Counterweight positioning arrangement and engineering machine

Abstract

The application relates to the technical field of engineering machinery, and discloses a counterweight positioning structure and engineering machinery, which comprises a first counterweight positioning assembly and a second counterweight positioning assembly. The first counterweight positioning assembly comprises a first mounting seat, a first positioning seat and a first fastener, and the first positioning seat is used for matching the counterweight. The first positioning seat is provided with a first waist-shaped hole in a first direction, the first fastener can slide along the first waist-shaped hole when the first fastener is switched to a first state, and the first mounting seat is fixedly connected with the first mounting seat through the first fastener when the first fastener is switched to a second state. The second counterweight positioning assembly is used for matching the counterweight. The first counterweight positioning assembly and the second counterweight positioning assembly are arranged at intervals in a second direction, and the first direction is perpendicular to the second direction. The counterweight positioning structure disclosed by the application can complete the positioning of the counterweight without damaging and dismounting the first counterweight positioning assembly and the second counterweight positioning assembly, and the operation is more convenient.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, specifically to a counterweight positioning structure and engineering machinery. Background Technology

[0002] For construction machinery, especially cranes, counterweights are often required to support heavy loads. These counterweights should be installed at the designated mounting location during operation and at the designated storage location during non-operational periods.

[0003] The counterweight placement area has multiple support points, and the bottom surface of the counterweight rests on each support point. In order to facilitate the positioning of the counterweight, the counterweight placement area is also equipped with two positioning devices. The bottom of the counterweight is provided with a first positioning hole and a second positioning hole. When the counterweight is placed in the counterweight placement area, the two positioning devices are inserted into the first positioning hole and the second positioning hole respectively to position the counterweight.

[0004] However, the positioning device is often welded to the counterweight placement location. If the installation error of the two positioning devices is too large, causing the two positioning devices to be unable to be inserted into the first positioning hole and the second positioning hole respectively, one of the positioning devices needs to be cut off and re-welded and installed until the two positioning devices can be inserted into the first positioning hole and the second positioning hole respectively, which is inconvenient to operate.

[0005] Therefore, how to solve or improve the problem of inconvenient operation when positioning the counterweight at the place of the counterweight of engineering machinery in related technologies has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0006] This application provides a counterweight positioning structure and engineering machinery to solve or improve the problem of inconvenient operation when positioning the counterweight at the counterweight placement point of engineering machinery in related technologies.

[0007] Firstly, this application provides a counterweight positioning structure, including: The first counterweight positioning component includes a first mounting base, a first positioning base, and a first fastener. The first positioning base is used to match a first positioning hole inserted into the bottom of the counterweight. The first positioning base has a first waist-shaped hole along a first direction. The first fastener is connected to the first positioning base and is adapted to switch between a first state and a second state. When the first fastener is switched to the first state, the first fastener can slide relative to the first waist-shaped hole. When the first fastener is switched to the second state, the first mounting base is fixedly connected to the first mounting base through the first fastener. The second counterweight positioning component is used to match the second positioning hole inserted at the bottom of the counterweight. The first counterweight positioning component and the second counterweight positioning component are spaced apart along the second direction, and the first direction is perpendicular to the second direction.

[0008] In one optional embodiment, the second counterweight positioning component includes a second mounting base, a second positioning base, and a second fastener. The second positioning base is used to match a second positioning hole inserted into the bottom of the counterweight. The second positioning base is provided with a second oblong hole. The second fastener is connected to the second positioning base and is adapted to switch between a third state and a fourth state. When the second fastener is switched to the third state, the second fastener can slide relative to the second oblong hole. When the second fastener is switched to the fourth state, the second mounting base is fixedly connected to the second mounting base through the second fastener.

[0009] In one alternative embodiment, the second oblong hole is disposed along the second direction.

[0010] In one optional embodiment, the first counterweight positioning component further includes a first pad, the number of which can be selectively disposed between the first mounting base and the first positioning base; And / or, the second counterweight positioning assembly further includes a second pad, the number of which can be selectively disposed between the second mounting base and the second positioning base.

[0011] In one optional embodiment, at least two of the first fastener and the first waist-shaped hole are provided, with each of the first fasteners corresponding to one of the first waist-shaped holes.

