A quick-change device, method and engineering machinery for bulldozer blades

Abstract

This invention belongs to the field of engineering machinery technology, specifically relating to a quick-change device, method, and engineering machinery for bulldozer blades. The quick-change device includes a quick-change support, a quick-change mechanism, a bulldozer blade, and a bulldozer blade cylinder. The quick-change support is provided with a limiting groove and a first hinge point hole. The quick-change mechanism is provided with a second, third, fourth, and fifth hinge point hole; the fourth hinge point hole connects to the limiting groove; the fifth hinge point hole connects to the first hinge point hole; the bulldozer blade is provided with a sixth and seventh hinge point hole; the sixth hinge point hole connects to the second hinge point hole; the bulldozer blade cylinder is provided with an eighth and ninth hinge point hole; the eighth hinge point hole connects to the third hinge point hole; and the ninth hinge point hole connects to the seventh hinge point hole. This invention can reduce the number of pins required for quick installation of the bulldozer blade, significantly reduce the number and difficulty of aligning the hinge point holes, and save installation time.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery technology, specifically relating to a bulldozer blade quick-change device, method, and engineering machinery. Background Technology

[0002] Currently, hydraulic excavators connect the bulldozer blade and the excavator body via four hinge points using pins. Two of these hinge points connect the bulldozer blade end to the excavator's underframe; the other two connect the bulldozer blade cylinder to the excavator's underframe. Additionally, there are two more hinge points connecting the bulldozer blade to the cylinders. This means that assembling and disassembling the existing bulldozer blade requires disassembling and assembling the blade, two cylinders, and six pins. The existing bulldozer blade presents significant challenges in hole alignment during installation, making outdoor disassembly and assembly difficult. It requires three people working simultaneously and necessitates lifting equipment such as overhead cranes, with installation time exceeding 40 minutes. Without a precise lifting mechanism and with a limited number of personnel, bulldozer blade installation is practically impossible. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a quick-change device, method, and engineering machinery for bulldozer blades, which reduces the number of pins required for rapid installation of bulldozer blades, significantly reduces the difficulty of aligning hinge holes, and saves installation time.

[0004] To address the shortcomings of existing technologies, the technical solution provided by this invention is as follows:

[0005] A quick-change device for a bulldozer blade includes a quick-change support, a quick-change mechanism, a bulldozer blade, and a bulldozer blade cylinder.

[0006] The quick-change support is connected to the lower frame of the engineering machinery and is provided with a limiting groove and a first hinge point hole;

[0007] The quick-change mechanism is provided with a second hinge point hole, a third hinge point hole, a fourth hinge point hole, and a fifth hinge point hole; the fourth hinge point hole is connected to the limiting groove through a limiting shaft; the fifth hinge point hole is connected to the first hinge point hole through a second connecting piece.

[0008] The bulldozer blade is provided with a sixth hinge point hole and a seventh hinge point hole; the sixth hinge point hole is connected to the second hinge point hole by a third connector;

[0009] The bulldozer blade cylinder is provided with an eighth hinge point hole and a ninth hinge point hole; the eighth hinge point hole is connected to the third hinge point hole through a fourth connector; the ninth hinge point hole is connected to the seventh hinge point hole through a fifth connector.

[0010] Preferably, the quick-change support is L-shaped; the inner side of the upper part and the upper end of the bottom of the quick-change support are both connected to the lower frame of the construction machinery.

[0011] Preferably, the limiting groove is a U-shaped groove with the opening facing upwards.

[0012] Preferably, the second hinge point hole is located directly below the third hinge point hole, and the second hinge point hole is at the same height as the fifth hinge point hole; the fifth hinge point hole is located directly below the fourth hinge point hole, and the fourth hinge point hole is at the same height as the third hinge point hole.

[0013] Preferably, the quick-change mechanism is composed of two vertical plates connected together.

[0014] Preferably, it further includes a limiting device for aligning the fifth hinge hole with the first hinge hole.

[0015] Preferably, the limiting device includes a limiting block, a limiting bolt, and a limiting nut; the limiting block is connected to the quick-change mechanism, the limiting bolt is threaded to the limiting block and then fixed by the limiting nut and cooperates with the quick-change support, and the fifth hinge point hole is aligned with the first hinge point hole by adjusting the limiting bolt.

