Torque output device with gear rotation positioning function

Abstract

The utility model provides a torque output device with a gear rotation positioning function, a cavity is arranged in a shell, a gear shaft through hole is arranged on the end face of one side of the shell, and a motor is fixedly arranged in the inner cavity of the shell. The gear assembly comprises a bevel gear, a middle gear and an output gear, the bevel gear, the middle gear and the output gear are sequentially connected in a meshed mode, the motor worm is in transmission connection with the bevel gear, the output gear is provided with a gear shaft, the gear shaft of the output gear penetrates through the gear shaft through hole and extends to the external space, and the output gear is made of non-magnetic metal materials. The control panel is arranged in an inner cavity of the shell and electrically connected with the control end of the motor, a Hall sensor is assembled in the control panel, a magnet is arranged on the end face of the side, facing the Hall sensor, of the output gear, and when the output gear carries the magnet to rotate synchronously, the Hall sensor can detect the magnetic induction line position change of the magnet. Therefore, the control panel indirectly obtains the rotation direction and speed of the output gear.

Description

TECHNICAL FIELD

[0001] The utility model belongs to torque output device technical field, especially, relate to a torque output device with gear rotation positioning function. BACKGROUND

[0002] In the thermal management system of new energy automobile, the valve core of water valve is driven to rotate by torque output device, so as to adjust the opening position of water valve, change the size of system coolant flow or loop, and realize the purpose of vehicle thermal management. With the continuous development of new energy automobile thermal management system, more and more thermal management systems tend to be integrated, requiring the integration of multiple channels, and the output torque of torque output device is also required to be higher and higher. At the same time, in order to realize the intelligent and accurate control of thermal management system, it is further required to monitor the actual output torque value of torque output device, that is, to monitor the output gear speed and rotation direction data inside the torque output device.

[0003] In the prior art, the output gear of the conventional torque output device is usually made of plastic material, and the gear strength is poor, which is easy to cause tooth breakage under the load of large torque. At the same time, the conventional torque output device cannot realize low-cost, accurate and efficient detection of the output gear speed and rotation direction, so that the actual output torque control precision of the torque output device is poor. UTILITY MODEL CONTENTS

[0004] The utility model provides a torque output device with gear rotation positioning function to solve the technical problems that the existing torque output device cannot realize large torque output and accurate monitoring of the output gear speed and rotation direction.

[0005] To solve the above problems, the technical scheme of the utility model is as follows: a torque output device with gear rotation positioning function, comprising:

[0006] A shell is provided with a cavity inside, and a gear shaft through hole is formed on one side end face of the shell, which connects the inner cavity of the shell to the outside space;

[0007] A motor is fixedly arranged in the inner cavity of the shell, and a worm is fixedly arranged on the output shaft of the motor;

[0008] A gear assembly includes a helical gear, a middle gear and an output gear, which are connected in sequence, and the worm of the motor is connected with the helical gear, and the output gear is provided with a gear shaft in the first end face axis direction, and the gear shaft of the output gear extends to the outside space through the gear shaft through hole;

[0009] Moreover, the output gear is made of non-magnetic metal material;

[0010] A control board is arranged in the inner cavity of the shell, the control board is electrically connected with the motor control end, and a Hall sensor is arranged at a position of the control board facing the first gear. A magnet is arranged on the second end surface of the output gear facing the Hall sensor. When the output gear carrying the magnet rotates synchronously, the Hall sensor can detect the change of the magnetic induction line position of the magnet, so that the control board indirectly obtains the rotation direction and speed of the output gear.

[0011] Preferably, the shell comprises a first shell and a second shell, the first shell and the second shell are made of PBT-GF30 composite material, and the connecting surfaces are sealed and fixed by laser welding. The gear shaft through hole is arranged on the end surface of the first shell.

[0012] Preferably, the torque output device with gear rotation positioning function is provided with a sealing ring, the sealing ring is interference fitted in the gear shaft through hole extending to the inside of the first shell, and the gear shaft side wall and the first end surface of the output gear are kept a rotation gap with the surface of the sealing ring.

[0013] Preferably, the gear shaft of the output gear is provided with an embedded spline hole at the end portion extending to the outside space, and the spline hole is used to realize the clamping and fixing of the gear shaft of the output gear and the external transmission device.

[0014] Preferably, the output gear is provided with a magnet mounting hole on the second end surface, and the magnet is fixed in the magnet mounting hole by adhesive.

[0015] Preferably, the output gear is made of stainless steel iron-based alloy material, and the maximum bearing torque of the output gear is at least 16 Nm.

