Pneumatic straight stroke execution device with two synchronous ends

Abstract

The utility model discloses a double-end synchronous pneumatic straight stroke execution device which comprises a first screw and a second screw which are arranged side by side, one end of the first screw is connected with a pneumatic motor, a first nut seat is sleeved outside the first screw in a threaded mode, and a first execution portion is arranged at one end of the first nut seat. A second nut seat sleeves the outer part of the second screw rod in a threaded manner, and a second execution part is arranged at one end of the second nut seat; a synchronous gear set is arranged between the first screw and the second screw in a meshed mode, and the synchronous gear set transmits the rotating speed of the first screw to the second screw after changing the rotating speed of the first screw at a reduction ratio. According to the double-end synchronous linear feeding mechanism, the same-speed or differential-speed linear feeding execution action can be synchronously carried out at the two ends.

Description

Technical Field

[0001] The utility model belongs to the technical field of double-end linear actuators, and relates to a pneumatic direct stroke actuator with double-end synchronization. Background Art

[0002] The linear actuator is one of the commonly used actuating mechanisms. It usually drives the actuator to move linearly through a linear feeding device, such as a linear cylinder or a linear screw feeding structure. In order to achieve multi-point linear actuation simultaneously, a double-end direct stroke actuator is disclosed in the prior art, that is, it includes two actuator ends with linear feeding for synchronous action. However, the existing double-end direct stroke actuator can only ensure synchronous and same-speed linear stroke feeding of the two linear feeding actuator ends, and cannot achieve synchronous differential linear stroke feeding of the two linear feeding actuator ends. However, in actual use, it is often necessary for the two linear feeding actuator ends to perform linear stroke actions at different speeds, which is a technical problem that the existing double-end direct stroke actuator cannot solve.

[0003] Therefore, in view of the above technical problems existing in the existing double-end direct stroke actuator, the utility model discloses a pneumatic direct stroke actuator with double-end synchronization. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pneumatic direct stroke actuator with double-end synchronization, which can achieve synchronous double-end linear feeding actuation with the same speed or different speeds.

[0005] The utility model is realized by the following technical solutions:

[0006] A pneumatic direct stroke actuator with double-end synchronization includes a first screw rod and a second screw rod arranged side by side. One end of the first screw rod is connected with a pneumatic motor. A first nut seat is sleeved on the external thread of the first screw rod, and a first actuator is arranged at one end of the first nut seat; a second nut seat is sleeved on the external thread of the second screw rod, and a second actuator is arranged at one end of the second nut seat; a synchronous gear set is meshed between the first screw rod and the second screw rod, and the synchronous gear set transmits the rotation speed of the first screw rod to the second screw rod after decelerating at a reduction ratio.

[0007] The pneumatic motor drives the first screw rod to rotate. Through the threaded connection and cooperation structure between the first screw rod and the first nut seat, the first nut seat is driven to drive the first actuator to perform linear movement. At the same time, when the first screw rod rotates, the second screw rod can be driven to rotate synchronously through the synchronous gear set. Furthermore, through the threaded connection and cooperation structure between the second screw rod and the second nut seat, the second nut seat is driven to perform linear movement, and finally the first actuator and the second actuator synchronously perform double-end straight-stroke execution operations. Moreover, by changing the reduction ratio between the first screw rod and the second screw rod through the synchronous gear set, the rotation speeds of the first screw rod and the second screw rod are different, ensuring that the first actuator and the second actuator can perform straight-stroke execution operations at different speeds.

[0008] In order to better implement the present utility model, further, the synchronous gear set includes a first gear set sleeved outside the first screw rod and a second gear set sleeved outside the second screw rod, and the first gear set and the second gear set can be meshed and connected with different transmission ratios.

[0009] In order to better implement the present utility model, further, the first gear set includes a first rotating shaft, a gear A, and a gear B. One end of the first rotating shaft is in transmission connection with the first screw rod, and the other end of the first rotating shaft is in transmission connection with the output shaft of the pneumatic motor; the gear A and the gear B are sequentially sleeved outside the first rotating shaft, the gear A is meshed and connected with the second gear set with a first transmission ratio, and the gear B is meshed and connected with the second gear set with a second transmission ratio.

[0010] In order to better implement the present utility model, further, the second gear set includes a second rotating shaft, a gear C, a gear D, a gear E, and an axial support. The second rotating shaft is slidably arranged on the axial support, and the gear C, the gear D, and the gear E are sequentially sleeved outside the second rotating shaft. The gear C is meshed and connected with the gear A with a first transmission ratio, the gear D is meshed and connected with the gear B with a second transmission ratio, and the gear E is slidably meshed and connected with one end of the second screw rod.

