Linear through stepping motor with radial clearance control

Abstract

The utility model belongs to the technical field of stepping motors, and particularly relates to a linear through stepping motor with radial clearance control, which comprises an internal thread shaft with steps and a rotor iron core sleeved on the internal thread shaft. The stator iron core sleeves the outer side of the rotor iron core and is magnetically coupled with the rotor iron core; the bearings are arranged at the two ends of the internal thread shaft in a sleeving mode and make contact with the steps of the internal thread shaft; the front end cover and the rear end cover are arranged at two ends of the stator core; wherein the two bearings are respectively positioned in the front end cover and the rear end cover; according to the linear through stepping motor with the radial clearance control function, the pre-tightening nut is matched with the rear end cover to enable the two bearings to abut against the internal thread shaft when the pre-tightening nut is screwed, so that the radial clearance is controlled, the stability of the rotor core during rotation is improved, and the effect of preventing the rotor core from shaking is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of stepping motors, and in particular relates to a linear through-type stepping motor with radial clearance control. Background Art

[0002] A stepper motor is an electric motor that converts an electrical pulse signal into a corresponding angular displacement or linear displacement. Each time a pulse signal is input, the rotor rotates an angle or moves forward one step. The output angular displacement or linear displacement is proportional to the number of input pulses, and the speed is proportional to the pulse frequency. With the development of the times, users have higher and higher requirements for the reliability of motor operation, so stepper motors with good data control characteristics are widely used.

[0003] After the stepper motor is assembled, there is a certain gap between the screw and the nut, which causes the motor rotor to shake to a certain extent, causing a corresponding impact on the bearing, damaging the quality of the bearing, causing the stepper motor to make noise during use, and affecting the user experience.

[0004] Therefore, in order to solve the above problems, it is necessary to design a linear through-stepping motor with radial clearance control. Utility Model Content

[0005] The utility model aims to provide a linear through-stepping motor with radial clearance control to solve the technical problem that the rotor is easy to shake when rotating.

[0006] In order to solve the above technical problems, the utility model provides a linear through-stepping motor with radial clearance control, comprising:

[0007] An internally threaded shaft with a step and a rotor core sleeved on the internally threaded shaft;

[0008] The stator core is sleeved on the outer side of the rotor core and is magnetically coupled with the rotor core;

[0009] Bearings are sleeved on both ends of the internal thread shaft and are in contact with the steps of the internal thread shaft;

[0010] The front end cover and the rear end cover are arranged at both ends of the stator core;

[0011] The two bearings are respectively located in the front end cover and the rear end cover;

[0012] The pre-tightening nut is engaged with the inner hole of the front end cover;

[0013] The pre-tightening nut is suitable for cooperating with the rear end cover to respectively make the two bearings and the internal threaded shaft abut against each other when tightening, so as to control the radial clearance.

[0014] Furthermore, a first placement portion is provided in the rear end cover; wherein

[0015] The first placement portion is suitable for placing any bearing; and

[0016] The first placement portion abuts against the bearing.

[0017] Furthermore, a second placement portion is provided in the front end cover;

[0018] The second placement portion is suitable for placing another bearing.

[0019] Furthermore, a gasket is provided in the second placement portion; wherein

[0020] The gasket is suitable for abutting against the bearing when the pre-tightening nut is tightened.

[0021] Furthermore, a screw rod is meshed inside the internal threaded shaft; wherein

[0022] The screw rod passes through the front end cover and the rear end cover.

[0023] Furthermore, a sleeve is provided on the outer side of the screw rod; wherein

[0024] The sleeve is engaged with the inner wall of any end of the internal threaded shaft.

[0025] Furthermore, the outer side of the screw rod is provided with two sets of sleeves;

[0026] The two sets of sleeves are respectively engaged with the inner walls at both ends of the internal thread shaft.

[0027] Furthermore, the same nameplate is provided on the top of the stator core, the front cover and the rear cover;

[0028] The nameplate is suitable for indicating product information.

[0029] The beneficial effects of the utility model are:

[0030] (I) The utility model controls the radial clearance by tightening the pre-tightening nut, which meshes with the inner hole of the front end cover, so as to press the gasket, bearing, internal threaded shaft, bearing and rear end cover in sequence. At the same time, by setting a kit, the clearance between the internal threaded shaft and the screw is compensated, thereby achieving the effect of improving the stability of the rotor core during rotation and preventing the rotor core from shaking.

[0031] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a cross-sectional view of a preferred embodiment of the utility model as a whole;

[0035] Figure 2 The explosion of the preferred embodiment of the utility model is Figure 1 ;

[0036] Figure 3 The explosion of the preferred embodiment of the utility model is Figure 2 ;

[0037] Figure 4 It is a stereogram of an overall preferred embodiment of the utility model.