[0016] A method for quick-change bulldozer blades includes,

[0017] The sixth hinge hole is connected to the second hinge hole via a third connector, the seventh hinge hole is connected to the ninth hinge hole via a fifth connector, and the eighth hinge hole is connected to the third hinge hole via a fourth connector; the fourth hinge hole is connected to the limiting shaft.

[0018] The moving bulldozer blade locks the limiting shaft into the limiting groove;

[0019] The bulldozer blade is moved to align the fifth hinge point hole with the first hinge point hole, and the fifth hinge point hole and the first hinge point hole are connected by the second connector.

[0020] Preferably, after the limiting shaft and the limiting groove are locked together, the limiting device is adjusted to align the fifth hinge point hole with the first hinge point hole while the bulldozer blade is moved.

[0021] An engineering machine, including the aforementioned bulldozer blade quick-change device.

[0022] The beneficial effects of this invention are:

[0023] This invention designs a quick-change support and quick-change mechanism, pre-connecting the quick-change mechanism to the bulldozer blade and its hydraulic cylinder, and then connecting the quick-change mechanism to the quick-change support. This reduces the number of pin alignments required during bulldozer blade installation, significantly reduces the difficulty of aligning the hinge holes, and saves installation time. Especially when bulldozer blades need to be temporarily added to construction machinery for outdoor rescue operations, this mechanism makes outdoor bulldozer blade assembly and disassembly quick and easy. Outdoors, only one person, the driver, can operate the lifting equipment to assemble and disassemble the bulldozer blade, and the time can be controlled within 2.5 minutes, enabling rapid rescue operations.

[0024] The quick-change bulldozer blade device provided by this invention has a simple structure and high reliability. Attached Figure Description

[0025] Figure 1 This is an installation diagram of the quick-change device for bulldozer blades provided in Embodiment 1;

[0026] Figure 2 This is a partial connection diagram of the quick-change device for bulldozer blades provided in Embodiment 1;

[0027] Figure 3 A schematic diagram of the quick-change support provided in Embodiment 1;

[0028] Figure 4 A schematic diagram of the quick-change mechanism provided in Embodiment 1;

[0029] Figure 5 A schematic diagram of the limiting device provided in Embodiment 1;

[0030] Figure 6 A schematic diagram of the bulldozer blade provided in Example 1;

[0031] Figure 7 This is a schematic diagram of the bulldozer blade cylinder provided in Example 1;

[0032] Figure 8 This is a schematic diagram showing the connection between the quick-change support and the excavator undercarriage provided in Embodiment 1.

[0033] Figure 9 This is an assembly diagram of the quick-change mechanism, the bulldozer blade cylinder, and the bulldozer blade.

[0034] Wherein, 1 represents the undercarriage;

[0035] 11 is a quick-change support; 111 is a limiting groove; 112 is a first hinge point hole; 113 is a liner plate; 114 is a reinforcing plate;

[0036] 12 is the quick-change mechanism; 121 is the second hinge point hole; 122 is the third hinge point hole; 123 is the fourth hinge point hole; 124 is the fifth hinge point hole; 125 is the limiting device; 1251 is the limiting block; 1252 is the limiting bolt; 1253 is the limiting nut; 126 is the mounting step;

[0037] 13 is the bulldozer blade; 131 is the sixth hinge point hole; 132 is the seventh hinge point hole;

[0038] 14 is the hydraulic cylinder for the bulldozer blade; 141 is the eighth hinge point hole; 142 is the ninth hinge point hole;

[0039] 15 is the limiting shaft; 16 is the second connecting piece; 17 is the third connecting piece; 18 is the fourth connecting piece; 19 is the fifth connecting piece. Detailed Implementation

[0040] The present invention will be further described below with reference to the embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0041] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0044] Example 1

