Multifunctional hydraulic wrist

Abstract

The utility model discloses a multifunctional hydraulic wrist which comprises an excavator body and an upper connecting frame, the upper end of the upper connecting frame is connected with the excavator body through a connecting piece, a double-cross roller driver is installed at the lower end of the upper connecting frame, and a lower connecting frame is installed at the lower end of the double-cross roller driver. A pair of clamping oil cylinders is installed on the left side and the right side of the lower connecting frame, clamping claws are installed at the driving ends of the clamping oil cylinders, a locking oil cylinder is installed at the lower end of the lower connecting frame, a pair of accessory locking pins is installed on the two sides of the locking oil cylinder, and a pair of swing angle oil cylinders is installed at the left end and the right end of the upper connecting frame. According to the hydraulic wrist provided by the utility model, the slewing bearing with the crossed pin rollers is adopted, so that when the excavator is used, the operation angle can be freely changed through the hydraulic wrist under the condition that the chassis of the excavator does not move, meanwhile, accessories can be quickly replaced, multiple purposes of one machine are realized, the construction efficiency of the excavator is greatly improved, and the construction cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of engineering machinery technology, and specifically relates to a multifunctional hydraulic wrist. Background Technology

[0002] The hydraulic wrist, driven by a hydraulic system, enables the excavator to rotate and swing flexibly in all directions, ensuring that the bucket can accurately reach the working position, thereby improving the accuracy and efficiency of the operation.

[0003] Current excavators with hydraulic wrist actuators can only operate in one direction and cannot freely change the working direction. Furthermore, the existing hydraulic wrist actuators use ball-type slewing bearings, which suffer from poor stability and sensitivity. Therefore, in complex working environments and confined spaces, constant adjustments to the chassis position are required, and ideal working results are not achieved, thus limiting the excavator's construction efficiency and increasing construction costs.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a multifunctional hydraulic wrist that can solve the problems of low construction efficiency and high construction cost caused by the need for excavators to constantly adjust the chassis position when working in complex and narrow working ranges.

[0006] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0007] A multi-functional hydraulic wrist includes an excavator body and an upper connecting frame. The upper end of the upper connecting frame is connected to the excavator body via a connector, facilitating installation and enabling the excavator to drive the hydraulic wrist for digging and extension functions. A double-cross roller drive, a worm gear structure, is installed at the lower end of the upper connecting frame. Driven by a hydraulic motor, it can rotate 360 ​​degrees, allowing the excavator to work in multiple directions. The double-cross roller drive also improves the strength and rigidity of the connection. A lower connecting frame is installed at the lower end of the double-cross roller drive. A pair of clamping cylinders are installed on both sides of the lower connecting frame. Each clamping cylinder has a clamping claw at its drive end. The clamping claws are operated by the clamping cylinders, improving the excavator's operating efficiency. A locking cylinder is installed at the lower end of the lower connecting frame. A pair of attachment locking pins are installed on both sides of the locking cylinder. The cooperation of the locking cylinder and the attachment locking pins allows for quick replacement and connection with different attachments, enabling the hydraulic wrist to quickly change attachments according to usage requirements. A pair of swing cylinders are installed at both ends of the upper connecting frame. These swing cylinders are respectively installed on the left and right sides of the double-cross roller drive. The extension and retraction of the swing cylinders allows the lower connecting frame attachments to swing left and right at multiple angles.

[0008] In one or more embodiments of this utility model, the upper end of the double cross roller drive and the lower end of the upper connecting frame are connected by a pin, so that the connection between the upper connecting frame and the double cross roller drive is stable while facilitating swinging between them.

[0009] In one or more embodiments of this utility model, the lower end of the double cross roller drive is connected to the lower connecting frame by bolts, and the connection between the double cross roller drive and the lower connecting frame is stable by bolts.

[0010] In one or more embodiments of this utility model, a rotary motor is mounted on the double cross roller drive, and the rotary motor is mounted on the double cross roller drive to provide rotational power for the rotary drive.

[0011] In one or more embodiments of this utility model, a rotary valve is installed in the middle of the double cross roller drive. The rotary valve is installed in the center of the double cross roller drive to realize the reversal and transmission of hydraulic oil circuit.

[0012] In one or more embodiments of this utility model, the cylinder body of the swing angle cylinder is connected to the upper connecting frame, and the piston rod of the swing angle cylinder is driven by a double cross roller. The lower connecting frame attachment can be swinged left and right at multiple angles by extending and retracting the swing angle cylinder.