[0016] Preferably, one end of the second shell is further provided with a plug connector through hole, a plug connector PIN needle group is arranged in the plug connector through hole, one end of the plug connector PIN needle group is electrically connected with the control board, and the plug connector PIN needle group is used to realize the electrical connection between the control board and the external monitoring equipment.

[0017] Preferably, the torque output device with gear rotation positioning function is provided with a motor PIN needle group, one end of the motor PIN needle group is electrically connected with the motor control end, the other end is electrically connected with the control board, and the motor PIN needle group is used to realize the driving control connection between the control board and the motor.

[0018] Preferably, the motor is externally provided with a damping frame, the damping frame is fixedly connected with the inner wall of the shell through screws, and the damping frame is used to keep the relative position of the motor and the shell stable.

[0019] Preferably, the control board is fixed in the inner cavity of the shell by hot melt.

[0020] The utility model discloses a kind of torque output devices with gear rotation positioning function, be equipped with motor and gear assembly, gear assembly includes several transmission gears, the rotational speed and torque of motor output shaft can be adjusted to requirement by gear assembly, simultaneously, output gear is made of non-magnetic metal material, guarantee that output gear has preferable strength.

[0021] The utility model discloses a kind of torque output devices with gear rotation positioning function, be equipped with motor and gear assembly, gear assembly includes several transmission gears, the rotational speed and torque of motor output shaft can be adjusted to requirement by gear assembly, simultaneously, output gear is made of non-magnetic metal material, guarantee that output gear has preferable strength. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 The utility model provides a kind of torque output devices with gear rotation positioning function's structural schematic diagram;

[0023] Fig. 2 The utility model provides the structure schematic diagram of spline hole of output gear;

[0024] Fig. 3 The utility model provides the structure schematic diagram of magnet mounting hole of output gear.

[0025] Reference signs: 1: first shell;2: second shell;3: motor;4: worm;5: bevel gear;6: middle gear;7: output gear;8: gear shaft;9: control board;10: sealing ring;11: spline hole;12: magnet mounting hole;13: plug connector PIN group;14: motor PIN group;15: shock-absorbing frame;16: screw;17: gear shaft through-hole;18: magnet. DETAILED DESCRIPTION

[0026] The utility model discloses a kind of torque output devices with gear rotation positioning function, be equipped with motor and gear assembly, gear assembly includes several transmission gears, the rotational speed and torque of motor output shaft can be adjusted to requirement by gear assembly, simultaneously, output gear is made of non-magnetic metal material, guarantee that output gear has preferable strength.

[0027] Reference Figs. 1 to 3The embodiment provides a torque output device with gear rotation positioning function, which can realize accurate control of specific output torque value while realizing torque output.

[0028] Specifically, the torque output device with gear rotation positioning function comprises a shell, a motor 3, a gear assembly and a control board 9.

[0029] The shell comprises a first shell 1 and a second shell 2, both of which are made of PBT-GF30 composite material and have high mechanical strength and dimensional stability. The connecting surface of the first shell 1 and the second shell 2 is sealed and fixed by laser welding. When the first shell 1 and the second shell 2 are spliced, an accommodation cavity is formed in the interior, which is used to place components such as the motor 3, the gear assembly and the control board 9. A gear shaft through hole 17 is formed in the end surface of the first shell 1, which connects the inner cavity of the shell to the external space.

[0030] The motor 3 is fixed in the inner cavity of the shell, and a worm 4 is fixed on the output shaft of the motor 3. The motor 3 is used as an initial power output source in this embodiment.

[0031] The gear assembly comprises at least three gear structures of bevel gear 5, intermediate gear 6 and output gear 7. The bevel gear 5, the intermediate gear 6 and the output gear 7 are connected in sequence to realize power transmission. The bevel gear 5 is a gear device with inclined helical teeth, which is used as an input gear and is in transmission connection with the worm 4 of the motor 3 in this embodiment. The intermediate gear 6 is located between the bevel gear 5 and the output gear 7 and is used for power transmission. The output gear 7 is the last gear device in the gear transmission system and is used to directly provide torque to the external transmission device. In this embodiment, the output gear 7 is provided with an extended gear shaft 8 in the first end surface axis direction. The gear shaft 8 of the output gear 7 passes through the gear shaft through hole 17 and extends to the external space, and is connected with the external transmission device. In this embodiment, based on the cooperation of the bevel gear 5, the intermediate gear 6 and the output gear 7 in the gear assembly, the gear reduction ratio is adjusted, and then the torque value directly output by the motor 3 is adjusted to the actual required torque value.

