Compact electric cylinder

Abstract

The utility model discloses a compact electric cylinder which comprises a box body and a box cover, and the box body and the box cover are connected to form a containing space. The motor is installed in the containing space, a first vibration reduction part is arranged at the front end of the motor, and a second vibration reduction part is arranged at the rear end of the motor; the lead screw assembly is installed in the containing space, and the lead screw assembly is connected with the motor through a gear assembly; the piston is connected with the lead screw assembly, the rear end of the piston extends out of the containing space, and the rear end of the piston is connected with a piston rod. By arranging the silica gel pad and the rubber block at the front end and the rear end of the motor respectively, on one hand, the vibration reduction effect of the motor can be improved, and axial movement of the motor caused by vibration can be prevented; and on the other hand, the silica gel pad and the rubber block are adopted as vibration reduction components, the overall size of the electric cylinder is reduced, and the structure of the electric cylinder is more compact.

Description

Technical Field

[0001] The utility model relates to the technical field of driving devices, and particularly relates to a compact electric cylinder. Background Art

[0002] With the increasing requirements for factory automation, the application of electric cylinders is becoming more and more extensive. An electric cylinder can convert the rotation of a motor into linear motion. Compared with other driving devices using hydraulic or pneumatic pressure as the driving source, the electric cylinder is directly controlled by a motor and does not require intermediate media such as oil and gas to transmit power, thus avoiding system errors caused by oil leakage and air leakage, resulting in inaccuracy and inconvenience in use.

[0003] In the agricultural automation industry (such as a grain harvester), the output force requirement for the electric cylinder is not high, but due to the relatively harsh application environment, the reliability requirement for the electric cylinder is relatively high. For example, when the grain harvester is working, the vibration is relatively obvious. If the vibration damping effect of the electric cylinder is not good, it will cause the positions of the internal components of the electric cylinder to shift, and further cause equipment failure. In addition, the agricultural automation industry also has relatively high requirements for the size of the electric cylinder, and small-sized electric cylinders have a wider range of applications. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: how to improve the reliability and structural compactness of the electric cylinder.

[0005] To this end, the utility model provides a compact electric cylinder, which can improve the reliability, durability and structural compactness of the electric cylinder through structural improvement.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a compact electric cylinder, comprising:

[0007] A box body and a box cover, the box body is connected with the box cover to form an accommodating space;

[0008] A motor, the motor is installed in the accommodating space, a first vibration damping member is arranged at the front end of the motor, and a second vibration damping member is arranged at the rear end of the motor;

[0009] A lead screw assembly, the lead screw assembly is installed in the accommodating space, and the lead screw assembly is connected with the motor through a gear assembly;

[0010] A piston, the piston is connected with the lead screw assembly, the rear end of the piston extends out of the accommodating space, and a piston rod is connected to the rear end of the piston.

[0011] Further, the first vibration damping member is a silica gel pad, and the second vibration damping member is a rubber block.

[0012] Further, first card slots are provided in both the box body and the box cover, second card slots are provided in both the box body and the box cover, and the silica gel pad is located in the first card slot.

[0013] Further, the silica gel pad is fixedly connected to the front end of the motor by screws, and the heads of the screws are located in the second card slot.

[0014] Further, a groove is provided in the box body, a butting block is provided in the box cover, the position of the butting block corresponds to the position of the groove, the rubber block is located in the groove, and the butting block is used to limit the up-and-down movement of the rubber block.

[0015] Further, the lead screw assembly includes:

[0016] A lead screw, on which a first gear is sleeved, a cylindrical pin is provided on the lead screw, the cylindrical pin is perpendicular to the axis of the lead screw, and one end face of the first gear is clamped with the cylindrical pin;

[0017] A nut, which is in threaded connection with the lead screw and is connected to the piston.

[0018] Further, the front end of the lead screw is connected with a bearing, and a silica gel column is embedded on the box body, and the silica gel column is used to reduce the radial vibration of the bearing.

[0019] Further, the front end of the lead screw is connected with a hand-cranking component, and the hand-cranking component is located outside the accommodation space.

[0020] Further, a magnet is provided on the nut, a circuit board is provided on the bottom plate of the box body, and a sensor is provided on the circuit board.

[0021] Further, first mounting grooves are formed on the side walls of both the box body and the box cover, and the first mounting grooves are used for mounting sealing elements.

[0022] Further, a spacer sleeve is sleeved on the lead screw, and two ends of the spacer sleeve are respectively abutted against the bearing and the first gear.

[0023] Further, both the box body and the box cover are provided with second mounting grooves for mounting guide rings.

