Stepping motor convenient to maintain

Abstract

The utility model belongs to the technical field of stepping motors, and particularly relates to a stepping motor convenient to maintain, which comprises a casing, a rear end cover and a front end cover are respectively mounted at the left end and the right end of the casing, a motor shaft is mounted in the casing, a rotor is mounted on the outer side of the motor shaft, a stator is mounted in the casing, and a rotor is mounted on the outer side of the stator. A first mounting hole is formed in the right side of the front end cover, a first bearing is mounted in the first mounting hole and rotationally connected with a motor shaft, a first cover plate is mounted at the right end of the first mounting hole, lubricating grease can be directly added into the first bearing after the first cover plate is detached, and the rear end cover can be directly pulled out by detaching the rear end cover. After the second cover plate is detached, lubricating grease can be added into the second bearing, maintenance operation is quite convenient, after the lubricating grease is added, the first cover plate and the second cover plate are installed, then the rear end cover is installed on the machine shell, and workers can conveniently and rapidly complete maintenance of the bearings of the stepping motor.

Description

Technical Field

[0001] The utility model relates to the field of stepping motors, and particularly to a stepping motor which is convenient for maintenance. Background Technique

[0002] A stepping motor is an open-loop control motor that converts an electrical pulse signal into an angular displacement or a linear displacement. It is the main actuator in a modern digital program control system and is widely used. Under non-overload conditions, the speed and stop position of the motor only depend on the frequency and number of pulse signals, and are not affected by load changes. When the stepping driver receives a pulse signal, it drives the stepping motor to rotate a fixed angle in the set direction, called the "step angle", and its rotation runs step by step at a fixed angle. The angular displacement can be controlled by controlling the number of pulses to achieve the purpose of accurate positioning; at the same time, the speed and acceleration of the motor rotation can be controlled by controlling the pulse frequency to achieve the purpose of speed regulation.

[0003] During the use of a stepping motor, as the use time increases, the lubricating grease effect in the motor bearing continuously deteriorates, which brings adverse effects to the operation of the motor. It is necessary to perform regular maintenance and add lubricating grease to the motor bearing to ensure the more efficient and stable operation of the motor. However, during the use of the existing stepping motor, the maintenance operation is relatively inconvenient, and the staff needs to spend a lot of time installing and disassembling the stepping motor, which brings inconvenience to the staff. Therefore, the utility model provides a stepping motor which is convenient for maintenance. Content of the Utility Model

[0004] The purpose of the utility model is to provide a stepping motor which is convenient for maintenance, so as to solve the problem that during the use of the existing stepping motor, the maintenance operation is relatively inconvenient, and the staff needs to spend a lot of time installing and disassembling the stepping motor, which brings inconvenience to the staff as mentioned in the above background technique.

[0005] To achieve the above object, the utility model provides the following technical solution: a stepping motor convenient for maintenance, including a machine shell, a rear end cover and a front end cover are respectively installed at the left and right ends of the machine shell, a motor shaft is installed in the machine shell, a rotor is installed outside the motor shaft, a stator is installed in the machine shell, a first installation hole is opened on the right side of the front end cover, a first bearing is installed in the first installation hole, and the first bearing is rotationally connected with the motor shaft. A first cover plate is installed at the right end of the first installation hole. A second installation hole is opened at the right end of the rear end cover, a second bearing is installed in the second installation hole, a docking seat is sleeved in the second bearing, a conical docking head is arranged at the left end of the motor shaft, a docking hole is opened in the middle of the docking seat, and the conical docking head is inserted into the docking hole. A limiting plate is arranged on the outer wall of the right end of the docking seat, and the limiting plate contacts the right end of the inner ring of the second bearing. The right end of the second installation hole is connected with a second cover plate by bolts.

[0006] Preferably, there is a gap between the right end of the docking seat and the second cover plate.

[0007] Preferably, slots are evenly opened on the outer wall of the conical docking head, and inserting blocks adapted to the slots are arranged on the inner wall of the docking hole, and the inserting blocks are inserted into the slots.

[0008] Preferably, a cable is installed outside the rear end cover, and the cable is electrically connected with the stator.

[0009] Preferably, a fixing groove is opened at the right end of the first installation hole, and the first cover plate is fixed in the fixing groove by bolts.

[0010] Preferably, a shaft shoulder is arranged on the right side of the motor shaft, and the first bearing is installed at the shaft shoulder.

[0011] Preferably, snap rings are installed between the first installation hole and the second installation hole.

