Welding hopper angle detection device and excavator thereof

Abstract

The utility model relates to the technical field of excavator part equipment, in particular to a welding hopper angle detection device and an excavator thereof. The bottom of the welding bucket oil cylinder is hinged to the extending arm through a rotating pin and a rotating lug, and the output end of the welding bucket oil cylinder is connected with a welding bucket connecting arm and a welding bucket; and the gear assembly is installed on the outer side of the rotating lug and on the side away from the oil cylinder, the gear assembly is connected with an angle sensor through a rotation transmission assembly, and the angle sensor is electrically connected with the controller. The utility model aims to solve the problem that the rotation angle of the welding hopper is difficult to accurately measure in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of excavator parts and equipment technology, specifically to a welding bucket angle detection device and an excavator thereof. Background Art

[0002] An excavator is a heavy construction equipment mainly used for excavating materials such as soil, coal, and ore. It can also be used for excavation, backfilling, and site leveling in civil engineering projects.

[0003] Excavators mainly consist of a power system, a robotic arm, a welding bucket (also known as a shovel bucket), a chassis, and a control system. Currently, the operation of excavators relies solely on the driver's perspective from inside the cab to observe the posture of the boom and stick to determine the digging status of the welding bucket. This is especially problematic when digging materials deep below the ground level, or when the excavator has a long reach and boom, or when digging deep water pits with the welding bucket. In these situations, the driver's field of vision is limited, making it difficult to accurately obtain the posture of the welding bucket.

[0004] In existing technologies, angle sensors are installed between the welding bucket and its connecting arm, or between the welding bucket cylinder and the welding bucket rotating pin, to detect the welding bucket's posture. These sensors determine the welding bucket's rotation angle and then calculate its posture. However, current angle sensors are mainly electronic components, and direct installation on the welding bucket can easily lead to damage during continuous operation, especially when excavating deep foundation pits where water is often present. Ordinary angle sensors cannot operate continuously for extended periods in such harsh conditions, resulting in poor accuracy in welding bucket angle detection. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a welding bucket angle detection device and its excavator to solve the problem of difficulty in accurately measuring the rotation angle of the welding bucket in the prior art.

[0006] This utility model is achieved through the following technical solution:

[0007] A welding bucket angle detection device, comprising

[0008] Extend your arm;

[0009] A welding bucket cylinder, the bottom of which is hinged to the extension arm via a rotating pin and a rotating lug, and the output end of which is connected to the welding bucket connecting arm and the welding bucket;

[0010] A gear assembly is mounted on the outside of the rotating lug and away from the hydraulic cylinder. The gear assembly is connected to an angle sensor via a rotation transmission component, and the angle sensor is electrically connected to the controller.

[0011] Furthermore, the gear assembly includes a half-gear ring, which is mounted on the outer edge of the rotating lug and is meshed with the rotation transmission assembly.

[0012] Furthermore, the rotation transmission assembly includes a meshing gear that meshes with the half-gear ring. The meshing gear is connected to a synchronous large gear via a rotating shaft. The synchronous large gear meshes with an intermediate gear. The intermediate gear is connected to the angle sensor via a connecting rod.

[0013] Furthermore, the rotating shaft and the connecting rod are respectively connected to the extension arm via a rotating shaft support.

[0014] Furthermore, an angle calibration device is also installed on the extension arm.

[0015] Furthermore, the angle calibration device includes a pressure cylinder and a piston. The pressure cylinder has a pressure chamber, and the piston is installed inside the pressure chamber. The piston is connected to a support rod, which extends out of the pressure cylinder and has a ball head connected to its end. The ball head abuts against the lower side of the middle of the welding hopper cylinder. The pressure chamber is filled with hydraulic oil, and the pressure chamber is also connected to a detection component.

[0016] Furthermore, the detection component includes a bellows assembly and a connecting pipe. The two ends of the connecting pipe are connected to the bellows assembly and the pressure chamber. The bellows assembly is also connected to a pressure sensor through a transmission pipe. The bellows assembly, the connecting pipe, and the transmission pipe are all filled with hydraulic oil.

[0017] The pressure sensor is also electrically connected to the controller.