[0038] In the figure:

[0039] Internal threaded shaft 1, step 101, rotor core 2, stator core 3, bearing 4, front end cover 5, second placement portion 501, rear end cover 6, first placement portion 601, pre-tightening nut 7, gasket 8, screw rod 9, kit 10, nameplate 11. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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. Example 1

[0041] like Figures 1 to 4 As shown, this embodiment provides a linear through-stepping motor with radial clearance control, comprising:

[0042] An internally threaded shaft 1 with a step 101 and a rotor core 2 sleeved on the internally threaded shaft 1; a stator core 3, sleeved on the outside of the rotor core 2 and magnetically coupled with the rotor core 2; bearings 4 sleeved on both ends of the internally threaded shaft 1, which are in contact with the step 101 of the internally threaded shaft 1; a front end cover 5 and a rear end cover 6 arranged at both ends of the stator core 3; wherein the two bearings 4 are respectively located in the front end cover 5 and the rear end cover 6; a pre-tightening nut 7, meshing with the inner hole of the front end cover 5; wherein the pre-tightening nut 7 is suitable for cooperating with the rear end cover 6 when tightening to make the two bearings 4 and the internally threaded shaft 1 respectively abut against each other, so as to control the radial clearance; wherein two steps 101 are provided as the most preferred, so as to abut against the two bearings 4 respectively; wherein the rotor core 2 is preferably a rotor core 2 with magnetic steel; wherein the front end cover 5 and the rear end cover 6 are preferably connected to the stator core 3 by bolts, so as to facilitate maintenance and repair.

[0043] A first placement portion 601 is disposed in the rear end cover 6 ; wherein the first placement portion 601 is suitable for placing any bearing 4 ; and the first placement portion 601 abuts against the bearing 4 .

[0044] A second placement portion 501 is disposed in the front end cover 5 ; wherein the second placement portion 501 is suitable for placing another bearing 4 .

[0045] A gasket 8 is disposed in the second placement portion 501 ; wherein the gasket 8 is adapted to abut against the bearing 4 when the pre-tightening nut 7 is tightened; by disposing the gasket 8 , the effect of preventing the pre-tightening nut 7 from automatically loosening is achieved.

[0046] A screw rod 9 is meshed inside the internal threaded shaft 1 ; wherein the screw rod 9 passes through the front end cover 5 and the rear end cover 6 .

[0047] The outer side of the screw rod 9 is sleeved with a sleeve 10; wherein the sleeve 10 is engaged with the inner wall of any end of the internal threaded shaft 1; by providing the sleeve 10, the effect of preventing the rotor core 2 from driving the internal threaded shaft 1 to shake is achieved.

[0048] The outer side of the screw rod 9 is sleeved with two sleeves 10; wherein the two sleeves 10 are respectively engaged with the inner walls at both ends of the internal threaded shaft 1; by providing the two sleeves 10, the rotor core 2 drives the internal threaded shaft 1 to rotate more stably.

[0049] The same nameplate 11 is provided on the top of the stator core 3, the front cover 5 and the rear cover 6;

[0050] The nameplate 11 is suitable for indicating product information.

[0051] In this embodiment, by tightening the pre-tightening nut 7, the pre-tightening nut 7 engages with the inner hole of the front end cover 5 to sequentially press the gasket 8, the bearing 4, the internally threaded shaft 1, the bearing 4 and the rear end cover 6 to control the radial clearance. At the same time, by setting the kit 10, the clearance between the internally threaded shaft 1 and the screw 9 is compensated, thereby achieving the effect of improving the stability of the rotor core 2 during rotation to prevent the rotor core 2 from shaking.

[0052] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0053] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0055] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A linear through-stepping motor with radial clearance control, characterized in that: include: An internally threaded shaft (1) provided with a step (101) and a rotor core (2) sleeved on the internally threaded shaft (1); A stator iron core (3) is sleeved on the outer side of the rotor iron core (2) and is magnetically coupled to the rotor iron core (2); Bearings (4) sleeved on both ends of the internally threaded shaft (1) and in contact with the step (101) of the internally threaded shaft (1); A front cover (5) and a rear cover (6) are arranged at both ends of the stator core (3); wherein The two bearings (4) are respectively located in the front end cover (5) and the rear end cover (6); The pre-tightening nut (7) is meshed with the inner hole of the front end cover (5); wherein The pre-tightening nut (7) is adapted to cooperate with the rear end cover (6) when tightened to respectively cause the two bearings (4) and the internally threaded shaft (1) to abut against each other, so as to control the radial clearance.

2. The linear through-type stepping motor with radial clearance control according to claim 1, characterized in that: A first placement portion (601) is provided in the rear end cover (6); wherein The first placement portion (601) is suitable for placing any bearing (4); and The first placement portion (601) abuts against the bearing (4).

3. The linear through-type stepping motor with radial clearance control as claimed in claim 2, characterized in that: A second placement portion (501) is provided inside the front end cover (5); wherein The second placement portion (501) is suitable for placing another bearing (4).

4. The linear through-type stepping motor with radial clearance control as claimed in claim 3, characterized in that: A gasket (8) is provided in the second placement portion (501); wherein The gasket (8) is suitable for abutting against the bearing (4) when the pre-tightening nut (7) is tightened.

5. The linear through-type stepping motor with radial clearance control as claimed in claim 4, characterized in that: The internal threaded shaft (1) is internally meshed with a screw rod (9); wherein The screw rod (9) passes through the front end cover (5) and the rear end cover (6).

6. The linear through-type stepping motor with radial clearance control as claimed in claim 5, characterized in that: The outer side of the screw rod (9) is provided with a sleeve (10); wherein The sleeve (10) is meshed with the inner wall of any one end of the internally threaded shaft (1).

7. The linear through-type stepping motor with radial clearance control as claimed in claim 5, characterized in that: The outer side of the screw rod (9) is provided with two sets (10); wherein The two sets (10) are respectively engaged with the inner walls at both ends of the internal threaded shaft (1).

8. The linear through-type stepping motor with radial clearance control as claimed in claim 5, characterized in that: The same nameplate (11) is provided on the top of the stator core (3), the front cover (5) and the rear cover (6); wherein The nameplate (11) is suitable for indicating product information.

Images