TWI549405B - Rotary and linear motion mechanism - Google Patents

Description

Rotating and linear motion mechanism

The present invention relates to motor technology, and more particularly to a rotating and linear motion mechanism.

In order to meet the industry's demand for both rotary and linear motion, the conventional technology discloses that the rotary motor and the linear motor are coaxially connected to each other, and the rotation and the linear motion are output in the same output axial direction, and the specific technical content thereof is As with the linear rotating device shown in the first figure, the spindle (2) of the rotary motor (1) is coaxially coupled with the rod-shaped mover (5) of the linear motor (4) by the coupling (3). The rotation and linear motion respectively provided by the rotary motor (1) and the linear motor (4) are transmitted outward through the coaxially disposed transmission portion (6) to meet the needs of the industry.

Wherein, in order to allow the mandrel (2) to be axially displaced relative to the rotary motor (1) with the action of the mover (5), and maintain it between the rotor of the rotary motor (1) Engaging in the radial direction, a keyway (7) of an appropriate length is axially extended on the mandrel (2), and is coaxially threaded on the mandrel by a transmission ring (9) having a key strip (8) ( 2) upper, and the key strip (8) is slidably disposed in the keyway (7), thereby allowing the mandrel (2) to be axially reciprocatingly displaced while still being engaged with each other by a keyway (7) The key bar (8) is maintained in radial engagement with the rotor of the rotary motor (1) so that the rotary motor (1) causes the spindle (2) to rotate.

It is a transmission and sliding structure that allows the mandrel (2) to have both rotational and axial movements, and achieves its purpose and effect, but by sliding between the keyway (7) and the key bar (8) Guarantee The technical content of the radial inter-engagement, in addition to the lack of excessive stress concentration of the mandrel (2) when subjected to rotational force, is not yet ideal in manufacturing and processing, and lacks proper lubrication mechanism. It is also easy for the mandrel (2) to cause improper wear during the continuous sliding displacement of the axial reciprocating force, so as to affect the precision of the actuation, and the industrial field to which it is applied is adversely affected.

Accordingly, the main object of the present invention is to provide a rotary and linear motion mechanism for sliding a first shaft hole of a driving portion of a rotary motor and a rod-like shaft portion coaxially through a sleeve, and to make a radial direction The upper shape is a complementary non-circular geometry, so that the shaft portion can be axially reciprocally displaced relative to the first shaft hole, and can be restrained by complementary geometric shapes. The shaft portion and the first shaft hole are engaged with each other in the radial direction.

Therefore, in order to achieve the above object, the rotary and linear motion mechanism provided by the present invention includes a body portion in a specific technical content; a rotary driving portion is disposed in the body; a shaft hole driving portion is disposed in the body portion and has a second shaft hole coaxially corresponding to the first shaft hole; a shaft portion coaxially extending and slidingly coupled to the first shaft hole and the second shaft The at least one axial end of the hole extends out of the body; and the feature is that the first axial hole has a geometric shape other than a circle; the shaft portion is slidably coupled to the first axial hole. The radial cross-sectional shape of the shaft portion is in a geometric shape complementary to the first shaft hole; and further includes at least one annular sliding portion that is coaxially threaded with the first shaft hole And the shaft portion is complementary to the shaft portion of the first shaft hole geometry, and is fixedly positioned in the body portion.

The geometric shape in which the first axial hole and the shaft portion are complementary to each other may be a shape in which a polygonal shape or an elliptical shape is engaged with each other, and further, the equal polygonal structure may be a square shape.

In addition, in order to reduce the contact friction when the shaft portion is reciprocating axially displaced relative to the first shaft hole, the shaft portion may be complementary to the circumferential side end surface of the shaft portion of the first shaft hole geometry and the first The hole walls of the shaft holes are spaced apart to reduce the wear that may occur when they slide relative to each other.

Furthermore, by the spatial pattern in which the circumference of the rod and the wall of the hole are spaced apart from each other, an air gap space can be formed between the circumference of the shaft portion and the wall of the first shaft hole, and the external pressure can be introduced by external pressure. Fluid enters the air gap space to assist in maintaining a coaxially corresponding state of the shaft portion and the first shaft bore.

Wherein, in order to facilitate the introduction of the external high-pressure fluid into the air gap space, the air gap space and the outside of the body portion can be communicated by appropriately connecting the air passages, and further, the connecting air passage system can be set. In the rotation driving portion, an opening is formed in the wall of the first shaft hole, and may be provided in the shaft portion, and an opening is formed on the rod side of the shaft portion.

In addition, in order to improve the cooling efficiency to promote the efficiency of the motor, the rotating and linear motion mechanism may further include a cooling module disposed in the body and adjacent to the linear driving portion.

Furthermore, in order to improve the accuracy of the axis shift position control, the rotary and linear motion mechanism may further include a position detecting module between the linear driving portion and the shaft portion.

