Low-noise deceleration permanent magnet stepping motor

Abstract

The utility model discloses a low noise deceleration permanent magnet type stepping motor, which comprises a motor body, an output shaft arranged on the motor body and a bearing member matched with the output shaft, the motor body is provided with an outer end cover matched with the motor body, and the outer end cover is provided with an oil guide disc. A bearing hole for mounting a bearing piece is formed in the oil guide disc; an oil tank used for storing lubricating oil is arranged at the top of the oil guide disc, and an oil storage groove which is annularly formed is formed in the oil guide disc; the utility model relates to the technical field of stepping motors. According to the low-noise deceleration permanent magnet stepping motor, the plugging block moves towards the electromagnet in an arc-shaped manner, so that the plugging block can unplug the oil inlet of the oil guide through hole, and meanwhile, the piston block connected with the plugging block through the arc rod can push lubricating oil, so that the lubricating oil can flow to the oil guide through hole from the oil storage tank; and the oil flows to the bearing piece from the oil outlet end of the oil guide through hole, so that the oil injection work is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of stepper motors, in particular to a low-noise speed-reducing permanent-magnet stepper motor. Background Art

[0002] Permanent magnet stepper motor, also called PM stepper motor, uses permanent magnets in the rotor. The stator of this stepper motor is stamped into claw-shaped tooth poles, and the rotor uses radial multi-pole magnetized permanent magnets. This motor is low-cost. Principle: The magnetic field generated by the coil current direction repels the rotor magnetic field, thereby causing the motor to rotate forward / reverse.

[0003] A stepper motor disclosed in patent number "201120548911.X" includes a housing and a stator and a rotor arranged in the housing. The stepper motor also includes a wiring terminal, the wiring terminal is fixedly connected to the stator, and the wiring terminal is electrically connected to the stator. Compared with the prior art, the device avoids direct injection molding of wires, and can use general room temperature wires, which reduces costs and avoids the risk of wire breakage. At the same time, the stator with wiring terminals can be equipped with various different wires, so it has the advantages of improved versatility and reduced processing and management costs;

[0004] However, the stepper motor must ensure the lubrication of the bearings during operation to work properly. After a long period of operation, the lubrication performance between the bearings and the output shaft of some stepper motors decreases, resulting in a large friction resistance between the two, which leads to a certain noise during operation. If lubricating oil is not added for a long time, the stepper motor is easily damaged due to friction resistance. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a low-noise deceleration permanent magnet stepper motor, which solves the problem that the lubrication performance between the bearing and the output shaft of some stepper motors decreases due to long-term operation, resulting in a large friction resistance between the two, and thus a certain noise during operation. In addition, if lubricating oil is not added for a long time, the stepper motor is easily damaged due to friction resistance.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: a low-noise reduction permanent magnet stepping motor, comprising a motor body, an output shaft arranged on the motor body and a bearing member matched with the output shaft, the motor body is equipped with an outer end cover adapted to the motor body, the outer end cover is equipped with an oil guide plate, and the oil guide plate is provided with a bearing hole for the bearing member to be installed;

[0007] An oil tank for storing lubricating oil is provided on the top of the oil guide plate, an annular oil storage groove is provided in the oil guide plate, an oil delivery channel connecting the oil supply tank and the oil storage groove is provided in the oil guide plate, an oil guide through hole which is connected to the bearing hole and guides the lubricating oil in the oil storage groove to the bearing part is provided in the oil guide plate, and an oil pushing assembly which pushes the lubricating oil into the oil guide through hole is provided in the oil storage groove.

[0008] Preferably, the oil pushing assembly includes a fixed arc block arranged in the oil storage tank, the oil storage tank is provided with a sealing block which slides along the oil storage tank and seals the oil inlet end of the oil guide through hole, one side of the sealing block is connected to a piston block which pushes the lubricating oil and is arranged in an arc shape through an arc rod, and a driving member for driving the sealing block to move is provided between the sealing block and the fixed arc block.

[0009] Preferably, the driving member includes a positioning magnet arranged on the other side of the blocking block, and one end of the fixed arc block is provided with an electromagnet that cooperates with the positioning magnet.

[0010] Preferably, a return spring for returning the piston block is provided at the other end of the fixed arc block.

[0011] Preferably, an inclined block arranged obliquely downward is provided at the inner bottom end of the oil tank, and an oil outlet communicated with the oil delivery channel is provided at the lowest end of the inclined block.

