Excavator hydraulic cylinder fixing tool

Abstract

This utility model discloses a hydraulic cylinder fixing fixture for excavators, including a base frame and two uprights vertically fixed to the top of the base frame. Each upright is fixedly connected to the base frame with an inclined guide rod. A sliding sleeve is slidably fitted onto both guide rods, and a U-shaped frame is fixedly connected to the sliding sleeve. Guide rollers are rotatably arranged between the inner walls of the frame. A drive assembly connected to the sliding sleeve is also provided on the base frame. In this utility model, the device is moved to the hydraulic cylinder, so that the guide rollers contact the cylinder barrel. Then, the device is fixed to the ground by locking the casters and operating the locking assembly. Next, the drive assembly is operated, causing the sliding sleeve to move downwards along the guide rods, thereby gradually reducing the tilt angle of the hydraulic cylinder. This application does not require a complex fixing method to support the hydraulic cylinder, facilitating maintenance work.

Description

Technical Field

[0001] This utility model relates to the field of excavator technology, specifically to a hydraulic cylinder fixing fixture for excavators. Background Technology

[0002] Excavator hydraulic cylinders are the core actuators that enable excavators to perform various actions (such as digging, lifting, rotating, and traveling). They convert the pressure energy of hydraulic oil into mechanical energy to drive components such as the robotic arm and bucket to perform actions such as extension, retraction, and lifting. They are an indispensable key component in the excavator's hydraulic system.

[0003] Hydraulic cylinders are installed between the excavator frame and boom to enable boom swing. However, when maintenance is required (such as replacing seals, preventing hydraulic oil leakage and external impurities), steel cables are needed to lift the hydraulic cylinders to a horizontal position. If the steel cables are not properly selected (e.g., insufficient load-bearing capacity, severe wear) or the binding method is unreasonable (e.g., single-point lifting, excessive angle), local stress concentration may cause the steel cables to break, resulting in equipment damage or personal injury. It is necessary to first clear the work area, set up temporary supports (such as sleepers), and then adjust the steel cable binding position according to the length and weight of the cylinders, and check the lifting tools (such as hoists, cranes), which is time-consuming. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a hydraulic cylinder fixing fixture for excavators, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic cylinder fixing fixture for an excavator, comprising a base frame and two uprights vertically fixed to the top of the base frame. Each upright is fixedly connected to the base frame with an inclined guide rod. A sliding sleeve is slidably fitted on both guide rods. A U-shaped frame is fixedly connected to the sliding sleeve. Guide rollers are rotatably arranged between the inner walls of the frame. A drive assembly connected to the sliding sleeve is also provided on the base frame.

[0008] Preferably, the drive assembly includes a motor fixedly mounted on the base frame and a lead screw fixed to the output end of the motor. The axis of the lead screw is parallel to the axis of the guide rod. A guide sleeve is threaded onto the other end of the lead screw, and the upper end of the guide sleeve is fixedly connected to a sliding sleeve.

[0009] Preferably, casters are fixedly installed at all four corners of the bottom of the base frame.

[0010] Preferably, the bottom frame is provided with two sets of locking components. Each locking component includes a positioning rod fixed to the bottom frame, a base block fixed to the upper end of the positioning rod, and a pin movably inserted into the base block. The base block has an insertion port and a notch communicating with the insertion port. The pin passes through the insertion port. The bottom frame has a through hole, through which the pin passes. A spring is fixedly connected between the pin and the base block. A stop block is fixedly connected to the pin. When the stop block rotates to the notch, the notch allows the stop block to pass through.

[0011] Preferably, the pin is cylindrical in shape, and the diameter of the lower end of the pin gradually decreases.

[0012] Preferably, two symmetrically distributed hanging rings are fixedly connected to the frame, and the two hanging rings are distributed on both sides of the guide roller.

[0013] (III) Beneficial Effects

[0014] This utility model provides a fixing fixture for excavator hydraulic cylinders, which has the following advantages:

[0015] In this invention, the device is moved to the hydraulic cylinder so that the guide roller contacts the cylinder barrel. Then, the device is fixed to the ground by locking the caster wheel and operating the locking assembly. Next, the drive assembly is operated so that the sliding sleeve moves downward along the guide rod, thereby gradually reducing the tilt angle of the hydraulic cylinder. This application does not require a complicated fixing method to support the hydraulic cylinder, which facilitates maintenance work. Attached Figure Description

[0016] Figure 1 This is a right-side perspective view of a hydraulic cylinder fixing fixture for an excavator, as proposed in this utility model.

