Protective device for lifting oil cylinder of bulldozer

Abstract

The utility model provides a bulldozer lifting oil cylinder protection device, which belongs to the technical field of lifting oil cylinders, and comprises a shell, an end cover and a connecting assembly, the shell is used for fixing a lifting oil cylinder body, the end cover is positioned above the shell and is detachably connected with the shell, the end cover is in sliding connection with a piston rod of a lifting oil cylinder, and the connecting assembly is connected with the shell. The connecting assembly comprises four evenly-distributed mounting blocks fixed to the side wall of the top of the shell, inserting grooves are formed in the mounting blocks, inserting rods corresponding to the inserting grooves in position are fixed to the end cover, the connecting assembly further comprises a locking component, the locking component comprises transverse grooves formed in the mounting blocks, the transverse grooves communicate with the inserting grooves, and the transverse grooves communicate with the inserting grooves. And a wedge-shaped block is connected in the transverse groove in a sliding manner. According to the bulldozer fixing device, the connecting assembly is arranged, mounting and dismounting are convenient, loosening caused by vibration when a bulldozer works after fixing is avoided, the fixing effect is better, and the heat dissipation effect of the device is improved through the arrangement of the heat dissipation assembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of lifting cylinders, and particularly relates to a protective device for a bulldozer lifting cylinder. Background Art

[0002] A lifting cylinder is a cylinder that generates thrust using the hydraulic principle. It mainly consists of a cylinder body, a piston, a piston rod, seals, a guide sleeve, etc. As an important hydraulic component, the lifting cylinder is widely used in various mechanical equipment, such as elevators, bulldozers, etc., to achieve functions such as lifting, lowering, or translating objects.

[0003] After retrieval, Chinese Patent Publication No. CN221503649U discloses a protective device for a hydraulic cylinder. The hydraulic cylinder body can be protected through a fixed outer shell and a cover plate. The fastening bolts enable the clamping plate to clamp the outer wall of the hydraulic cylinder body. When the adjusting screw rod rotates, the pressing plate can press and limit the top of the hydraulic cylinder body. The protective pad can prevent fine particle impurities from entering the interior of the hydraulic cylinder body through the gap between the piston rod and the cylinder barrel, and can extend the service life of the hydraulic cylinder body.

[0004] The existing technology has the following deficiencies:

[0005] 1. The cover plate and the outer shell of the existing device are fixed by bolts, which is inconvenient for installation and disassembly. During the working process of the bulldozer, due to various factors such as uneven road surfaces, there will be strong vibrations. The bolts are prone to falling off under long-term vibrations, resulting in unstable fixation of the cover plate.

[0006] 2. The heat dissipation performance of the existing device is poor. When the oil cylinder is working, the piston rod reciprocates and rubs against the oil cylinder body, generating a large amount of heat. The increase in temperature inside the oil cylinder will affect the normal operation of the oil cylinder and pose a certain danger. Summary of the Utility Model

[0007] The purpose of the utility model is to solve the problems mentioned in the background art of the existing technology, and to propose a protective device for a bulldozer lifting cylinder.

[0008] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0009] A protective device for a bulldozer lifting cylinder, comprising:

[0010] An outer shell, which is used to fix the lifting cylinder body;

[0011] An end cover, which is located above the outer shell and is detachably connected to the outer shell. The end cover is slidably connected to the piston rod of the lifting cylinder;

[0012] Connecting component, the connecting component includes four evenly distributed mounting blocks fixed on the side wall of the top of the housing, slots are provided on the mounting blocks, and inserting rods corresponding to the positions of the slots are fixed on the end cover.

[0013] Preferably, the connecting component further includes a locking component, the locking component includes a transverse groove opened in the mounting block, the transverse groove communicates with the slot, a wedge block is slidably connected in the transverse groove, and a spring is provided between the wedge block and the side wall of the transverse groove far away from the slot, and two ends of the spring are respectively fixed on the wedge block and the side wall of the transverse groove.

[0014] Preferably, the locking component further includes a groove opened on the inserting rod, the groove is adapted to the wedge block, and an inclined angle adapted to the wedge block is provided at the bottom end of the inserting rod.

[0015] Preferably, the connecting component further includes an unlocking component, the unlocking component includes an annular plate rotatably connected to the side wall of the housing through a torsion spring, four evenly distributed arc-shaped grooves are opened on the annular plate, a sliding groove is opened on the mounting block, the sliding groove communicates with the transverse groove, a sliding rod is fixed at the bottom of the wedge block, the sliding rod is slidably connected in the sliding groove, and one end of the sliding rod far away from the wedge block is slidably connected in the arc-shaped groove.

[0016] Preferably, a heat dissipation component is further provided on the housing, the heat dissipation component includes heat dissipation holes opened on the side wall of the housing and a pressing plate fixed at the end of the piston rod of the lifting oil cylinder, an air bag is sleeved on the piston rod between the pressing plate and the end cover, and the air outlet of the air bag communicates with the inside of the housing.

