Joint transmission device for telescopic arm of excavator

Abstract

The utility model relates to a joint transmission device for a telescopic arm of an excavator. The joint transmission device comprises a box body and a first transmission mechanism, wherein the box body is arranged at the hinged part of a movable arm and a bucket rod of the excavator; the first transmission mechanism is arranged in the box body; the first transmission mechanism comprises a first input assembly arranged on the box body and used for being connected with an input transmission rod, a first output assembly arranged on the box body and used for being connected with an output transmission rod, and a first transmission assembly in transmission connection with the first input assembly and the first output assembly. The first input assembly and the first output assembly are configured to be capable of adjusting the angle between the input transmission rod and the output transmission rod when the movable arm and the bucket rod rotate relatively so as to adapt to the angle between the movable arm and the bucket rod. Therefore, the rotating power output by the driving equipment can be effectively transmitted to the working equipment in the relative rotation process of the movable arm and the bucket rod of the excavator.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission, in particular to a joint transmission device for a telescopic arm of an excavator. Background Art

[0002] In actual engineering applications, excavators are mainly used to excavate materials above or below the bearing surface, and load them into transport vehicles or unload them to stockpiles. The boom and dipper of the excavator form a simple connecting rod mechanism. The boom and dipper are hinged to each other, and various actions in the excavation process are achieved by changing the stroke of each cylinder. The lower hinge point of the boom is hinged to the connecting ear on the turntable, and the boom is supported by the boom cylinder and rotated around its lower hinge point by changing the stroke of the boom cylinder. The dipper is hinged to the upper end of the boom, and the dipper can rotate around the hinge point at the upper end of the boom by changing the stroke of the dipper cylinder installed on the boom. Therefore, the boom and dipper of the excavator can make the end of the dipper extend to a farther working point, especially for long-arm excavators. This makes excavators often used for emergency disposal in actual engineering applications to keep engineering and technical personnel away from dangerous working points, thereby ensuring the personal safety of engineering and technical personnel.

[0003] In some emergency response processes, a cutting device needs to be installed at the end of the digger arm for cutting operations. Since it is difficult to accurately control the movement of the cutting gun head of the cutting device through the movement and rotation of the digger itself, the cutting device generally uses a nut screw mechanism to control the movement of the cutting gun head. Due to the harsh working conditions at the work site, the drive device of the nut screw mechanism is required to be installed on the boom of the digger so that the drive device is away from the work site.

[0004] However, during the relative rotation of the boom and the dipper arm of the excavator, the existing transmission device cannot transmit the power output by the driving device to the nut screw mechanism of the cutting device. Utility Model Content

[0005] Based on the above problems existing in the prior art, the utility model provides a joint transmission device for a telescopic arm of an excavator, which can transmit the rotational power output by the driving device to the working device at the end of the boom during the relative rotation of the boom and the boom of the excavator.

[0006] The utility model adopts a technical solution to solve the technical problem: a joint transmission device for a telescopic arm of an excavator is provided, comprising:

[0007] A box body is installed at the hinge of the boom and the dipper arm of the excavator; and

[0008] A first transmission mechanism is installed in the housing, the first transmission mechanism includes a first input assembly arranged on the housing for connecting to an input transmission rod, a first output assembly arranged on the housing for connecting to an output transmission rod, and a first transmission assembly transmission-connected to the first input assembly and the first output assembly,

[0009] The first input assembly and the first output assembly are configured to adjust the angle between the input transmission rod and the output transmission rod when the boom and the arm rotate relative to each other, so as to adapt to the angle between the boom and the arm.

[0010] Furthermore, the box body includes a first box part connected to the hinge of the boom and the arm, and a second box part connected to the first box part, and the second box is configured to be able to rotate relative to the first box part to form a limit in the axial direction with the first box part.

[0011] Furthermore, the first box component and the second box component are both hollow cylindrical structures which are open at one end and closed at the other end, and the edge of the open end of the first box component forms a limiting portion in the radially outward direction, and the edge of the open end of the second box component forms a limiting groove extending in the circumferential direction in the radially outward direction, and the limiting portion is accommodated in the limiting groove.

[0012] Further, the first input assembly includes an input shaft mounted on the input surface of the first box member, an input member mounted at one end of the input shaft for transmission connection with the first transmission assembly, and an input universal joint mounted at the other end of the input shaft for connection with the input transmission rod.

[0013] The input universal joint is configured to enable the rotational power of the input transmission rod to be always input into the first transmission mechanism when the boom and the arm rotate relative to each other.

