Linear rotation composite double-operation trapezoidal lead screw stepping motor

Abstract

The invention relates to a linear rotation composite double-operation trapezoidal lead screw stepping motor. Comprising a hexagonal telescopic rod, a trapezoidal screw rod, a guide sleeve, a connecting seat, a first front end cover, a first rear end cover, a rotor iron core, a first stator iron core, a hollow shaft, a bearing, a screw rod copper pipe, a second front end cover, a second rear end cover, a second stator iron core, a first winding and a second winding, a first winding and a second winding are respectively arranged in the first stator iron core and the second stator iron core, the hollow shaft and the rotor iron core are sleeved in the first stator iron core, and the screw rod copper pipe and the rotor iron core are sleeved in the second stator iron core. The motor has the beneficial effects that the first winding drives the hollow shaft to rotate, the second winding drives the screw rod copper pipe to be matched with the trapezoidal screw rod for spiral transmission to do linear motion, and the double-winding driving mode breaks through the limitation of a single function of a traditional motor to achieve the composite operation function of rotation and linear motion of the output shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to a linear-rotary compound dual-operation trapezoidal screw stepper motor. Background Art

[0002] Traditional stepper motors can usually only achieve a single rotary motion or linear motion. In some application scenarios that require both rotary and linear motions, multiple stepper motors often need to be equipped and complex transmission systems such as gears, belts, and chains are used to achieve this. This traditional solution has many drawbacks. It not only increases the cost and volume of the equipment, but also reduces the reliability and control accuracy of the system. The complex transmission structure is also prone to increased energy loss. For example, in the fields of automated production equipment, numerical control machine tools, medical devices, etc., the demand for stepper motors that can simultaneously achieve linear and rotary motions is increasing day by day. Therefore, it is of great practical significance to develop a motor that can simultaneously achieve linear-rotary compound dual-operation. Summary of the Invention

[0003] The purpose of the present invention is to provide a linear-rotary compound dual-operation trapezoidal screw stepper motor to solve the problems raised in the above background art.

[0004] To solve the above technical problems, the present invention provides the following technical solutions: a hexagonal telescopic rod, a trapezoidal screw, a guide sleeve, a connecting seat, a first front end cover, a first rear end cover, a rotor core, a first stator core, a hollow shaft, a bearing, a screw copper tube, a second front end cover, a second rear end cover, a second stator core, a first winding, and a second winding. The trapezoidal screw is sleeved in the guide sleeve, the hollow shaft, and the screw copper tube. The first winding and the second winding are respectively arranged in the first stator core and the second stator core. The hollow shaft and the rotor core are sleeved in the first stator core, and the screw copper tube and the rotor core are sleeved in the second stator core. The hexagonal telescopic rod is sleeved in the guide sleeve. The guide sleeve is provided with a hexagonal inner hole. The first stator core is fixedly installed on the front side of the second stator core through the first rear end cover and the second front end cover.

[0005] Preferably, the first front end cover and the first rear end cover are respectively fixed to the front and rear of the first stator core. The second front end cover is fixedly connected to the first rear end cover. The second front end cover and the second rear end cover are respectively fixed to the front and rear of the second stator core.

[0006] Preferably, bearings are provided in the first front end cover, the first rear end cover, the second front end cover, and the second rear end cover.

[0007] Preferably, the hexagonal telescopic rod is fixedly installed at the end of the trapezoidal screw, and the guide sleeve is fixedly connected to the hollow shaft through the connecting seat.

[0008] Preferably, the bearings are respectively sleeved on the front and rear sides of the hollow shaft and the screw rod copper tube, and a trapezoidal thread is provided inside the screw rod copper tube.

