Telescopic electric cylinder speed change structure convenient to adjust

Abstract

The telescopic electric cylinder speed change structure convenient to adjust comprises a gear box mechanism, the gear box mechanism comprises a box shell, a driven shaft and a driving shaft are arranged on the two sides of the interior of the box shell correspondingly, and a driven gear is fixedly connected to the outer surface of the driven shaft. According to the telescopic electric cylinder, through the arrangement of the blades, when the telescopic electric cylinder is used, an attached gear can be driven to rotate through rotation of a driven gear, oil liquid is scraped up through the blades, the oil liquid is scattered outwards along the inclined faces of the blades, the oil liquid is secondarily guided through the liquid scattering edges, and the oil liquid is scattered upwards in an inclined mode; oil is collected at the upper end of the interior of the box shell and drips from the upper end of the interior of the box shell, so that the oil can drip on the driven gear, the driving gear and the transfer gear, the position of the oil is adjusted in this way, it is guaranteed that the oil can be reserved on the gears in the low-oil-amount state, and therefore the gears are prevented from being damaged, and the service life of the gears is prolonged. And the oil liquid does not need to be manually adjusted, so that the use is relatively convenient.

Description

Technical Field

[0001] The invention relates to the technical field of telescopic electric cylinders, and in particular to a telescopic electric cylinder speed changing structure which is easy to adjust. Background Art

[0002] The telescopic electric cylinder is a device that is driven by a motor to achieve telescopic movement. It is widely used in home, industry, medical, automotive and other fields. The speed change of the telescopic electric cylinder is achieved through the meshing of gears in the gearbox, which converts the small torque of the motor into a large torque and the high-speed rotation into a low-speed rotation to provide a higher torque to ensure the thrust of the telescopic electric cylinder.

[0003] In the prior art, such as Chinese patent CN117846448A, an electric telescopic rod is disclosed, which includes: a first end; a second end, the second end is configured to be able to approach or move away from the first end; one of the first end and the second end is connected to a door component of a vehicle, and the other is connected to a body of the vehicle; wherein the electric telescopic rod includes a length direction, and the second end can approach or move away from the first end along the length direction; a driving device, the driving device is arranged at the first end, and is used to provide a driving force; and a screw rod and nut assembly, the screw rod and nut assembly includes a screw rod and a nut cooperating with the screw rod, the driving device is used to drive the screw rod to rotate, and through the rotation of the screw rod, the nut is moved along the axial direction of the screw rod; wherein, when the nut moves along the axial direction of the screw rod, the second end is driven to approach or move away from the first end.

[0004] However, in the prior art, as the use time of the gear box in the telescopic electric cylinder increases, the amount of gear oil will gradually decrease. Therefore, during use, it is necessary to ensure that there is sufficient oil in the gear box. After a long period of use, when the oil in the gear box is reduced, some gears will not be able to contact the oil, which can easily cause some gears to be damaged. It is more troublesome to replace them later, which increases the cost of use. Summary of the invention

[0005] The object of the present invention is to provide an easily adjustable telescopic electric cylinder speed change structure, so as to solve the problem proposed in the above background technology that the amount of gear oil in the gear box of the telescopic electric cylinder will gradually decrease with the increase of usage time. Therefore, during use, it is necessary to ensure that there is sufficient oil in the gear box. After long-term use, when the oil in the gear box is reduced, some gears will not be able to contact with the oil, which may easily cause damage to some gears, making it more troublesome to replace them later, thereby increasing the cost of use.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a telescopic electric cylinder speed change structure that is easy to adjust, including a gear box mechanism, the gear box mechanism includes a box shell, a driven shaft and a driving shaft are respectively arranged on both sides of the interior of the box shell, the outer surface of the driven shaft is fixedly connected with a driven gear, the interior of the box shell is provided with a liquid regulating structure, the liquid regulating structure includes a mounting seat, the mounting seat is installed at the lower end of the interior of the box shell, a bearing is installed inside the mounting seat, an attachment shaft is installed on the inner ring surface of the bearing, an attachment gear is fixedly connected to the lower middle part of the outer surface of the attachment shaft, the attachment gear is meshed with the driven gear, the outer surface of the attachment shaft is provided with a liquid regulating block, the outer surface of the liquid regulating block is fixedly connected with a blade, and the blade is A liquid dispersing edge is fixedly connected to the outer edge of the side, and the side of the liquid dispersing edge close to the liquid regulating block is set as an inclined surface. Through the setting of the blades, when the telescopic electric cylinder is in use, the attached gear can be driven to rotate by the rotation of the driven gear, and the oil is scraped up by the blades and dispersed outward along the inclined surface of the blades. The liquid dispersing edge is used to guide the oil for a second time, so that the oil is dispersed upward at an angle, and the oil is collected at the upper end of the box shell. The oil drips from the upper end of the box shell, so that the oil can drip on the driven gear, the driving gear and the transfer gear. In this way, the position of the oil is adjusted to ensure that oil can remain on the gear when the oil volume is low, thereby avoiding gear damage. In addition, this design does not require manual adjustment of the oil and is more convenient to use.

