A self-positioning hydraulic quick-change device based on open and closed hydraulic joints at both ends

Abstract

The invention discloses a self-positioning hydraulic quick-change device based on hydraulic joints with open and closed ends. The upper shell is installed on the lower shell, and slider accommodating grooves matching sliders are arranged at the left and right ends of the upper shell. The slider is slidably connected to the slider accommodating grooves, and the rear end of the hydraulic female joint and the front end of the transition joint are fixedly connected to the slider. The rear end of the hydraulic female joint is sealed and fixedly connected to the front end of the transition joint. Both the hydraulic female joint and the transition joint move together with the slider; the male head of the hydraulic joint is installed on the lower connecting frame, and the fixed rear end of the small electric push rod is installed on the slider. The front end of the small electric push rod is fixedly connected to the locking ring holder, and the locking ring holder is sleeved on the locking ring of the hydraulic female joint. When working, the small electric push rod drives the locking ring holder to move and pushes away the locking ring of the hydraulic female joint, so that the male head of the hydraulic joint is conveniently inserted into the locking ring of the hydraulic female joint.

Description

Technical Field

[0001] The invention relates to a self-positioning hydraulic quick-change device based on open-and-closed hydraulic joints at both ends, belonging to the technical field of engineering machinery. Background Art

[0002] After a disaster occurs, professional emergency rescue equipment is needed to quickly complete various complex rescue tasks and reduce the loss of life and property of the affected people. Professional emergency rescue equipment must be efficient and multifunctional. Due to the limitations of the use, storage, and deployment of professional emergency rescue equipment, the most commonly used engineering machinery equipment, such as excavators, bulldozers, cranes, and breakers, is currently being invested in earthquake rescue operations. These equipment are often the main equipment in earthquake rescue because of their good versatility and strong applicability, and can be deployed over a large area. However, due to the limitations of their working attributes, the functions of engineering machinery equipment are single, the interchangeability of operating accessories is poor, the disassembly and assembly of accessories is complex and time-consuming, and manual operation by on-site staff is required, which results in low rescue efficiency. In addition, considering that traffic in the disaster-stricken areas is limited, it is often impossible to allow multiple engineering machinery equipment to work together at the same time. Therefore, a device or an operating arm is required to realize multiple functions such as grabbing and handling, demolition and shearing, and pushing and excavating. At the same time, due to the complex on-site environment, there will be various dangerous factors, and the operator is not allowed to disassemble and assemble the accessories, so it is necessary to meet the requirements of automatic and rapid switching of operating accessories.

[0003] The key technology of the quick-change device for emergency rescue equipment is the design of the automatic on-off scheme of the hydraulic oil circuit of the accessories. Although the traditional butt joint is widely used, it requires the participation of personnel and cannot meet the requirements of unmanned automatic operation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a self-positioning hydraulic quick-change device based on open and closed hydraulic joints at both ends, which can realize automatic centering of the male and female heads of the hydraulic joints and disconnection and locking of the hydraulic oil circuit, so as to solve the problem that when the existing emergency rescue equipment replaces the working accessories, the accessories are difficult to automatically connect with the hydraulic oil circuit of the working host, resulting in the need for manual participation in the replacement of working accessories, a long time consumption and poor safety.

[0005] To achieve the above-mentioned purpose, the present invention provides a self-positioning hydraulic quick-change device based on a hydraulic joint with open and closed ends, comprising an upper connecting frame and a lower connecting frame, wherein the upper connecting frame comprises an upper shell, a plurality of transition joints, a plurality of small electric push rods, a slider, a plurality of hydraulic joint female heads, a plurality of hydraulic female joint locking rings and a plurality of locking ring holders,

[0006] The lower connecting frame includes a lower shell and several hydraulic joint male heads.

