Combined counterweight device for engineering machinery

Abstract

The present invention discloses a combined counterweight device for engineering machinery, including a driving mechanism and a counterweight unit, wherein the driving mechanism includes a top plate, a center screw, a guide rod and a driving motor, wherein the center screw is rotatably arranged at the bottom of the top plate, the guide rod is arranged in a circular array at the bottom of the top plate, the driving motor is arranged at the top of the top plate, the output end of the driving motor is connected to the center screw by transmission, the counterweight unit is inserted under the top plate through the center screw and the guide rod, a traction machine is arranged at the top of the top plate, the traction machine is arranged in multiple groups, a connecting plate is arranged under the center screw, a lead wire is arranged between the traction machine and the connecting plate, the lead wire passes through the top plate to connect the traction machine and the connecting plate, and a connecting platform is arranged at the top of the top plate. The present invention belongs to the technical field of engineering machinery, and specifically refers to a combined counterweight device for engineering machinery; the present invention solves the problem that the adjustable counterweight device on the market is not convenient for adjusting the counterweight and cannot adjust the counterweight during use through structural design.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering machinery, and specifically refers to a combined counterweight device for engineering machinery. Background Art

[0002] Counterweight is a device used on construction machinery to balance the torque of the hoisted weight relative to the center of rotation. Its purpose is to keep the machinery stable. Currently, it is mainly divided into fixed-weight counterweight devices and adjustable-weight counterweight devices. Fixed-weight counterweight devices are weight blocks with constant weight, which are usually used on machinery with fixed usage scenarios and have a smaller range of applications. Adjustable counterweight devices with flexibly adjustable counterweight weight are mostly used on the market. The counterweight can be flexibly adjusted according to the usage scenario and have a wider range of applications. However, the adjustable counterweight devices on the market usually require manual labor or additional machinery to assist in disassembly and assembly to adjust the counterweight block, which is not convenient enough. At the same time, when the counterweight needs to be adjusted, it needs to be reinstalled or disassembled, and the counterweight cannot be adjusted during use, which delays the construction progress. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a combined counterweight device for engineering machinery, which effectively solves the problem that the adjustable counterweight devices currently on the market are not convenient for adjusting the counterweight and cannot adjust the counterweight during use.

[0004] The technical solution adopted by the present invention is as follows: The present invention provides a combined counterweight device for engineering machinery, including a driving mechanism and a counterweight unit, the driving mechanism including a top plate, a center screw, a guide rod and a driving motor, the center screw is rotatably arranged at the bottom of the top plate, the guide rod is arranged in a circular array at the bottom of the top plate, the driving motor is arranged at the top of the top plate, the output end of the driving motor is transmission-connected to the center screw, and the counterweight unit is inserted under the top plate through the center screw and the guide rod.

[0005] Preferably, a traction machine is provided on the top of the top plate, and the traction machine is arranged in multiple groups. A connecting plate is provided under the central screw, and a lead wire is provided between the traction machine and the connecting plate. The lead wire passes through the top plate to connect the traction machine and the connecting plate.

[0006] Furthermore, a connecting platform is provided on the top of the top plate.

[0007] Furthermore, the counterweight unit includes a counterweight block and a rotating drum, the counterweight block is penetrated by a central opening, and the rotating drum is rotatably clamped in the central opening.

[0008] Furthermore, a guide hole is formed through the counterweight block, the diameter of the guide hole is slightly larger than the diameter of the guide rod, and the side wall of the guide rod is in contact with the inner wall of the guide hole.

[0009] Furthermore, the rotating cylinder includes a threaded sleeve and positioning rods, the positioning rods are arranged in a circular array on the side wall of the threaded sleeve, and the threaded sleeve is penetrated by a screw hole that is threadably engaged with the central screw rod.

[0010] Furthermore, a side wall of the central opening is provided with an annular groove, and the positioning rod is arranged in the annular groove.

