Lifting device for trolley

Abstract

The utility model discloses a lifting device for a trolley, which belongs to the technical field of trolley lifting devices and comprises a lifting platform, two symmetrically distributed sliders are fixedly mounted on the back of the lifting platform and positioned inside guide rails, a transmission lead screw is mounted on one of the guide rails, and a transmission lead screw is mounted on the other of the guide rails. The transmission lead screw is installed on the sliding block in a penetrating mode, and the upper end of the transmission lead screw is fixed to the output end of the servo motor. Scrapers are fixedly installed at the upper end and the lower end of the sliding block, a temperature sensing component for monitoring the temperature in the guide rail is embedded in the middle of the sliding block, and a transfer groove is formed in the lifting platform. According to the lifting device for the trolley, dust and impurities in the track can be conveniently scraped and cleaned in the lifting process, the cleanliness of the interior of the track is guaranteed, meanwhile, after friction resistance in the track is large, the interior of the track is automatically lubricated, and it is avoided that the lifting device suffers from large friction resistance for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of trolley lifting devices, in particular to a trolley lifting device. Background Art

[0002] The trolley is a tool used for pouring secondary lining concrete for tunnels and diversion tunnels. The trolley is usually composed of a gantry and a formwork. When the trolley is in use, workers usually climb up to the top of the trolley by climbing a steel ladder, which is rather cumbersome. Therefore, in order to facilitate the workers to work on the trolley, a lifting device is usually installed on the trolley to assist the workers in climbing to the top of the trolley.

[0003] For example, a lifting device for a trolley with publication number CN216110758U includes a trolley body, a lifting platform is arranged on one side of the support frame of the trolley body, a lifting component for lifting the lifting platform is arranged on the trolley body, and a protective component is arranged on the lifting platform.

[0004] The above-mentioned prior art has the following technical problems: the existing trolley lifting device lifts its lifting platform through the lifting assembly during use, but it is not convenient to clean the dust and impurities inside the lifting track during the lifting process. Because the trolley is working inside the tunnel, some dust is easy to enter the track. As the dust and impurities inside the track increase, it is easy to increase the resistance of the lifting device during lifting. At the same time, when the lifting device is lifting, the friction resistance inside the track is large, which makes it inconvenient to automatically lubricate it. After being subjected to large friction resistance for a long time, the service life of the lifting device is easily reduced.

[0005] Therefore, we propose a lifting device for a trolley to solve the above-mentioned problems. Utility Model Content

[0006] The utility model aims to provide a lifting device for a trolley, so as to solve the problem raised by the above-mentioned background technology that the existing trolley lifting device on the market can lift its lifting platform through a lifting component when in use, but it is not convenient to clean the dust and impurities inside the lifting track during the lifting process. Because the trolley is under construction inside the tunnel, some dust can easily enter the track. As the dust and impurities inside the track increase, it is easy to increase the resistance of the lifting device during lifting. At the same time, when the lifting device is lifting, the friction resistance inside the track is large, which makes it inconvenient to automatically lubricate it. After being subjected to large friction resistance for a long time, the service life of the lifting device is easily reduced.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lifting device for a trolley, comprising a lifting platform, two symmetrically distributed sliders are fixedly installed on the back of the lifting platform, and the sliders are located inside the guide rails, a transmission screw is installed on one of the guide rails, the transmission screw is installed on the slider through, and the upper end of the transmission screw is fixed on the output end of the servo motor;

[0008] Also includes:

[0009] Scrapers are fixedly installed on the upper and lower ends of the slider, and a temperature sensing component for monitoring the internal temperature of the guide rail is embedded in the middle of the slider. A transfer groove is opened inside the lifting platform, and an exhaust hole connected to the outside is opened on the side of the transfer groove. A driving motor electrically connected to the temperature sensing component is fixedly connected to the interior of the transfer groove, and a reciprocating screw is fixedly installed on the output end of the driving motor. A piston block is installed on the reciprocating screw, and the right side of the piston block and the area surrounded by the transfer groove are connected to each other through a suction pipe and an oil storage block, and a refueling port is installed on the side of the oil storage block. An oil injection pipe with an opening facing the inside of the guide rail is also installed on the right side of the piston block and the area surrounded by the transfer groove, and a protective component for dust protection is installed at the opening of the oil injection pipe, and a one-way valve with opposite flow directions is installed on both the oil injection pipe and the suction pipe.

