Service robot with height-adjustable storage mechanism

By introducing a height-adjustable storage mechanism into the service robot, the problem of fixed pallet height is solved by using lifting components and installation components, and the flexible adjustment and rapid disassembly and assembly of the pallet are achieved, thereby improving the ease of use and maintenance efficiency of the equipment.

CN223354277UActive Publication Date: 2025-09-19BEIJING FUYOUHUA INTELLIGENT TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202520026817.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-07
Publication Date
2025-09-19
Estimated Expiration
2035-01-07

AI Technical Summary

Technical Problem

The tray structure of existing service robots cannot be adjusted in height, which makes it inconvenient to serve guests of different heights. In addition, the disassembly and assembly process is cumbersome, affecting the convenience of use and maintenance efficiency.

Method used

A height-adjustable storage mechanism is designed, which realizes flexible height adjustment of the tray assembly through the lifting assembly and the installation assembly, and adopts the cooperation of the driving motor and the screw rod, combined with the limit parts and the clamping structure, to realize the rapid disassembly and assembly of the tray.

Benefits of technology

It enables flexible adjustment of the pallet height, improves the convenience of the service robot in different scenarios, simplifies the installation and removal process of the pallet, and improves the maintenance efficiency and ease of use of the equipment.

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Abstract

The embodiment of the utility model provides a service robot with a height-adjustable storage mechanism, and relates to the technical field of service robots, the service robot comprises a robot base, a laser radar is fixedly mounted on one side of the robot base, and the storage mechanism is fixedly mounted on the side, away from the laser radar, of the top of the robot base; according to the device, the storage mechanism is arranged, when the device is used, a driving motor is started to drive a lead screw to rotate in a sliding groove, then a movable block is assisted to slide up and down in the sliding groove, and therefore the tray assembly is flexibly adjusted to move up and down, and the tray assembly is provided with tray bodies at equal intervals in a bracket; the multi-layer structure can better store articles, the overall use convenience of the device is improved, the height adjusting function is achieved through cooperation of a driving motor and a lead screw, the requirements of different use scenes are met, the service robot is more flexible and efficient in article storage and taking, and better service experience is provided for a user.
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Description

Technical Field

[0001] The present application relates to the technical field of service robots, and in particular to a service robot with a height-adjustable storage mechanism. Background Art

[0002] A service robot is an intelligent device that is primarily used to provide various assistance and services to humans in non-industrial environments. It can function in a variety of scenarios, such as homes, hospitals, shopping malls, and hotels. At home, it can complete tasks such as cleaning the floor and accompanying family members. In hospitals, service robots can assist medical staff in transporting medical supplies and guiding patients. In commercial places, it can perform tasks such as welcoming guests and providing shopping guides. Service robots use sensors to perceive the environment, and perform operations such as path planning and task decision-making through algorithms and programs. They also use communication modules and human-computer interaction interfaces to receive instructions and provide feedback, thereby effectively providing humans with efficient, convenient, and accurate services, making people's lives and work more convenient.

[0003] The existing technology is equipped with a laser radar, multiple bracket trays, and cameras to improve the placement rate of dishes and chopsticks. The laser radar can detect obstacles in the service robot's path when it moves, avoiding collisions between the service robot and obstacles, thereby improving the service efficiency and quality of the service robot. The first and second driving wheels and shock absorbers are provided to achieve the functions of forward, backward, and left and right turns by controlling the speed difference between the two wheel hub motors. The shock absorbers can effectively reduce the vibrations to which the service robot is subjected during movement.

[0004] Although the above-mentioned device has certain conveniences during actual use, it also has some shortcomings. During use, each tray is fixedly installed inside the tray bracket of the robot. Usually, the service robot needs to provide services to various guests. However, in the current design, the tray structure cannot be adjusted in height. As a result, it will be inconvenient when serving guests of different heights. For example, when serving taller guests, the guests may need to bend down to pick up items on the tray; when serving shorter guests, the tray may be difficult to reach because the position of the tray is too high. In addition, the tray structure is fixedly installed in the bracket of the robot, which will cause great trouble when the tray needs to be cleaned or replaced. The disassembly and assembly process is cumbersome and inconvenient, and may require the use of specific tools or take a long time to complete. In summary, in order to improve the practicality and convenience of the service robot, its tray structure needs to be improved. Utility Model Content

[0005] An embodiment of the present application provides a service robot with a height-adjustable storage mechanism, which is used to solve the problem that current service robots are inconvenient to adjust the height of the tray and to quickly disassemble and clean the tray.