[0014] Further, the first output assembly includes an output shaft mounted on the output surface of the second box member, an output member mounted at one end of the output shaft for transmission connection with the first transmission assembly, and an output universal joint mounted at the other end of the output shaft for connection with the output transmission rod.

[0015] The output universal joint is configured to enable the rotational power transmitted from the first transmission assembly to the first output assembly to be always output through the output transmission rod when the boom and the arm rotate relative to each other.

[0016] Furthermore, the first transmission assembly includes a first transmission shaft disposed in the housing, and a first transmission member and a second transmission member respectively disposed at both ends of the first transmission shaft, and the first transmission member and the second transmission member are respectively connected to the input member and the output member in a transmission manner.

[0017] Furthermore, the joint transmission device also includes a second transmission mechanism arranged in the box.

[0018] Furthermore, the second transmission mechanism includes a second transmission assembly coaxially arranged with the first transmission assembly, and a second input assembly and a second output assembly transmission-connected with the second transmission assembly.

[0019] The second input component has the same structure as the first input component, and the second output component has the same structure as the first output component.

[0020] Further, the second transmission assembly includes a second transmission shaft sleeved on the first transmission shaft, and a third transmission member and a fourth transmission member arranged at both ends of the second transmission shaft and used for transmission connection with the second input assembly and the second output assembly respectively.

[0021] The second transmission shaft is configured to be rotatable relative to the first transmission shaft.

[0022] Furthermore, the third transmission member and the fourth transmission member are hollow structures so that the first transmission shaft can pass through them.

[0023] The beneficial effect of the utility model is as follows: the joint transmission device for the telescopic arm of an excavator provided by the utility model comprises a box body installed at the hinge of the boom and the bucket arm of the excavator and a first transmission mechanism installed in the box body. The first transmission mechanism comprises a first input assembly arranged on the box body for connecting the input transmission rod, a first output assembly arranged on the box body for connecting the output transmission rod, and a first transmission assembly transmission-connected to the first input assembly and the first output assembly. The first input assembly and the first output assembly are configured to adjust the angle between the input transmission rod and the output transmission rod when the boom and the bucket arm rotate relative to each other, so as to adapt to the angle between the boom and the bucket arm. In this way, the rotational power output by the driving device can be effectively transmitted to the working equipment during the relative rotation of the boom and the bucket arm of the excavator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1The figure shows a schematic diagram of the structure of the joint transmission device for the telescopic arm of the excavator installed on the excavator.

[0026] Figure 2 Shown Figure 1 A partial enlarged view of a perspective of the articulated transmission device for the telescopic arm of an excavator installed on the excavator.

[0027] Figure 3 Shown Figure 1 A structural cross-sectional view of the articulated transmission device for the telescopic arm of an excavator.

[0028] Among them, the reference numerals in the figures are as follows: 100, joint transmission device; 10, box body; 11, first box member; 111, input surface; 112, limiting portion; 12, second box member; 121, output surface; 122, limiting groove; 20, first transmission mechanism; 21, first input assembly; 211, input shaft; 212, input universal joint; 213, input member; 22, first transmission assembly; 220, first transmission shaft; 221, first transmission member; 222, second transmission member; 23, first output assembly; 231, output shaft; 232, output universal joint; 233, output member;

[0029] 30. Second transmission mechanism; 31. Second input assembly; 32. Second transmission assembly; 320. Second transmission shaft; 321. Third transmission member; 322. Fourth transmission member; 33. Second output assembly;

[0030] 200, excavator; 201, boom; 202, arm; 203, pin;

[0031] 300, driving device; 301, input transmission rod; 302, output transmission rod. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model is now described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the composition related to the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] refer to Figure 1-3As shown, the utility model provides a joint transmission device 100 for a telescopic arm of an excavator 200, comprising a housing 10 and a first transmission mechanism 20 installed in the housing 10. The first transmission mechanism 20 is configured to always receive the rotational power output by the driving device 300 during the relative rotation of the boom 201 and the dipper 202 of the excavator 200 through the pin 203, and then output the rotational power to the working equipment (not shown in the figure) installed at the end of the dipper 202 after changing the direction. The angle between the direction of the rotational power input into the first transmission mechanism 20 and the direction output by the first transmission mechanism 20 can always adapt to the angle between the boom 201 and the dipper 202, so that the joint transmission device 100 can effectively transmit the power output by the driving device 300 to the working equipment during the relative rotation of the boom 201 and the dipper 202 of the excavator 200.

