Hydraulic knapper with adjustable striking stroke

Abstract

The utility model relates to the technical field of breaking hammers, in particular to a hydraulic breaker with an adjustable striking stroke, which comprises a front protective plate and a rear protective plate, a rear cylinder component is arranged inside the front protective plate and the rear protective plate, a middle cylinder is arranged below the rear cylinder component, a front cylinder is mounted below the middle cylinder, and an energy accumulator is arranged on one side of the middle cylinder. The rear cylinder body assembly comprises a rear cylinder body, a telescopic rod is arranged in the rear cylinder body, a sealing plate is arranged below the telescopic rod, a nitrogen storage bin is defined between the sealing plate and the rear cylinder body, a piston mounting hole is formed in the bottom of the rear cylinder body, and an indication groove is formed in the top of the rear cylinder body. And an indication block matched with the indication groove in size is fixedly arranged at the top of the sealing plate. Through the arrangement of the rear cylinder body assembly, whether nitrogen is insufficient or not can be directly judged according to the position of the indication block, and a user can directly observe conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of breaker hammers, in particular to a hydraulic breaker with adjustable striking stroke. Background Art

[0002] A hydraulic breaker is a mechanical device that uses the hydraulic principle to perform crushing operations. Its working principle is based on the reciprocating motion of the piston driven by the static pressure of the liquid. The high-speed impact of the piston on the drill rod achieves the purpose of crushing solid materials such as ore and concrete.

[0003] The adjustment of the striking stroke of the hydraulic breaker mainly involves the adjustment of its hydraulic system. How to effectively adjust the striking stroke to achieve different striking forces and thus expand the application range of the hydraulic breaker is what the hydraulic breaker needs to solve.

[0004] The existing public technical solution, with announcement number CN208701793U, discloses a hydraulic breaker with adjustable striking stroke, including a guard plate assembly, a rear cylinder assembly, a middle cylinder assembly, a front cylinder assembly and a drill rod. By opening multiple oil drain holes on the middle cylinder, the flow of the hydraulic oil circuit is adjusted by rotating the adjusting bolt, and the length of the reciprocating stroke of the piston is changed, thereby obtaining different striking forces.

[0005] When the above technical solution is actually implemented, since the rear cylinder will be filled with nitrogen, once the nitrogen is insufficient, the impact force of the breaker will be insufficient, and the naked eye cannot judge whether the rear cylinder is filled with nitrogen. Summary of the invention

[0006] The utility model aims to provide a hydraulic breaker with adjustable striking stroke, which can directly judge whether nitrogen is insufficient through the position of an indicator block, so as to facilitate direct observation by users and solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the utility model provides the following technical solution: a hydraulic breaker with adjustable striking stroke, comprising front and rear guard plates, a rear cylinder assembly is arranged inside the front and rear guard plates, a middle cylinder is arranged below the rear cylinder assembly, a front cylinder is installed below the middle cylinder, and an accumulator is arranged on one side of the middle cylinder;

[0008] The rear cylinder assembly includes a rear cylinder body, and a telescopic rod is arranged inside the rear cylinder body, a sealing plate is arranged below the telescopic rod, and the sealing plate and the rear cylinder body are enclosed to form a nitrogen storage bin, a piston mounting hole is provided at the bottom of the rear cylinder body, an indicator groove is provided at the top of the rear cylinder body, and an indicator block matching the size of the indicator groove is fixedly provided on the top of the sealing plate.

[0009] Preferably, a drill rod body is installed inside the front cylinder body, and a limit groove is provided on the surface of the drill rod body, and a limit block is provided at the connection between the limit groove and the front cylinder body.

[0010] Preferably, the telescopic rod comprises a sleeve, a sleeve rod sleeved inside the sleeve, and a return spring arranged between the sleeve and the sleeve rod. The sleeve is sleeved with the sleeve rod, and two ends of the return spring are respectively connected to the sleeve and the sleeve rod.

[0011] Preferably, the sleeve in the telescopic rod is elastically connected to the sleeve rod via a return spring, and both ends of the telescopic rod are respectively connected to the rear cylinder body and the sealing plate.

[0012] Preferably, a guide slot is provided at the connection between the sealing plate and the rear cylinder body, and a guide slide block is provided inside the guide slot, and the guide slide block is fixed on the sealing plate.

[0013] Preferably, the sealing plate is lifted and lowered in the rear cylinder body through a guide slot and a guide slider, and the telescopic rod is located at the top four corners of the sealing plate.