[0011] Furthermore, a locking groove 1 is provided in the annular groove, and the locking groove 1 is longitudinally arranged. The locking groove 1 penetrates the top wall of the annular groove. A longitudinal locking block is slidably provided in the locking groove 1. A spring 1 is provided between the bottom wall of the longitudinal locking block and the bottom wall of the locking groove 1. A through groove is provided on the side of the longitudinal locking block close to the central opening. In the initial state, the spring 1 pushes the upper half of the longitudinal locking block out of the locking groove 1 and leaks out from the top of the counterweight block. The longitudinal locking block blocks the positioning rod, and the rotating drum cannot rotate. When the longitudinal locking block is pressed downward, the through groove is flush with the positioning rod, the longitudinal locking block does not block the positioning rod, and the rotating drum can rotate.

[0012] Furthermore, the side wall of the annular groove is provided with a locking groove 2, the locking groove 2 is arranged horizontally, and a one-way locking block is slidably provided in the locking groove 2, the one-way locking block is a wedge-shaped block inclinedly arranged near one end of the rotating drum, and a spring 2 is provided between the one-way locking block and the locking groove 2. In the initial state, the spring 2 pushes the one-way locking block outward, and the one-way locking block allows the rotating drum to rotate only in one direction. When the rotating drum rotates in the direction specified by the one-way locking block, the positioning rod pushes the one-way locking block into the locking groove 2; when the rotating drum rotates in the direction opposite to the direction specified by the one-way locking block, the positioning rod cannot push the one-way locking block into the locking groove 2, and the rotating drum cannot rotate.

[0013] When the center screw is inserted into the threaded sleeve and the guide rod is inserted into the guide hole, when the drive motor rotates forward, the center screw drives the counterweight unit upward through the threaded sleeve. Preferably, the one-way locking block limits the rotating drum to rotate only in the same direction as the rotation direction when the center screw drives the counterweight unit upward.

[0014] Preferably, more drive motors and center screws can be arranged according to the usage scenarios, and the counterweight block can be provided with the same number of center openings, annular grooves, locking groove one, longitudinal locking blocks, spring one, through grooves, locking groove two, one-way locking blocks, spring two and rotating drum as the center screw, so as to adapt to usage scenarios with higher requirements for the counterweight weight.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows: the scheme provides a combined counterweight device for engineering machinery, in which a driving motor drives a central screw to drive several counterweight units upward in sequence, and in the process of a single counterweight unit moving upward, a longitudinal locking block locks a rotating drum, and the rotating drum is fixed in the central opening, and the counterweight unit is limited by a guide rod, and the central screw drives the counterweight unit upward to automatically assemble the counterweight. When it is necessary to increase the counterweight, it is only necessary to place the counterweight unit directly below the driving mechanism, and insert the central screw and the guide rod into the threaded sleeve and the guide hole. Start the driving motor to continue to assemble the counterweight. When the assembled counterweight unit continues to assemble the counterweight, the longitudinal locking block contacts the bottom wall of the top plate or the bottom wall of the upper counterweight unit and is pressed into the locking groove. At this time, the through groove is flush with the positioning rod, and the longitudinal locking block does not block the positioning rod. At the same time, the rotation direction of the central screw is the same as the limited direction of the one-way locking block. The rotating drum is in an active state. During the process of the central screw moving the newly added counterweight unit upward by rotation, the rotating drum of the assembled counterweight unit will only rotate in the central opening following the central screw, and will not cause the assembled counterweight unit to rotate. The counterweight unit is displaced. When the counterweight needs to be reduced, the driving motor drives the center screw to reverse. When the center screw reverses, it is restricted by the one-way locking block and the drum cannot rotate with the center screw. The center screw drives the counterweight unit downward until the counterweight unit to be removed is separated from the center screw and the guide rod, and the counterweight is automatically removed. The traction machine, lead wire and connecting plate can assist in disassembling the counterweight unit during use. When the counterweight needs to be increased, the counterweight unit is placed on the connecting plate, and the traction machine lifts the connecting plate upward to make the counterweight unit contact the guide rod and the bottom of the center screw, which is convenient for installing the counterweight unit. When the counterweight needs to be lowered, before the center screw removes the counterweight unit, the traction machine lifts the connecting plate to the bottom of the driving mechanism in advance, guides the counterweight unit, and slowly places it on the ground to prevent the counterweight unit from being thrown directly to the ground and causing harm to the operator, and to prevent the counterweight unit from being damaged by the impact when it falls to the ground. At the same time, several counterweight units can be pre-stacked on the connecting plate to facilitate adjustment of the counterweight during use. The present invention can effectively reduce the workload when adjusting the counterweight, and can also adjust the counterweight during use, thereby improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a combined counterweight device for engineering machinery provided by the present invention;