[0045] This embodiment provides a quick-change device for bulldozer blades. See [link / reference] Figure 1 and Figure 2 This includes a quick-change support 11, a quick-change mechanism 12, a bulldozer blade 13, and a bulldozer blade cylinder 14. See also... Figure 3 The quick-change support 11 is connected to the lower frame 1 of the construction machinery and is equipped with a limiting groove 111 and a first hinge point hole 112. (See also...) Figures 2 to 4 The quick-change mechanism 12 is provided with a second hinge point hole 121, a third hinge point hole 122, a fourth hinge point hole 123, and a fifth hinge point hole 124; the fourth hinge point hole 123 is connected to the limiting groove 111 via a limiting shaft 15; the fifth hinge point hole 124 is connected to the first hinge point hole 112 via a second connecting piece 16. See Figure 2. Figure 4 and Figure 6 The bulldozer blade 13 is provided with a sixth hinge point hole 131 and a seventh hinge point hole 132; the sixth hinge point hole 131 is connected to the second hinge point hole 121 via a third connector 17. (See also...) Figure 2 , Figure 4 and Figure 7 The bulldozer blade cylinder 14 is provided with an eighth hinge point hole 141 and a ninth hinge point hole 142; the ninth hinge point hole 142 is connected to the seventh hinge point hole 132 through a fifth connector 19; the eighth hinge point hole 141 and the third hinge point hole 122 are connected through a fourth connector 18.

[0046] The quick-change support 11 is fixedly connected to the underframe 1 of the construction machinery, such as by welding. No replacement is required. Regardless of whether a bulldozer blade is installed, this installation position does not interfere with other functions of the construction machinery, such as the installation and operation of the excavator's bucket.

[0047] Specifically, the bulldozer blade 13 is also equipped with a lifting hole to facilitate the lifting of the bulldozer blade 13.

[0048] In use, first connect the bulldozer blade 13 to the bulldozer blade cylinder 14, then connect the bulldozer blade 13 to the quick-change mechanism 12, and finally connect the quick-change mechanism 12 to the bulldozer blade cylinder 14. All three connections are single hinge points, and the bulldozer blade does not need to be hoisted at this time. Therefore, the bulldozer blade 13, the bulldozer blade cylinder 14, and the quick-change mechanism 12 can be easily and quickly connected into a whole. Next, connect the fourth hinge point hole 123 of the quick-change mechanism 12 to the limiting shaft 15. The bulldozer blade 13, bulldozer blade cylinder 14, and quick-change mechanism 12 can be lifted as a whole by hoisting, so that the limiting shaft 15 is locked with the limiting groove 111. Then adjust the position of the bulldozer blade 13, bulldozer blade cylinder 14, and quick-change mechanism 12 so that the fifth hinge point hole 124 is aligned with the first hinge point hole 112. After the fifth hinge point hole 124 is aligned with the first hinge point hole 112, the bulldozer blade 13 can be installed by connecting it with the second connector 16. At this point, the quick-change mechanism 12 and the quick-change support 11 only need to be connected at two points, including only two hinge points, one of which is a snap-fit. This greatly reduces the number of hinge points that need to be connected at the same time. Compared with the existing technology that connects the two connection hinge points between the end of the bulldozer blade and the lower frame of the construction machinery and the two hinge points between the cylinder of the bulldozer blade and the lower frame of the construction machinery at the same time when the bulldozer blade is suspended, this can greatly reduce the installation difficulty of the bulldozer blade and save a lot of installation time.

[0049] For details, see Figure 2 and Figure 3The quick-change support 11 is L-shaped. To ensure strength, its upper inner surface and bottom upper surface are connected to the lower frame 1 of the construction machinery. The number of quick-change supports 11 corresponds to the number of bulldozer blade cylinders 14. To increase strength, each quick-change support 11 is provided with a set of limiting grooves 111 and a set of first hinge point holes 112 from top to bottom. That is, the quick-change support is composed of at least two parallel, vertically erected L-shaped plates connected together, and each L-shaped plate is provided with limiting grooves 111 and first hinge point holes 112.

[0050] For details, see Figure 3 The limiting groove 111 is an opening facing upwards, or an opening angled upwards towards the bulldozer blade 13. A U-shaped groove with the opening facing upwards is preferred. The limiting groove 111 can also be a trumpet-shaped groove; the shape is not limited, as long as it allows for quick mounting of the limiting shaft 15. When installing the bulldozer blade, the bulldozer blade 13, bulldozer blade cylinder 14, and quick-change mechanism 12 are lifted as a whole, placing the limiting shaft 15 above the U-shaped groove. Then, the bulldozer blade 13, bulldozer blade cylinder 14, and quick-change mechanism 12 are lowered as a whole, causing the limiting shaft 15 to engage with the U-shaped groove. Next, the bulldozer blade 13, bulldozer blade cylinder 14, and quick-change mechanism 12 are rotated and lowered as a whole, aligning the fifth hinge point hole 124 with the first hinge point hole 112.