[0017] Figure 2 This is a left-side perspective view of a hydraulic cylinder fixing fixture for an excavator, as proposed in this utility model.

[0018] Figure 3 This utility model provides a structural diagram showing the disassembled state of a hydraulic cylinder fixing fixture for an excavator.

[0019] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0020] Figure 5 This utility model provides a working state structural diagram of a hydraulic cylinder fixing fixture for excavators.

[0021] Figure 6 This is a structural diagram of an existing excavator.

[0022] In the diagram: 1. Base frame; 101. Through hole; 2. Upright pole; 3. Guide rod; 4. Sliding sleeve; 5. Frame; 6. Guide roller; 7. Hanging ring; 8. Caster wheel; 9. Guide sleeve; 10. Lead screw; 11. Motor; 12. Base block; 121. Notch; 122. Insert; 13. Positioning rod; 14. Stop block; 15. Pin; 16. Spring; 17. Hydraulic cylinder; 18. Boom; 19. Main frame. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figures 1 to 2 This utility model provides a technical solution: a hydraulic cylinder fixing fixture for an excavator, including a base frame 1, two uprights 2 vertically fixed to the top of the base frame 1, each upright 2 being fixedly connected to the base frame 1 with an inclined guide rod 3, a sliding sleeve 4 being slidably sleeved on the two guide rods 3, a U-shaped frame 5 being fixedly connected to the sliding sleeve 4, guide rollers 6 being rotatably arranged between the inner walls of the frame 5, and a drive assembly connected to the sliding sleeve 4 being provided on the base frame 1.

[0025] First, it should be noted that, as Figure 6 As shown, two hydraulic cylinders 17 are installed between the boom 18 and the frame 19. The two ends of the hydraulic cylinder 17 are hinged to the boom 18 and the frame 19 respectively. When it is necessary to replace the seals at the end of one of the hydraulic cylinders 17, the end of the hydraulic cylinder 17 connected to the boom 18 must first be disassembled, and then the hydraulic cylinder 17 is gradually tilted to the operating position.

[0026] Reference Figure 5 In specific operation, the device is moved to the hydraulic cylinder 17 so that the guide roller 6 contacts the cylinder barrel of the hydraulic cylinder 17. Then, the device is fixed to the ground by locking the caster wheel 8 and operating the locking assembly. Next, the drive assembly is operated so that the sliding sleeve 4 moves downward along the guide rod 3, thereby gradually reducing the tilt angle of the hydraulic cylinder 17. This application does not require a complicated fixing method to support the hydraulic cylinder 17, which is convenient for maintenance work. In addition, during this process, the guide roller 6 rolls along the surface of the hydraulic cylinder 17, and the instantaneous friction force at the rolling friction contact point is greatly reduced, which can effectively protect the cylinder barrel surface from damage.

[0027] Specifically, refer to Figure 1The drive assembly includes a motor 11 fixedly mounted on the base frame 1 and a lead screw 10 fixed to the output end of the motor 11. The axis of the lead screw 10 is parallel to the axis of the guide rod 3. The other end of the lead screw 10 is threaded with a guide sleeve 9, and the upper end of the guide sleeve 9 is fixedly connected to the sliding sleeve 4.

[0028] Start motor 11 to drive lead screw 10 to rotate. Lead screw 10 drives guide sleeve 9 to move linearly. Guide sleeve 9 pulls sliding sleeve 4 to move downward along guide rod 3, so that the height of guide roller 6 gradually decreases, thereby making the tilt angle of hydraulic cylinder 17 gradually decrease, and finally adjust to the maintenance operation position. After the maintenance is completed, motor 11 can be started in reverse to drive sliding sleeve 4 to move upward along guide rod 3, so that hydraulic cylinder 17 swings back to reset.

[0029] Reference Figure 1 The bottom frame 1 has four casters 8 fixedly installed at the four corners.

[0030] The universal wheels 8 allow for easy and flexible movement of the device. The universal wheels 8 can also adopt a self-locking structure for easy locking. The self-locking universal wheels 8 can convert the sliding friction between the device and the ground into static friction by locking the wheel body (such as the brake pads being tightly fitted to the wheel hub), preventing the device from shifting as a whole and ensuring that the guide rollers 6 and the cylinder barrel are always stably fitted.

