JP3243249U - Motorized electric lead screw structure - Google Patents

Abstract

A motor-driven electric lead screw structure is provided in which the installation stability of the lead screw structure and the drive motor is not reduced, and the concentricity is not reduced. A motorized electric lead screw structure includes a casing, a first mounting plate, a second mounting plate, a drive motor, and a lead screw structure. An elongated sliding member is provided on one side of the casing, one surface of the first mounting plate is slidably connected to the elongated sliding member, and the other surface is provided with a plurality of sets of mounting holes. , the second mounting plate is fixed to one end of the first mounting plate and protrudes toward the casing; the driving motor is installed in the casing; the first end of the lead screw structure is fixed to the second mounting plate; Finally, the second end is slidably coupled within the output shaft of the drive motor. The first mounting plate is used for mounting the external functional module, and the cylindrical surface of the lead screw structure is not compressed under external force. [Selection drawing] Fig. 2

Description

TECHNICAL FIELD The present invention relates to the technical field of motorized lead screw structure, and more particularly to motor driven motorized lead screw structure.

With the development of society, the research and application of motors have been further improved, and lead screw motors have the characteristic of converting the rotary motion of the motor into linear motion, and have good development and application in the manufacturing of machine tools. can be done. A conventional lead screw structure motor mainly includes a motor body, a lead screw structure, and a screw nut fitted on the lead screw structure, and the rotation shaft of the lead screw structure and the motor body are connected via a coupling. Then, the rotation of the motor body causes the lead screw structure to rotate, and the screw nut performs linear reciprocating motion in the outer sliding groove, thereby realizing the return from rotary motion to linear motion. However, in the above structure, the screw nut is used to attach the external function module, so the weight of the screw nut relative to the lead screw structure increases. It affects the stability of the connection with the main body, and the inability to ensure the concentricity of the lead screw structure and the motor structure affects the operational stability of the motor. Therefore, in order to solve the above problems, a more rational lead screw structure has been demanded.

The present invention addresses the technical problem that the electric lead screw structure in the prior art has an unstable connection between the lead screw structure and the motor body due to the problem of weight increase during the process of assembling the external function module, and the concentricity is reduced. Focus on and provide new solutions.

In order to achieve the above object, the present invention is
a casing provided with an elongated sliding member on one side;
a first mounting plate having one surface slidably connected to an elongated sliding member and having a plurality of sets of mounting holes provided on the other surface;
a second mounting plate fixed to one end of the first mounting plate and protruding toward the casing;
a drive motor built into the casing;
The first end is rigidly coupled to the second mounting plate and the second end is slidably coupled within the output shaft of the drive motor to follow the rotation of the drive motor and extend and contract along the axial direction to provide a second A lead screw structure for reciprocating one mounting plate and a second mounting plate.

In a further improved form of the present invention, the drive motor comprises a hollow rotor and a screw nut, one end of the rotor is connected with the main control board, the other end is provided with a nut socket, and the screw nut is assembled into the nut socket and fitted onto the rod of the lead screw structure, the cavity accommodating the lead screw structure.

In a further improved form of the present invention, a magnetic cylinder structure is further installed outside the rotor, a stator structure is further installed at a position corresponding to the magnetic cylinder structure in the casing, and the stator structure is electrically connected to the main control board. connected to

In a further improved form of the present invention, said drive motor further comprises a plurality of sets of bearing structures, the outer side of which is fixed to the profile of the casing and the inner side fits over the nut socket.

In a further improved form of the present invention, a plurality of sets of grooves are further provided in the circumferential direction of the nut socket, and the groove bottoms of the grooves are closely attached to the inner side of the bearing structure.

In a further improved form of the present invention, a threaded structure is further provided on the inner wall of the opening of the casing for retracting the protrusion of the lead screw structure, and a screwed cap that conforms to the threaded structure is also provided. is provided with a protruding hole for protruding the lead screw structure.

In a further refinement of the invention, the diameter of the end face of the opening is the same as the outer diameter of the bearing structure and the side of the screw-on cap closer to the rotor abuts the outer bearing structure.

As a further improvement of the present invention, a sliding groove is provided on the surface of the first mounting plate near the casing, and the elongated sliding member is disposed in the sliding groove to slide.

In a further improved form of the invention, a telescoping head is fitted to the lead screw structure, the first end being rigidly secured to the second mounting plate and the second end being rigidly secured to the surface of the screw-on cap facing away from the rotor. It also has a dust cap.