[0012] Preferably, the outer surfaces of the blocking block and the piston block are both arranged to fit the inner wall of the oil storage tank, and a quantitative cavity for quantitatively storing the lubricating oil is formed between the blocking block and the piston block.

[0013] Preferably, sealing covers for sealing the bearing holes are provided on both sides of the oil guide plate.

[0014] Preferably, two mounting seats for mounting the motor body are provided at the bottom of the motor body, and rubber shock-absorbing pads for buffering and absorbing shock of the motor body are provided at the bottom of the mounting seats.

[0015] Beneficial Effects

[0016] The utility model provides a low-noise deceleration permanent magnet stepping motor. Compared with the prior art, it has the following beneficial effects:

[0017] (1) In the low-noise deceleration permanent magnet stepper motor, at the moment when the motor body is powered on, the electromagnet becomes magnetic due to the power supply, and thus a magnetic attraction force is generated between the electromagnet and the positioning magnet, thereby driving the blocking block to move in an arc shape toward the electromagnet, so that the blocking block can release the blockage of the oil inlet of the oil guide hole. At the same time, the piston block connected to the blocking block through the arc rod can push the lubricating oil stored in a quantitative manner between the blocking block and the piston block, thereby allowing the lubricating oil to flow from the oil storage tank to the oil guide hole, and then flow from the oil outlet end of the oil guide hole to the bearing part, thereby completing the oil filling work, which can effectively increase the lubricity between the bearing part and the output shaft, thereby effectively preventing the noise generated by the friction resistance between the two. At the same time, because a certain amount of lubricating oil is quantitatively injected before work, it can prevent damage due to friction resistance, thereby greatly extending the service life of the entire device.

[0018] (2) After the low-noise deceleration permanent magnet stepper motor is finished working, because the electromagnet is in an unpowered state, there is no magnetic attraction force between the electromagnet and the positioning magnet, and under the traction of the reset spring, the integrated sealing block and the piston block can be driven to reset, and then the lubricating oil in the oil tank can flow into the oil delivery channel through the inclined block and the oil outlet, and finally flow from the oil outlet end of the oil delivery channel into the oil storage tank and the quantitative cavity formed between the sealing block and the piston block, which is convenient for the next oil filling of the bearing.

[0019] (3) The low-noise deceleration permanent magnet stepper motor is easy to install on the motor body by setting a mounting seat. At the same time, the rubber shock-absorbing pad can provide a certain buffering and shock-absorbing effect on the motor body after installation. Because it has a certain shock-absorbing effect, it can also achieve a noise reduction effect to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a low-noise deceleration permanent magnet stepping motor of the utility model;

[0021] Figure 2 This is a disassembled diagram of the sealing cover and the bearing hole of the utility model;

[0022] Figure 3 It is a schematic diagram of the interior of the oil guide plate of the utility model.

[0023] In the figure: 1. motor body; 2. output shaft; 3. bearing member; 4. outer end cover; 5. oil guide plate; 6. bearing hole; 7. oil tank; 8. oil storage tank; 9. oil delivery channel; 10. oil guide hole; 11. fixed arc block; 12. blocking block; 13. piston block; 14. positioning magnet; 15. electromagnet; 16. reset spring; 17. tilting block; 18. oil outlet; 19. sealing cover; 20. mounting seat; 21. rubber shock-absorbing pad; 22. arc rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model provides two technical solutions:

[0026] Figure 1-3 The first embodiment is shown: a low-noise reduction permanent magnet stepping motor, comprising a motor body 1, an output shaft 2 arranged on the motor body 1, and a bearing member 3 matched with the output shaft 2, an outer end cover 4 matched with the motor body 1 is installed on the motor body 1, an oil guide plate 5 is installed on the outer end cover 4, and a bearing hole 6 for mounting the bearing member 3 is provided on the oil guide plate 5;

[0027] An oil tank 7 for storing lubricating oil is provided on the top of the oil guide plate 5, an annular oil storage tank 8 is provided in the oil guide plate 5, an oil delivery channel 9 is provided in the oil guide plate 5 for connecting the oil supply tank 7 with the oil storage tank 8, an oil guide through hole 10 is provided in the oil guide plate 5 for connecting with the bearing hole 6 and guiding the lubricating oil in the oil storage tank 8 to the bearing member 3, and an oil pushing component is provided in the oil storage tank 8 for pushing the lubricating oil into the oil guide through hole 10.