[0009] Beneficial effects:

[0010] The linear-rotary composite double-running trapezoidal screw stepper motor provided by the present invention has the following advantages:

[0011] Through a unique dual-winding drive design, the present invention drives the hollow shaft to rotate by the first winding, and drives the screw rod copper tube to do linear motion in cooperation with the trapezoidal screw through the second winding. The structure is simple and compact. This structure changes the limitation of the single function of traditional stepper motors and realizes the composite operation function of the output shaft rotation and linear motion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 It is a schematic diagram of the overall front view sectional structure of the present invention;

[0014] Figure 2 It is a three-dimensional view of the overall structure of the present invention;

[0015] Figure 3 It is a schematic diagram of the cooperation between the screw rod copper tube and the trapezoidal screw of the present invention;

[0016] Figure 4 It is a schematic diagram of the left view structure of the present invention;

[0017] Figure 5 It is a schematic diagram of the structure of the guide sleeve of the present invention;

[0018] In the figure: 1. Hexagonal telescopic rod, 2. Trapezoidal screw, 3. Guide sleeve, 4. Connecting seat, 5. First front end cover, 6. First rear end cover, 7. Rotor core, 8. First stator core, 9. Hollow shaft, 10. Bearing, 11. Screw rod copper tube, 12. Second front end cover, 13. Second rear end cover, 14. Second stator core, 15. First winding, 16. Second winding. DETAILED DESCRIPTION OF THE INVENTION

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figure 1 , an embodiment provided by the present invention: a linear-rotary compound double-running trapezoidal screw rod stepping motor, comprising: 1. hexagonal telescopic rod, 2. trapezoidal screw rod, 3. guide sleeve, 4. connecting seat, 5. first front end cover, 6. first rear end cover, 7. rotor core, 8. first stator core, 9. hollow shaft, 10. bearing, 11. screw rod copper tube, 12. second front end cover, 13. second rear end cover, 14. second stator core, 15. first winding, 16. second winding. The 2. trapezoidal screw rod is sleeved in the 3. guide sleeve, 9. hollow shaft, 11. screw rod copper tube. The 15. first winding and 16. second winding are respectively arranged in the 8. first stator core and 14. second stator core. The 9. hollow shaft and 7. rotor core are sleeved in the 8. first stator core. The 11. screw rod copper tube and 7. rotor core are sleeved in the 14. second stator core. The 1. hexagonal telescopic rod is sleeved in the 3. guide sleeve. The 3. guide sleeve is provided with a hexagonal inner hole. The 8. first stator core is fixedly installed on the front side of the 14. second stator core through the 6. first rear end cover and 12. second front end cover. The 5. first front end cover and 6. first rear end cover are respectively fixed on the front and rear of the 8. first stator core. The 12. second front end cover is fixedly connected to the 6. first rear end cover. The 12. second front end cover and 13. second rear end cover are respectively fixed on the front and rear of the 14. second stator core. The 5. first front end cover, 6. first rear end cover, 12. second front end cover, 13. second rear end cover are provided with the 10. bearing. The 1. hexagonal telescopic rod is fixedly installed at the end of the 2. trapezoidal screw rod. The 3. guide sleeve is fixedly connected to the 9. hollow shaft through the 4. connecting seat. The 10. bearing is respectively sleeved on the front and rear sides of the 9. hollow shaft and 11. screw rod copper tube. The 11. screw rod copper tube is internally provided with a trapezoidal thread.

[0021] The working principle of the linear-rotary compound double-running trapezoidal screw rod stepping motor provided by the present invention:

[0022] Rotary motion: When current is sequentially applied to the first winding 15 and the second winding 16 on the first stator core 8 and the second stator core 14, a rotating magnetic field is generated simultaneously. This magnetic field can efficiently drive the rotor core 7 to drive the hollow shaft 9 and the lead screw copper tube 11 to rotate. The hollow shaft 9 is fixedly connected to the guide sleeve 3 through the connecting seat 4. The hexagonal telescopic rod 1 is sleeved in the hexagonal hole of the guide sleeve 3. The rotation of the hollow shaft 9 ultimately drives the hexagonal telescopic rod 1 to achieve rotary operation. Since the hexagonal telescopic rod 1 is connected to the trapezoidal lead screw 2, the first winding 15 and the second winding 16 must be driven to rotate synchronously to achieve rotary operation.