The position detecting module can be an optical ruler or a magnetic rule detecting technology, and has a measuring reference fixed on the shaft portion, and a measuring portion is fixed on the body. To sense the position of the measurement reference.

(1)‧‧‧Rotary motor

(2) ‧‧‧ mandrel

(3)‧‧‧Couplings

(4)‧‧‧Linear motor

(5)‧‧‧ rod-shaped movers

(6) ‧‧‧Transmission Department

(7)‧‧‧ keyway

(8)‧‧‧Keybar

(9)‧‧‧Drive ring

(10)‧‧‧Rotating and linear motion mechanisms

(20) ‧‧‧ Body

(30) ‧‧‧Rotary Drives

(31)‧‧‧Rotating iron core

(32)‧‧‧First shaft hole

(40) ‧‧‧Linear Drives

(41)‧‧‧Second shaft hole

(50)‧‧‧Axis

(51)‧‧‧Linear transmission section

(52) ‧‧‧Rotary transmission section

(53) ‧‧‧Extension

(60) ‧‧‧Sliding

(70) ‧‧‧Cooling module

(80)‧‧‧ Position Detection Module

(81)‧‧‧Measurement benchmark

(82)‧‧‧Measurement Department

(S) ‧ ‧ air gap space

The first figure is a cross-sectional view of a prior art.

The second drawing is an exploded view of a preferred embodiment of the present invention.

The third drawing is a combination of a preferred embodiment of the present invention.

Figure 4 is a cross-sectional view of a preferred embodiment of the present invention taken along the line 3-4 of Figure 3-4.

Figure 5 is a cross-sectional view of a preferred embodiment of the present invention taken along the line sec of Figure 5-5.

Figure 6 is a cross-sectional view of a preferred embodiment of the present invention taken along the line sec of Figure 6-6.

Referring to the second to sixth figures, the rotary and linear motion mechanism (10) provided in a preferred embodiment of the present invention is used to make the same output shaft have a rotational and linear reciprocating displacement motion. The function is to enable the industry to meet the needs of the industry, but the motor technology used to generate the rotary drive and the linear drive is a general well-known technology and is not the main technical feature of the present invention. The description of the embodiments will not be a rumor.

Specifically, the rotating and linear motion mechanism (10) mainly includes a body portion (20), a rotation driving portion (30), a linear driving portion (40), a shaft portion (50), and a sliding portion ( 60), a cooling module (70) and a position detecting module (80), wherein: the body portion (20) is substantially cylindrical and is used as a base for other constituent elements, so that each The constituent elements are attached.

The rotary driving unit (30) is a conventional rotary motor moving technology for converting electrical energy into a mechanical energy output of a rotary motion, and is substantially cylindrical and coaxially located on the body of the body (20). 20) a tubular rotating iron core (31) having an appropriate length in one end, and a first square hole (32) having a square shape extending axially from one end of the rotating shaft (31) to the inner side of the shaft shaft at an appropriate depth Its inner wall of the tube.

The linear drive unit (40) is a conventional linear motor technology for converting electrical energy into a mechanical energy output of a linear reciprocating motion, which is substantially cylindrical and coaxially located on the body of the body (20). The other end of the portion (20) is spaced apart from the rotary drive portion (30) and has a second shaft hole (41) coaxially corresponding to the first shaft hole (32).

The shaft portion (50) is coaxially slidably disposed in the first shaft hole (32) and the second shaft hole (41) in a straight column shape, and has a columnar linear transmission section (51). The conventional linear motor has a rod-shaped mover technology of a plurality of magnetic regions, and is slidably coupled to the second shaft hole (41) to interact with a magnetic field of the linear drive portion (40), thereby The linear transmission section (51) is an axial reciprocating linear displacement, which drives the overall synchronous displacement of the shaft portion (50), and a rod-shaped rotating transmission section (52) is one end and the linear transmission section (51). One end is coaxially fixed and coaxially penetrates into the first shaft hole (32), the shape of the radial section is squared to complement the square of the first shaft hole (32), and the side rod is made The face is spaced apart from the opposing hole wall of the first axial hole (32), and a tubular air gap space (S) is formed therebetween, and a rod-shaped extension (53) is coaxially extended to the rotating iron core ( 31) The tube hole is coaxially connected at one end to the other end of the rotating transmission section (52) and protrudes beyond the body (20) at the other end.

The sliding portion (60) is an annular self-lubricating bearing coaxially disposed on the first shaft hole (32) and positioned in the body portion (20), and is interposed between the linear driving portion (30) Between the rotating driving portion (40), and the sleeve is slidably coupled to the rotating transmission section (52), and the four corner portions of the rotating transmission section (52) and the inner annular surface of the sliding portion (60) The opposite parts are slid.

The cooling module (70) is a conventional cooling technology for applying heat dissipation to a fluid, and has a cooling plate (71) attached to one side of the linear driving portion (40), and the linear driving portion is obtained. (40) The heat generated during work is dissipated to maintain its optimum working efficiency.