[0010] Preferably, the outer wall of the slider and the inner wall of the guide rail fit each other, and the slider and the guide rail form a sliding connection structure.

[0011] By adopting the above technical solution, the stability of the lifting platform during movement can be ensured through the movement of the slider in the guide rail.

[0012] Preferably, the scraper blades are symmetrically arranged with respect to the transverse center axis of the slider, and one end of the scraper blade away from the slider is in contact with the inner wall of the guide rail.

[0013] By adopting the above technical solution, when the slider moves inside the guide rail, the scrapers at the upper and lower ends of the slider can be used to scrape off the impurities and dust inside the guide rail.

[0014] Preferably, the temperature sensing component is configured as a temperature sensor.

[0015] By adopting the above technical solution, the temperature sensor can monitor the abnormal temperature when the temperature inside the guide rail rises due to increased friction resistance.

[0016] Preferably, the middle portion of the piston block and the reciprocating screw are threadedly connected, and the end portion of the piston block forms a seamless sliding connection structure with the transfer groove via a circumferentially fixed sealing ring.

[0017] By adopting the above technical solution, the sealing performance of the piston block when it moves in the transfer groove can be ensured through the sealing ring at the end of the piston block.

[0018] Preferably, the protective component includes a dust cover, a movable shaft and a vortex spring, and the dust cover is installed on the movable shaft, the movable shaft is fixedly installed at the end opening of the injection pipe, and the end of the movable shaft is installed with a vortex spring that provides a reset force for the dust cover.

[0019] By adopting the above technical solution, the vortex spring can be set to enable the dust cover to rebound when it is not subjected to force.

[0020] Preferably, the diameter of the dust cover is larger than the inner diameter of the fuel injection pipe, and the dust cover can rotate around the movable axis.

[0021] By adopting the above technical solution, when the oil injection pipe is squeezed outward to spray oil, the oil can push the dust cover to rotate, so that the dust cover rotates open to carry out normal oil injection.

[0022] Compared with the prior art, the utility model has the following beneficial effects: the trolley lifting device can conveniently scrape and clean the dust and impurities inside the track during the lifting process to ensure the cleanliness of the inside of the track. At the same time, when the friction resistance inside the track is large, the inside of the track is automatically lubricated to avoid the lifting device being subjected to large friction resistance for a long time.

[0023] 1. A scraper is provided. When the transmission screw rotates to control the slider to move inside the guide rail, the movement of the slider can make the scrapers at the upper and lower ends move synchronously. The movement of the scraper can clean the dust and impurities attached to the inside of the guide rail to ensure the cleanliness of the inside of the track;

[0024] 2. A temperature sensing component is provided, and the temperature sensing component is preferably a temperature sensor. The temperature sensor embedded in the slider can monitor the temperature inside the guide rail when the temperature inside the guide rail rises abnormally due to large friction resistance;

[0025] 3. An oil spray pipe is provided. When the temperature sensing component senses abnormal temperature, the drive motor is controlled to start. After the drive motor is turned on, the reciprocating screw can be rotated. After the reciprocating screw rotates, the threaded piston block moves back and forth inside the transfer groove. Therefore, the oil inside the oil storage block can be sucked by the suction pipe, and the oil spray pipe is used to spray the oil toward the inside of the guide rail, thereby realizing automatic lubrication of the inside of the guide rail and reducing the resistance of the subsequent slider when it moves inside the guide rail;

[0026] 4. A protective component is provided. In the initial state, a dust cover is installed at the end opening of the fuel injection pipe. The dust cover can be used to protect the opening of the fuel injection pipe to prevent impurities from entering the interior of the fuel injection pipe and blocking its passage. At the same time, when the fuel injection pipe is squeezed outward to spray oil, the oil can push the dust cover to rotate and open around the movable axis, thereby facilitating the normal outward spraying of the oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the front three-dimensional structure of the utility model;

[0028] Figure 2 This is a schematic diagram of the lifting platform and slider structure of the utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the lifting platform and oil storage block of the utility model;

[0030] Figure 4 This is a schematic diagram of the reciprocating screw rod and plug block structure of the utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the slider and scraper of the utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the fuel injection pipe and dust cover of the utility model;

[0033] Figure 7 For this utility model Figure 6 Enlarged structural diagram at A in the middle.

