Constant torque generator and real-time constant force tensor

Abstract

The present invention provides a constant torque generator and a real-time constant force tensioner, the constant torque generator comprising: a rotatable power output member; a constant force coil spring, one end of which is fixed and the other end is fixed on the power output member. The real-time constant force tensioner comprises: a rotatable shaft; a winding wheel, wound with a pull rope, and capable of driving the shaft to rotate; an independent constant torque generator, comprising a rotatable power output member and at least one constant force coil spring, the power output member forms a power connection with the shaft, the at least one constant force coil spring is arranged beside the power output member, one end of each constant force coil spring is fixed, and the other end is fixed on the power output member. The present invention can replace heavy objects to generate torque and tension, and has the advantages of lightness, space saving, easy storage, low cost, adjustability, and real-time constant force.

Description

Technical Field

[0001] The invention relates to a constant torque generator which utilizes a coil spring to provide force and can be applied to the technical fields of fitness equipment, mechanical industry, aerospace, automobile and the like. Background Art

[0002] Existing tension equipment, such as the chest clamp commonly seen in gyms, all provide resistance by pulling on metal weights. More common dumbbells and barbell plates are also made of metal to provide gravity of varying magnitudes. The extensive use of metal materials makes fitness equipment heavy, difficult to move, and expensive. In addition, these metal dumbbells and barbell plates have the risk of being smashed during transportation and storage, which is a major obstacle to the entry of strength fitness equipment into households.

[0003] Different from other tensioning equipment on the market, the purpose of the present invention is to provide adjustable real-time constant force, so that users or objects can be subjected to the same force at different speeds, so as to achieve better training effects or more stable output. Summary of the invention

[0004] The present invention provides a constant torque generator and a real-time constant force tensile device, which use a coil spring to provide force, aiming to reduce the amount of metal used, so as to save costs and reduce weight, and at the same time can provide an adjustable real-time constant force.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A constant torque generator, characterized by comprising:

[0007] a rotatable power output member;

[0008] At least one constant force coil spring is arranged beside the power output member, one end of which is fixed and the other end is fixed on the power output member.

[0009] The constant torque generator, wherein: the power output member is an auxiliary output wheel, a rotating shaft capable of relatively free rotation is provided inside the auxiliary output wheel, and a power connection is formed between the auxiliary output wheel and the rotating shaft via a clutch device.

[0010] The constant torque generator, wherein: meshing teeth are formed on the end surface of one end of the auxiliary output wheel, the clutch device is a transmission toothed disc that can slide on the rotating shaft is arranged on one side of each auxiliary output wheel, and the transmission toothed disc can keep synchronous rotation with the rotating shaft; one end of the transmission toothed disc is provided with transmission teeth, and the transmission teeth are arranged relative to the meshing teeth of the auxiliary constant torque generator and can form meshing when they are close to each other.

[0011] The constant torque generator, wherein: a latching tooth is formed on the inner circumference of the transmission gear plate, and a latching groove is correspondingly formed on the outer circumference of the rotating shaft, and the latching tooth and the latching groove are correspondingly matched, so that the transmission gear plate and the rotating shaft can maintain synchronous rotation.

[0012] The constant torque generator, wherein: the transmission toothed disc is connected with an elastic member, so that the transmission teeth of the transmission toothed disc are separated from the meshing teeth of the auxiliary constant torque generator under normal conditions;

[0013] An insert capable of radially cutting in is arranged on the radial outer side of each transmission gear disc, and one end of the insert facing the transmission gear disc is an insert blade with a slope.

[0014] The constant torque generator, wherein: the other end of the insert is provided with a tooth row and is slidably arranged in the clamping sleeve, the clamping sleeve is fixed, and the clamping sleeve is provided with a gear that can be toggled or rotated by a knob, and the gear is meshed with the tooth row of the insert.

[0015] The constant torque generator, wherein: the power output member is an independent output wheel, a rotating shaft is passed through the independent output wheel, and the independent output wheel and the rotating shaft can rotate synchronously.

[0016] The constant torque generator, wherein: a latching tooth is formed on the inner circumference of the independent output wheel, and a latching groove is correspondingly formed on the outer circumference of the rotating shaft, and the latching tooth and the latching groove cooperate with each other so that the independent output wheel and the rotating shaft can maintain synchronous rotation.

