CN217301402U - Shock absorber and food delivery robot - Google Patents
Shock absorber and food delivery robot Download PDFInfo
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- CN217301402U CN217301402U CN202221094655.6U CN202221094655U CN217301402U CN 217301402 U CN217301402 U CN 217301402U CN 202221094655 U CN202221094655 U CN 202221094655U CN 217301402 U CN217301402 U CN 217301402U
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Abstract
The utility model discloses a shock absorber and food delivery robot relates to intelligent robot technical field. The shock absorber comprises a first connecting part, a second connecting part, a hydraulic buffer and a spring, wherein the hydraulic buffer is arranged between the first connecting part and the second connecting part, and the spring is sleeved on the hydraulic buffer; the hydraulic buffer comprises a cylinder body, a hydraulic rod, a sliding seat and a damping adjusting sheet, wherein the cylinder body is connected with the first connecting part; the hydraulic rod is connected with the second connecting part. The slide sets up in the cylinder body, and the slide is connected with the hydraulic stem, and can slide in the cylinder body along with the hydraulic stem. The damping adjusting sheet is positioned between the sliding seat and the hydraulic rod and can be attached to or separated from the end face of the sliding seat; the flow of the hydraulic oil is larger when the damping adjusting sheet is separated from the end face of the sliding seat than when the damping adjusting sheet is attached to the end face of the sliding seat. The shock absorber can reduce the impact force on the universal wheels and reduce the damage probability of the food delivery robot.
Description
Technical Field
The utility model relates to an intelligent robot technical field especially relates to a shock absorber and food delivery robot.
Background
Food delivery robot includes preceding universal wheel, drive wheel and back universal wheel, and the drive wheel sets up between preceding universal wheel and back universal wheel, is provided with the shock absorber between preceding universal wheel and the drive wheel or between drive wheel and the back universal wheel, and when food delivery robot met the obstacle, the shock absorber can cushion food delivery robot's vibrations, avoids artificial damage to food delivery robot.
In the shock absorber in the prior art, only the spring is used for buffering when obstacles pass. After the front universal wheel crosses the obstacle, the driving wheel has great impact when crossing the obstacle, or after the driving wheel crosses the obstacle, the rear universal wheel has great impact when crossing the obstacle, which shortens the service life of the food delivery robot; but also brings poor use experience to the user.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a shock absorber and food delivery robot, when crossing the obstacle, this shock absorber can reduce the impact force that food delivery robot received, guarantees food delivery robot's stability.
To achieve the purpose, the utility model adopts the following technical proposal:
a shock absorber comprises a first connecting part, a second connecting part, a hydraulic buffer and a spring, wherein the hydraulic buffer is arranged between the first connecting part and the second connecting part, and the spring is sleeved on the hydraulic buffer; the hydraulic shock absorber includes:
a cylinder connected to the first connection part;
the hydraulic rod is connected with the second connecting part;
the sliding seat is arranged in the cylinder body, is connected with the hydraulic rod and can slide in the cylinder body along with the hydraulic rod;
the damping adjusting sheet is positioned between the sliding seat and the hydraulic rod and can be attached to or separated from the end face of the sliding seat;
the flow of the hydraulic oil is larger than that of the hydraulic oil when the damping adjusting sheet is separated from the end face of the sliding seat and the end face of the sliding seat is attached to the damping adjusting sheet.
As an alternative of shock absorber, the slide with form first working chamber between the first connecting portion, the cylinder body is kept away from the one end of first connecting portion is provided with central fixing base, central fixing base with form the second working chamber between the slide, the damping adjustment piece with follow during the terminal surface separation of slide first working chamber gets into the flow of the hydraulic oil of second working chamber is greater than the damping adjustment piece with follow during the terminal surface laminating of slide the second working chamber gets into the flow of the hydraulic oil of first working chamber.
As an alternative of the shock absorber, in the circumferential direction, first damping holes are formed in the sliding base at intervals, second damping holes and third damping holes are formed in the damping adjusting piece at intervals, the first damping holes and the second damping holes are arranged oppositely, and the diameter of each first damping hole is larger than that of each second damping hole; when the damping adjusting sheet is separated from the end face of the sliding seat, hydraulic oil in the first working cavity enters the second working cavity through the first damping hole, the second damping hole and the third damping hole; when the damping adjusting sheet is attached to the end face of the sliding seat, hydraulic oil of the second working cavity enters the first working cavity through the second damping holes and the first damping holes.