[0034] In some embodiments, the driving device 300 may be a motor to output rotational power to the first transmission mechanism 20. The working device is a cutting device, and the rotational power is used to drive a nut screw mechanism of the cutting device.

[0035] refer to Figure 1 and Figure 3 As shown, in some embodiments, the box body 10 includes a first box member 11 installed at the hinge of the boom 201 and the stick 202, and a second box member 12 connected to the first box member 11. The first box member 11 and the second box member 12 respectively have an input surface 111 facing the drive device 300 and an output surface 121 facing the working device.

[0036] Combination Figure 2 and Figure 3 As shown, in some embodiments, the first box member 11 and the second box member 12 are both hollow cylindrical structures with one end open and the other end closed. The open ends of the first box member 11 and the second box member 12 are mutually buckled and connected in the axial direction, so that the first box member 11 and the second box member 12 can rotate relative to each other in the circumferential direction, but cannot be separated in the axial direction.

[0037] In this embodiment, the edge of the opening end of the first box member 11 forms a limiting portion 112 in the radially outward direction, and the edge of the opening end of the second box member 12 forms a limiting groove 122 extending in the circumferential direction in the radially outward direction. The limiting portion 112 is received in the limiting groove 122, so that the first box member 11 and the second box member 12 are limited in the axial direction, but can rotate relative to each other in the circumferential direction.

[0038] refer to Figure 3As shown, in some embodiments, the first transmission mechanism 20 includes a first transmission assembly 22 rotatably connected to the inner wall of the box body 10, and a first input assembly 21 and a first output assembly 23 respectively arranged at both ends of the first transmission assembly 22. The first input assembly 21 is configured to always receive the rotational power output by the driving device 300 during the relative rotation of the boom 201 and the arm 202 of the excavator 200. The first input assembly 21 transmits the rotational power to the first output assembly 23 through the first transmission assembly 22. The first output assembly 23 is configured to always output the rotational power transmitted by the first transmission assembly 22 to the working equipment during the relative rotation of the boom 201 and the arm 202.

[0039] In some embodiments, the first input assembly 21 includes an input shaft 211 mounted on the input surface 111 of the first box member 11, an input universal joint 212 mounted on one end of the input shaft 211 located outside the box body 10, and an input member 213 mounted on one end of the input shaft 211 located inside the box body 10. The input shaft 211 penetrates the input surface 111 of the first box member 11 in the radial direction and is rotationally connected to the input surface 111. The input universal joint 212 can be connected to the output end of the driving device 300 through the input transmission rod 301, so that the rotational power output by the driving device 300 is always transmitted to the first input assembly 21 in a direction parallel to the axis of the boom 201 during the relative rotation of the boom 201 and the arm 202.

[0040] In some of the embodiments, the first transmission assembly 22 includes a first transmission shaft 220 rotatably connected in the housing 10, and a first transmission member 221 and a second transmission member 222 respectively mounted at both ends of the first transmission shaft 220. The first transmission member 221 is transmission-connected to the input member 213, so that the rotational power output by the driving device 300 can be transmitted to the first transmission member 221 through the input universal joint 212 and the input member 213. In some of the preferred embodiments, the first transmission shaft 220 is rotationally connected to the housing 10 through a sleeve (not shown in the figure) mounted on the inner wall of the first housing 11 and the second housing 12.

[0041] In this embodiment, the input member 213 and the first transmission member 221 are two mutually meshing 45° bevel gears, so that the first input component 21 and the first transmission component 22 can achieve the transmission of rotational power at an angle of 90°. In some other embodiments not shown, the input member 213 and the first transmission member 221 can also be mutually meshing worms and worm wheels, respectively. In this way, the transmission of rotational power at an angle of 90° can also be achieved between the first input component 21 and the first transmission component 22. In some other embodiments not shown, the input member 213 and the first transmission member 221 can also be mutually meshing cylindrical gears and face gears, respectively.

[0042] In some embodiments, the first output assembly 23 includes an output shaft 231 mounted on the output surface 121 of the second box member 12, an output universal joint 232 mounted on one end of the output shaft 231 located outside the box body 10, and an output member 233 mounted on one end of the output shaft 231 located inside the box body 10. The output shaft 231 penetrates the output surface 121 of the second box member 12 in the radial direction and is rotationally connected to the output surface 121. The output universal joint 232 can be connected to the working equipment through the output transmission rod 302, so that the rotational power transmitted from the first transmission assembly 22 to the first output assembly 23 can always be transmitted to the working equipment along the axis direction parallel to the bucket arm 202 during the relative rotation of the boom 201 and the bucket arm 202.

