Manual emergency control electric cylinder

Abstract

The invention discloses a manual emergency control electric cylinder. The electric cylinder comprises a driving motor; the gear transmission part comprises a driving gear and an output gear in transmission connection with the driving gear, the driving gear is installed on the driving motor, and the output gear is connected with the ejector rod through an output shaft; and the manual driving unit comprises a manual connecting part and a first gear in transmission connection with the gear transmission part, and drives the first gear to rotate through the manual connecting part, so that the gear transmission part adjusts the telescopic state of the ejector rod. The manual emergency control electric cylinder provided by the invention has two working modes, in the first working mode, the driving motor drives the driving gear and the output gear to rotate, so that the ejector rod extends and retracts; the second mode is an emergency manual mode, a manual connecting part in the manual driving unit drives a first gear to rotate, and the first gear is in transmission connection with a gear transmission part, so that the gear transmission part is driven to operate, and the telescopic state of the ejector rod is adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of electric cylinders, and in particular to a manual emergency control electric cylinder. Background Art

[0002] At present, the electric cylinder drives the push rod of the electric cylinder to extend and retract through the connection between the motor and the lead screw nut and other mechanisms. However, when the electric cylinder is powered off or fails, the push rod may not be able to extend or retract, causing the work of the work station to be unable to operate normally, seriously affecting the efficiency of the equipment.

[0003] Therefore, when the electric cylinder loses power or fails, how to timely adjust the extension and retraction state of the push rod is a technical problem that technical personnel in this field need to solve at present. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a manual emergency control electric cylinder, which can timely adjust the telescopic state of the push rod when the electric cylinder is powered off or fails.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A manual emergency control electric cylinder, comprising:

[0007] Drive motor;

[0008] A gear transmission part, comprising a driving gear and an output gear drivingly connected to the driving gear, wherein the driving gear is drivingly connected to the driving motor, and the output gear is drivingly connected to the ejector rod via an output shaft to drive the extension and retraction action of the ejector rod;

[0009] The manual driving unit comprises a manual connecting part and a first gear for transmission connection with the gear transmission part, and the manual connecting part drives the first gear to rotate so that the gear transmission part adjusts the telescopic state of the push rod.

[0010] Optionally, in the above-mentioned manual emergency control electric cylinder, the first gear is connected to the electric cylinder housing through a first gear shaft, and the first gear shaft and the electric cylinder housing are slidably connected to switch between a first position and a second position. When the first gear shaft is in the first position, the first gear is in transmission cooperation with the gear transmission part, and when the first gear shaft is in the second position, the first gear is disengaged from the gear transmission part.

[0011] Optionally, in the above-mentioned manual emergency control electric cylinder, the manual drive unit also includes a reset unit, and the reset unit includes a reset spring located between the first end of the first gear shaft and the electric cylinder housing, and the reset spring pushes the first gear shaft to reset from the first position to the second position.

[0012] Optionally, in the above manual emergency control electric cylinder, the reset unit further comprises a spring locking portion, and the spring locking portion enables the reset spring to be reset from a compressed state to a free state.

[0013] Optionally, in the above manual emergency control electric cylinder, the spring locking portion includes a spring mounting seat and a shifting rod, and the return spring is connected to the electric cylinder housing through the spring mounting seat;

[0014] The first end of the shift rod is hinged to the spring mounting seat, the second end of the shift rod is provided with a shift head, and the first end of the first gear shaft is provided with a locking limit block with a limiting groove. When the shift head is located in the limiting groove, the return spring is in a compressed state, and when the shift head is disengaged from the limiting groove, the return spring returns to a free state.

[0015] Optionally, in the above manual emergency control electric cylinder, the first gear shaft is provided with a guide channel connected to the limiting groove, so that the dial head enters the limiting groove through the guide channel;

[0016] The guide channel comprises a first guide channel, a second guide channel and a third guide channel which are interconnected;

[0017] When the dial head is matched with the limiting groove, the dial head located in the first guide channel enters the limiting groove through the second guide channel, and when the dial head is disengaged from the limiting groove, the dial head returns to the first guide channel through the third guide channel;

[0018] The locking limit block is provided with a first guide protrusion, the first guide protrusion has a first guide side surface, when the dial head moves along the first guide channel to the second guide channel, the dial head abuts against the first guide side surface, and the first guide side surface and the side wall of the second guide channel are located in the same plane, so that the dial head slides into the second guide channel;

[0019] A second guide protrusion is provided at the first end of the first gear shaft, and the second guide protrusion has a second guide side surface. When the dial head is disengaged from the limiting groove, the dial head abuts against the second guide side surface, and the second guide side surface and the side wall of the third guide channel are located in the same plane, so that the dial head slides into the third guide channel.

