Direct connection type electric cylinder
By adopting the elastic connection between the servo motor and the coupling and the smooth corner design in the direct-connected electric cylinder, the vibration problems between the motor and the lead screw and the scratching problems of the drive end are solved, and the stability of the electric cylinder is improved. Service life.
Patent Information
- Application Number
- CN202420845989.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-13
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During the operation of the existing direct-connected electric cylinder, the connection between the motor and the lead screw is unstable due to mechanical vibration, which is prone to wear and mechanical failure. The sharp edges and corners of the drive end will cause scratches and scratches with other components and shortening. Service life.
The servo motor is connected to the coupling through elastic components. The planetary screw is composed of a screw, a screw sleeve and a roller. The coupling is an elastic coupling. The motor mounting plate and the flange plate are connected by screws. The drive end processing is Make smooth corners to reduce friction.
Effectively buffer mechanical vibration, maintain the connection stability of the motor and lead screw, reduce wear, facilitate maintenance and repair, and extend the service life of the electric cylinder.
Smart Images
Figure CN222169525U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric cylinders, in particular to a direct-connected electric cylinder. Background Art
[0002] Electric cylinders are products designed for continuous motion, low to high loads (usually high speed), and can be used for multiple cycles during their service life. These products have extremely high positioning accuracy and controllability, and can achieve precise motion control under loads ranging from several kilograms to 50 tons. Electric cylinders are more stable. Its operating speed and power range have been improved, and it can provide higher position accuracy. There is no need to install control valves and related hardware separately, and it can be easily integrated into the electronic control system of the equipment to achieve linkage. In addition, electric cylinders also have the advantages of fast response and excellent accuracy and repeatability, which can not only simplify the programming of complex movements, but also enable the equipment to quickly adapt to different process requirements.
[0003] A direct-coupled electric cylinder is a drive device that integrates a motor and a lead screw, which converts the motor's rotary motion into linear motion. Direct-coupled electric cylinders have the advantages of simple structure, high control accuracy, fast response speed, and easy maintenance, and are widely used in machinery manufacturing, automation equipment, medical equipment, and other fields. According to the type of motor, it can be divided into two types: DC motor drive and AC motor drive. DC motor drive has the advantages of large starting torque and wide speed regulation range, while AC motor drive has the advantages of simple structure and reliable operation.
[0004] In the process of realizing the present invention, the inventors found that the prior art had the following problems: 1. During the operation of the existing direct-coupled electric cylinder, the connection between the motor and the lead screw is often unstable due to the mechanical vibration generated, which makes it easy for the two to wear out or encounter mechanical failures; 2. The driving end corners of the existing direct-coupled electric cylinder are relatively sharp, and when it is telescopically driven, it often rubs and scratches against other components, thereby shortening the service life of the electric cylinder. Utility Model Content
[0005] The purpose of the present utility model is to provide a direct-coupled electric cylinder to solve the problem that the existing direct-coupled electric cylinders mentioned in the above background technology often have unstable connection between the motor and the lead screw due to mechanical vibration during operation, which makes it easy for the two to suffer from aggravated wear or mechanical failure, and the existing direct-coupled electric cylinders have sharp corners at the driving end, which often cause friction and scratches with other components when they are telescopically driven, thereby shortening the service life of the electric cylinder. To achieve the above purpose, the present utility model provides the following technical solutions: a direct-coupled electric cylinder, including a servo motor, the front outer wall of the servo motor is threadedly connected to a motor mounting plate, the front outer wall of the motor mounting plate is threadedly connected to the rear end of the electric cylinder body, the head end of the electric cylinder body is threadedly connected to a flange plate, the driving end of the servo motor is threadedly connected to one end of the inner wall of the coupling, the other end of the inner wall of the coupling is threadedly connected to a planetary screw, and the other end of the planetary screw is plugged with an extension rod.
[0006] Further preferably, the planetary screw is composed of a screw, a sleeve and a plurality of rollers, wherein the sleeve is rotatably connected to the plurality of rollers, and the outer wall of the screw body is threadedly connected to the inner wall of the sleeve and meshed with the outer wall of the rollers.
