A dual motion motor

Abstract

The present invention relates to a dual-motion motor, comprising a portion providing rotational motion, a portion providing linear motion, and a connecting end cap. The rotational motion driving portion comprises a front end cap (A), a stator (A), a rotor (A), a rotating shaft (A), and a rear end cap (A). The rotating shaft (A) sequentially passes through the front end cap (A), the rotor (A), and the rear end cap (A). The stator (A) is disposed outside the rotor (A) and located between the front end cap (A) and the rear end cap (A). The linear motion driving portion comprises a stator (B), a rotor (B), a front end cap (B), a rotating shaft (B), and a rear end cap (B). The rotating shaft (A) is provided with a through hole for the axially shuttle motion of the rotating shaft (B). The rotating shaft (B) sequentially passes through the through hole of the rotating shaft (B), the connecting end cap, the front end cap (B), the rotor (B), and the rear end cap (B). The stator (B) is disposed outside the rotor (B) and located between the front end cap (B) and the rear end cap (B). Compared with the prior art, the present invention has the advantages of significantly reducing the volume of machines and equipment.

Description

Technical Field

[0001] The present invention relates to a motor, in particular to a dual-motion motor. Background Art

[0002] For the growing automation and robotics industry applications, there is an urgent need for a motor that can compactly combine rotational and linear motion to help customers achieve the linkage of rotational and linear motion in a very small space.

[0003] There is currently no mature, ready-made solution on the market for this type of application. Users often use two separate motors to achieve rotational motion and linear motion separately.

[0004] After searching, Chinese patent publication number CN209627138U discloses a motor that can output multiple degrees of freedom of axial linear motion and circumferential rotation motion, which specifically includes a housing, a stator assembly, a rotor assembly and a screw rod. The stator assembly, the rotor assembly and the screw rod are installed in the housing. The stator assembly includes a stator armature, and the stator armature is fixedly mounted on the inner wall of the housing; the inner ring of the stator assembly is provided with a rotor assembly matching the stator armature, the inner ring of the rotor assembly matches the screw rod, the end of the screw rod is provided with an elastic member, the end of the rotor assembly is provided with a pin hole, and the elastic member matches the pin hole. The motor integrates axial linear motion and circumferential rotation motion, and when the axial linear motion reaches a specific position, it can be converted into circumferential rotation motion. However, this patent has the following problems:

[0005] 1) This patent cannot complete linear motion or rotational motion throughout the entire stroke. It only uses a limit mechanism to perform linear motion in a certain section of the stroke. When it moves to a specific position, it is triggered by the limit shaft and pin to turn into rotational motion.

[0006] 2) This patent and many other patents on the market do not truly decouple the rotational and linear degrees of freedom, and cannot simultaneously complete any combination of rotational and linear motion in a limited space, so their application scenarios are very limited.

[0007] 3) This patent and many other patents on the market only have one set of stator and rotor magnetic fields for magnetic field response, and cannot achieve flexible motion configuration with different speeds and accelerations for rotational freedom and linear freedom. Summary of the Invention

[0008] The purpose of the present invention is to provide a dual motion motor in order to overcome the above-mentioned defects in the prior art.

[0009] The purpose of the present invention can be achieved by the following technical solutions:

[0010] A dual-motion motor includes a rotary motion drive portion, a linear motion drive portion, and a connecting end cap. The rotary motion drive portion includes a front end cap, a stator, a rotor, a rotating shaft, and a rear end cap. The rotating shaft passes through the front end cap, the rotor, and the rear end cap in sequence. The stator is disposed outside the rotor and between the front end cap and the rear end cap.

[0011] The linear motion drive part includes stator B, rotor B, front end cover B, rotating shaft B and rear end cover B. The rotating shaft A is provided with a through hole for rotating shaft B to shuttle back and forth along the axial direction. The rotating shaft B is inserted into the through hole of rotating shaft B, the connecting end cover, the front end cover B, the rotor B and the rear end cover B in sequence. The stator B is arranged on the outside of the rotor B and is located between the front end cover B and the rear end cover B.

[0012] Preferably, the rotating shaft B is a threaded shaft with external threads on its surface.

[0013] Preferably, the rotor B is provided with an internal thread that matches the external thread of the rotating shaft B.

[0014] Preferably, the stator A and the rotor A generate electromagnetic action under the action of a driver, so that the rotor A rotates, and further drives the shaft A to rotate, thereby achieving corresponding rotational freedom;

[0015] The stator B and rotor B generate electromagnetic action under the action of the driver, thereby causing the rotor B to rotate. When the rotor B rotates, the rotating shaft B with an external thread can move back and forth along the axial direction of the motor, thereby driving the load to achieve linear freedom. When moving, the rotating shaft B can pass through the inside of the rotor of the two moving parts, the rotary motion drive part and the linear motion drive part.