The position detecting module (80) is for detecting the position of the linear displacement, and There is a measuring reference (81) with an optical scale, which is disposed parallel to the hole axis direction of the second shaft hole (41), and the body portion (20) corresponds to the side of the linear driving portion (40). The portion is fixed to the linear transmission section (51) of the shaft portion (50) at one end, and the measuring portion (82) with the optical scale reading head is fixed to the body portion (20). The sensing reference (81) is sensed to accurately detect the displacement position of the linear transmission section (51).

The rotation and linear motion mechanism (10) is configured to provide an axially reciprocating linear displacement force to the shaft portion (50) by the linear drive portion (40), and the rotary drive portion (30) The shaft portion (50) is provided with a biasing force for the radial rotational displacement, in order to obtain the same driving ability as the prior art, for the industrial needs, and more, the rotating and linear motion mechanism (10) When the rotational displacement is performed, the shaft portion (50) is rotated by the uniform engagement between the first shaft hole (32) and the rotation transmission section (52) which are squarely complementary in shape. The force is more average than the prior art, so as to avoid the loss caused by excessive stress concentration, and the structure of the basic geometry is also convenient in processing.

Furthermore, when the shaft portion (50) is axially displaced by the linear driving portion (40), it can exist between the rotating transmission section (52) and the first shaft hole (32). The air gap space (S) reduces the wear caused by the sliding between them, and provides appropriate support by the sliding portion (60), and allows the friction between the shaft portion (50) and each other to be reduced. The lowest possible, avoiding the wear of the shaft portion (50) to affect the accuracy of the work; at the same time, the shaft portion (50) can be axially moved by injecting a fluid of appropriate pressure into the air gap space (S). The stability is that the technical content of introducing the external high-pressure fluid into the air gap space (S) may be to connect the air passage (not shown) at an appropriate position to achieve the connection between the air gap space (S) and the body. Part (20) external pressure source, specifically, the connection gas a passage is disposed in the shaft portion (50), and an opening is formed on a rod circumferential side of the rotation transmission section (52) to communicate with the air gap space (S), or the connection air passage can be disposed on the rotation drive And forming an opening in the wall of the first shaft hole (32), and communicating with the air gap space (S) to introduce an external high-pressure fluid into the air gap space (S) Maintain the stability of the shaft portion (50) when it is axially displaced.

(30) ‧‧‧Rotary Drives

(31)‧‧‧Rotating iron core

(32)‧‧‧First shaft hole

(40) ‧‧‧Linear Drives

(41)‧‧‧Second shaft hole

(51)‧‧‧Linear transmission section

(52) ‧‧‧Rotary transmission section

(53) ‧‧‧Extension

(60) ‧‧‧Sliding

Claims (10)

A rotating and linear motion mechanism includes: a body portion; a rotary driving portion disposed in the body; having a first shaft hole; a linear driving portion disposed in the body and having the first shaft a second shaft hole corresponding to the coaxial hole; a shaft portion coaxially extending and sliding in the first shaft hole and the second shaft hole, at least one axial end extending out of the body; wherein: the first shaft The hole has a geometry other than a circle; the radial section of the shaft portion that is slidably coupled to the corresponding shaft portion of the first shaft hole is a geometric shape complementary to the first shaft hole; and, more The method includes: at least one annular sliding portion, which is coaxially coupled to the first shaft hole, and is sleeved on the shaft portion of the shaft portion complementary to the first shaft hole geometry, and is fixedly disposed on the shaft portion In the body. The rotary and linear motion mechanism according to claim 1, wherein the first axial hole and the geometrical shaft portion of the shaft portion are squares complementary to each other. The rotary and linear motion mechanism according to claim 1 or 2, wherein a peripheral side end surface of the shaft portion of the shaft portion is spaced apart from a hole wall of the first shaft hole to form a gas therebetween Gap space. The rotary and linear motion mechanism according to claim 3, further comprising a connecting air passage connecting the air gap space and the outer portion of the body. The rotary and linear motion mechanism of claim 4, wherein the connecting air passage forms an opening in the wall of the first shaft hole. The rotary and linear motion mechanism of claim 4, wherein the connecting air passage forms an opening on a rod side of the shaft portion. The rotary and linear motion mechanism according to the first aspect of the invention, wherein the sliding portion is a self lubricating bearing. The rotary and linear motion mechanism according to claim 1, further comprising a cooling module disposed in the body and adjacent to the linear driving portion. The rotary and linear motion mechanism according to claim 1, further comprising a position detecting module disposed between the linear driving portion and the shaft portion. According to the rotary linear motion mechanism of claim 9, wherein the position detecting module has a measuring reference, which is fixed on the shaft portion, and a measuring portion is fixed on the body On the part, it is used to sense the position of the measurement reference.