Linear and rotary double-motion electric cylinder

Abstract

The utility model relates to the technical field of electric cylinders, and discloses a linear and rotary double-motion electric cylinder which comprises a cylinder body. The ball screw is arranged in the cylinder body; the motor is connected with the tail end of the cylinder body and is used for driving the ball screw to rotate; the lead screw nut is in threaded connection with the surface of the ball screw; the nut sleeve is fixedly mounted at one end of the lead screw nut; the front end cover is connected to one end, far away from the motor, of the cylinder body; the piston rod is connected to the other end of the nut sleeve, one end of the piston rod penetrates through the front end cover and extends to the outer side of the front end cover, according to the linear and rotary double-motion electric cylinder, through the design of a mechanical structure, the electric cylinder can not only conduct high-precision linear motion, but also achieve rotary motion, the application range of the electric cylinder is greatly expanded, and the linear and rotary double-motion electric cylinder is suitable for popularization and application. And more complex working requirements are met, and the operation convenience and the equipment flexibility are improved.

Description

Technical Field

[0001] This utility model relates to the field of electric cylinder technology, specifically to a dual-motion electric cylinder that combines linear and rotary motion. Background Technology

[0002] With the advancement and widespread adoption of permanent magnet synchronous motor technology, electric cylinders, as a new type of drive actuator, have been widely adopted in numerous industrial applications. Electric cylinders, with their high precision, excellent speed and torque control, accurate positioning capabilities, as well as advantages such as energy saving, environmental friendliness, and ease of operation, have become the preferred component in automated equipment.

[0003] In existing electric cylinder designs, a ball screw and nut sleeve are typically used internally, supplemented by a guide mechanism, to ensure that the piston rod can make smooth and linear movements inside the electric cylinder. This design effectively improves the motion accuracy and efficiency of the electric cylinder.

[0004] Although existing electric cylinder technology can meet the application requirements of various linear motions, in some special industrial applications, customer needs go beyond simple linear motion. Specifically, there is an application requirement for electric cylinders to perform linear motion while simultaneously performing rotary motion. Under such requirements, existing electric cylinder technology is inadequate and cannot meet the need for both linear and rotary motion. Therefore, we propose a dual-motion electric cylinder that combines linear and rotary motion to solve the aforementioned problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a dual-motion electric cylinder capable of both linear and rotary motion, solving the problem that electric cylinders cannot simultaneously perform linear and rotary motion.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a linear and rotary dual-motion electric cylinder, including a cylinder body;

[0007] A ball screw is disposed within the cylinder body;

[0008] An electric motor, connected to the end of the cylinder, is used to drive the ball screw to rotate;

[0009] The lead screw nut is screwed onto the surface of the ball screw.

[0010] A nut sleeve is fixedly installed at one end of the lead screw nut;

[0011] The front end cover is connected to the end of the cylinder block furthest from the motor.

[0012] The piston rod is fixedly connected to the other end of the nut sleeve, with one end passing through the front end cover and extending to the outside of the front end cover;

[0013] A needle roller is provided on the front end cover, and the surface of the piston rod is provided with a groove adapted to the needle roller.

[0014] Preferably, the motor is fixedly connected to the end of the cylinder by bolts.

[0015] Preferably, a coupling is fixedly installed at the output end of the motor, one end of the ball screw is installed on the coupling, a bearing is fixed on the ball screw, and the ball screw is installed on the end of the cylinder body near the motor via the bearing.

[0016] Preferably, the front cover has through holes at its four corners, and fixing bolts are installed in the through holes. One end of the fixing bolt passes through the through hole of the front cover and is threadedly connected to the threaded hole at one end of the cylinder body, thereby realizing the connection and locking of the front cover and the cylinder body.

[0017] Preferably, a linear bearing is fixedly installed inside the front end cover, and the piston rod can slide laterally inside the linear bearing.

[0018] Preferably, the inner sidewall of the front cover is provided with a mounting hole adapted to the needle roller, one end of the needle roller is located in the mounting hole and rotates in the mounting hole, and the other end of the needle roller is located in the groove corresponding to the outer surface of the piston rod. There can be multiple sets of needle rollers.