[0016] Preferably, when the motor moves, it can generate the following combination of motion modes:

[0017] Movement status Rotational motion linear motion 1 stop forward 2 stop backward 3 Clockwise rotation stop 4 Clockwise rotation forward 5 Clockwise rotation backward 6 Counterclockwise rotation stop 7 Counterclockwise rotation forward 8 Counterclockwise rotation backward .

[0018] Preferably, the rear end cover A, the connecting end cover, and the front end cover B are an integral structure, or the rear end cover A and the connecting end cover are an integral structure, or the connecting end cover and the front end cover B are an integral structure.

[0019] Preferably, the gap between the rotating shaft A and the rotating shaft B is greater than 0.02 mm.

[0020] Preferably, the concentricity between the rotating shaft A and the rotating shaft B is less than 0.5 mm.

[0021] Preferably, the connecting end cover is provided with a circular boss which cooperates with a groove on the rear end cover A or the front end cover B.

[0022] Preferably, the connecting end cover has a circular groove which cooperates with the boss on the rear end cover A or the front end cover B.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1) Traditional structures typically use two motors to achieve dual-degree-of-freedom (DOF) operations on a workpiece, both rotational and linear. Typically, one stepper motor directly drives the rotational motion, while another stepper motor converts the rotational motion into linear motion via a belt and pulley mechanism. Geometrically, these two motors typically form two axes distributed across different locations on the equipment or device. This results in a large device and space. The present invention, however, integrates both degrees of freedom onto a single axis, significantly reducing the size of the machine and equipment. Evaluations have shown that the dual-motion motor structure described in the present invention can save over 50% of volume at the output shaft end.

[0025] 2) Traditional designs use two separate axes to arrange rotational and linear motion. Consequently, when performing a single rotational and linear motion on a workpiece, only rotational and linear motion can be performed separately. The technical solution described in this invention, however, combines rotational and linear motion when moving a workpiece, allowing linear motions such as gripping or pushing to be performed simultaneously with the workpiece's rotation. This significantly improves the equipment's operating efficiency, and when applied to high-frequency motion equipment, efficiency gains of over 20% can be achieved.

[0026] 3) The present invention combines two separate motors into one, which can reduce repeated connecting parts in the axial direction, thereby saving the production cost of the product. The material and production costs of the product can be saved by more than 15%. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a cross-sectional view of embodiment 1 of the present invention;

[0028] Figure 2 This is a schematic diagram of the appearance of Example 1 of the present invention. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0030] Example 1

[0031] The present invention is a motor that can simultaneously achieve linear and rotational two-degree-of-freedom motion, including a linear motion drive part, a rotational motion drive part and a connecting end cover 5. The rotational motion drive part includes a front cover armor 1, a stator armor 2, a rotor armor 3, a rotating shaft armor 4 and a rear end cover armor 8. The rotating shaft armor 4 sequentially penetrates the front cover armor 1, the rotor armor 3 and the rear end cover armor 8. The stator armor 2 is arranged outside the rotor armor 3 and is located between the front cover armor 1 and the rear end cover armor 8.

[0032] The linear motion drive part includes a stator B 6, a rotor B 7, a front end cover B 9, a rotating shaft B 10 and a rear end cover B 11. The rotating shaft A 4 is provided with a through hole for the rotating shaft B 10 to shuttle back and forth along the axial direction. The rotating shaft B 10 is inserted into the through hole of the rotating shaft B 10, the connecting end cover 5, the front end cover B 9, the rotor B 7 and the rear end cover B 11 in sequence. The stator B 6 is arranged on the outside of the rotor B 7 and is located between the front end cover B 9 and the rear end cover B 11.

[0033] The rotating shaft 10 is a threaded shaft with an external thread on its surface. The rotor 7 is internally provided with an internal thread that matches the external thread of the rotating shaft 10 .

[0034] The operating principle of the present invention is that stator A2 and rotor A3 generate electromagnetic interaction under the action of a driver, causing rotor A3 to rotate. This rotational movement of rotor A3 simultaneously drives shaft A4 to rotate, thereby achieving the corresponding degree of rotational freedom. Stator B6 and rotor B7 also generate electromagnetic interaction under the action of a driver, causing rotor B7 to rotate. Because rotor B7 and shaft B10 are mated via internal and external threads, when rotor B7 rotates, shaft B10, with its external threads, can move back and forth along the motor's axial direction, driving the load to achieve linear freedom.

