CN219304619U - Servo multistage electric cylinder - Google Patents
Servo multistage electric cylinder Download PDFInfo
- Publication number
- CN219304619U CN219304619U CN202320372336.5U CN202320372336U CN219304619U CN 219304619 U CN219304619 U CN 219304619U CN 202320372336 U CN202320372336 U CN 202320372336U CN 219304619 U CN219304619 U CN 219304619U
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- push rod
- cylinder
- nut
- stage push
- limit
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Abstract
The utility model discloses a servo multistage electric cylinder, which is provided with a second-stage push rod, a first-stage push rod and a screw rod which are sequentially and slidably sleeved from outside to inside, wherein a first nut and a second nut are respectively arranged on the first-stage push rod and the second-stage push rod, and the first nut and the second nut are respectively in threaded connection with the screw rod and the first-stage push rod.
Description
Technical Field
The utility model relates to the technical field of transmission devices, in particular to a servo multistage electric cylinder.
Background
With the development of engineering machinery industry, the electric cylinder has wide application in a plurality of important fields such as industry, agricultural national defense and the like.
Because of the reasons of small expansion ratio, large volume, small bearing capacity and the like of the common electric cylinder, the multi-stage electric cylinder becomes one of key technologies of the current important research in the field, and the traditional multi-stage electric cylinder on the current market mainly stretches out or descends step by step through at least two push rods to finish lifting work, but the multi-stage electric cylinder with the structure needs more time to finish one reciprocating motion, and has obvious defects to industries needing to finish lifting work quickly.
Disclosure of Invention
Based on the above, aiming at the prior technical problems, the utility model provides the servo multistage electric cylinder which can realize synchronous extension or descent of the multistage push rod, can greatly reduce the time of the multistage electric cylinder for completing one-time reciprocating motion, and is suitable for the industry for rapidly completing lifting work.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a servo multistage electric cylinder comprises a cylinder body, a screw rod, a first-stage push rod, a second-stage push rod, a first nut component, a second nut, a guide cylinder and an electric device;
the electric device and the screw rod are respectively positioned outside the cylinder body and inside the cylinder body, and the screw rod is provided with a first end and a second end; the electric device is connected with the first end; the second-stage push rod, the first-stage push rod and the screw rod are sequentially arranged in a sliding sleeve manner from outside to inside;
the first nut component comprises a first nut, and the first nut and the second nut are respectively arranged on the first-stage push rod and the second-stage push rod and are respectively in threaded fit connection with the screw rod and the first-stage push rod; the friction force between the first nut and the screw rod is equal to the friction force between the second nut and the first-stage push rod;
the guide cylinder is arranged between the cylinder body and the second-stage push rod and is connected with the first nut component, a guide gap is formed between the guide cylinder and the second-stage push rod, and the second nut is slidably arranged in the guide gap.
In one embodiment, the device further comprises a guiding limiting ring, wherein the guiding limiting ring is arranged at one end of the cylinder body close to the second end and can be sleeved outside the guiding cylinder in a sliding manner.
In one embodiment, the guide limiting ring is provided with a first ring part and a second ring part, and the inner surfaces of the first ring part and the second ring part are abutted against the guide cylinder; the first ring part is positioned in the cylinder body, the second ring part is positioned outside the cylinder body, and the second ring part is detachably connected with the cylinder body.
In one embodiment, a gap is provided between the first ring portion and the cylinder.
In one embodiment, a weight-reducing groove is provided on the inner side of the second ring portion.
In one embodiment, the device further comprises a lower stroke limiting assembly corresponding to the second-stage push rod, wherein the lower stroke limiting assembly is installed on one end, close to the second end, of the guide cylinder and used for limiting the descending stroke of the second-stage push rod.
In one embodiment, the second-stage push rod is provided with a limit step at one end close to the second end, the downstroke limit assembly comprises a limit installation block and a limit screw installed on the limit installation block, the limit installation block is detachably installed on the guide cylinder, one end of the limit screw is located in the limit installation block, the other end of the limit screw extends out of the limit installation block to correspond to the limit step, the limit screw is located at one side of the first end of the limit step, and when the second-stage push rod is in a retracted state, the limit screw is abutted to the limit step.
