Self-adaptive counterweight adjusting device and excavator comprising same

Abstract

The utility model provides a self-adaptive balance weight adjusting device (2) and an excavator (1) comprising the balance weight adjusting device (2). The self-adaptive balance weight adjusting device (2) comprises one or more balance weight units (20). The adjusting unit (21) is mounted on the excavator (1), connected with the one or more counterweight units (20) and used for driving the one or more counterweight units (20) to reciprocate in the preset direction to adjust the gravity center of the excavator (1). According to the counterweight adjusting device (2), the position of the counterweight unit (20) can be changed in real time through the adjusting unit (21) according to the construction requirement of the excavator (1), so that the gravity center of the excavator (1) is adjusted in real time, and the operation stability of the excavator (1) is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of excavator counterweight structure, and more particularly to an adaptive counterweight adjusting device and an excavator comprising the same. BACKGROUND

[0002] An excavator vibrator is a device widely used in civil engineering, road construction and building engineering, mainly used for concrete vibration, soil compaction and other construction scenes that require vibration to improve density; in actual operation, the vibrator is usually used in cooperation with the excavator, and the vibration energy is provided by the hydraulic power or other driving devices of the excavator, and then the vibrator transmits the vibration energy to the target material, thereby improving its density and strength.

[0003] At present, in the vibration operation, the counterweight structure is an important influencing factor for adjusting the balance performance of the vibrator, which directly determines the stability of the excavator. However, in the existing design of the vibrator counterweight, a fixed counterweight block is usually used, which cannot be adjusted in real time according to the actual operation environment or equipment load demand, and is easy to cause uneven load to the excavator host, leading to the overturning or instability of the equipment, affecting the operation safety. CONTENT OF THE UTILITY MODEL

[0004] The present application provides an adaptive counterweight adjusting device and an excavator comprising the same, which can change the position of the counterweight unit in real time by using the adjusting unit according to the construction demand of the excavator, so as to adjust the center of gravity of the excavator in real time and improve the stability of the excavator operation.

[0005] In a first aspect, the present application provides an adaptive counterweight adjusting device, comprising: one or more counterweight units; an adjusting unit installed on the excavator and connected with the one or more counterweight units, for driving the one or more counterweight units to reciprocate along a preset direction to adjust the center of gravity of the excavator.

[0006] In an optional solution of the first aspect, the one or more counterweight units comprise one or more counterweight blocks, and the one or more counterweight blocks are connected with the driving end of the adjusting unit.

[0007] In an optional solution of the first aspect, the plurality of counterweight units are arranged in an array along the width or length direction of the excavator.

[0008] In an optional solution of the first aspect, the plurality of counterweight units comprise one or more counterweight blocks, and the one or more counterweight blocks are connected with the driving end of the adjusting unit.

[0009] In an optional solution of the first aspect, the plurality of counterweight blocks are arranged in an array along the width or length direction of the excavator.

[0010] In an alternative of the first aspect, the adjusting unit comprises: a transmission member connected with the one or more weight units; a driving member connected with the transmission member for driving the transmission member to drive the one or more weight units to reciprocate along the preset direction.

[0011] In an alternative of the first aspect, the transmission member comprises: a fixed seat mounted on the excavator; a lead screw connected with the fixed seat; a ball nut seat sleeved on the lead screw and reciprocating along the axial direction of the lead screw, the ball nut seat being connected with the one or more weight units.

[0012] In an alternative of the first aspect, the driving member is a hydraulic motor or a servo motor, the hydraulic motor or the servo motor being connected with the lead screw for driving the lead screw to drive the ball nut seat to reciprocate.

[0013] In an alternative of the first aspect, further comprising: a mounting seat mounted on the excavator; wherein the adjusting unit and the one or more weight units are mounted on the mounting seat.

[0014] In the second aspect, the present application provides an excavator comprising the self-adaptive weight adjusting device.

[0015] It should be understood that the general description above and the following detailed description are only exemplary and do not limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate one or more embodiments of the present application and, together with the description, explain the principles of the present application and enable a person ordinarily skilled in the relevant art to make and use the present application.