[0031] Reference Figure 3 and Figure 4 The base frame 1 is provided with two sets of locking components. The locking components include a positioning rod 13 fixed to the base frame 1, a base block 12 fixed to the upper end of the positioning rod 13, and a pin 15 movably inserted into the base block 12. The base block 12 has an insertion port 122 and a notch 121 communicating with the insertion port 122. The pin 15 is set through the insertion port 122. The base frame 1 has a through hole 101. The pin 15 is set through the through hole 101. A spring 16 is fixedly connected between the pin 15 and the base block 12. A stop block 14 is fixedly connected to the pin 15. When the stop block 14 is rotated to the notch 121, the notch 121 allows the stop block 14 to pass through. The pin 15 is a cylindrical structure, and the diameter of the lower end of the pin 15 gradually decreases.

[0032] When the device moves to the working position, the pin 15 is rotated so that the stop 14 of the pin 15 corresponds to the position of the notch 121. At this time, the spring 16 pushes the pin 15 downward so that the stop 14 passes through the notch 121 and the lower end of the pin 15 contacts the ground, increasing friction and preventing the device from moving. In most cases, the excavator operates on soil, so the diameter of the lower end of the pin 15 gradually decreases, making it easier to insert into the soil. After the conical pin 15 is inserted into the soil, it has the function of preventing the movement of the device, thereby improving the stability during maintenance.

[0033] When it is necessary to release the lock, pull the pin 15 upward and rotate the pin 15 so that the stop 14 comes into contact with the top of the base block 12, and the base block 12 achieves the purpose of limiting the stop 14.

[0034] In addition, as another implementation, two symmetrically distributed hanging rings 7 are fixedly connected to the frame 5, with the two hanging rings 7 distributed on both sides of the guide roller 6.

[0035] A steel chain can be installed between the two hanging rings 7. After the hydraulic cylinder 17 is adjusted to the maintenance position, the upper side of the hydraulic cylinder 17 can be fixed to ensure stability during maintenance. Hanging rings (compatible with U-shaped shackles) are welded to both ends of the steel chain. Both the hanging rings 7 and the hanging rings are designed as annular structures that can pass through the U-shaped shackles. A U-shaped shackle (with bolts) is selected, and the U-shaped part of the shackle passes through both the hanging rings and the hanging rings 7 of the steel chain at the same time. The above connection method is the existing technology.

[0036] 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. A hydraulic cylinder fixing fixture for an excavator, characterized in that: Includes a base frame (1) and two uprights (2) vertically fixed to the top of the base frame (1). Each upright (2) is fixedly connected to the base frame (1) with an inclined guide rod (3). A sliding sleeve (4) is slidably fitted on the two guide rods (3). A U-shaped frame (5) is fixedly connected to the sliding sleeve (4). A guide roller (6) is rotatably arranged between the inner walls of the frame (5). A drive assembly connected to the sliding sleeve (4) is also provided on the base frame (1).

2. The hydraulic cylinder fixing fixture for an excavator according to claim 1, characterized in that: The drive assembly includes a motor (11) fixedly mounted on the base frame (1) and a lead screw (10) fixed to the output end of the motor (11). The axis of the lead screw (10) is parallel to the axis of the guide rod (3). The other end of the lead screw (10) is threaded with a guide sleeve (9). The upper end of the guide sleeve (9) is fixedly connected to the sliding sleeve (4).

3. The hydraulic cylinder fixing fixture for an excavator according to claim 1, characterized in that: The bottom frame (1) is fixedly equipped with casters (8) at the four corners of the bottom.

4. The hydraulic cylinder fixing fixture for an excavator according to claim 1, characterized in that: Two sets of locking components are provided on the bottom frame (1). The locking components include a positioning rod (13) fixed on the bottom frame (1), a base block (12) fixed on the upper end of the positioning rod (13), and a pin (15) movably inserted into the base block (12). The base block (12) has an insertion port (122) and a notch (121) communicating with the insertion port (122). The pin (15) passes through the insertion port (122). The bottom frame (1) has a through hole (101). The pin (15) passes through the through hole (101). A spring (16) is fixedly connected between the pin (15) and the base block (12). A stop block (14) is fixedly connected to the pin (15). When the stop block (14) rotates to the notch (121), the notch (121) allows the stop block (14) to pass through.

5. The hydraulic cylinder fixing fixture for an excavator according to claim 4, characterized in that: The pin (15) is cylindrical in shape, and the diameter of the lower end of the pin (15) gradually decreases.

6. The hydraulic cylinder fixing fixture for an excavator according to claim 1, characterized in that: Two symmetrically distributed hanging rings (7) are fixedly connected to the frame (5), and the two hanging rings (7) are distributed on both sides of the guide roller (6).

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