[0035] The gap between the rotating shaft A 4 and the rotating shaft B 10 is greater than 0.02 mm, and the concentricity between the rotating shaft A 4 and the rotating shaft B 10 is less than 0.5 mm.

[0036] The connecting end cover 5 is provided with a circular boss which cooperates with the groove on the rear end cover A 8 or the front end cover B 9 .

[0037] The connecting end cover 5 is provided with a circular groove, which cooperates with the boss on the rear end cover A 8 or the front end cover B 9.

[0038] When the motor moves, it can produce the following movement combinations:

[0039]

[0040]

[0041] Example 2

[0042] For the structure of Example 1, there is also a better implementation method, that is, the rear end cover A 8, the connecting end cover 5, and the front end cover B 9 are designed as an integral structure. This integral structure combines the original three parts into one part, which can reduce costs and size.

[0043] Example 3

[0044] For the structure of Example 1, there is also a better implementation method, that is, the rear end cover A 8 and the connecting end cover 5 are designed as an integral structure. This integral structure combines the original two parts into one part, which can reduce costs and size.

[0045] Example 4

[0046] For the structure of Example 1, there is also a better implementation method, which is to design the connecting end cover 5 and the front end cover B 9 as an integral structure. This integral structure combines the original two parts into one part, which can reduce costs and size.

[0047] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A dual motion motor, characterized in that, The invention comprises a rotary motion driving part, a linear motion driving part and a connecting end cover (5), wherein the rotary motion driving part comprises a front end cover armor (1), a stator armor (2), a rotor armor (3), a rotating shaft armor (4) and a rear end cover armor (8), wherein the rotating shaft armor (4) sequentially penetrates the front end cover armor (1), the rotor armor (3) and the rear end cover armor (8), and the stator armor (2) is arranged outside the rotor armor (3) and is located between the front end cover armor (1) and the rear end cover armor (8); The linear motion driving part includes stator B (6), rotor B (7), front end cover B (9), rotating shaft B (10) and rear end cover B (11); the rotating shaft A (4) is provided with a through hole for the rotating shaft B (10) to shuttle back and forth along the axial direction; the rotating shaft B (10) is sequentially inserted into the through hole of the rotating shaft B (10), the connecting end cover (5), the front end cover B (9), the rotor B (7) and the rear end cover B (11); the stator B (6) is provided on the outside of the rotor B (7) and is located between the front end cover B (9) and the rear end cover B (11); The rotating shaft B (10) is a threaded shaft with an external thread on its surface; the stator A (2) and the rotor A (3) generate electromagnetic action under the action of the driver, thereby causing the rotor A (3) to rotate, further driving the rotating shaft A (4) to rotate, thereby achieving the corresponding degree of rotational freedom; The stator B (6) and the rotor B (7) generate electromagnetic action under the action of the driver, thereby causing the rotor B (7) to rotate. When the rotor B (7) rotates, the rotating shaft B (10) with an external thread can move forward and backward along the axial direction of the motor, thereby driving the load to achieve linear freedom. When moving, the rotating shaft B (10) can pass through the inside of the rotor of the two moving parts of the rotary motion drive part and the linear motion drive part.

2. A dual motion motor according to claim 1, characterized in that: The rotor B (7) is internally provided with an internal thread that matches the external thread of the rotating shaft B (10).

3. A dual motion motor according to claim 1, characterized in that: When the motor moves, it can produce the following movement combinations: 。 4. A dual motion motor according to claim 1, characterized in that: The rear end cover A (8), the connecting end cover (5), and the front end cover B (9) are an integral structure, or the rear end cover A (8) and the connecting end cover (5) are an integral structure, or the connecting end cover (5) and the front end cover B (9) are an integral structure.

5. A dual motion motor according to claim 1, characterized in that: The gap between the rotating shaft A (4) and the rotating shaft B (10) is greater than 0.02 mm.

6. A dual motion motor according to claim 1, characterized in that: The concentricity between the rotating shaft A (4) and the rotating shaft B (10) is less than 0.5 mm.

7. A dual motion motor according to claim 1, characterized in that: The connecting end cover (5) is provided with a circular boss which cooperates with the groove on the rear end cover A (8) or the front end cover B (9).

8. A dual motion motor according to claim 1, characterized in that: The connecting end cover (5) is provided with a circular groove, which cooperates with the boss on the rear end cover A (8) or the front end cover B (9).

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