[0013] In one or more embodiments of this utility model, the cylinder bodies of a pair of clamping cylinders are respectively mounted on a lower connecting frame, and the cylinder bodies of the clamping cylinders are connected to the lower connecting frame by a pin.

[0014] In one or more embodiments of this utility model, the piston rods of the pair of clamping cylinders are connected to the clamping claws by a pin. The clamping and releasing are achieved by the extension and retraction of the cylinders driving the movement of the clamping claws, allowing the clamping claws to clamp and release to perform operations under different working conditions.

[0015] Compared with the prior art, the hydraulic wrist provided by this utility model adopts a slewing bearing with cross rollers, which allows the excavator chassis to freely change the working angle through the hydraulic wrist without moving during the use of the excavator. At the same time, it can quickly change attachments, realize multiple uses of one machine, greatly improve the construction efficiency of the excavator and reduce the construction cost. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a multifunctional hydraulic wrist according to one embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of a multifunctional hydraulic wrist according to an embodiment of the present invention;

[0019] Figure 3 This is a right view of a multifunctional hydraulic wrist according to one embodiment of the present invention;

[0020] Figure 4 This is an inverted view of a multifunctional hydraulic wrist according to one embodiment of the present invention;

[0021] Figure 5 This is a perspective view of a multifunctional hydraulic wrist according to one embodiment of the present invention.

[0022] Explanation of key figure labels:

[0023] 1-Upper connecting frame, 2-Double cross roller drive, 3-Lower connecting frame, 4-Locking cylinder, 5-Attachment locking pin, 6-Rotation motor, 7-Rotation valve, 8-Swing cylinder, 9-Clamping cylinder, 10-Clamping claw. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0025] like Figures 1-5 As shown, a multifunctional hydraulic wrist in one embodiment of this utility model includes an excavator body and an upper connecting frame 1. The hydraulic wrist is installed on the excavator. With the hydraulic wrist provided by this application, when the excavator is working in a complex working range and narrow and restricted environment, the excavator can freely change the working angle without adjusting the position of the chassis, and can quickly change attachments. This solves the problem of low construction efficiency and high construction cost caused by the constant adjustment of the excavator chassis position.

[0026] like Figures 1-5 As shown, the upper end of the upper connecting frame 1 is connected to the excavator body via a connector. This connector facilitates installation between the upper connecting frame 1 and the excavator body, and also enables the excavator to drive the hydraulic wrist to perform digging and extension functions. A double-cross roller drive 2 is installed at the lower end of the upper connecting frame 1. The double-cross roller drive 2 is a worm gear structure, driven by a hydraulic motor to achieve 360-degree rotation, allowing the excavator to work in multiple directions. The double-cross roller drive 2 also improves the strength and rigidity of the connection. A lower connecting frame 3 is installed at the lower end of the double-cross roller drive 2. A pair of clamping cylinders 9 are installed on the left and right sides of the lower connecting frame 3. Each clamping cylinder 9 has a clamping claw 10 installed at its drive end. The clamping cylinders 9 drive the clamping claws 10 to operate, improving the excavator's operating efficiency. A locking cylinder 4 is installed at the lower end of the lower connecting frame 3. A pair of attachment locking pins 5 are installed on both sides of the locking cylinder 4. The cooperation between the locking cylinder 4 and the attachment locking pins 5 allows for quick replacement and connection with different attachments. This enables the hydraulic wrist to quickly change attachments according to usage requirements. A pair of swing cylinders 8 are installed at the left and right ends of the upper connecting frame 1. The pair of swing cylinders 8 are respectively installed on the left and right sides of the double cross roller drive 2. The extension and retraction of the swing cylinders 8 allows the lower connecting frame 3 and the attachments to swing left and right at multiple angles.

[0027] Preferably, by using the double cross roller drive 2 as the slewing bearing of the hydraulic wrist, the problems of poor stability and poor sensitivity of the traditional roller slewing bearing are changed. This allows the excavator to drive the hydraulic wrist to freely change the working angle while improving the stability and sensitivity of the operation.

[0028] like Figure 1 and Figure 2 As shown, the upper end of the double cross roller drive 2 is connected to the lower end of the upper connecting frame 1 by a pin, which makes the connection between the upper connecting frame 1 and the double cross roller drive 2 stable while allowing them to swing relative to each other.

