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CN-224213422-U - Counterweight assembly structure for excavator

CN224213422UCN 224213422 UCN224213422 UCN 224213422UCN-224213422-U

Abstract

The utility model discloses a counterweight assembly structure for an excavator, which belongs to the field of engineering machinery and mainly comprises a frame, wherein a counterweight body is arranged on the frame, an access hole is formed in the counterweight body, a groove is formed in the middle of the counterweight body, a fixing plate is arranged in the groove and is matched with the groove, a nut is fixed on the fixing plate, and the fixing plate is fixed on the frame through a bolt. Compared with the traditional counterweight fixing mode, the counterweight fixing device has better stability and installation convenience. Meanwhile, an overhaul port is designed in the upper middle of the counterweight, so that parts such as an oil filter and an oil-water separator of the tailless excavator can be conveniently maintained, the purpose of the counterweight is widened, and the counterweight can be matched with a frame to assemble a side door and can be provided with a scram switch.

Inventors

  • Juan Hongliang
  • ZHANG JIANYONG
  • CUI FUJUN
  • QI SHENGRAN
  • MA QIAN
  • WANG GUANGZHENG
  • Chen Zongshuai

Assignees

  • 山东临工工程机械有限公司

Dates

Publication Date
20260508
Application Date
20250226

Claims (10)

  1. 1. A counterweight assembly structure for an excavator comprises a frame (14), wherein a counterweight body (1) is arranged on the frame (14), and the counterweight assembly structure is characterized in that an access hole is formed in the counterweight body (1), a groove (16) is formed in the middle of the counterweight body (1), a fixing plate (8) is placed in the groove (16), the fixing plate (8) is in limit fit with the groove (16), a nut (9) is fixed on the fixing plate (8), and the counterweight body (1) is fixed on the frame (14) through the cooperation of the fixing plate (8) and a bolt.
  2. 2. The counterweight assembly structure for an excavator according to claim 1, wherein the fixing plate (8) comprises a limiting block (17), a nut (9) is welded on the fixing plate (8), the limiting block (17) is embedded into the groove (16), and the groove (16) limits the rotation of the fixing plate (8) through the limiting block (17).
  3. 3. The counterweight assembly structure for an excavator according to claim 2, wherein the stopper (17) has a shape similar to that of the inside of the groove, and a gap is left between the stopper (17) and the groove (16).
  4. 4. The counterweight assembly structure for an excavator according to claim 1, wherein the counterweight body (1) comprises a left counterweight body (2), a middle counterweight body (3) and a right counterweight body (4), and bottoms of the left counterweight body (2), the middle counterweight body (3) and the right counterweight body (4) are fixed on the frame (14) through bolts.
  5. 5. The counterweight assembly structure for an excavator according to claim 4, wherein the counterweight body (1) has a C-shape.
  6. 6. The counterweight assembly structure for an excavator according to claim 5, wherein the left counterweight body (2), the middle counterweight body (3) and the right counterweight body (4) are integrally formed.
  7. 7. The counterweight assembly structure for the excavator according to claim 1, wherein the end face of the access opening is provided with a rear door (5) and a rear door lock clamping plate (6), and the rear door lock clamping plates (6) are connected with the rear door (5) in a matching manner.
  8. 8. The counterweight assembly structure for an excavator according to claim 7, wherein a rear door shock absorber bracket (7) is arranged on the end face of the access opening, and a shock absorber gasket is arranged on the rear door shock absorber bracket (7) and is in fit connection with the rear door (5).
  9. 9. The counterweight assembly structure for an excavator according to claim 1, wherein the counterweight body (1) is provided with a scram switch (13).
  10. 10. The counterweight assembly structure for an excavator according to claim 1, wherein the left side and the right side of the counterweight body (1) are respectively provided with a side door (15), a side door damping bracket (12), a side door lock clamping plate (11) and a side door guide block bracket (10), and the rear door damping bracket (7), the side door lock clamping plate (11) and the side door guide block bracket (10) are connected with the side door (15) in a matched manner.

Description

Counterweight assembly structure for excavator Technical Field The utility model relates to the field of engineering machinery, in particular to a counterweight assembly structure for an excavator. Background In the field of construction machines, an excavator is an indispensable construction machine. The counterweight at the tail part is an important part in the structure of the excavator, so that the stability, the safety and the shock resistance of the excavator in various working environments are ensured. The tailless excavator can adapt to various occasions with space constraint, gradually becomes a development trend, and in order to adapt to the structure of the tailless excavator, the tailless counterweight needs to have the characteristics of small turning radius and compact structure. Because of the tailless counterweight rotary structure, personnel in the middle area have no operation space when the counterweight is installed, most tailless counterweights in the market adopt a mode of fixing the counterweights on two sides of the counterweight on a frame, and the mode is convenient to install, but has poor installation stability for large-tonnage counterweights. There are also some methods of installing bolts by embedding threaded steel blocks in the middle region of the counterweight and casting them integrally, which, although convenient to install, greatly increases the difficulty of the counterweight casting process. In addition, the functionality of tailless counter weight is single, and tailless counter weight lacks the access hole, is unfavorable for the maintenance of excavator. Disclosure of utility model The utility model aims to provide a counterweight assembly structure for an excavator, which has better stability and installation convenience compared with the traditional counterweight fixing mode. Meanwhile, an overhaul port is designed in the upper middle of the counterweight, so that parts such as an oil filter and an oil-water separator of the tailless excavator can be conveniently maintained, the purpose of the counterweight is widened, and the counterweight can be matched with a frame to assemble a side door and can be provided with a scram switch. The utility model is realized by the following technical scheme: The utility model provides a counter weight assembly structure for excavator, includes the frame, is equipped with the counterweight body on the frame, be equipped with the access hole on the counterweight body, counterweight body middle part is equipped with the recess, has placed the fixed plate in the recess, and fixed plate and recess spacing cooperation are fixed with the nut on the fixed plate, and the fixed plate passes through the bolt fastening on the frame. Further, the fixed plate comprises a limiting block, a nut is welded on the fixed plate, the limiting block is embedded into the groove, and the groove limits the fixed plate to rotate through the limiting block. Further, the limiting block is similar to the groove in shape, and gaps are reserved between two sides of the limiting block and two side walls of the groove. Further, the counterweight body comprises a left counterweight body, a middle counterweight body and a right counterweight body, and the bottoms of the left counterweight body, the middle counterweight body and the right counterweight body are fixed on the frame through bolts. Further, the counterweight body is C-shaped. Further, the left counterweight body, the middle counterweight body and the right counterweight body are integrally formed. Further, a rear door and a rear door lock clamping plate are arranged on the end face of the access hole, and the rear door lock clamping plates are connected with the rear door in a matched mode. Further, the end face of the access hole is provided with a rear door shock absorption support, the rear door shock absorption support is provided with a shock absorption gasket, and the shock absorption gasket is connected with the rear door in a matched mode. Further, the weight body is provided with an emergency stop switch. Further, the left side and the right side of the counterweight body are respectively provided with a side door, a side door damping bracket, a side door lock clamping plate and a side door guide block bracket, and the rear door damping bracket, the side door lock clamping plate and the side door guide block bracket are connected with the side door in a matched manner. Compared with the prior art, the utility model has the beneficial effects that: 1. The bottoms of the left counterweight body, the middle counterweight body and the right counterweight body are all fixed by bolts, compared with the prior art that the left counterweight body, the middle counterweight body and the right counterweight body are only fixed at two sides, the installation positions are increased, and the stability and the safety of counterweight fixation are improved. The convenience of worker assembly is considered