In a further improved form of the invention, the entire telescoping dust cap presents a truncated cone shape and is composed of multiple expansion joints, multiple expansion joints being connected back and forth, any expansion joint being a lead screw structure. It follows the retraction and retracts into the adjacent expansion joint.

Compared with the prior art, the motorized electric lead screw structure provided by the present invention comprises a casing, a first mounting plate, a second mounting plate, a driving motor and a lead screw structure, wherein the casing: An elongated sliding member is provided on one side, one surface of the first mounting plate is slidably connected to the elongated sliding member, and the other surface is provided with a plurality of sets of mounting holes. 2 mounting plate is fixed to one end of the first mounting plate and protrudes toward the casing; the driving motor is installed in the casing; the first end of the lead screw structure is fixed to the second mounting plate; , the second end of which is slidably coupled within the output shaft of the drive motor. The rotation of the driving motor causes the lead screw structure to reciprocate and contract, during the expansion and contraction process, the first mounting plate and the second mounting plate are also reciprocated with respect to the casing, and the first mounting plate is moved to assemble the external function module. Since the cylindrical surface of the lead screw structure is not compressed by the external force, the installation stability of the lead screw structure and the driving motor is not deteriorated, and the concentricity is not reduced.

1 is a three-dimensional view of the present invention; FIG. 1 is an exploded view of the present invention; FIG. 1 is a cross-sectional view of the present invention; FIG. 1 is an exploded view of a driving motor structure of the present invention; FIG.

In order to explain the present invention more clearly, the present invention will now be further described with reference to the accompanying drawings.

In the following, the present invention will be described in detail with examples for better understanding. It should be understood that the described embodiments are some, but not all embodiments of the present invention. It will be understood that the specific examples are used only to interpret the invention and are not intended to limit the invention.

As used herein, the terms “include” and/or “comprise” designate the presence of the stated feature, whole, step, operation, element, and/or assembly, but not one or more other It will be understood that it does not exclude the presence or addition of features, wholes, steps, operations, elements, assemblies, and/or combinations thereof.

Referring to FIGS. 1 to 4, the present invention is a motor-driven electric lead screw comprising a casing 1, a first mounting plate 2, a second mounting plate 3, a driving motor 4 and a lead screw structure 5. Providing a structure, an elongated sliding member 14 is provided on one side of the casing 1, one side of the first mounting plate 2 is slidably connected to the elongated sliding member 14, and the other side The second mounting plate 3 is fixed to one end of the first mounting plate 2 and protrudes toward the casing 1. Of course, the second mounting plate 3 can be mounted on any surface. Mounting holes can also be provided, so that arbitrary functional components can be assembled on the first mounting plate 2 and/or the second mounting plate 3 according to actual needs. The drive motor 4 is housed in the casing 1 , the first end of the lead screw structure 5 is fixed with the second mounting plate 3 and the second end is slidably connected within the output shaft of the drive motor 4 . . The rotation of the driving motor 4 causes the lead screw structure 5 to reciprocate and contract, and in the process of expansion and contraction, the first mounting plate 2 and the second mounting plate 3 are also reciprocated with respect to the casing 1, and the first mounting plate 2 functions as an external function. When the first mounting plate 2 and the second mounting plate 3 are fitted and fixed to each other, the cylindrical surface of the lead screw structure 5, which is used for assembling the module, is not pressed by an external force, Since the surface that receives the main force is the sliding contact portion between the long sliding member 14 and the first mounting plate 2, the installation stability of the lead screw structure 5 and the drive motor 4 is lowered, and the concentricity is reduced. There is no declining situation, and the operation of the whole motorized lead screw structure is more stable.

In a specific embodiment, the drive motor 4 includes a hollow rotor 41 and a screw nut 42, one end of the rotor 41 is connected to the main control board, the other end is provided with a nut socket 43, and the screw nut 42 is assembled in the nut socket 43 and fits onto the rod of the lead screw structure 5, the cavity accommodating the lead screw structure 5. The main control board is equipped with coding components such as an encoding disk, a coding chip and a PCB board board, and is used to control the rotation speed and rotation direction of the rotor 41 and convert it into a required round trip distance. The screw nut 42 chooses a ball screw nut, the outside is fixed in the nut socket 43, and under the drive of magnetic force, the outside of the screw nut 42 and the nut socket 43 remain stationary and follow the rotor 41. to rotate the lead screw structure 5 to reciprocate and contract, and in the course of the expansion and contraction of the lead screw structure 5, the fixed second mounting plate 3 is reciprocated, and at this time, the second mounting plate 3 and the The solidified first mounting plate 2 reciprocates on one surface of the casing 1 . Since the rotor 41 and the lead screw structure 5 can be connected without using a coupling, the product cost is reduced and there is no fear of insufficient concentricity due to insufficient precision of the coupling.