[0017] Figure 2 A schematic diagram of the structure of a combined counterweight device for engineering machinery provided by the present invention without a counterweight unit;

[0018] Figure 3 A schematic diagram of the structure of the counterweight unit provided by the present invention;

[0019] Figure 4A schematic diagram of the structure of the rotating drum provided by the present invention;

[0020] Figure 5 A front cross-sectional view of a counterweight unit provided by the present invention;

[0021] Figure 6 for Figure 5 A partial enlarged view of part A in FIG.

[0022] Figure 7 A top cross-sectional view of the counterweight unit provided by the present invention;

[0023] Figure 8 for Figure 7 A partial enlarged view of part B in FIG.

[0024] Among them, 1. driving mechanism, 2. traction machine, 3. connecting plate, 4. lead wire, 5. counterweight unit, 6. connecting table, 101. top plate, 102. center screw, 103. guide rod, 104. driving motor, 51. counterweight block, 52. rotating drum, 511. center opening, 512. guide hole, 513. annular groove, 514. locking groove one, 515. longitudinal locking block, 516. spring one, 517. through groove, 518. locking groove two, 519. one-way locking block, 5110. spring two, 521. threaded sleeve, 522. positioning rod.

[0025] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0028] like Figure 1-Figure 8As shown, the present invention provides a combined counterweight device for construction machinery, including a driving mechanism 1 and a counterweight unit 5, the driving mechanism 1 includes a top plate 101, a central screw 102, a guide rod 103 and a driving motor 104, the central screw 102 is rotatably arranged at the bottom of the top plate 101, the guide rod 103 is arranged in a circular array at the bottom of the top plate 101, the driving motor 104 is arranged at the top of the top plate 101, the output end of the driving motor 104 is transmission-connected with the central screw 102, the counterweight unit 5 is inserted under the top plate 101 through the central screw 102 and the guide rod 103, a traction machine 2 is arranged at the top of the top plate 101, and the traction machine 2 is arranged in multiple groups. The traction machine 2 is a prior art and is not described in detail here, a connecting plate 3 is arranged under the central screw 102, a lead wire 4 is arranged between the traction machine 2 and the connecting plate 3, the lead wire 4 passes through the top plate 101 to connect the traction machine 2 and the connecting plate 3, and a connecting platform 6 is arranged at the top of the top plate 101, and the connecting platform 6 is used to connect the present invention with the construction machinery.

[0029] The counterweight unit 5 includes a counterweight block 51 and a rotating drum 52. The counterweight block 51 is penetrated by a central opening 511. The rotating drum 52 is rotatably clamped in the central opening 511. The counterweight block 51 is penetrated by a guide hole 512. The aperture of the guide hole 512 is slightly larger than the diameter of the guide rod 103. The side wall of the guide rod 103 fits with the inner wall of the guide hole 512. The rotating drum 52 includes a threaded sleeve 521 and a positioning rod 522. The positioning rod 522 is arranged in a circular array on the side wall of the threaded sleeve 521. The threaded sleeve 521 is penetrated by a screw hole that is threadedly engaged with the center screw 102.

