Multi-section electric cylinder with multi-stage stretching structure

Abstract

The utility model provides a multi-section electric cylinder with a multi-stage stretching structure, which comprises a driving assembly and a multi-section electric cylinder, the driving assembly is fixedly connected with the rear end of the multi-section electric cylinder, and the driving assembly comprises a servo motor, a mounting seat and a transmission gear set. Compared with the prior art, the multi-section electric cylinder has the following beneficial effects that the multi-section electric cylinder is arranged, the rotating lead screw II can drive the guide sleeve II to synchronously move while the lead screw I drives the guide sleeve I, and the movement directions are the same, so that the cylinder barrel II and the cylinder barrel III in the multi-section electric cylinder can synchronously stretch and retract; a traditional one-stage-one-stage stretching or retracting working mode is replaced, the reciprocating motion efficiency of the multi-section electric cylinder is greatly improved, the reciprocating motion period is effectively shortened, the multi-section electric cylinder is quite matched with special application scenes needing rapid stretching and retracting, and the working efficiency is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric cylinders, and particularly relates to a multi-stage electric cylinder with a multi-stage extension structure. Background Art

[0002] At present, the traditional multi-stage electric cylinders on the market mainly complete the lifting work by at least two push rods extending or descending step by step. However, this structure of multi-stage electric cylinders requires more time to complete a reciprocating motion, and the reciprocating motion period of the electric cylinder is too long, often resulting in the equipment being unable to meet the high-frequency operation requirements, thus affecting the production efficiency. The main factor causing this problem is the need for one-level transmission. To solve the problem of the too long time taken for the reciprocating motion of the electric cylinder, common countermeasures include increasing the power of the motor. However, these methods also have some drawbacks respectively. Increasing the power of the motor usually involves a relatively high cost investment, and in some cases, it may lead to an increase in energy consumption, and the power increase may not completely solve the problem of slow motion. Therefore, we hope to design a multi-stage electric cylinder with a new structure to solve this problem. Content of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a multi-stage electric cylinder with a multi-stage extension structure to solve the problems put forward in the above background art.

[0004] The utility model is realized through the following technical solutions: A multi-stage electric cylinder with a multi-stage extension structure, comprising: a driving component and a multi-stage electric cylinder. The driving component is fixedly connected to the rear end of the multi-stage electric cylinder. The driving component includes a servo motor, a mounting seat, and a transmission gear set;

[0005] A servo motor is installed on the right side of the front end of the mounting seat, and a transmission gear set is installed inside the mounting seat;

[0006] The multi-stage electric cylinder includes a first lead screw, a second lead screw, a first cylinder barrel, a first guide sleeve, and a second guide sleeve. The rear end of the cylinder barrel is fixedly connected to the left side of the front surface of the mounting seat. A first guide sleeve is slidably installed inside the first cylinder barrel, and a second cylinder barrel is fixed to the front end of the first guide sleeve;

[0007] A second guide sleeve is slidably installed inside the second cylinder barrel, a third cylinder barrel is fixed to the front end of the second guide sleeve, a second lead screw is movably installed inside the third cylinder barrel, and a first lead screw is slidably installed inside the second lead screw.

[0008] As a preferred embodiment, a first nut is installed inside the rear end of the first guide sleeve. The first nut is in transmission connection with the outer wall of the first lead screw. The rear end of the first lead screw is in transmission connection with the transmission gear set. The first guide sleeve cooperates with the first nut and can quickly perform reciprocating motion driven by the first lead screw.

[0009] As a preferred embodiment, a fixed head is fixed to the front end of the first lead screw. A guiding key is respectively clamped on the left side and the right side of the fixed head. The two guiding keys are distributed in an axisymmetric structure, and the outer wall of the first lead screw does not directly contact the inner wall of the second lead screw.

[0010] As a preferred embodiment, guiding chutes are symmetrically formed on the left side and the right side of the inner wall of the second lead screw. The width of the guiding chutes matches the width of the guiding keys. The two guiding keys are slidably installed inside the two guiding chutes. The arrangement of the guiding chutes and the guiding keys enables the second lead screw to rotate synchronously following the rotation of the first lead screw, and at the same time enables the second lead screw to perform reciprocating motion.

[0011] As a preferred embodiment, the outer wall of the second cylinder is slidably connected to the inner wall of the front end of the first cylinder, and the outer wall of the third cylinder is slidably connected to the inner wall of the front end of the second cylinder. The diameter of the first guiding sleeve is larger than the diameter of the second cylinder, and the diameter of the second guiding sleeve is larger than the diameter of the third cylinder.

[0012] As a preferred embodiment, a second nut is installed inside the second guiding sleeve. The second guiding sleeve is in transmission connection with the second lead screw through the second nut, and the outer wall of the second lead screw directly contacts the inner wall of the third cylinder.