[0007] Preferably, a hollow groove is provided in the upper middle part of the interior of the liquid regulating block, a sealing gasket is bonded and fixed to the upper end of the liquid regulating block, and an air injection nozzle is installed on the upper end of the sealing gasket. Through the arrangement of the hollow groove and the air injection nozzle, when in use, gas is injected into the hollow groove through the air injection nozzle, so that the hollow groove is in a high-pressure state, and the buoyancy can be utilized to make the liquid regulating block float, and when there is a lot of oil, the inner push block can be prevented from contacting the matching block, so that the liquid regulating block can not rotate. In this way, when there is a lot of oil, the liquid regulating block will not be driven to rotate, and the rotation of the liquid regulating block when there is a lot of oil can be avoided, thereby reducing energy consumption, and at the same time, it can avoid damage to the liquid regulating block under high resistance conditions and increase its service life.

[0008] Preferably, an inner push block is fixedly connected between the outer surface of the attachment shaft and the upper end of the attachment gear, and the upper end of the inner push block is designed in an arc shape.

[0009] Preferably, a matching block is fixedly connected to the lower middle part of the liquid regulating block, and the liquid regulating block is movably connected to the attachment shaft. Through the setting of the matching block, there is more air in the lower middle part of the liquid regulating block, which cooperates with the arc surface on the top of the inner push block to reduce the difficulty of connection between the inner push block and the matching block.

[0010] Preferably, a notch is provided at the upper end of the attachment gear, and a flexible magnetic sheet is fixedly connected inside the notch.

[0011] Preferably, a bottom groove is provided at the outer edge of the lower end of the liquid adjusting block, and an iron sheet is fixedly connected to the inside of the bottom groove. By setting the iron sheet and the flexible magnetic sheet, the liquid adjusting block can be adsorbed by magnetic force when the oil level is low, thereby promoting the connection between the inner push block and the matching block, thereby ensuring that the position of the oil can be adjusted when the oil level is low.

[0012] Preferably, the upper end of the attachment shaft is rotatably connected to an end plate, and one end of the end plate is fixedly connected to the box shell.

[0013] Preferably, a mounting groove is provided on one side of the box shell, a No. 1 through groove is provided in the middle of one side of the mounting groove, a pressure-sealed cover is provided in the middle of the box shell, a transparent plate is provided on one side of the pressure-sealed cover, the transparent plate is clamped with the mounting groove, a No. 2 through groove is provided in the middle of the transparent plate, the transparent plate is fixedly connected to the box shell by bolts, sealing strips need to be installed between the two sides of the pressure-sealed cover and the mounting groove and the transparent plate to prevent the outflow of oil, and the setting of the pressure-sealed cover can facilitate the observation of the amount of oil inside the box shell, so as to facilitate the timely replenishment of the oil inside the box shell.

[0014] Preferably, both sides of the upper end of the box shell are fixedly connected with a telescopic cylinder mounting seat and a motor mounting seat, respectively, one side of the lower end of the box shell is fixedly connected with a limiting seat, the lower end of the limiting seat is fixedly connected with a connecting ear, the two ends of the driven shaft are rotatably connected to the telescopic cylinder mounting seat and the limiting seat, respectively, and the upper end of the driving shaft is rotatably connected to the motor mounting seat.

