A jib retraction device for an off-road tyre crane

Abstract

The utility model discloses a kind of boom telescoping devices of off-road tire crane, belong to crane technical field, including basic arm, the telescopic arm is slidably connected in the basic arm, the end of basic arm is equipped with the material scraping component for the surface of telescopic arm is cleaned, and the moving assembly for driving telescopic arm telescopic motion is equipped on the upper end of basic arm;Moving assembly includes strip box, and the upper end of basic arm is fixedly installed with strip box, and driving roller is rotatably arranged in the inside both sides of strip box, and belt is cooperatively installed between two groups of driving roller, the utility model is driven by telescopic arm by moving assembly, motor is driven by worm gear transmission to drive roller and belt operation, make slider along slide groove drive telescopic arm stable telescoping, worm gear has self-locking performance, motor failure or power failure can lock driving roller, prevent telescopic arm accidental slippage, significantly improve the security and operating stability of boom telescoping.

Description

Technical Field

[0001] This invention belongs to the field of crane technology, and specifically relates to a boom extension device for an all-terrain tire crane. Background Technology

[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. It is also known as an overhead crane, gantry crane, or hoist.

[0003] Most existing boom telescopic mechanisms for lifting machinery adopt hydraulically driven telescopic structures. This driving method has problems with insufficient safety and stability. Once the hydraulic system fails or leaks, the telescopic boom is prone to accidental slippage and it is difficult to achieve reliable mechanical self-locking, posing a significant safety hazard. In addition, dust, impurities and other dirt easily adhere to the surface of the telescopic boom during the reciprocating extension and retraction process. Existing devices are not equipped with corresponding cleaning structures, making it impossible to effectively clean the surface of the boom when it retracts into the inner cavity of the basic boom. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides a boom telescopic device for an all-terrain tire crane, which features high safety and the ability to clean the surface of the boom when it is retracted.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a boom telescopic device for an all-terrain tire crane, comprising a basic boom, wherein a telescopic boom is slidably connected within the basic boom, one end of the basic boom is provided with a scraping assembly for cleaning the surface of the telescopic boom, and the upper end of the basic boom is provided with a moving assembly for driving the telescopic boom to telescopic movement.

[0006] The moving component includes a strip box. The strip box is fixedly installed on the upper end of the basic arm. Drive rollers are rotatably arranged on both sides inside the strip box. A belt is installed between the two sets of drive rollers. One side of the upper end of the telescopic arm is connected to the belt through a slider. A groove adapted to the slider is opened on the upper end of the basic arm. A worm gear is fixedly installed at the front end of one drive roller. A fixed box is fixedly installed at the front end of the strip box at the position corresponding to the worm gear. A motor is installed at one end of the fixed box at the position corresponding to the worm gear. A rotating rod is driven to the output end of the motor. A worm is fixedly installed on the surface of the rotating rod. The worm and the worm gear mesh with each other for transmission.

[0007] Preferably, the slider has protrusions at both ends, and the groove has grooves at both ends that are adapted to the protrusions.

[0008] Preferably, both the rear end of the strip box and the front end of the fixed box are detachably connected to a maintenance plate by bolts.

[0009] Preferably, the side of the belt is tightly fitted to the inner wall of the strip box, the drive roller is rotatably connected to the strip box via a rotating shaft, and the worm gear at the front end of one drive roller is welded and fixed to the rotating shaft.

[0010] Preferably, the length of the chute matches the length of the belt, and the side of the telescopic arm fits tightly against the inner wall of the basic arm.

[0011] Preferably, the worm gear and the rotating rod are welded as a single unit, and a bearing seat is provided at the mating position between the rotating rod and the fixed box.

[0012] Preferably, the scraping assembly includes a scraping cover, one end of the basic arm is provided with a scraping cover, two insert plates are provided on the side of the scraping cover near the basic arm, the insert plates and the scraping cover are connected by several connecting rods, one end of the basic arm is provided with a slot adapted to the insert plates, the insert plates and the basic arm are connected by fixing bolts, and fixing holes adapted to the fixing bolts are provided in the insert plates.

[0013] Preferably, the basic arm has through holes on both sides that are compatible with the fixing bolts. After the insert plate is inserted into the slot, the side of the insert plate fits tightly against the inner wall of the slot.