[0017] The constant torque generator, wherein: the power output member and the at least one constant force coil spring are located on the same plane.

[0018] The constant torque generator further comprises two panels, and the power output member and the constant force coil spring are positioned between the two panels.

[0019] A real-time constant force tensioner, characterized by comprising:

[0020] A rotatable shaft;

[0021] A winding wheel, on which a pull rope is wound, and which can drive the rotating shaft to rotate;

[0022] An independent constant torque generator includes a rotatable power output member and at least one constant force coil spring, wherein the power output member is power-connected to the rotating shaft, and the at least one constant force coil spring is arranged beside the power output member, and one end of each constant force coil spring is fixed, and the other end is fixed to the power output member.

[0023] The real-time constant force tensioner, wherein the power output member of the independent constant torque generator is an independent output wheel, a latching tooth is formed on the inner circumference of the independent output wheel, and a latching groove is correspondingly formed on the outer circumference of the rotating shaft, and the latching tooth and the latching groove correspond to each other, so that the independent output wheel and the rotating shaft can maintain synchronous rotation.

[0024] The real-time constant force tensioner, wherein the inner circumference of the winding wheel is provided with the clamping teeth, and corresponds to the clamping groove of the rotating shaft, so that the winding wheel can drive the rotating shaft to rotate synchronously.

[0025] The real-time constant force tensioner is further provided with at least one auxiliary constant torque generator, which includes a rotatable auxiliary output wheel and at least one constant force coil spring. The at least one constant force coil spring of the auxiliary constant torque generator is arranged beside the auxiliary output wheel, one end of which is fixed and the other end is fixed on the auxiliary output wheel. Each of the auxiliary output wheels is dynamically connected to the rotating shaft through a clutch device.

[0026] The real-time constant force tensioner, wherein the structure of the clutch device is as follows:

[0027] A meshing tooth is formed on one end surface of the auxiliary output wheel, and a transmission gear plate capable of sliding on the rotating shaft is arranged on one side of each auxiliary output wheel, and the transmission gear plate can rotate synchronously with the rotating shaft; a transmission tooth is provided at one end of the transmission gear plate, and the transmission tooth and the meshing tooth of the auxiliary constant torque generator are arranged relative to each other and can form meshing when they are close to each other.

[0028] The real-time constant force tensioner, wherein: a latching tooth is formed on the inner circumference of the transmission gear disc, and a latching groove is correspondingly formed on the outer circumference of the rotating shaft, and the latching tooth and the latching groove cooperate with each other so that the transmission gear disc and the rotating shaft can maintain synchronous rotation.

[0029] The real-time constant force tensioner, wherein: the transmission toothed disc is connected with an elastic member, so that the transmission teeth of the transmission toothed disc are separated from the meshing teeth of the auxiliary constant torque generator under normal conditions;

[0030] An insert capable of radially cutting in is arranged on the radial outer side of each transmission gear disc, and one end of the insert facing the transmission gear disc is an insert blade with a slope.

[0031] The real-time constant force tensile device, wherein: the other end of the insert is provided with a tooth row and is slidably arranged in the ferrule, the ferrule is fixed, and the ferrule is provided with a gear that can be toggled or rotated by a knob, and the gear is meshed with the tooth row of the insert.

[0032] The real-time constant force tensile device, wherein: the rotating shaft is fixed to a bracket, and a suction cup is provided on the bracket.

[0033] The real-time constant force tensioner, wherein the structure of the clutch device is as follows: a toggle mechanism is connected to the transmission gear disc, and the toggle mechanism can be linked through an external operating member to control the axial movement of the transmission gear disc on the rotating shaft to achieve a clutch effect.

[0034] The real-time constant force tensioner, wherein the structure of the clutch device is as follows: the meshing teeth of the auxiliary output wheel are input bevel teeth, the transmission teeth of the transmission gear plate are output bevel teeth, and the axial distance between the transmission gear plate and the auxiliary output wheel is fixed, and a bevel gear plate capable of radial movement is provided on one side of the input bevel teeth and the output bevel teeth, and the bevel gear plate can be linked through an externally arranged operating member to control the bevel gear plate to engage with the input bevel teeth and the output bevel teeth at the same time to form transmission, or to disengage at the same time to disconnect the transmission.

