Electric cylinder structure

Abstract

The utility model provides an electric cylinder structure, which belongs to the technical field of electric driving equipment and comprises a driving cavity, a transmission cavity, a driving component and a transmission component, and the driving component comprises a motor driving plate and a servo motor electrically connected with the motor driving plate; the driving cavity is communicated with the transmission cavity, the motor driving plate and the servo motor are both arranged in the driving cavity, the power output end of the servo motor is connected with one end of the transmission assembly, and the other end of the transmission assembly extends into the transmission cavity and is used for transmitting power. According to the utility model, the motor driving plate and the servo motor are arranged in the driving cavity, and the transmission assembly is arranged in the transmission cavity, so that the driving assembly and the transmission assembly are protected, and an electric cylinder is prevented from being damaged in a special environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric drive devices and relates to an electric cylinder structure. Background Art

[0002] An electric cylinder, also called a servo electric cylinder, is a modular product that integrates a servo motor and a lead screw. It converts the rotational motion of the servo motor into a linear motion, and at the same time converts the precise rotational speed control and precise torque control of the servo motor into precise speed control, precise position control or precise thrust control to achieve high-precision linear motion.

[0003] Currently, electric cylinders are widely used in various industries and have developed various structural forms. Due to the limitation of its own size, the working stroke of the electric cylinder cannot protect the electric cylinder itself when meeting the need for a large working stroke. For example, the patent document with the application number CN202322022356.2 discloses a servo electric cylinder with an internal displacement sensor. It installs a servo motor and an electric cylinder assembly above the fixed seat, resulting in the exposure of its servo motor and some transmission components, and it is impossible to effectively protect the servo motor and the transmission components. When it is used in special environments (environments with high humidity, high acidity or high dust, etc.), it is easy to be damaged. Summary of the Utility Model

[0004] In view of the technical problem described in the above background art that the electric cylinder in the prior art cannot effectively protect the servo motor and the transmission components, resulting in the problem that it is easy to be damaged when used in special environments, the utility model proposes an electric cylinder structure.

[0005] The utility model protects the drive component and the transmission component by setting a drive cavity and a transmission cavity, placing the motor drive board and the servo motor in the drive cavity, and placing the transmission component in the transmission cavity, so as to avoid damage to the electric cylinder in special environments (environments with high humidity, high acidity or high dust, etc.).

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] An electric cylinder structure of the utility model includes a drive cavity, a transmission cavity, a drive component and a transmission component. The drive component includes a motor drive board and a servo motor electrically connected to the motor drive board;

[0008] The drive cavity is communicated with the transmission cavity. The motor drive board and the servo motor are both placed in the drive cavity. The power output end of the servo motor is connected to one end of the transmission component, and the other end of the transmission component extends into the transmission cavity for transmitting power.

[0009] Further defined, the driving assembly further includes a manual driving member, the manual driving member is disposed in the driving cavity, and a power output end of the manual driving member is connected to one end of the transmission assembly.

[0010] Further defined, the manual driving member includes a hand-cranked driving gear, a hand-cranked driven gear and a hand crank. The hand-cranked driving gear and the hand-cranked driven gear are both disposed in the driving cavity; one end of the hand crank is connected to the hand-cranked driving gear, and the other end extends out of the driving cavity; the hand-cranked driving gear meshes with the hand-cranked driven gear, and the hand-cranked driven gear is connected to one end of the transmission assembly.

[0011] Further defined, the electric cylinder structure further includes a box body and a cylinder barrel fixedly connected to the box body. An inner cavity of the box body forms a driving cavity, and an inner cavity of the cylinder barrel forms a transmission cavity.

[0012] Further defined, the electric cylinder structure further includes a box cover and an end cover. A box body opening is provided on a side of the box body away from the transmission cavity, and the box cover is disposed at the box body opening; a cylinder barrel opening is provided on a side of the cylinder barrel away from the driving cavity, and the end cover is disposed at the cylinder barrel opening.

[0013] Further defined, the transmission assembly includes a lead screw, a nut, a load-bearing push rod, an upper flexible limiting member and a lower flexible limiting member. A power output end of the manual driving member and a power output end of the servo motor are both connected to one end of the lead screw, and the other end of the lead screw extends out of the transmission cavity and is slidably connected to the end cover; the lead screw is connected to the box body through a bearing; the nut is threadedly connected to the lead screw, the load-bearing push rod is fixedly connected to the nut, the upper flexible limiting member is disposed on a side of the cylinder barrel away from the end cover, and the lower flexible limiting member is disposed on a side of the cylinder barrel close to the end cover.