[0015] Preferably, the interior of the box shell is rotatably connected to a central rotating shaft, the outer surface of the central rotating shaft is fixedly connected to a central rotating gear, the central rotating gear is used to mesh with a driving gear and a driven gear, and one side of the box shell is fixedly connected to a side sealing plate, and an oil inlet nozzle is installed above the middle of the side sealing plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by setting the blades, when the telescopic electric cylinder is in use, the driven gear can be rotated to drive the attached gear to rotate, the blades are used to scrape up the oil, and the oil is dispersed outward along the inclined surface of the blades. The oil is secondary guided by the dispersion edge to disperse the oil upward obliquely, so that the oil is collected at the upper end of the box shell, and the oil drips from the upper end of the box shell so that the oil can drip on the driven gear, the driving gear and the transfer gear. In this way, the position of the oil is adjusted to ensure that the gear can have oil when the oil amount is low, thereby avoiding gear damage. In addition, the design does not require manual adjustment of the oil, and is more convenient to use.

[0017] 2. In the present invention, by setting the empty groove and the gas injection nozzle, when in use, gas is injected into the empty groove through the gas injection nozzle to make the empty groove in a high-pressure state, and the buoyancy can be used to make the liquid regulating block float. When there is a lot of oil, the inner push block can be prevented from contacting the matching block and the liquid regulating block can be prevented from rotating. In this way, the liquid regulating block can be prevented from rotating when there is a lot of oil, and the rotation of the liquid regulating block when there is a lot of oil can be avoided, thereby reducing energy consumption. At the same time, the damage of the liquid regulating block under high resistance state can be avoided, and the service life can be increased.

[0018] 3. In the present invention, by setting the iron sheet and the flexible magnetic sheet, when the oil is low, the liquid regulating block can be adsorbed by magnetic force to promote the connection between the inner push block and the matching block, ensuring that the position of the oil can be adjusted when the oil is low. By setting the matching block, there is more air in the lower middle part of the liquid regulating block, which cooperates with the arc surface on the top of the inner push block to reduce the difficulty of connecting the inner push block and the matching block. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a three-dimensional structure of a telescopic electric cylinder speed change structure that is easy to adjust according to the present invention Figure 1 ; Figure 2 A schematic diagram of a three-dimensional structure of a telescopic electric cylinder speed change structure that is easy to adjust according to the present invention Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of a telescopic electric cylinder speed change structure that is easy to adjust according to the present invention; Figure 4 It is a schematic diagram of the partial structure of a telescopic electric cylinder speed change structure that is easy to adjust according to the present invention; Figure 5 It is a three-dimensional structural schematic diagram of a liquid regulating structure in a telescopic electric cylinder speed changing structure that is easy to adjust according to the present invention; Figure 6 This is an exploded view of a fluid regulating structure in a telescopic electric cylinder speed changing structure that is easy to adjust according to the present invention; Figure 7 The invention provides a telescopic electric cylinder speed change structure that is easy to adjust Figure 6 A schematic diagram of the enlarged structure of the middle A area; Figure 8 The present invention is a schematic diagram of the three-dimensional structure of a liquid regulating block in a telescopic electric cylinder speed changing structure that is easy to adjust.

[0020] In the figure: 1. Gearbox mechanism; 11. Box shell; 12. Connecting ear; 13. Limiting seat; 14. Motor mounting seat; 15. Telescopic cylinder mounting seat; 16. Side sealing plate; 17. Oil inlet nozzle; 18. Pressure sealing cover; 19. Transparent plate; 110. Driving shaft; 111. Driven shaft; 112. Driven gear; 113. Driving gear; 114. Transfer shaft; 115. Transfer gear; 116. Mounting slot; 117. No. 1 through slot; 118. No. 2 through slot; 2. Liquid regulating structure; 21. Mounting seat; 22. Attached gear; 23. End plate; 24. Bearing; 25. Attached shaft; 26. Sealing gasket; 27. Liquid regulating block; 28. Blade; 29. ​​Inner push block; 210. Notch; 211. Air injection nozzle; 212. Empty slot; 213. Iron sheet; 214. Flexible magnetic sheet; 215. Liquid dispersing edge; 216. Bottom slot; 217. Matching block. DETAILED DESCRIPTION

[0021] 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 implementation regulations described 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.