[0012] Preferably, the outer wall diameter of the limiting plate is smaller than the outer wall diameter of the inner ring of the second bearing.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1) In the utility model, after removing the first cover plate, grease can be directly added to the first bearing. By removing the rear end cover, the rear end cover can be directly pulled out. After removing the second cover plate, grease can be added to the second bearing. The maintenance operation is very convenient. After the grease is added, install the first cover plate and the second cover plate, and then install the rear end cover onto the machine shell, enabling the staff to conveniently and quickly complete the maintenance of the bearings of the stepping motor;

[0015] 2) By providing the docking seat, under the action of the second bearing, the docking seat can rotate. A conical docking head is provided at the left end of the motor shaft. Inserting the conical docking head into the docking hole in the middle of the docking seat can complete the connection between the motor shaft and the second bearing, which is convenient for installation and disassembly;

[0016] 3) Through the cooperation of the insertion block and the insertion slot, the stability after the connection between the conical docking head and the docking seat is improved, enabling the motor shaft to work more stably;

[0017] 4) Under the action of the limiting plate, the extreme position at the left end of the docking seat can be limited. With the setting of the shaft shoulder, the motor shaft is effectively limited, improving the stability of the stepper motor during operation. Description of the Drawings

[0018] Figure 1 is the first schematic diagram of the structure of the present utility model;

[0019] Figure 2 is the second schematic diagram of the structure of the present utility model;

[0020] Figure 3 is the schematic diagram of the cable structure of the present utility model;

[0021] Figure 4 is the schematic cross-sectional structure of the present utility model;

[0022] Figure 5 is the schematic cross-sectional structure of the rear end cover of the present utility model.

[0023] In the figure: 1, housing; 2, rear end cover; 3, front end cover; 4, motor shaft; 5, cable; 6, first mounting hole; 7, first bearing; 8, first cover plate; 9, stator; 10, rotor; 11, shaft shoulder; 12, fixing groove; 13, second mounting hole; 14, second bearing; 15, second cover plate; 16, docking seat; 17, limiting plate; 18, conical docking head; 19, insertion slot; 20, insertion block; 21, docking hole. Detailed Embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Embodiment:

[0028] Please refer to Figures 1-5 , the present utility model provides a technical solution: a stepping motor convenient for maintenance, including a housing 1. Rear end covers 2 and front end covers 3 are respectively installed at the left and right ends of the housing 1. The rear end cover 2 and the front end cover 3 are fixed on the housing 1 by bolts. A motor shaft 4 is installed in the housing 1. A rotor 10 is installed outside the motor shaft 4. A stator 9 is installed in the housing 1. The positions of the rotor 10 and the stator 9 are adapted. After the stator 9 is powered on, it drives the rotor 10 to rotate, so that the motor shaft 4 rotates. A first mounting hole 6 is opened on the right side of the front end cover 3. A first bearing 7 is installed in the first mounting hole 6, and the first bearing 7 is rotationally connected to the motor shaft 4. A first cover plate 8 is installed at the right end of the first mounting hole 6. The right side of the motor shaft 4 passes through the first cover plate 8. A second mounting hole 13 is opened at the right end of the rear end cover 2. A second bearing 14 is installed in the second mounting hole 13. A docking seat 16 is sleeved in the second bearing 14. The transition fit is between the docking seat 16 and the inner ring of the second bearing 14. A tapered docking head 18 is provided at the left end of the motor shaft 4. The tapered docking head 18 is in the shape of a cone with a smaller left side and a larger right side. A docking hole 21 is opened in the middle of the docking seat 16. The tapered docking head 18 is inserted into the docking hole 21. A limiting plate 17 is provided on the outer wall at the right end of the docking seat 16. The limiting plate 17 contacts the right end of the inner ring of the second bearing 14 to limit the extreme position of the installation of the docking seat 16 and ensure stable positioning and installation. The right end of the second mounting hole 13 is connected to a second cover plate 15 by bolts.

[0029] There is a gap between the right end of the docking seat 16 and the second cover plate 15 to avoid the generation of frictional force due to contact.

[0030] The outer wall of the conical docking head 18 is evenly provided with slots 19, and the inner wall of the docking hole 21 is provided with insertion blocks 20 adapted to the slots 19. The insertion blocks 20 are inserted into the slots 19 to improve the stability after connection.

[0031] A cable 5 is installed on the outside of the rear end cover 2, and the cable 5 is electrically connected to the stator 9.

[0032] A fixing groove 12 is provided at the right end of the first mounting hole 6, and the first cover plate 8 is fixed in the fixing groove 12 by bolts, which is convenient for quickly positioning and installing the first cover plate 8.