[0017] Figure 1 is a first structural schematic diagram of an exemplary excavator comprising a weight adjusting device according to some embodiments of the present application.

[0018] Figure 2 is a second structural schematic diagram of an exemplary excavator comprising a weight adjusting device according to some embodiments of the present application.

[0019] Figure 3 is a structural schematic diagram of an exemplary single weight unit single weight block according to some embodiments of the present application.

[0020] Figure 4 is a reciprocating motion schematic diagram of an exemplary single weight unit single weight block according to some embodiments of the present application.

[0021] Figure 5is an exemplary single-weight unit multiple-weight block structural diagram according to some embodiments of the present application.

[0022] Figure 6 is an exemplary single-weight unit multiple-weight block reciprocating motion diagram according to some embodiments of the present application.

[0023] Figure 7 is an exemplary multiple-weight unit single-weight block structural diagram according to some embodiments of the present application.

[0024] Figure 8 is an exemplary multiple-weight unit multiple-weight block structural diagram according to some embodiments of the present application.

[0025] Figure 9 is an exemplary multiple-weight unit multiple-weight block reciprocating motion diagram according to some embodiments of the present application. DETAILED DESCRIPTION

[0026] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can be implemented in any

[0027] First, the present application briefly introduces the vibrator 3 of the excavator 1.

[0028] The vibrator 3 of the excavator 1 is a construction equipment used for concrete vibration, soil compaction, foundation backfilling or other construction requiring improvement of compactness through vibration, which is powered by the hydraulic system of the excavator 1, and makes the material compact, reduces air bubbles and improves construction quality and efficiency through high-frequency vibration, and is widely used in the fields of civil engineering, road construction and building engineering.

[0029] The vibrator 3 typically includes the vibrator body, vibration source, hydraulic drive mechanism, connecting mechanism, and anti-vibration bracket. The vibrator body is usually made of alloy steel or high-strength wear-resistant material, with impact and corrosion resistance. The length and diameter of the vibrator body are selected by the operator according to the construction requirements. The vibration source usually has a built-in vibration mechanism (such as an eccentric shaft or eccentric block) that generates vibration force through hydraulic drive. The hydraulic drive mechanism is connected to the hydraulic system of the excavator 1 and provides high-pressure oil through a hydraulic pump to drive the vibration source. The connecting mechanism connects the vibrator 3 to the stick of the excavator 1 using a connecting bracket. The anti-vibration bracket is used to reduce the amplitude of vibration transmitted to the excavator 1, protecting the equipment and operators.

[0030] Therefore, the working principle of the vibrator 3 is as follows: the vibrator 3 is driven by the hydraulic system of the excavator 1 to drive the eccentric shaft or eccentric block of the vibration source to rotate or reciprocate at high speed, generating high-frequency vibration force. Then, the vibration force is transmitted to the target area (such as concrete or soil) through the vibrator 3 to achieve the compaction and densification of the material. The operator controls the movement path and angle of the vibrator 3 through the excavator 1 to ensure that the vibration effect covers the construction area.

[0031] Currently, when excavator 1 operates vibrator 3, the center of gravity of the whole machine will change. Usually, a fixed counterweight 200 is used to balance the center of gravity of excavator 1 and reduce the risk of excavator 1 overturning during operation. However, at present, it is usually used in different types of soil, concrete or steep slope construction conditions. When using a fixed counterweight, it is difficult to adjust the position of the counterweight according to the real-time working conditions.

[0032] Therefore, for reference Figure 1 , Figure 2 As shown, Figure 1 This illustration shows a first structural schematic diagram of an exemplary excavator including a counterweight adjustment device, according to some embodiments of this application. Figure 2 A schematic diagram of the second structure of an excavator including a counterweight adjustment device, according to some embodiments of this application, is shown.