[0014] Further defined, the transmission assembly further includes a buffer push rod disposed between the load-bearing push rod and the cylinder barrel, and the buffer push rod is slidably connected to the cylinder barrel;

[0015] The upper flexible limiting member includes an upper circlip for hole, and the lower flexible limiting member includes a lower circlip for hole. The load-bearing push rod is connected to the buffer push rod through the lower circlip for hole; the upper circlip for hole is connected to the cylinder barrel, and the upper circlip for hole is disposed opposite to the load-bearing push rod.

[0016] Further defined, the upper flexible limiting member further includes an upper spring, and the lower flexible limiting member further includes a lower spring. The upper circlip for hole and the upper spring are both disposed on a side of the cylinder barrel away from the end cover, and the lower circlip for hole and the lower spring are both disposed on a side of the cylinder barrel close to the end cover;

[0017] One end of the buffer push rod is connected to one end of the cylinder barrel through the upper spring, and the other end of the buffer push rod is connected to the other end of the cylinder barrel through the lower spring.

[0018] Further defined, a guide groove is provided on one side of the buffer push rod close to the cylinder barrel, and a convex strip is provided on one side of the cylinder barrel close to the buffer push rod. The convex strip extends into the guide groove, so that the buffer push rod is slidably connected to the cylinder barrel.

[0019] Further defined, an exhaust hole is provided on the buffer push rod, and the exhaust hole is used for exhausting air to balance the air pressure between the buffer push rod and the cylinder barrel.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] 1. For an electric cylinder structure of the present utility model, a driving cavity and a transmission cavity are provided. The motor driving plate and the servo motor are both placed in the driving cavity, and the transmission component is placed in the transmission cavity to seal and protect the driving component and the transmission component, so as to avoid damage to the electric cylinder in special environments (such as environments with high humidity, high acidity or high dust, etc.).

[0022] 2. The present utility model protects the load-bearing push rod or the buffer push rod at the upper limit position and the lower limit position by providing an upper flexible limiting member and a lower flexible limiting member, respectively, to prevent the load-bearing push rod or the buffer push rod from directly contacting the cylinder barrel and being damaged.

[0023] 3. The present utility model is provided with an exhaust hole on the buffer push rod, and the air between the buffer push rod and the cylinder barrel is discharged through the exhaust hole to balance the air pressure between the buffer push rod and the cylinder barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the electric cylinder structure of the present utility model;

[0025] Figure 2 is Figure 1 a partial enlarged view of part A in

[0026] Figure 3 is Figure 1 a partial enlarged view of part B in

[0027] Figure 4 is a schematic diagram of the structure of the buffer push rod;

[0028] Wherein, 1 - motor driving plate, 2 - hand-cranked driving gear, 3 - hand-cranked driven gear, 4 - box cover, 5 - servo motor, 6 - box body, 7 - bearing, 8 - cylinder barrel, 9 - upper spring, 10 - buffer push rod, 101 - exhaust hole, 102 - guide groove, 11 - load-bearing push rod, 12 - lower spring, 13 - lower hole retaining ring, 14 - end cover, 15 - lead screw, 16 - nut, 17 - upper hole retaining ring, 18 - hand crank, 19 - screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part rather than all of the embodiments of the present utility model. The description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present utility model and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the protection scope of the present utility model: the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0031] Embodiment 1

[0032] In this embodiment, an electric cylinder structure includes a driving cavity, a transmission cavity, a driving component and a transmission component. The driving component includes a motor driving plate 1 and a servo motor 5 electrically connected to the motor driving plate 1.

[0033] The driving cavity communicates with the transmission cavity. The motor driving plate 1 and the servo motor 5 are both disposed in the driving cavity. The power output end of the servo motor 5 is connected to one end of the transmission component, and the other end of the transmission component extends into the transmission cavity for transmitting power.