[0030] An annular groove 513 is provided on the side wall of the central opening 511, and the positioning rod 522 is arranged in the annular groove 513. A locking groove 1 514 is provided in the annular groove 513. The locking groove 1 514 is longitudinally arranged, and the locking groove 1 514 penetrates the top wall of the annular groove 513. A longitudinal locking block 515 is slidably provided in the locking groove 1 514. A spring 1 516 is provided between the bottom wall of the longitudinal locking block 515 and the bottom wall of the locking groove 1 514. A through groove 517 is provided on the side of the longitudinal locking block 515 close to the central opening 511. In the initial state, the spring 1 516 pushes the upper half of the longitudinal locking block 515 out of the locking groove 1 514 and leaks out from the top of the counterweight 51. The longitudinal locking block 515 blocks the positioning rod 522, and the rotating drum 52 cannot rotate. When the longitudinal locking block 515 is pressed downward, the through groove 517 is flush with the positioning rod 522, the longitudinal locking block 515 does not block the positioning rod 522, and the rotating drum 52 can rotate.

[0031] A second locking groove 518 is provided on the side wall of the annular groove 513. The second locking groove 518 is arranged horizontally. A one-way locking block 519 is slidably provided in the second locking groove 518. A second spring 5110 is provided between the one-way locking block 519 and the second locking groove 518. In the initial state, the second spring 5110 pushes the one-way locking block 519 outward, and the one-way locking block 519 allows the rotating drum 52 to rotate only in one direction. When the rotating drum 52 rotates in the direction specified by the one-way locking block 519, the positioning rod 522 pushes the one-way locking block 519 into the second locking groove 518. When the rotating drum 52 rotates in the direction opposite to the direction specified by the one-way locking block 519, the positioning rod 522 cannot push the one-way locking block 519 into the second locking groove 518, and the rotating drum 52 cannot rotate.

[0032] The center screw 102 is inserted into the threaded sleeve 521 and the guide rod 103 is inserted into the guide hole 512. When the driving motor 104 rotates forward, the center screw 102 drives the counterweight unit 5 upward through the threaded sleeve 521. The one-way locking block 519 limits the rotating drum 52 to only rotate in the same direction as the rotation direction when the center screw 102 drives the counterweight unit 5 upward.

[0033] More drive motors 104 and center screws 102 can be arranged according to the usage scenario, and the counterweight block 51 can be provided with the same number of center openings 511, annular grooves 513, locking grooves 1 514, longitudinal locking blocks 515, springs 1 516, through grooves 517, locking grooves 2 518, one-way locking blocks 519, springs 2 5110 and rotating drum 52 as the center screws 102, so as to increase the upper limit of the lifting weight, thereby adapting to usage scenarios with higher requirements for the counterweight weight (not shown in the drawings).