[0019] Beneficial effects

[0020] This invention provides a dual-motion electric cylinder with both linear and rotary motion. Compared with the prior art, it has the following advantages:

[0021] This dual-motion electric cylinder, through its mechanical structure design, enables not only high-precision linear motion but also rotary motion, greatly expanding the application range of electric cylinders, meeting more complex work requirements, and improving the convenience of operation and the flexibility of equipment. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the piston rod structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the nut sleeve structure of this utility model.

[0025] In the diagram: 101, cylinder block; 102, motor; 103, coupling; 104, bearing; 105, ball screw; 106, screw nut; 107, nut sleeve; 108, front end cover; 109, piston rod; 110, linear bearing; 111, mounting hole; 112, needle roller; 113, fixing bolt; 114, groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1-3 As shown:

[0028] A dual-motion electric cylinder with linear and rotary motion, comprising a cylinder body 101;

[0029] The ball screw 105 is disposed inside the cylinder body 101;

[0030] Motor 102 is connected to the end of cylinder 101. Motor 102 is fixedly connected to the end of cylinder 101 by bolts and is used to drive ball screw 105 to rotate. Coupling 103 is fixedly installed at the output end of motor 102. One end of ball screw 105 is installed on coupling 103. Bearing 104 is fixed on ball screw 105. Ball screw 105 is installed at the end of cylinder 101 near motor 102 through bearing 104.

[0031] The lead screw nut 106 is screwed onto the surface of the ball screw 105;

[0032] Nut sleeve 107 is fixedly installed at one end of screw nut 106;

[0033] The front cover 108 is connected to the end of the cylinder body 101 away from the motor 102. The front cover 108 has through holes at its four corners and fixing bolts 113 are installed in the through holes. One end of the fixing bolts 113 passes through the through holes of the front cover 108 and is threadedly connected to the threaded hole at one end of the cylinder body 101 to achieve the connection and locking of the front cover 108 and the cylinder body 101.

[0034] The piston rod 109 is fixedly connected to the other end of the nut sleeve 107. One end of the piston rod passes through the front cover 108 and extends to the outside of the front cover 108. A linear bearing 110 is fixedly installed inside the front cover 108. The piston rod 109 can slide laterally inside the linear bearing 110.

[0035] A needle roller 112 is provided on the front end cover 108, and the surface of the piston rod 109 is provided with a groove 114 that is adapted to the needle roller 112. The inner side wall of the front end cover 108 is provided with a mounting hole 111 that is adapted to the needle roller 112. One end of the needle roller 112 is provided in the mounting hole 111 and rotates in the mounting hole 111, while the other end of the needle roller 112 is located in the corresponding groove 114. There can be multiple sets of needle rollers 112.

[0036] In this embodiment: When in use, the motor 102 of the linear and rotary dual-motion electric cylinder is fixedly connected to the end of the cylinder body 101 by bolts (not shown in the figure);

[0037] After the motor 102 starts, it is connected to one end of the ball screw 105 through the coupling 103, driving the ball screw 105 to rotate. The ball screw 105 is connected and installed to the cylinder body 101 through the bearing 104. The setting of the bearing 104 increases the stability of the rotation of the ball screw 105.

[0038] The lead screw nut 106 is screwed onto the surface of the ball screw 105. As the ball screw 105 rotates, it drives the lead screw nut 106, nut sleeve 107, and piston rod 109 to move (but without the constraint of the needle rollers 112, the lead screw nut 106, nut sleeve 107, and piston rod 109 can be in a free state, possibly rotating or not). The surface of the piston rod 109 is provided with grooves 114 that are adapted to the needle rollers 112. There can be multiple sets of needle rollers 112. One end of the needle roller 112 is set in the mounting hole 111 inside the front cover 108, and the needle roller 112 can rotate in the mounting hole 111. The other end is located in the corresponding groove 114. The setting of the needle roller 112 and the groove 114 can form an integrated piston mechanism. The piston mechanism can be limited to move on the ball screw 105. The piston mechanism moves according to the curve shape of the groove 114 on the outer surface of the piston rod 109, so that it can achieve both linear motion and rotational motion.

[0039] This solution, through the design of the mechanical structure, enables the electric cylinder to not only perform high-precision linear motion but also rotary motion, greatly expanding the application range of the electric cylinder, meeting more complex work requirements, and improving the convenience of operation and the flexibility of the equipment.