[0014] Preferably, after the scraper cover is installed at one end of the basic arm, the side of the telescopic arm fits against the inner wall of the scraper cover, and the scraper cover adopts a conical structure.

[0015] Preferably, the connecting rods are arranged at equal intervals, and two insert plates are symmetrically arranged on both sides of one end of the scraper cover.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention achieves telescopic boom drive through a moving component. The motor drives the drive roller and belt to rotate via a worm gear transmission, causing the slider to drive the telescopic boom to extend and retract smoothly along the slide groove. The worm gear has a self-locking function, which can lock the drive roller in case of motor failure or power failure, preventing accidental slippage of the telescopic boom and significantly improving the safety and operational stability of boom extension and retraction.

[0018] 2. The present invention cleans the telescopic arm through a scraping assembly. The scraping cover is quickly fixed to the end of the basic arm via a plate, slot and bolt. When the telescopic arm retracts, the scraping cover can scrape off the dust and impurities on its surface, preventing dirt from entering the basic arm and causing wear and jamming. The assembly is easy to disassemble and install, which is conducive to maintenance and effectively extends the service life of the device. Attached Figure Description

[0019] Figure 1 This is a cross-sectional perspective view of the present invention;

[0020] Figure 2 This is a cross-sectional left perspective view of the present invention;

[0021] Figure 3 This is a sectional perspective view of the fixing box of the present invention;

[0022] Figure 4 This is a perspective view of the belt of the present invention;

[0023] Figure 5 This is a perspective view of the scraper cover of the present invention;

[0024] In the diagram: 1. Basic arm; 2. Moving assembly; 21. Strip box; 22. Belt; 23. Drive roller; 24. Slider; 25. Slide groove; 26. Fixed box; 27. Worm gear; 28. Motor; 29. ​​Rotating rod; 210. Worm; 3. Scraper assembly; 31. Scraper cover; 32. Connecting rod; 33. Insert plate; 34. Slot; 35. Fixing bolt; 36. Fixing hole; 4. Telescopic arm. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1

[0027] Please see Figure 1-5 The present invention provides the following technical solution: a boom telescopic device for an all-terrain tire crane, including a basic boom 1, a telescopic boom 4 slidably connected inside the basic boom 1, a scraping component 3 for cleaning the surface of the telescopic boom 4 at one end of the basic boom 1, and a moving component 2 for driving the telescopic boom 4 to telescopic movement at the upper end of the basic boom 1.

[0028] The moving component 2 includes a strip box 21. The strip box 21 is fixedly installed on the upper end of the basic arm 1. Drive rollers 23 are rotatably arranged on both sides inside the strip box 21. A belt 22 is installed between the two sets of drive rollers 23. One side of the upper end of the telescopic arm 4 is connected to the belt 22 through a slider 24. The upper end of the basic arm 1 is provided with a groove 25 that matches the slider 24. A worm gear 27 is fixedly installed at the front end of one drive roller 23. A fixed box 26 is fixedly installed at the front end of the strip box 21 at the position corresponding to the worm gear 27. A motor 28 is installed at one end of the fixed box 26 at the position corresponding to the worm gear 27. A rotating rod 29 is connected to the output end of the motor 28. A worm 210 is fixedly installed on the surface of the rotating rod 29. The worm 210 and the worm gear 27 mesh with each other for transmission.

[0029] Specifically, the slider 24 has protrusions at both ends, and the slide groove 25 has grooves at both ends that are adapted to the protrusions. By adopting the above technical solution, the protrusions at both ends of the slider 24 cooperate with the grooves in the slide groove 25 to limit the slider 24 to move laterally, thereby improving sliding stability, avoiding shaking and jamming, and reducing wear on the contact surface and extending service life.

[0030] Specifically, the rear end of the strip box 21 and the front end of the fixed box 26 are both detachably connected to the inspection plate by bolts. By adopting the above technical solution, the inspection plate is detachably connected by bolts, which facilitates quick disassembly and opening of the strip box 21 and the fixed box 26, making it convenient to inspect, maintain and replace the internal drive components, improving the ease of operation and maintenance of the device and reducing maintenance costs.