In one embodiment, the limiting mounting block comprises a first mounting ring and a second mounting ring which are connected, the first mounting ring is located in the guide cylinder and detachably connected with the guide cylinder through threads, the second mounting ring is located outside the guide cylinder, the cross section size of the second mounting ring is larger than that of the guide cylinder, and the limiting screw is mounted on the second mounting ring.
In one embodiment, the first nut assembly further includes a moving block and a first bearing, the moving block is annular and surrounds the first-stage push rod, the moving block includes a first connecting portion and a second connecting portion, the first connecting portion is detachably connected with the guide cylinder and is located at one side, far away from the second-stage push rod, of the guide cylinder, the second connecting portion is located at one side, close to the first end, of the guide cylinder, and the first bearing is connected with the second connecting portion and the second-stage push rod.
In one embodiment, the device further comprises an intermediate block, the intermediate block is in a ring shape, the intermediate block is located between the guide cylinder and the second-stage push rod and between the second connecting portion and the second nut, the intermediate block is detachably connected with the second connecting portion, and when the second-stage push rod is in a retracted state, the intermediate block abuts against the second nut.
Compared with the prior art, the multistage electric cylinder has the beneficial effects that:
1. according to the utility model, the second-stage push rod, the first-stage push rod and the screw rod are sequentially and slidably sleeved from outside to inside, the first nut and the second nut are respectively arranged on the first-stage push rod and the second-stage push rod, and the first nut and the second nut are respectively in threaded connection with the screw rod and the first-stage push rod, so that when the servo motor electric cylinder works, the screw rod can drive the first-stage push rod to do telescopic linear motion through the first nut, the first-stage push rod can drive the second-stage push rod to do telescopic linear motion through the second nut, and the friction force between the first nut and the screw rod is equal to the friction force between the second nut and the first-stage push rod, so that the first-stage push rod and the second-stage push rod can synchronously extend or retract, and compared with the traditional multi-stage push rod, the time for completing one-stage reciprocating motion of the multi-stage electric cylinder is greatly reduced, and the servo motor electric cylinder is very suitable for the industry for rapidly completing lifting work;
2. through the setting of the guide clearance between guide cylinder and the second level push rod for the second nut can take the second level push rod to do stable rectilinear motion under the direction effect of guide clearance, has reduced the noise. In addition, the guide cylinder is connected with the first-stage push rod through the first nut component, when the first-stage push rod is in telescopic linear motion under the action of the first nut, the first-stage push rod can be in telescopic linear motion together with the guide cylinder under the action of the first nut component, so that the guide cylinder can always play a guide role on the second nut when the second-stage push rod is in telescopic linear motion, the second-stage push rod connected with the second nut can be guaranteed to be in stable lifting linear motion, and the purpose of noise reduction is further achieved.
Drawings
FIG. 1 is a cross-sectional view of a servo multistage electric cylinder according to an embodiment of the present utility model;
FIG. 2 is an enlarged view of the circled portion A of FIG. 1;
fig. 3 is an enlarged view of the area encircled by circle B in fig. 1.
In the figure:
10. a cylinder; 21. a screw rod; 211. a first end; 212. a second end; 22. a first stage push rod; 23. a second stage push rod; 231. a limit step; 24. a guide cylinder; 25. a guide gap; 30. a first nut assembly 31, a first nut; 32. a moving block; 321. a first connection portion; 322. a second connecting portion; 33. a first bearing; 40. a second nut; 50. a downstroke limit assembly; 51. a limit mounting block; 511. a first mounting ring; 512. a second mounting ring; 52. a limit screw; 60. a guide limit ring; 61. a first ring portion; 62. a second ring portion; 621. a weight reduction groove; 70. a load connection; 80. a middle block; 90. an electric device; 91. a mounting shell; 911. a mounting cavity; 92. a motor; 93. a synchronizing wheel drive assembly; 94. a bearing seat; 95. and a second bearing.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1 to 3, a servo multistage electric cylinder according to an embodiment of the present utility model includes a cylinder body 10, a screw rod 21, a first stage push rod 22, a second stage push rod 23, a first nut assembly 30, a second nut 40, a guide cylinder 24, a lower stroke limit assembly 50, a guide limit ring 60, a load connection member 70, and an electric device 90.