[0032] The control panel 9 is fixedly arranged in the inner cavity of the shell, the control panel 9 is electrically connected with the control end of the motor 3, the rotating direction and rotating speed of the output shaft of the motor 3 can be adjusted through the control panel 9, and a Hall sensor is further arranged in the control panel 9 and faces the output gear 7, and the Hall sensor is opposite to the output gear 7. Meanwhile, a magnet 18 is fixedly arranged in the second end face of the output gear 7 facing the Hall sensor, when the motor 3 is started, the output shaft of the motor 3 drives the output gear 7 to rotate through the gear assembly, and the output gear 7 carrying the magnet 18 rotates synchronously, the magnetic induction line position of the magnet 18 changes in the rotating process, the real-time change degree of the magnetic induction line position can be accurately detected by the Hall sensor, and the accurate rotating direction, rotating position and rotating speed of the output gear 7 can be calculated based on the magnet 18 magnetic induction line detection data output by the Hall sensor. Further, based on the real-time output torque value of the output gear 7, the initial output torque of the motor 3 is controlled in a negative feedback mode, so that the final torque output by the torque output device provided in the embodiment is accurately matched with the torque requirement of the operation site.

[0033] It is worth noting that in the embodiment, the output gear 7 is made of a non-magnetic metal material and is processed by a powder metallurgy process, and is preferably made of a stainless steel iron-based alloy material. The output gear 7 has the characteristics of non-magnetic metal, balanced hardness and toughness, so that the maximum torque that can be borne by the output gear 7 can reach at least 16 Nm. At the same time, the output gear 7 will not interfere with the magnetic field of the magnet 18 assembled thereon, thereby ensuring the accurate detection of the Hall sensor on the magnetic induction line position of the magnet 18. The technical problems that the conventional torque output device cannot output large torque due to the material characteristics of the gear, and the magnetic metal material of the gear cannot avoid interfering with the detection accuracy of the Hall sensor, are solved.

[0034] In the following, the specific structure of the torque output device with gear rotating positioning function provided in the embodiment will be further described.

[0035] In the embodiment, the torque output device is provided with a sealing ring 10, the sealing ring 10 is interference-fitted in the gear shaft through hole 17 extending to the inside of the first shell 1, that is, the gear shaft 8 of the output gear 7 extends to the outside space through the sealing ring 10, the side wall and the first end face of the gear shaft 8 of the output gear 7 are kept a rotating gap with the surface of the sealing ring 10, and the rotating gap is preferably less than or equal to 0.5 mm, so that the abrasion of the sealing ring 10 caused by the output gear 7 in the rotating process is reduced, and the interference of the sealing ring 10 on the rotation of the output gear 7 is reduced. At the same time, the sealing ring 10 can prevent external liquids or impurities from entering the inner cavity of the shell through the gear shaft through hole 17, so as to realize the relative sealing effect of the shell and ensure the safe operation of the internal parts and electronic components.

[0036] In the embodiment, the gear shaft 8 of the output gear 7 is provided with an embedded spline hole 11 at the end extending to the outside space, the spline hole 11 includes cross shape, triangle shape, rectangle shape and the like, the spline hole 11 can be clamped and fixed with the external transmission device, and then the output gear 7 can better transmit torque and axial force to the outside.

[0037] In the embodiment, the output gear 7 is provided with a magnet mounting hole 12 at the second end face, the shape of the magnet mounting hole 12 is matched with the shape of the magnet 18, the magnet 18 is placed in the magnet mounting hole 12 after the adhesive is injected in the magnet mounting hole 12, and the magnet 18 is fixedly installed on the output gear 7, and when the output gear 7 rotates, the magnet 18 can be driven to rotate synchronously.

[0038] In the embodiment, one end of the second shell 2 is also provided with a plug connector through hole, the plug connector through hole is connected to the inside cavity of the shell to the outside space, the plug connector PIN needle group 13 is arranged to pass through the plug connector through hole, one end of the plug connector PIN needle group 13 is electrically connected with the control panel 9, the plug connector PIN needle group 13 is used to electrically connect the control panel 9 with the external monitoring equipment, and then the control panel 9 can output the rotation direction, rotation position and rotation speed of the output gear 7 to the external monitoring equipment, and the external monitoring equipment can supply power to the control panel 9 and the motor 3 through the plug connector PIN needle group 13, and input motor control instructions to the control panel 9.

