Automatic tensioning device for a hoisting chain

Abstract

The utility model belongs to the technical field of lifting chain, especially relate to a lifting chain automatic tensioner, including lifting conveying device, the top fixed connection of lifting conveying device has fixed bottom plate, the lateral wall fixed connection of lifting conveying device has tensioning cylinder base, tensioning oil cylinder work drive tensioning slide along the outer wall of slide rail, tensioning slide slide drive bearing and driving shaft synchronous movement, thereby make work chain tension, when work chain tension reaches the use requirement, pressure sensor detects tensioning oil cylinder internal pressure output feedback signal, electric yellow grease pump stops oil supply, when work chain wear elongation tensioning oil cylinder internal pressure reduces, pressure sensor detects output signal and makes electric yellow grease pump start and supply oil for tensioning oil cylinder and supply oil tension work chain, simultaneously, pressure regulating valve adjusts electric yellow grease pump system pressure and has overflow function, if electric signal appears trouble, can guarantee work chain not to be over tensioned.

Description

Technical Field

[0001] This utility model belongs to the field of lifting chain technology, and in particular relates to an automatic tensioning device for lifting chains. Background Technology

[0002] Currently, road sweepers have been widely promoted and used in China, effectively replacing manual road sweeping and significantly improving work efficiency. Furthermore, using machinery to replace manual labor reduces the safety hazards associated with manual sweeping. Currently, in pure sweeping road sweepers, garbage collection involves the sweeping rollers rolling the garbage to the bottom of the lifting platform, where a scraper scrapes it into the garbage bin. The scraper is fixed to a chain, and the drive shaft drives the driven shaft in a cyclical motion. Therefore, the timely tensioning of the chain during lifting directly affects the working condition and service life of the lifting platform, necessitating a convenient and efficient automatic chain tensioning device. Utility Model Content

[0003] The purpose of this utility model is to address the aforementioned technical problems by providing an automatic tensioning device for lifting chains, enabling timely tensioning of the lifting and conveying device, ensuring the normal operation of the lifting device, and extending the service life of the equipment.

[0004] In view of this, the present invention provides an automatic tensioning device for a lifting chain, including a lifting and conveying device. A fixed base plate is fixedly connected to the top of the lifting and conveying device. A tensioning cylinder base is fixedly connected to the side wall of the lifting and conveying device. A tensioning cylinder is fixedly connected to the outer wall of the tensioning cylinder base. A tensioning cylinder fixing seat, which is fixedly connected to the outer wall of the tensioning cylinder base, is sleeved on the outer wall of the tensioning cylinder. A tensioning slide plate is fixedly connected to the output end of the tensioning cylinder. A lower set screw, which fits against the bottom end of the tensioning slide plate, is threadedly connected to the top of the tensioning cylinder base. A slide rail, which is fixedly connected to the outer wall of the fixed base plate, is slidably connected to the side wall of the tensioning slide plate. A bearing is installed on the outer wall of the tensioning slide plate. A drive shaft is installed on the inner wall of the bearing. A working chain is installed on the outer wall of the drive shaft. An electric grease pump is fixedly connected to the side wall of the lifting and conveying device. A pressure regulating valve is installed at the output end of the electric grease pump. A grease pipe is installed at the connection between the input end of the tensioning cylinder and the output end of the pressure regulating valve. A pressure sensor is installed on the outer wall of the tensioning cylinder.

[0005] Based on the above structure, the tensioning cylinder drives the tensioning slide plate to slide along the outer wall of the slide rail. The sliding of the tensioning slide plate drives the bearing and the drive shaft to move synchronously, thereby tensioning the working chain. When the working chain tension reaches the required level, the pressure sensor detects the internal pressure of the tensioning cylinder and outputs a feedback signal, and the electric grease pump stops supplying oil. When the working chain wears and elongates, the internal pressure of the tensioning cylinder decreases, and the pressure sensor detects the output signal, causing the electric grease pump to start and supply oil to the tensioning cylinder to tension the working chain. At the same time, the pressure regulating valve adjusts the pressure of the electric grease pump system and has an overflow function. If the electrical signal fails, it can ensure that the working chain is not over-tensioned.