As an alternative of shock absorber, the slide still includes the connecting axle, still be provided with first connecting hole on the damping adjustment piece, the connecting axle passes first connecting hole with the hydraulic stem is connected, the external diameter of hydraulic stem is greater than the internal diameter of first connecting hole, the damping adjustment piece can the slide with remove between the hydraulic stem.
As an alternative of the shock absorber, a limiting surface is arranged on the connecting shaft, the first connecting hole is arranged to be a limiting hole, and the limiting hole is matched with the connecting shaft with the limiting surface to limit the damping adjusting sheet to rotate.
As an alternative of the shock absorber, the second damping holes and the third damping holes are distributed on the same circumference along the circumferential direction of the damping adjusting sheet, and the second damping holes and the third damping holes are arranged in a staggered mode.
As an alternative of the shock absorber, damping holes are formed in two circumferential lines with different diameters in the circumferential direction of the sliding seat, the diameter of the damping adjusting piece is smaller than that of the sliding seat, and when the damping adjusting piece is attached to the end face of the sliding seat, the damping adjusting piece can only cover the damping holes in the circumferential line with the smaller diameter; when the damping adjusting sheet is separated from the end face of the sliding seat, hydraulic oil in the first working cavity can enter the second working cavity through the damping holes in the circumferential lines with different diameters and a gap between the damping adjusting sheet and the inner wall of the cylinder body; when the damping adjusting sheet is attached to the end face of the sliding seat, hydraulic oil of the second working cavity can only enter the first working cavity through the damping holes in the circumferential line with the larger diameter.
As an alternative of a shock absorber, the shock absorber further comprises a first spring seat and a second spring seat, the first spring seat is arranged at one end close to the first connecting portion, the second spring seat is arranged at one end close to the second connecting portion, one end of the spring is connected with the first spring seat, the other end of the spring is connected with the second spring seat, the cylinder body is close to one end of the first connecting portion is provided with a first external thread, the first spring seat is provided with a first internal thread, and the first internal thread is matched with the first external thread and can adjust the position of the first spring seat.
As an alternative of the shock absorber, a rubber pad is arranged at one end of the cylinder body close to the first connecting part, and a first working cavity is formed between the sliding seat and the rubber pad; an air cavity is formed between the rubber pad and the first connecting part.
The utility model provides a food delivery robot, includes chassis, drive wheel and universal wheel, the drive wheel set up in the intermediate position on chassis, the universal wheel set up in food delivery robot walking direction's rear or the place ahead, the drive wheel with be provided with any scheme as above between the universal wheel the shock absorber, first connecting portion with the universal wheel is connected, the second connecting portion with the drive wheel is connected.
The utility model has the advantages that:
the utility model provides a shock absorber sets up the damping adjustment piece through setting up between slide and the hydraulic stem in the cylinder body of hydraulic buffer, the terminal surface laminating of damping adjustment piece and slide under the normal condition. The first connecting part is used for being connected with the universal wheel of the meal delivery robot, and the second connecting part is used for being connected with the driving wheel of the meal delivery robot. When the obstacle surmounting device is in obstacle crossing, the shock absorber is subjected to impact force, the hydraulic rod is subjected to the impact force and inclines upwards to enable the damping adjusting sheet to be separated from the end face of the sliding seat, the hydraulic rod can rapidly extrude hydraulic oil, shock generated by impact can be absorbed in time, and the universal wheel can be guaranteed to run stably; meanwhile, the spring is compressed, and after the obstacle is crossed, the damping adjusting sheet can be attached to the end face of the sliding seat under the action of hydraulic oil, so that the hydraulic rod can be slowly restored to the horizontal state, and the universal wheel can be further guaranteed to stably run. In the process, the flow of the hydraulic oil after the damping adjusting sheet is separated from the end face of the sliding seat is larger than that when the damping adjusting sheet is attached to the end face of the sliding seat, the flow of the hydraulic oil when the damping adjusting sheet is separated from the end face of the sliding seat is larger, the formed hydraulic damping is smaller, and the hydraulic rod can rapidly extrude the hydraulic oil and timely absorb the shock generated by impact. After the damping adjusting sheet is attached to the end face of the sliding seat, the flow of hydraulic oil is reduced, and the formed hydraulic damping is larger; therefore, the spring can be slowly restored to the state before obstacle crossing, and the impact force on the universal wheel can be reduced.
Use food delivery robot of above-mentioned shock absorber, when surmounting the obstacle, can make food that food delivery robot upper portion held more stable, reduce food delivery robot's damage probability simultaneously, prolong food delivery robot's life, bring better use for the user and experience.