[0033] This application relates to an adaptive counterweight adjustment device 2 for an excavator 1, which includes one or more counterweight units 20 and an adjustment unit 21. The adjustment unit 21 is mounted on the excavator 1 and connected to one or more counterweight units 20, and is used to drive one or more counterweight units 20 to reciprocate along a preset direction to adjust the center of gravity of the excavator 1.

[0034] Specifically, the one or more weight units 20 adopt a weight block 200, which adopts a structure including but not limited to cast iron, steel material welded structure filled with concrete or metal, etc., to adjust the center of gravity of the excavator 1 device to a stable position; the adjusting unit 21 is installed on the main body of the excavator 1, and the adjusting unit 21 can be any form of driving structure as long as it can drive the one or more weight units 20 to reciprocate along the preset direction, including but not limited to hydraulic mechanism, pneumatic mechanism, motor mechanism driving screw 210-2, cam, etc. to provide driving force for reciprocating linear motion, and the specific setting is performed by the operator according to the actual demand. In this application, the adjusting unit 21 refers to a linear driving mechanism formed by a hydraulic motor or a servo motor cooperating with a fixed seat 210-1, a screw 210-2 and a ball nut seat 210-3; wherein the preset direction can be the X-axis direction or the Y-axis direction, and the specific setting is performed by the operator according to the actual demand.

[0035] Reference Figure 3 As shown, Figure 3 An exemplary structure schematic diagram of a single weight unit single weight block of some embodiments of the present application is shown. In some examples of the present application, the adjusting unit 21 includes a transmission member 210 and a driving member 211, the transmission member 210 is connected with the one or more weight units 20, and the driving member 211 is connected with the transmission member 210, for driving the transmission member 210 to drive the one or more weight units 20 to reciprocate along the preset direction.

[0036] Specifically, the transmission member 210 includes a fixed seat 210-1, a screw 210-2 and a ball nut seat 210-3, the fixed seat 210-1 is provided at least two, respectively arranged at both ends of the main body of the excavator 1, and exemplarily, the fixed seat 210-1 refers to a fixed seat I 210-1a and a fixed seat II 210-1b; one end of the screw 210-2 passes through the fixed seat II 210-1b and is connected with the fixed seat I 210-1a, to provide guiding and driving force for the ball nut seat 210-3; the ball nut seat 210-3 is sleeved on the screw 210-2 and connected with the one or more weight units 20, to drive the one or more weight units 20 to reciprocate along the axial direction of the screw 210-2; the driving member 211 adopts a hydraulic motor or a servo motor, which is connected with the end of the screw 210-2 not passing through the fixed seat II 210-1b, and the hydraulic motor or the servo motor is used to drive the screw 210-2 to drive the ball nut seat 210-3 to reciprocate.

[0037] Therefore, the working principle of the self-adaptive weight adjusting device 2 of the present application is as follows:

[0038] When the boom and stick of the excavator 1 are extended, the driving member 211 drives the ball screw 210-2 to move the ball nut seat 210-3 in the direction opposite to the cab of the excavator 1, and simultaneously drives the one or more counterweight units 20 connected thereto to move synchronously, so as to move the center of gravity of the excavator 1 backward, thereby optimizing the distribution of the center of gravity of the excavator 1 and reducing the risk of rollover or overturning; when the vibrator 3 of the excavator 1 is pressed downward to the working position, the counterweight needs to be lowered, the driving member 211 drives the ball screw 210-2 to move the ball nut seat 210-3 in the direction of the cab of the excavator 1, and simultaneously drives the one or more counterweight units 20 connected thereto to move synchronously, so as to adjust and lower the counterweight, and by flexibly adjusting the position of the counterweight unit 20, the different task requirements (such as light load and heavy load operation) can be adapted.

[0039] Referring to Figure 3 In some embodiments of the present application, a mounting seat 22 is further included, which is mounted on the main body of the excavator 1, and the adjusting unit 21 and the one or more counterweight units 20 are mounted on the mounting seat 22.