[0022] Example 1: Reference Figure 1 - Figure 8 As shown: a telescopic electric cylinder speed change structure that is easy to adjust, including a gear box mechanism 1, the gear box mechanism 1 includes a box shell 11, a driven shaft 111 and a driving shaft 110 are respectively arranged on both sides of the box shell 11, and a driven gear 112 is fixedly connected to the outer surface of the driven shaft 111, and a liquid regulating structure 2 is arranged inside the box shell 11, and the liquid regulating structure 2 includes a mounting seat 21, and the mounting seat 21 is installed at the lower end of the box shell 11, and a bearing 24 is installed inside the mounting seat 21, and an attachment shaft 25 is installed on the inner ring surface of the bearing 24, and an attachment gear 22 is fixedly connected to the lower middle part of the outer surface of the attachment shaft 25, and the attachment gear 22 is meshed with the driven gear 112, and a liquid regulating block 27 is arranged on the outer surface of the attachment shaft 25, and a blade 28 is fixedly connected to the outer surface of the liquid regulating block 27, and a liquid dispersing edge 215 is fixedly connected to the outer edge of one side of the blade 28, and the liquid dispersing edge 215 is arranged as an inclined surface on the side close to the liquid regulating block 27.

[0023] In the present invention, by setting the blade 28, when the telescopic electric cylinder is in use, the driven gear 112 can be rotated to drive the auxiliary gear 22 to rotate, and the blade 28 is used to scrape the oil, and the oil is dispersed outward along the inclined surface of the blade 28, and the oil is secondary guided by the dispersion edge 215, so that the oil is dispersed upward at an angle, and the oil is collected at the upper end of the box shell 11. The oil drips from the upper end of the box shell 11, so that the oil can drip on the driven gear 112, the driving gear 113 and the transfer gear 115. In this way, the position of the oil is adjusted to ensure that the gear can have oil when the oil volume is low, thereby avoiding gear damage. In addition, this design does not require manual adjustment of the oil, and is more convenient to use.

[0024] Embodiment 2: Figure 5 - Figure 8 As shown, an empty groove 212 is provided at the upper middle part of the liquid regulating block 27, a sealing gasket 26 is bonded and fixed to the upper end of the liquid regulating block 27, an air injection nozzle 211 is installed at the upper end of the sealing gasket 26, an inner push block 29 is fixedly connected between the outer surface of the attachment shaft 25 and the upper end of the attachment gear 22, the upper end of the inner push block 29 is of arc design, a matching block 217 is fixedly connected to the lower middle part of the liquid regulating block 27, the liquid regulating block 27 is movably connected to the attachment shaft 25, and the attachment gear 22 A notch 210 is provided at the upper end, and a flexible magnetic sheet 214 is fixedly connected inside the notch 210. A bottom groove 216 is provided at the outer edge of the lower end of the liquid regulating block 27, and an iron sheet 213 is fixedly connected inside the bottom groove 216. The upper end of the attachment shaft 25 is rotatably connected to the end plate 23, and one end of the end plate 23 is fixedly connected to the box shell 11. The liquid regulating block 27 and the blades 28 are made of plastic material to reduce the weight of the liquid regulating block 27 and the blades 28, so as to ensure that the liquid regulating block 27 floats when there is more oil.

[0025] In the present invention, by setting the empty groove 212 and the gas injection nozzle 211, when in use, gas is injected into the empty groove 212 through the gas injection nozzle 211, so that the empty groove 212 is in a high pressure state, and the buoyancy can be used to float the liquid regulating block 27. When there is a lot of oil, the inner push block 29 can be prevented from contacting the matching block 217, so that the liquid regulating block 27 does not rotate. In this way, when there is a lot of oil, the liquid regulating block 27 is not driven to rotate, and the rotation of the liquid regulating block 27 when there is a lot of oil can be avoided, thereby reducing energy consumption, and at the same time, it can avoid damage to the liquid regulating block 27 under high resistance state, and increase the service life; By setting the iron sheet 213 and the flexible magnetic sheet 214, when the oil level is low, the liquid regulating block 27 can be adsorbed by magnetic force to promote the connection between the inner push block 29 and the matching block 217, ensuring that the position of the oil can be adjusted when the oil level is low. By setting the matching block 217, there is more air in the lower middle part of the liquid regulating block 27, which cooperates with the curved surface on the top of the inner push block 29 to reduce the difficulty of connecting the inner push block 29 and the matching block 217.

