Safety supporting rod for cab maintenance

Abstract

The safety supporting rod comprises a base and a fixing rod, the bottom end of the fixing rod is connected into the base in an inserted mode, a limiting structure for preventing the fixing rod from rotating is arranged in the base, the outer wall of the fixing rod is in threaded connection with a sleeve, and the sleeve is in threaded connection with the fixing rod. The top of the sleeve is provided with a top block for supporting the inverted cab and a self-adaptive structure convenient for the top block to be attached to the inner cabin of the cab; telescopic adjustment in the vertical direction is achieved through the threaded matching structure of the fixing rod and the sleeve, compared with a traditional folding type three-folding structure, the rod type design can reduce the transverse occupied space, the operation space around a maintenance area is increased, and maintenance of components around the device is facilitated. The head of an operator is protected by arranging the top protection plate and the self-locking structure, impact of parts falling from the top to the head is avoided, meanwhile, the protection plate is automatically locked after being unfolded through cooperation of the positioning balls and the multi-stage positioning holes, use is convenient, and operation is easy.

Description

Technical Field

[0001] This utility model relates to the field of automotive maintenance auxiliary equipment technology, specifically a safety strut for cab maintenance. Background Technology

[0002] When vehicles are being repaired, especially trucks or construction machinery, the cab must be jacked up, often using hydraulic or mechanical devices. If the support system, such as hydraulic struts or pneumatic devices, suddenly fails, the cab could fall instantly, causing fatal injuries to the repair personnel below. Safety struts, as rigid physical supports, can bear weight independently and prevent the risk of a fall even if the main system fails.

[0003] A search revealed a support rod mechanism for cab tilting disclosed in patent application publication number CN201914336U, belonging to the technical field of motor vehicle cab tilting devices. Its purpose is to provide a support rod mechanism for cab tilting that ensures the safety of maintenance personnel during cab tilting. The key technical points are: it includes an upper support rod bracket, an upper support rod, a lower support rod bracket, a lower support rod, and a locking arm. The locking arm is hinged to a pin located on the outer side of the upper support rod near the lower support rod. The upper support rod at the pin's rotation direction has a shaped pin hole, and a safety pin connected by a chain and matching the shaped hole is fixed to the side of the lower support rod near the locking arm. When the cab is tilted and the support rod is raised, the safety pin is inserted into the shaped pin hole on the upper support rod to lock the locking arm, preventing it from rotating. Even if maintenance personnel inadvertently touch the locking arm while maintaining or repairing the vehicle engine, the locking arm cannot be released, thus ensuring the safety of maintenance personnel.

[0004] The device achieves support through a three-fold structure. While it does provide support, it requires a wide folding surface, taking up maintenance space around the device, and it does not provide head protection for the operator. Utility Model Content

[0005] The purpose of this utility model is to provide a safety support rod for cab maintenance. By setting a fixed rod and sleeve in conjunction with a top block to support the inverted cab, the rod structure can reduce the space occupied by the device and facilitate maintenance. At the same time, a guard plate is set on the top of the device, and maintenance personnel operate under the guard plate to prevent parts in the cab from accidentally falling and causing head injuries to the maintenance personnel.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a safety support rod for cab maintenance, comprising a base and a fixed rod, the bottom end of the fixed rod being inserted into the base, the base being provided with a limiting structure to prevent the fixed rod from rotating, the outer wall of the fixed rod being threadedly connected to a sleeve, the top of the sleeve being provided with a top block for supporting the inverted cab roof and an adaptive structure to facilitate the top block fitting into the cab interior, and the top of the sleeve being provided with a protective structure to protect the operator's head;

[0007] The protective structure includes a base welded to the outer wall of the sleeve, and protective plates and a self-locking structure for easy horizontal adjustment of the protective plates are provided on both sides of the base.

[0008] Preferably, the self-locking structure includes a pull rod and a slider. The base has grooves on both sides, the slider is slidably connected in the groove, the two ends of the pull rod are welded to the two sliders respectively, a guide plate is fixed on one side of the inner cavity of the groove, a guide groove is provided on one side of the slider, and the guide plate is located in the guide groove.