[0006] Preferably, the cross-section of the tension cylinder fixing seat is "C" shaped. In this embodiment, by setting the tension cylinder fixing seat with a "C" shaped cross-section, it is beneficial to improve the stability of the tension cylinder and avoid the tension cylinder from shaking.

[0007] Preferably, the tensioning slide plate forms a sliding structure between the tensioning cylinder and the slide rail. In this embodiment, the tensioning cylinder can drive the tensioning slide plate to slide along the outer wall of the slide rail, thereby realizing the sliding operation of the tensioning slide plate.

[0008] Preferably, the slide rails are provided in two sets, and the two sets of slide rails are parallel. In this embodiment, by providing two sets of parallel slide rails, it is beneficial to improve the stability of the tensioning slide plate.

[0009] Preferably, there are two sets of lower set screws. The lower set screws form a telescopic structure with the tension cylinder base through threads. In this embodiment, when the operator rotates the lower set screws, the lower set screws rotate relative to the tension cylinder base through threads.

[0010] Preferably, the central axis of the lower set screw is parallel to the slide rail, and the tensioning slide plate forms a limiting structure between the lower set screw and the slide rail. In this embodiment, the lower limit position of the tensioning slide plate is limited by the lower set screw.

[0011] Preferably, the tensioning slide is provided in two sets, and the two sets of tensioning slides are symmetrical about the center of the drive shaft. In this embodiment, by providing two sets of tensioning slides, it is beneficial to improve the stability of the drive shaft movement and avoid the drive shaft from tilting.

[0012] The beneficial effects of this utility model are: 1. This automatic chain tensioning device uses a tensioning cylinder to drive a tensioning slide plate to slide along the outer wall of a guide rail. The sliding of the tensioning slide plate causes the bearing and drive shaft to move synchronously, thereby tensioning the working chain. When the working chain tension reaches the required level, a pressure sensor detects the internal pressure of the tensioning cylinder and outputs a feedback signal, stopping the electric grease pump from supplying oil. When the working chain wears and elongates, the internal pressure of the tensioning cylinder decreases, and the pressure sensor detects and outputs a signal that starts the electric grease pump to supply oil to the tensioning cylinder to tension the working chain. At the same time, a pressure regulating valve adjusts the system pressure of the electric grease pump and has an overflow function. In case of electrical signal failure, it ensures that the working chain is not over-tensioned.

[0013] 2. This automatic tensioning device for the lifting chain improves the stability of the tensioning cylinder and prevents it from shaking by setting a tensioning cylinder fixing seat with a "C"-shaped cross-section. It also improves the stability of the tensioning slide by setting two sets of parallel slide rails. The lower limit position of the tensioning slide is restricted by the lower set screw. The two sets of tensioning slides also improve the stability of the drive shaft movement and prevent the drive shaft from tilting. Attached Figure Description

[0014] Figure 1 This is a front view of the automatic chain tensioning device; Figure 2 This is the assembly diagram of the lifting device.

[0015] The markings in the diagram are as follows: 1. Fixed base plate; 2. Bearing; 3. Drive shaft; 4. Lower set screw; 5. Tensioning cylinder; 6. Tensioning cylinder base; 7. Pressure regulating valve; 8. Electric grease pump; 9. Grease pipe; 10. Pressure sensor; 11. Tensioning cylinder fixing seat; 12. Tensioning slide plate; 13. Slide rail; 14. Lifting and conveying device; 15. Working chain. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1 - Figure 2 This application will be described in further detail.

