Quartering hammer
By setting up a buffer groove and step surface in the crusher cylinder, and increasing the pressure by changing the piston boss and buffer cavity space, the working stopping problem caused by the hydraulic crusher entering the buffer groove is solved, and the working stability and efficiency are improved.
Patent Information
- Application Number
- CN202422122897.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-29
AI Technical Summary
After the existing hydraulic breaker enters the buffer groove at the lower end of the piston, high-pressure oil cannot enter, resulting in a stop in operation and affecting working efficiency.
A buffer groove and step surface are provided in the cylinder body, and a boss is provided on the piston. The pressure is increased by changing the buffer cavity space, ensuring that the oil pressure of the normal high-pressure chamber always acts on the step surface, achieving stable movement of the piston.
Improves the working stability and efficiency of the breaker, ensuring that the piston can be re-pressed and moves backward when in the limit position, maintaining continuous operation.
Smart Images
Figure CN223074816U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of breaker hammers, and particularly relates to a breaker hammer. Background Art
[0002] When a hydraulic breaker hammer can break rocks, due to the impact force of the piston or the nitrogen pressure in the rear cylinder block, the drill rod is pressed out. At this time, the piston abuts against the front cylinder block. At this time, the lower end of the piston enters the buffer groove at the lower end of the middle cylinder block, resulting in the high-pressure oil at the lower end of the piston being unable to enter, and the hydraulic breaker hammer stops working. To make the hydraulic breaker hammer work again, the excavator needs to press the lower end of the drill rod against the object to be broken, push the drill rod and the piston back to their original positions, and connect the lower end of the piston with the high-pressure oil chamber of the middle cylinder block. At this time, the excavator operator starts the excavator by stepping on the pedal, and the hydraulic breaker hammer will respond. The existing structure of the hydraulic breaker hammer seriously affects the working efficiency of the hydraulic breaker hammer. Summary of the Invention
[0003] The purpose of the utility model is to provide a breaker hammer in view of the above problems existing in the prior art. The technical problem to be solved by the utility model is: how to ensure the stability of the working efficiency of the breaker hammer.
[0004] The purpose of the utility model can be achieved by the following technical solutions:
[0005] A breaker hammer, including a cylinder block, a piston capable of reciprocating movement is arranged in the cylinder block, and a constant high-pressure chamber is arranged in the cylinder block. It is characterized in that the piston has a stepped surface facing the front of the cylinder block, the stepped surface is adapted to receive the pressure in the constant high-pressure chamber, a buffer groove is further opened in the cylinder block behind the constant high-pressure chamber, the buffer groove has a first front groove wall facing the rear of the cylinder block, a convex platform is arranged on the piston, and a buffer chamber is defined between the front end surface of the convex platform and the first front groove wall. When the piston reciprocates, the space of the buffer chamber becomes larger or smaller. When the piston moves forward to the limit position, the stepped surface is always located in the constant high-pressure chamber.
[0006] When the piston moves forward towards the front of the cylinder block, the distance between the first front groove wall and the front end surface of the convex platform changes, which causes the space of the buffer chamber to become smaller. When the space of the buffer chamber becomes smaller, the internal pressure increases to increase the buffer force of the piston. When the piston moves forward to the limit position, the stepped surface is always located in the constant high-pressure chamber. Thus, it can be ensured that when the piston needs to change the moving direction, the oil pressure in the constant high-pressure chamber can always act on the stepped surface, so that when the piston moves forward to the limit position, it can be ensured that it can be re-loaded and move backward, ensuring the working stability and working efficiency of the breaker hammer.
[0007] In the above-mentioned breaker, the buffer groove includes a first side groove wall and a second side groove wall. The first side groove wall is connected to the first front groove wall. The second side groove wall is located behind the first side groove wall. The inner diameter of the first side groove wall is larger than that of the second side groove wall.
[0008] In the above-mentioned breaker, the first front groove wall is inclined, and the included angle between the first front groove wall and the first side groove wall is an obtuse angle. The front end face of the convex platform is a first inclined surface, and the first inclined surface is arranged parallel to the first front groove wall.