[0020] Optionally, in the above-mentioned manual emergency control electric cylinder, the spring locking portion includes a rotating rod and a sleeve connected to the electric cylinder housing;

[0021] The first end of the rotating rod is rotatably connected to the first end of the first gear shaft, the second end of the rotating rod is rotatably connected to the inner cavity of the sleeve, and the return spring is located between the second end of the rotating rod and the sleeve;

[0022] The second end of the rotating rod is provided with a switching protrusion;

[0023] The first end of the sleeve is provided with a first switching portion, the first switching portion is provided with a first switching groove and a second switching groove, the first switching groove and the second switching groove are provided in a plurality and in the same number, each of the first switching groove and the second switching groove is evenly distributed on the same circumference with the center of the sleeve as the center, and one second switching groove is arranged between any two adjacent first switching grooves;

[0024] When the switching protrusion is embedded in the first switching groove, the return spring is in a free state, and when the switching protrusion is embedded in the second switching groove, the return spring is in a compressed state.

[0025] Optionally, in the above-mentioned manual emergency control electric cylinder, a second switching portion is provided at the second end of the sleeve, and an accommodating space for the rotation of the switching protrusion is provided between the second switching portion and the first switching portion, and a plurality of guide grooves are provided on the second switching portion, and each guide groove is evenly distributed on the same circumference with the center of the sleeve as the center, and corresponds one-to-one with each of the first switching grooves and the second switching grooves, so that the switching protrusion switches between the first switching groove and the second switching groove through the guide grooves.

[0026] Optionally, in the above manual emergency control electric cylinder, the first gear shaft is connected to the electric cylinder housing through a first bearing, and a positioning sleeve is provided between the first gear shaft and the first bearing, the first gear shaft can be slidably connected to the inner cavity of the positioning sleeve along its own axis, and the positioning sleeve and the first bearing are interference fit;

[0027] The first gear shaft is provided with a positioning surface, and the inner wall of the positioning sleeve is provided with a positioning groove for the positioning surface to be embedded, and the first gear shaft and the positioning sleeve are prevented from rotating relative to each other through the positioning surface and the positioning groove.

[0028] Optionally, in the above-mentioned manual emergency control electric cylinder, a connecting slot is provided at the second end of the first gear shaft of the first gear, for driving a driving rod to drive the first gear shaft to rotate by being embedded in the connecting slot, so that the connecting slot forms the manual connecting part.

[0029] The manual emergency control electric cylinder provided by the present invention has two working modes when in use. The first is a normal working mode, that is, the driving motor drives the driving gear of the gear transmission part to rotate so that the output gear rotates, and the rotating output gear realizes the extension and retraction of the push rod through the output shaft connected to the push rod. The second is an emergency manual mode, that is, when there is a sudden power outage or a failure of the electric cylinder, the first gear can be driven to rotate by the manual connection part in the manual drive unit, and the first gear is connected to the gear transmission part in transmission, thereby driving the gear transmission part to operate and adjust the telescopic state of the push rod. Therefore, in the event of a power outage or failure that makes it impossible to extend and retract the push rod by the drive motor, the manual emergency control electric cylinder provided by the present invention can timely adjust the state of the push rod through the manual drive unit to ensure the normal operation of the work station and alleviate the impact on the working efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a structural schematic diagram of a manual emergency control electric cylinder disclosed in an embodiment of the present invention;

[0032] Figure 2 It is a schematic diagram of the structure of the gear transmission part disclosed in the embodiment of the present invention;

[0033] Figure 3 A schematic diagram of the structure of a first gear and a first gear shaft disclosed in an embodiment of the present invention;

[0034] Figure 4 It is a structural schematic diagram of a manual emergency control electric cylinder disclosed in another embodiment of the present invention;

[0035] Figure 5 for Figure 4 A partial enlarged view of A in the middle and a schematic diagram of the structure in which the return spring is in the unlocked state;

[0036] Figure 6 This is a structural schematic diagram of a reset spring in a locked state disclosed in an embodiment of the present invention;

[0037] Figure 7 It is a structural schematic diagram of the assembly of the lever, the return spring and the spring mounting seat disclosed in the embodiment of the present invention;

[0038] Figure 8 It is a schematic diagram of the structure of the guide channel and the locking limit block disclosed in the embodiment of the present invention;

[0039] Fig. 9 This is a structural schematic diagram of a manual emergency control electric cylinder disclosed in yet another embodiment of the present invention;

[0040] Fig.10 It is a schematic structural diagram of a rotating rod and a sleeve disclosed in an embodiment of the present invention;

[0041] Fig.11 It is an exploded schematic diagram of the assembly structure of the rotating rod, sleeve and return spring disclosed in the embodiment of the present invention.