[0024] The beneficial effects of the present utility model are as follows.

[0025] The compact electric cylinder of the present utility model is provided with a first damping member and a second damping member at the front end and the rear end of the motor respectively, which can not only improve the damping effect of the motor, but also prevent the axial movement of the motor caused by vibration; it is also beneficial to reduce the overall volume of the electric cylinder and make the structure of the electric cylinder more compact. The silica gel pad is snapped into the first card slot, and the head of the screw is snapped into the second card slot. The silica gel pad is connected to the motor through the screw, which can not only improve the damping effect, but also prevent the motor from rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present utility model will be further described below with reference to the drawings and embodiments.

[0027] Figure 1 is a top view of the compact electric cylinder (hiding the box cover) of the present utility model.

[0028] Figure 2 is the present utility model Figure 1 a cross-sectional view taken along line N-N in.

[0029] Figure 3 is the present utility model Figure 1 a cross-sectional view taken along line M-M in.

[0030] Figure 4 is a schematic structural view of the box body of the present utility model.

[0031] Figure 5 is a schematic structural view of the motor of the present utility model.

[0032] Figure 6 is a schematic structural view of the box cover of the present utility model.

[0033] Figure 7 is a schematic structural view of the lead screw assembly of the present utility model.

[0034] Figure 8 is a schematic structural view of the silica gel pad of the present utility model.

[0035] Figure 9 is a schematic structural view of the rubber block of the present utility model.

[0036] In the figure: 1. Box body; 2. Box cover; 3. Motor; 4. Silica gel pad; 5. Rubber block; 6. Lead screw assembly; 7. Gear assembly; 8. Piston; 9. Piston rod; 10. Screw; 11. Bearing; 12. Silica gel column; 13. First installation groove; 14. Sealing member; 15. Sleeve; 16. Guide ring; 17. Second installation groove; 18. Hand-cranking component; 101. First card slot; 102. Second card slot; 103. Groove; 104. Circuit board; 201. Abutting block; 601. Lead screw; 602. First gear; 603. Cylindrical pin; 604. Nut; 6041. Magnet; 6042. Spacer. Detailed implementation mode

[0037] The present utility model will be further described in detail below with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only showing the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0038] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0039] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0040] As Figures 1 to 9 shown, the compact electric cylinder of the present utility model includes: a box body 1, a box cover 2, a motor 3, a lead screw assembly 6, and a piston 8. The box body 1 is connected to the box cover 2 to form an accommodation space. The motor 3 is installed in the accommodation space. A first damping member (such as a silica gel pad 4) is provided at the front end of the motor 3, and a second damping member (such as a rubber block 5) is provided at the rear end of the motor 3. The lead screw assembly 6 is installed in the accommodation space. The lead screw assembly 6 is connected to the motor 3 through a gear assembly 7. The piston 8 is connected to the lead screw assembly 6. The rear end of the piston 8 extends out of the accommodation space, and a piston rod 9 is connected to the rear end of the piston 8. When the motor 3 is started, the lead screw assembly 6 is driven to move through the gear assembly 7, and the piston 8 and the piston rod 9 are driven to perform linear telescopic movement through the lead screw assembly 6.

[0041] In this utility model, a first damping member and a second damping member are respectively arranged at the front end and the rear end of the motor 3. On the one hand, it can not only improve the damping effect of the motor 3, but also prevent the axial movement of the motor 3 caused by vibration. On the other hand, it is beneficial to reduce the overall volume of the electric cylinder and make the structure of the electric cylinder more compact. The first damping member and the second damping member respectively adopt a silica gel pad 4 and a rubber block 5, which can further improve the structural compactness of the electric cylinder.

[0042] Specifically, a first card slot 101 is provided in both the box body 1 and the box cover 2, and a second card slot 102 is provided in both the box body 1 and the box cover 2. The silica gel pad 4 is located in the first card slot 101. The silica gel pad 4 is fixedly connected to the front end of the motor 3 by screws 10, and the heads of the screws 10 are located in the second card slot 102. The number of the silica gel pads 4 is two. The silica gel pad 4 is, for example, quadrilateral. The side of the silica gel pad 4 close to the output shaft of the motor 3 is arc-shaped, which is convenient for mating with the stop of the motor 3, and the other three sides are straight. For example, the first card slot 101 is square, which matches the shapes of the other three sides of the silica gel pad 4, and the thickness of the first card slot 101 matches the thickness of the silica gel pad 4. The second card slot 102 is, for example, U-shaped. The opening of the second card slot 102 is convenient for the heads of the screws 10 to be inserted into the second card slot 102, and the arc-shaped bottom surface of the second card slot 102 matches the shape of the heads of the screws 10, which can limit the screws 10.