[0023] Linear motion: When current is sequentially applied to the second winding 16 on the second stator core 14, a rotating magnetic field is generated. This magnetic field drives the rotor core 7 to drive the lead screw copper tube 11 to rotate. At this time, the first winding 15 is in a power-on self-locking stationary state, and the guide sleeve 3 is fixed and does not rotate. Since there is a trapezoidal thread inside the rotating lead screw copper tube 11 and it cooperates with the trapezoidal lead screw 2 for screw drive, and with the precise guiding effect of the guide sleeve 3 and the hexagonal telescopic rod 1 on the linear motion of the trapezoidal lead screw 2, the trapezoidal lead screw 2 will perform linear motion precisely along the axis.

[0024] Among them, the trapezoidal lead screw 5 and the lead screw copper tube 16 are used for screw drive cooperation. The first front cover, the first rear cover, the second front cover, and the second rear cover are used to fix the first stator core and the second stator core. The bearings are used to assist the rotation of the lead screw copper tube and the hollow shaft. The first stator core, the second stator core 10, the rotor core, the first winding, and the second winding are used to provide a magnetic field. The connecting seat is used to fixedly connect the hollow shaft and the guide sleeve. The guide sleeve is used to prevent the hexagonal telescopic rod from rotating and serves as a guiding function.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A linear-rotation compound double-operation trapezoidal screw stepper motor, comprising a hexagonal telescopic rod (1), a trapezoidal screw (2), a guide sleeve (3), a connecting seat (4), a first front end cover (5), a first rear end cover (6), a rotor core (7), a first stator core (8), a hollow shaft (9), a bearing (10), a screw copper tube (11), a second front end cover (12), a second rear end cover (13), a second stator core (14), a first winding (15), and a second winding (16), wherein the trapezoidal screw (2) is sleeved on the guide sleeve (3), the hollow shaft (9), and the screw copper tube. (11), a first winding (15) and a second winding (16) are respectively arranged in the first stator core (8) and the second stator core (14), the hollow shaft (9) and the rotor core (7) are sleeved in the first stator core (8), the lead screw copper tube (11) and the rotor core (7) are sleeved in the second stator core (14), the hexagonal telescopic rod (1) is sleeved in the guide sleeve (3), and the guide sleeve (3) is provided with a hexagonal inner hole, and the first stator core (8) is fixedly installed on the front side of the second stator core (14) through the first rear end cover (6) and the second front end cover (12).

2. The two-finger mechanical gripper with a through-retractable stepping motor structure according to claim 1 is characterized in that: The first stator core (8) is respectively fixed with a first front end cover (5) and a first rear end cover (6) at the front and rear ends, the second front end cover (12) is fixedly connected to the first rear end cover (6), and the second stator core (14) is respectively fixed with a second front end cover (12) and a second rear end cover (13) at the front and rear ends.

3. The two-finger mechanical gripper with a through-retractable stepping motor structure according to claim 2 is characterized in that: The first front end cover (5), the first rear end cover (6), the second front end cover (12), and the second rear end cover (13) are provided with bearings (10).

4. The two-finger mechanical gripper with a through-retractable stepping motor structure according to claim 3 is characterized in that: The hexagonal telescopic rod (1) is fixedly mounted on the end of the trapezoidal screw rod (2), and the guide sleeve (3) is fixedly connected to the hollow shaft (9) via a connecting seat (4).

5. The two-finger mechanical gripper with a through-retractable stepping motor structure according to claim 4 is characterized in that: The bearing (10) is sleeved on the front and rear sides of the hollow shaft (9) and the lead screw copper tube (11) respectively, and a trapezoidal thread is arranged inside the lead screw copper tube (11).

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