[0039] In the embodiment, the torque output device is also provided with a motor PIN needle group 14, one end of the motor PIN needle group 14 is electrically connected with the control end of the motor 3, and the other end is electrically connected with the control panel 9, the motor PIN needle group 14 is used to drive and control the motor 3 and supply power to the control panel 9.

[0040] In the embodiment, the motor 3 is provided with a damping frame 15 outside, the damping frame 15 is fixedly connected with the inner wall of the shell through the screw 16, which is used to fix the relative position of the motor 3 in the inside cavity of the shell, and provide damping protection for the motor 3, so as to avoid the shaking of the motor 3 during operation and affect the output torque accuracy of the torque output device.

[0041] In the embodiment, the control panel 9 is fixed in the inside cavity of the shell by hot melting.

[0042] The embodiments of the utility model are described in detail above combined with the drawings, but the utility model is not limited to the above-mentioned embodiments. Even if various changes are made to the utility model, if the changes belong to the scope of the utility model claims and equivalent technologies, they still fall within the protection scope of the utility model.

Claims

1. A torque output device with gear rotation positioning function, characterized in that, The utility model relates to a kind of motor drive control device, including: Shell, the shell is equipped with cavity inside, and the shell one side end surface is equipped with a gear shaft through-hole, the gear shaft through-hole is connected with the shell inner cavity to outside space; Motor, the motor is fixed in the shell inner cavity, the motor output shaft is fixed with worm gear; Gear assembly, the gear assembly includes helical gear, middle gear and output gear, the helical gear, the middle gear and the output gear are sequentially engaged connection, and the motor worm gear is drivingly connected with the helical gear, the output gear is equipped with gear shaft in its first end surface axis direction, and the gear shaft of the output gear extends to outside space through the gear shaft through-hole; And, the output gear is made of non-magnetic metal material; Control panel, the control panel is equipped in the shell inner cavity, the control panel is electrically connected with the motor control end, and the control panel is equipped with Hall sensor towards the position of the first gear, the second end surface of the output gear towards the Hall sensor side is equipped with magnet, the control panel is configured, when the output gear carries magnet synchronous rotation, the Hall sensor can detect the magnetic induction line position change of magnet, so that the control panel indirectly obtains the rotation direction and speed of the output gear.

2. The torque output device having a gear rotation positioning function according to claim 1, characterized in that, The shell includes a first shell and a second shell, the first shell and the second shell are made of PBT-GF30 composite material and are connected by laser welding to realize sealing and fixation of the connecting surface. The gear shaft through-hole is arranged on the end surface of the first shell.

3. The torque output device having a gear rotation positioning function according to claim 2, characterized in that, A sealing ring is provided, which is interference-fitted in the gear shaft through-hole extending to one side inside the first shell, and the side wall and the first end surface of the gear shaft of the output gear are kept a rotation gap with the surface of the sealing ring.

4. The torque output device having a gear rotation positioning function according to claim 1, wherein, The gear shaft of the output gear is provided with an embedded spline hole at the end portion extending to the outside space, and the spline hole is used to realize the clamping and fixation of the gear shaft of the output gear and an external transmission device.

5. The torque output device having a gear rotation positioning function according to claim 1, wherein, The output gear is provided with a magnet mounting hole in the second end surface, and the magnet is fixed in the magnet mounting hole by adhesive.

6. The torque output device having a gear rotation positioning function according to claim 1, wherein, The output gear is made of stainless steel iron-based alloy material, and the maximum torque that the output gear can withstand is at least 16 Nm.

7. The torque output device having a gear rotation positioning function according to claim 2, wherein The second shell is further provided with a plug connector through-hole, and a plug connector PIN needle group is arranged in the plug connector through-hole, one end of the plug connector PIN needle group is electrically connected with the control panel, and the plug connector PIN needle group is used to realize the electrical connection between the control panel and an external monitoring device.

8. The torque output device having a gear rotation positioning function according to claim 1, wherein, A motor PIN needle group is provided, one end of the motor PIN needle group is electrically connected with the motor control end, the other end is electrically connected with the control panel, and the motor PIN needle group is used to realize the driving control connection between the control panel and the motor.

9. The torque output device having a gear rotation positioning function according to claim 1, wherein, The motor is externally provided with a shock-absorbing frame, the shock-absorbing frame is fixedly connected with the inner wall of the shell by screws, and the shock-absorbing frame is used to keep the relative position of the motor and the shell stable.

10. The torque output device having a gear rotation positioning function according to claim 1, wherein, The control panel is fixed in the shell inner cavity by hot melting.

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