[0031] Specifically, the side of the belt 22 is tightly fitted to the inner wall of the strip box 21, and the drive roller 23 is rotatably connected to the strip box 21 through a rotating shaft. The worm gear 27 at the front end of one drive roller 23 is welded and fixed to the rotating shaft. By adopting the above technical solution, the tight fit between the belt 22 and the inner wall of the strip box 21 can prevent deviation. The drive roller 23 achieves smooth rotation through the rotating shaft. The welded and fixed worm gear 27 to the rotating shaft ensures stable transmission, avoids transmission loosening, and ensures accurate and reliable telescopic drive.

[0032] Specifically, the length of the slide groove 25 matches the length of the belt 22, and the side of the telescopic arm 4 fits tightly against the inner wall of the basic arm 1. By adopting the above technical solution, the length of the slide groove 25 matches the length of the belt 22, which can ensure that the stroke of the slider 24 is adapted to the telescopic range of the telescopic arm 4. The telescopic arm 4 fits tightly against the inner wall of the basic arm 1, ensuring smooth telescopic movement, avoiding deviation and shaking, and improving the telescopic accuracy of the boom.

[0033] Specifically, the worm 210 and the rotating rod 29 are welded as a single unit. The rotating rod 29 is fitted with a bearing seat at the mating position with the fixed box 26. By adopting the above technical solution, the worm 210 and the rotating rod 29 are welded as a single unit, which has strong transmission rigidity and no looseness. With the support of the bearing seat, the rotation is more stable, friction loss is reduced, and the transmission of the worm wheel 27 and worm 210 is accurate and reliable.

[0034] In this embodiment, the starting motor 28 drives the rotating rod 29 to rotate, which in turn drives the worm gear 210 to rotate synchronously. The worm gear 210 and the worm wheel 27 form a meshing transmission, driving the drive roller 23 to operate stably inside the strip box 21. The rotation of the drive roller 23 drives the belt 22 to run inside the strip box 21. The belt 22 drives the telescopic arm 4 to perform telescopic movements inside the basic arm 1 through the slider 24. The slider 24 slides directionally along the slide groove 25 to ensure smooth and reliable movement. When the motor 28 suddenly fails or loses power, the inherent self-locking characteristics of the worm gear 210 and worm wheel 27 mechanism can effectively lock the drive roller 23 to prevent it from rotating freely. This achieves reliable self-locking of the slider 24 and the telescopic arm 4, preventing the telescopic arm 4 from slipping unexpectedly or extending and retracting on its own, and greatly improving the operational safety and stability of the telescopic drive mechanism.

[0035] Example 2

[0036] The difference between this embodiment and embodiment 1 is that the scraping assembly 3 includes a scraping cover 31. A scraping cover 31 is provided at one end of the basic arm 1. Two insert plates 33 are provided near the side of the scraping cover 31 close to the basic arm 1. The insert plates 33 are connected to the scraping cover 31 by several connecting rods 32. A slot 34 adapted to the insert plate 33 is provided at one end of the basic arm 1. The insert plate 33 is connected to the basic arm 1 by fixing bolts 35. Fixing holes 36 adapted to the fixing bolts 35 are provided inside the insert plate 33. By adopting the above technical solution, the scraping cover 31 is entirely fitted onto the outer periphery of the telescopic arm 4, and the insert plates 33 at the ends of the connecting rods 32 are connected to the telescopic arm 4. The scraper cover 31 is precisely inserted and positioned into the pre-set slot 34 at the end of the basic arm 1. Then, the fixing bolt 35 is passed through the basic arm 1 and screwed into the fixing hole 36 on the insert plate 33 to complete the secure installation of the scraper cover 31. During the process of the telescopic arm 4 retracting into the basic arm 1, the scraper cover 31 can continuously scrape and clean the outer surface of the telescopic arm 4, effectively removing dust, impurities and other attachments, and preventing dirt from entering the inner cavity of the basic arm 1 with the telescopic arm 4, causing wear or jamming. The scraper assembly 3 has a simple structure and is easy to disassemble and assemble, which facilitates subsequent disassembly, maintenance and cleaning, significantly improves the cleanliness of the telescopic arm 4 during the reciprocating telescopic process and extends the service life of the mechanism.