[0034] When in use, the present invention is first connected to the construction machinery through the connecting platform 6, and then several counterweight units 5 are aligned and stacked on the connecting plate 3. Then, the traction machine 2 is started to lift the connecting plate 3 and the counterweight unit 5 to the bottom of the central screw 102 and the guide rod 103. When installing the counterweight, the central screw 102 and the guide rod 103 are respectively inserted into the threaded sleeve 521 and the guide hole 512 of the current counterweight unit 5, and the guide rod 103 is inserted into the guide hole 512 to limit the counterweight unit 5. The driving motor 104 drives the central screw 102 to drive several counterweight units 5 upward in sequence. When a single counterweight unit 5 moves upward, the spring 1 516 pushes the upper half of the longitudinal locking block 515 out of the lock. The fixed groove 514 leaks out from the top of the counterweight block 51, and the longitudinal locking block 515 blocks the positioning rod 522. The longitudinal locking block 515 locks the rotating drum 52 so that it cannot rotate. The rotating drum 52 is fixed in the central opening 511. When the central screw 102 rotates, the counterweight unit 5 is driven upward through the threaded sleeve 521 to assemble the counterweight. When the counterweight needs to be increased, the traction machine 2 lifts the counterweight unit 5 stacked on the connecting plate 3 upward, inserts the central screw 102 and the guide rod 103 into the threaded sleeve 521 and the guide hole 512 of the new counterweight unit 5, and starts the driving motor 104 to continue to assemble the counterweight. When the assembled counterweight unit 5 continues to assemble the counterweight, the longitudinal locking block 515 contacts the top plate 10 1 or the bottom wall of the upper counterweight unit 5 is pressed into the locking groove 1 514. At this time, the through groove 517 is flush with the positioning rod 522, and the longitudinal locking block 515 does not block the positioning rod 522. The positioning rod 522 can pass through the through groove 517. At the same time, the rotation direction of the central screw 102 is the same as the limited direction of the one-way locking block 519. The rotating drum 52 is in an active state. The rotating drum 52 of the assembled counterweight unit 5 will only follow the central screw 102 to rotate in the central opening 511, and will not cause the assembled counterweight unit 5 to move. When it is necessary to reduce the counterweight, the driving motor 104 drives the central screw 102 to reverse. When the central screw 102 reverses, it is limited by the one-way locking block 519. The rotating drum 52 cannot rotate with the central screw 102, and the central screw 102 drives the counterweight unit 5 to move downward until the counterweight unit 5 to be removed is separated from the central screw 102 and the guide rod 103, and the counterweight is removed; in use, the traction machine 2, the lead wire 4 and the connecting plate 3 can assist in disassembling the counterweight unit 5. When the counterweight needs to be increased, it is only necessary to add the counterweight unit 5 in the above manner. When the counterweight needs to be lowered, before the central screw 102 removes the counterweight unit 5, the traction machine 2 lifts the connecting plate 3 to the bottom of the driving mechanism 1 in advance, guides the counterweight unit 5, and slowly places it on the ground to prevent injuries to the operator and damage to the counterweight unit 5 caused by the impact when the counterweight unit 5 falls directly to the ground.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A combined counterweight device for engineering machinery, characterized in that: The invention comprises a driving mechanism (1) and a counterweight unit (5), wherein the driving mechanism (1) comprises a top plate (101), a central screw rod (102), a guide rod (103) and a driving motor (104), wherein the central screw rod (102) is rotatably arranged at the bottom of the top plate (101), the guide rods (103) are arranged in a circular array at the bottom of the top plate (101), the driving motor (104) is arranged at the top of the top plate (101), the output end of the driving motor (104) is transmission-connected to the central screw rod (102), and the counterweight unit (5) is inserted below the top plate (101) via the central screw rod (102) and the guide rod (103); The counterweight unit (5) comprises a counterweight block (51) and a rotating drum (52); the counterweight block (51) is provided with a central opening (511) extending therethrough, and the rotating drum (52) is rotatably clamped in the central opening (511); The rotating cylinder (52) comprises a threaded sleeve (521) and positioning rods (522); the positioning rods (522) are arranged in a circumferential array on the side wall of the threaded sleeve (521); and the threaded sleeve (521) is penetrated by a screw hole that is threadably engaged with the central screw rod (102); The side wall of the central opening (511) is provided with an annular groove (513), and the positioning rod (522) is arranged in the annular groove (513); A locking groove (514) is provided in the annular groove (513), the locking groove (514) is longitudinally arranged, the locking groove (514) penetrates the top wall of the annular groove (513), a longitudinal locking block (515) is slidably provided in the locking groove (514), a spring (516) is provided between the bottom wall of the longitudinal locking block (515) and the bottom wall of the locking groove (514), and a through groove (517) is provided on one side of the longitudinal locking block (515) close to the central opening (511); A second locking groove (518) is provided on the side wall of the annular groove (513). The second locking groove (518) is arranged transversely. A one-way locking block (519) is slidably provided in the second locking groove (518). A second spring (5110) is provided between the one-way locking block (519) and the second locking groove (518).

2. A combined counterweight device for construction machinery according to claim 1, characterized in that: The counterweight block (51) is provided with a guide hole (512) extending therethrough, and the side wall of the guide rod (103) is in contact with the inner wall of the guide hole (512).

3. A combined counterweight device for construction machinery according to claim 2, characterized in that: A traction machine (2) is provided on the top of the top plate (101), and the traction machines (2) are arranged in multiple groups. A connecting plate (3) is provided below the central screw rod (102), and a lead wire (4) is provided between the traction machine (2) and the connecting plate (3). The lead wire (4) passes through the top plate (101) to connect the traction machine (2) and the connecting plate (3).

4. A combined counterweight device for construction machinery according to claim 3, characterized in that: A connecting platform (6) is provided on the top of the top plate (101).

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