[0012] In one optional embodiment, the first fastener is configured as a bolt, the first mounting base is provided with a first threaded hole, the first fastener passes through the first oblong hole and is screwed into the first threaded hole, when the first fastener is switched to the first state, the first fastener is loosened from the first threaded hole, when the first fastener is switched to the second state, the first fastener is tightened from the first threaded hole and can press the first positioning seat against the first mounting base.

[0013] In one alternative embodiment, the first positioning seat has a first countersunk hole on the side away from the first mounting seat, and the nut of the first fastener is disposed in the first countersunk hole.

[0014] In one optional embodiment, the first positioning seat has a first inclined surface on the side edge away from the first mounting seat, and the first inclined surface is used to guide the first mounting seat to be inserted into the first positioning hole.

[0015] In one optional embodiment, the second positioning seat has a second inclined surface on the side edge away from the second mounting seat, the second inclined surface being used to guide the second mounting seat to be inserted into the second positioning hole.

[0016] Secondly, this application also provides an engineering machinery, including any of the counterweight positioning structures described above.

[0017] This application provides a counterweight positioning structure. When the first positioning seat and the second counterweight positioning component of the first counterweight positioning assembly are offset by a large distance along a first direction, causing them to fail to align with the first and second positioning holes inserted into the bottom of the counterweight, respectively, a first fastener is switched to a first state. Then, the first positioning seat is moved along the first direction until the relative offset between the first positioning seat and the second counterweight positioning component along the first direction meets the requirements, allowing them to align with the first and second positioning holes inserted into the bottom of the counterweight. Switching the first fastener to a second state then completes the positioning of the counterweight. This eliminates the need to damage or disassemble the first and second counterweight positioning components, making operation more convenient. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an exploded view of a counterweight positioning structure according to an embodiment of this application; Figure 2 for Figure 1 A magnified view of part A in the diagram; Figure 3 This is an exploded view of the first counterweight positioning component of a counterweight positioning structure according to an embodiment of this application; Figure 4 This is an exploded view of the second counterweight positioning component of a counterweight positioning structure according to an embodiment of this application; Figure 5 This is a schematic diagram illustrating the cooperation between a counterweight positioning structure and a counterweight according to an embodiment of this application. Figure 6 This is a schematic diagram of a counterweight positioning structure installed on a platform according to an embodiment of this application.

[0020] Explanation of reference numerals in the attached figures: 1. First counterweight positioning assembly; 11. First mounting base; 111. First threaded hole; 12. First positioning seat; 121. First oblong hole; 122. First countersunk hole; 123. First inclined surface; 13. First fastener; 14. First washer; 141. First through hole; 2. Second counterweight positioning assembly; 21. Second mounting base; 211. Second threaded hole; 22. Second positioning seat; 221. Second oblong hole; 222. Second countersunk hole; 223. Second inclined surface; 23. Second fastener; 24. Second washer; 241. Second through hole; 3. Counterweight; 31. First positioning hole; 32. Second positioning hole; 4. Platform; X, first direction; Y, second direction. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The following is combined Figures 1 to 6 This describes an embodiment of the present application.

[0023] According to embodiments of this application, in one aspect, a counterweight positioning structure is provided, such as... Figure 1 As shown, it includes a first counterweight positioning component 1 and a second counterweight positioning component 2. The first counterweight positioning component 1 is used to match the first positioning hole 31 inserted into the bottom of the counterweight 3, and the second counterweight positioning component 2 is used to match the second positioning hole 32 inserted into the bottom of the counterweight 3.

[0024] like Figure 2 and Figure 3 As shown, the first counterweight positioning assembly 1 includes a first mounting base 11, a first positioning base 12, and a first fastener 13. The first positioning base 12 is used to mate with a first positioning hole 31 inserted into the bottom of the counterweight 3. A first oblong hole 121 is provided on the first positioning base 12 along the first direction X. The first fastener 13 is connected to the first positioning base 12 and is adapted to switch between a first state and a second state. When the first fastener 13 is switched to the first state, the first fastener 13 can slide relative to the first oblong hole 121, so that the first positioning base 12 can move along the first direction X. When the first fastener 13 is switched to the second state, the first mounting base 11 is fixedly connected to the first mounting base 11 through the first fastener 13.

[0025] The first counterweight positioning component 1 and the second counterweight positioning component 2 are spaced apart along the second direction Y, wherein the first direction X is perpendicular to the second direction Y.