[0043] In this embodiment, the output member 233 and the second transmission member 222 are also two mutually meshing 45° bevel gears, so that the first transmission assembly 22 and the first output assembly 23 can achieve the transmission of rotational power at an angle of 90°. In some other embodiments not shown, the output member 233 and the second transmission member 222 can also be a mutually meshing worm wheel and a worm. In this way, the transmission of rotational power can also be achieved at an angle of 90° between the first output assembly 23 and the first transmission assembly 22. In some other embodiments not shown, the output member 233 and the second transmission member 222 can also be a mutually meshing cylindrical gear and a face gear.

[0044] Recombination Figure 1-3 As shown, in some embodiments, the housing 10 of the joint transmission device 100 is installed at the hinge of the boom 201 and the arm 202, and the axis of the first transmission shaft 220 coincides with the axis of the pin 203. The input universal joint 212 can be connected to the output end of the driving device 300 through the input transmission rod 301, and the output universal joint 232 is connected to the working device through the output transmission rod 302. As the boom 201 and the arm 202 rotate relative to each other, the input universal joint 212 and the output universal joint 232 respectively adaptively adjust the directions of the input transmission rod 301 and the output transmission rod 302, so that the angle between the input transmission rod 301 and the output transmission rod 302 can adapt to the angle between the boom 201 and the arm 202. During this process, the transmission connection between the first input component 21 and the first transmission component 22, and between the first transmission component 22 and the first output component 23 will not change, thereby ensuring that the rotational power output by the driving device 300 can be effectively transmitted to the working equipment when relative rotation occurs between the boom 201 and the boom 202.

[0045] In some embodiments, when the angle between the boom 201 and the arm 202 is too large or too small, the input transmission rod 301 can rotate the first box member 11 relative to the second box member 12 through the input universal joint 212 and the input shaft 211. In this way, the axis of the input transmission rod 301 and the axis of the input shaft 211 can be coincident, ensuring that the input universal joint 212 can effectively and smoothly transmit the rotational power on the input transmission rod 301 to the input shaft 211. Similarly, the output transmission rod 302 can rotate the second box member 12 relative to the first box member 11 through the output universal joint 232 and the output shaft 231. In this way, the axis of the output transmission rod 302 and the axis of the output shaft 231 can be coincident, ensuring that the output universal joint 232 can effectively and smoothly transmit the rotational power on the output shaft 231 to the output transmission rod 302.

[0046] Recombination Figure 3 As shown, in some embodiments, a second transmission mechanism 30 is further provided in the joint transmission device 100, for transmitting a second rotational power to the end of the stick 202, so as to add a driving power to the working equipment. The second transmission mechanism 30 includes a second input component 31 arranged in parallel with the first input component 21, a second output component 33 arranged in parallel with the first output component 23, and a second transmission component 32 arranged coaxially with the first transmission component 22. The second input component 31 has the same structure as the first input component 21, and the second output component 33 has the same structure as the first output component 23.

[0047] In some embodiments, the second transmission mechanism 30 includes a second transmission shaft 320 sleeved on the first transmission shaft 220, and a third transmission member 321 and a fourth transmission member 322 respectively disposed at two ends of the second transmission shaft 320. The third transmission member 321 is used for transmission connection to the input member 213 of the second input assembly 31, and the fourth transmission member 322 is used for transmission connection to the output member 233 of the second output assembly 33.

[0048] In this embodiment, the second transmission shaft 320 is a hollow cylindrical structure so that the first transmission shaft 220 can pass axially. The inner wall of the second transmission shaft 320 and the side wall of the first transmission shaft 220 are connected by a bearing (not shown in the figure), so that the first transmission shaft 220 and the second transmission shaft 320 can rotate relative to each other. The third transmission member 321 and the fourth transmission member 322 are hollow 45° bevel gears so that the first transmission shaft 220 can pass through. The input member 231 of the second input assembly 31 and the output member 233 of the second output assembly 33 are also 45° bevel gears so that the third transmission member 321 and the fourth transmission member 322 can be meshed and connected with the input member 231 of the second input assembly 31 and the output member 233 of the second output assembly 33.

[0049] It is understandable that in some other embodiments not shown, the joint transmission device 100 can also be provided with two, three or more second transmission mechanisms 30, so as to transmit multiple rotational forces from the boom 201 to the end of the boom 202 to drive the working equipment installed at the end of the boom 202.