[0026] Embodiment 3: According to Figure 1 - Figure 4 As shown, a mounting groove 116 is provided on one side of the box shell 11, and a No. 1 through groove 117 is provided in the middle of one side of the mounting groove 116. A pressure-sealing cover 18 is provided in the middle of the box shell 11, and a transparent plate 19 is provided on one side of the pressure-sealing cover 18. The transparent plate 19 is clamped with the mounting groove 116, and a No. 2 through groove 118 is provided in the middle of the transparent plate 19. The transparent plate 19 is fixedly connected to the box shell 11 by bolts. The two sides of the upper end of the box shell 11 are respectively fixedly connected with the telescopic cylinder mounting seat 15 and the motor mounting seat 14. One side of the lower end of the box shell 11 is fixedly connected with the limiting seat 13, and the lower end of the limiting seat 13 is fixedly connected with the connecting ear 12. The two ends of the driven shaft 111 are respectively connected to the telescopic cylinder mounting seat 15 is rotatably connected to the limiting seat 13, the upper end of the drive shaft 110 is rotatably connected to the motor mounting seat 14, the interior of the box shell 11 is rotatably connected with a rotating shaft 114, the outer surface of the rotating shaft 114 is fixedly connected with a rotating gear 115, the rotating gear 115 is used to mesh with the driving gear 113 and the driven gear 112, one side of the box shell 11 is fixedly connected with a side sealing plate 16, and an oil inlet nozzle 17 is installed above the middle of the side sealing plate 16, and sealing strips need to be installed between the two sides of the pressure sealing cover 18 and the mounting groove 116 and the transparent plate 19 to prevent the outflow of oil. Through the arrangement of the pressure sealing cover 18, it is convenient to observe the amount of oil inside the box shell 11, so as to replenish the oil inside the box shell 11 in time.

[0027] The method of use and working principle of the device: when in use, connect the telescopic cylinder mounting seat 15 with the cylinder body of the telescopic electric cylinder, connect the threaded rod inside it with the driven shaft 111, connect the motor with the motor mounting seat 14, and connect the motor shaft with the drive shaft 110. When telescopic is needed, the driven gear 112 is driven to rotate forward and reversely through the forward and reverse rotation of the motor, and the threaded rod is driven to rotate to achieve telescopic. When the driven gear 112 rotates, the matching gear 22 is driven to rotate. When there is more oil, the liquid regulating block 27 is in a floating state. After long-term use, when the oil is reduced, the height of the liquid regulating block 27 gradually decreases. When the iron sheet 213 and the flexible magnetic sheet 214 are close to each other, the iron sheet 213 and the flexible magnetic sheet 214 are adsorbed by magnetic force. Through the arc surface of the end of the inner push block 29, when the matching block 217 contacts the end of the inner push block 29, the liquid regulating block 27 is moved. Through the adsorption of magnetic force, the matching block 217 moves with the arc surface, so that the matching block 217 contacts the inner push block 29, and then when the driven gear 112 rotates forward or turns over, when the liquid regulating block 27 rotates, the blade 28 and the liquid dispersing edge 215 transmit the oil upward, so that the oil drips from the upper end of the inside of the box shell 11, which can ensure that the driven gear 112, the driving gear 113 and the transfer gear 115 can be left with oil to avoid gear damage. When the oil needs to be replenished, the oil is injected into the box shell 11 by the oil inlet nozzle 17 to avoid gear damage caused by long-term lack of oil. The remaining amount of oil and the position of the liquid regulating block 27 can be observed through the transparent plate 19. When the buoyancy is insufficient, the oil inside the box shell 11 needs to be taken out, and after the side sealing plate 16 is opened, the gas is injected into the empty groove 212 by the gas injection nozzle 211 to ensure that the liquid regulating block 27 can float to a suitable position when the oil is sufficient.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. 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 telescopic electric cylinder speed change structure that is easy to adjust, comprising a gear box mechanism (1), characterized in that: The gearbox mechanism (1) comprises a housing (11), a driven shaft (111) and a driving shaft (110) are respectively arranged on two sides of the housing (11), a driven gear (112) is fixedly connected to the outer surface of the driven shaft (111), a liquid regulating structure (2) is arranged inside the housing (11), the liquid regulating structure (2) comprises a mounting seat (21), the mounting seat (21) is mounted at the lower end of the housing (11), a bearing (24) is installed inside the mounting seat (21), and the bearing ( An attachment shaft (25) is installed on the inner ring surface of the attachment shaft (24); an attachment gear (22) is fixedly connected to the lower middle portion of the outer surface of the attachment shaft (25); the attachment gear (22) is meshed with the driven gear (112); a liquid regulating block (27) is arranged on the outer surface of the attachment shaft (25); a blade (28) is fixedly connected to the outer surface of the liquid regulating block (27); a liquid dispersing edge (215) is fixedly connected to the outer edge of one side of the blade (28); and a side of the liquid dispersing edge (215) close to the liquid regulating block (27) is arranged as an inclined surface.