[0006] An embodiment of the present application provides a service robot with a height-adjustable storage mechanism, comprising: a robot base, a laser radar fixedly mounted on one side of the robot base, a storage mechanism fixedly mounted on a top side of the robot base away from the laser radar, a control box fixedly mounted on the top of the storage mechanism, a camera provided on an upper end of the control box on a side close to the laser radar, and a display screen fixedly mounted on a middle portion of a side of the control box close to the laser radar;

[0007] The laser radar, the camera and the display screen are all electrically connected to the controller in the control box;

[0008] The storage mechanism includes a frame, which is fixedly installed on the top end of the robot base away from the laser radar. The top of the frame is fixedly connected to the bottom of the control box. A lifting assembly is installed on one side of the interior of the frame. An installation assembly is provided on the lifting assembly, and a tray assembly is installed on the lifting assembly through the installation assembly.

[0009] In a feasible implementation, the lifting assembly includes a slide groove, which is opened on one side of the frame, and a drive motor is fixedly installed at the bottom of the slide groove. The output end of the drive motor is fixedly connected to a screw rod, and the screw rod is rotatably connected to the inside of the slide groove. The outer surface of the screw rod is threadedly connected to a movable block, and the movable block slides inside the slide groove.

[0010] In a feasible implementation, the overall internal cross-sectional shape of the slide groove is set to be a convex shape, the top view shape of the movable block is also set to be a convex shape, the outer surface of the movable block is fixedly connected with a wear-resistant gasket, the top two sides of the robot base are fixedly connected with a support shaft, and the two sides of the tray assembly are fixedly connected with a support frame, and the support frame and the support shaft are slidably connected to each other.

[0011] In a feasible implementation, the mounting assembly includes a connecting arm, which is fixedly connected to the inner side of the movable block, and a base plate is fixedly mounted on the outer end of the connecting arm. A limit piece is provided at the bottom of the base plate, and movable grooves are provided on both sides of the top front end of the base plate. The two sides of the bottom of the tray assembly are slidably connected to the inside of the movable groove.

[0012] In a feasible implementation, the limiting member includes a fixed arm and a card slot, the fixed arm is fixedly connected to the side of the bottom of the base plate close to the connecting arm, both ends of the fixed arm are fixedly connected to the limiting spring, the top of the limiting spring is fixedly connected with a card block, the card slot is opened on the side of the lower end of the tray assembly close to the connecting arm, and the top of the card block passes through the base plate and is inserted into the inside of the card slot.

[0013] In a feasible implementation, the tray assembly includes a slide, which is slidably connected to the inside of the movable groove, and a bracket is fixedly installed on the top of the slide. The inner side of the bracket is fixedly connected with a tray body arranged linearly at equal intervals. A fixing plate is integrally formed on the side of the tray body located at the bottom close to the connecting arm, the card slot is opened in the middle of the fixing plate, and the support frame is fixedly connected to both sides of the bracket.

[0014] In a feasible implementation, the bottom of the clamping block is fixedly connected to a connecting shaft, the bottom of the connecting shaft passes through the fixed arm and is fixedly connected to a pull ring, and a guide slope is provided on one side of the upper end of the clamping block close to the fixed plate.

[0015] The embodiment of the present application provides a service robot with a height-adjustable storage mechanism, which is provided with a storage mechanism. When in use, starting a drive motor can drive a screw rod to rotate in a slide groove, thereby assisting a movable block to slide up and down in the slide groove, thereby flexibly adjusting the up and down displacement of a tray assembly. The tray assembly is equipped with tray bodies at equal intervals in a bracket. The multi-layer structure can better store items, improving the overall convenience of the device. The cooperation of the drive motor and the screw rod realizes the height adjustment function, meeting the needs of different usage scenarios, making the service robot more flexible and efficient in storing and taking items, and providing users with a better service experience.