[0034] In this embodiment, the driving component further includes a manual driving member disposed in the driving cavity. The power output end of the manual driving member is connected to one end of the transmission component. Among them, the manual driving member includes a hand-cranked driving gear 2, a hand-cranked driven gear 3 and a hand crank 18. The hand-cranked driving gear 2 and the hand-cranked driven gear 3 are both disposed in the driving cavity; one end of the hand crank 18 is connected to the hand-cranked driving gear 2, and the other end extends out of the driving cavity; the hand-cranked driving gear 2 meshes with the hand-cranked driven gear 3, and the hand-cranked driven gear 3 is connected to one end of the transmission component.

[0035] See Figure 1, specifically, the driving cavity is divided into a top cavity, a middle cavity, and a bottom cavity. The motor driving plate 1 is placed in the top cavity, the manual driving member is placed in the middle cavity, and the servo motor 5 is placed in the bottom cavity. Moreover, the center of the servo motor 5 and the center of the transmission assembly are located in the same plane.

[0036] In this embodiment, the electric cylinder structure further includes a box body 6 and a cylinder barrel 8 fixedly connected to the box body 6. The inner cavity of the box body 6 forms a driving cavity, and the inner cavity of the cylinder barrel 8 forms a transmission cavity. Among them, the outer periphery of the servo motor 5 is rotatably connected to the cylinder barrel 8 through a bearing 7. The hand-cranked driving gear 2 is fixedly connected to the box body 6. An installation hole for the hand-crank 18 to pass through is provided on the box body 6, and the hand-crank 18 can rotate circumferentially along the installation hole under manual shaking, thereby driving the hand-cranked driving gear 2 to rotate. The hand-cranked driving gear 2 drives the hand-cranked driven gear 3 to rotate, and then the hand-cranked driven gear 3 drives the transmission to rotate.

[0037] It should be noted that the electric cylinder in this embodiment has two working modes: electric and manual. Since both the hand-cranked driven gear 3 and the servo motor 5 are connected to the transmission assembly, when the hand-cranked driven gear 3 drives the transmission assembly to rotate, the servo motor 5 also rotates synchronously; when the servo motor 5 drives the transmission assembly to rotate, the hand-cranked driven gear 3 also rotates synchronously.

[0038] Preferably, the electric cylinder structure of this embodiment further includes a box cover 4 and an end cover 14. A box body opening is provided on one side of the box body 6 away from the transmission cavity, and the box cover 4 is arranged at the box body opening; a cylinder barrel opening is provided on one side of the cylinder barrel 8 away from the driving cavity, and the end cover 14 is arranged at the cylinder barrel opening. Among them, the box body 6 and the box cover 4, the cylinder barrel 8 and the end cover 14, and the box body 6 and the cylinder barrel 8 all adopt detachable connection methods such as bolts, screws, and snap connections, which is convenient for the maintenance of the electric cylinder. Among them, the installation hole can be set on the box cover 4 or on any side of the box body 6 away from the transmission cavity.

[0039] For the electric cylinder structure of this embodiment, the motor driving plate 1 and the servo motor 5 are both placed in the driving cavity, and the transmission assembly is placed in the transmission cavity, so as to seal and protect the driving assembly and the transmission assembly to prevent the electric cylinder from being damaged in special environments (such as environments with high humidity, high acidity, or large dust).

[0040] Embodiment 2

[0041] See Figure 2 and Figure 3, In this embodiment, an electric cylinder structure, based on Embodiment 1, the transmission assembly includes a lead screw 15, a nut 16, a load-carrying push rod 11, an upper flexible limit member, and a lower flexible limit member. The power output ends of the manual driving member and the servo motor 5 are both connected to one end of the lead screw 15. The other end of the lead screw 15 penetrates through the transmission cavity and extends out of the transmission cavity and is slidably connected to the end cover 14; the lead screw 15 is connected to the box body 6 through a bearing 7; the nut 16 is threadedly connected to the lead screw 15, the load-carrying push rod 11 is fixedly connected to the nut 16, the upper flexible limit member is arranged on one side of the cylinder barrel 8 away from the end cover 14, and the lower flexible limit member is arranged on one side of the cylinder barrel 8 close to the end cover 14.

[0042] Preferably, in this embodiment, the electric cylinder structure further includes a fastening connection member for connecting the load-carrying push rod 11 and the nut 16. The fastening connection member can be a detachable structure such as a screw, a screw 19, a pin, etc., which is convenient for the disassembly and installation between the load-carrying push rod 11 and the nut 16. Among them, the lead screw 15 and the servo motor 5 are connected by a key connection.