[0035] The present invention can replace heavy objects to generate adjustable constant torque and tension, and has the advantages of being light, space-saving, easy to store, low cost, adjustable, and having real-time constant force. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the auxiliary constant torque generator.

[0037] Figure 2 It is a schematic diagram of the internal structure of the auxiliary constant torque generator.

[0038] Figure 3 It is a structural schematic diagram of the auxiliary output wheel of the auxiliary constant torque generator.

[0039] Figure 4 It is a schematic diagram of the overall structure of an independent constant torque generator.

[0040] Figure 5 It is a structural schematic diagram of an independent output wheel of an independent constant torque generator.

[0041] Figure 6 It is a structural diagram of the rotating shaft.

[0042] Figure 7 It is a schematic diagram of the overall structure of a real-time constant force tensor.

[0043] Figure 8 It is a schematic diagram of the structure of a winding wheel.

[0044] Fig. 9 It is a schematic diagram of the meshing state of the auxiliary output wheel of the auxiliary constant torque generator and the transmission gear disc.

[0045] Fig.10 It is a schematic diagram of the structure of the clutch device.

[0046] Fig.11It is a schematic diagram of the clutch device with the plug extended.

[0047] Fig.12 It is a schematic diagram of another structural form of the clutch device.

[0048] Fig.13 It is a schematic diagram of another structural form of a clutch device.

[0049] Explanation of the reference numerals in the accompanying drawings: auxiliary constant torque generator 10; panel 11; support column 12; auxiliary output wheel 13; input bevel gear 131; constant force coil spring 14; connecting column 15; rotating shaft 20; radial hole 22; slot 25; independent constant torque generator 30; independent output wheel 33; latching tooth 35; winding wheel 40; clutch device 60; transmission gear disc 61; fixing part 611; output bevel gear 612; insert piece 62; insert blade 621; tooth row 622; sleeve 63; gear 64; toggle mechanism 65; knob 66; bevel gear disc 67; bracket 90; suction cup 91. DETAILED DESCRIPTION

[0050] The object of the present invention is to provide an adjustable real-time constant force tensioner, such as Figure 7 As shown, an independent constant torque generator 30 is arranged on a rotating shaft 20 to form a basic constant tension, and then a plurality of auxiliary constant torque generators 10 are arranged on the rotating shaft 20. At the same time, a controllable clutch device 60 is used to enable each auxiliary constant torque generator 10 and the rotating shaft 20 to switch the power on-off relationship, so as to provide real-time constant tensions of different levels for users to choose.

[0051] like Figure 1 , Figure 2 , Figure 3 , Figure 6 As shown, the auxiliary constant torque generator 10 provided by the present invention includes:

[0052] Two oppositely arranged panels 11 are fixedly connected by support columns 12 and connecting columns 15;

[0053] The rotating shaft 20 passes through the two panels 11 in a vertical direction;

[0054] The auxiliary output wheel 13 is disposed between the two panels 11 and is freely rotatably sleeved on the rotating shaft 20. A one-way meshing tooth is formed on one end surface of the auxiliary output wheel 13.

[0055] Four support columns 12 are fixed between the two panels 11 and arranged around the periphery of the auxiliary output wheel 13;

[0056] Four constant force coil springs 14 have one end fixed to and wrapped around a support column 12 , and the other end fixed to the auxiliary output wheel 13 .

[0057] In this way, when the auxiliary output wheel 13 rotates under the tension, the four constant force coil springs 14 will be deformed to provide a resistance torque to the auxiliary output wheel 13, that is, the auxiliary constant torque generator 10 can provide a reverse tension. In fact, the number of constant force coil springs 14 is not limited to four, and can be one, two, three, four, five, six, seven, eight, or more. By using different numbers of constant force coil springs 14, the torque provided by the auxiliary constant torque generator 10 can be changed in stages.

[0058] For example Figure 4 , Figure 5 , Figure 6 As shown, the independent constant torque generator 30 provided by the present invention is different from the auxiliary constant torque generator 10 in that:

[0059] The auxiliary output wheel 13 is replaced by an independent output wheel 33. The independent output wheel 33 is no longer provided with one-way meshing teeth. Instead, a latching tooth 35 is formed on the inner circumference of the independent output wheel 33, and a latching groove 25 is correspondingly formed on the outer circumference of the rotating shaft 20. When the independent output wheel 33 is sleeved with the rotating shaft 20, the corresponding cooperation between the latching tooth 35 and the latching groove 25 enables the independent output wheel 33 and the rotating shaft 20 to keep rotating synchronously.