[0051] For details, see Figure 3 The bulldozer blade quick-change device also includes an L-shaped liner plate 113 and multiple reinforcing plates 114. The inner side of the liner plate 113 is welded and fixed to the side and bottom of the lower frame 1 of the construction machinery, the upper outer side is welded and fixed to the upper inner side of the quick-change support 11, and the lower end face of the liner plate 113 is welded and fixed to the upper end face of the bottom of the quick-change support 11. The lower end face of the reinforcing plate 114 is welded and fixed to the upper end face of the lower frame 1 of the construction machinery, and the side is welded and fixed to the inner side of the liner plate 113.

[0052] For details, see Figure 4 To increase strength, each quick-change mechanism 12 is provided with a set of second hinge point holes 121, a set of third hinge point holes 122, a set of fourth hinge point holes 123, and a set of fifth hinge point holes 124. The form of the quick-change mechanism is not limited, but it is preferably composed of two vertical plates connected together. For convenience, the second hinge point hole 121 is located directly below the third hinge point hole 122, and the second hinge point hole 121 is at the same height as the fifth hinge point hole 124; the fifth hinge point hole 124 is located directly below the fourth hinge point hole 123, and the fourth hinge point hole 123 is at the same height as the third hinge point hole 122. The second hinge point hole 121 and the third hinge point hole 122 are provided with mounting steps 126, and the mounting steps 126 are provided with bolt holes to facilitate the passage of bolts to fix the third connecting member 17 and the fourth connecting member 18.

[0053] For details, see Figure 4 , Figure 5Each quick-change mechanism 12 also includes two limiting devices 125 for aligning the fifth hinge hole 124 with the first hinge hole 112. Each limiting device 125 includes a limiting block 1251, a limiting bolt 1252, and a limiting nut 1253. The limiting block 1251 is welded to the quick-change mechanism 12, and the limiting bolt 1252 is threadedly connected to the limiting block 1251 and then fixed by the limiting nut 1253, cooperating with the quick-change support 11. After the limiting shaft 15 is engaged with the limiting groove 111, the limiting bolt 1252 is adjusted to press against the quick-change support 11. During the first trial assembly, adjusting the screw-in length of the limiting bolt 1252 adjusts the relative position of the quick-change mechanism 12 and the quick-change support 11, thus aligning the fifth hinge hole 124 with the first hinge hole 112. Once the holes are aligned correctly for the first time, the screwing length of the fixed limiting bolt 1252 can enable the quick hole alignment function during subsequent disassembly and assembly without the need to adjust the limiting bolt 1252. The fifth hinge point hole 124 and the first hinge point hole 112 can be automatically aligned. The limiting device 125 further reduces the difficulty of aligning the hinge point holes when installing the bulldozer blade.

[0054] Example 2

[0055] This embodiment provides a method for quick-change bulldozer blades, characterized by employing the aforementioned quick-change bulldozer blade device, and includes the following steps:

[0056] like Figure 9 As shown, the sixth hinge hole 131 is pre-connected to the second hinge hole 121 via the third connector 17; the ninth hinge hole 142 is connected to the seventh hinge hole 132 via the fifth connector 19; and the eighth hinge hole 141 is connected to the third hinge hole 122 via the fourth connector 18; the fourth hinge hole 123 is connected to the limiting shaft 15; simultaneously, as... Figure 8 As shown, the quick-change support 11 is also welded and fixed to the lower frame of the construction machinery as a whole;

[0057] Use a shackle to hook the lifting hole of the bulldozer blade 13, lift and move the bulldozer blade 13 so that the limiting shaft 15 is close to the limiting groove 111, and continue to move it so that the limiting shaft 15 falls into the limiting groove 111 and is locked.

[0058] The bulldozer blade 13 is lowered so that the limiting device 125 presses against the quick-change bracket 11. The limiting device 125 is adjusted so that the fifth hinge hole 124 is aligned with the first hinge hole 112. Then, the fifth hinge hole 124 and the first hinge hole 112 are connected by the second connector 16.

[0059] After the initial installation, the length of the limiting device 15 has been adjusted. During subsequent installations, when the limiting device 125 abuts against the quick-change support 11, the fifth hinge point hole 124 and the first hinge point hole 112 can automatically align, which is convenient and quick. Alternatively, the limiting device 15 can be pre-adjusted to the correct position for easier alignment during subsequent use.