[0009] In the above-mentioned breaker, the cylinder body further has a third side groove wall located at the front of the first front groove wall. The inner diameter of the third side groove wall is smaller than that of the second side groove wall. The piston further has a second inclined surface located in front of the first inclined surface. The second inclined surface is arranged opposite to the first inclined surface, and the included angle between the second inclined surface and the third side groove wall is an acute angle. When the piston moves forward, the third side groove wall, the second inclined surface, and the first inclined surface define an oil storage cavity.
[0010] In the above-mentioned breaker, there is also an arc transition surface between the first inclined surface and the second inclined surface.
[0011] In the above-mentioned breaker, the cylinder body has a second front groove wall located at the constant high-pressure cavity. The second front groove wall faces the rear side of the cylinder body. The step surface is arranged opposite to the second front groove wall. When the piston moves forward and the first front groove wall contacts the first inclined surface, there is a distance between the second front groove wall and the step surface.
[0012] In the above-mentioned breaker, the cylinder body includes a middle cylinder body and a rear cylinder body. The rear cylinder body has a connecting plate connected to the middle cylinder body. The connecting plate has an air chamber shell. The air chamber shell has an air cavity for the piston to enter. The connecting plate also has at least two connecting seats for assembling with an excavator, and two of the connecting seats are respectively located on both sides of the air chamber shell.
[0013] In the above-mentioned breaker, there is an included angle between the outer contour of the air chamber shell and the connecting seat, and the opening of the included angle faces the rear side of the cylinder body.
[0014] In the above-mentioned breaker, the air chamber shell is in the shape of a frustum of a cone.
[0015] Compared with the prior art, the present breaker has the following advantages:
[0016] When the present breaker is working, the buffer cavity and the convex platform cooperate to buffer the piston. The buffer cavity is arranged at the rear side of the constant high-pressure cavity, so that when the piston moves forward to the limit position, the oil pressure in the constant high-pressure cavity can still act on the step surface, ensuring the working stability and working efficiency of the breaker. Description of the Drawings
[0017] Figure 1It is a schematic three-dimensional structure diagram of this breaker.
[0018] Figure 2 It is a sectional view of this breaker.
[0019] Figure 3 It is Figure 2 Partial enlarged view I of
[0020] Figure 4 It is Figure 2 Partial enlarged view II of
[0021] In the figure, 1 is the cylinder block; 1a is the constant high-pressure chamber; 1a1 is the second front groove wall; 1b is the buffer groove; 1b1 is the first front groove wall; 1b2 is the first side groove wall; 1b3 is the second side groove wall; 1b4 is the third side groove wall; 2 is the middle cylinder block; 3 is the rear cylinder block; 3a is the connecting plate; 3b is the air chamber shell; 3b1 is the air chamber; 3c is the connecting seat; 4 is the piston; 4a is the boss; 4a1 is the first inclined surface; 4a2 is the second inclined surface; 4b is the stepped surface. Specific embodiments
[0022] The following are specific embodiments of the present utility model and in combination with the accompanying drawings, the technical solutions of the present utility model are further described, but the present utility model is not limited to these embodiments.
[0023] As Figure 1 and 2 shown, this breaker includes a cylinder block 1. A piston 4 capable of reciprocating movement is provided in the cylinder block 1. A constant high-pressure chamber 1a is provided in the cylinder block 1. The piston 4 has a stepped surface 4b facing the front of the cylinder block 1. When the oil pressure in the constant high-pressure chamber 1a increases, it acts on the stepped surface 4b to push the piston 4 to move towards the rear of the cylinder block 1. A gas chamber 3b1 is provided at the tail end of the cylinder block 1. The gas chamber 3b1 is filled with high-pressure nitrogen. When the high-pressure oil is relieved from the constant high-pressure chamber 1a, the piston 4 moves towards the front of the cylinder block 1.