[0037] Specifically, the basic arm 1 has through holes on both sides that are compatible with the fixing bolts 35. After the insert plate 33 is inserted into the slot 34, the side of the insert plate 33 fits tightly against the inner wall of the slot 34. By adopting the above technical solution, the through holes on both sides of the basic arm 1 facilitate the installation of the fixing bolts 35. The tight fit between the insert plate 33 and the inner wall of the slot 34 can improve the assembly positioning accuracy, prevent the scraper cover 31 from loosening or shifting, and ensure the structure is stable and reliable.

[0038] Specifically, after the scraper cover 31 is installed at one end of the basic arm 1, the side of the telescopic arm 4 is in contact with the inner wall of the scraper cover 31. The scraper cover 31 adopts a conical structure. By adopting the above technical solution, the inner wall of the scraper cover 31 is in close contact with the telescopic arm 4. With the conical structure, it can effectively scrape off surface impurities, improve the cleaning effect, and at the same time reduce the telescopic resistance and ensure smooth retraction.

[0039] Specifically, several connecting rods 32 are arranged at equal intervals, and two insert plates 33 are symmetrically arranged on both sides of one end of the scraper cover 31. By adopting the above technical solution, the connecting rods 32 are arranged at equal intervals and the insert plates 33 are symmetrically arranged, so that the scraper cover 31 is subjected to uniform and stable force, is firmly installed and not easily deformed, ensures reliable scraping operation, and improves the overall structural durability.

[0040] In this embodiment, the scraper cover 31 is fitted onto the outer periphery of the telescopic arm 4. The insert plate 33 at the end of the connecting rod 32 is precisely inserted into the pre-set slot 34 at the end of the basic arm 1 for positioning. Then, the fixing bolt 35 is passed through the basic arm 1 and screwed into the fixing hole 36 on the insert plate 33 to complete the secure installation of the scraper cover 31. During the process of the telescopic arm 4 retracting into the basic arm 1, the scraper cover 31 can continuously scrape and clean the outer surface of the telescopic arm 4, effectively removing dust, impurities and other attachments, and preventing dirt from entering the inner cavity of the basic arm 1 with the telescopic arm 4, causing wear or jamming. The scraper assembly 3 has a simple structure and is easy to disassemble and assemble, which facilitates subsequent disassembly, maintenance and cleaning, significantly improves the cleanliness of the telescopic arm 4 during the reciprocating telescopic process and extends the service life of the mechanism.

[0041] The working principle and usage process of this invention are as follows: First, install the device in a suitable position, start the motor 28 to drive the rotating rod 29 to rotate, which in turn drives the worm gear 210 to rotate synchronously. The worm gear 210 and the worm wheel 27 form a meshing transmission, driving the drive roller 23 to operate stably in the strip box 21. The rotation of the drive roller 23 drives the belt 22 to run inside the strip box 21. The belt 22 drives the telescopic arm 4 to achieve telescopic movement in the cavity of the basic arm 1 through the slider 24. The slider 24 slides directionally along the slide groove 25 to ensure smooth and reliable movement. When the motor 28 suddenly fails or loses power, relying on the inherent self-locking characteristics of the worm gear 210 and worm wheel 27 mechanism, the drive roller 23 can be effectively locked to prevent it from rotating freely, thereby achieving reliable self-locking of the slider 24 and the telescopic arm 4, preventing the telescopic arm 4 from accidentally sliding or extending and retracting on its own, and greatly improving the operational safety and stability of the telescopic drive mechanism.