[0007] The upper shell is installed on the lower shell, and the left and right ends of the upper shell are provided with slider receiving grooves matching the slider, the slider is slidably connected to the slider receiving groove, the rear end of the hydraulic female joint and the front end of the transition joint are fixedly connected to the slider, the rear end of the hydraulic female joint is sealed and fixedly connected to the front end of the transition joint, and the hydraulic female joint and the transition joint both move together with the slider;

[0008] The male head of the hydraulic connector is installed on the lower connecting frame, the fixed rear end of the small electric push rod is installed on the slider, the front end of the small electric push rod is fixedly connected to the locking ring holder, and the locking ring holder is sleeved on the locking ring of the hydraulic female connector. When working, the small electric push rod drives the locking ring holder to move and push away the locking ring of the hydraulic female connector, so as to facilitate the insertion of the male head of the hydraulic connector into the locking ring of the hydraulic female connector.

[0009] Preferably, it comprises a plurality of nylon sliders and a plurality of nylon stoppers, which are fixedly mounted on the slider receiving groove and used for limiting the slider; the slider moves left and right in the upper shell through the plurality of nylon sliders.

[0010] Preferably, it includes a connecting pin, the rear end of which is fixedly mounted on the slider, and pin holes matching the pin are provided on both sides of the front end of the upper shell. The pin passes through the pin holes, and the connecting pin moves with the slider.

[0011] Preferably, it includes a linear slide rail and a main electric push rod. The linear slide rail is fixedly installed at the rear end of the upper shell, the rear end of the main electric push rod is installed on the linear slide rail, the front end of the main electric push rod is connected to the slider, the main electric push rod pushes the slider to move forward and backward, and the main electric push rod moves left and right in the upper shell through the linear slide rail.

[0012] Preferably, a positioning column is included, a positioning hole matching the positioning column is provided at the front end of the lower shell, and a rear end of the positioning column is fixedly mounted on the slider, and the positioning column moves with the slider.

[0013] Preferably, the lower connecting frame includes a first shaft and a second shaft, the first shaft is fixed at the front end of the lower shell, and the second shaft is fixed at the rear end of the lower shell. During operation, the pin passes through the pin through hole and is stuck under the first shaft.

[0014] Preferably, the lower connecting frame includes a connecting block, which is fixed on the first axis. A male through hole matching the male head of the hydraulic connector is provided in the front-to-back direction on the connecting block, and the middle end of the male head of the hydraulic connector is fixed on the male through hole.

[0015] The beneficial effects achieved by the present invention are:

[0016] The present invention has two parts, the upper connecting frame and the lower connecting frame, and uses a main electric push rod to drive the female head with a hydraulic joint with open and close ends, and uses a small electric push rod to control the opening and closing of the hydraulic female joint locking ring of the hydraulic joint female head. The entire movable slider device is installed on the upper shell through a linear slide rail and can move on the upper shell. The positioning column can guide the slider to move with the positioning hole of the lower connecting frame to guide the male head and female head to dock. The present invention uses the main electric push rod as a drive, which is convenient for control; the positioning hole can guide the docking of the hydraulic joint, which is easy for a low-precision hydraulic mechanical arm to complete the replacement of accessories; the ISO7241 hydraulic joint with open and close ends used in this device can be locked after docking, which can reduce the oil leakage of the hydraulic oil circuit connection and make the hydraulic oil circuit connection safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a stereogram of the device;

[0018] Figure 2 It is a bottom view of the upper connecting frame in the device;

[0019] Figure 3 It is a three-dimensional diagram of the lower connecting frame in the device;

[0020] Figure 4 It is a cross-sectional view of the hydraulic joint male and the hydraulic female joint locking ring disconnected in the device;

[0021] Figure 5 It is a cross-sectional view of the connection and locking of the hydraulic joint male head and the hydraulic female joint locking ring in the device;

[0022] Figure 6 It is a cross-sectional view of the locking ring of the hydraulic female joint in the device in the locked state;

[0023] Figure 7 It is a cross-sectional view of the locking ring of the hydraulic female joint in the device in the opened state;

[0024] Figure 8 It is a stereoscopic view of the hydraulic connector male and the hydraulic connector female locking ring being disconnected in the device.