[0024] Further, as Figure 4As shown in the figure, a buffer groove 1b is further provided in the cylinder block 1. The buffer groove 1b is located at the rear side of the constant high-pressure chamber 1a. The buffer groove 1b has a first front groove wall 1b1 facing the rear side of the cylinder block 1. A boss 4a is provided on the piston 4. A buffer chamber is defined between the front end face of the boss 4a and the first front groove wall 1b1. When the piston 4 moves towards the front part of the cylinder block 1, the distance between the first front groove wall 1b1 and the front end face of the boss 4a changes, prompting the volume of the buffer chamber to become smaller. When the volume of the buffer chamber becomes smaller, the internal pressure increases to increase the buffer force of the piston 4. When the piston 4 moves forward to the limit position, the stepped surface 4b is always located in the constant high-pressure chamber 1a. Thus, it can be ensured that when the piston 4 needs to switch the moving direction, the oil pressure in the constant high-pressure chamber 1a can always act on the stepped surface 4b, enabling the piston 4 to be ensured to be re-force to move backward when moving forward to the limit position, ensuring the working stability and working efficiency of the breaker.
[0025] Further, as Figure 4 shown, the buffer groove 1b includes a first side groove wall 1b2 and a second side groove wall 1b3. The first side groove wall 1b2 is connected to the first front groove wall 1b1. The second side groove wall 1b3 is located behind the first side groove wall 1b2. The inner diameter of the first side groove wall 1b2 is larger than the inner diameter of the second side groove wall 1b3. The inner diameter of the buffer groove 1b at the second groove wall is the same as the outer diameter of the boss 4a. When the piston 4 moves forward, the buffer chamber can compress the internal oil when the volume decreases, increasing the oil pressure and enhancing the buffer effect.
[0026] Further, as Figure 4 shown, the first front groove wall 1b1 is inclined, and the included angle between the first front groove wall 1b1 and the first side groove wall 1b2 is an obtuse angle. The boss 4a has a first inclined surface 4a1 inclined towards the first front groove wall 1b1. The inclined settings of the first front groove wall 1b1 and the first inclined surface 4a1 can enhance the distribution effect of the oil pressure acting on the cylinder block 1 and the piston 4 when the oil pressure in the buffer chamber increases. Further, the first inclined surface 4a1 and the first front groove wall 1b1 are arranged parallel to each other.
[0027] Further, as Figure 4As shown, on the cylinder block 1, there is also a third side groove wall 1b4 located at the front of the first front groove wall 1b1. The inner diameter of the third side groove wall 1b4 is smaller than that of the second side groove wall 1b3. On the piston 4, there is also a second inclined surface 4a2 located at the front of the first inclined surface 4a1. The second inclined surface 4a2 is arranged opposite to the first inclined surface 4a1, and the included angle between the second inclined surface 4a2 and the third side groove wall 1b4 is an acute angle. When the piston 4 moves towards the front of the cylinder block 1, the oil in the buffer chamber is squeezed into the space between the third side groove wall 1b4 and the second inclined surface 4a2. Since the included angle between the second inclined surface 4a2 and the third side groove wall 1b4 is an acute angle, the oil will flow back towards the first inclined surface 4a1 from between the second inclined surface 4a2 and the third side groove wall 1b4 and act on the first inclined surface 4a1 to increase the buffering effect. Further, as Figure 4 shown, there is also an arc transition surface between the first inclined surface 4a1 and the second inclined surface 4a2. Through the arc transition surface, when the piston 4 moves forward in advance, the oil in the buffer chamber can be guided to the space between the second inclined surface 4a2 and the third side groove wall 1b4, thereby improving the buffering effect.
[0028] Further, as Figure 2 and Figure 3 shown, the cylinder block 1 has a second front groove wall 1a1 at the constant high-pressure chamber 1a. The second front groove wall 1a1 faces the rear side of the cylinder block 1. The step surface 4b is arranged opposite to the second front groove wall 1a1. When the piston 4 moves forward and the first front groove wall 1b1 contacts the first inclined surface 4a1, there is a gap between the second front groove wall 1a1 and the step surface 4b.
[0029] Further, as shown in 1 and Figure 2 shown, the cylinder block 1 includes a middle cylinder block 2 and a rear cylinder block 3. The rear cylinder block 3 has a connecting plate 3a connected to the middle cylinder block 2. The connecting plate 3a has an air chamber housing 3b. The air chamber housing 3b has an air chamber 3b1 for the piston 4 to enter. The connecting plate 3a also has at least two connecting seats 3c for assembling with an excavator, and two of the connecting seats 3c are respectively located on both sides of the air chamber housing 3b. By arranging the connecting seats 3c for connecting with the excavator on the rear cylinder block 3 and having the air chamber housing 3b on the rear cylinder block 3 located between the two connecting seats 3c, the overall length of the breaker can be reduced, the structure of the breaker is more compact, the weight is reduced, and the volume of the air chamber 3b1 can also be increased. Further, the air chamber housing 3b is frustum-shaped, and there is an included angle between the outer contour of the air chamber housing 3b and the connecting seats 3c, and the opening of the included angle faces the rear side of the cylinder block 1. The included angle between the outer contour of the air chamber housing 3b and the connecting seats 3c can provide a clearance for the assembly of the connecting seats 3c with the excavator.