[0017] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0018] This application discloses an automatic tensioning device for a lifting chain, including a lifting conveyor 14. A fixed base plate 1 is fixedly connected to the top of the lifting conveyor 14, and a tensioning cylinder base 6 is fixedly connected to the side wall of the lifting conveyor 14. A tensioning cylinder 5 is fixedly connected to the outer wall of the tensioning cylinder base 6, and a tensioning cylinder fixing seat 11 is sleeved on the outer wall of the tensioning cylinder 5 and fixedly connected to the outer wall of the tensioning cylinder base 6. A tensioning slide plate 12 is fixedly connected to the output end of the tensioning cylinder 5, and a threaded connection is made to the top of the tensioning cylinder base 6 to a point abutting the bottom end of the tensioning slide plate 12. The lower set screw 4 of the tensioning slide plate 12 is slidably connected to the side wall of the tensioning slide plate 12 and fixedly connected to the outer wall of the fixed base plate 1. The outer wall of the tensioning slide plate 12 is equipped with a bearing 2. The inner wall of the bearing 2 is equipped with a drive shaft 3. The outer wall of the drive shaft 3 is equipped with a working chain 15. The side wall of the lifting and conveying device 14 is fixedly connected to an electric grease pump 8. The output end of the electric grease pump 8 is equipped with a pressure regulating valve 7. The connection between the input end of the tensioning cylinder 5 and the output end of the pressure regulating valve 7 is equipped with a grease pipe 9. The outer wall of the tensioning cylinder 5 is equipped with a pressure sensor 10.

[0019] Based on the above structure, the tensioning cylinder 5 drives the tensioning slide plate 12 to slide along the outer wall of the slide rail 13. The sliding of the tensioning slide plate 12 drives the bearing 2 and the drive shaft 3 to move synchronously, thereby tensioning the working chain 15. When the working chain 15 is tensioned to the required level, the pressure sensor 10 detects the internal pressure of the tensioning cylinder 5 and outputs a feedback signal, and the electric grease pump 8 stops supplying oil. When the working chain 15 wears and elongates, the internal pressure of the tensioning cylinder 5 decreases, and the pressure sensor 10 detects the output signal and starts the electric grease pump 8 to supply oil to the tensioning cylinder 5 to tension the working chain 15. At the same time, the pressure regulating valve 7 adjusts the system pressure of the electric grease pump 8 and has an overflow function. If the electrical signal fails, it can ensure that the working chain 15 is not over-tensioned.

[0020] In one embodiment, the cross-section of the tension cylinder fixing seat 11 is "C" shaped.

[0021] In this embodiment, by setting a tension cylinder fixing seat 11 with a "C" shaped cross-section, it is beneficial to improve the stability of the tension cylinder 5 and prevent the tension cylinder 5 from shaking.

[0022] In one embodiment, the tensioning slide plate 12 forms a sliding structure between the tensioning cylinder 5 and the slide rail 13.

[0023] In this embodiment, the tensioning cylinder 5 is designed to drive the tensioning slide plate 12 to slide along the outer wall of the slide rail 13, thereby enabling the tensioning slide plate 12 to slide.

[0024] In one embodiment, two sets of slide rails 13 are provided, and the two sets of slide rails 13 are parallel.

[0025] In this embodiment, by setting two sets of parallel slide rails 13, the stability of the tensioning slide plate 12 can be improved.

[0026] In one embodiment, two sets of lower set screws 4 are provided, and the lower set screws 4 form a telescopic structure with the tension cylinder base 6 through threads.

[0027] In this embodiment, the operator rotates the lower set screw 4, and the lower set screw 4 rotates relative to the tension cylinder base 6 through the thread.

[0028] In one embodiment, the central axis of the lower set screw 4 is parallel to the slide rail 13, and the tensioning slide plate 12 forms a limiting structure between the lower set screw 4 and the slide rail 13.

[0029] In this embodiment, the lower limit position of the tensioning slide plate 12 is restricted by the lower set screw 4.

[0030] In one embodiment, two sets of tensioning slide plates 12 are provided, and the two sets of tensioning slide plates 12 are symmetrical about the center of the drive shaft 3.

[0031] In this embodiment, by setting two sets of tensioning slide plates 12, it is beneficial to improve the stability of the movement of the drive shaft 3 and avoid the drive shaft 3 from tilting.