[0017] Preferably, the heat dissipation holes are located on the side wall of the lower half of the housing.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1. By setting the connecting component, when installing, insert the inserting rod into the slot, and the wedge block is inserted into the groove under the action of elastic force to complete the fixation between the end cover and the housing. When disassembly and maintenance are required, rotate the annular plate, and under the action of the arc-shaped groove, the sliding rod drives the wedge block to move away from the groove. When the wedge block disengages from the groove, the end cover can be disassembled. The installation and disassembly are convenient, and this fixing method will not loosen due to the vibration during the operation of the bulldozer, and the fixing effect is better;

[0020] 2. By setting the heat dissipation component, when the lifting oil cylinder works, the piston rod reciprocates to drive the pressing plate to reciprocally press the air bag, and the gas blown out by the air bag enters the housing 1 to squeeze the hot air in the housing 1 downward and finally discharge it from the heat dissipation holes, and the heat dissipation effect is good. Description of the Drawings

[0021] Figure 1Schematic diagram of the overall structure of a protection device for the lifting cylinder of a bulldozer proposed by the present utility model;

[0022] Figure 2 Schematic diagram of the internal front view structure of a protection device for the lifting cylinder of a bulldozer proposed by the present utility model;

[0023] Figure 3 is Figure 2 Enlarged view at position A in

[0024] Figure 4 Schematic diagram of the end cover structure of a protection device for the lifting cylinder of a bulldozer proposed by the present utility model;

[0025] Figure 5 Partial structure schematic diagram of the unlocking component and locking component of a protection device for the lifting cylinder of a bulldozer proposed by the present utility model.

[0026] In the figure: 1 housing, 11 mounting block, 12 slot, 13 transverse slot, 14 wedge block, 15 spring, 16 chute, 17 slide bar;

[0027] 2 end cover, 21 insertion rod, 22 groove;

[0028] 31 annular plate, 32 arc groove;

[0029] 41 heat dissipation hole, 42 extrusion plate, 43 airbag. Specific implementation mode

[0030] The technical solutions in the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] Referring to Figures 1-5 , a protection device for the lifting cylinder of a bulldozer includes a housing 1, an end cover 2 and a connection component. The housing 1 is used to fix the lifting cylinder body. The end cover 2 is located above the housing 1 and is detachably connected to the housing 1. The end cover 2 is slidably connected to the piston rod of the lifting cylinder. A heat dissipation component is further provided on the housing 1. The heat dissipation component includes heat dissipation holes 41 opened on the side wall of the housing 1 and an extrusion plate 42 fixed to the end of the piston rod of the lifting cylinder. An airbag 43 is sleeved on the piston rod between the extrusion plate 42 and the end cover 2. The air outlet of the airbag 43 is communicated with the inside of the housing 1. The heat dissipation holes 41 are located on the lower half side wall of the housing 1 to prevent the air blown into the housing 1 by the airbag 43 from directly discharging from the heat dissipation holes 41. When the lifting cylinder works, the piston rod reciprocates up and down to drive the extrusion plate 42 to reciprocally squeeze the airbag 43. The gas blown out by the airbag 43 enters the housing 1 and squeezes the hot air inside the housing 1 downward, and finally discharges from the heat dissipation holes 41, with good heat dissipation effect.

[0032] The connecting component includes four evenly distributed mounting blocks 11 fixed on the top side wall of the housing 1. A slot 12 is provided in the mounting block 11. A plug rod 21 corresponding to the position of the slot 12 is fixed on the end cover 2. The connecting component further includes a locking component. The locking component includes a transverse slot 13 provided in the mounting block 11. The transverse slot 13 communicates with the slot 12. A wedge block 14 is slidably connected in the transverse slot 13. A spring 15 is provided between the wedge block 14 and the side wall of the transverse slot 13 away from the slot 12. Two ends of the spring 15 are respectively fixed on the wedge block 14 and the side wall of the transverse slot 13. The locking component further includes a groove 22 provided on the plug rod 21. The groove 22 is adapted to the wedge block 14. An inclined angle adapted to the wedge block 14 is provided at the bottom end of the plug rod 21. The connecting component further includes an unlocking component. The unlocking component includes an annular plate 31 rotatably connected to the side wall of the housing 1 through a torsion spring. Four evenly distributed arc-shaped slots 32 are provided on the annular plate 31. A sliding slot 16 is provided in the mounting block 11. The sliding slot 16 communicates with the transverse slot 13. A sliding rod 17 is fixed at the bottom of the wedge block 14. The sliding rod 17 is slidably connected in the sliding slot 16. One end of the sliding rod 17 away from the wedge block 14 is slidably connected in the arc-shaped slot 32. During installation, after aligning the plug rod 21 with the slot 12, the end cover 2 is pressed downward. The end cover 2 drives the plug rod 21 to move downward. After the inclined angle of the plug rod 21 contacts the wedge block 14, the wedge block 14 moves horizontally away from the plug rod 21 and compresses the spring 15. When the groove 22 is horizontally aligned with the wedge block 14, the wedge block 14 is inserted into the groove 22 under the elastic force of the spring 15, completing the installation of the end cover 2. When it is necessary to disassemble the end cover 2, the annular plate 31 is rotated. Under the action of the arc-shaped slot 32, the sliding rod 17 drives the wedge block 14 to move away from the plug rod 21. When the wedge block 14 disengages from the groove 22, the end cover 2 can be disassembled. The installation and disassembly are convenient, and this fixing method will not loosen due to the vibration during the operation of the bulldozer, and the fixing effect is better.

