Rotary electric cylinder

Abstract

The utility model discloses a rotary electric cylinder, which relates to the technical field of electric cylinders and comprises a motor, a cylinder body, a transmission mechanism and an actuating mechanism, the cylinder body comprises a lower connecting block, a transmission case, a cylinder barrel and an upper connecting block, the transmission mechanism consists of a translation component and a rotating component, and the actuating mechanism is a piston rod; the motor is in transmission connection with one end of a lead screw in the rotating assembly through the transmission box, and the other end of the lead screw is clamped in the piston rod to do axial non-rotating motion. The piston rod is used as an executing mechanism of the rotary electric cylinder, the translation assembly and the rotating assembly are adopted to move to drive the piston rod to stretch out, draw back and rotate for transmission, the operation precision and the load capacity are improved, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric cylinder technical field especially is related to a rotary electric cylinder. BACKGROUND

[0002] With the development of social technology, the application of electric cylinder is more and more extensive, but the existing rotary electric cylinder generally adopts the mode of motor driving ball screw rotation, and realizes linear motion through the spiral motion between ball screw and nut. This mechanism has obvious technical defects in precision, load capacity, response speed, energy consumption, maintenance cost and environmental adaptability. Therefore, it is very important to develop a new type of rotary electric cylinder.

[0003] 1. The traditional rotary electric cylinder is directly connected with the screw rod, and the precision is limited. The element may be elastically deformed when stressed, reducing the precision of the electric cylinder.

[0004] 2. The load capacity of the traditional rotary electric cylinder is limited. The structural design of the traditional rotary electric cylinder is limited by factors such as material strength and transmission efficiency, resulting in limited load capacity.

[0005] 3. The maintenance cost of the traditional rotary electric cylinder is high. The structure of the traditional rotary electric cylinder is relatively complex, and multiple cylinder bodies are needed, which increases the difficulty and cost of maintenance and maintenance. UTILITY MODEL CONTENT

[0006] In view of the above problems, the utility model provides a rotary electric cylinder, which realizes the use of piston rod as the actuating mechanism of rotary electric cylinder, adopts the mode of transmission of translation assembly and rotation assembly motion to drive the piston rod to extend and retract and rotate, improves the running precision and load capacity and reduces the maintenance cost.

[0007] To achieve the above purpose, the utility model adopts the technical scheme of:

[0008] A rotary electric cylinder, comprising a motor, a cylinder body, a transmission mechanism and an actuating mechanism, the cylinder body comprising a lower connecting block, a transmission box, a cylinder barrel and an upper connecting block, the transmission mechanism being composed of a translation assembly and a rotation assembly, and the actuating mechanism being a piston rod; the motor is connected and driven with the screw rod at one end of the rotation assembly through the transmission box, and the other end of the screw rod is clamped in the piston rod for axial non-rotating motion; the translation assembly comprises a screw rod nut sleeved on the screw rod, the screw rod nut is clamped in the cylinder barrel for axial motion, and a piston rod sleeve sleeved on the piston rod for axial sliding is connected to the cylinder barrel at the end of the screw rod nut close to the piston rod; the cylinder barrel is fixedly connected with the piston rod through the upper connecting block, and the screw rod is fixedly connected with the transmission box through a thrust bearing.

[0009] As a further improvement of the above scheme, the motor is a rotary drive motor, and a lower connecting block is arranged between the motor and the transmission box.

[0010] As a further improvement of the above-mentioned scheme, the connecting block is arranged between the lead screw and the lead screw nut, and the lead screw and the lead screw nut are in T-shaped thread cooperation.

[0011] As a further improvement of the above-mentioned scheme, the thrust bearing is a bidirectional thrust ball bearing.

[0012] As a further improvement of the above-mentioned scheme, the piston rod is internally hollow and axially provided with a clamping groove, and the other end of the lead screw is movably connected with the clamping groove on the inner wall of the piston rod through a pin.

[0013] Compared with the prior art, the beneficial effects of the utility model are that: the translation assembly and the rotation assembly are used as the transmission mechanism, the friction can be reduced, the force on the lead screw is more uniform, the transmission efficiency is improved, the running precision and the load capacity are improved, and the maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a front view structural schematic diagram of the utility model.

[0015] Figure 2 It is a longitudinal section internal structure schematic diagram of the utility model.

[0016] Figure 3 It is a three-dimensional structure schematic diagram of the translation assembly in the utility model.

[0017] Figure 4 It is a three-dimensional structure schematic diagram of the rotation assembly in the utility model.

[0018] In the drawing: 1, motor; 2, lower connecting block; 3, transmission box; 4, cylinder barrel; 5, upper connecting block; 6, thrust bearing; 7, lead screw; 8, lead screw nut; 9, piston rod sleeve; 10, connecting block; 11, piston rod; 12, pin. DETAILED DESCRIPTION

[0019] In order to make the person skilled in the art better understand the technical scheme, the utility model is described in detail below in combination with examples, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the utility model.