[0040] The front cover 108 is connected to the end of the cylinder 101 away from the motor 102, and a linear bearing 110 is installed inside. The piston rod 109 can slide laterally within the linear bearing 110. This design can reduce friction and improve the accuracy and stability of linear motion.

[0041] It should be noted that all electrical equipment involved in this product is powered by an external power source.

[0042] It should be noted that the piston rod 109 has grooves 114 on its surface, which can be designed with different curved trajectories according to actual design requirements to meet the rotation requirements of the piston mechanism.

[0043] It should be noted that a ball bushing is installed in the mounting hole 111 of the front cover 108, and one end of the needle roller 112 is located in the mounting hole 111 and in the ball bushing, and can rotate in the ball bushing, further increasing the smoothness of the rotation of the needle roller 112.

[0044] The working principle and usage process of this utility model: When the linear and rotary dual-motion electric cylinder is in use, after the motor 102 starts, it connects to one end of the ball screw 105 via the coupling 103, driving the ball screw 105 to rotate. The screw nut 106 is screwed onto the surface of the ball screw 105. As the ball screw 105 rotates, it drives the screw nut 106, nut sleeve 107, and piston rod 109 to move (but without the constraint of the needle roller 112, the screw nut 106, nut sleeve 107, and piston rod 109 can be in a free state). The piston rod 109 has a groove 114 on its surface that is adapted to the needle roller 112. At the same time, one end of the needle roller 112 is located in the mounting hole 111 inside the front cover 108 and can rotate in the mounting hole 111. The other end is located in the corresponding groove 114. The arrangement of the needle roller 112 and the groove 114 can form a piston mechanism. The piston mechanism moves according to the curve shape of the groove 114 on the outer surface of the piston rod 109, so that it can achieve both linear motion and rotational motion.

[0045] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dual-motion electric cylinder, comprising linear and rotary motion, characterized in that: Including the cylinder block (101); A ball screw (105) is disposed inside the cylinder (101); The motor (102) is connected to the end of the cylinder (101) and is used to drive the ball screw (105) to rotate; A lead screw nut (106) is screwed onto the surface of a ball screw (105); A nut sleeve (107) is fixedly installed at one end of the lead screw nut (106); A front cover (108) is attached to the end of the cylinder (101) away from the motor (102); The piston rod (109) is fixedly connected to the other end of the nut sleeve (107), with one end passing through the front cover (108) and extending to the outside of the front cover (108); A needle roller (112) is provided on the front end cover (108), and the surface of the piston rod (109) is provided with a groove (114) that is compatible with the needle roller (112).

2. The electric cylinder with both linear and rotary motion according to claim 1, characterized in that: The motor (102) is fixedly connected to the end of the cylinder (101) by bolts.

3. The electric cylinder with both linear and rotary motion according to claim 1, characterized in that: A coupling (103) is fixedly installed at the output end of the motor (102). One end of the ball screw (105) is installed on the coupling (103). A bearing (104) is fixed on the ball screw (105). The ball screw (105) is installed on the cylinder (101) near the motor (102) through the bearing (104).

4. The electric cylinder with both linear and rotary motion according to claim 1, characterized in that: The front cover (108) has through holes at its four corners, and fixing bolts (113) are installed in the through holes. One end of the fixing bolt (113) passes through the through hole of the front cover (108) and is threadedly connected to the threaded hole at one end of the cylinder (101) to realize the connection and locking of the front cover (108) and the cylinder (101).

5. A dual-motion electric cylinder with linear and rotary motion according to claim 1, characterized in that: A linear bearing (110) is fixedly installed inside the front end cover (108), and the piston rod (109) can slide laterally inside the linear bearing (110).

6. The electric cylinder with both linear and rotary motion according to claim 1, characterized in that: The inner sidewall of the front cover (108) is provided with a mounting hole (111) that is compatible with the needle roller (112). One end of the needle roller (112) is located in the mounting hole (111) and rotates in the mounting hole (111). The other end of the needle roller (112) is located in the groove (114) corresponding to the outer surface of the piston rod (109). There can be multiple sets of needle rollers (112).

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