[0026] With this configuration, when the first positioning seat 12 and the second counterweight positioning component 2 of the first counterweight positioning component 1 are offset by a large distance along the first direction X, causing the first positioning seat 12 and the second counterweight positioning component 2 of the first counterweight positioning component 1 to be unable to match the first positioning hole 31 and the second positioning hole 32 inserted into the bottom of the counterweight 3 respectively, the first fastener 13 is switched to the first state, and then the first positioning seat 12 is moved along the first direction X until the relative offset of the first positioning seat 12 and the second counterweight positioning component 2 along the first direction X meets the requirements, so that the first positioning seat 12 and the second counterweight positioning component 2 of the first counterweight positioning component 1 can match the first positioning hole 31 and the second positioning hole 32 inserted into the bottom of the counterweight 3 respectively. Then, the first fastener 13 is switched to the second state, and the positioning of the counterweight 3 is completed. This eliminates the need to damage and disassemble the first counterweight positioning component 1 and the second counterweight positioning component 2, making the operation more convenient.

[0027] The first counterweight positioning component 1 and the second counterweight positioning component 2 are both mounted on the platform 4, with the first direction X and the second direction Y both parallel to the surface of the platform 4. The first direction X can be the front-back direction of the platform 4, and the second direction Y can be the left-right direction of the platform 4.

[0028] In one embodiment, such as Figure 4 As shown, the second counterweight positioning assembly 2 includes a second mounting base 21, a second positioning base 22, and a second fastener 23. The second positioning base 22 is used to mate with the second positioning hole 32 inserted into the bottom of the counterweight 3. The second positioning base 22 is provided with a second oblong hole 221. The second fastener 23 is connected to the second positioning base 22 and is adapted to switch between a third state and a fourth state. When the second fastener 23 is switched to the third state, the second fastener 23 can slide relative to the second oblong hole 221, so that the second positioning base 22 can move along the length direction of the second oblong hole 221. When the second fastener 23 is switched to the fourth state, the second mounting base 21 is fixedly connected to the second mounting base 21 through the second fastener 23.

[0029] With this configuration, when the first positioning seat 12 of the first counterweight positioning component 1 and the second positioning seat 22 of the second counterweight positioning component 2 are offset by a large distance, not only can the first fastener 13 be switched to the first state to adjust the first positioning seat 12 to a suitable position, but the second fastener 23 can also be switched to the third state to adjust the second positioning seat 22 to a suitable position. Ultimately, the relative offset between the first positioning seat 12 of the first counterweight positioning component 1 and the second positioning seat 22 of the second counterweight positioning component 2 meets the requirements, making operation more flexible and convenient.

[0030] After adjustment, switch the first fastener 13 to the second state and the second fastener 23 to the fourth state to fix the first positioning seat 12 and the second positioning seat 22.

[0031] In one embodiment, such as Figure 6 As shown, the second oblong hole 221 is disposed along the second direction Y. Thus, when the second fastener 23 switches to the third state, the second fastener 23 can slide relative to the second oblong hole 221, so that the second positioning seat 22 can slide along the second direction Y.

[0032] With this configuration, when the first positioning seat 12 of the first counterweight positioning component 1 and the second positioning seat 22 of the second counterweight positioning component 2 are both offset by a large distance along the first direction X and the second direction Y, the first fastener 13 can be switched to the first state, and then the first positioning seat 12 can be moved along the first direction X until the relative offset of the first positioning seat 12 and the second positioning seat 22 along the first direction X meets the requirements, at which point the first fastener 13 can be switched to the second state.

[0033] Then switch the second fastener 23 to the third state, and then move the second positioning seat 22 along the second direction Y until the relative offset between the second positioning seat 22 and the first positioning seat 12 along the second direction Y meets the requirements, and then switch the second fastener 23 to the fourth state.

[0034] In this way, without damaging or dismantling the first counterweight positioning component 1 and the second counterweight positioning component 2, adjustments can be made not only when the first counterweight positioning component 1 and the second counterweight positioning component 2 are relatively offset by a large distance along the first direction X, but also when the first counterweight positioning component 1 and the second counterweight positioning component 2 are relatively offset by a large distance along the second direction Y, thus improving applicability.

[0035] In one embodiment, such as Figure 2 and Figure 3 As shown, the first counterweight positioning component 1 also includes a first pad 14, wherein the number of first pads 14 can be selectively set between the first mounting base 11 and the first positioning base 12, that is, a corresponding number of first pads 14 can be set between the first mounting base 11 and the first positioning base 12 so that the distance between the first mounting base 11 and the first positioning base 12 meets the requirements.

