CN219176693U

CN219176693U - Device capable of limiting stroke of oil cylinder

Info

Publication number: CN219176693U
Application number: CN202223378175.5U
Authority: CN
Inventors: 范平平; 蒙小行; 淳景奎; 高磊; 刘虹
Original assignee: Lovol Heavy Industry Group Co ltd
Current assignee: Lovol Heavy Industry Group Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-06-13
Anticipated expiration: 2032-12-16

Abstract

The utility model discloses a device capable of limiting the stroke of an oil cylinder, which comprises a bucket rod and an oil cylinder arranged on the bucket rod, wherein an accessory connecting seat is arranged at the front end of the bucket rod, a grabbing mechanism matched with the oil cylinder is arranged at the front end of the accessory connecting seat, a rocker hinged on the accessory connecting seat and a connecting rod hinged on the grabbing mechanism are arranged at the front end of the oil cylinder, the rocker is hinged at the rear end part of the connecting rod, a sensor matched with the rocker is arranged on a body of the connecting rod close to the hinged end of the oil cylinder, and the sensor is connected with an oil cylinder hydraulic control system. The hydraulic control system for the hydraulic control of the hydraulic control system of the hydraulic cylinder is compact and flexible in structure and convenient to refit, the sensor is matched with the rocker hinged to the connecting rod, and the safety limit position of the stroke shrinkage of the hydraulic control system of the hydraulic cylinder can be detected, so that the small cavity of the hydraulic control system of the hydraulic cylinder is controlled to be in a pressure maintaining state, the purpose of protecting the accessory and the bucket rod is achieved, in addition, the position of the sensor is controlled, the relative movement position of the connecting rod and the rocker can be limited, and then the opening angle of the accessory is controlled to be used for the attitude control of the accessory.

Description

Device capable of limiting stroke of oil cylinder

Technical Field

The utility model relates to the technical field of loader accessory manufacturing and processing, in particular to a device capable of limiting the stroke of an oil cylinder.

Background

The bucket cylinder of the standard machine is designed for matching with the bucket, the stroke is strictly calculated, but the accessory is designed by a special manufacturer, and the stroke of the bucket cylinder is not necessarily matched with the allowable stroke of the accessory for the same type of excavator of each excavator manufacturer in the existing market. Once the stroke of the bucket cylinder of the cone marking machine exceeds the allowable stroke of the accessory, the bucket cylinder can be caused to continuously pull the accessory, so that the accessory is damaged or the bucket rod is broken, and huge economic loss can be caused for customers.

Disclosure of Invention

The utility model aims to provide a device which is stable in structure and convenient to limit the stroke of an oil cylinder.

The utility model discloses a device capable of limiting the stroke of an oil cylinder, which comprises a bucket rod and an oil cylinder arranged on the bucket rod, and is structurally characterized in that an accessory connecting seat is arranged at the front end of the bucket rod, a grabbing mechanism matched with the oil cylinder is arranged at the front end of the accessory connecting seat, a rocker hinged to the accessory connecting seat and a connecting rod hinged to the grabbing mechanism are arranged at the front end of the oil cylinder, the rocker is hinged to the rear end of the connecting rod, a sensor matched with the rocker is arranged on a body, close to the hinged end of the oil cylinder, of the connecting rod, and the sensor is connected with an oil cylinder hydraulic control system.

After the structure is adopted, the sensor is matched with the rocker hinged on the connecting rod, and the safety limit position of the stroke shrinkage of the oil cylinder can be detected, so that the small cavity of the oil cylinder is controlled to be in a pressure maintaining state through the hydraulic control system of the oil cylinder, and the aims of protecting the accessory and the bucket rod are fulfilled.

Preferably, the connecting rod comprises a rod body, a tubular connecting part connected to the front end of the rod body and a sectional connecting part connected to the rear end of the rod body, and the sensor is arranged on the outer side wall of the rod body and is close to one end of the sectional connecting part.

Preferably, the sensor is connected with an oil cylinder hydraulic control system, the oil cylinder hydraulic control system comprises an ECU controller and a normally open relay, the normally open relay comprises a relay coil power-on loop and a relay normally open contact power-on loop, the sensor is arranged on an input end line of the ECU controller, an output end line of the ECU controller is connected with the relay coil power-on loop, an output end line of the relay normally open contact power-on loop is connected with an electromagnetic holding valve, and a valve block of the electromagnetic holding valve is connected on a hydraulic pipeline of the control oil cylinder.