[0011] In order to better implement the present utility model, further, an axial pushing device is arranged at one end of the second rotating shaft away from the second screw rod, and the pushing end of the axial pushing device is connected to one end of the second rotating shaft away from the second screw rod to drive the second rotating shaft to move axially.

[0012] In order to better implement the present utility model, further, the axial pushing device includes a pneumatic cylinder, and the end of the push rod of the pneumatic cylinder is connected to one end of the second rotating shaft away from the second screw rod.

[0013] In order to better implement the present utility model, further, a gear F is sleeved at one end of the second screw rod, and the gear F is slidably meshed and connected with the gear E.

[0014] In order to better implement the present utility model, further, it further includes a support box body, and a first linear sliding groove and a second linear sliding groove are arranged on the inner wall of the support box body. The first linear sliding groove is slidably and cooperatively connected with one side of the first nut seat, and the second linear sliding groove is slidably and cooperatively connected with one side of the second nut seat.

[0015] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0016] In the present utility model, the first screw rod and the second screw rod are arranged side by side, the first screw rod and the second screw rod are meshed and connected through a synchronous gear set, the first screw rod is driven to rotate by a pneumatic motor, and then the second screw rod is driven to rotate synchronously through the transmission of the synchronous gear set, so as to drive the first actuator on the first nut seat and the second actuator on the second nut seat to perform synchronous linear feeding; at the same time, by adjusting the transmission ratio of the synchronous gear set, the first actuator and the second actuator can perform linear feeding at the same speed or differential speed, and further realize double-end synchronous and same-speed or synchronous differential linear feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a pneumatic direct-stroke actuator for double-end synchronization;

[0018] Figure 2 It is a schematic diagram of the meshing connection between gear A and gear C;

[0019] Figure 3 It is a schematic diagram of the meshing connection between gear B and gear D.

[0020] Wherein: 1 - first screw rod; 2 - second screw rod; 3 - pneumatic motor; 4 - synchronous gear set; 5 - support box body; 6 - F gear; 7 - axial pushing device; 10 - first nut seat; 20 - second nut seat; 101 - first actuator; 201 - second actuator; 41 - first gear set; 42 - second gear set; 411 - first rotating shaft; 412 - gear A; 413 - gear B; 421 - second rotating shaft; 422 - gear C; 423 - gear D; 424 - gear E; 425 - shaft support; 100 - first linear sliding groove; 200 - second linear sliding groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following detailed descriptions are all illustrative and are intended to provide further descriptions of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly specified in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] For the convenience of description, if the words "up", "down", "left" and "right" appear in this utility model, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the utility model.

[0024] Explanation of terms: The terms "install", "connect", "connect", "fix" and so on in this utility model should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection, a direct connection or an indirect connection through an intermediate medium, an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0025] Example 1:

[0026] A double-ended synchronous pneumatic linear actuator of this embodiment, such as Figure 1 As shown, it includes a first screw 1 and a second screw 2 arranged side by side, one end of the first screw 1 is connected to a pneumatic motor 3, the external thread of the first screw 1 is provided with a first nut seat 10, and one end of the first nut seat 10 is provided with a first actuator 101; the external thread of the second screw 2 is provided with a second nut seat 20, and one end of the second nut seat 20 is provided with a second actuator 201; a synchronous gear set 4 is meshed between the first screw 1 and the second screw 2, and the synchronous gear set 4 transmits the rotational speed of the first screw 1 to the second screw 2 after changing the speed at a reduction ratio.

[0027] The output shaft of the pneumatic motor 3 is connected to one end of the first screw 1 through a coupling. The first screw 1 is supported by a bearing seat. The external threaded sleeve of the first screw 1 is provided with a first nut seat 10. The pneumatic motor 3 drives the first screw 1 to rotate, and then drives the first nut seat 10 to move linearly along the axial direction of the first screw 1, and finally drives the first actuator 101 to move linearly.

[0028] When the first screw rod 1 rotates, the second screw rod 2 can be synchronously driven to rotate through the synchronous gear set 4. By adjusting the transmission ratio of the synchronous gear set 4, the rotation speed ratio between the first screw rod 1 and the second screw rod 2 can be adjusted. The rotation of the second screw rod 2 drives the second nut seat 20 to move linearly, and finally drives the second actuator 201 to move linearly. When the transmission ratios between the first screw rod 1 and the second screw rod 2 are the same, the linear moving speeds of the first actuator 101 and the second actuator 201 are the same.