[0025] Meaning of the reference numerals: 1-upper housing, 2-linear guide rail, 3-main electric push rod, 4-transition joint, 5-nylon slider, 6-nylon stopper, 7-connecting pin, 8-small electric push rod, 9-slider, 10-positioning column, 11-hydraulic connector female head, 12-hydraulic connector locking ring, 13-locking ring holder, 14-lower housing, 15-first shaft, 16-hydraulic connector male head, 17-positioning hole, 18-connecting block, 19-second shaft, 20-steel ball, 21-positioning groove. DETAILED DESCRIPTION

[0026] The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and are not intended to limit the protection scope of the present invention.

[0027] It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention, they are only used to explain the relative position relationship and movement status of the various components under a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, if the descriptions of "first" and "second" etc. are involved in the present invention, they are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] A self-positioning hydraulic quick-change device based on a hydraulic joint with two ends opened and closed, comprising an upper connecting frame and a lower connecting frame, wherein the upper connecting frame comprises an upper shell 1, a plurality of transition joints 4, a plurality of small electric push rods 8, a slider 9, a plurality of hydraulic joint female heads 11, a plurality of hydraulic female joint locking rings 12 and a plurality of locking ring holders 13,

[0032] The lower connecting frame includes a lower housing 14 and a plurality of hydraulic joint male heads 16.

[0033] The upper shell 1 is mounted on the lower shell 14. The left and right ends of the upper shell 1 are provided with slider receiving grooves matching the slider 9. The slider 9 is slidably connected to the slider receiving grooves. The rear end of the hydraulic female joint 11 is fixedly connected to the front end of the transition joint 4 on the slider 9. The rear end of the hydraulic female joint 11 is sealed and fixedly connected to the front end of the transition joint 4. The hydraulic female joint 11 and the transition joint 4 both move together with the slider 9.

[0034] The hydraulic connector male head 16 is installed on the lower connecting frame, the small electric push rod 8 is fixed at the rear end and installed on the slider 9, the front end of the small electric push rod 8 is fixedly connected to the locking ring holder 13, and the locking ring holder 13 is sleeved on the hydraulic female connector locking ring 12. When working, the small electric push rod 8 drives the locking ring holder 13 to move and open the hydraulic female connector locking ring 12, so as to facilitate the insertion of the hydraulic connector male head 16 into the hydraulic female connector locking ring 12.

[0035] Furthermore, the present embodiment includes a plurality of nylon sliders 5 and a plurality of nylon stoppers 6 , which are fixedly mounted on the slider receiving grooves and used to limit the slider 9 ; the slider 9 moves left and right in the upper housing 1 through the plurality of nylon sliders 5 .

[0036] Furthermore, the present embodiment includes a connecting pin 7, the rear end of which is fixedly mounted on the slider 9, and pin holes matching the pin 7 are provided on both sides of the front end of the upper shell 1, through which the pin 7 passes, and the connecting pin 7 moves with the slider 9.

[0037] Furthermore, the present embodiment includes a linear slide rail 2 and a main electric push rod 3. The linear slide rail 2 is fixedly mounted on the rear end of the upper shell 1. The rear end of the main electric push rod 3 is mounted on the linear slide rail 2. The front end of the main electric push rod 3 is connected to the slider 9. The main electric push rod 3 pushes the slider 9 to move forward and backward. The main electric push rod 3 moves left and right in the upper shell 1 through the linear slide rail 2.

[0038] Furthermore, the present embodiment includes a positioning column 10 , a positioning hole 17 cooperating with the positioning column 10 is provided at the front end of the lower shell 14 , and the rear end of the positioning column 10 is fixedly mounted on the slider 9 , and the positioning column 10 moves together with the slider 9 .

[0039] Furthermore, in this embodiment, the lower connecting frame includes a first shaft 15 and a second shaft 19, the first shaft 15 is fixed at the front end of the lower shell 14, and the second shaft 19 is fixed at the rear end of the lower shell 14. When working, the pin shaft 7 passes through the pin shaft through hole and is stuck under the first shaft 15.

[0040] Furthermore, in this embodiment, the lower connecting frame includes a connecting block 18, which is fixed on the first shaft 15. The connecting block 18 has a male through hole for matching the hydraulic connector male 16 in the front and rear directions, and the middle end of the hydraulic connector male 16 is fixed on the male through hole.