[0043] In this embodiment, the transmission assembly further includes a buffer push rod 10 arranged between the load-carrying push rod 11 and the cylinder barrel 8. The buffer push rod 10 is slidably connected to the cylinder barrel 8; the upper flexible limit member includes an upper hole retaining ring 17, and the lower flexible limit member includes a lower hole retaining ring 13. The load-carrying push rod 11 is connected to the buffer push rod 10 through the lower hole retaining ring 13; the upper hole retaining ring 17 is connected to the cylinder barrel 8, and the upper hole retaining ring 17 is arranged opposite to the load-carrying push rod 11. Preferably, the upper hole retaining ring 17 is arranged on the side close to the fastening connection member.

[0044] In this embodiment, the upper flexible limit member further includes an upper spring 9, and the lower flexible limit member further includes a lower spring 12. The upper hole retaining ring 17 and the upper spring 9 are both arranged on one side of the cylinder barrel 8 away from the end cover 14, and the lower hole retaining ring 13 and the lower spring 12 are both arranged on one side of the cylinder barrel 8 close to the end cover 14; one end of the buffer push rod 10 is connected to one end of the cylinder barrel 8 through the upper spring 9, and the other end of the buffer push rod 10 is connected to the other end of the cylinder barrel 8 through the lower spring 12.

[0045] In this embodiment, a guide groove 102 is arranged on one side of the buffer push rod 10 close to the cylinder barrel 8, and a convex strip is arranged on one side of the cylinder barrel 8 close to the buffer push rod 10. The convex strip extends into the guide groove 102, so that the buffer push rod 10 is slidably connected to the cylinder barrel 8. Preferably, the setting positions of the convex strip and the guide groove 102 correspond to prevent the rotational friction between the buffer push rod 10 and the cylinder barrel 8, thereby improving the transmission efficiency.

[0046] In this embodiment, an exhaust hole 101 is arranged on the buffer push rod 10. The exhaust hole 101 is used for exhausting air to balance the air pressure between the buffer push rod 10 and the cylinder barrel 8. Preferably, referring to Figure 4 , the exhaust hole 101 is arranged on the side close to the driving cavity.

[0047] Preferably, the buffer push rod 10 and the bearing push rod 11 in this embodiment are both cylindrical structures with shapes matching that of the cylinder barrel 8.

[0048] It should be noted that the motor drive board 1 in the present utility model is a commercially available product, with the model: KTS-80A, and the manufacturer: Shanghai Mutian Electromechanical Equipment Co., Ltd. It belongs to the technology well-known to those skilled in the art. The present utility model only relates to the improvement of the electric cylinder structure and does not involve the improvement of the control program.

[0049] For an electric cylinder structure of the present utility model, its working process is as follows: The motor drive board 1 drives the servo motor to drive the lead screw 15 to rotate. The nut 16 makes a linear motion along the lead screw 15 under the rotation of the lead screw 15, that is, converts the rotational motion of the servo motor 5 into a linear motion. When the nut 16 moves to the rear end of the lead screw 15, the buffer push rod 10 contacts the lower orifice retaining ring 13. After the contact, the buffer push rod 10 is driven to move backward (the side away from the servo motor 5) through the lower orifice retaining ring 13 until it pauses at the electrical limit point (the servo motor 5 is powered off). During this process, if a failure occurs at the electrical limit point, the buffer push rod 10 continues to move backward until the lower spring 12 reaches the designed compression value and can no longer move backward. After the motor drive board 1 alarms, the servo motor 5 is powered off and stops operating; similarly, when running in the reverse direction, when the nut 16 moves to the front end of the lead screw 15, the fastening connecting piece contacts the upper orifice retaining ring 17. After the contact, the buffer push rod 10 is driven to move forward until it pauses at the electrical limit point (the servo motor 5 is powered off). During this process, if a failure occurs at the electrical limit point, the buffer push rod 10 continues to move forward until the upper spring 9 reaches the designed compression value and can no longer move forward. After the motor drive board 1 alarms, the servo motor 5 is powered off and stops operating.