Preferably, the left side wall and the right side wall of the front end of the bucket rod are provided with a first pin shaft and a second pin shaft at intervals, the position, close to the rear end, of the upper end face of the bucket rod is provided with an oil cylinder mounting seat, the attachment connecting seat comprises two mounting plates arranged at intervals, mounting holes corresponding to the first pin shaft and the second pin shaft are formed in the two mounting plates, the two mounting plates are respectively mounted on the left side wall and the right side wall of the front end of the bucket rod, and an upper hinge shaft and a lower hinge shaft of a hinge grabbing mechanism are arranged between the front ends of the two mounting plates.

Preferably, the grabbing mechanism comprises a driving claw and a driven claw which are respectively hinged to the upper hinge shaft and the lower hinge shaft, one ends of the driving claw and the driven claw, which are close to the accessory connecting seat, are hinged to each other, a hinge seat hinged to the connecting rod is arranged at the position, close to the upper end edge of the accessory connecting seat, of the upper part of the driving claw, the hinge seat comprises a baffle plate and a third pin shaft, the baffle plate is arranged on the driving claw at intervals along the left and right directions, the third pin shaft is arranged on the two baffle plates, and the interval between the two baffle plates is matched with the interval between the two mounting plates.

In summary, the beneficial effects of the utility model are as follows: the hydraulic control system for the hydraulic control of the hydraulic control system of the hydraulic cylinder is compact and flexible in structure and convenient to refit, the sensor is matched with the rocker hinged to the connecting rod, and the safety limit position of the stroke shrinkage of the hydraulic control system of the hydraulic cylinder can be detected, so that the small cavity of the hydraulic control system of the hydraulic cylinder is controlled to be in a pressure maintaining state, the purpose of protecting the accessory and the bucket rod is achieved, in addition, the position of the sensor is controlled, the relative movement position of the connecting rod and the rocker can be limited, and then the opening angle of the accessory is controlled to be used for the attitude control of the accessory.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is an electrical schematic diagram of the hydraulic control system of the cylinder of the present utility model;

FIG. 3 is a schematic view of a connecting rod according to the present utility model;

FIG. 4 is a schematic view of the structure of the attachment base of the present utility model;

FIG. 5 is a schematic diagram showing the structure of the present utility model with the attachment pulled to a limited state.

In the figure: 1. a bucket rod; 2. an oil cylinder; 3. an accessory connecting seat; 4. a grabbing mechanism; 5. a rocker; 6. a connecting rod; 7. a sensor; 8. a stem body; 9. a tubular connection portion; 10. a segmented connection; 11. an ECU controller; 12. a normally open relay; 13. a relay coil energizing circuit; 14. a normally open contact power-on loop of the relay; 15. an electromagnetic holding valve; 16. a hydraulic line; 17. a first pin; 18. a second pin; 19. a mounting plate; 20. a mounting hole; 21. an upper hinge shaft; 22. a lower hinge shaft; 23. a driving claw; 24. a driven claw; 25. a hinge base; 26. and a third pin shaft.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The following is a description of preferred embodiments of the utility model, taken in conjunction with the accompanying drawings.

As shown in fig. 1 and 4, the utility model comprises a bucket rod 1 and an oil cylinder 2 mounted on the bucket rod 1, wherein an accessory connecting seat 3 is mounted at the front end of the bucket rod 1, a grabbing mechanism 4 matched with the oil cylinder 2 is arranged at the front end of the accessory connecting seat 3, when the utility model is designed, a first pin shaft 17 and a second pin shaft 18 are arranged on the left side wall and the right side wall of the front end of the bucket rod 1 at intervals, the second pin shaft 18 is positioned on the side wall of the bucket rod 1 at the rear side of the first pin shaft 17, an oil cylinder mounting seat for mounting the oil cylinder 2 is arranged at the position, close to the rear end, of the upper end surface of the bucket rod 1, the accessory connecting seat 3 comprises two mounting plates 19 which are arranged at intervals, mounting holes 20 corresponding to the first pin shaft 17 and the second pin shaft 18 are arranged on the two mounting plates 19, the two mounting plates 19 are respectively mounted on the left side wall and the right side wall of the front end of the bucket rod 1, and an upper hinge shaft 21 and a lower hinge shaft 22 of the grabbing mechanism 4 are arranged between the front ends of the two mounting plates 19; in the manufacturing process, the mounting hole 20 matched with the first pin shaft 17 is a round hole, the mounting hole 20 matched with the second pin shaft 18 is a oblong hole, the second pin shaft 18 is provided with a baffle for fixedly mounting the two mounting plates 19, the first pin shaft 17 is hinged with the rocker 5 in order to be matched with the rocker, and the upper hinge shaft 21 and the lower hinge shaft 22 mounted at the front ends of the two mounting plates 19 are mounted along the horizontal direction. Of course, the structure of the arm 1 and the cylinder 2 is a known structure, and will not be described here.