[0034] In the figure: 1. lifting platform; 2. slider; 3. guide rail; 4. transmission screw; 5. servo motor; 6. scraper; 7. temperature sensing component; 8. transfer tank; 9. exhaust hole; 10. drive motor; 11. reciprocating screw; 12. piston block; 13. suction tube; 14. oil storage block; 15. oil injection pipe; 16. protective component; 161. dust cover; 162. movable shaft; 163. vortex spring. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Example 1: Please refer to Figure 1-Figure 6The existing trolley lifting device lifts its lifting platform through the lifting assembly when in use, but it is not convenient to clean the dust and impurities inside the lifting track during the lifting process. Because the trolley is working inside the tunnel, some dust easily enters the track. As the dust and impurities inside the track increase, it is easy to increase the resistance of the lifting device during lifting. In order to solve this technical problem, this embodiment discloses the following technical content;

[0037] A lifting device for a trolley includes a lifting platform 1, two symmetrically distributed sliders 2 are fixedly installed on the back of the lifting platform 1, and the sliders 2 are located inside the guide rails 3, a transmission screw 4 is installed on one of the guide rails 3, the transmission screw 4 is installed through the slider 2, and the upper end of the transmission screw 4 is fixed on the output end of the servo motor 5; scrapers 6 are fixedly installed on the upper and lower ends of the slider 2, the outer wall of the slider 2 and the inner wall of the guide rail 3 are in contact with each other, and the slider 2 and the guide rail 3 form a sliding connection structure. The scrapers 6 are symmetrically arranged about the transverse central axis of the slider 2, and the end of the scrapers 6 away from the slider 2 is in contact with the inner wall of the guide rail 3.

[0038] When using the lifting device, the worker stands inside the lifting platform 1 and then controls the servo motor 5 to turn on. After the servo motor 5 is turned on, the transmission screw 4 can be rotated. After the transmission screw 4 is rotated, the threaded slider 2 can be moved inside the guide rail 3, thereby realizing the upward movement of the lifting platform 1 and transferring the workers to the top of the trolley to work. When the slider 2 moves inside the guide rail 3, the movement of the slider 2 can make the scrapers 6 at the upper and lower ends move synchronously. The movement of the scraper 6 can scrape off impurities and dust attached to the inside of the guide rail 3, thereby preventing the inside of the guide rail 3 from increasing the resistance of the lifting device during lifting due to excessive impurities.

[0039] Embodiment 2: The technical content disclosed in this embodiment is a further improvement on the above embodiment 1. When the lifting device is lifted, the friction resistance inside the track is large, which makes it inconvenient to automatically lubricate it. After being subjected to large friction resistance for a long time, the service life of the lifting device is easily reduced. In order to further solve this technical problem, this embodiment discloses the following technical content, such as Figure 2-Figure 7 As shown;

[0040] The middle of the slider 2 is inlaid with a temperature sensing component 7 for monitoring the internal temperature of the guide rail 3. A transfer slot 8 is provided inside the lifting platform 1, and an exhaust hole 9 connected to the outside is provided on the side of the transfer slot 8. A drive motor 10 electrically connected to the temperature sensing component 7 is fixedly connected inside the transfer slot 8. A reciprocating screw 11 is fixedly installed at the output end of the drive motor 10. A piston block 12 is installed on the reciprocating screw 11. The right side of the piston block 12 and the area surrounded by the transfer slot 8 are connected to each other through a suction pipe 13 and an oil storage block 14. A refueling port is installed on the side of the oil storage block 14. A fuel injection pipe 15 with an opening facing the inside of the guide rail 3 is also installed on the right side of the piston block 12 and the area surrounded by the transfer slot 8. A protective component 16 for dust protection is installed at the opening of the fuel injection pipe 15. Both the fuel injection pipe 15 and the suction pipe 13 are installed with a one-way valve with opposite flow directions. The temperature sensing component 7 is configured as a temperature sensor. The middle part of the piston block 12 and the reciprocating screw rod 11 are threadedly connected, and the end of the piston block 12 forms a seamless sliding connection structure with the transfer groove 8 through a circumferentially fixed sealing ring. The protective component 16 includes a dust cover 161, a movable shaft 162 and a vortex spring 163, and the dust cover 161 is installed on the movable shaft 162, and the movable shaft 162 is fixedly installed at the end opening of the injection pipe 15, and the end of the movable shaft 162 is installed with a vortex spring 163 that provides the dust cover 161 with a reset elastic force. The diameter of the dust cover 161 is larger than the inner diameter of the injection pipe 15, and the dust cover 161 can rotate around the movable shaft 162.