[0018] An excavator includes a welding bucket angle detection device as described above, and also includes a boom, a boom support cylinder, and an excavator body.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. One end of the welding bucket cylinder of the excavator is hinged to the boom via a rotating pin and a rotating lug, and the other end is hinged to the welding bucket. During the rotation of the welding bucket, the extension and retraction of the welding bucket cylinder causes the end of the welding bucket cylinder and the end of the welding bucket to move in an arc around the welding bucket connecting arm. When the welding bucket cylinder retracts, the hinge point between the welding bucket cylinder and the boom connecting rod is close to the boom. When the welding bucket cylinder extends and retracts to its maximum position, the distance between the hinge point between the welding bucket cylinder and the boom connecting rod and the boom is larger. Therefore, during the extension and retraction of the welding bucket cylinder, the end of the welding bucket cylinder will rotate evenly around the rotating pin. When the welding cylinder rotates around the rotating pin, it will drive the gear assembly to rotate, and in turn drive the transmission assembly and the angle sensor to rotate. The angle sensor accurately detects the rotation angle of the welding cylinder and calculates the extension distance of the welding bucket cylinder. The extension and retraction distance of the welding bucket cylinder is used to further calculate the rotation angle of the welding bucket. The angle sensor is installed on the boom to avoid damage to the angle sensor when the excavator digs deep pits and to accurately measure the rotation angle of the welding bucket.

[0021] 2. The extension and retraction of the welding bucket cylinder causes the end of the welding bucket cylinder and one end of the welding bucket to move in an arc around the welding bucket connecting arm. When the welding bucket cylinder retracts, the hinge point between the welding bucket cylinder and the extension arm connecting rod is close to the extension arm. When the welding bucket cylinder extends and retracts to its maximum position, the distance between the hinge point between the welding bucket cylinder and the extension arm connecting rod and the extension arm is larger. During the extension and retraction process, the welding bucket cylinder pushes the piston to compress the hydraulic oil in the pressure chamber. The hydraulic oil transmits the pressure to the bellows assembly and the pressure sensor. The pressure sensor calculates the pressure of the hydraulic oil in the pressure chamber, and the piston's movement distance is calculated based on the hydraulic oil pressure. Then, the downward movement distance of the welding bucket cylinder is calculated. Based on the downward movement distance of the welding bucket cylinder, the extension and retraction length and the extension distance of the welding bucket cylinder are calculated. Finally, the rotation angle of the welding bucket is calculated. The measurement accuracy of the welding bucket rotation angle is further improved by comparing the angle measured by the angle calibration device and the angle sensor.

[0022] 3. The bellows assembly ensures that the hydraulic oil in the pressure chamber always has a certain pressure and serves as a storage container for excess hydraulic oil. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the welding bucket angle detection device according to a specific embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the gear assembly, transmission assembly, and angle sensor structure according to a specific embodiment of the present invention. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the gear assembly, transmission assembly, and angle sensor structure according to a specific embodiment of the present invention. Figure 2 ;

[0026] Figure 4 This is a schematic diagram of the angle calibration device according to a specific embodiment of the present invention.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Extending arm; 2. Welding bucket cylinder; 3. Rotating pin; 4. Rotating lug; 5. Welding bucket connecting arm; 6. Welding bucket; 7. Gear assembly; 8. Rotation transmission assembly; 9. Angle sensor; 10. Controller; 11. Half gear ring; 12. Meshing gear; 13. Rotating shaft; 14. Synchronous large gear; 15. Intermediate gear; 16. Connecting rod; 17. Rotating shaft support seat; 18. Angle calibration device; 19. Pressure cylinder; 20. Piston; 21. Pressure chamber; 22. Support rod; 23. Ball head; 24. Connecting pipe; 25. Bellows assembly; 26. Transmission pipe; 27. Pressure sensor. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0032] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0034] Please see Figure 1-4 The present invention provides a technical solution: a welding bucket angle detection device, including an extension arm 1 for supporting and moving a welding bucket cylinder 2, and the other end of the extension arm 1 is hinged to the welding bucket cylinder 2.

[0035] The bottom of the welding bucket cylinder 2 is hinged to the extension arm 1 via a rotating pin 3 and a rotating lug 4. The output end of the welding bucket cylinder 2 is connected to the welding bucket connecting arm 5 and the welding bucket 6. The other end of the welding bucket connecting arm 5 is hinged to the extension arm 1, so that the welding bucket 6 can flexibly carry out digging and loading operations.

[0036] Gear assembly 7 is mounted on the outside of rotating ear 4 and away from the oil cylinder. Gear assembly 7 is connected to angle sensor 9 through rotation transmission assembly 8. Angle sensor 9 is electrically connected to controller 10. Controller 10 can use an integrated circuit board of model LM393B. The integrated circuit board also has a comparator and calculator.