As shown in fig. 4, in a preferred embodiment of the present utility model, the gripping mechanism 4 includes a driving claw 23 and a driven claw 24 hinged to the upper hinge shaft 21 and the lower hinge shaft 22, respectively, one end of the driving claw and the driven claw 24 near the attachment base 3 are hinged to each other, the driving claw 23 and the driven claw 24 are standard components and are of a known structure, a hinge base 25 hinged to the connecting rod 6 is provided at the upper part of the driving claw and near the upper end edge of the attachment base 3, and when the gripping mechanism is designed, the hinge base 25 includes a baffle plate arranged on the driving claw 23 at intervals along the left-right direction and a third pin 26 connected to the two baffle plates, and when the gripping mechanism is manufactured, the interval between the two baffle plates is matched with the interval between the two mounting plates 19.

As shown in fig. 1 and 3, in another preferred embodiment of the present utility model, a rocker 5 hinged to an attachment connection base 3 and a link 6 hinged to a gripping mechanism 4 are provided at the front end of the cylinder 2, the link 6 includes a rod body 8, a tubular connection 9 connected to the front end of the rod body 8, and a segmented connection 10 connected to the rear end of the rod body 8, and when the hydraulic cylinder is manufactured, the segmented connection 10 includes two cylindrical connection bases provided at intervals on the rod body 8, the ends of the two cylindrical connection bases are provided opposite to each other and spaced apart along the width direction of the rod body 8, the outer ends of the two cylindrical connection bases extend out of the side edge of the rod body 8, and each of the outer ends of the cylindrical connection bases is hinged with the rocker 5, such that one end of the rocker 5 is hinged to the link 6, the other end is hinged to a first pin 17 connected to the outer end of the attachment connection base 3, and the front end of the cylinder 2 is hinged between the two cylindrical connection bases.

As shown in fig. 1 and 3, in a specific embodiment of the present utility model, a sensor 7 matched with a rocker 5 is disposed on a body of a connecting rod 6 near a hinged end of an oil cylinder 2, and in design, a mounting groove is disposed on an outer side wall of a rod portion body 8 of the connecting rod 6, the outer side wall is one side hinged with the rocker 5, a sensor 7 is disposed in the mounting groove, an outer end face of the sensor 7 is flush with an outer side wall of the rod portion body 8, and in manufacturing, the mounting groove and the sensor 7 are disposed on the outer side wall of the rod portion body 8 and near one end of a segmented connecting portion 10, and the setting of the position can be determined according to a relative position of the rocker 5 and the connecting rod 6 when an ultimate opening angle of the accessory is formed, so that by controlling the position of the sensor 7, a relative movement position of the connecting rod 6 and the rocker 5 can be limited, and then the opening angle of the accessory can be controlled for controlling the attitude determination. Of course, the above-mentioned sensor is of a known structure, and is generally cylindrical in shape of JM-18N18C/JM-18P8C used in the process of installation, and will not be described herein.