[0028] Among them, the oil pushing assembly includes a fixed arc block 11 arranged in the oil storage tank 8, and the oil storage tank 8 is provided with a sealing block 12 which slides along the oil storage tank 8 and seals the oil inlet end of the oil guide hole 10. One side of the sealing block 12 is connected to a piston block 13 which pushes the lubricating oil and is arranged in an arc shape through an arc rod 22, and a driving member for driving the sealing block 12 to move is provided between the sealing block 12 and the fixed arc block 11.

[0029] The driving member includes a positioning magnet 14 arranged on the other side of the blocking block 12 , and an electromagnet 15 matched with the positioning magnet 14 is arranged at one end of the fixed arc block 11 .

[0030] The other end of the fixed arc block 11 is provided with a return spring 16 for returning the piston block 13 .

[0031] The inner bottom end of the oil tank 7 is provided with an inclined block 17 which is arranged to be inclined downward, and the lowest end of the inclined block 17 is provided with an oil outlet 18 which is communicated with the oil delivery channel 9 .

[0032] The outer surfaces of the blocking block 12 and the piston block 13 are both arranged to fit the inner wall of the oil storage tank 8 , and a quantitative cavity for quantitatively storing the lubricating oil is formed between the blocking block 12 and the piston block 13 .

[0033] Wherein, sealing covers 19 for sealing the bearing holes 6 are provided on both sides of the oil guide plate 5 .

[0034] At the moment when the motor body 1 is energized, the electromagnet 15 becomes magnetic due to the power supply, and thus a magnetic attraction force occurs between the electromagnet 15 and the positioning magnet 14, thereby driving the blocking block 12 to move in an arc shape toward the electromagnet 15, so that the blocking block 12 can release the blockage of the oil inlet of the oil guide hole 10. At the same time, the arc rod piston block 13 can push the lubricating oil that is quantitatively stored between the blocking block 12 and the piston block 13, so that the lubricating oil can flow from the oil storage tank 8 to the oil guide hole 10, and flow from the oil outlet end of the oil guide hole 10 to the bearing component 3, thereby completing the oil filling work, which can effectively increase the lubricity between the bearing component 3 and the output shaft 2, thereby effectively preventing the noise generated by the friction resistance between the two, and at the same time, because a certain amount of lubricating oil is quantitatively injected before work, it can prevent damage due to friction resistance, greatly extending the entire The service life of the device; and it should be noted that, while the electromagnet 15 is in contact with the positioning magnet 14, the piston block 13 can seal the oil outlet end of the oil delivery channel 9 to prevent the lubricating oil from flowing into the cavity between the piston block 13 and the fixed arc block 11, affecting the subsequent oil filling work; wherein, after the work is completed, because the electromagnet 15 is in an unpowered state, there is no magnetic attraction force between the electromagnet 15 and the positioning magnet 14, and under the traction of the reset spring 16, the integrated blocking block 12 and the piston block 13 can be driven to reset, and then the lubricating oil in the oil tank 7 can flow into the oil delivery channel 9 through the set tilting block 17 and the oil outlet 18, and finally flow from the oil outlet end of the oil delivery channel 9 into the oil storage tank 8 and the quantitative cavity formed between the blocking block 12 and the piston block 13, which is convenient for the next oil filling of the bearing component 3.

[0035] Figure 1 A second embodiment is shown, which mainly differs from the first embodiment in that two mounting seats 20 for mounting the motor body 1 are provided at the bottom of the motor body 1, and rubber shock-absorbing pads 21 for buffering and absorbing shock of the motor body 1 are provided at the bottom of the mounting seats 20.

[0036] The installation of the motor body 1 is facilitated by providing the mounting seat 20. At the same time, the rubber shock-absorbing pad 21 can provide a certain buffering and shock-absorbing effect on the motor body 1 after installation. Because it has a certain shock-absorbing effect, it can also achieve a noise reduction effect to a certain extent.