As shown in fig. 1, the electric device 90 and the screw 21 are respectively positioned outside the cylinder 10 and inside the cylinder 10, the screw 21 has a first end 211 and a second end 212, the electric device 90 is connected with the first end 211 to drive the screw 21 to rotate, and the first-stage push rod 22, the second-stage push rod 23 and the guide cylinder 24 are arranged between the cylinder 10 and the screw 21; the second-stage push rod 23, the first-stage push rod 22 and the screw rod 21 are sequentially and slidably sleeved from outside to inside, namely, the second-stage push rod 23 is slidably sleeved outside the first-stage push rod 22, so that the second-stage push rod 23 can extend or retract relative to the first-stage push rod 22, and the first-stage push rod 22 is slidably sleeved outside the screw rod 21, so that the first-stage push rod 22 can extend or retract relative to the screw rod 21; the second stage push rod 23 is mounted with a load coupling 70 at an end thereof adjacent to the second end 212 such that the second stage push rod 23 is coupled to an external load member through the load coupling 70.
As shown in fig. 2, the first nut assembly 30 includes a first nut 31, and a first nut 31 and a second nut 40 are respectively mounted on the first-stage push rod 22 and the second-stage push rod 23 and respectively sleeved outside the screw rod 21 and the first-stage push rod 22, and outer surfaces of the first nut 31 and the second nut 40 are respectively in threaded fit connection with inner surfaces of the screw rod 21 and the first-stage push rod 22. In operation, the electric device 90 drives the screw rod 21 to rotate, the rotating screw rod 21 drives the first-stage push rod 22 to do telescopic linear motion through the first nut 31, and the first-stage push rod 22 drives the second-stage push rod 23 to do telescopic linear motion through the second nut 40. The friction force between the first nut 31 and the screw rod 21 is equal to the friction force between the second nut 40 and the first-stage push rod 22, so that the first-stage push rod 22 and the second-stage push rod 23 can synchronously extend or retract, compared with the traditional multi-stage push rod, the multi-stage electric cylinder has the advantages that the time for completing one-time reciprocating motion of the multi-stage electric cylinder is greatly reduced, and the multi-stage electric cylinder is very suitable for the industry for rapidly completing lifting work.
Referring to fig. 1 again, the guide cylinder 24 is disposed between the cylinder 10 and the second-stage push rod 23 and is connected to the first nut assembly 30, a guide gap 25 is formed between the guide cylinder 24 and the second-stage push rod 23, the second nut 40 is slidably disposed in the guide gap 25, and the second nut 40 can make the second nut 40 carry the second-stage push rod 23 to perform stable linear motion under the guiding action of the guide gap 25 formed between the guide cylinder 24 and the second-stage push rod 23, so as to reduce noise.
As shown in fig. 2, the first nut assembly 30 further includes a moving block 32 and a first bearing 33, the moving block 32 is in a ring shape and surrounds the first-stage push rod 22, the moving block 32 includes a first connecting portion 321 and a second connecting portion 322, the first connecting portion 321 is detachably connected with the guide cylinder 24 and is located at a side of the guide cylinder 24 away from the second-stage push rod 23, the second connecting portion 322 is located at a side of the guide cylinder 24 close to the first end 211, the first bearing 33 connects the second connecting portion 322 and the second-stage push rod 23, so that the moving block 32 and the first-stage push rod 22 are connected through the first bearing 33, and therefore, when the first-stage push rod 22 performs telescopic rectilinear motion under the action of the first nut 31, the first-stage push rod 22 can perform telescopic rectilinear motion together with the guide cylinder 24, and further the guide cylinder 24 can always perform a guiding function on the second nut 40 when the second-stage push rod 23 performs telescopic rectilinear motion, so that the second-stage push rod 23 connected with the second nut 40 can also perform stable lifting rectilinear motion.