More specifically, a magnetic cylinder structure 44 is further installed outside the rotor 41, and a stator structure (not shown) is further installed at a position corresponding to the magnetic cylinder structure 44 inside the casing 1. The stator structure is mainly It is electrically connected to the control board. The main control board is coded by the operator, power commands are entered, the stator structure provides the magnetic force, the magnetic cylinder structure 44 rotates the rotor 41, and the rotation of the rotor 41 causes the first end of the lead screw structure 5 to rotate. can reciprocate in the cavity, the second end exerts a pushing/pulling force on the second mounting plate 3, and the first mounting plate 2 reciprocates following the second mounting plate 3.

In order to further enhance the structural rationality of the rotation of the rotor 41, in this embodiment, the drive motor 4 further comprises a plurality of sets of bearing structures 45, the outer side of the bearing structures 45 being fixed to the profile of the casing 1, and the inner side fits over the nut socket 43 . On the one hand, the bearing structure 45 is fitted into the cylindrical surface of the nut socket 43 to provide a total support for the rotor 41, so that the rotor 41 can be stably assembled in the casing 1 without deviation, and the rotor 41 and the lead The concentricity with the screw structure 5 can be ensured to further ensure the smoothness of the rotor 41. More preferably, the bearing structure 45 adopts ball bearings to further increase the smoothness of the reciprocating motion.

In order to make the overall structure more compact, in this embodiment, a plurality of sets of grooves 431 are further provided in the circumferential direction of the nut socket 43 , and the groove bottoms of the grooves 431 are closely attached to the inner side of the bearing structure 45 . . By providing the concave groove 431 , not only is the stability of assembly further improved, but also the concentricity can be maintained better, and the convex ring formed by the concave groove 431 can be closely attached to the bearing connection structure 45 . It can be understood that it is possible and convenient to install.

In this embodiment, in order to prevent the performance from being adversely affected by dust entering the interior of the casing 1 during the course of rotation, a threaded structure 12 is provided on the inner wall of the opening 11 of the casing 1 for retracting the protrusion of the lead screw structure 5 . is further provided, and a threaded cap 13 matching the threaded structure 12 is also provided, and a protruding hole 131 is provided in the center of the threaded cap 13 for protruding the lead screw structure 5 . A threaded cap 13 seals the casing 1 and further ensures the stability of the lead screw structure 5 and the drive motor 4 .

In a more preferred embodiment, the diameter of the end face of the opening 11 is the same as the outer diameter of the bearing structure 45 and the side of the screw-on cap 13 closer to the rotor 41 abuts the external bearing structure 45 . The screw-on cap 13 and the opening 11 are correspondingly enlarged to press against one side of the bearing structure 45 through the screw-on cap 13, and the convex ring formed by the concave groove 431 provides a support point for tightening the structure. to be more compact.

In this embodiment, a sliding groove 21 is provided on the surface of the first mounting plate 2 near the casing 1, and the elongated sliding member 14 is arranged in the sliding groove 21 to slide. It can be understood that the provision of the sliding groove 21 further ensures the sliding flow of the first mounting plate 2 .

In order to meet various usage environments, it is necessary to protect the outer part of the lead screw structure 5 from dust, otherwise the dust will easily accumulate, so that the dust will enter the inside of the casing 1 together with the lead screw structure. retracted and thus, in this example, fitted into the lead screw structure 5, with a first end rigidly attached to the second mounting plate 3 and a second end rigidly attached to the surface of the screw-on cap 13 remote from the rotor 41. It further comprises a retractable dust cap 6. The center of the retractable dust cap 6 can be freely extended and retracted to cover the lead screw structure 5 and prevent dust from entering.

In a specific embodiment, the entire telescoping dust cap 6 has the shape of a truncated cone and is composed of multiple expansion joints connected back and forth, any expansion joint being connected to the retraction of the lead screw structure 5. It follows and is accommodated in the adjacent expansion joint. The most distal expansion joint has the largest volume and can accommodate all expansion joints except itself without affecting the expansion and contraction performance of the lead screw structure 5, making the whole structure more compact. , find application in industries with high volume requirements (such as laser cutting and robotics).