[0043] During installation, first fix the silica gel pad 4 to the front end face of the motor 3 with the screws 10. The two silica gel pads 4 are symmetrically arranged at 180°. Then install the assembled motor 3 into the accommodating space. At this time, the silica gel pad 4 is inserted into the first card slot 101, and the heads of the screws 10 are inserted into the second card slot 102. With such a design of this utility model, in addition to improving the damping effect, it can also prevent the motor 3 from rotating self. The two screws 10 are respectively stuck in the upper and lower second card slots 102, which can prevent the motor 3 from rotating circumferentially by itself.

[0044] Specifically, a groove 103 is provided in the box body 1, and an abutting block 201 is provided in the box cover 2. The position of the abutting block 201 corresponds to the position of the groove 103. The rubber block 5 is located in the groove 103, and the abutting block 201 is used to limit the up-and-down movement of the rubber block 5. For example, the rubber block 5 is composed of two cuboids with different sizes. The large cuboid is installed in the groove 103, and the size of the large cuboid matches the installation space size of the groove 103, which can prevent the rubber block 5 from moving left and right in the groove 103. The small cuboid is connected to the rear end face of the motor 3 (it can be connected by bonding or other means), and a part of the small cuboid is located outside the groove 103. The overall length of the rubber block 5 is slightly greater than the distance between the rear end face of the motor 3 and the rear wall of the box body 1. In this way, when the motor 3 is installed in the accommodation space, the rubber block 5 will be slightly squeezed, which can generate a certain axial force on the motor 3 to prevent the motor 3 from axially moving due to vibration. The abutting block 201 abuts against the large cuboid of the rubber block 5 from above to prevent the rubber block 5 from moving up and down due to vibration.

[0045] Specifically, the lead screw assembly 6 includes a lead screw 601 and a nut 604. A first gear 602 is sleeved on the lead screw 601. A cylindrical pin 603 is provided on the lead screw 601. The cylindrical pin 603 is perpendicular to the axis of the lead screw 601. One end face of the first gear 602 is clamped with the cylindrical pin 603. The nut 604 is threadedly connected to the lead screw 601, and the nut 604 is connected to the piston 8. The first gear 602 meshes with the gear assembly 7. The first gear 602 is clamped with the cylindrical pin 603 to achieve relative fixation with the lead screw 601. The first gear 602 can drive the lead screw 601 to rotate. When the lead screw 601 rotates, the linear movement of the nut 604 can be realized through the thread. The cylindrical pin 603 can not only be used as a power transmission component of the first gear 602 but also play a role in axially limiting the first gear 602, killing two birds with one stone.

[0046] For example, a bearing 11 is connected to the front end of the lead screw 601. A silica gel column 12 is embedded in the box body 1. The silica gel column 12 is used to reduce the radial vibration of the bearing 11. A spacer sleeve 15 is sleeved on the lead screw 601. The two ends of the spacer sleeve 15 respectively abut against the bearing 11 and the first gear 602. The spacer sleeve 15 is used to axially limit the bearing 11 and the first gear 602. A hand-cranking component 18 is connected to the front end of the lead screw 601. The hand-cranking component 18 is located outside the accommodation space. The preloading of the bearing 11 can be achieved through the hand-cranking component 18. In addition, when the motor 3 suddenly loses power, the hand-cranking component 18 can also be used as a manual power source to directly control the rotation of the lead screw 601.

[0047] Specifically, a magnet 6041 is provided on the nut 604, a circuit board 104 is provided on the bottom plate of the box body 1, and a sensor is provided on the circuit board 104. A silica gel sheet is padded under the circuit board 104, which can prevent external dust and water vapor from infiltrating into the accommodation space and prevent the circuit board 104 from failing. When the nut 604 moves, the magnet 6041 will move together with the nut 604, and the magnetic field generated by the magnet 6041 can be sensed by the sensor and generate a signal to feedback to the host computer. The host computer can demodulate the position of the nut 604 according to the signal feedback by the sensor, so as to monitor the moving stroke of the piston rod 9.

[0048] Specifically, first installation grooves 13 are formed on the side walls of the box body 1 and the box cover 2, and the first installation grooves 13 are used for installing the sealing member 14. The sealing member 14 can play a role in dust prevention and waterproofing. The box body 1 and the box cover 2 are both provided with second installation grooves 17 for installing the guide ring 16. The piston 8 penetrates through the guide ring 16, and the guide ring 16 can be used as a supporting member and an axial guiding member of the piston 8. A gasket 6042 is further provided at the front end of the nut 604, and the gasket 6042, the nut 604 and the piston 8 are fixed by fastening screws.