[0041] The positioning groove 20 provided on the male end of the hydraulic connector is engaged with the steel ball installed on the locking ring 12 of the hydraulic female connector in the locked state. The upper shell 1 and the lower shell 14 are block-shaped objects, the nylon slider 5, the nylon stopper 6, and the slider 9 are block-shaped objects, the positioning column 10 is a cylindrical rod, the locking ring holder 13 is annular in shape, the first shaft 15 and the second shaft 19 are cylindrical rods,

[0042] There are many types of linear guide rails 2, main electric push rods 3, transition joints 4, connecting pins 7, small electric push rods 8, hydraulic connector female head 11, hydraulic connector female locking ring 12, hydraulic connector male head 16, connecting blocks 18, and steel balls 20. The above components can be used in many types in the prior art, and those skilled in the art can select appropriate types according to actual needs. This embodiment will not give examples one by one.

[0043] The hydraulic female connector 11, the hydraulic female connector locking ring 12 and the hydraulic connector male connector 16 used in the present invention are both ends of the open and closed ISO7241 hydraulic connector. The structural diagram of the connector is shown in FIG. Figure 4 As shown, it is necessary to use a small electric push rod 8 to push open the locking ring 12 of the hydraulic female connector, and then connect the hydraulic female connector 11 and the hydraulic connector male head 16, and then loosen the locking ring 12 of the hydraulic female connector, and reset it under the action of the spring force, so that the steel ball 20 and the positioning groove 21 are stuck, and finally the entire connector is connected and locked; the design of the present invention can use a small electric push rod to automatically complete the above-mentioned connection and locking process, without manual participation, greatly improving the connection efficiency of the hydraulic connector and improving safety; at the same time, thanks to the good locking and airtightness of the ISO7421 hydraulic connector, the locking and sealing properties of the present invention after the connection is completed can be guaranteed.

[0044] The present invention uses the linear slide rail 2 and the positioning column 10 to automatically guide the hydraulic female connector 11 and the hydraulic connector male connector 16 to align and connect during the connection process of the upper and lower connecting frames.

[0045] The power device used in the present invention is a small electric push rod, which has simple control and compact structure. Different types of electric push rods can be selected according to different usage requirements, and positioning and other operations can be easily achieved.

[0046] The overall structure of the self-positioning hydraulic quick-change device based on the open-closed hydraulic joints at both ends designed by the present invention is as follows: Figure 1As shown, the specific working process of the whole mechanism is as follows: when connecting, the upper connecting frame is first aligned with the lower connecting frame, and then the small electric push rod 8 drives the locking ring holder 13 to open the locking ring 12 of the hydraulic joint female head, such as Figure 6 Then the main electric push rod 3 drives the slider 9 to move, and the hydraulic female connector 11 and the hydraulic connector male connector 16 are connected. During the connection process, the positioning column 10 on the slider 9 is aligned with the positioning hole 17 on the connection block 18. The end of the positioning column 10 and the entrance of the positioning hole 17 are rounded and can be wedged under the force of the main electric push rod. Figure 8 During this process, the positioning column 10 will drive the slider 9 to move relative to the upper housing 1. After the positioning column 10 and the positioning hole 17 are aligned and engaged, the female hydraulic connector 11 and the male hydraulic connector 16 can be aligned;

[0047] After the alignment of the female hydraulic connector 11 and the male hydraulic connector 16 is completed, the small electric push rod 8 drives the locking ring holder 13 to close the locking ring 12 of the female hydraulic connector. Figure 7 , realize the locking of the hydraulic joint. When the hydraulic joint is connected, the connecting pin shaft 7 of the upper connecting frame extends out from under the stuck first shaft 15, and the upper and lower connecting frames are locked, and the attachment can follow the robot arm to perform related operations;