Drawings
FIG. 1 is a schematic view of a shock absorber according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a shock absorber according to an embodiment of the present invention;
fig. 3 is a first schematic structural diagram of a slide carriage according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a sliding seat according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a damping adjustment sheet according to an embodiment of the present invention.
In the figure:
1. a first connection portion; 2. a second connecting portion; 3. a hydraulic buffer; 4. a spring; 5. a rubber pad; 6. a first spring seat; 7. a second spring seat;
31. a cylinder body; 32. a hydraulic rod; 33. a slide base; 34. a damping adjustment sheet; 35. a central fixed seat; 36. oil sealing; 37. a plastic gasket; 38. a seal ring;
311. a first external thread; 321. a first threaded hole; 331. a first orifice; 332. a connecting shaft; 333. a groove; 341. a second orifice; 342. a third orifice; 343. a limiting hole;
3321. a limiting surface; 3322. and a second connection hole.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
This embodiment provides a food delivery robot, and this food delivery robot includes chassis, drive wheel and universal wheel, and the drive wheel sets up in the intermediate position on chassis, and the universal wheel sets up in food delivery robot walking direction's rear or the place ahead, is provided with the shock absorber between drive wheel and the universal wheel, and first connecting portion are connected with the universal wheel, and second connecting portion are connected with the drive wheel.
The universal wheels arranged in front of the food delivery robot in the walking direction are front universal wheels, and the universal wheels arranged behind the food delivery robot in the walking direction are rear universal wheels. The driving wheel is arranged between the front universal wheel and the rear universal wheel and is driven by a driving motor arranged on the chassis, and the front universal wheel and the rear universal wheel follow up.
The shock absorber can be arranged between the front universal wheel and the driving wheel or between the driving wheel and the rear universal wheel.
A tray for holding food is arranged above the chassis. The food delivery robot that this embodiment provided, when surmounting the obstacle, can make the food that food delivery robot upper portion tray held more stable, reduce food delivery robot's damage probability simultaneously, prolong food delivery robot's life, bring better use for the user and experience.
As shown in fig. 1 and fig. 2, the present embodiment further provides a shock absorber, which is applied to the meal delivery robot. The shock absorber comprises a first connecting part 1, a second connecting part 2, a hydraulic buffer 3 and a spring 4, wherein the hydraulic buffer 3 is arranged between the first connecting part 1 and the second connecting part 2, and the spring 4 is sleeved on the hydraulic buffer 3; the hydraulic buffer 3 comprises a cylinder 31, a hydraulic rod 32, a sliding seat 33 and a damping adjusting sheet 34, wherein the cylinder 31 is connected with the first connecting part 1; the hydraulic lever 32 is connected to the second connecting portion 2. The slider 33 is disposed in the cylinder 31, and the slider 33 is connected to the hydraulic rod 32 and can slide in the cylinder 31 along with the hydraulic rod 32. The damping adjusting sheet 34 is positioned between the sliding seat 33 and the hydraulic rod 32, and the damping adjusting sheet 34 can be attached to or separated from the end surface of the sliding seat 33; when the damping adjustment piece 34 is separated from the end surface of the sliding seat 33, the flow rate of the hydraulic oil is larger than that when the damping adjustment piece 34 is attached to the end surface of the sliding seat 33.
The flow rate of a liquid is defined as the mass of fluid passing through a cross-section of a pipe per unit time, i.e. Q-m/t. Because the mass, density and volume of the fluid are related by m ═ ρ V, and the volume V ═ sl, where s is the cross-sectional area of the flow tube, i.e. the bottom area of the liquid column, and l is the length of the liquid column, Q ═ m/t ═ ρ sl/t, and l/t is exactly the velocity V of the fluid flowing through the cross-section, Q ═ ρ sv. The density ρ is a constant for the same fluid, and thus, the flow rate of the fluid is proportional to the magnitude of the flow velocity when the cross-sectional area is the same.
As an alternative of the shock absorber, a first working chamber is formed between the sliding seat 33 and the first connecting portion 1, a central fixing seat 35 is arranged at one end, away from the first connecting portion 1, of the cylinder body 31, a second working chamber is formed between the central fixing seat 35 and the sliding seat 33, and the flow rate of hydraulic oil entering the second working chamber from the first working chamber when the damping adjusting sheet 34 is separated from the end face of the sliding seat 33 is larger than the flow rate of hydraulic oil entering the first working chamber from the second working chamber when the damping adjusting sheet 34 is attached to the end face of the sliding seat 33.
