, characterized in that: The roller one (411) and the limiting wheel (2) are located at the same height of the support seat (1), the roller two (412) is located above the roller one (411), and the mounting frame one (41) is provided with a limiting groove (410) at the wheel axle on which the roller one (411) is mounted, so that the distance between the roller one (411) and the roller two (412) can be changed.

5. The auxiliary tool according to claim 4, characterized in that: The top end of the second mounting frame (42) extends to the top of the first mounting frame (41), and a U-shaped plate (413) is installed on the top of the first mounting frame (41). The top of the U-shaped plate (413) is slidably installed on the second mounting frame (42), and the bottom ends of the U-shaped plate (413) are rotatably connected to the wheel axle of the second roller (412).

6. The auxiliary tool according to claim 5, characterized in that: The transmission rod (441) is also provided with a sleeve (443) with a keyway, the sleeve (443) is fixedly connected to the gear set (442) corresponding to the second roller (412) on the transmission rod (441), and the sleeve (443) is installed on the key (4410) of the transmission rod (441) through its keyway.

7. The auxiliary tool according to claim 6, characterized in that: The upper end of the sleeve (443) is also fixedly connected to a connecting ring (444), and the connecting ring (444) is sleeved on the transmission rod (441) and fixedly connected to the U-shaped plate (413).

8. The auxiliary tool according to claim 7, characterized in that: The top of the U-shaped plate (413) is threadedly connected to the second installation frame (42) through a screw rod (414), and a rotating wheel (415) is installed on the portion of the screw rod (414) protruding from the second installation frame (42).

9. The auxiliary tool according to claim 1, characterized in that: A guide wheel (21) is also installed at the bottom of the support seat (1), and the guide wheel (21) and the driving assembly (4) are respectively located on both sides of the limiting wheel (2).

10. The auxiliary tool according to claim 1, characterized in that: The top of the skinning knife (3) protrudes from the through slot of the support seat (1), and a scale (30) is provided on the surface of the skinning knife (3) facing the adjusting screw (10), and the reading of the scale (30) on the end surface protruding from the support seat (1) corresponds to the distance between the blade of the skinning knife (3) and the limiting wheel (2).

Images