[0060] When the quick-change device of the bulldozer blade is connected to the underframe 1 of the excavator, the driver alone operates the bucket teeth of the excavator to hook the lifting device for lifting. When the limiting shaft 15 falls into the limiting groove 111 and locks in place, and the limiting device 125 presses against the quick-change bracket 11, the fifth hinge hole 124 and the first hinge hole 112 are automatically aligned. The driver can connect the fifth hinge hole 124 and the first hinge hole 112 through the second connecting piece 16, and complete the quick-change process by one person.

[0061] Example 3

[0062] This embodiment provides a construction machinery, including the bulldozer blade quick-change device described in Embodiment 1. The construction machinery can be an excavator, and the connection diagram between the bulldozer blade quick-change device and the excavator's underframe 1 is shown in the figure. Figure 1 As shown. Construction machinery can also be other construction machinery fitted with bulldozer blades.

[0063] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for quick-change bulldozer blades in a quick-change device, characterized in that, It includes a quick-change support (11), a quick-change mechanism (12), a bulldozer blade (13), and a bulldozer blade cylinder (14). The quick-change support (11) is connected to the lower frame (1) of the engineering machinery and is provided with a limiting groove (111) and a first hinge point hole (112). The quick-change mechanism (12) is provided with a second hinge hole (121), a third hinge hole (122), a fourth hinge hole (123), and a fifth hinge hole (124); the fourth hinge hole (123) is connected to the limiting groove (111) through a limiting shaft (15); the fifth hinge hole (124) is connected to the first hinge hole (112) through a second connecting piece (16); The bulldozer blade (13) is provided with a sixth hinge hole (131) and a seventh hinge hole (132); the sixth hinge hole (131) and the second hinge hole (121) are connected by a third connector (17); The bulldozer blade cylinder (14) is provided with an eighth hinge point hole (141) and a ninth hinge point hole (142); the eighth hinge point hole (141) is connected to the third hinge point hole (122) through a fourth connector (18); the ninth hinge point hole (142) is connected to the seventh hinge point hole (132) through a fifth connector (19). The limiting groove (111) is a U-shaped groove with its opening facing upwards; The second hinge hole (121) is located directly below the third hinge hole (122), and the second hinge hole (121) is at the same height as the fifth hinge hole (124); the fifth hinge hole (124) is located directly below the fourth hinge hole (123), and the fourth hinge hole (123) is at the same height as the third hinge hole (122); The quick-change mechanism (12) is composed of two vertical plates connected together; The sixth hinge hole (131) is connected to the second hinge hole (121) via the third connector (17), the seventh hinge hole (132) is connected to the ninth hinge hole (142) via the fifth connector (19), and the eighth hinge hole (141) is connected to the third hinge hole (122) via the fourth connector (18); the fourth hinge hole (123) is connected to the limiting shaft (15); Move the bulldozer blade (13) to lock the limiting shaft (15) into the limiting groove (111); Move the bulldozer blade (13) to align the fifth hinge hole (124) with the first hinge hole (112) and connect the fifth hinge hole (124) with the first hinge hole (112) through the second connector (16).

2. The method for quick-change bulldozer blade using the quick-change device according to claim 1, characterized in that, The quick-change support (11) is L-shaped; the inner side of the upper part and the upper end of the bottom of the quick-change support (11) are connected to the lower frame (1) of the engineering machinery.

3. The method for quick-change bulldozer blade using the quick-change device according to claim 1, characterized in that, It also includes a limiting device (125) for aligning the fifth hinge hole (124) with the first hinge hole (112).

4. The method for quick-change bulldozer blade using the quick-change device according to claim 3, characterized in that, The limiting device (125) includes a limiting block (1251), a limiting bolt (1252), and a limiting nut (1253). The limiting block (1251) is connected to the quick-change mechanism (12). The limiting bolt (1252) is threadedly connected to the limiting block (1251) and then fixed by the limiting nut (1253) and cooperates with the quick-change support (11). The fifth hinge hole (124) is aligned with the first hinge hole (112) by adjusting the limiting bolt (1252).

5. The method for quick-change bulldozer blade using the quick-change device according to claim 1, characterized in that, After the limiting shaft (15) is locked with the limiting groove (111), while moving the bulldozer blade (13), adjust the limiting device (125) to make the fifth hinge hole (124) and the first hinge hole (112) aligned.

6. An engineering machinery, characterized in that, A method for quick-change bulldozer blades using the quick-change device according to any one of claims 1-5.

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