[0032] In this embodiment, the automatic tensioning device for the lifting chain operates as follows: First, the electric grease pump 8 supplies oil to the tensioning cylinder 5 through the grease pipe 9. The pressure regulating valve 7 adjusts the pressure of the electric grease pump 8, and the pressure sensor 10 detects the internal pressure of the tensioning cylinder 5 and outputs a feedback signal. Then, the electric grease pump 8 operates to supply oil to the tensioning cylinder 5, causing it to extend. The operation of the tensioning cylinder 5 drives the tensioning slide plate 12 to slide along the outer wall of the slide rail 13. The sliding of the tensioning slide plate 12 drives the bearing 2 and the drive shaft 3 to move synchronously, thereby tensioning the working chain 15. When the working chain 15 is tensioned to the required level, the pressure sensor 10 detects the internal pressure of the tensioning cylinder 5 and outputs a feedback signal, and the electric grease pump 8 stops supplying oil. When the working chain 15 wears and elongates, the internal pressure of the tensioning cylinder 5 decreases, and the pressure sensor 10 detects the output signal, causing the electric grease pump 8 to start supplying oil to the tensioning cylinder 5 to tension the working chain 15. At the same time, the pressure regulating valve 7 adjusts the system pressure of the electric grease pump 8 and has an overflow function. If the electrical signal fails, it can ensure that the working chain 15 is not over-tensioned.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic tensioning device for a lifting chain, characterized in that, The device includes a lifting and conveying device (14), the top of which is fixedly connected to a fixed base plate (1), the side wall of which is fixedly connected to a tension cylinder base (6), the outer wall of which is fixedly connected to a tension cylinder (5), the outer wall of which is fitted with a tension cylinder fixing seat (11) fixedly connected to the outer wall of the tension cylinder base (6), the output end of which is fixedly connected to a tensioning slide plate (12), the top of which is threaded with a lower set screw (4) that fits against the bottom end of the tensioning slide plate (12), and the tensioning slide plate (14) is fixedly connected to a tensioning cylinder base (6). 2) The side wall is slidably connected to a slide rail (13) which is fixedly connected to the outer wall of the fixed base plate (1). The outer wall of the tensioning slide plate (12) is equipped with a bearing (2). The inner wall of the bearing (2) is equipped with a drive shaft (3). The outer wall of the drive shaft (3) is equipped with a working chain (15). The side wall of the lifting and conveying device (14) is fixedly connected to an electric grease pump (8). The output end of the electric grease pump (8) is equipped with a pressure regulating valve (7). The connection between the input end of the tensioning cylinder (5) and the output end of the pressure regulating valve (7) is equipped with a grease pipe (9). The outer wall of the tensioning cylinder (5) is equipped with a pressure sensor (10).

2. The automatic tensioning device for the lifting chain according to claim 1, characterized in that: The cross-section of the tension cylinder fixing seat (11) is "C" shaped.

3. The automatic tensioning device for the lifting chain according to claim 1, characterized in that: The tensioning slide plate (12) forms a sliding structure between the tensioning cylinder (5) and the slide rail (13).

4. The automatic tensioning device for the lifting chain according to claim 1, characterized in that: The slide rail (13) is provided in two sets, and the two sets of slide rail (13) are parallel.

5. The automatic tensioning device for the lifting chain according to claim 1, characterized in that: The lower set screw (4) is provided in two sets, and the lower set screw (4) forms a telescopic structure with the tension cylinder base (6) through the thread.

6. The automatic tensioning device for the lifting chain according to claim 1, characterized in that: The central axis of the lower set screw (4) is parallel to the slide rail (13), and the tensioning slide plate (12) forms a limiting structure between the lower set screw (4) and the slide rail (13).

7. The automatic tensioning device for the lifting chain according to claim 1, characterized in that: The tensioning slide (12) is provided in two sets, and the two sets of tensioning slides (12) are symmetrical about the center of the drive shaft (3).

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