Advantages of the invention include:
1) The rotation of the driving motor causes the lead screw structure to reciprocate and contract, and in the process of expansion and contraction, the first mounting plate and the second mounting plate are also reciprocated with respect to the casing, and the first mounting plate is used for assembling the external function module. The cylindrical surface of the lead screw structure is not pressed by external force, and when the first mounting plate and the second mounting plate are fitted and fixed to each other, the surface that receives the main force is Since it is the sliding contact part between the long sliding member and the first mounting plate, there is no situation where the stability of the lead screw structure and the drive motor is lowered and the concentricity is lowered. The operation of the whole structure is more stable,
2) The rotor and screw nut of the drive motor can form a good fitting structure form, realizing synchronous rotation between the rotor and nut, reducing the error, improving the accuracy, and controlling the force. Useful and suitable for the field of high-precision positioning,
3) The rotor and stator structure are rationally assembled via a casing, giving the product the characteristics of a compact structure.

Although some specific embodiments are disclosed in the present invention as described above, they are not limited to the present invention in any way, and all variations that can be conceived by those skilled in the art shall fall within the protection scope of the present invention. .

Reference Signs List 1 casing 11 opening 12 threaded structure 13 screwed cap 131 protruding hole 14 elongated sliding member 2 first mounting plate 21 sliding groove 3 second mounting plate 4 drive motor 41 rotor 42 screw nut 43 nut socket 431 concave groove 44 magnetic cylinder structure 45 bearing structure 5 lead screw structure 6 telescopic dust cap

Claims (10)

A motorized electric lead screw structure comprising:
a casing provided with an elongated sliding member on one side;
a first mounting plate having one surface slidably connected to the elongated sliding member and having a plurality of sets of mounting holes provided on the other surface;
a second mounting plate fixed to one end of the first mounting plate and protruding toward the casing;
a drive motor provided inside the casing;
The first end is rigidly attached to the second mounting plate and the second end is slidably coupled within the output shaft of the drive motor and axially expands and contracts as the drive motor rotates. , a lead screw structure for reciprocating the first mounting plate and the second mounting plate. The drive motor includes a rotor with a cavity and a screw nut, one end of the rotor is connected to the main control board, the other end is provided with a nut socket, and the screw nut is assembled in the nut socket. 2. The motorized electric lead screw structure of claim 1, wherein the lead screw structure is mounted on a rod of the lead screw structure, and the cavity accommodates the lead screw structure. A magnetic cylinder structure is further installed outside the rotor, and a stator structure is further installed in the casing at a position corresponding to the magnetic cylinder structure, and the stator structure is electrically connected to the main control board. The motorized electric lead screw structure according to claim 2, characterized by: 4. The drive motor according to claim 3, further comprising a plurality of sets of bearing structures, wherein the outer side of said bearing structure is fixed to the profile of said casing and the inner side fits said nut socket. Motor driven electric lead screw structure. The motor-driven electric motor of claim 4, wherein a plurality of sets of grooves are further provided in the circumferential direction of the nut socket, and groove bottoms of the grooves are closely attached to the inside of the bearing structure. Lead screw structure. An opening is formed in the casing at a position for retracting the protrusion of the lead screw structure, a threaded structure is further provided on the inner wall of the opening, and a screwed cap that fits the threaded structure is also provided, 6. The motor-driven electric lead screw structure as claimed in claim 5, wherein a protrusion hole is provided in the center of the cap for protruding the lead screw structure. 7. Motor according to claim 6, characterized in that the diameter of the opening end face is the same as the outer diameter of the bearing structure, and the side of the screw-on cap closer to the rotor abuts the outer bearing structure. Driven motorized lead screw structure. A sliding groove is provided on a surface of the first mounting plate near the casing, and the elongated sliding member slides in the sliding groove. 8. The motorized electric lead screw structure according to 7. further comprising a telescoping dust cap fitted to the lead screw structure and having a first end secured to the second mounting plate and a second end secured to a surface of the threaded cap facing away from the rotor. The motorized electric lead screw structure according to claim 8, characterized by: The entire telescopic dust cap presents a truncated cone shape and is composed of a plurality of expansion joints, wherein the plurality of expansion joints are connected back and forth, and any expansion joint is adjacent to follow the retraction of the lead screw structure. 10. The motorized electric lead screw structure of claim 9, wherein the motorized lead screw structure is housed within an expansion joint.