High-speed reciprocating rod-out electric cylinder

Abstract

The utility model discloses a high-speed reciprocating rod-out electric cylinder which comprises a cylinder barrel, a piston rod assembly is movably arranged in the cylinder barrel, one side of the cylinder barrel is connected with a driving motor, the driving motor drives the piston rod assembly to do linear telescopic motion in the cylinder barrel through a transmission mechanism, and the transmission mechanism comprises a cam assembly and a connecting rod. The output end of the motor is connected with an output shaft, the output shaft is in transmission connection with the cam assembly, a protruding block is arranged on the output shaft, a groove matched with the protruding block in a clamped mode is formed in the cam assembly, the cam assembly comprises a first connecting piece which is eccentrically arranged, and a second connecting piece is fixedly connected to the end, close to the motor, of the piston rod assembly. One end of the connecting rod is in eccentric rotation connection with the cam assembly through the first connecting piece, the other end of the connecting rod is connected with the piston rod assembly through the second connecting piece, high-speed rotation of the driving motor is converted into reciprocating motion of the piston rod assembly through the cam assembly, and limitation of screw pitch and friction like lead screw transmission is not needed. And high-frequency motion can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric cylinder technical field, especially a kind of high-speed reciprocating out rod electric cylinder. BACKGROUND

[0002] As a common automatic execution element, electric cylinder mainly includes driving motor (such as servo motor, stepper motor and other types of motor), transmission mechanism, cylinder and piston. The working principle of electric cylinder is to transmit the power of driving motor to piston through transmission mechanism, so as to push piston to move linearly along the axial direction of cylinder. At present, a kind of transmission mode widely used in market is screw transmission, which can efficiently convert the rotary motion of servo motor into linear motion. The main advantage of screw transmission is that it has high motion accuracy and good stability, which can play an important role in precision control application scenarios. However, screw transmission also has certain limitations, mainly reflected in its relatively slow speed. The speed of screw transmission is usually limited by pitch and motor speed, which is difficult to meet the demand of high-frequency motion. Therefore, it is necessary to improve. SUMMARY

[0003] The utility model discloses a kind of high-speed reciprocating out rod electric cylinder, simple and reasonable structure, easy operation, the high-speed rotation of driving motor can be quickly converted into reciprocating motion of piston rod assembly by cam assembly, without being limited by pitch and friction like screw transmission, which makes electric cylinder perform well in high-frequency motion scenarios.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] The utility model discloses a kind of high-speed reciprocating out rod electric cylinder, including cylinder, piston rod assembly is movably arranged in the cylinder, one side of the cylinder is connected with driving motor, the driving motor is driven piston rod assembly to do linear telescopic motion in cylinder by transmission mechanism, the transmission mechanism includes cam assembly and connecting rod, the output end of the driving motor is connected with output shaft, the output shaft is connected with cam assembly transmission, output shaft is provided with protruding block, cam assembly is provided with the recess of the protruding block and is engaged with the recess, the cam assembly includes eccentrically arranged first connecting piece, the second connecting piece is fixedly connected on the end of piston rod assembly close to motor, one end of the connecting rod is eccentrically rotatably connected with cam assembly by first connecting piece, the other end of the connecting rod is connected with piston rod assembly by second connecting piece.

[0006] Further, the cam assembly includes first cam and second cam, and the first connecting piece is eccentrically arranged between the first cam and the second cam.

[0007] Furthermore, an end cap is fixedly connected to the side of the cylinder away from the motor, and a dustproof ring is provided between the end cap and the piston rod assembly. The end cap is provided with a first mounting groove that corresponds to and cooperates with the dustproof ring.

[0008] Furthermore, the piston rod assembly includes a piston and a piston rod, the piston and piston rod are fixedly connected, a connecting rod seat is fixedly connected to the end of the piston away from the piston rod, and the second connecting member is fixedly connected to the connecting rod seat.