[0016] In addition, when installing the tray assembly, the installation component of this device can insert the slide into the slide groove. After the fixed plate contacts the guide inclined surface of the card block, the card block is compressed to shrink the limit spring. After the fixed plate moves to the top of the card block, the limit spring resets, and the card block is inserted into the card slot to achieve card connection and fixation. When removing, pull the pull ring to drive the connecting shaft to move the card block down and out of the card slot, and then the slide plate can be pulled out. This installation component is convenient for quick disassembly and assembly of the tray assembly, and is easy to inspect, clean, replace and maintain, which improves the overall use convenience of the device, reduces equipment maintenance time and cost, makes the maintenance of the service robot more efficient, and ensures that it is always in good working condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation on the present invention.

[0018] In the attached figure:

[0019] Figure 1 This is a first overall structural diagram of a service robot provided by an embodiment of the present application;

[0020] Figure 2 2 is a second structural diagram of the service robot provided by an embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of the structure of a tray assembly and an installation assembly provided in one embodiment of the present application;

[0022] Figure 4 This application provides an embodiment Figure 3 A is an enlarged structural diagram of FIG.

[0023] Description of reference numerals:

[0024] 100-Robot base; 200-LiDAR; 300-Display screen; 400-Control box; 500-Camera; 600-Storage mechanism;

[0025] 610-frame; 620-lifting assembly; 630-installation assembly; 640-tray assembly; 650-support shaft; 660-support frame;

[0026] 621- slide; 622- drive motor; 623- screw rod; 624- movable block;

[0027] 631-connecting arm; 632-base plate; 633-limiting member; 634-movable slot;

[0028] 6331-Fixed arm; 6332-Card slot; 6333-Limit spring; 6334-Card block; 6335-Connecting shaft; 6336-Pull ring; 6337-Guide ramp;

[0029] 641-slide plate; 642-bracket; 643-tray body; 644-fixing plate. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will provide a clear and complete description of the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0031] Example

[0032] refer to Figures 1 to 4This embodiment of a service robot with a height-adjustable storage mechanism includes a robot base 100. A laser radar 200 is fixedly mounted on one side of the robot base 100, and a storage mechanism 600 is fixedly mounted on the top of the robot base 100, away from the laser radar 200. A control box 400 is fixedly mounted on the top of the storage mechanism 600. A camera 500 is provided on the upper end of the control box 400, near the laser radar 200. A display screen 300 is fixedly mounted in the middle of the control box 400, near the laser radar 200.

[0033] The laser radar 200, camera 500 and display screen 300 are all electrically connected to the controller in the control box 400. It should be noted that the electrical connection method and control technology of the laser radar 200, camera 500 and display screen 300 with the controller in the control box 400 are all existing technologies and will not be repeated again.

[0034] The storage mechanism 600 includes a frame 610, which is fixedly mounted on the top end of the robot base 100 away from the laser radar 200. The top of the frame 610 is fixedly connected to the bottom of the control box 400. A lifting assembly 620 is mounted on one side of the interior of the frame 610. A mounting assembly 630 is provided on the lifting assembly 620, and a tray assembly 640 is mounted on the lifting assembly 620 via the mounting assembly 630. The laser radar 200 on one side of the robot base 100 helps the robot accurately perceive its surroundings, enabling precise navigation and obstacle avoidance. The control box 400 at the top of the storage mechanism 600 houses a controller that controls devices such as the laser radar 200, the camera 500, and the display screen 300. The camera 500 can capture image information, allowing the robot to better identify targets and the environment, while the display screen 300 can display relevant information, enhancing human-machine interaction.

[0035] The frame 610 of the storage mechanism 600 is fixed to the top of the robot base 100, providing stable support for the entire tray system. The lifting assembly 620, in conjunction with the mounting assembly 630, allows for flexible adjustment of the height of the tray assembly 640, accommodating users of varying heights and enhancing service convenience. Furthermore, the mounting assembly 630 facilitates installation and removal of the tray assembly 640, facilitating inspection, cleaning, replacement, and maintenance, significantly enhancing the overall ease of use of the device.