[0060] like Figure 7 FIG. 1 is a schematic diagram of the overall structure of the real-time constant force tensioner provided by the present invention, wherein:

[0061] The rotating shaft 20 is rotatably arranged on the bracket 90;

[0062] An independent constant torque generator 30, four auxiliary constant torque generators 10 (in order to see the internal details clearly, the two auxiliary constant torque generators 10 on the left are removed) and a winding wheel 40 are arranged on the rotating shaft 20; a clutch device 60 is arranged between the auxiliary output wheel 13 of each auxiliary constant torque generator 10 and the rotating shaft 20, so that the auxiliary output wheel 13 of each auxiliary constant torque generator 10 can choose to connect to the rotating shaft 20 or disconnect from the rotating shaft 20; thus providing multiple groups of different pulling forces. Of course, the number of independent constant torque generators 30 and auxiliary constant torque generators 10 on the rotating shaft 20 is not limited to that shown in the above embodiment, and the actual number can be freely increased or decreased according to actual needs.

[0063] like Figure 8 As shown, the inner circumference of the winding wheel 40 is provided with the latching teeth 35, so as to correspond to the latching grooves 25 of the rotating shaft 20, so that the winding wheel 40 can drive the rotating shaft 20 to rotate synchronously. A pull rope (not shown) can be wound on the outer circumference of the winding wheel 40, and by pulling the pull rope, the winding wheel 40 can rotate, thereby driving the rotating shaft 20 to rotate synchronously.

[0064] like Figure 7 , Fig. 9 , Fig.10 , Fig.11 As shown, the structure of the clutch device 60 is as follows:

[0065] The axial position of each auxiliary constant torque generator 10 is fixed, and a transmission gear plate 61 capable of sliding on the rotating shaft 20 is arranged on one side of each auxiliary constant torque generator 10, and the inner circumference of the transmission gear plate 61 is provided with the latching teeth 35 (not shown) to keep synchronous rotation with the rotating shaft 20;

[0066] One end of the transmission gear plate 61 is provided with a one-way transmission tooth, and the one-way transmission tooth is arranged opposite to the one-way meshing tooth of the auxiliary constant torque generator 10 and can mesh with it;

[0067] Two fixing parts 611 are arranged on the transmission gear plate 61, and one end of an elastic member (such as a tension spring, not shown) can be hung, and the other end of the elastic member can be fixed at the radial hole 22 of the rotating shaft 20, so that the one-way transmission teeth of the transmission gear plate 61 are separated from the one-way meshing teeth of the auxiliary constant torque generator 10 under normal conditions;

[0068] An insert 62 is arranged on the radial outer side of each transmission gear disc 61. One end of the insert 62 facing the transmission gear disc 61 is an insert blade 621 with a slope, and the other end is provided with a tooth row 622 and is slidably arranged in a clamping sleeve 63. The clamping sleeve 63 is fixed, and a gear 64 that can be dialed or rotated by a knob 66 ​​is provided on the clamping sleeve 63. The gear 64 is meshed with the tooth row 622 of the insert 62. By dialing the gear 64 with a finger to rotate, the insert 62 can be controlled relative to the transmission gear disc 61. When the insert 62 moves radially, the slope of the insert blade 621 abuts against the transmission toothed disc 61, which can push the transmission toothed disc 61 to move axially, so that the one-way transmission teeth on the transmission toothed disc 61 are meshed with the one-way meshing teeth of the auxiliary constant torque generator 10. When the toothed disc moves upward, the transmission toothed disc 61 is pushed to move axially in the other direction under the action of the elastic member, so that the one-way transmission teeth on the transmission toothed disc 61 are disengaged from the one-way meshing teeth of the auxiliary constant torque generator 10.

[0069] like Fig.12 FIG. 2 shows another feasible structure of the clutch device 60: a toggle mechanism 65 (such as a lever, a connecting rod mechanism, etc.) is connected to the transmission gear plate 61, and the toggle mechanism 65 is linked by an external operating member such as a toggle button, thereby controlling the axial movement of the transmission gear plate 61 on the rotating shaft 20 to achieve a clutch effect. In this embodiment, an elastic member may be provided or not.