[0049] To sum up, the compact electric cylinder of the present utility model has at least the following advantages through structural improvement:

[0050] (1) By respectively arranging the silica gel pad 4 and the rubber block 5 at the front end and the rear end of the motor 3, on the one hand, it can not only improve the vibration damping effect of the motor 3, but also prevent the axial movement of the motor 3 caused by vibration; on the other hand, using the silica gel pad 4 and the rubber block 5 as vibration damping components is beneficial to reducing the overall volume of the electric cylinder and making the structure of the electric cylinder more compact.

[0051] (2) The silica gel pad 4 is snapped into the first card slot 101, and the head of the screw 10 is snapped into the second card slot 102. The silica gel pad 4 is connected to the motor 3 through the screw 10. In addition to improving the vibration damping effect, it can also prevent the motor 3 from rotating.

[0052] (3) The first gear 602 is matched with the cylindrical pin 603 on the lead screw 601. The cylindrical pin 603 can not only be used as a power transmission component of the first gear 602, but also play a role in axially limiting the first gear 602, killing two birds with one stone.

[0053] Inspired by the ideal embodiment of the present utility model described above, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A compact electric cylinder, characterized in that, Comprising: A box body (1) and a box cover (2), the box body (1) is connected to the box cover (2) to form an accommodation space; A motor (3), the motor (3) is installed in the accommodation space, a first damping member is provided at the front end of the motor (3), and a second damping member is provided at the rear end of the motor (3); A lead screw assembly (6), the lead screw assembly (6) is installed in the accommodation space, and the lead screw assembly (6) is connected to the motor (3) through a gear assembly (7); A piston (8), the piston (8) is connected to the lead screw assembly (6), the rear end of the piston (8) extends out of the accommodation space, and a piston rod (9) is connected to the rear end of the piston (8).

2. The compact electric cylinder according to claim 1, wherein, The first damping member is a silica gel pad (4), and the second damping member is a rubber block (5).

3. The compact electric cylinder according to claim 2, wherein First card slots (101) are provided in both the box body (1) and the box cover (2), second card slots (102) are provided in both the box body (1) and the box cover (2), and the silica gel pad (4) is located in the first card slot (101).

4. The compact electric cylinder according to claim 3, characterized in that, The silica gel pad (4) is fixedly connected to the front end of the motor (3) by screws (10), and the heads of the screws (10) are located in the second card slots (102).

5. The compact electric cylinder according to claim 2, characterized in that, A groove (103) is provided in the box body (1), a butting block (201) is provided in the box cover (2), the position of the butting block (201) corresponds to the position of the groove (103), the rubber block (5) is located in the groove (103), and the butting block (201) is used to limit the up and down movement of the rubber block (5).

6. The compact electric cylinder according to claim 1, characterized in that, The lead screw assembly (6) includes: A lead screw (601), a first gear (602) is sleeved on the lead screw (601), a cylindrical pin (603) is provided on the lead screw (601), the cylindrical pin (603) is perpendicular to the axis of the lead screw (601), and one end face of the first gear (602) is clamped with the cylindrical pin (603); A nut (604), the nut (604) is threadedly connected to the lead screw (601), and the nut (604) is connected to the piston (8).

7. The compact electric cylinder according to claim 6, characterized in that, The front end of the lead screw (601) is connected to a bearing (11), and a silica gel column (12) is embedded in the box body (1), and the silica gel column (12) is used to reduce the radial vibration of the bearing (11).

8. The compact electric cylinder according to claim 6, characterized in that, The front end of the lead screw (601) is connected to a hand-cranking component (18), and the hand-cranking component (18) is located outside the accommodation space.

9. The compact electric cylinder according to claim 6, wherein, A magnet (6041) is provided on the nut (604), a circuit board (104) is provided on the bottom plate of the box body (1), and a sensor is provided on the circuit board (104).

10. The compact electric cylinder according to claim 1, characterized in that, First mounting grooves (13) are provided on the side walls of both the box body (1) and the box cover (2), and the first mounting grooves (13) are used to mount a seal (14).

11. The compact electric cylinder according to claim 7, characterized in that, A spacer sleeve (15) is sleeved on the lead screw (601), and both ends of the spacer sleeve (15) are abutted against the bearing (11) and the first gear (602) respectively.

12. The compact electric cylinder according to claim 1, characterized in that, Both the box body (1) and the box cover (2) are provided with second mounting grooves (17) for mounting a guide ring (16).

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