[0007] Further preferably, the servo motor forms a telescopic mechanism together with a planetary screw.
[0008] Further preferably, the coupling is an elastic coupling, which is composed of two half-couplings and an elastic element, wherein the outer walls of the opposite sides of the two half-couplings are threadedly connected by screws, and an elastic element is also provided on the inner wall of the connection between the two half-couplings.
[0009] Further preferably, screw holes are provided on the surfaces of the motor mounting plate and the flange plate, and the rear ends of the motor mounting plate and the flange plate are tightly fitted to the inner wall of the electric cylinder body.
[0010] Further preferably, the driving end of the extension rod has rounded corners.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] In the utility model, the servo motor is started and the rotational force generated by it is transmitted to the screw rod through the coupling, so that the screw rod is screwed into the front end of the screw sleeve along the direction of the thread. During this period, the elastic element in the coupling can buffer and absorb the mechanical vibration generated between the screw rod and the output end of the servo motor when relative displacement and angular deviation occur between the two, thereby maintaining the connection stability between the servo motor and the planetary screw rod, avoiding the problem of increased wear of the servo motor and the planetary screw rod or mechanical failure. At the same time, because the outer wall of the screw rod and the outer wall of the roller are meshed with each other, the roller will roll between the screw rod and the screw sleeve, thereby converting the rotational motion of the screw rod into linear motion, and then driving the screw rod to push the extension rod to extend from the inside of the electric cylinder body, thereby completing the driving of the electric cylinder.
[0013] In the utility model, the electric cylinder body is respectively connected with the flange plate and the servo motor by screws and the flange plate and the motor mounting plate arranged at both ends. This connection method is convenient for disassembly and replacement, so that the maintenance and repair of the servo motor and the electric cylinder can be completed quickly. By adopting the processing method of blunting the sharp edges, the driving end of the extension rod is processed into a smooth corner, which can reduce the friction resistance between the extension rod and the electric cylinder body, and effectively prevent the corners of the driving end from being scratched and worn by other components during use, thereby improving the operating efficiency of the electric cylinder and extending the service life of the electric cylinder. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0015] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;
[0016] Figure 3 This is a schematic diagram of the flange plate structure of the utility model;
[0017] Figure 4 This is a schematic diagram of the structure of the coupling of the utility model;
[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of the planetary screw of the utility model.
[0019] In the figure: 1. servo motor; 2. motor mounting plate; 3. electric cylinder body; 4. flange plate; 5. coupling; 501. half coupling; 502. elastic element; 6. planetary screw; 601. screw; 602. screw sleeve; 603. roller; 7. extension rod. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the utility model.
[0021] See also Figures 1 to 5 The utility model provides a technical solution: a direct-connected electric cylinder, including a servo motor 1, a motor mounting plate 2 is threadedly connected to the front outer wall of the servo motor 1, the front outer wall of the motor mounting plate 2 is threadedly connected to the tail end of an electric cylinder body 3, the head end of the electric cylinder body 3 is threadedly connected to a flange plate 4, the driving end of the servo motor 1 is threadedly connected to one end of the inner wall of a coupling 5, the other end of the inner wall of the coupling 5 is threadedly connected to a planetary screw 6, and the other end of the planetary screw 6 is plugged with an extension rod 7.
[0022] In this embodiment, Figure 2 and Figure 5 As shown, the planetary screw 6 is composed of a screw 601, a screw sleeve 602 and a plurality of rollers 603, wherein the screw sleeve 602 is rotatably connected with a plurality of rollers 603, and the outer wall of the screw 601 is screwed to the inner wall of the screw sleeve 602 and meshed with the outer wall of the roller 603; it should be noted that when using the direct-connected electric cylinder in the utility model, the operator can first start the servo motor 1, so that its output end starts to rotate and transmits it to the screw 601 through the coupling 5, so that the screw 601 is screwed into the front end of the screw sleeve 602 along the thread direction, and engages with the outer wall of the roller 603. At the same time, because the outer wall of the screw rod 601 and the outer wall of the roller 603 are meshed with each other, the roller 603 will roll between the screw rod 601 and the screw sleeve 602, thereby converting the rotational motion of the screw rod 601 into linear motion, and then driving the screw rod 601 in a linear direction to push the extended rod 7 connected to it to extend out from the inside of the electric cylinder body 3, completing the driving of the electric cylinder, and there is a certain gap between the roller 603 and the screw rod 601. This gap can compensate for the processing error and wear between the screw rod 601 and the screw sleeve 602, thereby improving the accuracy and stability of the electric cylinder.