[0050] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An electric cylinder structure, characterized in that, It includes a driving cavity, a transmission cavity, a driving component and a transmission component. The driving component includes a motor driving plate (1) and a servo motor (5) electrically connected to the motor driving plate (1). The driving cavity is communicated with the transmission cavity. The motor driving plate (1) and the servo motor (5) are both placed in the driving cavity. The power output end of the servo motor (5) is connected to one end of the transmission component, and the other end of the transmission component extends into the transmission cavity for transmitting power.

2. The electric cylinder structure according to claim 1, wherein The driving component further includes a manual driving member which is placed in the driving cavity, and the power output end of the manual driving member is connected to one end of the transmission component.

3. The electric cylinder structure according to claim 2, characterized in that The manual driving member includes a hand-cranked driving gear (2), a hand-cranked driven gear (3) and a hand crank (18). The hand-cranked driving gear (2) and the hand-cranked driven gear (3) are both placed in the driving cavity. One end of the hand crank (18) is connected to the hand-cranked driving gear (2), and the other end extends out of the driving cavity. The hand-cranked driving gear (2) meshes with the hand-cranked driven gear (3), and the hand-cranked driven gear (3) is connected to one end of the transmission component.

4. The electric cylinder structure according to claim 2, characterized in that, The electric cylinder structure further includes a box body (6) and a cylinder barrel (8) fixedly connected to the box body (6). The inner cavity of the box body (6) forms the driving cavity, and the inner cavity of the cylinder barrel (8) forms the transmission cavity.

5. The electric cylinder structure according to claim 4, characterized in that, The electric cylinder structure further includes a box cover (4) and an end cover (14). There is a box body opening on one side of the box body (6) away from the transmission cavity, and the box cover (4) is arranged at the box body opening. There is a cylinder barrel opening on one side of the cylinder barrel (8) away from the driving cavity, and the end cover (14) is arranged at the cylinder barrel opening.

6. The electric cylinder structure according to claim 5, wherein The transmission component includes a lead screw (15), a nut (16), a load-bearing push rod (11), an upper flexible limiting member and a lower flexible limiting member. The power output ends of the manual driving member and the servo motor (5) are both connected to one end of the lead screw (15). The other end of the lead screw (15) extends out of the transmission cavity and is slidably connected to the end cover (14). The lead screw (15) is connected to the box body (6) through a bearing (7). The nut (16) is threadedly connected to the lead screw (15), the load-bearing push rod (11) is fixedly connected to the nut (16), the upper flexible limiting member is arranged on one side of the cylinder barrel (8) away from the end cover (14), and the lower flexible limiting member is arranged on one side of the cylinder barrel (8) close to the end cover (14).

7. The electric cylinder structure according to claim 6, characterized in that, The transmission component further includes a buffer push rod (10) arranged between the load-bearing push rod (11) and the cylinder barrel (8), and the buffer push rod (10) is slidably connected to the cylinder barrel (8). The upper flexible limiting member includes an upper hole retaining ring (17), and the lower flexible limiting member includes a lower hole retaining ring (13). The load-bearing push rod (11) is connected to the buffer push rod (10) through the lower hole retaining ring (13). The upper hole retaining ring (17) is connected to the cylinder barrel (8), and the upper hole retaining ring (17) is arranged opposite to the load-bearing push rod (11).

8. The electric cylinder structure according to claim 7, characterized in that, The upper flexible limit member further includes an upper spring (9), and the lower flexible limit member further includes a lower spring (12). The upper orifice snap ring (17) and the upper spring (9) are both arranged on the side of the cylinder barrel (8) far from the end cover (14), and the lower orifice snap ring (13) and the lower spring (12) are both arranged on the side of the cylinder barrel (8) close to the end cover (14); One end of the buffer push rod (10) is connected to one end of the cylinder barrel (8) through the upper spring (9), and the other end of the buffer push rod (10) is connected to the other end of the cylinder barrel (8) through the lower spring (12).

9. The electric cylinder structure according to claim 8, characterized in that, A guide groove (102) is arranged on the side of the buffer push rod (10) close to the cylinder barrel (8), and a rib is arranged on the side of the cylinder barrel (8) close to the buffer push rod (10). The rib extends into the guide groove (102) so that the buffer push rod (10) is slidably connected to the cylinder barrel (8).

10. The electric cylinder structure according to claim 8, characterized in that, An exhaust hole (101) is arranged on the buffer push rod (10), and the exhaust hole (101) is used for exhausting air to balance the air pressure between the buffer push rod (10) and the cylinder barrel (8).

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