[0042] Among them, 10 is a driving motor;

[0043] 20 is a top rod;

[0044] 100 is a gear transmission part, 110 is a driving gear, 120 is an output gear, 130 is a second gear, 140 is a third gear, and 150 is a fourth gear;

[0045] 200 is the first gear;

[0046] 300 is a first gear shaft, 310 is a locking limit block, 311 is a limit groove, 312 is a first guide protrusion, 3121 is a first guide side surface, 313 is a second guide protrusion, 3131 is a second guide side surface, 320 is a guide channel, 321 is a first guide channel, 322 is a second guide channel, 323 is a third guide channel, 330 is a positioning surface, 340 is a connecting slot, and 350 is a limit boss;

[0047] 400 is the housing of the electric cylinder, 410 is the first housing, 411 is the connecting hole, 412 is the rotation scale, 420 is the second housing, and 430 is the third housing;

[0048] 500 is a return spring;

[0049] 600 is a spring locking portion, 610 is a spring mounting seat, 620 is a lever, 621 is a lever head, 630 is a rotating rod, 631 is a switching protrusion, 640 is a sleeve, 641 is a first switching portion, 6411 is a first switching groove, 6412 is a second switching groove, 642 is a second switching portion, 6421 is a guide groove, 650 is a sleeve mounting seat, 660 is a switching inclined surface, and 670 is a second bearing;

[0050] 700 is the first bearing;

[0051] 800 is the positioning sleeve. DETAILED DESCRIPTION

[0052] The core of the present invention is to provide a manual emergency control electric cylinder, which can timely adjust the telescopic state of the push rod when the electric cylinder is powered off or fails.

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] like Figure 1 and Figure 2 As shown, an embodiment of the present invention discloses a manual emergency control electric cylinder, including a driving motor 10, a gear transmission part 100 and a manual driving unit. Among them, the driving gear 110 of the gear transmission part 100 is installed on the driving motor 10, and the output gear 120 connected to the driving gear 110 is connected to the top rod 20 through the output shaft, thereby forming a first working mode. When the power is turned on, the driving motor 10 is turned on to rotate the driving gear 110, and the output gear 120 connected to the driving gear 110 drives the top rod 20 to extend through the output shaft, and when the driving gear 110 rotates in the opposite direction, the top rod 20 is retracted. At the same time, the manual emergency control electric cylinder provided in this embodiment also includes a manual driving unit having a manual connecting part and a first gear 200, and the first gear 200 in the manual driving unit is connected to the gear transmission part 100 in a transmission connection, thereby forming a second working mode. When a circuit interruption or other faults occur, making it impossible to drive the top rod 20 to be extended or retracted by the drive motor 10, the staff can push the first gear 200 to rotate through the manual connection part, and then drive the gear transmission part 100 to operate, so that the output gear 120 rotates, thereby timely adjusting the extension and retraction state of the top rod 20 to ensure the normal operation of the workstation.

[0055] In a specific embodiment, the first gear 200 is connected to the electric cylinder housing 400 through the first gear shaft 300, and the first gear shaft 300 and the electric cylinder housing 400 are set to be slidably connected, and the first gear shaft 300 can be switched between the first position and the second position. When the first gear shaft 300 slides to the first position, the first gear 200 and the gear transmission part 100 are matched for transmission, so that the first gear 200 can be driven to rotate through the manual connection part to promote the rotation of the gear transmission part 100. When the first gear shaft 300 slides to the second position, the first gear 200 is disengaged from the gear transmission part 100, so when the drive motor 10 drives the gear transmission part 100 to rotate, the first gear 200 has no effect on the gear transmission part 100, thereby ensuring that the gear transmission part 100 has a good transmission efficiency and reducing the power loss of the drive motor 10.