[0033] The functional principle of the present utility model can be described through the following operation method: During use, first fix the body of the lifting oil cylinder in the housing 1 through the prior art, then align the insertion rod 21 with the slot 12 and press down the end cover 2. The end cover 2 drives the insertion rod 21 to move downward. After the bevel angle of the insertion rod 21 contacts the wedge block 14, the wedge block 14 moves horizontally away from the insertion rod 21 and compresses the spring 15. When the groove 22 is horizontally aligned with the wedge block 14, the wedge block 14 is inserted into the groove 22 under the elastic force of the spring 15, completing the installation of the end cover 2. When it is necessary to disassemble the end cover 2, rotate the annular plate 31. Under the action of the arc-shaped groove 32, the sliding rod 17 drives the wedge block 14 to move away from the insertion rod 21. When the wedge block 14 disengages from the groove 22, the end cover 2 can be disassembled. The installation and disassembly are convenient, and this fixing method will not loosen due to the vibration during the operation of the bulldozer, and the fixing effect is better. When the lifting oil cylinder works, the piston rod reciprocates up and down to drive the pressing plate 42 to reciprocally press the airbag 43. The gas blown out by the airbag 43 enters the housing 1 and presses the hot air in the housing 1 downward and finally discharges it from the heat dissipation holes 41, with good heat dissipation effect.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. A bulldozer lifting cylinder protection device, characterized in that: include: A housing (1), wherein the housing (1) is used to fix the lifting cylinder body; An end cover (2), the end cover (2) being located above the outer shell (1) and being detachably connected to the outer shell (1), the end cover (2) being slidably connected to the piston rod of the lifting cylinder; A connection assembly, the connection assembly comprising four evenly distributed mounting blocks (11) fixed on the top side wall of the housing (1), the mounting blocks (11) being provided with slots (12), and the end cover (2) being fixed with insertion rods (21) corresponding to the positions of the slots (12).

2. A bulldozer lifting cylinder protection device according to claim 1, characterized in that: The connection assembly further comprises a locking component, the locking component comprising a transverse groove (13) provided in the mounting block (11), the transverse groove (13) being in communication with the slot (12), a wedge block (14) being slidably connected in the transverse groove (13), a spring (15) being provided between the wedge block (14) and a side wall of the transverse groove (13) away from the slot (12), and two ends of the spring (15) being respectively fixed to the wedge block (14) and the side wall of the transverse groove (13).

3. A bulldozer lifting cylinder protection device according to claim 2, characterized in that: The locking component further comprises a groove (22) formed on the insertion rod (21), the groove (22) being adapted to the wedge block (14), and the bottom end of the insertion rod (21) is provided with an oblique angle adapted to the wedge block (14).

4. A bulldozer lifting cylinder protection device according to claim 3, characterized in that: The connecting assembly also includes an unlocking component, which includes an annular plate (31) rotatably connected to the side wall of the housing (1) through a torsion spring, and the annular plate (31) is provided with four evenly distributed arc grooves (32). The mounting block (11) is provided with a slide groove (16), and the slide groove (16) is connected to the transverse groove (13). A slide rod (17) is fixed at the bottom of the wedge block (14), and the slide rod (17) is slidably connected to the slide groove (16). The end of the slide rod (17) away from the wedge block (14) is slidably connected to the arc groove (32).

5. The bulldozer lifting cylinder protection device according to claim 1, characterized in that: The outer shell (1) is also provided with a heat dissipation component, which includes a heat dissipation hole (41) opened on the side wall of the outer shell (1) and an extrusion plate (42) fixed to the end of the piston rod of the lifting cylinder, and an air bag (43) is sleeved on the piston rod between the extrusion plate (42) and the end cover (2), and the air outlet of the air bag (43) is connected to the inside of the outer shell (1).

6. A bulldozer lifting cylinder protection device according to claim 5, characterized in that: The heat dissipation hole (41) is located on the side wall of the lower half of the housing (1).

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