[0009] Preferably, the self-locking structure further includes a positioning bead and a positioning hole. The top and bottom of the slider are provided with grooves, and a spring is fixed in the groove. One end of the spring is fixedly connected to the positioning bead. The positioning hole is opened in the inner cavity of the slide groove, and the positioning bead is engaged in the positioning hole.

[0010] The positioning holes are provided in several ways.

[0011] Preferably, the adaptive structure includes a movable groove and a movable block. The movable groove is formed at the top of the sleeve, the top end of the movable block is welded to the bottom end of the top block, the movable block is located in the movable groove, and a movable rod is inserted into the movable block. The movable rod passes through the outer wall of the sleeve and is rotatably connected to the sleeve.

[0012] Preferably, the limiting structure includes a limiting plate, which is welded to the outer wall of the fixing rod. A cylindrical groove is provided in the middle of the base, and a limiting groove is provided on the inner wall of the cylindrical groove. The limiting plate is inserted into the limiting groove.

[0013] Preferably, a collar is welded to the outer wall of the sleeve, and a rotating rod is welded to the outer wall of the collar to facilitate the rotation of the sleeve. Two rotating rods are provided, and the two rotating rods are arranged symmetrically.

[0014] Preferably, the top of the top block is arc-shaped, and a foot plate is welded to the lower surface of the base.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model achieves vertical telescopic adjustment through the threaded engagement structure of the fixed rod and the sleeve. Compared with the traditional folding three-fold structure, the rod-type design can reduce the lateral space occupied, increase the operating space around the maintenance area, and facilitate the maintenance of the components around the device.

[0017] The top guard plate and self-locking structure protect the operator's head from impacts caused by falling parts. The positioning bead and multi-level positioning holes work together to automatically lock the protective plate after it is unfolded, making it convenient and easy to use. Attached Figure Description

[0018] Figure 1 This is an isometric drawing of this utility model;

[0019] Figure 2 This is a schematic diagram of the protective structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the slider of this utility model;

[0021] Figure 4 This is a schematic diagram of the limiting structure of this utility model.

[0022] In the diagram: 1. Base; 2. Fixing rod; 3. Limiting structure; 4. Sleeve; 5. Top block; 6. Adaptive structure; 7. Protective structure; 701. Base; 702. Guard plate; 703. Pull rod; 704. Slider; 705. Slide groove; 706. Guide plate; 707. Guide groove; 708. Positioning bead; 709. Positioning hole; 710. Groove; 711. Spring; 601. Movable groove; 602. Movable block; 603. Movable rod; 301. Limiting plate; 302. Cylindrical groove; 303. Limiting groove; 8. Collar; 9. Rotating rod; 10. Step plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4This utility model provides a technical solution: a safety support rod for cab maintenance, including a base 1 and a fixing rod 2. The bottom end of the fixing rod 2 is inserted into the base 1. The base 1 is provided with a limiting structure 3 to prevent the fixing rod 2 from rotating. The outer wall of the fixing rod 2 is threadedly connected to a sleeve 4. The top of the sleeve 4 is provided with a top block 5 for supporting the inverted cab roof and an adaptive structure 6 to facilitate the fitting of the top block 5 with the cab interior. The top of the sleeve 4 is provided with a protective structure 7 to protect the operator's head.

[0025] When the sleeve 4 is rotated, the inner thread of the sleeve 4 engages with the outer thread of the fixing rod 2, forcing the sleeve 4 to move vertically up and down along the fixing rod 2. The rod-type telescopic design avoids the lateral unfolding of the folding structure, saving space in the maintenance area.

[0026] The protective structure 7 includes a base 701, which is welded to the outer wall of the sleeve 4. The base 701 has a protective plate 702 on both sides and a self-locking structure that facilitates the horizontal adjustment of the protective plate 702.

[0027] The self-locking structure facilitates automatic positioning after manual movement of the guard plate 702, making operation convenient.