[0014] Preferably, a piston rod is provided above the drill rod body, and the piston rod is installed inside the middle cylinder body, and a sealing ring is provided at the connection between the piston rod and the middle cylinder body.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. Through the rear cylinder assembly, when nitrogen is filled into the nitrogen storage bin, the sealing plate is squeezed upward. When the nitrogen is full, the indicator block moves upward into the indicator groove. The indicator block can be directly observed from the surface of the rear cylinder body. The height of the indicator block can be used to judge whether the nitrogen is fully filled, which is convenient for the user to visually judge whether the nitrogen is filled enough.

[0017] 2. The provided guide groove and guide slider can guide the movement of the sealing plate, making the movement of the sealing plate more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is the overall structural view of the utility model;

[0020] Figure 2It is a structural schematic diagram of the drill rod body and the piston rod of the utility model;

[0021] Figure 3 It is a half-section structural schematic diagram of the rear cylinder body of the utility model;

[0022] Figure 4 For the utility model Figure 3 A is an enlarged view of the middle image.

[0023] Description of reference numerals:

[0024] 1. Front and rear guard plates; 2. Drill rod body; 3. Front cylinder body; 4. Middle cylinder body; 5. Rear cylinder body assembly; 501. Rear cylinder body; 502. Telescopic rod; 503. Indicator groove; 504. Sealing plate; 505. Indicator block; 506. Nitrogen storage bin; 507. Piston mounting hole; 508. Guide slide groove; 509. Guide slide block; 6. Accumulator; 7. Piston rod; 8. Sealing ring; 9. Limiting groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides a technical solution:

[0027] See also Figures 1 to 4 A hydraulic breaker with adjustable striking stroke comprises front and rear guard plates 1, a rear cylinder assembly 5 is arranged inside the front and rear guard plates 1, a middle cylinder 4 is arranged below the rear cylinder assembly 5, a front cylinder 3 is installed below the middle cylinder 4, and an accumulator 6 is arranged on one side of the middle cylinder 4;

[0028] The rear cylinder assembly 5 includes a rear cylinder body 501, and a telescopic rod 502 is arranged inside the rear cylinder body 501, a sealing plate 504 is arranged below the telescopic rod 502, and the sealing plate 504 and the rear cylinder body 501 are enclosed to form a nitrogen storage bin 506, a piston mounting hole 507 is provided at the bottom of the rear cylinder body 501, an indicator groove 503 is provided at the top of the rear cylinder body 501, and an indicator block 505 whose size matches the indicator groove 503 is fixedly provided on the top of the sealing plate 504.

[0029] By adopting the above technical solution, nitrogen is filled into the interior of the nitrogen storage bin 506, and sealing members are arranged around the sealing plate 504 and between the rear cylinder body 501 to seal the sealing plate 504 to prevent nitrogen from leaking between the sealing plate 504 and the rear cylinder body 501. As the nitrogen is filled, the sealing plate 504 can be squeezed upward to allow the telescopic rod 502 to be extended and retracted. When the nitrogen is full, the indicator block 505 can move upward into the indicator groove 503. The indicator block 505 can be directly observed from the surface of the rear cylinder body 501, thereby judging that the nitrogen is fully filled. If the indicator block 505 does not completely protrude from the indicator groove 503, it means that the nitrogen is insufficient and nitrogen needs to be supplemented immediately, otherwise it will affect the normal use of the hydraulic breaker. A regulating valve is also arranged on the middle cylinder body 4 of the hydraulic breaker to adjust the flow of hydraulic oil and thus adjust the striking stroke.

[0030] Specifically, Figure 2 and Figure 3 As shown, a drill rod body 2 is installed inside the front cylinder body 3, and a limit groove 9 is provided on the surface of the drill rod body 2, and a limit block is provided at the connection between the limit groove 9 and the front cylinder body 3, a piston rod 7 is provided above the drill rod body 2, and the piston rod 7 is installed inside the middle cylinder body 4, and a sealing ring 8 is provided at the connection between the piston rod 7 and the middle cylinder body 4;

[0031] The telescopic rod 502 includes a sleeve, a sleeve rod sleeved inside the sleeve, and a return spring arranged between the sleeve and the sleeve rod. The sleeve is sleeved with the sleeve rod, and the two ends of the return spring are respectively connected to the sleeve and the sleeve rod. The sleeve inside the telescopic rod 502 is elastically connected to the sleeve rod through the return spring, and the two ends of the telescopic rod 502 are respectively connected to the rear cylinder body 501 and the sealing plate 504. A guide groove 508 is provided at the connection between the sealing plate 504 and the rear cylinder body 501, and a guide slider 509 is provided inside the guide groove 508. The guide slider 509 is fixed on the sealing plate 504. The sealing plate 504 is lifted and lowered in the rear cylinder body 501 through the guide groove 508 and the guide slider 509. The telescopic rod 502 is located at the top four corners of the sealing plate 504.