[0040] Specifically, the mounting seat 22 is made of high-strength alloy steel and is designed with multiple standardized interfaces on the mounting seat 22, which are respectively connected with the main body of the excavator 1 and the adjusting unit 21, and can be fixed with the main body of the excavator 1 by a multi-point connection mode of bolt fasteners; through the setting of the mounting seat 22, excavators 1 of different models and construction requirements can be adapted, that is, the adjusting unit 21 and the one or more counterweight units 20 can be quickly replaced according to actual requirements, and a detachable design is adopted, which is convenient to disassemble and assemble and has low maintenance cost.

[0041] Referring to Figures 3-9 In some embodiments of the present application, the one or more counterweight units 20 include one or more counterweight blocks 200, that is, a single counterweight unit 20 can be provided with a single counterweight block 200, or a single counterweight unit 20 can be provided with multiple counterweight blocks 200; multiple counterweight units 20 can be all provided with a single counterweight block 200, or multiple counterweight units 20 can be all provided with multiple counterweight blocks 200, or multiple counterweight units 20 can be partially provided with a single counterweight block 200 or multiple counterweight blocks 200.

[0042] Specifically, if multiple counterweight units 20 are provided, the multiple counterweight units 20 are arranged in an array along the width or length direction of the excavator 1; if a single counterweight unit 20 is provided and multiple counterweight blocks 200 are provided, the multiple counterweight blocks 200 are arranged in an array along the width or length direction of the excavator 1.

[0043] Therefore, as shown in Figure 3 and Figure 4 ,Figure 4 An exemplary reciprocating motion schematic diagram of a single counterweight unit single counterweight block is shown for some embodiments of the present application. In some embodiments of the present application, a single counterweight unit 20 is provided and a single counterweight block 200 is provided for the single counterweight unit 20, which is light in weight and fast in response speed, so as to be applicable to a working condition with small load or low balance requirement of the working environment.

[0044] Specifically, the single counterweight block 200 is provided and the material of the counterweight block 200 is made of alloy steel or cast iron, and the counterweight block 200 is designed as a standardized rectangular block, so as to facilitate loading, unloading and positioning. In actual implementation, the counterweight block 200 provided in this way is light in weight, the inertia of the adjusting unit 21 is small when driven, the response speed is fast, and the frequent dynamic adjustment requirement of the gravity center can be met.

[0045] Referring to Figure 5 and Figure 6 , it is shown that Figure 5 An exemplary structure schematic diagram of a single counterweight unit multiple counterweight blocks is shown for some embodiments of the present application, Figure 6 An exemplary reciprocating motion schematic diagram of a single counterweight unit multiple counterweight blocks is shown for some embodiments of the present application. In some embodiments of the present application, a single counterweight unit 20 is provided and multiple counterweight blocks 200 are provided for the single counterweight unit 20, so as to increase the weight of the single counterweight unit 20 through the multiple counterweight blocks 200, so as to be applicable to a high load working condition.

[0046] Specifically, when the multiple counterweight blocks 200 are provided, each counterweight block 200 is designed as a standardized rectangular shape and the weight of each counterweight block 200 is unified; when the multiple counterweight blocks 200 are installed, the multiple counterweight blocks 200 can be installed and fixed one by one along the height direction or the length direction. In actual implementation, after the multiple counterweight blocks are installed, the weight of the single counterweight unit 20 can be increased, and high weight balance can be provided, that is, when working on a steep slope or uneven ground or working at a long distance using a long boom, the position of the multiple counterweight blocks 200 is adjusted to avoid overturning of the equipment.

[0047] For example, a single counterweight unit 20 is provided and a counterweight block I 200a and a counterweight block II 200b are provided for the counterweight unit 20, and then the counterweight unit 20 is connected with the ball nut seat 210-3.

[0048] Referring to Figure 7 and Figure 7An exemplary structure diagram of a single weight block of a plurality of weight units is shown for applying some embodiments. In some embodiments of the present application, a plurality of weight units 20 are provided and a single weight block 200 is provided for all of the plurality of weight units 20. The plurality of weight units 20 can be arranged in an array along the width or length direction of the excavator 1 to be suitable for the operation scenario of balanced distribution of weight demand.