[0042] The scraper cover 31 is fitted onto the outer periphery of the telescopic arm 4. The insert plate 33 at the end of the connecting rod 32 is precisely inserted into the pre-set slot 34 at the end of the basic arm 1 for positioning. Then, the fixing bolt 35 is passed through the basic arm 1 and screwed into the fixing hole 36 on the insert plate 33 to complete the secure installation of the scraper cover 31. During the process of the telescopic arm 4 retracting into the basic arm 1, the scraper cover 31 can continuously scrape and clean the outer surface of the telescopic arm 4, effectively removing dust, impurities and other attachments, and preventing dirt from entering the inner cavity of the basic arm 1 with the telescopic arm 4, causing wear or jamming. The scraper assembly 3 has a simple structure and is easy to disassemble and assemble, which facilitates subsequent disassembly, maintenance and cleaning, significantly improves the cleanliness of the telescopic arm 4 during the reciprocating telescopic process and extends the service life of the mechanism.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boom extension device for an all-terrain tire crane, comprising a basic boom (1), characterized in that: The basic arm (1) is slidably connected to a telescopic arm (4). One end of the basic arm (1) is provided with a scraping assembly (3) for cleaning the surface of the telescopic arm (4). The upper end of the basic arm (1) is provided with a moving assembly (2) for driving the telescopic arm (4) to extend and retract. The moving component (2) includes a strip box (21). The strip box (21) is fixedly installed on the upper end of the basic arm (1). Drive rollers (23) are rotatably arranged on both sides inside the strip box (21). A belt (22) is installed between the two sets of drive rollers (23). One side of the upper end of the telescopic arm (4) is connected to the belt (22) through a slider (24). A groove (25) adapted to the slider (24) is opened on the upper end of the basic arm (1). A worm wheel (27) is fixedly provided at the front end of one drive roller (23). A fixed box (26) is fixedly provided at the front end of the strip box (21) corresponding to the worm wheel (27). A motor (28) is installed at one end of the fixed box (26) corresponding to the worm wheel (27). A rotating rod (29) is connected to the output end of the motor (28). A worm (210) is fixedly provided on the surface of the rotating rod (29). The worm (210) and the worm wheel (27) mesh with each other for transmission.

2. The boom telescopic device of an all-terrain tire crane according to claim 1, characterized in that: The slider (24) has protrusions at both ends, and the groove (25) has grooves at both ends that are adapted to the protrusions.

3. The boom telescopic device of an all-terrain tire crane according to claim 1, characterized in that: The rear end of the strip box (21) and the front end of the fixed box (26) are both detachably connected to a maintenance plate by bolts.

4. The boom telescopic device of an all-terrain tire crane according to claim 1, characterized in that: The side of the belt (22) is tightly fitted to the inner wall of the strip box (21), and the drive roller (23) is rotatably connected to the strip box (21) through a rotating shaft. The worm gear (27) at the front end of one drive roller (23) is welded and fixed to the rotating shaft.

5. The boom telescopic device of an all-terrain tire crane according to claim 1, characterized in that: The length of the groove (25) matches the length of the belt (22), and the side of the telescopic arm (4) fits tightly against the inner wall of the basic arm (1).

6. The boom telescopic device of an all-terrain tire crane according to claim 1, characterized in that: The worm (210) and the rotating rod (29) are welded as a whole, and a bearing seat is provided at the mating position of the rotating rod (29) and the fixed box (26).

7. The boom telescopic device of an all-terrain tire crane according to claim 1, characterized in that: The scraping assembly (3) includes a scraping cover (31). The scraping cover (31) is provided at one end of the basic arm (1). Two insert plates (33) are provided on the side of the scraping cover (31) near the basic arm (1). The insert plates (33) and the scraping cover (31) are connected by several connecting rods (32). A slot (34) adapted to the insert plate (33) is opened at one end of the basic arm (1). The insert plate (33) is connected to the basic arm (1) by a fixing bolt (35). A fixing hole (36) adapted to the fixing bolt (35) is opened in the insert plate (33).

8. The boom telescopic device of an all-terrain tire crane according to claim 7, characterized in that: The basic arm (1) has through holes on both sides that are compatible with the fixing bolts (35). After the insert plate (33) is inserted into the slot (34), the side of the insert plate (33) fits tightly against the inner wall of the slot (34).

9. The boom telescopic device of an all-terrain tire crane according to claim 7, characterized in that: After the scraper cover (31) is installed at one end of the basic arm (1), the side of the telescopic arm (4) is in contact with the inner wall of the scraper cover (31), and the scraper cover (31) adopts a conical structure.

10. The boom telescopic device of an all-terrain tire crane according to claim 7, characterized in that: Several connecting rods (32) are arranged at equal intervals, and two insert plates (33) are symmetrically arranged on both sides of one end of the scraper cover (31).

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