[0033] A shaft shoulder 11 is provided on the right side of the motor shaft 4, and the first bearing 7 is installed at the shaft shoulder 11 to limit the position of the motor shaft 4.

[0034] Circlips are installed between the first mounting hole 6 and the second mounting hole 13 to limit the first bearing 7 and the second bearing 14.

[0035] The outer wall diameter of the limiting plate 17 is smaller than the outer wall diameter of the inner ring of the second bearing 14, so as to prevent the limiting plate 17 from protruding out of the inner ring of the second bearing 14 and affecting the addition of grease.

[0036] Working principle: When maintaining the bearings of the stepping motor, after removing the first cover plate 8, grease can be directly added to the first bearing 7. By removing the rear end cover 2, the rear end cover 2 can be directly pulled out. After removing the second cover plate 15, grease can be added to the second bearing 14. The maintenance operation is very convenient. After the grease is added, install the first cover plate 8 and the second cover plate 15, and then install the rear end cover 2 onto the housing 1, enabling the staff to conveniently and quickly complete the maintenance of the bearings of the stepping motor. Through the setting of the docking seat 16, the docking seat 16 can rotate under the action of the second bearing 14. A conical docking head 18 is provided at the left end of the motor shaft 4. Insert the conical docking head 18 into the docking hole 21 in the middle of the docking seat 16 to complete the connection between the motor shaft 4 and the second bearing 14. The installation and disassembly are convenient. Through the cooperation of the insertion blocks 20 and the slots 19, the stability after the connection of the conical docking head 18 and the docking seat 16 is improved, enabling the motor shaft 4 to work more stably. Under the action of the limiting plate 17, the limit position of the left end of the docking seat 16 can be limited. With the setting of the shaft shoulder 11, the motor shaft 4 is effectively limited, improving the working stability of the stepping motor.

[0037] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced by the present utility model, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0038] Although the embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A stepper motor that is easy to maintain, comprising a housing (1), characterized in that: The housing (1) is provided with a rear end cover (2) and a front end cover (3) at the left and right ends thereof, respectively; a motor shaft (4) is provided in the housing (1); a rotor (10) is provided outside the motor shaft (4); a stator (9) is provided in the housing (1); a first mounting hole (6) is provided on the right side of the front end cover (3); a first bearing (7) is provided in the first mounting hole (6); and the first bearing (7) and the motor shaft (4) are rotatably connected; a first cover plate (8) is provided on the right end of the first mounting hole (6); and a second mounting hole (13) is provided on the right end of the rear end cover (2). ), a second bearing (14) is installed in the second mounting hole (13), a docking seat (16) is sleeved in the second bearing (14), a conical docking joint (18) is arranged at the left end of the motor shaft (4), a docking hole (21) is opened in the middle of the docking seat (16), the conical docking joint (18) is inserted into the docking hole (21), a limit plate (17) is arranged on the outer wall of the right end of the docking seat (16), the limit plate (17) contacts the right end of the inner ring of the second bearing (14), and the right end of the second mounting hole (13) is connected to the second cover plate (15) by bolts.

2. The stepper motor easy to maintain according to claim 1, characterized in that: There is a gap between the right end of the docking seat (16) and the second cover plate (15).

3. The stepping motor easy to maintain according to claim 1, characterized in that: The outer wall of the conical butt joint (18) is evenly provided with slots (19), and the inner wall of the butt hole (21) is provided with an insert block (20) adapted to the slots (19), and the insert block (20) is inserted into the slots (19).

4. The stepping motor easy to maintain according to claim 1, characterized in that: A cable (5) is installed on the outside of the rear end cover (2), and the cable (5) is electrically connected to the stator (9).

5. The stepping motor easy to maintain according to claim 1, characterized in that: A fixing groove (12) is provided at the right end of the first mounting hole (6), and the first cover plate (8) is fixed in the fixing groove (12) by means of bolts.

6. The stepping motor easy to maintain according to claim 1, characterized in that: A shaft shoulder (11) is provided on the right side of the motor shaft (4), and the first bearing (7) is installed on the shaft shoulder (11).

7. The stepping motor easy to maintain according to claim 1, characterized in that: A retaining spring is installed between the first mounting hole (6) and the second mounting hole (13).

8. The stepping motor easy to maintain according to claim 1, characterized in that: The outer wall diameter of the limiting plate (17) is smaller than the outer wall diameter of the inner ring of the second bearing (14).

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