[0032] By adopting the above technical solution, when the piston rod 7 moves in the middle cylinder body 4, it can drive the drill rod body 2 to move. When the drill rod body 2 moves, the limit groove 9 slides on the limit block to guide the drill rod body 2.

[0033] When the sealing plate 504 moves upward, it can drive the sleeve to move upward, so that the sleeve rod is retracted into the interior of the sleeve, and the return spring is compressed. When the nitrogen is insufficient, the sleeve rod is pushed to stretch under the action of the return spring, and the sealing plate 504 moves downward, so that the indicating block 505 does not completely protrude from the indicating groove 503.

[0034] Working principle: when the piston rod 7 moves in the middle cylinder body 4, it can drive the drill rod body 2 to move. When the drill rod body 2 moves, the limit groove 9 slides on the limit block to guide the drill rod body 2. Nitrogen is filled into the nitrogen storage bin 506. As the nitrogen is filled, the sealing plate 504 can be squeezed upward to make the telescopic rod 502 telescopic. When the nitrogen is full, the indicator block 505 can move upward into the indicator groove 503. The indicator block 505 can be directly observed from the surface of the rear cylinder body 501, so that it can be judged that the nitrogen is fully filled. When the nitrogen is insufficient, the sleeve rod is pushed to stretch under the action of the reset spring, and the sealing plate 504 moves downward, so that the indicator block 505 does not completely protrude from the indicator groove 503, indicating that the nitrogen is insufficient. Nitrogen needs to be supplemented immediately, otherwise it will affect the normal use of the hydraulic breaker. A regulating valve is also provided on the middle cylinder body 4 of the hydraulic breaker to adjust the flow of hydraulic oil, thereby adjusting the striking stroke.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A hydraulic breaker with adjustable striking stroke, comprising front and rear guard plates (1), characterized in that: A rear cylinder assembly (5) is arranged inside the front and rear guard plates (1), a middle cylinder (4) is arranged below the rear cylinder assembly (5), a front cylinder (3) is installed below the middle cylinder (4), and an accumulator (6) is arranged on one side of the middle cylinder (4); The rear cylinder assembly (5) comprises a rear cylinder body (501), wherein a telescopic rod (502) is arranged inside the rear cylinder body (501), a sealing plate (504) is arranged below the telescopic rod (502), and a nitrogen storage bin (506) is formed between the sealing plate (504) and the rear cylinder body (501), a piston mounting hole (507) is provided at the bottom of the rear cylinder body (501), an indicating groove (503) is provided at the top of the rear cylinder body (501), and an indicating block (505) having a size matching that of the indicating groove (503) is fixedly arranged at the top of the sealing plate (504).

2. A hydraulic breaker with adjustable striking stroke according to claim 1, characterized in that: A drill rod body (2) is installed inside the front cylinder body (3), and a limit groove (9) is provided on the surface of the drill rod body (2), and a limit block is provided at the connection between the limit groove (9) and the front cylinder body (3).

3. The hydraulic breaker with adjustable striking stroke according to claim 1, characterized in that: The telescopic rod (502) comprises a sleeve, a sleeve rod sleeved inside the sleeve, and a return spring arranged between the sleeve and the sleeve rod; the sleeve is sleeved with the sleeve rod, and two ends of the return spring are respectively connected to the sleeve and the sleeve rod.

4. A hydraulic breaker with adjustable striking stroke according to claim 3, characterized in that: The sleeve in the telescopic rod (502) is elastically connected to the sleeve rod via a return spring, and the two ends of the telescopic rod (502) are respectively connected to the rear cylinder body (501) and the sealing plate (504).

5. The hydraulic breaker with adjustable striking stroke according to claim 4, characterized in that: A guide slide groove (508) is provided at the connection between the sealing plate (504) and the rear cylinder body (501), and a guide slider (509) is provided inside the guide slide groove (508), and the guide slider (509) is fixed on the sealing plate (504).

6. A hydraulic breaker with adjustable striking stroke according to claim 5, characterized in that: The sealing plate (504) is lifted and lowered in the rear cylinder body (501) via a guide slot (508) and a guide slider (509), and the telescopic rod (502) is located at the top four corners of the sealing plate (504).

7. The hydraulic breaker with adjustable striking stroke according to claim 2, characterized in that: A piston rod (7) is arranged above the drill rod body (2), and the piston rod (7) is installed inside the middle cylinder body (4). A sealing ring (8) is arranged at the connection between the piston rod (7) and the middle cylinder body (4).

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