[0036] The lifting assembly 620 includes a chute 621, which is located on one side of the frame 610. A drive motor 622 is fixedly mounted at the bottom of the chute 621. A screw 623 is fixedly connected to the output end of the drive motor 622, which is rotatably connected to the interior of the chute 621. A movable block 624 is threadedly connected to the outer surface of the screw 623, which slides within the chute 621. The chute 621 has a convex cross-sectional shape, and the movable block 624 also has a convex shape when viewed from above. Wear-resistant pads are fixedly attached to the outer surface of the movable block 624. Support shafts 650 are fixedly connected to both sides of the top of the robot base 100. Support frames 660 are fixedly connected to both sides of the tray assembly 640. The support frames 660 and the support shafts 650 are slidably connected to each other. The chute 621 is located on one side of the frame 610, providing a stable track for lifting operations.

[0037] The drive motor 622 at the bottom of the chute 621 provides power for the rotation of the screw rod 623. When the screw rod 623 connected to the output end of the drive motor 622 rotates in the chute 621, it can accurately control the up and down movement of the movable block 624 threaded thereon. The movable block 624 slides inside the chute 621, which is arranged in a convex shape, and its own top view shape is also a convex shape. This design makes the movable block 624 more stable during movement and not easy to shake or fall off the track. The wear-resistant gasket on the outer surface of the movable block 624 reduces the friction between the movable block 624 and the chute 621, thereby extending the service life of the equipment. The support shafts 650 on both sides of the top of the robot base 100 and the support frames 660 on both sides of the tray assembly 640 are slidably connected to each other, further enhancing the stability of the tray assembly 640 during the lifting process, ensuring that the tray can be adjusted smoothly when adjusting the height, and providing a reliable height adjustment function for the use of the service robot.

[0038] The mounting assembly 630 includes a connecting arm 631, which is fixedly connected to the inner side of the movable block 624. A base plate 632 is fixedly mounted on the outer end of the connecting arm 631. A limit piece 633 is provided at the bottom of the base plate 632, and movable grooves 634 are provided on both sides of the top front end of the base plate 632.

[0039] The bottom sides of the tray assembly 640 are slidably connected to the interior of the movable slot 634. The limiting member 633 includes a fixed arm 6331 and a clamping slot 6332. The fixed arm 6331 is fixedly connected to the bottom side of the base plate 632 near the connecting arm 631. The fixed arm 6331 is fixedly connected to the limiting spring 6333 at both ends. The top of the limiting spring 6333 is fixedly connected to the clamping block 6334. The clamping slot 6332 is located at the lower end of the tray assembly 640 near the connecting arm 631. The top of the clamping block 6334 penetrates the base plate 632 and is inserted into the clamping slot 6332. The connecting arm 631 connects the movable block 624 to the base plate 632, providing stable support for the tray assembly 640.

[0040] The limiting member 633 at the bottom of the base plate 632 cooperates with the movable slots 634 on both sides of the top front end to ensure a more stable installation of the tray assembly 640. When the two sides of the bottom of the tray assembly 640 slide and connect within the movable slots 634, they can ensure that the tray assembly 640 is in a stable horizontal position. The fixed arm 6331 in the limiting member 633 provides an installation position for the limiting spring 6333 and the clamping block 6334. The limiting spring 6333 can apply a certain elastic pressure to the clamping block 6334. When the top of the clamping block 6334 passes through the base plate 632 and is inserted into the clamping slot 6332, the tray assembly 640 is fixed in place, preventing the tray from accidentally falling off during use. This installation method is simple, reliable, and easy to operate. When the tray assembly 640 needs to be disassembled for cleaning or maintenance, it is only necessary to compress the limiting spring 6333 to disengage the clamping block 6334 from the clamping slot 6332, greatly improving the convenience of use of the device.