[0041] After the slider 2 slides inside the guide rail 3 for a long time, when the friction resistance between the guide rail 3 and the slider 2 is large, the internal temperature of the guide rail 3 rises due to the influence of the friction force. The temperature is monitored by the temperature sensor on the slider 2. When the temperature is abnormal, the temperature sensor controls the drive motor 10 to start. At this time, the reciprocating screw 11 rotates to enable the threaded piston block 12 to reciprocate inside the transfer groove 8. When the piston block 12 moves to the left side of the transfer groove 8, the oil inside the oil storage block 14 can be absorbed through the suction pipe 13. When the piston block 12 After moving toward the right side of the transfer tank 8, the oil inside the transfer tank 8 can be sprayed outward through the fuel injection pipe 15. When the fuel injection pipe 15 squeezes outward to spray oil, the oil can push the dust cover 161 to rotate around the movable shaft 162. At this time, the dust cover 161 is opened, and the oil can be sprayed normally into the guide rail 3. When oil spraying is not needed, the dust cover 161 is reset by the reset force provided by the vortex spring 163, and then the opening of the fuel injection pipe 15 is covered, thereby realizing dust-proof protection for the fuel injection pipe 15 and preventing external dust from entering the interior of the fuel injection pipe 15 and blocking its passage.

[0042] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0043] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or 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 shall be included in the protection scope of the present invention.

Claims

1. A trolley lifting device, comprising a lifting platform (1), two symmetrically distributed sliders (2) are fixedly mounted on the back of the lifting platform (1), and the sliders (2) are located inside guide rails (3), a transmission screw (4) is mounted on one of the guide rails (3), the transmission screw (4) is installed through the slider (2), and the upper end of the transmission screw (4) is fixed to the output end of a servo motor (5); It is characterized in that Also includes: Scrapers (6) are fixedly mounted at the upper and lower ends of the slider (2), and a temperature sensing component (7) for monitoring the internal temperature of the guide rail (3) is embedded in the middle of the slider (2). A transfer groove (8) is provided inside the lifting platform (1), and an exhaust hole (9) connected to the outside is provided on the side of the transfer groove (8). A driving motor (10) electrically connected to the temperature sensing component (7) is fixedly connected inside the transfer groove (8), and a reciprocating screw rod (11) is fixedly mounted on the output end of the driving motor (10). A piston block (12) is installed, and the right side of the piston block (12) and the area surrounded by the transfer groove (8) are connected to each other through a suction pipe (13) and an oil storage block (14), and a refueling port is installed on the side of the oil storage block (14). The right side of the piston block (12) and the area surrounded by the transfer groove (8) are also installed with an injection pipe (15) whose opening faces the inside of the guide rail (3), and the opening of the injection pipe (15) is installed with a protective component (16) for dust protection. Both the injection pipe (15) and the suction pipe (13) are installed with one-way valves with opposite flow directions.

2. A lifting device for a trolley according to claim 1, characterized in that: The outer wall of the sliding block (2) and the inner wall of the guide rail (3) fit each other, and the sliding block (2) and the guide rail (3) form a sliding connection structure.

3. A lifting device for a trolley according to claim 1, characterized in that: The scraper blade (6) is symmetrically arranged with respect to the transverse center axis of the slider (2), and one end of the scraper blade (6) away from the slider (2) is in contact with the inner wall of the guide rail (3).

4. A lifting device for a trolley according to claim 1, characterized in that: The temperature sensing component (7) is configured as a temperature sensor.

5. The lifting device for a trolley according to claim 1, characterized in that: The middle part of the piston block (12) and the reciprocating screw rod (11) are threadedly connected, and the end of the piston block (12) forms a seamless sliding connection structure with the transfer groove (8) via a circumferentially fixed sealing ring.

6. A lifting device for a trolley according to claim 1, characterized in that: The protective component (16) comprises a dust cover (161), a movable shaft (162) and a vortex spring (163), wherein the dust cover (161) is mounted on the movable shaft (162), the movable shaft (162) is fixedly mounted at the end opening of the fuel injection pipe (15), and the end of the movable shaft (162) is mounted with a vortex spring (163) for providing a return force to the dust cover (161).

7. A lifting device for a trolley according to claim 6, characterized in that: The diameter of the dust cover (161) is greater than the inner diameter of the fuel injection pipe (15), and the dust cover (161) is capable of rotating around the movable shaft (162).

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