The cross-sectional area of the first working chamber is greater than the cross-sectional area of the second working chamber due to the presence of hydraulic rod 32 in the second working chamber. Under the condition that the flow of the hydraulic oil that gets into the second working chamber at first working chamber is greater than the flow of the hydraulic oil that the second working chamber got into first working chamber, the sectional area of second working chamber is still little than the sectional area of first working chamber, consequently, the velocity of flow of the hydraulic oil that gets into the second working chamber from first working chamber when damping adjustment sheet 34 and the terminal surface separation of slide 33 is far greater than the velocity of flow of the hydraulic oil that the second working chamber got into first working chamber when damping adjustment sheet 34 and the terminal surface laminating of slide 33, make hydraulic stem 32 can extrude hydraulic oil fast, in time absorb the vibrations that the impact produced.
Illustratively, the shock absorber is arranged between the driving wheel and the rear universal wheel, the first connecting part 1 is used for connecting with the rear universal wheel of the meal delivery robot, and the second connecting part 2 is used for connecting with the driving wheel of the meal delivery robot.
When the meal delivery robot runs on a horizontal road surface, the damping adjusting sheet 34 is attached to the end surface of the sliding seat 33. When the obstacle surmounting device is in obstacle crossing, the shock absorber is subjected to impact force, the hydraulic rod 32 is subjected to the impact force and inclines upwards to enable the damping adjusting sheet 34 to be separated from the end face of the sliding seat 33, the hydraulic rod 32 can rapidly extrude hydraulic oil, shock generated by impact can be absorbed timely, and stable operation of the rear universal wheel can be guaranteed; meanwhile, the spring 4 is compressed, and after the obstacle is crossed, the damping adjusting sheet 34 can be attached to the end face of the sliding seat 33 under the action of hydraulic oil, so that the hydraulic rod 32 can be smoothly restored to be horizontal, and the rear universal wheel can be further ensured to stably run.
In the process, as the flow of the hydraulic oil after the damping adjusting sheet 34 is separated from the end face of the sliding seat 33 is larger than the flow of the hydraulic oil when the damping adjusting sheet 34 is attached to the end face of the sliding seat 33, the flow of the hydraulic oil when the damping adjusting sheet 34 is separated from the end face of the sliding seat 33 is larger, the formed hydraulic damping is smaller, and the hydraulic rod 32 can rapidly extrude the hydraulic oil and timely absorb the shock generated by impact. After the damping adjusting sheet 34 is attached to the end surface of the sliding seat 33, the flow of hydraulic oil is reduced, and the formed hydraulic damping is larger; therefore, the spring 4 can be slowly restored to the state before obstacle crossing, and the impact force on the rear universal wheel can be reduced.
First connecting portion 1 is connected with the rear universal wheel through first support, and second connecting portion 2 is connected with the drive wheel through the second support. First support and second support all set up to the U-shaped, the bottom and the rear universal wheel fixed connection of the first support of U-shaped, the bottom and the drive wheel fixed connection of the second support of U-shaped. First connecting portion 1 and second connecting portion 2 all are provided with the through-hole, and after first pivot passed the through-hole of first connecting portion 1, the both ends of first pivot respectively with the both sides wall fixed connection of first support, first connecting portion 1 can rotate first pivot relatively. After the second rotating shaft passes through the through hole of the second connecting part 2, two ends of the second rotating shaft are respectively fixedly connected with two side walls of the second support, and the second connecting part 2 can rotate relative to the second rotating shaft.
As an alternative of the shock absorber, the shock absorber further includes a first spring seat 6 and a second spring seat 7, the first spring seat 6 is disposed at one end close to the first connecting portion 1, the second spring seat 7 is disposed at one end close to the second connecting portion 2, one end of the spring 4 is connected to the first spring seat 6, and the other end is connected to the second spring seat 7.
In the present embodiment, the first spring seat 6 is provided on the cylinder 31 and is fixedly connected to the cylinder 31. The hydraulic rod 32 is fixedly connected with the second connecting portion 2, and the second spring seat 7 is sleeved on the hydraulic rod 32 and is fixedly connected with the second connecting portion 2. Two ends of the spring 4 are respectively connected with a first spring seat 6 and a second spring seat 7, and the connection can be abutting connection or fixed connection; or one end of the spring 4 is abutted against the first spring seat 6, and the other end of the spring is fixedly connected with the second spring seat 7; or one end of the spring 4 is fixedly connected with the first spring seat 6, and the other end is abutted against the second spring seat 7.