[0030] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but they will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.
Claims
1. A breaker, comprising a cylinder block (1), a piston (4) capable of reciprocating movement is arranged in the cylinder block (1), and a constant high-pressure chamber (1a) is formed in the cylinder block (1), characterized in that, The piston (4) has a stepped surface (4b) facing the front of the cylinder block (1). The stepped surface (4b) is adapted to receive the pressure in the constant high-pressure chamber (1a). A buffer groove (1b) is further provided in the cylinder block (1) behind the constant high-pressure chamber (1a). The buffer groove (1b) has a first front groove wall (1b1) facing the rear of the cylinder block (1). A boss (4a) is provided on the piston (4). A buffer chamber is defined between the front end surface of the boss (4a) and the first front groove wall (1b1). When the piston (4) reciprocates, the space of the buffer chamber becomes larger or smaller. When the piston (4) moves forward to the limit position, the stepped surface (4b) is always located in the constant high-pressure chamber (1a).
2. The breaker according to claim 1, characterized in that, The buffer groove (1b) includes a first side groove wall (1b2) and a second side groove wall (1b3). The first side groove wall (1b2) is connected to the first front groove wall (1b1). The second side groove wall (1b3) is located behind the first side groove wall (1b2). The inner diameter of the first side groove wall (1b2) is larger than that of the second side groove wall (1b3).
3. The breaker according to claim 2, characterized in that, The first front groove wall (1b1) is inclined, and the included angle between it and the first side groove wall (1b2) is an obtuse angle. The front end surface of the boss (4a) is a first inclined surface (4a1), and the first inclined surface (4a1) is arranged parallel to the first front groove wall (1b1).
4. The breaker according to claim 3, wherein The cylinder block (1) further has a third side groove wall (1b4) at the front of the first front groove wall (1b1). The inner diameter of the third side groove wall (1b4) is smaller than that of the second side groove wall (1b3). The piston (4) further has a second inclined surface (4a2) in front of the first inclined surface (4a1). The second inclined surface (4a2) is arranged opposite to the first inclined surface (4a1), and the included angle between the second inclined surface (4a2) and the third side groove wall (1b4) is an acute angle.
5. The breaker according to claim 4, characterized in that, There is an arc transition surface between the first inclined surface (4a1) and the second inclined surface (4a2).
6. The breaker according to claim 1 or 2 or 3 or 4 or 5, characterized in that, The cylinder block (1) has a second front groove wall (1a1) at the constant high-pressure chamber (1a). The second front groove wall (1a1) faces the rear of the cylinder block (1). The stepped surface (4b) is arranged opposite to the second front groove wall (1a1). When the piston (4) moves forward and the first front groove wall (1b1) contacts the first inclined surface (4a1), there is a spacing between the second front groove wall (1a1) and the stepped surface (4b).
7. The breaker according to claim 1, wherein The cylinder block (1) includes a middle cylinder block (2) and a rear cylinder block (3). The rear cylinder block (3) has a connecting plate (3a) connected to the middle cylinder block (2). An air chamber shell (3b) is provided on the connecting plate (3a). The air chamber shell (3b) has an air chamber (3b1) for the piston (4) to enter. The connecting plate (3a) further has at least two connecting seats (3c) for assembling with an excavator, and two of the connecting seats (3c) are respectively located on both sides of the air chamber shell (3b).
8. The breaker according to claim 7, characterized in that, There is an included angle between the outer contour of the air chamber shell (3b) and the connecting seats (3c), and the opening of the included angle faces the rear of the cylinder block (1).
9. The breaker according to claim 8, wherein The air chamber shell (3b) is in the shape of a frustum of a cone.