[0029] Embodiment 2:

[0030] A pneumatic direct-stroke actuator with double-end synchronization, improved on the basis of Embodiment 1, as Figure 2 and Figure 3 shown, the synchronous gear set 4 includes a first gear set 41 sleeved outside the first screw rod 1 and a second gear set 42 sleeved outside the second screw rod 2. The first gear set 41 and the second gear set 42 can be meshed and connected with different transmission ratios.

[0031] The first gear set 41 and the second gear set 42 can be meshed with a transmission ratio of 1:1 or 1:2 - 1:4, so as to adjust the rotation speeds of the first screw rod 1 and the second screw rod 2 to be the same or different, and further adjust the linear moving speeds of the first actuator 101 and the second actuator 201 to be the same or different.

[0032] Other parts of this embodiment are the same as those of Embodiment 1, so they will not be elaborated here.

[0033] Embodiment 3:

[0034] A pneumatic direct-stroke actuator with double-end synchronization, improved on the basis of Embodiment 1 or 2, as Figure 2 and Figure 3As shown in the figure, the first gear set 41 includes a first rotating shaft 411, a gear A 412, and a gear B 413. One end of the first rotating shaft 411 is in driving connection with the first screw rod 1, and the other end of the first rotating shaft 411 is in driving connection with the output shaft of the pneumatic motor 3. The gear A 412 and the gear B 413 are sequentially sleeved on the outside of the first rotating shaft 411. The gear A 412 is meshed and connected with the second gear set 42 at a first transmission ratio, and the gear B 413 is meshed and connected with the second gear set 42 at a second transmission ratio. The second gear set 42 includes a second rotating shaft 421, a gear C 422, a gear D 423, a gear E 424, and a shaft support 425. The second rotating shaft 421 is slidably arranged on the shaft support 425. The gear C 422, the gear D 423, and the gear E 424 are sequentially sleeved on the outside of the second rotating shaft 421. The gear C 422 is meshed and connected with the gear A 412 at a first transmission ratio, the gear D 423 is meshed and connected with the gear B 413 at a second transmission ratio, and the gear E 424 is slidably meshed with one end of the second screw rod 2, and the meshing transmission between the gear E 424 and one end of the second screw rod 2 is 1:1.

[0035] When the gear C 422 is meshed and connected with the gear A 412 at a first transmission ratio, that is, when the gear C 422 is meshed with the gear A 412 at a transmission ratio of 1:1, the rotation speeds of the first screw rod 1 and the second screw rod 2 are the same at this time, so that the linear moving speeds of the first actuator 101 and the second actuator 201 are the same. It should be noted that the structures of the first screw rod 1 and the second screw rod 2 are completely the same.

[0036] When the gear D 423 is meshed and connected with the gear B 413 at a second transmission ratio, that is, when the gear D 423 is meshed with the gear B 413 at a transmission ratio of 1:2 - 1:4, the rotation speeds of the first screw rod 1 and the second screw rod 2 are different at this time, so that the linear moving speeds of the first actuator 101 and the second actuator 201 are different. It should be noted that the structures of the first screw rod 1 and the second screw rod 2 are completely the same.

[0037] Other parts of this embodiment are the same as those of Embodiment 1 or 2, so they will not be elaborated here.

[0038] Embodiment 4:

[0039] A pneumatic direct stroke actuator with double - end synchronization is improved on the basis of any one of Embodiments 1 - 3. As Figures 1-3 shown, an axial pushing device 7 is arranged at one end of the second rotating shaft 421 away from the second screw rod 2. The pushing end of the axial pushing device 7 is connected to one end of the second rotating shaft 421 away from the second screw rod 2 to drive the second rotating shaft 421 to move axially. The axial pushing device 7 includes a pneumatic cylinder, and the end of the push rod of the pneumatic cylinder is connected to one end of the second rotating shaft 421 away from the second screw rod 2.

[0040] The second rotating shaft 421 is axially pushed by the axial pushing device 7 to slide axially. When the second rotating shaft 421 slides to the first position, the C gear 422 is meshed and connected with the A gear 412. When the second rotating shaft 421 slides to the second position, the D gear 423 is meshed and connected with the B gear 413, thereby realizing the switching of the linear movement speed ratio between the first execution part 101 and the second execution part 201.

[0041] Further, one end of the second screw 2 is sleeved with an F gear 6, and the F gear 6 is slidably meshed with the E gear 424, and the transmission ratio between the F gear 6 and the E gear 424 is 1:1.

[0042] Other parts of this embodiment are the same as any one of Embodiments 1-3, so they will not be described in detail.