[0028] The self-locking structure includes a pull rod 703 and a slider 704. The base 701 has grooves 705 on both sides. The slider 704 is slidably connected in the groove 705. The two ends of the pull rod 703 are welded to the two sliders 704 respectively. A guide plate 706 is fixed on one side of the inner cavity of the groove 705. A guide groove 707 is opened on one side of the slider 704. The guide plate 706 is located in the guide groove 707.

[0029] The self-locking structure also includes a positioning bead 708 and a positioning hole 709. The top and bottom of the slider 704 are provided with grooves 710. A spring 711 is fixed in the groove 710. One end of the spring 711 is fixedly connected to the positioning bead 708. The positioning hole 709 is opened in the inner cavity of the slide groove 705. The positioning bead 708 is engaged in the positioning hole 709.

[0030] The positioning hole 709 is provided with several holes.

[0031] The guard plate 702 is connected to the slider 704 via sliding grooves 705 on both sides of the base 701. The guide plate 706 within the sliding groove 705 is embedded in the guide groove 707 of the slider 704, ensuring a straight sliding trajectory. When the slider 704 moves, the positioning bead 708, under the preload of the spring 711, is embedded in the multi-stage positioning hole 709 of the sliding groove 705, achieving automatic locking after the slider 704 has moved. The top guard plate 702 provides head protection for the operator, preventing impact from falling parts.

[0032] The adaptive structure 6 includes a movable groove 601 and a movable block 602. The movable groove 601 is formed at the top of the sleeve 4. The top end of the movable block 602 is welded to the bottom end of the top block 5. The movable block 602 is located inside the movable groove 601. A movable rod 603 is inserted into the movable block 602. The movable rod 603 passes through the outer wall of the sleeve 4 and is rotatably connected to the sleeve 4.

[0033] The movable slot 601 houses a movable block 602, which forms a rotating pair with the sleeve 4 via movable rods 603 on both sides. When the top block 5 contacts the curved surface of the cockpit, the movable block 602 swings or translates slightly within the movable slot 601, causing the top block 5 to deflect around the axis of the movable rod 603, ensuring its curved surface fits tightly against the cabin. This degree of freedom design compensates for installation angle deviations, ensures uniform force on the top support, and avoids localized stress concentration.

[0034] The limiting structure 3 includes a limiting plate 301, which is welded to the outer wall of the fixing rod 2. A cylindrical groove 302 is provided in the middle of the base 1, and a limiting groove 303 is provided in the inner wall of the cylindrical groove 302. The limiting plate 301 is inserted into the limiting groove 303.

[0035] The bottom end of the fixing rod 2 is inserted into the cylindrical groove 302 of the base 1, and the limiting plate 301 cooperates with the limiting groove 303 to prevent the fixing rod 2 from rotating.

[0036] The outer wall of the sleeve 4 is welded with a collar 8, and the outer wall of the collar 8 is welded with a rotating rod 9 to facilitate the rotation of the sleeve 4. There are two rotating rods 9, and the two rotating rods 9 are arranged symmetrically.

[0037] The collar 8 and the rotating rod 9 provide a fulcrum for applying force, and reduce rotational resistance through the lever principle to achieve single-handed operation and height adjustment.

[0038] The top of the top block 5 is arc-shaped, and a step plate 10 is welded to the lower surface of the base 1.

[0039] The limiting plate 301 at the bottom of the fixed rod 2 engages with the limiting groove 303 of the base 1 to prevent the fixed rod 2 from shaking during lifting. The bottom step plate 10 of the base 1 increases the contact area to improve friction. After maintenance personnel step on it, the position of the base 1 can be further fixed to prevent the support rod from shifting due to external force.

[0040] When in use, step on the fixed position of the base 1, rotate the rotating rod 9 to make the sleeve 4 rotate, the inner thread of the sleeve 4 engages with the outer thread of the fixed rod 2, so that the sleeve 4 rises vertically along the fixed rod 2, driving the top block 5 and the guard plate 702 to rise and be adjusted to the target height. When the top block 5 contacts the curved surface of the cockpit, the movable block 602 swings or moves slightly in the movable groove 601, causing the top block 5 to deflect around the axis of the movable rod 603, so that its arc surface fits tightly against the cabin body.