As an alternative of the shock absorber, one end of the cylinder 31 near the first connecting portion 1 is provided with a first external thread 311, and the first spring seat 6 is provided with a first internal thread which is engaged with the first external thread 311 to be able to adjust the position of the first spring seat 6. Through with first spring holder 6 and cylinder body 31 threaded connection, can change the position of first spring holder 6 to adapt to the spring 4 of different flexible volume, with the food delivery robot of the interval difference between adaptation drive wheel and the back universal wheel, make the commonality of shock absorber better.
One end that first connecting portion 1 is connected with cylinder body 31 is provided with the shoulder hole, and the shoulder hole includes first hole, second hole and third hole, and the first hole sets up in the one end that is close to cylinder body 31, and the third hole sets up in the one end of keeping away from cylinder body 31, and the second hole sets up between first hole and third hole. The diameter in first hole is greater than the diameter in second hole, and the diameter in second hole is greater than the diameter in third hole, and first hole sets up to second internal thread hole, and cylinder body 31 is fixed with second screw hole spiro union.
As an alternative of the shock absorber, a rubber pad 5 is disposed at one end of the cylinder 31 close to the first connecting portion 1, the first working chamber is formed between the sliding base 33 and the rubber pad 5, and an air chamber is formed between the rubber pad 5 and the first connecting portion 1. In this embodiment, the rubber pad 5 is disposed between the end surface of the cylinder block 1 and the bottom of the second hole, and an air chamber is formed between the bottom of the third hole and the rubber pad 5. The rubber pad 5 is arranged to be used for sealing one end of the cylinder 31 connected with the first connecting part 1; on the other hand, an air cavity is formed between the bottom of the third hole and the rubber pad 5, so that the impact of the sliding seat 33 on the first connecting part 1 can be buffered, and the shock absorption effect of the shock absorber can be better realized. When the hydraulic oil of second working chamber flowed to first working chamber, rubber pad 5 received the pressure deformation of hydraulic oil, and to the direction protrusion that is close to the air cavity, avoided hydraulic oil direct action at first connecting portion 1, caused the damage to first connecting portion 1. When the hydraulic oil of first working chamber flowed into the second working chamber, the pressure in the gas chamber reduced, and rubber pad 5 is protruding to the direction of first working chamber under the negative pressure effect, is used in the hydraulic oil of first working chamber on, more is favorable to hydraulic stem 32 to extrude hydraulic oil fast, in time absorbs the vibrations that the impact produced.
The central fixing seat 35 comprises a butting portion and a connecting portion, the outer diameter of the butting portion is larger than that of the connecting portion, second external threads are arranged on the periphery of the connecting portion, a second internal thread is arranged at one end, connected with the central fixing seat 35, of the cylinder body 31, and the second external threads are matched with the second internal threads to fixedly connect the central fixing seat 35 with the cylinder body 31. The center of the central fixed seat 35 is provided with a through hole for the liquid pressure rod 32 to pass through.
An oil seal 36 and a plastic gasket 37 are further arranged in the cylinder body 31, the oil seal 36 is arranged on one side of the central fixed seat 35 close to the sliding seat 33, the plastic gasket 37 is arranged between the oil seal 36 and the central fixed seat 35, and the oil seal 36 and the plastic gasket 37 are both sleeved on the hydraulic rod 32. The sealing performance of the hydraulic oil in the cylinder 31 is ensured by the oil seal 36, and the plastic gasket 37 has a secondary sealing function. The oil seal 36 is made of rubber, and has good sealing performance; the hardness of the plastic gasket 37 is higher than that of the oil seal 36, and the plastic gasket is not easy to damage.
The inner wall of the cylinder body 31 is provided with a first positioning hole and a second positioning hole, the diameter of the first positioning hole is larger than that of the second positioning hole, the oil seal 36 is arranged in the second positioning hole, and the plastic gasket 37 is arranged in the first positioning hole.
As an alternative to the shock absorber, as shown in fig. 2-5, in the circumferential direction, the sliding seat 33 is provided with first damping holes 331 at intervals, the damping adjustment piece 34 is provided with second damping holes 341 and third damping holes 342 at intervals, the first damping holes 331 are opposite to the second damping holes 341, and the diameter of the first damping holes 331 is larger than that of the second damping holes 341; when the damping adjusting sheet 34 is separated from the end surface of the sliding seat 33, the hydraulic oil in the first working chamber enters the second working chamber through the first damping hole 331, the second damping hole 341 and the third damping hole 342; when the damping adjusting piece 34 is attached to the end surface of the sliding base 33, the hydraulic oil in the second working chamber enters the first working chamber through the second damping hole 341 and the first damping hole 331.