[0037] In this embodiment, one end of the welding bucket cylinder 2 of the excavator is hinged to the extension arm 1 via a rotating pin 3 and a rotating lug 4, and the other end of the welding bucket cylinder 2 is hinged to the welding bucket 6. During the rotation of the welding bucket 6 by the welding bucket cylinder 2, the extension and retraction of the welding bucket cylinder 2 causes the end of the welding bucket cylinder 2 and one end of the welding bucket 6 to move in an arc around the welding bucket connecting arm 5. When the welding bucket cylinder 2 retracts, the hinge point between the welding bucket cylinder 2 and the welding bucket connecting arm 5 is close to the extension arm 1. However, when the welding bucket cylinder 2 extends to its maximum position, the distance between the hinge point between the welding bucket cylinder 2 and the welding bucket connecting arm 5 and the extension arm 1 is larger. Therefore, during the extension and retraction of the welding bucket cylinder 2, the end of the welding bucket cylinder 2 will rotate evenly around the rotating pin 3. When pin 3 rotates evenly, it drives gear assembly 7 to rotate, which in turn drives rotation transmission assembly 8 and angle sensor 9 to rotate. The angle sensor 9 accurately detects the rotation angle of welding bucket cylinder 2 and calculates the extension distance of welding bucket cylinder 2. The extension distance of welding bucket cylinder 2 is used to further calculate the rotation angle of welding bucket 6. At the same time, the angle sensor 9 is installed on the extension arm 1 to avoid damage to the angle sensor 9 when the excavator digs the foundation pit deeply, and to accurately measure the rotation angle of welding bucket 6. In other embodiments, the angle sensor 9 is a BMA180 angle sensor or an absolute angle encoder with model CWD8037C-331K.

[0038] like Figure 2 , Figure 3As shown, in another embodiment, the gear assembly 7 includes a half gear ring 11. In order to improve the measurement accuracy of the rotation angle of the welding bucket 6, the teeth on the half gear ring 11 are helical gears. The half gear ring 11 is installed on the outer edge of the rotating ear 4. The half gear ring 11 is meshed with the rotation transmission assembly 8. During the rotation of the welding bucket cylinder 2 around the rotating pin 3, the half gear ring 11 rotates synchronously around the rotating pin 3, thereby driving the rotation transmission assembly 8 to rotate.

[0039] like Figure 1 , Figure 2 As shown, in some embodiments, the rotation transmission assembly 8 is used not only to transmit the rotation angle of the welding bucket cylinder 2 to the angle sensor 9, but also to amplify the rotation angle to avoid a relatively large measurement error caused by a small rotation angle of the welding bucket cylinder 2. Specifically, the rotation transmission assembly 8 includes a meshing gear 12, which meshes with a half gear ring 11. The meshing gear 12 is connected to a synchronous large gear 14 through a rotating shaft 13. The synchronous large gear 14 meshes with an intermediate gear 15. The intermediate gear 15 is connected to the angle sensor 9 through a connecting rod 16. The rotating shaft 13 and the connecting rod 16 are respectively connected to the extension arm 1 through a rotating shaft support 17.

[0040] In this embodiment, the meshing gear 12, the synchronizing gear 14, and the intermediate gear 15 are all helical gears. The number of rotations of the meshing gear 12 is amplified by the tooth ratio between the synchronizing gear 14 and the intermediate gear 15, which is beneficial for further detection and calculation by the angle sensor 9.

[0041] like Figure 1 , Figure 4 As shown in the embodiment, an angle calibration device 18 is also installed on the extension arm 1. The angle calibration device 18 includes a pressure cylinder 19 and a piston 20. The pressure cylinder 19 can be a hydraulic cylinder. The pressure cylinder 19 has a pressure chamber 21. The piston 20 is installed in the pressure chamber 21. The piston 20 is connected to a support rod 22. The support rod 22 extends out of the pressure cylinder 19 and the end of the support rod 22 is connected to a ball head 23. The ball head 23 abuts against the lower side of the middle of the welding bucket hydraulic cylinder 2. The pressure chamber 21 is filled with hydraulic oil. In other embodiments, it can also be filled with silicone oil. The pressure chamber 21 is also connected to a detection component.