[0029] like Figure 1 and Figure 2 As shown, the lower end of the double cross roller drive 2 is connected to the lower connecting frame 3 by bolts, and the connection between the double cross roller drive 2 and the lower connecting frame 3 is stable by bolts.

[0030] like Figure 1 As shown, a rotary motor 6 is mounted on the double cross roller drive 2, and the rotary motor 6 provides rotational power for the rotary drive.

[0031] like Figure 1 and Figure 4 As shown, a rotary valve 7 is installed in the middle of the double cross roller drive 2. The rotary valve 7 is installed in the center of the double cross roller drive 2 to realize the reversal and transmission of hydraulic oil circuit.

[0032] like Figure 1 As shown, the cylinder body of the swing cylinder 8 is connected to the upper connecting frame 1, and the piston rod of the swing cylinder 8 is connected to the double cross roller drive 2. The lower connecting frame 3 and the attachment can be swinged left and right at multiple angles by the extension and retraction of the swing cylinder 8.

[0033] like Figure 4 As shown, the cylinder bodies of a pair of clamping cylinders 9 are respectively mounted on the lower connecting frame 3, and the cylinder bodies of the clamping cylinders 9 are connected to the lower connecting frame 3 by a pin.

[0034] like Figure 4 As shown, the piston rods of a pair of clamping cylinders 9 are connected to the clamping jaws 10 by a pin. The clamping jaws 10 are moved by the extension and retraction of the cylinders to achieve clamping and releasing, and the clamping jaws 10 can clamp and release to achieve different working conditions.

[0035] It should be noted that the hydraulic wrist provided in this application uses a ball-type slewing bearing.

[0036] In use, the upper connecting frame 1 is installed on the excavator via the connector. When the excavator is working in a confined space, the double cross roller drive 2 rotates 360 degrees, allowing the excavator to work in multiple directions. The extension and retraction of the swing cylinder 8 drives the lower connecting frame 3 and attachments to swing left and right at multiple angles. At the same time, the rotary motor 6 provides power for the rotation of the double cross roller drive 2, allowing the excavator to freely change the working angle without adjusting the chassis when working in a confined space, thereby improving the excavator's working efficiency. When the excavator is in use and the attachments are changed, the locking cylinder 4 and the attachment locking pin 5 work together to allow different attachments to be changed quickly.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-functional hydraulic wrist, comprising an excavator body and an upper connecting frame, characterized in that, The upper end of the upper connecting frame is connected to the excavator body via a connector. A double cross roller drive is installed at the lower end of the upper connecting frame, and a lower connecting frame is installed at the lower end of the double cross roller drive. A pair of clamping cylinders are installed on the left and right sides of the lower connecting frame, and clamping claws are installed on the drive ends of each pair of clamping cylinders. A locking cylinder is installed at the lower end of the lower connecting frame, and a pair of attachment locking pins are installed on both sides of the locking cylinder. A pair of swing cylinders are installed at the left and right ends of the upper connecting frame, and the pair of swing cylinders are respectively installed on the left and right sides of the double cross roller drive.

2. The multifunctional hydraulic wrist according to claim 1, characterized in that, The upper end of the double cross roller drive is connected to the lower end of the upper connecting frame by a pin.

3. A multifunctional hydraulic wrist according to claim 2, characterized in that, The lower end of the double cross roller drive is connected to the lower connecting frame by bolts.

4. A multifunctional hydraulic wrist according to claim 1, characterized in that, A rotary motor is mounted on the double cross roller drive.

5. A multifunctional hydraulic wrist according to claim 4, characterized in that, A rotary valve is installed in the middle of the double-cross roller drive.

6. A multifunctional hydraulic wrist according to claim 1, characterized in that, The cylinder body of the swing angle cylinder is connected to the upper connecting frame, and the piston rod of the swing angle cylinder is driven by a double cross roller.

7. A multifunctional hydraulic wrist according to claim 1, characterized in that, The cylinder bodies of the pair of clamping cylinders are respectively mounted on the lower connecting frame, and the cylinder bodies of the clamping cylinders are connected to the lower connecting frame by a pin.

8. A multifunctional hydraulic wrist according to claim 7, characterized in that, The piston rods of the pair of clamping cylinders are connected to the clamping jaws by a pin.

Images