General assembly tool for permanent magnet direct current torque motor

Abstract

The utility model belongs to the technical field of motor manufacturing, and discloses a permanent magnet direct current torque motor general assembly tool which comprises a base and a lead screw, the lead screw is located in the middle of the base, internal threads are arranged in the base, external threads are arranged on the surface of the lead screw, and the internal threads and the external threads are the same in size and thread pitch so that the lead screw can move up and down in the base. The stator assembly is fixed on the base, the rotor assembly is fixed on the lead screw, and the motor is assembled and disassembled by rotating the lead screw; by adopting the assembling tool, reliable installation of the stator assembly and the rotor assembly of the direct-current torque motor can be ensured, the phenomenon that a permanent magnet of the stator assembly is damaged due to improper installation is avoided, the installation quality of the motor is effectively ensured, and the qualified rate of the motor is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor manufacturing, and in particular relates to a permanent magnet DC torque motor general assembly tool. Background Art

[0002] Permanent magnet DC torque motor is a low-speed DC servo motor, usually used in stalled or low-speed conditions, with high precision, fast response, large stall torque, low no-load speed, etc. It can directly drive the load without any reduction device and has strong overload capacity. Therefore, it is widely used in various radar antenna drives, photoelectric tracking and other high-precision transmission systems and instrument drive devices of general instruments.

[0003] A permanent magnet DC torque motor has a permanent magnet stator assembly and a rotor assembly that work together to convert electricity into torque for positioning and speed control systems.

[0004] Because permanent magnet DC torque motors are generally split-assembly structures, the stator assembly and rotor assembly must be assembled or separated when assembling or disassembling this type of motor with the test fixture. Due to the magnetic attraction of the permanent magnet of the stator assembly, the rotor assembly hits the inner hole of the stator assembly many times during the assembly or separation process, causing the permanent magnet in the inner hole of the stator assembly to break or crack, seriously affecting the normal test of the motor and the normal working state of the motor.

[0005] The air gap of this type of motor is small (that is, the gap between the inner hole of the stator component and the outer circle of the rotor component is small), and usually an insulating paper with a thickness less than the air gap is used between the inner hole of the stator component and the outer circle of the rotor component. However, this method has a poor buffering effect and may still cause damage to the permanent magnets of the stator component, seriously affecting the appearance of the motor. In addition, the shattering of the permanent magnets is prone to produce excess matter, causing the stator component and the rotor component to be swept, and even the insulation resistance to be unqualified. This greatly restricts the normal test efficiency and performance of this type of motor, and seriously affects the normal production cycle of the motor. Summary of the invention

[0006] The purpose of the utility model is to overcome the above-mentioned problems and provide a permanent magnet DC torque motor general assembly tool. The assembly tool can ensure the reliable installation between the stator assembly and the rotor assembly of the permanent magnet DC torque motor, and avoid the breakage of the permanent magnet of the stator assembly due to improper installation.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a permanent magnet DC torque motor general assembly tool, comprising a base, the base is used to install a stator component, a lead screw is arranged in the middle of the base, and the lead screw is used to install a rotor component.

[0009] A further improvement of the utility model is that an internal thread is arranged inside the base, and an external thread is arranged on the surface of the lead screw, and the internal thread and the external thread have the same size and pitch.

[0010] A further improvement of the utility model is that a first threaded hole and an open groove are provided on the base.

[0011] A further improvement of the utility model is that the threaded hole and the opening slot are symmetrically arranged on the central axis of the base.

[0012] A further improvement of the utility model is that a first pressing plate is installed on the base, and a first threaded through hole is opened on the first pressing plate.

[0013] A further improvement of the utility model is that the hole distance of the first threaded hole is consistent with the hole distance of the first threaded through hole.

[0014] A further improvement of the utility model is that the first threaded hole, the stator assembly and the first threaded through hole are fixed by a first fixing screw.

[0015] A further improvement of the utility model is that a second pressing plate is installed on the upper end surface of the lead screw, and a second threaded through hole is arranged on the second pressing plate.

[0016] A further improvement of the utility model is that a second threaded hole is provided on the upper end surface of the lead screw, and the second threaded hole and the second threaded through hole have the same hole distance.