[0042] In this embodiment, the angle calibration device 18 is not only used to detect and calculate the rotation angle of the welding bucket 6 and compare it with the rotation angle of the welding bucket 6 calculated by the angle sensor 9, but also used to calibrate the angle sensor 9 to avoid the drift of the base point of the angle sensor 9 after long-term use.

[0043] The detection assembly includes a bellows assembly 25 and a connecting pipe 24. The corrugated structure inside the bellows assembly 25 has a certain buffering and absorption capacity, which is beneficial for the piston 20 to squeeze the hydraulic oil in the pressure chamber 21 into the bellows assembly 25 for temporary storage. The two ends of the connecting pipe 24 are connected to the bellows assembly 25 and the pressure chamber 21. The bellows assembly 25 is also connected to the pressure sensor 27 through the transmission pipe 26. The bellows assembly 25, the connecting pipe 24 and the transmission pipe 26 are all filled with hydraulic oil. The pressure sensor 27 is also electrically connected to the controller 10. The pressure sensor 27 can be a sensor of the OMRON E8PC series.

[0044] In this example, piston 20 squeezes the hydraulic oil in pressure chamber 21 into bellows assembly 25, causing the pressure inside bellows assembly 25 to increase. Pressure sensor 27 detects the pressure inside bellows assembly 25, calculates the moving distance of piston 20 based on the hydraulic oil pressure, then calculates the downward movement distance of welding bucket cylinder 2, then calculates the extension length and extension distance of welding bucket cylinder 2 based on the downward movement distance of welding bucket cylinder 2, and finally calculates the rotation angle of welding bucket 6.

[0045] This utility model also provides an excavator, including the above-mentioned welding bucket angle detection device, as well as a boom, a boom support cylinder and an excavator body.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A welding bucket angle detection device, characterized in that: include Extend your arm (1); The bottom of the welding bucket cylinder (2) is hinged to the extension arm (1) by a rotating pin (3) and a rotating ear (4), and the output end of the welding bucket cylinder (2) is connected to the welding bucket connecting arm (5) and the welding bucket (6). Gear assembly (7) is mounted on the outside of the rotating ear (4) and away from the oil cylinder. The gear assembly (7) is connected to an angle sensor (9) via a rotation transmission assembly (8). The angle sensor (9) is electrically connected to the controller (10).

2. The welding bucket angle detection device according to claim 1, characterized in that: The gear assembly (7) includes a half gear ring (11), which is mounted on the outer edge of the rotating lug (4) and is meshed with the rotation transmission assembly (8).

3. The welding bucket angle detection device according to claim 2, characterized in that: The rotation transmission assembly (8) includes a meshing gear (12), which meshes with the half gear ring (11). The meshing gear (12) is connected to a synchronous large gear (14) via a rotating shaft (13). The synchronous large gear (14) meshes with an intermediate gear (15). The intermediate gear (15) is connected to the angle sensor (9) via a connecting rod (16).

4. The welding bucket angle detection device according to claim 3, characterized in that: The rotating shaft (13) and the connecting rod (16) are respectively connected to the extension arm (1) through the rotating shaft support (17).

5. The welding bucket angle detection device according to claim 1, characterized in that: An angle calibration device (18) is also installed on the extension arm (1).

6. The welding bucket angle detection device according to claim 5, characterized in that: The angle calibration device (18) includes a pressure cylinder (19) and a piston (20). The pressure cylinder (19) has a pressure chamber (21). The piston (20) is installed in the pressure chamber (21). The piston (20) is connected to a support rod (22). The support rod (22) extends out of the pressure cylinder (19) and the end of the support rod (22) is connected to a ball head (23). The ball head (23) abuts against the lower side of the middle part of the welding bucket cylinder (2). The pressure chamber (21) is filled with hydraulic oil. The pressure chamber (21) is also connected to a detection component.

7. The welding bucket angle detection device according to claim 6, characterized in that: The detection component includes a bellows assembly (25) and a connecting pipe (24). The two ends of the connecting pipe (24) are connected to the bellows assembly (25) and the pressure chamber (21). The bellows assembly (25) is also connected to the pressure sensor (27) through a transmission pipe (26). The bellows assembly (25), the connecting pipe (24) and the transmission pipe (26) are all filled with hydraulic oil. The pressure sensor (27) is also electrically connected to the controller (10).

8. An excavator, comprising the welding bucket angle detection device as described in any one of claims 1 to 7, characterized in that: It also includes the boom, boom support cylinder and excavator body.

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