[0070] like Fig.13As shown, it is another feasible structure of the clutch device 60: the one-way meshing teeth of the auxiliary output wheel 13 of the auxiliary constant torque generator 10 are input bevel teeth 131, the one-way transmission teeth of the transmission toothed disc 61 are output bevel teeth 612, and the axial distance between the transmission toothed disc 61 and the auxiliary output wheel 13 is fixed. At this time, a radially movable bevel toothed disc 67 is provided on one side of the input bevel teeth 131 and the output bevel teeth 612, and the bevel toothed disc 67 is linked by an operating member such as an externally arranged button to control the bevel toothed disc 67 to engage with the input bevel teeth 131 and the output bevel teeth 612 at the same time to form transmission, or to disengage at the same time to disconnect the transmission.

[0071] like Figure 7 As shown, two suction cups 91 can be fixed on the bracket 90, and the bracket 90 can be conveniently fixed on a smooth surface through the suction cups 91. At this time, by pulling the pull rope (equipped with a handle and a pulley) on the winding wheel 40, the resistance provided by the independent constant torque generator 30 and the auxiliary constant torque generator 10 can be used to perform various fitness exercises, which has the advantages of being light, space-saving, easy to store, low cost, adjustable, and real-time constant force. At the same time, by operating each clutch device 60, different numbers and different torques of the auxiliary constant torque generators 10 can be involved in the work, providing resistance at various levels of gradients to meet the different requirements of trainees with different strength bases.

[0072] In addition to being applied to fitness equipment, the present invention can also be applied to technical fields such as mechanical industry, aerospace, and automobiles, achieving the technical effect of replacing heavy objects.

[0073] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the claims, but all will fall within the scope of protection of the present invention.

Claims

1. A constant torque generator, characterized in that: include: A rotatable power output member, wherein the power output member is an auxiliary output wheel, a rotating shaft capable of relatively free rotation is provided inside the auxiliary output wheel, and a power connection is formed between the auxiliary output wheel and the rotating shaft via a clutch device; At least one constant force coil spring, arranged beside the power output member, one end of which is fixed and the other end is fixed to the power output member; Among them, meshing teeth are formed on one end surface of the auxiliary output wheel, and the clutch device is a transmission gear plate that can slide on the rotating shaft is arranged on one side of each auxiliary output wheel, and the transmission gear plate can keep synchronous rotation with the rotating shaft; one end of the transmission gear plate is provided with transmission teeth, and the transmission teeth are arranged relative to the meshing teeth of the auxiliary output wheel and can form meshing when they are close to each other.

2. The constant torque generator according to claim 1, characterized in that: A latching tooth is formed on the inner circumference of the transmission gear disc, and a latching groove is correspondingly formed on the outer circumference of the rotating shaft. The latching tooth and the latching groove are matched with each other, so that the transmission gear disc and the rotating shaft can keep rotating synchronously.

3. The constant torque generator according to claim 1, characterized in that: The transmission gear disc is connected with an elastic member so that the transmission teeth of the transmission gear disc are separated from the meshing teeth of the auxiliary output wheel under normal conditions; An insert capable of radially cutting in is arranged on the radial outer side of each transmission gear disc, and one end of the insert facing the transmission gear disc is an insert blade with a slope.

4. The constant torque generator according to claim 3, characterized in that: The other end of the insert is provided with a tooth row and is slidably arranged in the clamping sleeve, the clamping sleeve is fixed, and the clamping sleeve is provided with a gear that can be toggled or rotated by a knob, and the gear is meshed with the tooth row of the insert.

5. The constant torque generator according to claim 1, characterized in that: The power output member is an independent output wheel, a rotating shaft is inserted into the independent output wheel, and the independent output wheel and the rotating shaft can rotate synchronously.

6. The constant torque generator according to claim 5, characterized in that: A latching tooth is formed on the inner circumference of the independent output wheel, and a latching groove is correspondingly formed on the outer circumference of the rotating shaft. The latching tooth and the latching groove are matched with each other, so that the independent output wheel and the rotating shaft can keep rotating synchronously.