[0023] In this embodiment, Figure 1 and Figure 2As shown, the servo motor 1 forms a telescopic mechanism through the planetary screw 6; it should be noted that when using the direct-connected electric cylinder in the utility model, the operator can first start the servo motor 1 to make its output end start to rotate, and transmit the rotational force generated by it to the screw 601 in the planetary screw 6 through the coupling 5, so that the screw 601 is driven to rotate. At the same time, the screw 601 is screwed into the inside of the screw sleeve 602 and meshes with the roller 603, thereby converting the rotational motion it is subjected to into a linear motion, pushing the extension rod 7 connected thereto to extend from the inside of the electric cylinder body 3 During this period, the speed and torque of the servo motor 1 can be adjusted by an external controller. Therefore, when the speed of the servo motor 1 increases, the relative speed between the screw 601 and the roller 603 will also increase, thereby increasing the speed of pushing the extension rod 7, and vice versa. If the torque of the servo motor 1 increases, the torque between the screw 601 and the roller 603 will also increase, thereby enabling the electric cylinder to withstand a larger load. Therefore, by controlling the speed and torque of the servo motor 1 and making it work together with the planetary screw 6, the extension rod 7 of the electric cylinder can be freely extended and precisely controlled.
[0024] In this embodiment, Figure 2 and Figure 4 As shown, the coupling 5 is an elastic coupling, which is composed of two half-couplings 501 and an elastic element 502, wherein the outer walls of the opposite sides of the two half-couplings 501 are threadedly connected by screws, and an elastic element 502 is also provided on the inner wall of the connection between the two half-couplings 501; it should be noted that the two half-couplings 501 are threadedly connected with the planetary screw 6 and the servo motor 1 respectively, so that the torque can be transmitted between the two. The elastic coupling is adopted in the utility model, and an elastic element 502 is also provided on the inner wall of the connection between the two half-couplings 501, and the screw 601 in the planetary screw 6 and the output end of the servo motor 1 just fit the left and right outer walls of the elastic element 502, and the setting of the elastic element 502 can buffer and absorb the mechanical vibration generated between the screw 601 and the output end of the servo motor 1 when relative displacement and angular deviation occur between the two, maintain the connection stability between the servo motor 1 and the planetary screw 6, and avoid the problem of increased wear of the servo motor 1 and the planetary screw 6 or mechanical failure.
[0025] In this embodiment, Figure 1 and Figure 3As shown, the motor mounting plate 2 and the flange plate 4 are both provided with screw holes, and the rear ends of the motor mounting plate 2 and the flange plate 4 are tightly fitted with the inner wall of the electric cylinder body 3; it should be noted that the electric cylinder body 3 in the utility model is threadedly connected with the flange plate 4 and the servo motor 1 respectively through screws and the flange plates 4 and the motor mounting plate 2 arranged at both ends. This connection method is convenient for disassembly and replacement, so that the maintenance and repair of the servo motor 1 and the electric cylinder can be completed quickly, and the flange plate 4 and the motor mounting plate 2 both adopt standardized sizes and tolerances, thereby ensuring the connection accuracy between the servo motor 1 and the electric cylinder body 3, and improving the overall performance and service life of the electric cylinder body 3.