[0013] After adopting the above technical solution, the beneficial effect of the present utility model is as follows: By setting multiple electric cylinders to replace the traditional working mode of extending or retracting level by level, the efficiency of the reciprocating motion of the multiple electric cylinders is greatly enhanced, the reciprocating motion period is effectively shortened, which is very suitable for special application scenarios that require rapid extension and recovery, and the working efficiency is effectively improved.

[0014] The cooperation of the first lead screw and the second lead screw with the guiding keys and the guiding chutes replaces the traditional structure mode of step-by-step transmission, and adopts the mode of the first lead screw and the second lead screw that can be synchronously driven, which can greatly improve the efficiency of the reciprocating motion of the equipment and is helpful to improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic diagram of the overall structure of a multi-stage telescopic multi-stage electric cylinder of the present utility model.

[0017] Figure 2Schematic diagram of the connection between the first lead screw and the second lead screw of a multi-stage electric cylinder with a multi-stage extension structure according to the present utility model.

[0018] Figure 3 Schematic cross-sectional view of a multi-stage electric cylinder with a multi-stage extension structure according to the present utility model.

[0019] Figure 4 Schematic diagram of the structure of the second lead screw of a multi-stage electric cylinder with a multi-stage extension structure according to the present utility model.

[0020] In the figure, 100 - drive assembly, 110 - servo motor, 120 - mounting seat, 130 - transmission gear set;

[0021] 200 - multi-stage electric cylinder, 210 - first lead screw, 211 - fixed head, 212 - guide key, 220 - first guide sleeve, 221 - first nut, 230 - second nut, 240 - second guide sleeve, 250 - second lead screw, 251 - guide chute, 260 - guide rail, 270 - first cylinder barrel. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0023] Please refer to Figures 1 to 4 , the present utility model provides a technical solution: a multi-stage electric cylinder 200 with a multi-stage extension structure, including: a drive assembly 100, a multi-stage electric cylinder 200, the drive assembly 100 is fixedly connected to the rear end of the multi-stage electric cylinder 200, the drive assembly 100 includes a servo motor 110, a mounting seat 120 and a transmission gear set 130;

[0024] A servo motor 110 is installed on the right side of the front end of the mounting seat 120, and a transmission gear set 130 is installed inside the mounting seat 120;

[0025] The multi-stage electric cylinder 200 includes a first lead screw 210, a second lead screw 250, a first cylinder barrel 270, a first guide sleeve 220 and a second guide sleeve 240. The rear end of the first cylinder barrel 270 is fixedly connected to the left side of the front surface of the mounting seat 120. A first guide sleeve 220 is slidably installed inside the cylinder barrel. A second cylinder barrel is fixed to the front end of the first guide sleeve 220;

[0026] A second guide sleeve 240 is slidably installed inside the second cylinder barrel. A third cylinder barrel is fixed to the front end of the second guide sleeve 240. A second lead screw 250 is movably installed inside the third cylinder barrel. A first lead screw 210 is slidably installed inside the second lead screw 250.

[0027] Please refer to Figure 2 、 Figure 4 Inside the rear end of the first guide sleeve 220, a first lead nut 221 is installed. The first lead nut 221 is in driving connection with the outer wall of the first lead screw 210. The rear end of the first lead screw 210 is in driving connection with the transmission gear set 130. The first guide sleeve 220 cooperates with the first lead nut 221 and can quickly reciprocate under the drive of the first lead screw 210.

[0028] A fixing head 211 is fixed to the front end of the first lead screw 210. A guide key 212 is respectively clamped on the left side and the right side of the fixing head 211. The two guide keys 212 are distributed in an axisymmetric structure. The outer wall of the first lead screw 210 does not directly contact the inner wall of the second lead screw 250.

[0029] On the left side and the right side of the inner wall of the second lead screw 250, a guide chute 251 is axially symmetrically provided. The width of the guide chute 251 matches the width of the guide key 212. The two guide keys 212 are slidably installed inside the two guide chutes 251. The arrangement of the guide chute 251 and the guide key 212 enables the second lead screw 250 to rotate synchronously following the rotation of the first lead screw 210, and at the same time enables the second lead screw 250 to reciprocate.

[0030] As the first embodiment of the present utility model, the arrangement of the first lead screw 210, the second lead screw 250, the guide key 212 and the guide chute 251. In actual use, the front end of the first lead screw 210 is slidably connected to the guide chute 251 on the inner wall of the second lead screw 250 through the guide key 212. The first lead screw 210 and the second lead screw 250 can slide relative to each other, and it does not affect the first lead screw 210 to drive the second lead screw 250 to rotate. Replacing the traditional structure mode of step-by-step transmission, adopting the mode of the first lead screw 210 and the second lead screw 250 that can be synchronously driven can greatly improve the efficiency of the reciprocating motion of the equipment and help to improve the user experience.