[0049] Specifically, when the weight blocks 200 of the plurality of weight units 20 are provided, each weight block 200 can be designed as a standardized rectangular shape and each weight block 200 can be uniformly weighted. Each weight unit 20 can be equipped with an independent adjustment unit 21, or all of the weight units 20 can be equipped with a unified adjustment unit 21. In actual implementation, this setting mode is suitable for the operation of the excavator 1 in the load balanced distribution, uneven terrain operation, or operation requiring frequent movement or rotation. Through the flexible adjustment of the plurality of weight units 20, the working condition can be quickly adapted, and the safety of the equipment can be improved.

[0050] For example, the weight unit I 20a is provided and the weight block I 200a is configured for the weight unit I 20a, and then the weight unit I 20a is connected to the ball nut seat 210-3 of the adjustment unit I 21a. The weight unit II 20b is provided and the weight block II 200b is configured for the weight unit II 20b, and then the weight unit II 20b is connected to the ball nut seat 210-3 of the adjustment unit II 21b.

[0051] Referring to Figure 8 and Figure 9 shown, Figure 8 An exemplary structure diagram of a plurality of weight blocks of a plurality of weight units is shown for applying some embodiments of the present application, Figure 9 An exemplary reciprocating motion diagram of a plurality of weight blocks of a plurality of weight units is shown for applying some embodiments of the present application. In some embodiments of the present application, a plurality of weight units 20 are provided and a plurality of weight blocks 200 are provided for all of the plurality of weight units 20 to provide higher balancing capability and be suitable for high-load and complex terrain operation.

[0052] Specifically, when multiple counterweight units 20 are equipped with multiple counterweight blocks 200, each counterweight block 200 can be designed in a standardized rectangular shape and have a uniform weight, and then each counterweight unit 20 is equipped with a corresponding number of counterweight blocks 200 matching the weight according to actual construction requirements, and each counterweight unit 20 needs to be equipped with an independent adjusting unit 21. In actual implementation, this setting mode is suitable for deep or long-distance operation, slope operation or overweight operation, that is, in deep or long-distance or overweight operation, the load of the front part of the excavator 1 increases significantly, and multiple counterweight units 20 are needed to carry heavier counterweight blocks 200 to the rear of the excavator 1 to maintain the stability of the center of gravity; in steep slope operation, multiple counterweight units 20 are needed to move to adjust the center of gravity to the high side of the excavator 1 to prevent the excavator 1 from rolling over.

[0053] For example, counterweight unit I 20a is set and counterweight block I 200a is configured for counterweight unit I 20a, counterweight unit II 20b is set and counterweight block II 200b is configured for counterweight unit II 20b, and then counterweight unit I 20a and counterweight unit II 20b are connected with the ball nut seat 210-3 of adjusting unit I 21a; counterweight unit III 20c is set and counterweight block III 200c is configured for counterweight unit III 20c, counterweight unit IV 20d is set and counterweight block IV 200d is configured for counterweight unit IV 20d, and then counterweight unit III 20c and counterweight unit IV 20d are connected with the ball nut seat 210-3 of adjusting unit II 21b.

[0054] In some embodiments of the present application, multiple counterweight units 20 are set and some of the multiple counterweight units 20 are provided with a single counterweight block 200 and some of the multiple counterweight units 20 are provided with multiple counterweight blocks 200, so as to be flexibly combined according to the operation requirements, that is, a part of the counterweight units 20 are provided with a single counterweight block 200 to provide fine adjustment, and another part of the counterweight units 20 are provided with multiple counterweight blocks 200 to increase the total counterweight capacity.

[0055] Specifically, when multiple counterweight units 20 are equipped with a single counterweight block 200 and multiple counterweight blocks 200, each counterweight block 200 can be designed in a standardized rectangular shape and have a uniform weight, and then each counterweight unit 20 is equipped with a corresponding number of counterweight blocks 200 matching the weight according to actual construction requirements, and each counterweight unit 20 needs to be equipped with an independent adjusting unit 21.