[0043] Embodiment 5:

[0044] A pneumatic direct stroke actuator with double-end synchronization is improved on the basis of any one of Embodiments 1-4, as Figure 2 and Figure 3 shown, further comprising a support box body 5. First linear chutes 100 and second linear chutes 200 are arranged on the inner wall of the support box body 5. The first linear chute 100 is slidably and cooperatively connected with one side of the first nut seat 10, and the second linear chute 200 is slidably and cooperatively connected with one side of the second nut seat 20.

[0045] A first slider extending into the first linear chute 100 and slidably and cooperatively connected with the first linear chute 100 is arranged on one side of the first nut seat 10, and a second slider extending into the second linear chute 200 and slidably and cooperatively connected with the second linear chute 200 is arranged on one side of the second nut seat 20. Through the cooperation between the slider and the chute, the first nut seat 10 and the second nut seat 20 can stably drive the first execution part 101 and the second execution part 201 to perform linear movement.

[0046] Other parts of this embodiment are the same as any one of Embodiments 1-4, so they will not be described in detail.

[0047] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification and equivalent change made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A pneumatic direct stroke actuator with double-end synchronization, comprising a first screw rod (1) and a second screw rod (2) arranged side by side, characterized in that, One end of the first screw rod (1) is connected with a pneumatic motor (3). An external thread of the first screw rod (1) is sleeved with a first nut seat (10), and one end of the first nut seat (10) is provided with a first actuator (101); an external thread of the second screw rod (2) is sleeved with a second nut seat (20), and one end of the second nut seat (20) is provided with a second actuator (201); a synchronous gear set (4) is meshed between the first screw rod (1) and the second screw rod (2), and the synchronous gear set (4) transmits the rotation speed of the first screw rod (1) to the second screw rod (2) after reducing the speed according to a reduction ratio.

2. The pneumatic direct stroke actuator with double-end synchronization according to claim 1, wherein The synchronous gear set (4) includes a first gear set (41) sleeved on the outside of the first screw rod (1) and a second gear set (42) sleeved on the outside of the second screw rod (2), and the first gear set (41) and the second gear set (42) can be meshed and connected with different transmission ratios.

3. A pneumatic direct stroke actuator with double-end synchronization according to claim 2, characterized in that, The first gear set (41) includes a first rotating shaft (411), a gear A (412), and a gear B (413). One end of the first rotating shaft (411) is in transmission connection with the first screw rod (1), and the other end of the first rotating shaft (411) is in transmission connection with the output shaft of the pneumatic motor (3); the gear A (412) and the gear B (413) are sequentially sleeved on the outside of the first rotating shaft (411), the gear A (412) is meshed and connected with the second gear set (42) with a first transmission ratio, and the gear B (413) is meshed and connected with the second gear set (42) with a second transmission ratio.

4. A pneumatic direct stroke actuator with double-end synchronization according to claim 3, characterized in that, The second gear set (42) includes a second rotating shaft (421), a gear C (422), a gear D (423), a gear E (424), and a shaft support (425). The second rotating shaft (421) is slidably arranged on the shaft support (425), and the gear C (422), the gear D (423), and the gear E (424) are sequentially sleeved on the outside of the second rotating shaft (42), the gear C (422) is meshed and connected with the gear A (412) with a first transmission ratio, the gear D (423) is meshed and connected with the gear B (413) with a second transmission ratio, and the gear E (424) is slidably meshed and connected with one end of the second screw rod (2).

5. A pneumatic direct stroke actuator with double-end synchronization according to claim 4, characterized in that, An axial pushing device (7) is arranged at one end of the second rotating shaft (421) far away from the second screw rod (2), and a pushing end of the axial pushing device (7) is connected with one end of the second rotating shaft (421) far away from the second screw rod (2) to drive the second rotating shaft (421) to move axially.

6. A pneumatic direct stroke actuator with double-end synchronization according to claim 5, characterized in that, The axial pushing device (7) includes a pneumatic cylinder, and a push rod end of the pneumatic cylinder is connected with one end of the second rotating shaft (421) far away from the second screw rod (2).

7. A pneumatic direct stroke actuator with double - end synchronization according to claim 6, characterized in that, A gear F (6) is sleeved on one end of the second screw rod (2), and the gear F (6) is slidably meshed and connected with the gear E (424).

8. A pneumatic direct stroke actuator with double - end synchronization according to any one of claims 1 - 7, characterized in that, It further includes a support box body (5), and a first linear sliding groove (100) and a second linear sliding groove (200) are arranged on the inner wall of the support box body (5). One side of the first linear sliding groove (100) is slidably and cooperatively connected with one side of the first nut seat (10), and one side of the second linear sliding groove (200) is slidably and cooperatively connected with one side of the second nut seat (20).

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