[0020] As Figures 1-4As shown in the embodiment, the specific scheme is: a rotary electric cylinder, comprising a motor 1, a cylinder body, a transmission mechanism and an execution mechanism, the cylinder body comprises a lower connecting block 2, a transmission box 3, a cylinder barrel 4 and an upper connecting block 5, the transmission mechanism is composed of a translation assembly and a rotation assembly, and the execution mechanism is a piston rod 11; the motor 1 is connected with one end of a lead screw 7 in the rotation assembly through the transmission box 3 for transmission, the other end of the lead screw 7 is clamped in the piston rod 11 for axial non-rotating movement; the translation assembly comprises a lead screw nut 8 sleeved on the lead screw 7, the lead screw nut 8 is clamped in the cylinder barrel 4 for axial movement, and the cylinder barrel 4 is connected with a piston rod sleeve 9 sleeved on the piston rod 11 for axial sliding at one end of the lead screw nut 8 close to the piston rod 11; the cylinder barrel 4 is fixedly connected with the piston rod 11 through the upper connecting block 5, and the lead screw 7 is fixedly connected with the transmission box 3 through a thrust bearing 6.

[0021] As Figures 1-4 shown, as a preferred mode of the above embodiment, the motor 1 is a rotary drive motor, and the motor 1 and the transmission box 3 are provided with the lower connecting block 2.

[0022] As Figures 1-4 shown, as a preferred mode of the above embodiment, the lead screw 7 and the lead screw nut 8 are provided with a connecting block 10, and the lead screw 7 and the lead screw nut 8 are in T-shaped thread cooperation.

[0023] As Figures 1-4 shown, as a preferred mode of the above embodiment, the thrust bearing 6 is a bidirectional thrust ball bearing.

[0024] As Figures 1-4 shown, as a preferred mode of the above embodiment, the piston rod 11 is hollow and axially provided with a clamping groove, and the other end of the lead screw 7 is movably connected with the clamping groove on the inner wall of the piston rod 11 through a pin 12.

[0025] The utility model discloses specific working principle:

[0026] The motor 1, the lower connecting piece and the transmission box 3 are connected in sequence, the lead screw 7 is fixed to the transmission box 3 by the thrust bearing 6, so that the lead screw 7 can only rotate in the transmission box 3 and cannot move up and down, thereby reducing the friction between the lead screw 7 and the transmission box 3, the connecting block 10 connects the lead screw 7 and the lead screw nut 8, the lead screw nut 8 is connected to the cylinder body through the clamping groove design, the lead screw 7 drives the lead screw nut 8 to move axially along the lead screw 7 through the T-shaped thread, so as to realize the extension and retraction function of the piston rod 11. The top of the lead screw 7 is punched to insert the pin 12, the piston rod 11 is internally provided with a clamping groove, the lead screw 7 drives the pin 12 to rotate when rotating, so as to synchronously rotate the piston rod 11, thereby realizing the rotation function of the piston rod 11. When energized, the motor 1 drives the lead screw 7 to rotate, the pin 12 rotates together with the lead screw 7 when the lead screw 7 rotates, thereby driving the piston rod 11 to rotate, at the same time, the lead screw 7 drives the thrust bearing 6 to rotate, so as to drive the piston rod 11 to move axially, at this time, the piston rod 11 performs the up-down rotation movement.

[0027] It should be noted that in this paper, the terms include, contain or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. The principle and implementation mode of the technical scheme of the present application are described by specific examples in this paper, and the above example is only used to help understand the method and its core idea of the present application. The above description is only the preferred embodiment of the present application. It should be pointed out that due to the limitation of language expression, there are infinite specific structures objectively, for ordinary skilled persons in the technical field, without departing from the principle of the present application, some improvements, decorations or changes can be made, or the above technical features can be combined in a proper way; these improvements, decorations, changes or combinations, or the direct application of the concept and technical scheme of the present application to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. A rotary electric cylinder comprising a motor (1), a cylinder, a transmission mechanism and an actuator, characterized in that, The cylinder comprises a lower connecting block (2), a transmission box (3), a cylinder barrel (4) and an upper connecting block (5), the transmission mechanism is composed of a translation assembly and a rotation assembly, and the actuating mechanism is a piston rod (11); the motor (1) is connected in transmission with one end of a lead screw (7) in the rotation assembly through the transmission box (3), the other end of the lead screw (7) is clamped in the piston rod (11) to make axial non-rotating movement; the translation assembly comprises a lead screw nut (8) sleeved on the lead screw (7), the lead screw nut (8) is clamped in the cylinder barrel (4) to make axial movement, and the cylinder barrel (4) is connected with a piston rod sleeve (9) sleeved on the piston rod (11) to make axial sliding at the end of the lead screw nut (8) close to the piston rod (11); the cylinder barrel (4) is fixedly connected with the piston rod (11) through the upper connecting block (5), and the lead screw (7) is fixedly connected with the transmission box (3) through a thrust bearing (6).

2. A rotary electric cylinder according to claim 1, characterized in that The motor (1) is a rotary drive motor, and the motor (1) and the transmission box (3) are provided with the lower connecting block (2) therebetween.

3. A rotary electric cylinder according to claim 1, characterized in that The lead screw (7) and the lead screw nut (8) are provided with a connecting block (10) therebetween, and the lead screw (7) and the lead screw nut (8) are in T-shaped thread cooperation.

4. The rotary electric cylinder according to claim 1, characterized by The thrust bearing (6) is a bidirectional thrust ball bearing.

5. The rotary electric cylinder according to claim 1, wherein The piston rod (11) is hollow and provided with a clamping groove in the inside and along the axial direction, and the other end of the lead screw (7) is movably connected with the clamping groove on the inner wall of the piston rod (11) through a pin (12).

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