Direct current torque motor
By installing oil barriers at the first bearing of the DC torque motor and using permanent magnets to improve magnetic field stability, the problems of dust adhesion and lubricating oil leakage are solved, extending the service life of the motor and improving the smooth operation.
Patent Information
- Application Number
- CN202420072985.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-12
AI Technical Summary
Due to inadequate sealing of ordinary DC torque motors, it is easy to cause the rotor shaft lubricant oil to leak and dust to stick, resulting in increased rotational resistance, reduced output torque, increased motor load, and even the coil burnout.
A DC torque motor is designed, and an oil barrier is provided at the first bearing in the shaft hole to prevent dust from entering and avoid lubricating oil leakage, reduce friction, and improve the magnetic field stability of the motor through permanent magnets and magnet needles. .
Effectively prevent dust adhesion and lubricant leakage, reduce internal pollution and wear of the motor, extend service life, reduce maintenance costs and downtime, and improve operational stability and operation efficiency.
Smart Images
Figure CN222169476U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a DC torque motor. Background Art
[0002] DC torque motor is a kind of torque motor, which uses direct current as power source. It is a special motor with soft mechanical characteristics and wide speed regulation range. The shaft of this motor outputs power with constant torque instead of constant power. DC torque motor can output higher output speed with smaller output torque. The speed and output torque can be adjusted independently. It is easy to use and simple to operate, and has higher controllability than general AC torque motor.
[0003] At present, the torque output end of ordinary DC torque motors is easily sealed, which may cause the lubricating oil of the rotor shaft to leak out. The connection between the rotor shaft and the casing is easily sticky with dust, which increases the rotation resistance, reduces the output torque and increases the motor load, eventually causing the coil to burn out. Utility Model Content
[0004] The utility model aims to develop a DC torque motor which can prevent dust from adhering to the connection between the rotor shaft and the housing.
[0005] The utility model is achieved through the following technical solutions:
[0006] A DC torque motor, comprising:
[0007] The large, interconnected chassis and rear cover;
[0008] Axis hole, provided on the large housing;
[0009] The rotor shaft has a front end and a rear end which are rotatably connected to the large casing and the rear cover respectively;
[0010] An output gear, arranged on the rotor shaft;
[0011] Wherein, a first bearing rotatably connected to the rotor shaft is provided in the shaft hole, and an oil baffle gasket is provided on the side of the first bearing away from the rear cover. The oil baffle gasket is arranged in the shaft hole and sleeved on the rotor shaft.
[0012] Optionally, 16 flux plates are provided on the rotor shaft, commutators are provided at the ends of the flux plates, and electric core wires are wound around the flux plates.
[0013] Optionally, the commutator includes three metal commutator segments and a plastic bushing, the plastic bushing is arranged on the rotor shaft, the metal commutator segments are arranged on the plastic bushing, and the electric core wires are connected to the metal commutator segments.
[0014] Optionally, the large housing has two symmetrical inner curved surfaces, and a permanent magnet is respectively provided on the two inner curved surfaces.
[0015] Optionally, a U-shaped magnetic card pin is provided between the two permanent magnets, and the magnetic card pin is clamped between the large housing and the rear cover.
[0016] Optionally, the rear cover is provided with a second bearing rotatably connected to the rear end of the rotor shaft.
[0017] Optionally, two brushes are provided in the rear cover and are in rotational contact with the metal commutator segments of the commutator.
[0018] The beneficial effects of the utility model are:
[0019] The oil-blocking gasket has the effect of preventing dust and preventing the lubricating oil from leaking from the first bearing, which can prevent the rotor shaft and the first bearing from being adhered to dust, resulting in increased rotation resistance, and prevent dust and impurities from entering the motor, thereby reducing pollution and corrosion inside the motor, protecting the internal parts of the motor, extending their service life, reducing the internal maintenance work of the motor, reducing maintenance costs and downtime, and ensuring work efficiency;
[0020] The first bearing and the second bearing can reduce the friction between the moving parts inside the motor, thereby reducing wear, helping to extend the service life of the motor, reducing maintenance requirements, improving running smoothness, stabilizing the axis of the rotating parts of the motor, ensuring that they rotate in a smooth manner, helping to reduce vibration and noise, and improving the running smoothness of the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 It is a three-dimensional structural diagram of the utility model;
[0023] Figure 2 It is the internal structure diagram of the utility model;
[0024] Figure 3 This is the structural diagram of the rotor shaft.
[0025] Figure numerals: 1. large casing; 2. rear cover; 3. rotor shaft; 4. output gear; 5. oil baffle gasket; 6. first bearing; 7. magnet clamping pin; 8. permanent magnet; 9. flux sheet; 10. commutator; 11. brush; 12. second bearing. DETAILED DESCRIPTION
[0026] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.
[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.
[0028] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.