Since the slide 33 and the damper adjustment piece 34 are provided coaxially with the cylinder 31, the above-described circumferential direction may be the circumferential direction of the slide 33, the circumferential direction of the damper adjustment piece 34, the circumferential direction of the cylinder 31, the circumferential direction of the hydraulic shock absorber 3, or the circumferential direction of the shock absorber.
In this embodiment, when the hydraulic oil flows from the first working chamber to the second working chamber, the damping adjusting sheet 34 is separated from the end surface of the sliding base 33, the hydraulic oil in the first working chamber enters between the sliding base 33 and the damping adjusting sheet 34 through the first damping hole 331, and the hydraulic oil entering between the sliding base 33 and the damping adjusting sheet 34 through the first damping hole 331 flows into the second working chamber through the second damping hole 341 and the third damping hole 342; when the hydraulic oil flows from the second working chamber to the first working chamber, the damping adjusting sheet 34 is attached to the end surface of the sliding base 33, and the hydraulic oil in the second working chamber can only pass through the second damping hole 341 opposite to the first damping hole 331, then enter the first damping hole 331, and finally enter the first working chamber. That is, the flow area of the hydraulic oil when the hydraulic oil enters the first working chamber from the second working chamber is smaller than the flow area of the hydraulic oil when the hydraulic oil enters the second working chamber from the first working chamber, so that the flow rate of the hydraulic oil entering the second working chamber from the first working chamber is larger than the flow rate of the hydraulic oil entering the first working chamber from the second working chamber.
A sealing ring 38 is provided between the slide 33 and the inner wall of the cylinder 31 to ensure the sealing between the first working chamber and the second working chamber. A groove 333 is provided on the outer periphery of the slider 33, and the seal ring 38 is provided in the groove 333.
In the present embodiment, four first damping holes 331, four second damping holes 341, and four third damping holes 342 are provided, and the diameter of the third damping holes 342 is the same as that of the first damping holes 331. Of course, in other embodiments, the diameter of the third damping hole 342 is not limited, and only needs to be sufficient to slow down the compression of the spring 4 for the buffering function.
When the food delivery robot gets over obstacles, the shock absorber is subjected to impact force, the hydraulic rod 32 is subjected to impact force and inclines upwards, so that the end face of the sliding seat 33 is separated from the damping adjusting sheet 34, hydraulic oil in the first working cavity flows out through the four first damping holes 331 and then flows into the second working cavity through the four second damping holes 341 and the four third damping holes 342, at the moment, the flow of the hydraulic oil flowing into the second working cavity from the first working cavity is large, the hydraulic rod 32 can rapidly extrude the hydraulic oil, the shock generated by impact is absorbed in time, and the rear universal wheel can be ensured to operate stably; at the same time, the spring 4 is compressed; after crossing the obstacle, damping adjustment sheet 34 can be laminated with the terminal surface of slide 33 under the effect of hydraulic oil, and the hydraulic oil of second working chamber can only get into four first damping holes 331 through four second damping holes 341 and flow to first working chamber, and the flow of hydraulic oil is less for hydraulic stem 32 can resume to the level smoothly, further guarantees that the back universal wheel can operate steadily. In the process, because the flow of the hydraulic oil after the damping adjustment sheet 34 is separated from the end face of the slide seat 33 is larger than the flow of the hydraulic oil when the damping adjustment sheet 34 is attached to the end face of the slide seat 33, the flow of the hydraulic oil when the damping adjustment sheet 34 is separated from the end face of the slide seat 33 is larger, the formed hydraulic damping is smaller, and the hydraulic rod 32 can rapidly extrude the hydraulic oil and timely absorb the shock generated by the impact. After the damping adjusting sheet 34 is attached to the end surface of the sliding seat 33, the flow of hydraulic oil is reduced, and the formed hydraulic damping is larger; therefore, the spring 4 can be slowly restored to the state before obstacle crossing, and the impact force on the rear universal wheel can be reduced.