7. The constant torque generator according to claim 1, characterized in that: The power output member and the at least one constant force coil spring are located on the same plane.

8. The constant torque generator according to any one of claims 1 to 7, characterized in that: Also included are two panels, with the power output member and the constant force coil spring positioned between the two panels.

9. A real-time constant force tensioner, characterized in that: include: A rotatable shaft; A winding wheel, on which a pull rope is wound, and which can drive the rotating shaft to rotate; An independent constant torque generator, comprising a rotatable power output member and at least one constant force coil spring, wherein the power output member is in power connection with the rotating shaft, and the at least one constant force coil spring is arranged beside the power output member, and one end of each constant force coil spring is fixed, and the other end is fixed to the power output member; At least one auxiliary constant torque generator, the auxiliary constant torque generator comprising a rotatable auxiliary output wheel and at least one constant force coil spring, the at least one constant force coil spring of the auxiliary constant torque generator is arranged beside the auxiliary output wheel, one end of the at least one constant force coil spring is fixed, and the other end is fixed to the auxiliary output wheel, each of the auxiliary output wheels is connected to the rotating shaft through a clutch device; The structure of the clutch device is as follows: meshing teeth are formed on one end surface of the auxiliary output wheel, and a transmission gear plate capable of sliding on the rotating shaft is arranged on one side of each auxiliary output wheel, and the transmission gear plate can rotate synchronously with the rotating shaft; a transmission tooth is provided at one end of the transmission gear plate, and the transmission tooth and the meshing teeth of the auxiliary constant torque generator are arranged relative to each other and can mesh when they are close to each other.

10. The real-time constant force tensioner according to claim 9, characterized in that: The power output part of the independent constant torque generator is an independent output wheel, a latching tooth is formed on the inner circumference of the independent output wheel, and a latching groove is correspondingly formed on the outer circumference of the rotating shaft. The latching tooth and the latching groove cooperate with each other so that the independent output wheel and the rotating shaft can maintain synchronous rotation.

11. The real-time constant force tensioner according to claim 10, characterized in that: The clamping teeth are arranged on the inner circumference of the winding wheel and are matched with the clamping grooves of the rotating shaft, so that the winding wheel can drive the rotating shaft to rotate synchronously.

12. The real-time constant force tensioner according to claim 9, characterized in that: A latching tooth is formed on the inner circumference of the transmission gear disc, and a latching groove is correspondingly formed on the outer circumference of the rotating shaft. The latching tooth and the latching groove are matched with each other, so that the transmission gear disc and the rotating shaft can keep rotating synchronously.

13. The real-time constant force tensioner according to claim 9, characterized in that: The transmission gear disc is connected with an elastic member so that the transmission teeth of the transmission gear disc are separated from the meshing teeth of the auxiliary constant torque generator under normal conditions; An insert capable of radially cutting in is arranged on the radial outer side of each transmission gear disc, and one end of the insert facing the transmission gear disc is an insert blade with a slope.

14. The real-time constant force tensioner according to claim 13, characterized in that: The other end of the insert is provided with a tooth row and is slidably arranged in the clamping sleeve, the clamping sleeve is fixed, and the clamping sleeve is provided with a gear that can be toggled or rotated by a knob, and the gear is meshed with the tooth row of the insert.

15. The real-time constant force tensioner according to claim 9, characterized in that: The rotating shaft is fixed to the bracket, and a suction cup is arranged on the bracket.

16. The real-time constant force tensioner according to claim 9, characterized in that: The structure of the clutch device is as follows: a toggle mechanism is connected to the transmission gear disc, and the toggle mechanism can be linked by an external operating member to control the axial movement of the transmission gear disc on the rotating shaft to achieve a clutch effect.

17. The real-time constant force tensioner according to claim 9, characterized in that: The structure of the clutch device is as follows: the meshing teeth of the auxiliary output wheel are input bevel teeth, the transmission teeth of the transmission gear plate are output bevel teeth, and the axial distance between the transmission gear plate and the auxiliary output wheel is fixed. A radially movable bevel gear plate is provided on one side of the input bevel teeth and the output bevel teeth. The bevel gear plate can be linked by an externally arranged operating member to control the bevel gear plate to mesh with the input bevel teeth and the output bevel teeth at the same time to form transmission, or to disengage at the same time to disconnect transmission.

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