[0041] Tray assembly 640 includes a slide 641, which slides into position within movable slot 634. A bracket 642 is fixedly mounted on the top of slide 641, and a tray body 643 is fixedly attached to the inside of bracket 642 in a linear arrangement at equal intervals. A fixing plate 644 is integrally formed on the bottommost side of tray body 643, near connecting arm 631. A slot 6332 is located in the middle of fixing plate 644. Support frames 660 are fixedly attached to both sides of bracket 642. A coupling 6335 is fixedly attached to the bottom of the clamping block 6334. The bottom of the coupling 6335 passes through the fixing arm 6331 and is fixedly attached to a pull ring 6336. A guide ramp 6337 is provided on the upper end of the clamping block 6334, near the fixing plate 644. The slide 641 slides into position within movable slot 634, allowing for easy connection and removal of tray assembly 640 from mounting assembly 630, improving the maintainability of the equipment.

[0042] The bracket 642 on the top of the slide 641 provides a stable support for the tray body 643. The tray body 643 arranged linearly and fixedly connected at equal intervals can better classify and store items, thereby improving space utilization.

[0043] The fixing plate 644 on one side of the bottommost tray body 643 mates with the slot 6332, securing the tray assembly 640 via the stopper 633 of the mounting assembly 630, ensuring it does not wobble or fall off during use. The support brackets 660 on either side of the bracket 642 slide in contact with the support shaft 650 on the robot base 100, further enhancing the stability of the tray assembly 640 during lifting and lowering. The coupling shaft 6335 and pull ring 6336 at the bottom of the block 6334 facilitate removal of the tray assembly 640. Pulling the pull ring 6336 disengages the block 6334 from the slot 6332, enabling quick removal. The guide ramp 6337 on the top of the block 6334 guides the tray assembly 640 during installation, allowing the fixing plate 644 to smoothly push the block 6334 downward. The stopper spring 6333 then engages the block 6332, enhancing installation convenience.

[0044] The principle of use and advantages are as follows: when using this device, the drive motor 622 can be started to run. When the drive motor 622 is running, it can drive the screw rod 623 to rotate inside the slide 621. The drive motor 622 drives the screw rod 623 to rotate, and then assists in driving the movable block 624 to slide up and down inside the slide 621. By flexibly adjusting the upper and lower positions of the movable block 624, the height adjustment of the tray assembly 640 can be achieved. The tray assembly 640 adopts a design of installing the tray body 643 at equal intervals inside the bracket 642. During use, the multi-layer tray body 643 structure can better store items. This design not only increases the storage space for items, but also can adjust the height of the tray according to actual needs, further improving the overall ease of use of the device.

[0045] During use of this device, if the tray assembly 640 needs to be installed, the slide 641 can be inserted into the inner side of the slide groove 621. When the slide 641 is inserted into the slide groove 621, the fixed plate 644 contacts the guide bevel 6337 of the clamping block 6334. After the clamping block 6334 is squeezed, the guiding action of the guide bevel 6337 will cause the clamping block 6334 to squeeze the limit spring 6333 to contract. As the clamping block 6334 moves downward, the fixed plate 644 can smoothly move to the top of the clamping block 6334. At this time, the limit spring 6333 resets, pushing the clamping block 6334 upward. After moving upward, the clamping block 6334 is inserted into the inner side of the clamping groove 6332. The mutual limiting action between the clamping block 6334 and the clamping groove 6332 can assist in the clamping and installation of the fixed plate 644, thereby fixing the entire tray assembly 640. To remove the tray assembly 640, pull the ring 6336 downward to move the connecting shaft 6335. This downward movement of the connecting shaft 6335 pulls the block 6334 downward, disengaging it from the slot 6332. When the block 6334 and slot 6332 separate, the retaining function of the slot 6332 and the block 6334 is lost, allowing the slide 641 to be withdrawn from the inner side of the slide groove 621. This allows for quick and easy disassembly of the entire tray assembly 640 during use, facilitating inspection, cleaning, replacement, and maintenance, significantly enhancing the overall ease of use of the device.