[0031] Please refer to Figures 1 to 4 , the outer wall of the second cylinder is slidably connected to the inner wall of the front end of the first cylinder 270. The outer wall of the third cylinder is slidably connected to the inner wall of the front end of the second cylinder. The diameter of the first guide sleeve 220 is larger than the diameter of the second cylinder. The diameter of the second guide sleeve 240 is larger than the diameter of the third cylinder.

[0032] A second lead nut 230 is installed inside the second guide sleeve 240. The second guide sleeve 240 is in driving connection with the second lead screw 250 through the second lead nut 230. The outer wall of the second lead screw 250 is in direct contact with the inner wall of the third cylinder.

[0033] As a second embodiment of the present utility model, based on the above-mentioned first embodiment, in actual use, the screw rod 210 rotates under the drive of the transmission gear set 130, and the rotating screw rod 210 drives the nut 221 installed inside the guide sleeve 220, thereby making the guide sleeve 220 extend or retract inside the cylinder barrel 270. At the same time, the rotation of the screw rod 210 drives the screw rod 250 to rotate inside the cylinder barrel 3 through the fixed head 211 and the guide key 212. Due to the screw rod 250 and the nut 230 inside the guide sleeve, the screw rod 250 rotates inside the cylinder barrel 3. Transmission connection, the rotating screw rod 250 can drive the guide sleeve 240 to move synchronously while the screw rod 1 210 drives the guide sleeve 1 220, and the movement direction is the same, which enables the cylinder barrels 2 and 3 in the multi-section electric cylinder 200 to be extended and retracted synchronously, replacing the traditional one-step extension or retraction working mode, greatly enhancing the efficiency of the reciprocating motion of the multi-section electric cylinder 200, effectively shortening the reciprocating motion cycle, and is very suitable for special application scenarios that require rapid extension and recovery, and effectively improves work efficiency.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage electric cylinder with a multi-stage extension structure, comprising: Drive assembly (100), multi-stage electric cylinder (200), characterized in that the drive assembly (100) is fixedly connected to the rear end of the multi-stage electric cylinder (200), and the drive assembly (100) includes a servo motor (110), a mounting seat (120) and a transmission gear set (130); The servo motor (110) is installed on the right side of the front end of the mounting seat (120), and the transmission gear set (130) is installed inside the mounting seat (120); The multi-stage electric cylinder (200) includes a first lead screw (210), a second lead screw (250), a first cylinder barrel (270), a first guide sleeve (220) and a second guide sleeve (240). The rear end of the first cylinder barrel (270) is fixedly connected to the left side of the front surface of the mounting seat (120). The first guide sleeve (220) is slidably installed inside the cylinder barrel, and a second cylinder barrel is fixed to the front end of the first guide sleeve (220); The second guide sleeve (240) is slidably installed inside the second cylinder barrel. A third cylinder barrel is fixed to the front end of the second guide sleeve (240). The second lead screw (250) is movably installed inside the third cylinder barrel, and the first lead screw (210) is slidably installed inside the second lead screw (250).

2. The multi-stage electric cylinder with a multi-stage extension structure according to claim 1, characterized in that: A first nut (221) is installed inside the rear end of the first guide sleeve (220). The first nut (221) is in transmission connection with the outer wall of the first lead screw (210), and the rear end of the first lead screw (210) is in transmission connection with the transmission gear set (130).

3. The multi-stage electric cylinder with a multi-stage extension structure according to claim 1, characterized in that: A fixed head (211) is fixed to the front end of the first lead screw (210). A guide key (212) is respectively clamped on the left side and the right side of the fixed head (211). The two guide keys (212) are distributed in an axisymmetric structure. The outer wall of the first lead screw (210) does not directly contact the inner wall of the second lead screw (250).

4. The multi-stage electric cylinder with a multi-stage extension structure according to claim 3, characterized in that: A guide chute (251) is axially symmetrically opened on the left side and the right side of the inner wall of the second lead screw (250). The width of the guide chute (251) matches the width of the guide key (212). The two guide keys (212) are slidably installed inside the two guide chutes (251).

5. The multi-stage telescopic multi-joint electric cylinder according to claim 1, characterized in that: The outer wall of the second cylinder barrel is slidably connected to the inner wall of the front end of the first cylinder barrel (270). The outer wall of the third cylinder barrel is slidably connected to the inner wall of the front end of the second cylinder barrel. The diameter of the first guide sleeve (220) is larger than the diameter of the second cylinder barrel. The diameter of the second guide sleeve (240) is larger than the diameter of the third cylinder barrel.

6. The multi-stage electric cylinder with a multi-stage extension structure according to claim 1, characterized in that: A second nut (230) is installed inside the second guide sleeve (240). The second guide sleeve (240) is in transmission connection with the second lead screw (250) through the second nut (230). The outer wall of the second lead screw (250) directly contacts the inner wall of the third cylinder barrel.

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