[0017] A further improvement of the utility model is that the second threaded hole, the rotor assembly and the second threaded through hole are fixed by a second fixing screw.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model installs the stator assembly on the base, the rotor assembly on the lead screw, and the lead screw is installed in the middle of the base. The assembly tool can ensure the reliable installation of the stator assembly and the rotor assembly of the DC torque motor, avoid the damage of the permanent magnet of the stator assembly due to improper installation, effectively ensure the installation quality of the motor, and improve the qualified rate of the motor.

[0020] Furthermore, an internal thread is arranged inside the base, and an external thread is arranged on the surface of the lead screw. The internal thread and the external thread have the same size and pitch, so that the lead screw can move up and down in the base.

[0021] Furthermore, a first threaded hole and an open slot are provided on the base. The threaded hole enables the stator assembly to be fixed on the base, and the open slot facilitates the removal of the stator assembly.

[0022] Furthermore, the hole spacing of the first threaded holes is consistent with the hole spacing of the first threaded through holes, so that the first pressing plate and the base can be tightened and fixed to the stator assembly using the first fixing screws.

[0023] Furthermore, a second threaded hole is provided on the upper end surface of the lead screw, and the second threaded hole has the same hole distance as the second threaded through hole, so that the second pressure plate and the lead screw can be tightened to fix the rotor assembly using a second fixing screw.

[0024] Furthermore, a knurled section is provided at the lower end of the lead screw, which can save effort and prevent scratching of the hand when the knurled section of the lead screw is manually screwed, thereby facilitating the screwing in and out of the lead screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the permanent magnet DC torque motor general assembly tool of the utility model;

[0026] Figure 2 It is a schematic diagram of the DC torque motor of the utility model;

[0027] Figure 3 This is a schematic diagram of the screw structure of the utility model;

[0028] Figure 4 This is a top view of the base structure of the utility model;

[0029] Figure 5 It is a top view of the first pressing plate structure of the utility model;

[0030] Figure 6 This is a schematic diagram of the first pressing plate structure of the utility model;

[0031] Figure 7 This is a schematic diagram of the second pressing plate structure of the utility model.

[0032] Among them, 1. base; 2. screw; 3. first pressure plate; 4. first fixing screw; 5. second pressure plate; 6. second fixing screw; 7. stator assembly; 8. rotor assembly; 9. first threaded hole; 10. open slot; 11. first threaded through hole; 12. second threaded hole; 13. second threaded through hole. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to common technical knowledge and conventional means in the field, which should all be included in the protection scope of the present invention.

[0034] See also Figure 1The permanent magnet DC torque motor assembly tool comprises a base 1, a lead screw 2, a first pressing plate 3, a first fixing screw 4, a second pressing plate 5, a second fixing screw 6, a stator assembly 7, a rotor assembly 8, a first threaded hole 9, an open slot 10, a first threaded through hole 11, a second threaded hole 12, and a second threaded through hole 13, wherein:

[0035] A first threaded hole 9 and an open slot 10 are provided on the base 1, and the threaded hole 9 and the open slot 10 are symmetrically arranged on the central axis of the base 1, respectively. The threaded hole 9 can fix the stator assembly 7 on the base 1, and the open slot 10 is convenient for taking out the stator assembly 7. A first pressing plate 3 is installed on the base 1, and the outer circle size of the step of the first pressing plate 3 is clearance-matched with the step hole of the base 1 to ensure that the first pressing plate 3 is reliably positioned in the base 1. A first threaded through hole 11 is provided on the first pressing plate 3, and the hole spacing of the first threaded hole 9 is consistent with the hole spacing of the first threaded through hole 11, so that the first fixing screw 4 can be used to tighten the first pressing plate 3 and the base 1 to fix the stator assembly 7;

[0036] A screw 2 is arranged in the middle of the base 1, an internal thread is arranged inside the base 1, and an external thread is arranged on the surface of the screw 2. The internal thread and the external thread have the same size and pitch, so that the screw can move up and down in the base. The base 1 and the screw 2 have the same small clearance matching positioning dimensions, the same matching thread size and pitch, the outer circle of the positioning step set on the screw 2 matches with the small clearance of the inner hole of the rotor assembly 8, so that the rotor assembly 8 is convenient to be installed on the screw 2, and a second pressing plate 5 is installed on the upper end surface of the screw 2, and a second threaded through hole 13 is arranged on the second pressing plate 5. A second threaded hole 12 is opened on the upper end surface of the screw 2, and the second threaded hole 12 and the second threaded through hole 13 have the same hole pitch, so that the second fixing screw 6 can be used to tighten the second pressing plate 5 and the screw 2 to fix the rotor assembly 8.