[0046] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on the several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0047] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. A service robot with a height-adjustable storage mechanism, characterized in that: include: A robot base (100), wherein a laser radar (200) is fixedly mounted on one side of the robot base (100), a storage mechanism (600) is fixedly mounted on a side of the top of the robot base (100) away from the laser radar (200), a control box (400) is fixedly mounted on the top of the storage mechanism (600), a camera (500) is provided on the upper end of the side of the control box (400) close to the laser radar (200), and a display screen (300) is fixedly mounted on the middle part of the side of the control box (400) close to the laser radar (200); the laser radar (200), the camera (500) and the display screen (300) are all electrically connected to a controller in the control box (400); The storage mechanism (600) includes a frame (610), the frame (610) is fixedly mounted on one end of the top of the robot base (100) away from the laser radar (200), the top of the frame (610) is fixedly connected to the bottom of the control box (400), a lifting assembly (620) is mounted on one side of the interior of the frame (610), a mounting assembly (630) is provided on the lifting assembly (620), and a tray assembly (640) is mounted on the lifting assembly (620) via the mounting assembly (630).

2. The service robot with a height-adjustable storage mechanism according to claim 1, characterized in that: The lifting assembly (620) includes a slide groove (621), the slide groove (621) is opened on one side of the frame (610), a driving motor (622) is fixedly installed at the bottom of the slide groove (621), the output end of the driving motor (622) is fixedly connected to a screw rod (623), the screw rod (623) is rotatably connected to the inside of the slide groove (621), the outer surface of the screw rod (623) is threadedly connected to a movable block (624), and the movable block (624) slides inside the slide groove (621).

3. The service robot with a height-adjustable storage mechanism according to claim 2, characterized in that: The internal overall cross-sectional shape of the slide groove (621) is set in a convex shape, the top view shape of the movable block (624) is also set in a convex shape, the outer surface of the movable block (624) is fixedly connected with a wear-resistant gasket, the top two sides of the robot base (100) are fixedly connected with a support shaft (650), and the two sides of the tray assembly (640) are fixedly connected with a support frame (660), and the support frame (660) and the support shaft (650) are slidably connected to each other.

4. The service robot with a height-adjustable storage mechanism according to claim 3, characterized in that: The mounting assembly (630) includes a connecting arm (631), the connecting arm (631) is fixedly connected to the inner side of the movable block (624), a base plate (632) is fixedly mounted on the outer end of the connecting arm (631), a limiting member (633) is provided at the bottom of the base plate (632), movable grooves (634) are provided on both sides of the top front end of the base plate (632), and both sides of the bottom of the tray assembly (640) are slidably connected to the inside of the movable groove (634).

5. The service robot with a height-adjustable storage mechanism according to claim 4, characterized in that: The limiting member (633) includes a fixed arm (6331) and a card slot (6332), wherein the fixed arm (6331) is fixedly connected to the bottom of the base plate (632) on a side close to the connecting arm (631), and both ends of the fixed arm (6331) are fixedly connected to the limiting spring (6333), and the top of the limiting spring (6333) is fixedly connected to a card block (6334), and the card slot (6332) is opened on the lower end of the tray assembly (640) on a side close to the connecting arm (631), and the top of the card block (6334) passes through the base plate (632) and is inserted into the inside of the card slot (6332).

6. The service robot with a height-adjustable storage mechanism according to claim 5, characterized in that: The tray assembly (640) includes a slide plate (641), the slide plate (641) is slidably connected to the inside of the movable groove (634), a bracket (642) is fixedly installed on the top of the slide plate (641), and the inner side of the bracket (642) is fixedly connected with a tray body (643) arranged linearly at equal intervals. A fixing plate (644) is integrally formed on one side of the tray body (643) located at the bottom close to the connecting arm (631), the slot (6332) is opened in the middle of the fixing plate (644), and the supporting frame (660) is fixedly connected to both sides of the bracket (642).

7. The service robot with a height-adjustable storage mechanism according to claim 6, characterized in that: The bottom of the clamping block (6334) is fixedly connected to a connecting shaft (6335), and the bottom of the connecting shaft (6335) passes through the fixed arm (6331) and is fixedly connected to a pull ring (6336). A guide slope (6337) is provided on one side of the upper end of the clamping block (6334) close to the fixed plate (644).