As an alternative of the shock absorber, the second damping holes 341 and the third damping holes 342 are arranged on the same circumference line in the circumferential direction of the damping adjustment sheet 34, and the second damping holes 341 and the third damping holes 342 are alternately arranged. The arrangement is such that the path of the hydraulic oil in the first working chamber after passing through the first orifice 331, flowing into the second orifice 341 and the third orifice 342, is shortest. Of course, in other embodiments, the second damping holes 341 and the third damping holes 342 may be arranged on the circumference lines of different diameters.
In another optional embodiment of the present invention, damping holes may also be disposed on two circumferential lines of different diameters along the circumferential direction of the sliding seat 33, the diameter of the damping adjustment sheet 34 is smaller than the diameter of the sliding seat 33, and when the damping adjustment sheet 34 is attached to the end surface of the sliding seat 33, the damping adjustment sheet 34 can only cover the damping holes on the circumferential line of smaller diameter; when the damping adjusting piece 34 is separated from the end surface of the sliding seat 33, the hydraulic oil in the first working cavity can enter the second working cavity through the damping holes on the circumference lines with two different diameters and the gap between the damping adjusting piece 34 and the inner wall of the cylinder body 31; when the damping adjusting piece 34 is engaged with the end face of the sliding seat 33, the hydraulic oil in the second working chamber can only enter the first working chamber through the damping hole on the circumferential line with the larger diameter. Due to the arrangement, the flow of the hydraulic oil entering the second working cavity from the first working cavity when the damping adjusting sheet 34 is separated from the end face of the sliding seat 33 can be larger than the flow of the hydraulic oil entering the first working cavity from the second working cavity when the damping adjusting sheet 34 is attached to the end face of the sliding seat 33, and therefore the impact force on the rear universal wheel can be reduced.
As an alternative of the shock absorber, the sliding base 33 further includes a connecting shaft 332, the damping adjustment piece 34 is further provided with a first connecting hole, the connecting shaft 332 passes through the first connecting hole to be connected with the hydraulic rod 32, the hydraulic rod 32 has an outer diameter larger than an inner diameter of the first connecting hole, and the damping adjustment piece 34 can move between the sliding base 33 and the hydraulic rod 32. So that the flow rate of the hydraulic oil entering the second working chamber from the first working chamber is increased after the damping adjustment piece 34 is separated from the end surface of the slide seat 33.
As an alternative of the shock absorber, a second connection hole 3322 is provided in the connection shaft 332 and communicates with both ends of the slider 33, a first threaded hole 321 is provided at one end of the hydraulic rod 32 connected to the connection shaft 332, and a fastening screw passes through the second connection hole 3322 and is screwed with the first threaded hole 321 to fixedly connect the connection shaft 332 and the hydraulic rod 32.
In order to ensure the stability of the connection of the connecting shaft 332 and the hydraulic rod 32, the first threaded hole 321 on the hydraulic rod 32 is configured as a countersunk hole, so that the connecting shaft 332 can partially extend into the countersunk hole.
As an alternative of the shock absorber, the connecting shaft 332 is provided with a limiting surface 3321, the first connecting hole is provided as a limiting hole 343, and the limiting hole 343 is engaged with the connecting shaft 332 having the limiting surface 3321 to limit the rotation of the damping adjustment piece 34. Due to the arrangement, after the shock absorber is impacted, the damping adjusting sheet 34 can only move and separate between the sliding seat 33 and the hydraulic rod 32, and cannot rotate in the moving process, so that the situation that the first damping hole 331 and the second damping hole 341 cannot be aligned, hydraulic oil in the first working cavity cannot enter the second working cavity, and the spring 4 cannot reset is avoided.
In the present embodiment, two limiting surfaces 3321 are oppositely disposed on the periphery of the connecting shaft 332. Of course, in other embodiments, only one limiting surface 3321 may be disposed on the periphery of the connecting shaft 332.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (10)
1. A shock absorber is characterized by comprising a first connecting part, a second connecting part, a hydraulic buffer and a spring, wherein the hydraulic buffer is arranged between the first connecting part and the second connecting part, and the spring is sleeved on the hydraulic buffer; the hydraulic shock absorber includes:
a cylinder connected to the first connection part;
the hydraulic rod is connected with the second connecting part;
the sliding seat is arranged in the cylinder body, is connected with the hydraulic rod and can slide in the cylinder body along with the hydraulic rod;
the damping adjusting sheet is positioned between the sliding seat and the hydraulic rod and can be attached to or separated from the end face of the sliding seat;
the flow of hydraulic oil is greater than when the damping adjustment piece with the terminal surface separation of slide the flow of hydraulic oil is greater than when the damping adjustment piece with the terminal surface laminating of slide.