The lower stroke limiting assembly 50 is disposed corresponding to the second-stage push rod 23, and the lower stroke limiting assembly 50 is mounted on an end of the guide cylinder 24 near the second end 212 for limiting the descending stroke of the second-stage push rod 23. As shown in fig. 3, specifically, the end of the second-stage push rod 23 near the second end 212 is provided with a limit step 231, the downstroke limit assembly 50 includes a limit mounting block 51 and a limit screw 52 mounted on the limit mounting block 51, the limit mounting block 51 is detachably mounted on the guide cylinder 24, one end of the limit screw 52 is located in the limit mounting block 51, the other end extends out of the limit mounting block 51 and corresponds to the limit step 231 and is located at one side of the first end 211 of the limit step 231, when the second-stage push rod 23 is in a retracted state, the limit screw 52 abuts against the limit step 231 to limit the second-stage push rod 23 to continue to descend, because the end of the second-stage push rod 23 near the second end 212 is connected with the load connecting piece 70, and the limit screw 52 can also help the second-stage push rod 23 to share the load force when it descends to the original position.
Further, the limiting mounting block 51 includes a first mounting ring 511 and a second mounting ring 512, the first mounting ring 511 is located in the guide cylinder 24 and is detachably connected with the guide cylinder 24 through threads, the second mounting ring 512 is located outside the guide cylinder 24, the cross-sectional dimension of the second mounting ring 512 is larger than that of the guide cylinder 24, and the limiting screw 52 is mounted on the second mounting ring 512. The first mounting ring 511 provided with the limiting mounting block 51 is detachably connected with the guide cylinder 24 through threads, so that the whole lower stroke limiting assembly 50 is convenient to assemble, disassemble and replace on the guide cylinder 24.
The guiding limiting ring 60 is installed at one end of the cylinder body 10 near the second end 212, and can be sleeved outside the guiding cylinder 24 in a sliding manner, so that the guiding cylinder 24 can perform limiting guiding, and the guiding cylinder 24 can perform stable telescopic linear motion, thereby achieving the purpose of reducing noise generation.
The guide stopper ring 60 has a first ring portion 61 and a second ring portion 62, and inner surfaces of the first ring portion 61 and the second ring portion 62 are abutted against the guide cylinder 24; the first ring portion 61 is located in the cylinder 10, the second ring portion 62 is located outside the cylinder 10, and the second ring portion 62 is detachably connected to the cylinder 10, so that the guide limiting ring 60 can be conveniently detached and replaced on the cylinder 10.
In order to reduce the weight of the guide stopper ring 60, it is preferable that a gap between the first ring portion 61 and the cylinder 10 is provided and a weight reducing groove 621 is provided on an inner side surface of the second ring portion 62.
The servo multistage electric cylinder further comprises an intermediate block 80, the intermediate block 80 is annular, the intermediate block 80 is located between the guide cylinder 24 and the second-stage push rod 23 and between the second connecting portion 322 and the second nut 40, the intermediate block 80 is detachably connected with the second connecting portion 322, and when the second-stage push rod 23 is in a retracted state, the intermediate block 80 abuts against the second nut 40. The provision of the intermediate block 80 can shorten the thread of the second nut 40 on the first-stage push rod 22, thereby shortening the lifting time of the second-stage push rod 23 connected to the second nut 40.
Referring again to fig. 1, the electric device 90 includes a mounting housing 91, a motor 92 and a synchronous wheel transmission assembly 93, a mounting cavity 911 is provided in the mounting housing 91, the motor 92 is mounted on the mounting housing 91 and located outside the mounting housing 91, the synchronous wheel transmission assembly 93 is mounted in the mounting cavity 911, and an output shaft of the motor 92 and a first end 211 of the screw 21 extend into the mounting cavity 911 and are in transmission connection through the synchronous wheel transmission assembly 93.