[0056] Further, the manual drive unit further includes a reset unit, and the reset unit includes a reset spring 500. The reset spring 500 is arranged between the first end of the first gear shaft 300 and the electric cylinder housing 400. When the push rod 20 needs to be driven to extend and retract by the manual drive unit, after the first gear shaft 300 is pushed to slide to the first position, the reset spring 500 is in a compressed state. When the manual drive is completed, after the push force on the first gear shaft 300 is canceled, the reset spring 500 is restored to a free state by elastic potential energy, and the reset spring 500 located at the first end of the first gear shaft 300 applies a force to the first gear shaft 300, thereby pushing the first gear shaft 300 back from the first position to the second position, so that the first gear 200 is separated from the gear transmission part 100. Therefore, the reset unit realizes the automatic separation of the first gear 200 from the gear transmission part 100 when the manual drive state is canceled after the first gear 200 is in transmission cooperation with the gear transmission part 100, further improving the automation degree and work efficiency of the manual emergency control electric cylinder provided in this embodiment.

[0057] In addition, when the staff pushes the first gear shaft 300 to the first position, the return spring 500 in the compressed state applies a reaction force to the first gear shaft 300. Therefore, during the manual rotation process, the staff needs to always maintain the thrust on the first gear shaft 300 while applying the torque to rotate the first gear 200, so as to overcome the return spring 500 to push the first gear shaft 300 back from the first position to the second position. Therefore, this not only reduces the efficiency of the manual driving process, but also makes the staff's operation inconvenient and reduces the comfort of the operation. Therefore, in a specific embodiment, the reset unit is further provided with a spring locking portion 600. When the first gear shaft 300 is pushed to the first position, after the thrust on the first gear shaft 300 is cancelled, the spring locking portion 600 locks the reset spring 500, so that the reset spring 500 always remains in a compressed state, but limits the relative movement between the reset spring 500 and the first gear shaft 300, thereby preventing the compressed reset spring 500 from pushing the first gear shaft 300 back to the second position. After the manual drive work is completed, the spring locking portion 600 unlocks the reset spring 500, and then the spring locking portion 600 pushes the first gear shaft 300 from the first position back to the second position.

[0058] like Figure 5 , Figure 6 and Figure 7 As shown, the spring locking part 600 includes a spring mounting seat 610 and a lever 620, wherein the return spring 500 is connected to the electric cylinder housing 400 through the spring mounting seat 610. The first end of the lever 620 is hinged to the spring mounting seat 610, and the second end of the lever 620 is provided with a lever head 621. A locking stop block 310 is provided at the first end of the first gear shaft 300, and a limiting groove 311 is provided on the locking stop block 310. When the first gear shaft 300 slides to the first position, the lever head 621 of the lever 620 can be embedded in the limiting groove 311. At this time, the return spring 500 and the first gear shaft 300 in the compressed state are limited by the cooperation of the lever 620 and the locking stop block 310, so as to prevent the return spring 500 and the first gear shaft 300 from being relatively moved due to the action force between the return spring 500 and the first gear shaft 300, thereby realizing the locking of the return spring 500 in the compressed state. When the shift head 621 of the shift rod 620 disengages from the limiting groove 311, the limiting between the compressed return spring 500 and the first gear shaft 300 is cancelled. When the compressed return spring 500 returns to the free state, the first gear shaft 300 is pushed to the second position, thereby realizing the disengagement of the first gear 200 from the gear transmission part 100 and unlocking the compressed return spring 500.

[0059] like Figure 8As shown, the first gear shaft 300 is provided with a guide channel 320 connected to the limiting groove 311, and the head 621 of the lever 620 enters the limiting groove 311 through the guide channel 320. The guide channel 320 includes a first guide channel 321, a second guide channel 322 and a third guide channel 323 that are connected to each other, and the head 621 is located in the first guide channel 321. Therefore, when the head 621 needs to cooperate with the limiting groove 311, the head 621 located in the first guide channel 321 enters the limiting groove 311 through the second guide channel 322. When the head 621 is separated from the limiting groove 311, the head 621 returns to the first guide channel 321 through the third guide channel 323, thereby realizing the cyclic cooperation between the head 621 and the limiting groove 311.