[0036] With this configuration, when the first positioning seat 12 of the first counterweight positioning component 1 and the second positioning seat 22 of the second counterweight positioning component 2 are offset by a large distance in the height direction, and the second positioning seat 22 is higher, a corresponding number of first shims 14 are set between the first mounting seat 11 and the first positioning seat 12 to increase the height of the first positioning seat 12, thereby making the distance of the relative offset between the first positioning seat 12 and the second positioning seat 22 in the height direction meet the requirements, and making the operation more convenient.

[0037] A first through hole 141 can be formed on the first washer 14, through which the first fastener 13 passes. The first through hole 141 can be set as a strip to facilitate the movement of the first washer 14 with the first positioning seat 12.

[0038] In one embodiment, such as Figure 4 As shown, the second counterweight positioning component 2 also includes a second pad 24, wherein the number of second pads 24 can be selectively arranged between the second mounting base 21 and the second positioning base 22, that is, a corresponding number of second pads 24 can be arranged between the second mounting base 21 and the second positioning base 22 so that the distance between the second mounting base 21 and the second positioning base 22 meets the requirements.

[0039] With this configuration, when the first positioning seat 12 of the first counterweight positioning component 1 and the second positioning seat 22 of the second counterweight positioning component 2 are offset by a large distance in the height direction, and the first positioning seat 12 is higher, a corresponding number of second shims 24 are set between the second mounting seat 21 and the second positioning seat 22 to increase the height of the second positioning seat 22, thereby making the distance of the relative offset between the first positioning seat 12 and the second positioning seat 22 in the height direction meet the requirements, and making the operation more convenient.

[0040] A second through hole 241 can be provided on the second washer 24, through which the second fastener 23 passes. The second through hole 241 can be set as a strip to facilitate the movement of the second washer 24 with the second positioning seat 22.

[0041] In one embodiment, the first counterweight positioning component 1 further includes a first pad 14, and the second counterweight positioning component 2 further includes a second pad 24. The number of first pads 14 can be selectively disposed between the first mounting base 11 and the first positioning base 12, and the number of second pads 24 can be selectively disposed between the second mounting base 21 and the second positioning base 22.

[0042] With this configuration, when the first positioning seat 12 of the first counterweight positioning component 1 and the second positioning seat 22 of the second counterweight positioning component 2 are relatively offset by a large distance in the height direction: If the second positioning seat 22 is higher, a corresponding number of first shims 14 are provided between the first mounting seat 11 and the first positioning seat 12 to increase the height of the first positioning seat 12, thereby making the relative offset distance between the first positioning seat 12 and the second positioning seat 22 in the height direction meet the requirements.

[0043] If the first positioning seat 12 is too high, a corresponding number of second shims 24 are set between the second mounting seat 21 and the second positioning seat 22 to increase the height of the second positioning seat 22, thereby making the relative offset distance between the first positioning seat 12 and the second positioning seat 22 in the height direction meet the requirements, and making the operation more convenient.

[0044] Therefore, regardless of which of the first positioning seat 12 and the second positioning seat 22 is relatively higher, it can be adjusted so that the relative offset between the two in the height direction meets the requirements, making the operation more convenient.

[0045] In one embodiment, at least two first fasteners 13 and at least two first waist-shaped holes 121 are provided, with each first fastener 13 corresponding to one first waist-shaped hole 121.

[0046] For the corresponding first fastener 13 and first oblong hole 121, when the first fastener 13 is switched to the first state, the first fastener 13 can slide relative to the first oblong hole 121, so that the first positioning seat 12 can move in the first direction X. When the first fastener 13 is switched to the second state, the first mounting seat 11 is fixedly connected to the first mounting seat 11 through the first fastener 13.

[0047] In this way, when the first positioning seat 12 moves along the first direction X, it is constrained by at least two first fasteners 13, ensuring that the first positioning seat 12 can only move along the first direction X, making the adjustment of the position of the first positioning seat 12 more accurate.

[0048] In one embodiment, at least two second fasteners 23 and two oblong holes 221 are provided, and each second fastener 23 corresponds to a second oblong hole 221.

[0049] For the corresponding second fastener 23 and second oblong hole 221, when the second fastener 23 is switched to the third state, the second fastener 23 can slide relative to the second oblong hole 221, so that the second positioning seat 22 can move along the length direction of the second oblong hole 221. When the second fastener 23 is switched to the fourth state, the second mounting seat 21 is fixedly connected to the second mounting seat 21 through the second fastener 23.