The electric device 90 further comprises a bearing seat 94 mounted on the mounting shell 91, the bearing seat 94 is located between the cylinder 10 and the mounting shell 91, the screw 21 is rotatably mounted on the bearing seat 94, and the first end 211 of the screw 21 extends into the mounting cavity 911 through the bearing seat 94; a second bearing 95 sleeved outside the screw rod 21 is arranged in the bearing seat 94.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The servo multistage electric cylinder is characterized by comprising a cylinder body, a screw rod, a first stage push rod, a second stage push rod, a first nut component, a second nut, a guide cylinder and an electric device;
the electric device and the screw rod are respectively positioned outside the cylinder body and inside the cylinder body, and the screw rod is provided with a first end and a second end; the electric device is connected with the first end; the second-stage push rod, the first-stage push rod and the screw rod are sequentially arranged in a sliding sleeve manner from outside to inside;
the first nut component comprises a first nut, and the first nut and the second nut are respectively arranged on the first-stage push rod and the second-stage push rod and are respectively in threaded fit connection with the screw rod and the first-stage push rod; the friction force between the first nut and the screw rod is equal to the friction force between the second nut and the first-stage push rod;
the guide cylinder is arranged between the cylinder body and the second-stage push rod and is connected with the first nut component, a guide gap is formed between the guide cylinder and the second-stage push rod, and the second nut is slidably arranged in the guide gap.
2. The servo multistage electric cylinder of claim 1, further comprising a guide stop collar mounted to an end of the cylinder body proximate the second end and slidably received over the guide cylinder.
3. The servo multistage electric cylinder of claim 2 wherein the guide stop collar has a first ring portion and a second ring portion, the inner surfaces of both the first and second ring portions abutting the guide cylinder; the first ring part is positioned in the cylinder body, the second ring part is positioned outside the cylinder body, and the second ring part is detachably connected with the cylinder body.
4. A servo multistage electric cylinder as claimed in claim 3, characterized in that the gap between the first ring portion and the cylinder body is provided.
5. A servo multistage electric cylinder as claimed in claim 3, characterized in that a weight-reducing groove is provided on the inner side surface of the second ring portion.
6. The servo multistage electric cylinder of claim 1, further comprising a downstroke limit assembly disposed in correspondence with the second stage pushrod, the downstroke limit assembly being mounted on an end of the guide cylinder proximate the second end for limiting the downstroke of the second stage pushrod.
7. The servo multistage electric cylinder of claim 6, wherein one end of the second-stage push rod, which is close to the second end, is provided with a limit step, the downstroke limit assembly comprises a limit installation block and a limit screw installed on the limit installation block, the limit installation block is detachably installed on the guide cylinder, one end of the limit screw is located in the limit installation block, the other end of the limit screw extends out of the limit installation block to be arranged corresponding to the limit step and is located on one side of the first end of the limit step, and when the second-stage push rod is in a retracted state, the limit screw is abutted against the limit step.
8. The servo multistage electric cylinder of claim 7, wherein the limit mounting block comprises a first mounting ring and a second mounting ring connected, the first mounting ring is located in the guide cylinder and is detachably connected with the guide cylinder through threads, the second mounting ring is located outside the guide cylinder, the cross-sectional dimension of the second mounting ring is larger than the cross-sectional dimension of the guide cylinder, and the limit screw is mounted on the second mounting ring.
9. The servo multistage electric cylinder of claim 1, wherein the first nut assembly further comprises a moving block and a first bearing, the moving block is annular and surrounds the first stage pushrod, the moving block comprises a first connecting portion and a second connecting portion, the first connecting portion is detachably connected with the guide cylinder and is located on a side of the guide cylinder away from the second stage pushrod, the second connecting portion is located on a side of the guide cylinder close to the first end, and the first bearing connects the second connecting portion and the second stage pushrod.
10. The servo multistage electric cylinder of claim 9, further comprising an intermediate block, the intermediate block being annular in shape, the intermediate block being located between the guide cylinder and the second stage push rod and between the second connecting portion and the second nut, the intermediate block detachably connecting the second connecting portion, the intermediate block abutting the second nut when the second stage push rod is in a retracted state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320372336.5U CN219304619U (en) | 2023-03-02 | 2023-03-02 | Servo multistage electric cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320372336.5U CN219304619U (en) | 2023-03-02 | 2023-03-02 | Servo multistage electric cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219304619U true CN219304619U (en) | 2023-07-04 |
Family
ID=86954857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320372336.5U Active CN219304619U (en) | 2023-03-02 | 2023-03-02 | Servo multistage electric cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219304619U (en) |
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2023
- 2023-03-02 CN CN202320372336.5U patent/CN219304619U/en active Active
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