[0060] In addition, in order to ensure the matching sequence between the dial head 621 and the first guide channel 321, the second guide channel 322 and the third guide channel 323, a first guide protrusion 312 is provided on the locking limit block 310, and the first guide protrusion 312 is located at the intersection of the first guide channel 321, the second guide channel 322 and the third guide channel 323, and the first guide protrusion 312 is provided with a first guide side surface 3121. When the dial head 621 moves from the first guide channel 321 to the second guide channel 322, the dial head 621 abuts against the first guide side surface 3121 and continues to slide along the first guide side surface 3121, and the first guide side surface 3121 and the side wall of the second guide channel 322 are located in the same plane, so that the dial head 621 smoothly enters the second guide channel 322 through the first guide side surface 3121, and finally the dial head 621 is embedded in the limiting groove 311. A second guide protrusion 313 is provided at the first end of the first gear shaft 300, and the second guide protrusion 313 is located at the intersection of the second guide channel 322 and the third guide channel 323, and the second guide protrusion 313 is also provided with a second guide side surface 3131. When the dial head 621 moves upward and disengages from the limiting groove 311, the dial head 621 abuts against the second guide side surface 3131 and continues to move along the second guide side surface 3131. The second guide side surface 3131 and the side wall of the third guide channel 323 are located in the same plane, so that the dial head 621 smoothly enters the third guide channel 323, and finally returns to the first guide channel 321 through the third guide channel 323. In a specific embodiment, a lever mounting hole for accommodating the lever 620 is formed at the first end of the first gear shaft 300, and the end surface of the lever mounting hole is in contact with the return spring 500, and a groove and a protrusion cooperating with the lever head 621 are formed on the inner wall of the lever mounting hole to form a guide channel 320 and a locking limit block 310 respectively.

[0061] like Fig. 9 and Fig.10As shown, the spring locking portion 600 includes a rotating rod 630 and a sleeve 640, wherein the sleeve 640 is fixed on the electric cylinder housing 400 through a sleeve mounting seat 650, the first end of the rotating rod 630 is rotatably mounted on the first end of the first gear shaft 300 through a second bearing 670, and the second end of the rotating rod 630 is also rotatably mounted in the inner cavity of the sleeve 640, and at this time the reset spring 500 is located between the second end of the rotating rod 630 and the sleeve 640. At the same time, the second end of the rotating rod 630 is provided with a switching protrusion 631, the first end of the sleeve 640 is provided with a first switching portion 641, the first switching portion 641 is provided with a first switching groove 6411 and a second switching groove 6412, and the first switching groove 6411 and the second switching groove 6412 are provided in a plurality and the number is the same, each first switching groove 6411 and the second switching groove 6412 are evenly distributed on the same circumference with the center of the sleeve 640 as the center, and a second switching groove 6412 is arranged between any two adjacent first switching grooves 6411. When the switching protrusion 631 is embedded in the second switching groove 6412, the return spring 500 is compressed at this time, and the return spring 500 is locked on the sleeve 640, separating the action force between the return spring 500 with elastic potential energy and the first gear shaft 300, avoiding the first gear shaft 300 from being pushed back to the second position from the first position, and realizing the locking of the return spring 500. When the switching protrusion 631 is embedded in the first switching groove 6411, the groove of the first switching groove 6411 extends in the opposite direction to the first gear shaft 300. At this time, the return spring 500 is in a free state. The return spring 500 applies a thrust to the first gear shaft 300 through the rotating rod 630, so that the first gear shaft 300 is pushed back from the first position to the second position, thereby unlocking the return spring 500. Therefore, by cyclically switching the switching protrusion 631 between each first switching groove 6411 and the second switching groove 6412, the spring locking part 600 realizes the cyclic unlocking and locking function of the return spring 500.

[0062] like Fig.11As shown, in order to allow the rotating rod 630 to rotate in the sleeve 640, the switching protrusion 631 can switch between each first switching groove 6411 and the second switching groove 6412. A second switching portion 642 is provided at the second end of the sleeve 640, and a receiving space for the switching protrusion 631 to rotate is provided between the second switching portion 642 and the first switching portion 641. A plurality of guide grooves 6421 are provided on the second switching portion 642, and each guide groove 6421 is evenly distributed on the same circumference with the center of the sleeve 640 as the center, and each guide groove 6421 corresponds to each first switching groove 6411 and second switching groove 6412 one by one. Therefore, during the process of switching the switching protrusion 631 between the first switching groove 6411 and the second switching groove 6412, when the switching protrusion 631 moves downward, the first end of the switching protrusion 631 is embedded in the guide groove 6421 through the side wall of the guide groove 6421. At this time, relative rotation occurs between the rotating rod 630 and the first switching part 641, causing the second end of the switching protrusion 631 to correspond to the adjacent first switching groove 6411 or the second switching groove 6412, so that during the process of the switching protrusion 631 moving upward, the second end of the switching protrusion 631 abuts against the side wall of the first switching groove 6411 or the second switching groove 6412, and slides into the first switching groove 6411 or the second switching groove 6412, so that the switching protrusion 631 switches between the first switching groove 6411 and the second switching groove 6412 through the guide groove 6421. And during the switching process, in order to ensure smooth switching between the switching protrusion 631 and the first switching groove 6411, the second switching groove 6412 and the second switching groove 6412, mutually matching switching inclined surfaces 660 are provided at both ends of the switching protrusion 631, the first switching groove 6411, the second switching groove 6412 and the second switching groove 6412.