[0041] After the top block 5 adaptively fits the top surface of the cab to form a stable support, the sliding block 704 adjusts the position of the guard plate 702. When the slider 704 moves, the positioning bead 708 is pre-pressurized by the spring 711 and embedded in the multi-stage positioning hole 709 of the slide groove 705 to achieve automatic locking after the slider 704 moves.

[0042] During maintenance, when workers operate below the guard plate 702, the force is transmitted to the sleeve 4 through the slider 704 and the groove 705 when the object falls from the top and impacts the guard plate 702. Finally, the force is distributed to the base 1 by the entire support structure, forming a protective barrier.

[0043] Compared to the traditional folding three-fold structure, the pole-type design can reduce the lateral space occupied, facilitate the maintenance of components around the device, and provide protection for operators.

[0044] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safety strut for cab maintenance, characterized in that: Includes a base (1) and a fixing rod (2). The bottom end of the fixing rod (2) is inserted into the base (1). The base (1) is provided with a limiting structure (3) to prevent the fixing rod (2) from rotating. The outer wall of the fixing rod (2) is threaded with a sleeve (4). The top of the sleeve (4) is provided with a top block (5) for supporting the inverted cab roof and an adaptive structure (6) to facilitate the fitting of the top block (5) with the cab interior. The top of the sleeve (4) is provided with a protective structure (7) to protect the operator's head. The protective structure (7) includes a base (701), which is welded to the outer wall of the sleeve (4). The base (701) is provided with a guard plate (702) on both sides and a self-locking structure that facilitates the horizontal adjustment of the guard plate (702).

2. A safety strut for cab maintenance according to claim 1, characterized in that: The self-locking structure includes a pull rod (703) and a slider (704). The base (701) has grooves (705) on both sides. The slider (704) is slidably connected in the groove (705). The two ends of the pull rod (703) are welded to the two sliders (704) respectively. A guide plate (706) is fixed on one side of the inner cavity of the groove (705). A guide groove (707) is opened on one side of the slider (704). The guide plate (706) is located in the guide groove (707).

3. A safety strut for cab maintenance according to claim 2, characterized in that: The self-locking structure also includes a positioning bead (708) and a positioning hole (709). The top and bottom of the slider (704) are provided with grooves (710). A spring (711) is fixed in the groove (710). One end of the spring (711) is fixedly connected to the positioning bead (708). The positioning hole (709) is opened in the inner cavity of the slide groove (705). The positioning bead (708) is engaged in the positioning hole (709). The positioning holes (709) are provided in several places.

4. A safety strut for cab maintenance according to claim 3, characterized in that: The adaptive structure (6) includes a movable groove (601) and a movable block (602). The movable groove (601) is opened at the top of the sleeve (4). The top of the movable block (602) is welded to the bottom of the top block (5). The movable block (602) is located in the movable groove (601). A movable rod (603) is inserted into the movable block (602). The movable rod (603) passes through the outer wall of the sleeve (4) and is rotatably connected to the sleeve (4).

5. A safety strut for cab maintenance according to claim 4, characterized in that: The limiting structure (3) includes a limiting plate (301), which is welded to the outer wall of the fixing rod (2). A cylindrical groove (302) is provided in the middle of the base (1), and a limiting groove (303) is provided on the inner wall of the cylindrical groove (302). The limiting plate (301) is inserted into the limiting groove (303).

6. A safety strut for cab maintenance according to claim 5, characterized in that: The outer wall of the sleeve (4) is welded with a collar (8), and the outer wall of the collar (8) is welded with a rotating rod (9) to facilitate the rotation of the sleeve (4). There are two rotating rods (9), and the two rotating rods (9) are arranged symmetrically.

7. A safety strut for cab maintenance according to claim 1, characterized in that: The top of the top block (5) is arc-shaped, and the lower surface of the base (1) is welded with a step plate (10).

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