2. The shock absorber according to claim 1, wherein a first working chamber is formed between said sliding base and said first connecting portion, a central fixing base is disposed at an end of said cylinder body away from said first connecting portion, a second working chamber is formed between said central fixing base and said sliding base, and a flow rate of hydraulic oil entering said second working chamber from said first working chamber when said damping adjustment piece is separated from an end surface of said sliding base is greater than a flow rate of hydraulic oil entering said first working chamber from said second working chamber when said damping adjustment piece is attached to an end surface of said sliding base.
3. The shock absorber according to claim 2, wherein first damping holes are formed in the sliding base at intervals in the circumferential direction, second damping holes and third damping holes are formed in the damping adjusting plate at intervals, the first damping holes are opposite to the second damping holes, and the diameter of each first damping hole is larger than that of each second damping hole; when the damping adjusting sheet is separated from the end face of the sliding seat, hydraulic oil in the first working cavity enters the second working cavity through the first damping hole, the second damping hole and the third damping hole; when the damping adjustment sheet is attached to the end face of the sliding seat, hydraulic oil of the second working cavity enters the first working cavity through the second damping hole and the first damping hole.
4. A shock absorber according to claim 3, wherein the sliding base further comprises a connecting shaft, the damping adjustment piece is further provided with a first connecting hole, the connecting shaft passes through the first connecting hole to be connected with the hydraulic rod, the hydraulic rod has an outer diameter larger than an inner diameter of the first connecting hole, and the damping adjustment piece can move between the sliding base and the hydraulic rod.
5. A shock absorber according to claim 4, wherein the connecting shaft is provided with a limiting surface, the first connecting hole is provided as a limiting hole, and the limiting hole is matched with the connecting shaft with the limiting surface to limit the rotation of the damping adjustment sheet.
6. A shock absorber according to claim 3, wherein said second damping holes and said third damping holes are arranged on the same circumference along the circumferential direction of said damping adjustment piece, and said second damping holes and said third damping holes are arranged alternately.
7. The shock absorber according to claim 2, wherein, along the circumference of the sliding seat, damping holes are formed on two circumferences with different diameters, the diameter of the damping adjusting piece is smaller than that of the sliding seat, and when the damping adjusting piece is attached to the end surface of the sliding seat, the damping adjusting piece can only cover the damping holes on the circumference with the smaller diameter; when the damping adjusting sheet is separated from the end face of the sliding seat, hydraulic oil in the first working cavity can enter the second working cavity through the damping holes in the circumferential lines with different diameters and a gap between the damping adjusting sheet and the inner wall of the cylinder body; when the damping adjusting sheet is attached to the end face of the sliding seat, hydraulic oil of the second working cavity can only enter the first working cavity through the damping holes in the circumferential line with the larger diameter.
8. A shock absorber according to any one of claims 1-7, wherein the shock absorber further comprises a first spring seat and a second spring seat, the first spring seat is disposed at one end close to the first connecting portion, the second spring seat is disposed at one end close to the second connecting portion, one end of the spring is connected with the first spring seat, the other end of the spring is connected with the second spring seat, one end of the cylinder body close to the first connecting portion is provided with a first external thread, the first spring seat is provided with a first internal thread, and the first internal thread is matched with the first external thread to adjust the position of the first spring seat.
9. A shock absorber according to claim 2, wherein a rubber pad is provided at an end of the cylinder body adjacent to the first connecting portion, the first working chamber is formed between the sliding base and the rubber pad, and an air chamber is formed between the rubber pad and the first connecting portion.
10. A food delivery robot, characterized by, including chassis, drive wheel and universal wheel, the drive wheel set up in the intermediate position on chassis, the universal wheel set up in food delivery robot walking direction's rear or the place ahead, drive wheel with set up the shock absorber of any one of claims 1-9 between the universal wheel, first connecting portion with the universal wheel is connected, second connecting portion with the drive wheel is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221094655.6U CN217301402U (en) | 2022-05-09 | 2022-05-09 | Shock absorber and food delivery robot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221094655.6U CN217301402U (en) | 2022-05-09 | 2022-05-09 | Shock absorber and food delivery robot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217301402U true CN217301402U (en) | 2022-08-26 |
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ID=82917073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221094655.6U Active CN217301402U (en) | 2022-05-09 | 2022-05-09 | Shock absorber and food delivery robot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217301402U (en) |
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2022
- 2022-05-09 CN CN202221094655.6U patent/CN217301402U/en active Active
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