[0063] like Figure 3 and Figure 6As shown, the first gear 200 is fixed on the first gear shaft 300, and the first gear shaft 300 is installed on the electric cylinder housing 400 through the first bearing 700, and a positioning sleeve 800 is arranged between the first gear shaft 300 and the first bearing 700, and the positioning sleeve 800 and the first bearing 700 are interference fit. The first gear shaft 300 can be slidably installed in the inner cavity of the positioning sleeve 800 along its own axis, and the first end and the second end of the first gear shaft 300 are both provided with a positioning surface 330, and the inner wall of the positioning sleeve 800 is provided with a positioning groove, so that the first gear shaft 300 is installed in the positioning groove through the positioning surface 330, thereby preventing the relative rotation between the first gear shaft 300 and the positioning sleeve 800. Therefore, while the first gear 200 is rotated on the electric cylinder housing 400, the sliding of the first gear shaft 300 is achieved, and the first gear shaft 300 can be switched between the first position and the second position. In a specific embodiment, the first gear shaft 300 has a plurality of positioning surfaces 330, and each positioning surface 330 is evenly distributed with the axis of the first gear shaft 300 as the center, and each positioning groove matched with each positioning surface 330 is also evenly distributed on the positioning sleeve 800. In addition, a limiting boss 350 is also provided on the first gear shaft 300. When the first gear shaft 300 moves along its own axis, the limiting boss 350 can abut against the end surface of the positioning sleeve 800, limiting the first gear shaft 300 to move only between the first position and the second position.

[0064] like Figure 3 As shown, a connection slot 340 is provided at the second end of the first gear shaft 300, and the connection slot 340 can be an inner hexagonal groove, or other polygonal grooves, so that the corresponding outer polygonal rotating rod can be inserted into the connection slot 340, and a rotation torque is applied to the first gear shaft 300 by the rotating rod, thereby driving the first gear 200 installed on the first gear shaft 300 to rotate, so that the connection slot 340 forms a manual connection part. Alternatively, the manual connection part can also be a polygonal protrusion, and a groove matching the protrusion is provided on the rotating rod to achieve the matching between the first gear shaft 300 and the rotating rod.

[0065] like Figure 1 and Figure 2As shown, the gear transmission unit 100 also includes a second gear 130, a third gear 140 and a fourth gear 150, wherein the driving gear 110 is meshed with the second gear 130, and the second gear 130 is meshed with the third gear 140, and the third gear 140 and the fourth gear 150 are mounted on the same rotating shaft, so that the third gear 140 and the fourth gear 150 can rotate synchronously, and finally the fourth gear 150 is meshed with the output gear 120. Therefore, the multi-stage gear transmission can make the telescopic movement of the driving motor 10 driving the top rod 20 more stable, and the control accuracy of the telescopic amount is higher. In a specific embodiment, the first gear 200 is meshed with the third gear 140, or those skilled in the art can adjust the meshing relationship between the first gear 200 and other gears according to actual needs, which will not be repeated herein.

[0066] In a specific embodiment, when manually adjusting the telescopic action of the push rod 20, in order to improve the accuracy of adjusting the telescopic amount of the push rod 20, the transmission ratio of the first gear 200 and the third gear 140 is designed to be greater than 1, and then the rotation angle accuracy of the third gear 140 is improved by the rotation of the first gear 200, thereby achieving an improvement in the accuracy of the telescopic feed amount of the push rod 20 during the manual adjustment process.