[0056] In actual implementation, by assigning a single weight block 200 to each of the plurality of weight units 20, the center of gravity of the excavator 1 can be finely adjusted during operation, for example, when the excavator 1 is performing delicate positioning or low-load operation, moving these weight units 20 provides a small change in the center of gravity; by assigning a plurality of weight blocks 200 to each of the plurality of weight units 20, the total weight capacity of the excavator 1 can be significantly improved, for example, when performing high-load or long-distance operation, moving these weight units 20 to move the center of gravity backward provides additional stability; by flexible combination of the weight units 20, both fine adjustment and high-load requirements can be considered to improve the adaptability of the excavator 1 to the operation scene.

[0057] Therefore, the application also relates to an excavator 1 comprising the adaptive weight adjustment device 2 of any of the above embodiments.

[0058] The above merely illustrates the specific embodiments of the application, but the protection scope of the application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the application, which should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

[0059] Legend of reference signs:

[0060] 1 excavator

[0061] 2 weight adjustment device

[0062] 3 vibrator

[0063] 20 weight unit

[0064] 20a weight unit I

[0065] 20b weight unit II

[0066] 20c weight unit III

[0067] 20d weight unit IV

[0068] 21 adjustment unit

[0069] 21a adjustment unit I

[0070] 21b adjustment unit II

[0071] 22 mounting seat

[0072] 200 weight block

[0073] 200a weight block I

[0074] 200b weight block II

[0075] 200c counterweight III

[0076] 200d counterweight IV

[0077] 210 transmission member

[0078] 211 drive member

[0079] 210-1 fixed seat

[0080] 210-1a fixed seat I

[0081] 210-1b fixed seat II

[0082] 210-2 screw rod

[0083] 210-3 ball nut seat

Claims

1. An adaptive counterweight adjustment device (2), characterized in that, The device comprises: one or more weight units (20); an adjusting unit (21) installed on the excavator (1) and connected with the one or more weight units (20), for driving the one or more weight units (20) to reciprocate along a preset direction to adjust the center of gravity of the excavator (1).

2. Counterweight adjustment device (2) according to claim 1, characterized in that The one or more weight units (20) comprise one or more weight blocks (200) connected with the driving end of the adjusting unit (21).

3. Counterweight adjustment device (2) according to claim 1 or 2, characterized in that The plurality of weight units (20) are arranged in an array along the width direction of the excavator (1).

4. Counterweight adjustment device (2) according to claim 3, characterized in that The plurality of weight units (20) comprise one or more weight blocks (200) connected with the driving end of the adjusting unit (21).

5. Counterweight adjustment device (2) according to claim 4, characterized in that The plurality of weight blocks (200) are arranged in an array along the width direction of the excavator (1).

6. Counterweight adjustment device (2) according to claim 1 or 5, characterized in that The adjusting unit (21) comprises: a transmission member (210) connected with the one or more weight units (20); a driving member (211) connected with the transmission member (210), for driving the transmission member (210) to drive the one or more weight units (20) to reciprocate along a preset direction.

7. Counterweight adjustment device (2) according to claim 6, characterized in that The transmission member (210) comprises: a fixed seat (210-1) installed on the excavator (1); a lead screw (210-2) connected with the fixed seat (210-1); a ball nut seat (210-3) sleeved on the lead screw (210-2) and reciprocating along the axial direction of the lead screw (210-2), the ball nut seat (210-3) being connected with the one or more weight units (20).

8. Counterweight adjustment device (2) according to claim 7, characterized in that The driving member (211) is a hydraulic motor or a servo motor connected with the lead screw (210-2), for driving the lead screw (210-2) to drive the ball nut seat (210-3) to reciprocate.

9. Counterweight adjusting device (2) according to claim 1 or 5 or 8, characterized in that Further comprising: a mounting seat (22) installed on the excavator (1); wherein the adjusting unit (21) and the one or more weight units (20) are installed on the mounting seat (22).

10. An excavator (1) comprising the weight adjusting device according to any one of claims 1-9.

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