[0009] Furthermore, the connecting rod seat has an outwardly protruding first mounting part and a second mounting part on the end face near the motor. The first mounting part has a first mounting hole, and the second mounting part has a second mounting hole. The first mounting hole and the second mounting hole are coaxially arranged. The second connector is fixedly connected to the first mounting hole and the second mounting hole. The connecting rod is disposed between the first mounting part and the second mounting part.

[0010] Furthermore, the transmission mechanism is covered with a motor mount, which is fixedly connected to the cylinder.

[0011] Furthermore, a first needle roller bearing is provided between the connecting rod and the first connecting member.

[0012] Furthermore, a second needle roller bearing is provided between the connecting rod and the second connecting member.

[0013] Furthermore, both the first and second connectors are pins.

[0014] Furthermore, the drive motor is a servo motor.

[0015] The beneficial effects of this utility model are as follows: Through the ingenious cooperation of the drive motor, cam assembly, and connecting rod, this utility model can realize the high-speed reciprocating motion of the piston rod assembly, which is suitable for some specific application scenarios that require high-frequency operation. The specific working process is as follows: When the drive motor starts, it will drive the cam assembly to rotate. The rotation of the cam assembly will drive the connecting rod to push and pull the piston rod assembly through the first connecting piece, so that it performs high-speed and reciprocating motion inside the cylinder, thereby meeting the usage requirements of high-frequency application scenarios. The high-speed rotation of the drive motor can be quickly converted into the reciprocating motion of the piston rod assembly through the cam assembly, without being limited by pitch and friction like the lead screw drive. This design makes the electric cylinder perform well in high-frequency motion scenarios. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model;

[0018] Figure 3 is the installation local section view between the end cover and the cylinder barrel;

[0019] Figure 4 is the local section view of the transmission mechanism in the utility model;

[0020] Figure 5 is the structure schematic view of the utility model hides the cylinder barrel, the end cover and the motor base;

[0021] Figure 6 is the exploded structure schematic view of the transmission mechanism;

[0022] Figure 7 is the connection structure schematic view between the connecting seat, the connecting rod and the first cam.

[0023] Figures 1-7 In the utility model: 1, cylinder barrel;11, end cover;111, dustproof ring;112, mounting screw;12, motor base;2, piston rod assembly;21, piston;211, wear ring;212, magnetic ring;213, anti-rotation key;22, piston rod;221, guide sleeve;222, piston rod stud;23, connecting rod seat;231, second connecting piece;2311, second screw;232, first mounting portion;2321, first mounting hole;233, second mounting portion;2331, second mounting hole;3, driving motor;31, output shaft;4, transmission mechanism;41, cam assembly;411, first cam;4111, groove;412, second cam;413, first connecting piece;4131, first screw;42, connecting rod;421, first needle bearing;422, second needle bearing. DETAILED DESCRIPTION

[0024] The utility model will be further explained in connection with the drawings.