[0050] 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, it can be a direct connection, or it can be indirectly connected 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.

[0051] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A joint transmission device for a telescopic arm of an excavator, characterized in that: include, A box (10) is installed at the hinge of the boom (201) and the dipper arm (202) of the excavator (200); and A first transmission mechanism (20) is installed in the housing (10), the first transmission mechanism (20) comprising a first input assembly (21) arranged on the housing (10) and used to connect to an input transmission rod (301), a first output assembly (23) arranged on the housing (10) and used to connect to an output transmission rod (302), and a first transmission assembly (22) transmission-connected to the first input assembly (21) and the first output assembly (23). The first input assembly (21) and the first output assembly (23) are configured to adjust the angle between the input transmission rod (301) and the output transmission rod (302) when the boom (201) and the arm (202) rotate relative to each other, so as to adapt to the angle between the boom (201) and the arm (202).

2. The joint transmission device for the telescopic arm of an excavator according to claim 1, characterized in that: The box body (10) includes a first box part (11) connected to the hinge of the boom (201) and the stick (202), and a second box part (12) connected to the first box part (11), wherein the second box part (12) is configured to be rotatable relative to the first box part (11) and to form a limit position along the axial direction with the first box part (11).

3. The joint transmission device for the telescopic arm of an excavator according to claim 2, characterized in that: The first box member (11) and the second box member (12) are both hollow cylindrical structures with one end open and the other end closed, the edge of the open end of the first box member (11) forms a limiting portion (112) in the radially outward direction, and the edge of the open end of the second box member (12) forms a limiting groove (122) extending in the circumferential direction in the radially outward direction, and the limiting portion (112) is accommodated in the limiting groove (122).

4. The joint transmission device for the telescopic arm of an excavator according to claim 2, characterized in that: The first input assembly (21) comprises an input shaft (211) mounted on the input surface (111) of the first housing (11), an input member (213) mounted at one end of the input shaft (211) for transmission connection with the first transmission assembly (22), and an input universal joint (212) mounted at the other end of the input shaft (211) for connection with the input transmission rod (301). The input universal joint (212) is configured to enable the rotational power of the input transmission rod (301) to be always input into the first transmission mechanism (20) when the boom (201) and the arm (202) rotate relative to each other.

5. The joint transmission device for the telescopic arm of an excavator according to claim 4, characterized in that: The first output assembly (23) comprises an output shaft (231) mounted on the output surface (121) of the second box member (12), an output member (233) mounted at one end of the output shaft (231) for transmission connection with the first transmission assembly (22), and an output universal joint (232) mounted at the other end of the output shaft (231) for connection with the output transmission rod (302). The output universal joint (232) is configured to enable the rotational power transmitted from the first transmission assembly (22) to the first output assembly (23) to be always output through the output transmission rod (302) when the boom (201) and the arm (202) rotate relative to each other.

6. The joint transmission device for the telescopic arm of an excavator according to claim 5, characterized in that: The first transmission assembly (22) comprises a first transmission shaft (220) arranged in the housing (10), and a first transmission member (221) and a second transmission member (222) respectively arranged at two ends of the first transmission shaft (220), the first transmission member (221) and the second transmission member (222) being respectively transmission-connected to the input member (213) and the output member (233).

7. The joint transmission device for the telescopic arm of an excavator according to claim 6, characterized in that: The joint transmission device (100) further comprises a second transmission mechanism (30) arranged in the box (10).

8. The joint transmission device for the telescopic arm of an excavator according to claim 7, characterized in that: The second transmission mechanism (30) comprises a second transmission assembly (32) coaxially arranged with the first transmission assembly (22), and a second input assembly (31) and a second output assembly (33) transmission-connected with the second transmission assembly (32). The second input component (31) has the same structure as the first input component (21), and the second output component (33) has the same structure as the first output component (23).

9. The joint transmission device for the telescopic arm of an excavator according to claim 8, characterized in that: The second transmission assembly (32) comprises a second transmission shaft (320) sleeved on the first transmission shaft (220), and a third transmission member (321) and a fourth transmission member (322) arranged at two ends of the second transmission shaft (320) and used for transmission connection with the second input assembly (31) and the second output assembly (33) respectively. Wherein, the second transmission shaft (320) is configured to be rotatable relative to the first transmission shaft (220).

10. The joint transmission device for the telescopic arm of an excavator according to claim 9, characterized in that: The third transmission member (321) and the fourth transmission member (322) are hollow structures so that the first transmission shaft (220) can pass through.

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