[0067] like Figure 1 and Figure 4 As shown, the manual emergency control electric cylinder provided in this embodiment also includes an electric cylinder housing 400 for protecting transmission components such as various gears, and the electric cylinder housing 400 includes a first housing 410, a second housing 420 and a third housing 430 that are detachably connected to each other. The first end and the second end of the first gear shaft 300 are respectively mounted on the second housing 420 and the first housing 410 through the first bearing 700, and the first end and the second end of the first gear shaft 300 are connected to the first bearing 700 through the positioning sleeve 800. Among them, the first end and the second end of the first gear shaft 300 are clearance-matched with the positioning sleeve 800, so that the first gear shaft 300 can slide up and down in the positioning sleeve 800 along its own axial direction. At the same time, the first end and the second end of the first gear shaft 300 are both provided with a positioning surface 330, and the inner wall of the positioning sleeve 800 is provided with a positioning groove that matches the positioning surface 330. The relative rotation between the first gear shaft 300 and the positioning sleeve 800 is limited by the cooperation between the positioning surface 330 and the positioning groove. The positioning sleeve 800 and the inner ring of the first bearing 700 are interference fit, thereby realizing that the first end and the second end of the first gear shaft 300 can be rotatably connected on the second housing 420 and the first housing 410. A connecting hole 411 is provided in the first housing 410, so that the rotating rod passes through the connecting hole 411 and is engaged with the connecting slot 340 on the second end of the first gear shaft 300.

[0068] like Figure 1As shown, the first housing 410 is also provided with a rotation scale 412. During the manual adjustment of the mandrel 20, the staff can better control the rotation angle of the first gear 200 according to the rotation scale 412 of the first housing 410, thereby more accurately controlling the extension and retraction of the mandrel 20 to meet the needs of the fine adjustment process. In addition, the first housing 410 is provided with a rotation mark, through which the staff can quickly determine the corresponding rotation direction of the first gear 200 when adjusting the extension or retraction of the mandrel 20, thereby improving the working efficiency of manual adjustment.

[0069] In order to improve the reliability and structural strength of the connection between the first gear 200 and the first gear shaft 300, the first gear 200 and the first gear shaft 300 are processed as one piece. At the same time, the integrated structure of the first gear 200 and the first gear shaft 300 also improves the production efficiency of parts and the assembly efficiency of the manual emergency control electric cylinder provided in this embodiment. In addition, the third gear 140, the fourth gear 150 and the common mounting shaft of the two can also be processed as one piece to further improve the structural strength and the efficiency of the installation work.

[0070] In another specific embodiment, the output shaft of the manual emergency control electric cylinder provided in this embodiment is connected to the push rod 20 by means of a thread, and the thread extends along the extension and retraction direction of the push rod 20, so that when the output shaft and the push rod 20 rotate relative to each other through the thread, the push rod 20 can move along the extension direction of the thread to realize the extension and retraction of the push rod 20.

[0071] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0072] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0073] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0074] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0075] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A manual emergency control electric cylinder, characterized in that: include: A driving motor (10); The gear transmission unit (100) comprises a driving gear (110) and an output gear (120) drivingly connected to the driving gear (110), wherein the driving gear (110) is drivingly connected to the driving motor (10), and the output gear (120) is drivingly connected to the push rod (20) via an output shaft to drive the extension and retraction action of the push rod (20); The manual drive unit comprises a manual connection part and a first gear (200) for transmission connection with the gear transmission part (100), and the first gear (200) is driven to rotate by the manual connection part so that the gear transmission part (100) adjusts the telescopic state of the push rod (20).

2. The manual emergency control electric cylinder according to claim 1, characterized in that: The first gear (200) is connected to the electric cylinder housing (400) via a first gear shaft (300), and the first gear shaft (300) and the electric cylinder housing (400) are slidably connected to switch between a first position and a second position. When the first gear shaft (300) is in the first position, the first gear (200) and the gear transmission part (100) are in transmission cooperation. When the first gear shaft (300) is in the second position, the first gear (200) and the gear transmission part (100) are disengaged.

3. The manual emergency control electric cylinder according to claim 2, characterized in that: The manual drive unit further comprises a reset unit, wherein the reset unit comprises a reset spring (500) located between the first end of the first gear shaft (300) and the electric cylinder housing (400), wherein the reset spring (500) is used to push the first gear shaft (300) to reset from the first position to the second position.

4. The manual emergency control electric cylinder according to claim 3, characterized in that: The reset unit further comprises a spring locking portion (600), wherein the spring locking portion (600) enables the reset spring (500) to be reset from a compressed state to a free state.

5. The manual emergency control electric cylinder according to claim 4, characterized in that: The spring locking portion (600) comprises a spring mounting seat (610) and a shifting rod (620), and the return spring (500) is connected to the electric cylinder housing (400) via the spring mounting seat (610); The first end of the shifting rod (620) is hinged to the spring mounting seat (610), the second end of the shifting rod (620) is provided with a shifting head (621), and the first end of the first gear shaft (300) is provided with a locking limit block (310) having a limit groove (311). When the shifting head (621) is located in the limit groove (311), the return spring (500) is in a compressed state, and when the shifting head (621) is disengaged from the limit groove (311), the return spring (500) returns to a free state.