[0037] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0038] During use, at the moment when the motor body 1 is energized, the electromagnet 15 becomes magnetic due to the power supply, and thus a magnetic attraction force will appear between the electromagnet 15 and the positioning magnet 14, thereby driving the blocking block 12 to move in an arc shape toward the electromagnet 15, so that the blocking block 12 can release the blockage of the oil inlet of the oil guide hole 10. At the same time, the piston block 13 connected to the blocking block 12 through the arc rod 22 can push the lubricating oil that is quantitatively stored between the blocking block 12 and the piston block 13, thereby allowing the lubricating oil to flow from the oil storage tank 8 to the oil guide hole 10, and flow from the oil outlet end of the oil guide hole 10 to the bearing member 3, thereby completing the oil filling work, which can effectively increase the lubricity between the bearing member 3 and the output shaft 2, thereby effectively preventing the noise generated by the friction resistance between the two, and at the same time, because a certain amount of lubricating oil is quantitatively injected before work, thereby preventing damage due to friction resistance, greatly extending the service life of the entire device; and it should be noted that when the electromagnet 15 is in contact with the positioning magnet 14, the piston block 13 can block the oil outlet end of the oil delivery channel 9 to prevent the lubricating oil from flowing into the cavity between the piston block 13 and the fixed arc block 11, affecting the subsequent oil filling work; wherein, after the work is completed, because the electromagnet 15 is in an unpowered state, there is no magnetic attraction force between the electromagnet 15 and the positioning magnet 14, and under the traction of the reset spring 16, the integrated blocking block 12 and the piston block 13 can be driven to reset, and then the lubricating oil in the oil tank 7 can flow into the oil delivery channel 9 through the inclined block 17 and the oil outlet 18, and finally flow from the oil outlet end of the oil delivery channel 9 into the oil storage tank 8 and the quantitative cavity formed between the blocking block 12 and the piston block 13, which is convenient for the next oil filling work of the bearing member 3; wherein, by setting the mounting seat 20, it is convenient to install the motor body 1, and at the same time, because the rubber shock-absorbing pad 21 can play a certain buffering and shock-absorbing effect on the motor body 1 after installation, because it has a certain shock-absorbing effect, it can play a noise reduction effect to a certain extent.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-noise reduction permanent magnet stepping motor, comprising a motor body (1), an output shaft (2) arranged on the motor body (1), and a bearing member (3) matched with the output shaft (2), characterized in that: An outer end cover (4) adapted to the motor body (1) is mounted on the motor body (1), an oil guide plate (5) is mounted on the outer end cover (4), and a bearing hole (6) for mounting the bearing member (3) is provided on the oil guide plate (5); The top of the oil guide plate (5) is provided with an oil tank (7) for storing lubricating oil, the oil guide plate (5) is provided with an annular oil storage groove (8), the oil guide plate (5) is provided with an oil delivery channel (9) for connecting the oil supply tank (7) and the oil storage groove (8), and the oil guide plate (5) is provided with an oil guide through hole (10) which is connected with the bearing hole (6) and guides the lubricating oil in the oil storage groove (8) to the bearing member (3), and the oil storage groove (8) is provided with an oil pushing component for pushing the lubricating oil into the oil guide through hole (10).

2. A low-noise reduction permanent magnet stepping motor according to claim 1, characterized in that: The oil pushing assembly comprises a fixed arc block (11) arranged in an oil storage tank (8), a blocking block (12) sliding along the oil storage tank (8) and blocking the oil inlet end of the oil guide through hole (10) is arranged in the oil storage tank (8), one side of the blocking block (12) is connected to a piston block (13) arranged in an arc shape for pushing lubricating oil via an arc rod (22), and a driving member for driving the blocking block (12) to move is arranged between the blocking block (12) and the fixed arc block (11).

3. A low-noise reduction permanent magnet stepping motor according to claim 2, characterized in that: The driving member comprises a positioning magnet (14) arranged on the other side of the blocking block (12), and one end of the fixed arc block (11) is provided with an electromagnet (15) matching the positioning magnet (14).

4. A low-noise reduction permanent magnet stepping motor according to claim 2, characterized in that: The other end of the fixed arc block (11) is provided with a return spring (16) for returning the piston block (13).

5. The low-noise reduction permanent magnet stepping motor according to claim 1 is characterized in that: The inner bottom end of the oil tank (7) is provided with an inclined block (17) arranged in an inclined downward direction, and the lowest end of the inclined block (17) is provided with an oil outlet (18) communicating with the oil delivery channel (9).

6. A low-noise reduction permanent magnet stepping motor according to claim 2, characterized in that: The outer surfaces of the blocking block (12) and the piston block (13) are both arranged to fit the inner wall of the oil storage tank (8), and a quantitative cavity for quantitatively storing lubricating oil is formed between the blocking block (12) and the piston block (13).

7. The low-noise reduction permanent magnet stepping motor according to claim 1 is characterized in that: Sealing covers (19) for sealing the bearing holes (6) are provided on both sides of the oil guide plate (5).

8. The low-noise reduction permanent magnet stepping motor according to claim 1 is characterized in that: Two mounting seats (20) for mounting the motor body (1) are provided at the bottom of the motor body (1), and rubber shock-absorbing pads (21) for buffering and absorbing shocks of the motor body (1) are provided at the bottom of the mounting seats (20).

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