[0025] As Figures 1-7The high-speed reciprocating electric cylinder shown includes a cylinder barrel 1, within which a piston rod assembly 2 is movably mounted. A drive motor 3 is connected to one side of the cylinder barrel 1. The drive motor 3 drives the piston rod assembly 2 to perform linear extension and retraction motion along the axis of the cylinder barrel 1 via a transmission mechanism 4. The transmission mechanism 4 includes a cam assembly 41 and a connecting rod 42. An output shaft 31 is connected to the output end of the drive motor 3, and the output shaft 31 is drively connected to the cam assembly 41. A protrusion is provided on the output shaft 31, and a groove 4111 is provided on the cam assembly 41 to engage with the protrusion, ensuring a stable connection. The drive motor 3's output shaft 31 rotates, causing the cam assembly 41 to rotate. The cam assembly 41 includes a first cam 411 and a second cam 412. A first connecting member 413 is eccentrically disposed between the first cam 411 and the second cam 412. Preferably, in this embodiment, the first connecting member 413 and the first cam 411 are fixedly connected by a first screw 4131 to ensure a stable and reliable connection between the first connecting member 413 and the first cam 411. A second connecting member 231 is fixedly connected to one end of the piston rod assembly 2 near the motor. One end of the connecting rod 42 is connected by a first connecting member 231. The first connecting member 413 is eccentrically rotatably connected to the cam assembly 41, and the other end of the connecting rod 42 is connected to the piston rod assembly 2 via the second connecting member 231, ensuring a stable and reliable connection. Preferably, in this embodiment, both the first connecting member 413 and the second connecting member 231 are pins. Pins, as a common connecting element, have the advantages of simple structure, convenient installation, and high reliability. Preferably, in this embodiment, the drive motor 3 is a servo motor. Servo motors have the advantage of fast response speed. This utility model, through the ingenious cooperation of the drive motor 3, the cam assembly 41, and the connecting rod 42, can achieve high efficiency of the piston rod assembly 2. High-speed reciprocating motion is suitable for specific application scenarios that require high-frequency operation. The specific working process is as follows: When the drive motor 3 starts, it will drive the cam assembly 41 to rotate. The rotation of the cam assembly 41 will drive the connecting rod 42 to push and pull the piston rod assembly 2 through the first connecting member 413, so that it performs high-speed and reciprocating motion inside the cylinder 1, thereby meeting the usage requirements of high-frequency application scenarios. The high-speed rotation of the drive motor 3 can be quickly converted into the reciprocating motion of the piston rod assembly 2 through the cam assembly 41, without being limited by pitch and friction like the lead screw drive. This design makes the electric cylinder perform well in high-frequency motion scenarios.

[0026] Preferably, in this embodiment, the transmission mechanism 4 is covered with a motor base 12, which can play a role in dust prevention, and the motor base 12 is fixedly connected to the cylinder 1.

[0027] Preferably, in this embodiment, the cylinder 1 is fixedly connected with an end cover 11 away from the motor, specifically, the end cover 11 is fixedly connected with the cylinder 1 through mounting screws 112, which ensures the firmness and reliability of the connection, and a dustproof ring 111 is arranged between the end cover 11 and the piston rod assembly 2, which plays a good sealing role and prevents dust and other impurities from entering the inside of the cylinder 1, and the end cover 11 is provided with a first mounting groove corresponding to the dustproof ring 111 to avoid the dustproof ring 111 from being undesirably detached.

[0028] Preferably, in this embodiment, the piston rod assembly 2 comprises a piston 21 and a piston rod 22, and the piston 21 is fixedly connected with the piston rod 22 to ensure the stable and reliable connection between the piston 21 and the piston rod 22, and a connecting rod socket 23 matched with the connecting rod 42 is fixedly connected to one end of the piston 21 away from the piston rod 22, and the second connecting piece 231 is fixedly connected to the connecting rod socket 23, and a piston rod 22 stud is fixedly connected to one end of the piston rod 22 away from the piston 21, and a guide sleeve 221 is sleeved on the piston rod 22, which guides the linear motion of the piston rod 22, reduces friction and wear, and prolongs the service life, and in order to further improve the performance and durability of the piston 21, a wear-resistant ring 211, an anti-rotation key 213 and a magnetic ring 212 are arranged on the piston 21, the wear-resistant ring 211 can effectively resist wear and prolong the service life of the piston 21, the anti-rotation key 213 is used to prevent the piston 21 from rotating during movement and ensure its stable operation, and the magnetic ring 212 can be used to detect the position and movement state of the piston 21 and provide reliable data support for accurate control of the system.

[0029] Preferably, in this embodiment, the connecting rod socket 23 is provided with outwardly protruding first and second mounting portions 232 and 233 on the end face close to the motor, the first mounting portion 232 is provided with a first mounting hole 2321, the second mounting portion 233 is provided with a second mounting hole 2331, the first and second mounting holes 2321 and 2331 are coaxially arranged, the second connecting piece 231 is fixedly connected into the first and second mounting holes 2321 and 2331, and the connecting rod 42 is arranged between the first and second mounting portions 232 and 233 to ensure the stable and reliable connection and prevent the connecting rod 42 from being detached from the connecting rod socket 23, and preferably, in this embodiment, the second connecting piece 231 is fixedly connected with the second mounting portion 233 through a second screw 2311 to ensure the stable and reliable connection.