6. The manual emergency control electric cylinder according to claim 5, characterized in that: The first gear shaft (300) is provided with a guide channel (320) communicating with the limiting groove (311), so that the dial head (621) enters the limiting groove (311) through the guide channel (320); The guide channel (320) comprises a first guide channel (321), a second guide channel (322) and a third guide channel (323) which are interconnected; When the dial head (621) cooperates with the limiting groove (311), the dial head (621) located in the first guide channel (321) enters the limiting groove (311) through the second guide channel (322); when the dial head (621) is disengaged from the limiting groove (311), the dial head (621) returns to the first guide channel (321) through the third guide channel (323); The locking limit block (310) is provided with a first guide protrusion (312), the first guide protrusion (312) having a first guide side surface (3121), when the dial head (621) moves along the first guide channel (321) to the second guide channel (322), the dial head (621) abuts against the first guide side surface (3121), and the first guide side surface (3121) and the side wall of the second guide channel (322) are located in the same plane, so that the dial head (621) slides into the second guide channel (322); A second guide protrusion (313) is provided at the first end of the first gear shaft (300), and the second guide protrusion (313) has a second guide side surface (3131). When the dial head (621) is disengaged from the limiting groove (311), the dial head (621) abuts against the second guide side surface (3131), and the second guide side surface (3131) and the side wall of the third guide channel (323) are located in the same plane, so that the dial head (621) slides into the third guide channel (323).

7. The manual emergency control electric cylinder according to claim 4, characterized in that: The spring locking portion (600) comprises a rotating rod (630) and a sleeve (640) connected to the electric cylinder housing (400); The first end of the rotating rod (630) is rotatably connected to the first end of the first gear shaft (300), the second end of the rotating rod (630) is rotatably connected to the inner cavity of the sleeve (640), and the return spring (500) is located between the second end of the rotating rod (630) and the sleeve (640); The second end of the rotating rod (630) is provided with a switching protrusion (631); The first end of the sleeve (640) is provided with a first switching portion (641), and the first switching portion (641) is provided with a first switching groove (6411) and a second switching groove (6412), and the first switching groove (6411) and the second switching groove (6412) are provided in a plurality and in the same number, and the first switching grooves (6411) and the second switching grooves (6412) are evenly distributed on the same circumference with the center of the sleeve (640) as the center, and one second switching groove (6412) is arranged between any two adjacent first switching grooves (6411); When the switching protrusion (631) is embedded in the first switching groove (6411), the return spring (500) is in a free state, and when the switching protrusion (631) is embedded in the second switching groove (6412), the return spring (500) is in a compressed state.

8. The manual emergency control electric cylinder according to claim 7, characterized in that: A second switching portion (642) is provided at the second end of the sleeve (640), and an accommodating space for the switching protrusion (631) to rotate is provided between the second switching portion (642) and the first switching portion (641), and a plurality of guide grooves (6421) are provided on the second switching portion (642), and each guide groove (6421) is evenly distributed on the same circumference with the center of the sleeve (640) as the center, and corresponds one-to-one with each first switching groove (6411) and the second switching groove (6412), so that the switching protrusion (631) switches between the first switching groove (6411) and the second switching groove (6412) through the guide groove (6421).

9. The manual emergency control electric cylinder according to claim 2, characterized in that: The first gear shaft (300) is connected to the electric cylinder housing (400) via a first bearing (700), and a positioning sleeve (800) is provided between the first gear shaft (300) and the first bearing (700), the first gear shaft (300) can be slidably connected to the inner cavity of the positioning sleeve (800) along its own axis, and the positioning sleeve (800) and the first bearing (700) are interference fit; The first gear shaft (300) is provided with a positioning surface (330), and the inner wall of the positioning sleeve (800) is provided with a positioning groove for the positioning surface (330) to be embedded, so that the first gear shaft (300) and the positioning sleeve (800) are prevented from rotating relative to each other through the positioning surface (330) and the positioning groove.

10. The manual emergency control electric cylinder according to any one of claims 1 to 9, characterized in that: The second end of the first gear shaft (300) of the first gear (200) is provided with a connecting slot (340) for driving a driving rod to drive the first gear shaft (300) to rotate by being embedded in the connecting slot (340), so that the connecting slot (340) forms the manual connecting portion.

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