In a preferred embodiment of the present utility model, as shown in fig. 1, 2 and 5, the sensor 7 is connected to a hydraulic control system of an oil cylinder, the oil cylinder 2 is controlled to shrink by the hydraulic control system of the oil cylinder, so as to achieve the purpose of protecting the accessories, when the hydraulic control system of the oil cylinder is designed, the hydraulic control system of the oil cylinder comprises an ECU controller 11 and a normally open relay 12, the normally open relay 12 comprises a relay coil power-on loop 13 and a relay normally open contact power-on loop 14, the sensor 7 is connected to an input end line of the ECU controller 11, the sensor 7 is a sensor 7 mounted on a side wall of a connecting rod 6 and is connected with a power supply, an output end line of the ECU controller 11 is connected with the relay coil power-on loop 13, meanwhile, a valve block of the electromagnetic holding valve 15 is connected to a hydraulic line 16 of the control oil cylinder 2, and the hydraulic line 16 is connected to a small cavity of the oil cylinder 2. When the sensor 7 on the connecting rod 6 is not shielded by the rocker 5, the sensor 7 does not detect an object, at the moment, the sensor 7 does not transmit an electric signal to the ECU controller 11, the ECU controller 11 does not transmit high-level current to enter the relay coil power-on loop 13, the relay normally-open contact power-on loop 14 is in a disconnection state, so that the electromagnetic holding valve 15 does not work, and the oil pressure oil way controls the oil cylinder 2 to stretch out and draw back; when the oil cylinder 2 is contracted, the connecting rod 6 rotates until the rocker 5 is shielded at the sensor 7, the sensor 7 detects an object, at the moment, the sensor 7 transmits an electric signal to the ECU controller 11, the ECU controller 11 also transmits a high-level current to enter the relay coil energizing circuit 13, at the moment, the normally open contact energizing circuit 14 of the relay is in a closed state, the electromagnetic holding valve 15 works, the small cavity of the oil cylinder 2 is controlled to enter a pressure maintaining state, and the oil cylinder 2 cannot be contracted and is in an extending state.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. The utility model provides a device of limited cylinder stroke, includes dipper (1) and installs hydro-cylinder (2) on dipper (1), its characterized in that: the front end of the bucket rod (1) is provided with an accessory connecting seat (3), the front end of the accessory connecting seat (3) is provided with a grabbing mechanism (4) matched with the oil cylinder (2), the front end of the oil cylinder (2) is provided with a rocker (5) hinged on the accessory connecting seat (3) and a connecting rod (6) hinged on the grabbing mechanism (4), the rocker (5) is hinged to the rear end of the connecting rod (6), a sensor (7) matched with the rocker (5) is arranged on a body, close to the hinged end of the oil cylinder (2), of the connecting rod (6), and the sensor (7) is connected with an oil cylinder hydraulic control system.

2. The cylinder stroke limiter apparatus of claim 1, wherein: the connecting rod (6) comprises a rod body (8), a tubular connecting part (9) connected to the front end of the rod body (8) and a sectional connecting part (10) connected to the rear end of the rod body (8), and the sensor (7) is arranged on the outer side wall of the rod body (8) and is close to one end of the sectional connecting part (10).

3. The cylinder stroke limiter apparatus of claim 1, wherein: the sensor (7) is connected with the hydraulic control system of the oil cylinder, the hydraulic control system of the oil cylinder comprises an ECU (electronic control unit) controller (11) and a normally open relay (12), the normally open relay (12) comprises a relay coil power-on loop (13) and a relay normally open contact power-on loop (14), the sensor (7) is arranged on an input end line of the ECU controller (11), an output end line of the ECU controller (11) is connected with the relay coil power-on loop (13), an output end line of the relay normally open contact power-on loop (14) is connected with an electromagnetic holding valve (15), and a valve block of the electromagnetic holding valve (15) is connected on a hydraulic pipeline (16) of the control oil cylinder (2).

4. The cylinder stroke limiter apparatus of claim 1, wherein: the left side wall and the right side wall of the front end of the bucket rod (1) are provided with a first pin shaft (17) and a second pin shaft (18) at intervals, the position, close to the rear end, of the upper end face of the bucket rod (1) is provided with an oil cylinder mounting seat, the attachment connecting seat (3) comprises two mounting plates (19) arranged at intervals, mounting holes (20) corresponding to the first pin shaft (17) and the second pin shaft (18) are formed in the two mounting plates (19), the two mounting plates (19) are respectively mounted on the left side wall and the right side wall of the front end of the bucket rod (1), and an upper hinge shaft (21) and a lower hinge shaft (22) of a hinge grabbing mechanism (4) are arranged between the front ends of the two mounting plates (19).

5. The cylinder stroke limiter apparatus of claim 4, wherein: the grabbing mechanism (4) comprises a driving claw (23) and a driven claw (24) which are hinged to an upper hinge shaft (21) and a lower hinge shaft (22) respectively, one ends of the driving claw and the driven claw (24) close to the accessory connecting seat (3) are hinged to each other, the upper part of the driving claw is provided with a hinge seat (25) hinged to a connecting rod (6) close to the upper end edge of the accessory connecting seat (3), the hinge seat (25) comprises baffle plates arranged on the driving claw (23) along the left-right direction at intervals and a third pin shaft (26) arranged on the two baffle plates, and the interval between the two baffle plates is matched with the interval between the two mounting plates (19).