2. The adjustable telescopic electric cylinder speed change structure according to claim 1 is characterized in that: An empty groove (212) is provided in the upper middle portion of the liquid regulating block (27), a sealing gasket (26) is bonded and fixed to the upper end of the liquid regulating block (27), and an air injection nozzle (211) is installed at the upper end of the sealing gasket (26).

3. The adjustable telescopic electric cylinder speed change structure according to claim 1 is characterized in that: An inner push block (29) is fixedly connected between the outer surface of the auxiliary shaft (25) and the upper end of the auxiliary gear (22), and the upper end of the inner push block (29) is designed in an arc shape.

4. The adjustable telescopic electric cylinder speed change structure according to claim 1 is characterized in that: A matching block (217) is fixedly connected to the lower middle portion of the liquid regulating block (27), and the liquid regulating block (27) is movably connected to the attachment shaft (25).

5. The adjustable telescopic electric cylinder speed change structure according to claim 1 is characterized in that: A notch (210) is provided at the upper end of the auxiliary gear (22), and a flexible magnetic sheet (214) is fixedly connected inside the notch (210).

6. The adjustable telescopic electric cylinder speed change structure according to claim 1 is characterized in that: A bottom groove (216) is provided at the outer edge of the lower end of the liquid regulating block (27), and an iron sheet (213) is fixedly connected to the interior of the bottom groove (216).

7. The adjustable telescopic electric cylinder speed change structure according to claim 1 is characterized in that: The upper end of the attachment shaft (25) is rotatably connected to an end plate (23), and one end of the end plate (23) is fixedly connected to the box shell (11).

8. The adjustable telescopic electric cylinder speed change structure according to claim 1 is characterized in that: A mounting groove (116) is provided on one side of the box shell (11), a first through groove (117) is provided in the middle of one side of the mounting groove (116), a pressure-sealing cover (18) is provided in the middle of the box shell (11), a transparent plate (19) is provided on one side of the pressure-sealing cover (18), the transparent plate (19) is clamped with the mounting groove (116), a second through groove (118) is provided in the middle of the transparent plate (19), and the transparent plate (19) is fixedly connected to the box shell (11) by bolts.

9. The adjustable telescopic electric cylinder speed change structure according to claim 1, characterized in that: The two sides of the upper end of the box shell (11) are respectively fixedly connected with a telescopic cylinder mounting seat (15) and a motor mounting seat (14); one side of the lower end of the box shell (11) is fixedly connected with a limiting seat (13); the lower end of the limiting seat (13) is fixedly connected with a connecting ear (12); the two ends of the driven shaft (111) are respectively rotatably connected to the telescopic cylinder mounting seat (15) and the limiting seat (13); and the upper end of the driving shaft (110) is rotatably connected to the motor mounting seat (14).

10. The adjustable telescopic electric cylinder speed change structure according to claim 1, characterized in that: A central rotating shaft (114) is rotatably connected inside the casing (11), a central rotating shaft (114) is fixedly connected to an outer surface of the central rotating shaft (114), and the central rotating gear (115) is used to mesh with a driving gear (113) and a driven gear (112). A side sealing plate (16) is fixedly connected to one side of the casing (11), and an oil inlet nozzle (17) is installed above the middle of the side sealing plate (16).

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