[0050] In this way, when the second positioning seat 22 moves along the length direction of the second waist-shaped hole 221, it is constrained by at least two second fasteners 23, ensuring that the second positioning seat 22 can only move along the length direction of the second waist-shaped hole 221, making the adjustment of the position of the second positioning seat 22 more accurate.

[0051] In one embodiment, the first fastener 13 is configured as a bolt, and the first mounting base 11 is provided with a first threaded hole 111. The first fastener 13 passes through the first oblong hole 121 and is screwed into the first threaded hole 111. When the first fastener 13 is switched to the first state, the first fastener 13 is loosened from the first threaded hole 111. When the first fastener 13 is switched to the second state, the first fastener 13 is tightened from the first threaded hole 111 and can press the first positioning seat 12 against the first mounting base 11.

[0052] Specifically, when it is necessary to adjust the first positioning seat 12 along the first direction X, the first fastener 13 is loosened, so that the first fastener 13 releases its clamping force on the first positioning seat 12. At this time, the first fastener 13 and the first oblong hole 121 can slide relative to each other, so that the first fastener 13 and the first positioning seat 12 can slide relative to each other along the first direction X. When the first fastener 13 is relatively stationary in the first direction X, the first positioning seat 12 can move along the first direction X.

[0053] After the first positioning seat 12 is moved to the corresponding position, the relative offset of the first positioning seat 12 and the second counterweight positioning component 2 along the first direction X meets the requirements. At this time, the first fastener 13 is tightened so that the first fastener 13 presses the first positioning seat 12 against the first mounting seat 11 to fix the first positioning seat 12, making the operation more convenient.

[0054] In one embodiment, such as Figure 3 As shown, the first positioning seat 12 has a first countersunk hole 122 on the side away from the first mounting seat 11, and the nut of the first fastener 13 is disposed in the first countersunk hole 122.

[0055] Thus, in the height direction, the nut of the first fastener 13 protrudes from the side of the first positioning seat 12 away from the first mounting seat 11, avoiding interference with the counterweight 3.

[0056] In one embodiment, the second fastener 23 is configured as a bolt, and the second mounting base 21 is provided with a second threaded hole 211. The second fastener 23 passes through the second oblong hole 221 and is screwed into the second threaded hole 211. When the second fastener 23 is switched to the third state, the second fastener 23 is loosened from the second threaded hole 211. When the second fastener 23 is switched to the fourth state, the second fastener 23 is tightened from the second threaded hole 211 and can press the second positioning seat 22 against the second mounting base 21.

[0057] Specifically, when the second positioning seat 22 needs adjustment, the second fastener 23 is loosened, thus releasing the clamping force of the second fastener 23 on the second positioning seat 22. At this time, the second fastener 23 and the second oblong hole 221 can slide relative to each other, thereby allowing the second fastener 23 and the second positioning seat 22 to slide relative to each other. When the second fastener 23 is relatively stationary, the second positioning seat 22 can move.

[0058] After moving the second positioning seat 22 to the corresponding position, the relative offset between the second positioning seat 22 and the first positioning seat 12 meets the requirements. At this time, tighten the second fastener 23 so that the second fastener 23 presses the second positioning seat 22 against the second mounting seat 21 to fix the second positioning seat 22, making the operation more convenient.

[0059] In one embodiment, such as Figure 4As shown, the second positioning seat 22 has a second countersunk hole 222 on the side away from the second mounting seat 21, and the nut of the second fastener 23 is disposed in the second countersunk hole 222.

[0060] Thus, in the height direction, the nut of the second fastener 23 protrudes from the side of the second positioning seat 22 away from the second mounting seat 21, avoiding interference with the counterweight 3.

[0061] In one embodiment, such as Figure 3 and Figure 5 As shown, the first positioning seat 12 has a first inclined surface 123 on its edge away from the first mounting seat 11. When the first positioning seat 12 is inserted into the first positioning hole 31 at the bottom of the counterweight 3, the edge of the first positioning hole 31 abuts against the first inclined surface 123, thereby guiding the first mounting seat 11 into the first positioning hole 31. This makes it easier for the first positioning seat 12 to be inserted into the first positioning hole 31, thus making positioning more convenient when placing the counterweight 3.