[0048] When disconnecting, first the small electric push rod 8 drives the locking ring holder 13 to open the hydraulic connector female locking ring 12, thereby releasing the lock of the hydraulic connector female 11 and the hydraulic connector male 16, and then the main electric push rod 3 drives the slider 9 to move, thereby disconnecting the hydraulic connector female 11 and the hydraulic connector male 16.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A self-positioning hydraulic quick-change device based on open and closed hydraulic joints at both ends, It is characterized in that The invention comprises an upper connecting frame and a lower connecting frame, wherein the upper connecting frame comprises an upper shell (1), a plurality of transition joints (4), a plurality of small electric push rods (8), a slide block (9), a plurality of hydraulic female joints (11), a plurality of hydraulic female joint locking rings (12) and a plurality of locking ring holders (13). The lower connecting frame includes a lower housing (14) and a plurality of hydraulic joint male heads (16). The upper shell (1) is mounted on the lower shell (14); the upper shell (1) has slider receiving grooves matching the slider (9) at both left and right ends; the slider (9) is slidably connected to the slider receiving grooves; the rear end of the hydraulic female joint (11) and the front end of the transition joint (4) are fixedly connected to the slider (9); the rear end of the hydraulic female joint (11) is sealed and fixedly connected to the front end of the transition joint (4); the hydraulic female joint (11) and the transition joint (4) both move together with the slider (9); The hydraulic joint male head (16) is mounted on the lower connecting frame, and the positioning groove (21) provided on the hydraulic joint male head engages with the steel ball (20) mounted on the hydraulic female joint locking ring (12) in the locked state; the small electric push rod (8) is fixedly mounted on the slider (9) at the rear end, and the front end of the small electric push rod (8) is fixedly connected to the locking ring holder (13), and the locking ring holder (13) is sleeved on the hydraulic female joint locking ring (12). When working, the small electric push rod (8) drives the locking ring holder (13) to move and push away the hydraulic female joint locking ring (12), so as to connect the hydraulic female joint (11) and the hydraulic joint male head (16), release the hydraulic female joint locking ring (12), and reset under the action of the spring elastic force, so that the steel ball (20) and the positioning groove (21) are locked, so as to facilitate the insertion of the hydraulic joint male head (16) into the hydraulic female joint locking ring (12); It also includes a positioning column (10), a positioning hole (17) matching the positioning column (10) is provided at the front end of the lower shell (14), and the rear end of the positioning column (10) is fixedly mounted on the slider (9), and the positioning column (10) moves along with the slider (9); The upper connecting frame comprises a connecting pin (7), the rear end of the connecting pin (7) is fixedly mounted on the slider (9), the front end of the upper shell (1) is provided with pin through holes matching the connecting pin (7), the connecting pin (7) passes through the pin through holes, and the connecting pin (7) moves with the slider (9); The upper connecting frame comprises a linear slide rail (2) and a main electric push rod (3), the linear slide rail (2) is fixedly mounted on the rear end of the upper housing (1), the rear end of the main electric push rod (3) is mounted on the linear slide rail (2), the front end of the main electric push rod (3) is connected to the slider (9), the main electric push rod (3) pushes the slider (9) to move forward and backward, and the main electric push rod (3) moves left and right in the upper housing (1) through the linear slide rail (2); The lower connecting frame comprises a first shaft (15) and a second shaft (19), the first shaft (15) being fixed at the front end of the lower housing (14), and the second shaft (19) being fixed at the rear end of the lower housing (14), and when in operation, the pin shaft (7) passes through the pin shaft through hole and is clamped below the first shaft (15).

2. A self-positioning hydraulic quick-change device based on a hydraulic joint with open and closed ends according to claim 1, It is characterized in that The plurality of nylon sliders (5) and the plurality of nylon stoppers (6) are fixedly mounted on the slider receiving groove and are used to limit the slider (9); the slider (9) moves left and right in the upper housing (1) through the plurality of nylon sliders (5).

3. According to claim 1, a self-positioning hydraulic quick-change device based on a hydraulic joint with open and closed ends, It is characterized in that The lower connecting frame comprises a connecting block (18), the connecting block (18) being fixed on the first shaft (15), a male through hole for matching the hydraulic joint male head (16) being provided in the front-back direction on the connecting block (18), and the middle end of the hydraulic joint male head (16) being fixed on the male through hole.

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