[0029] like Figures 1 to 3 As shown, the utility model discloses a DC torque motor, including a large casing 1 and a rear cover 2 connected to each other, the large casing 1 has two symmetrical inner arc surfaces, a permanent magnet 8 is respectively provided on the two inner arc surfaces, a U-shaped magnet clamping pin 7 is provided between the two permanent magnets 8, and the magnet clamping pin 7 is clamped between the large casing 1 and the rear cover 2.
[0030] A rotor shaft 3 is rotatably provided on the large housing 1 and the rear cover 2. Sixteen magnetic flux sheets 9 are provided on the rotor shaft 3. A commutator 10 is provided at the end of the magnetic flux sheets 9. The electric core wires are wound around the magnetic flux sheets 9 in a certain order.
[0031] The commutator 10 includes three metal commutator segments and a plastic bushing. The plastic bushing is arranged on the rotor shaft 3. The metal commutator segments are arranged on the plastic bushing. The electric core wires are connected to the metal commutator segments. The current flows into the metal commutator segments and then flows into the winding to generate a magnetic field to drive the rotor to rotate.
[0032] The large housing 1 is provided with an axial hole for the front end of the rotor shaft 3 to pass through, and a first bearing 6 rotatably connected to the rotor shaft 3 is provided in the axial hole. An oil-blocking gasket 5 is provided on the side of the first bearing 6 away from the rear cover 2. The oil-blocking gasket 5 is arranged in the axial hole and sleeved on the rotor shaft 3. The oil-blocking gasket 5 can not only prevent dust from entering the first bearing 6, but also prevent lubricating oil from leaking out of the first bearing 6, so that the first bearing 6 is kept dry and dust is prevented from sticking.
[0033] The rear cover 2 is provided with a second bearing 12 rotatably connected to the rear end of the rotor shaft 3 , and an output gear 4 is coaxially provided at the end of the rotor shaft 3 away from the rear cover 2 . The rear cover 2 is provided with two brushes 11 rotatably contacting the metal commutator segments of the commutator 10 .
[0034] This DC motor provides a relatively small torque, and too many metal commutator segments will reduce the working efficiency of the DC motor and increase the cost, so the commutator 10 includes three metal commutator segments, which are the minimum number without dead points, and maximize the efficiency without affecting the torque.
[0035] The utility model has the following beneficial effects:
[0036] The oil-blocking gasket 5 has the effect of preventing dust and preventing the lubricating oil from leaking from the first bearing 6, preventing the rotor shaft 3 and the first bearing 6 from being adhered to dust, which causes the rotation resistance to increase, and preventing dust and impurities from entering the motor, thereby reducing the pollution and corrosion inside the motor, protecting the internal components of the motor, extending their service life, reducing the maintenance work inside the motor, reducing the maintenance cost and downtime, and ensuring work efficiency;
[0037] The first bearing 6 and the second bearing 12 can reduce the friction between the moving parts inside the motor, thereby reducing wear, helping to extend the service life of the motor, reducing maintenance requirements, improving running smoothness, stabilizing the axis of the rotating parts of the motor, ensuring that they rotate in a smooth manner, helping to reduce vibration and noise, and improving the running smoothness of the motor.
[0038] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.
Claims
1. A DC torque motor, It is characterized in that include: The large, interconnected chassis and rear cover; Axis hole, provided on the large housing; The rotor shaft has a front end and a rear end which are rotatably connected to the large casing and the rear cover respectively; An output gear, arranged on the rotor shaft; Wherein, a first bearing rotatably connected to the rotor shaft is provided in the shaft hole, and an oil baffle gasket is provided on the side of the first bearing away from the rear cover. The oil baffle gasket is arranged in the shaft hole and sleeved on the rotor shaft.
2. The DC torque motor according to claim 1, It is characterized in that The rotor shaft is provided with 16 magnetic flux sheets, the ends of the magnetic flux sheets are provided with commutators, and the magnetic flux sheets are wound with electric core wires.
3. The DC torque motor according to claim 2, It is characterized in that The commutator comprises three metal commutator segments and a plastic bushing, wherein the plastic bushing is arranged on the rotor shaft, the metal commutator segments are arranged on the plastic bushing, and the electric core wires are connected to the metal commutator segments.
4. The DC torque motor according to claim 3, It is characterized in that Two brushes are arranged in the rear cover and are in rotational contact with the metal commutator segments of the commutator.
5. The DC torque motor according to claim 1, It is characterized in that The large housing has two symmetrical inner curved surfaces, and a permanent magnet is respectively arranged on the two inner curved surfaces.
6. The DC torque motor according to claim 5, It is characterized in that A U-shaped magnetic clamping pin is arranged between the two permanent magnets, and the magnetic clamping pin is clamped between the large casing and the rear cover.
7. The DC torque motor according to claim 1, It is characterized in that The rear cover is provided with a second bearing which is rotatably connected to the rear end of the rotor shaft.