[0026] In this embodiment, Figure 1 and Figure 2 As shown, the driving end of the extension rod 7 has rounded corners; it should be noted that during the use of the direct-connected electric cylinder, the extension rod 7 is driven by the servo motor 1 and the planetary screw 6 to extend and retract outward along the inner wall of the electric cylinder body 3, and during this period, the driving end of the extension rod 7 will rub against other components. Over time, this may cause wear and deformation of the driving end corners of the extension rod 7, thereby affecting the normal operation of the electric cylinder. Therefore, in the utility model, by adopting a processing method of blunting sharp edges, the driving end of the extension rod 7 is processed into rounded corners, which can reduce the friction resistance between the extension rod 7 and the electric cylinder body 3, and effectively prevent the driving end corners from being scratched and worn by other components during use, thereby improving the operating efficiency of the electric cylinder and extending the service life of the electric cylinder.
[0027] The use method and advantages of the utility model: When the direct-connected electric cylinder is used, the working process is as follows:
[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, firstly, the electric cylinder body 3 is threadedly connected with the flange plate 4 and the servo motor 1 through screws and the flange plates 4 and the motor mounting plate 2 arranged at both ends, and other components are connected by screw connection or plug-in connection to form a complete direct-connected electric cylinder. Then the operator can start the servo motor 1 to make its output end start to rotate, and transmit the rotational force generated by it to the screw 601 in the planetary screw 6 through the coupling 5, so that the screw 601 is driven to rotate. During this period, the elastic element 502 in the coupling 5 can buffer and absorb the mechanical vibration generated between the screw 601 and the servo motor 1, and maintain the connection stability between the servo motor 1 and the planetary screw 6. At the same time, the screw 601 will be screwed into the front end of the screw sleeve 602 along the thread direction and screw with the roller. The outer walls of 603 mesh with each other, so that the roller 603 rolls between the screw rod 601 and the screw sleeve 602, thereby converting the rotational motion of the screw rod 601 into linear motion, and then driving the screw rod 601 to push the connected extension rod 7 in the linear direction to extend from the inside of the electric cylinder body 3, thereby completing the driving of the electric cylinder. By changing the speed and torque of the servo motor 1, it works together with the planetary screw rod 6 to achieve free extension and precise control of the extension rod 7 of the electric cylinder. The extension rod 7 with rounded corners at the driving end will reduce the friction resistance between the electric cylinder body 3 during the extension and retraction operation along the inner wall of the electric cylinder body 3, and effectively prevent the corners of the driving end from being scratched and worn by other components during use, thereby improving the operating efficiency of the electric cylinder and extending the service life of the electric cylinder.
[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Technical staff in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A direct-coupled electric cylinder, comprising a servo motor (1), characterized in that: The front outer wall of the servo motor (1) is threadedly connected to a motor mounting plate (2), the front outer wall of the motor mounting plate (2) is threadedly connected to the rear end of the electric cylinder body (3), the head end of the electric cylinder body (3) is threadedly connected to a flange plate (4), the driving end of the servo motor (1) is threadedly connected to one end of the inner wall of the coupling (5), the other end of the inner wall of the coupling (5) is threadedly connected to a planetary screw (6), and the other end of the planetary screw (6) is plugged with an extension rod (7).
2. The direct-connected electric cylinder according to claim 1, characterized in that: The planetary screw (6) is composed of a screw (601), a screw sleeve (602) and a plurality of rollers (603), wherein the screw sleeve (602) is rotatably connected to the plurality of rollers (603), and the outer wall of the screw (601) is screwed to the inner wall of the screw sleeve (602) and meshed with the outer wall of the rollers (603).
3. The direct-connected electric cylinder according to claim 1, characterized in that: The servo motor (1) and the planetary screw (6) together form a telescopic mechanism.
4. The direct-connected electric cylinder according to claim 1, characterized in that: The coupling (5) is an elastic coupling, which is composed of two half-couplings (501) and an elastic element (502), wherein the outer walls of the opposite sides of the two half-couplings (501) are threadedly connected by screws, and an elastic element (502) is also provided on the inner wall at the connection between the two half-couplings (501).
5. The direct-connected electric cylinder according to claim 1, characterized in that: The surfaces of the motor mounting plate (2) and the flange plate (4) are both provided with screw holes, and the rear ends of the motor mounting plate (2) and the flange plate (4) are both tightly fitted with the inner wall of the electric cylinder body (3).
6. The direct-connected electric cylinder according to claim 1, characterized in that: The driving end of the extension rod (7) has rounded corners.