[0037] The method for using the permanent magnet DC torque motor assembly tool comprises the following steps:

[0038] Step 1: When the motor needs to be assembled, screw the lead screw 2 into the base 1 clockwise;

[0039] Step 2: Install the stator assembly 7 of the permanent magnet DC torque motor in the positioning hole of the base 1;

[0040] Step 3: put the first pressing plate 3 into the positioning hole of the base 1 to press the upper end surface of the stator assembly 7, tighten the first fixing screw 4, and press the stator assembly 7;

[0041] Step 4: Unscrew the lead screw 2 clockwise until the lower end surface of the outer circle of the lead screw 2 positioning step is higher than the upper end surface of the stator assembly 7;

[0042] Step 5: Place the rotor assembly 8 onto the outer circle of the positioning step of the lead screw 2;

[0043] Step 6: Put the second pressing plate 5 into the upper end surface of the lead screw 2 to press the upper end surface of the rotor assembly 8, tighten the second fixing screw 6 to press the rotor assembly 8;

[0044] Step 7: Rotate the lead screw 2 counterclockwise until the lower end surface of the rotor assembly 8 is substantially flush with the lower end surface of the stator assembly 7, and the permanent magnet DC torque motor is assembled, and the next step of the motor-related experiment is carried out;

[0045] Step 8: When the motor needs to be disassembled, screw the lead screw 2 out clockwise until the lower end surface of the outer circle of the lead screw 2 positioning step is higher than the upper end surface of the stator assembly 7;

[0046] Step nine, loosen and remove the second fixing screw 6 and the second pressing plate 5, and remove the rotor assembly 8;

[0047] Step ten, loosen and remove the first fixing screw 4 and the first pressing plate 5, and remove the stator assembly 7, and the disassembly of the permanent magnet DC torque motor is completed.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field can still modify or replace the specific implementation methods of the present invention. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the claims of the present invention to be approved.

Claims

1. A permanent magnet DC torque motor assembly tool, characterized in that: The invention comprises a base (1), the base (1) is used to install a stator assembly (7), a lead screw (2) is arranged in the middle of the base (1), an internal thread is arranged inside the base (1), an external thread is arranged on the surface of the lead screw (2), the internal thread and the external thread have the same size and pitch, and the lead screw (2) is used to install a rotor assembly (8).

2. A permanent magnet DC torque motor assembly tool according to claim 1, characterized in that: The base (1) is provided with a first threaded hole (9) and an opening groove (10).

3. A permanent magnet DC torque motor assembly tool according to claim 2, characterized in that: The first threaded hole (9) and the opening groove (10) are respectively symmetrically arranged on the central axis of the base (1).

4. A permanent magnet DC torque motor assembly tool according to claim 1, characterized in that: A first pressing plate (3) is mounted on the base (1), and a first threaded through hole (11) is formed on the first pressing plate (3).

5. A permanent magnet DC torque motor assembly tool according to claim 4, characterized in that: The hole spacing of the first threaded holes (9) is consistent with the hole spacing of the first threaded through holes (11).

6. A permanent magnet DC torque motor assembly tool according to claim 4, characterized in that: The first threaded hole (9), the stator assembly (7) and the first threaded through hole (11) are fixed by means of a first fixing screw (4).

7. A permanent magnet DC torque motor assembly tool according to claim 1, characterized in that: A second pressing plate (5) is mounted on the upper end surface of the lead screw (2), and a second threaded through hole (13) is provided on the second pressing plate (5).

8. A permanent magnet DC torque motor assembly tool according to claim 7, characterized in that: A second threaded hole (12) is formed on the upper end surface of the lead screw (2), and the second threaded hole (12) and the second threaded through hole (13) have the same hole distance.

9. A permanent magnet DC torque motor assembly tool according to claim 7, characterized in that: The second threaded hole (12), the rotor assembly (8) and the second threaded through hole (13) are fixed by means of a second fixing screw (6).

Images