[0062] In one embodiment, such as Figure 4 and Figure 5 As shown, the second positioning seat 22 has a second inclined surface 223 on its edge away from the second mounting seat 21. When the second positioning seat 22 is inserted into the second positioning hole 32 at the bottom of the counterweight 3, the edge of the second positioning hole 32 abuts against the second inclined surface 223, thereby guiding the second mounting seat 21 into the second positioning hole 32. This makes it easier for the second positioning seat 22 to be inserted into the second positioning hole 32, thus making positioning more convenient when placing the counterweight 3.

[0063] According to an embodiment of this application, another aspect provides an engineering machine that includes any of the above-mentioned counterweight positioning structures.

[0064] The construction machinery also includes a platform 4, on which the first mounting base 11 and the second mounting base 21 are both mounted.

[0065] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A counterweight positioning structure, characterized in that, include: The first counterweight positioning component (1) includes a first mounting base (11), a first positioning base (12), and a first fastener (13). The first positioning base (12) is used to match the first positioning hole (31) inserted into the bottom of the counterweight (3). The first positioning base (12) is provided with a first waist-shaped hole (121) along the first direction (X). The first fastener (13) is connected to the first positioning base (12) and is adapted to switch between a first state and a second state. When the first fastener (13) is switched to the first state, the first fastener (13) can slide relative to the first waist-shaped hole (121). When the first fastener (13) is switched to the second state, the first mounting base (11) is fixedly connected to the first mounting base (11) through the first fastener (13). The second counterweight positioning component (2) is used to match the second positioning hole (32) inserted at the bottom of the counterweight (3). The first counterweight positioning component (1) and the second counterweight positioning component (2) are spaced apart along the second direction (Y). The first direction (X) is perpendicular to the second direction (Y).

2. The counterweight positioning structure according to claim 1, characterized in that, The second counterweight positioning component (2) includes a second mounting base (21), a second positioning base (22), and a second fastener (23). The second positioning base (22) is used to match the second positioning hole (32) inserted into the bottom of the counterweight (3). The second positioning base (22) is provided with a second waist-shaped hole (221). The second fastener (23) is connected to the second positioning base (22) and is adapted to switch between a third state and a fourth state. When the second fastener (23) is switched to the third state, the second fastener (23) can slide relative to the second waist-shaped hole (221). When the second fastener (23) is switched to the fourth state, the second mounting base (21) is fixedly connected to the second mounting base (21) through the second fastener (23).

3. The counterweight positioning structure according to claim 2, characterized in that, The second waist-shaped hole (221) is provided along the second direction (Y).

4. The counterweight positioning structure according to claim 2, characterized in that, The first counterweight positioning assembly (1) further includes a first pad (14), the number of which can be selectively arranged between the first mounting base (11) and the first positioning base (12); And / or, the second counterweight positioning assembly (2) further includes a second pad (24), the number of which may be disposed between the second mounting base (21) and the second positioning base (22).

5. The counterweight positioning structure according to claim 2, characterized in that, At least two of the first fastener (13) and the first waist-shaped hole (121) are provided, and each of the first fasteners (13) corresponds to the first waist-shaped hole (121).

6. The counterweight positioning structure according to claim 1, characterized in that, The first fastener (13) is a bolt, and the first mounting base (11) is provided with a first threaded hole (111). The first fastener (13) passes through the first waist-shaped hole (121) and is screwed into the first threaded hole (111). When the first fastener (13) is switched to the first state, the first fastener (13) is loosened in the first threaded hole (111). When the first fastener (13) is switched to the second state, the first fastener (13) is tightened in the first threaded hole (111) and can press the first positioning seat (12) against the first mounting base (11).

7. The counterweight positioning structure according to claim 6, characterized in that, The first positioning seat (12) has a first countersunk hole (122) on the side away from the first mounting seat (11), and the nut of the first fastener (13) is disposed in the first countersunk hole (122).

8. The counterweight positioning structure according to claim 1, characterized in that, The first positioning seat (12) has a first inclined surface (123) on one side edge away from the first mounting seat (11), and the first inclined surface (123) is used to guide the first mounting seat (11) to be inserted into the first positioning hole (31).

9. The counterweight positioning structure according to claim 2, characterized in that, The second positioning seat (22) has a second inclined surface (223) on the side edge away from the second mounting seat (21), and the second inclined surface (223) is used to guide the second mounting seat (21) to be inserted into the second positioning hole (32).

10. An engineering machinery, characterized in that, Includes the counterweight positioning structure as described in any one of claims 1-9.

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