[0030] Preferably, in this embodiment, a first needle bearing 421 is arranged between the connecting rod 42 and the first connecting piece 413, which can effectively reduce the friction therebetween and improve the service life.

[0031] Preferably, in the embodiment, the second needle roller bearing 422 is arranged between the connecting rod 42 and the second connecting piece 231, so as to effectively reduce the friction therebetween and improve the service life.

[0032] The above merely describes preferred embodiments of the present application, and equivalent changes or modifications made to the structure, features and principles described in the patent application scope of the present application are included in the patent application scope of the present application.

Claims

1. A high-speed reciprocating out-bar electric cylinder, comprising a cylinder barrel (1), a piston rod assembly (2) movably arranged in the cylinder barrel (1), and a driving motor (3) connected to one side of the cylinder barrel (1), wherein the driving motor (3) drives the piston rod assembly (2) to make linear extension and retraction movement in the cylinder barrel (1) through a transmission mechanism (4), characterized in that: The transmission mechanism (4) comprises a cam assembly (41) and a connecting rod (42), an output shaft (31) is connected to the output end of the driving motor (3), the output shaft (31) is in transmission connection with the cam assembly (41), the output shaft (31) is provided with a protrusion, the cam assembly (41) is provided with a groove (4111) matched with the protrusion, the cam assembly (41) comprises a first connecting piece (413) arranged eccentrically, a second connecting piece (231) is fixedly connected to one end of the piston rod assembly (2) close to the motor, one end of the connecting rod (42) is in eccentric rotation connection with the cam assembly (41) through the first connecting piece (413), and the other end of the connecting rod (42) is connected with the piston rod assembly (2) through the second connecting piece (231).

2. The high speed reciprocating rod-out electrical cylinder of claim 1, wherein: The cam assembly (41) comprises a first cam (411) and a second cam (412), and the first connecting piece (413) is arranged eccentrically between the first cam (411) and the second cam (412).

3. The high speed reciprocating rod-out electrical cylinder of claim 1, wherein: The cylinder (1) is fixedly connected with an end cover (11) away from the motor, a dustproof ring (111) is arranged between the end cover (11) and the piston rod assembly (2), and the end cover (11) is provided with a first mounting groove corresponding to the dustproof ring (111).

4. The high speed reciprocating rod-out electrical cylinder of claim 1, wherein: The piston rod assembly (2) comprises a piston (21) and a piston rod (22), the piston (21) is fixedly connected with the piston rod (22), one end of the piston (21) away from the piston rod (22) is fixedly connected with a connecting rod seat (23), and the connecting rod seat (23) is fixedly connected with the second connecting piece (231).

5. A high speed reciprocating rod-out electrical cylinder according to claim 4, characterized in that: The connecting rod seat (23) is provided with a first mounting portion (232) and a second mounting portion (233) protruding outward on the end face close to the motor, the first mounting portion (232) is provided with a first mounting hole (2321), the second mounting portion (233) is provided with a second mounting hole (2331), the first mounting hole (2321) and the second mounting hole (2331) are coaxially arranged, the second connecting piece (231) is fixedly connected into the first mounting hole (2321) and the second mounting hole (2331), and the connecting rod (42) is arranged between the first mounting portion (232) and the second mounting portion (233).

6. The high speed reciprocating rod-out electrical cylinder of claim 1, wherein: The transmission mechanism (4) is provided with a motor seat (12), and the motor seat (12) is fixedly connected with the cylinder (1).

7. The high speed reciprocating rod-out electrical cylinder of claim 1, wherein: The first connecting piece (413) and the second connecting piece (231) are both pin shafts.

8. The high speed reciprocating rod-out electrical cylinder of claim 1, wherein: The driving motor (3) is a servo motor.

9. The high speed reciprocating rod-out electrical cylinder of claim 1, wherein: ​ 10. The high speed reciprocating rod-out electrical cylinder of claim 1, wherein: ​

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