CN218843222U - Flat pin buffer device of lower cylinder of breaking hammer - Google Patents
Flat pin buffer device of lower cylinder of breaking hammer Download PDFInfo
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- CN218843222U CN218843222U CN202222803625.4U CN202222803625U CN218843222U CN 218843222 U CN218843222 U CN 218843222U CN 202222803625 U CN202222803625 U CN 202222803625U CN 218843222 U CN218843222 U CN 218843222U
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Abstract
The utility model discloses a breaking hammer lower cylinder flat pin buffer device, a hollow lower cylinder body is internally sleeved with a drill rod which reciprocates up and down in the lower cylinder body, two opposite side walls of the lower cylinder body are provided with two groups of lower cylinder body flat pin holes, two flat pins respectively transversely penetrate through a pair of lower cylinder body flat pin holes which are oppositely arranged, the drill rod is arranged between the two flat pins, two ends of each flat pin are respectively provided with a damping block, a gap is reserved between the flat pin and the lower cylinder body flat pin hole, the damping blocks are in interference fit with the cylinder body flat pin holes, and each damping block comprises a metal insert and rubber wrapped outside the metal insert; the utility model discloses well flat round pin does not directly strike with lower cylinder body, acts on lower cylinder body through the tip snubber block, effectively reduces the impact force to lower cylinder body, improves the life of lower cylinder body, even there is empty the beating in the quartering hammer frock in-process, also can effectively protect lower cylinder body and drill rod, has certain air defense and beats the effect.
Description
Technical Field
The utility model belongs to the technical field of machinery, in particular to quartering hammer lower cylinder flat pin buffer.
Background
The hydraulic breaking hammer is usually installed on an excavator or a loader for use, and is mainly used for the works of breaking, dismantling, hard layer excavation, mining and the like in building construction. It is widely used because of its advantages of large impact force, convenient use, good maneuverability, high efficiency, etc.
The hydraulic breaking hammer generally comprises a front cylinder body, a middle cylinder body, a rear cylinder body, a drill rod arranged in the front cylinder body and a piston arranged in the middle cylinder body. The piston moves back and forth along the cylinder body in the axial direction, and the piston continuously strikes the drill rod, so that the drill rod strikes an object to be crushed. The drill rod is limited by the flat pin in the reciprocating motion, the flat pin is inserted into the flat pin hole of the lower cylinder body, and the flat pin can continuously collide with the flat pin hole when being subjected to the striking force of the drill rod, so that the cylinder body is easy to crack, and the product is scrapped.
The breaking hammer is easy to generate idle striking in the working process, when the breaking hammer does the idle striking, the piston transmits impact force to the drill rod, the drill rod transmits the impact force to the flat pin, and the flat pin is easy to break when bearing strong impact force. Because the flat pin is inserted into the flat pin hole of the lower cylinder body, the flat pin can collide with the hole wall, so that the cylinder body is easy to crack. The utility model discloses to the above-mentioned problem that prior art exists, provided a novel hydraulic breaking hammer lower cylinder body flat pin fixing device, this flat pin fixing device can effectively reduce the impact between flat pin and the cylinder body, solves the problem that flat pin and lower cylinder body easily cracked.
Disclosure of Invention
The utility model discloses to the problem that prior art exists, provided a jar flat pin buffer under quartering hammer, the device can effectively reduce the impact force between flat pin and the cylinder body, has improved the working life of lower cylinder body.
In order to achieve the purpose, the invention adopts the following technical scheme:
a lower cylinder flat pin buffer device of a breaking hammer is characterized in that a drill rod which reciprocates up and down in a lower cylinder body is sleeved in a hollow lower cylinder body, two groups of lower cylinder flat pin holes are formed in two opposite side walls of the lower cylinder body, two flat pins respectively transversely penetrate through a pair of lower cylinder flat pin holes which are oppositely formed, the drill rod is placed between the two flat pins, two ends of each flat pin are respectively provided with a damping block, a gap is reserved between each flat pin and the corresponding lower cylinder flat pin hole, the damping blocks and the corresponding cylinder flat pin holes are in interference fit, each damping block comprises a metal insert and rubber wrapped outside the metal insert, and the metal insert inside the damping blocks enables the structural strength of the damping blocks to be high and the service life to be prolonged; the external rubber plays a role in shock absorption and collision prevention.
Furthermore, the cross section of the flat pin is smaller than that of the lower cylinder flat pin hole, and a gap of 1mm is reserved between the lower cylinder flat pin hole and the flat pin, namely a gap is reserved between the outer circular surface of the flat pin and the inner circular surface of the lower cylinder flat pin hole.
Furthermore, the cross section of the damping block is larger than that of the lower cylinder flat pin hole, so that the magnitude of interference of 1mm exists between the damping block and the lower cylinder flat pin hole, namely, the outer arc surface of rubber of the peripheral rubber of the damping block and the inner circular surface of the lower cylinder flat pin hole are in interference fit.
Furthermore, the outer wall of the metal insert is provided with a protrusion, the rubber is attached to the surface of the metal insert through a rubber coating process, and the rubber can be more firmly attached to the surface of the metal insert through the rubber coating process.
Furthermore, the damping block and the flat pin are fixed through bolts.
Furthermore, two ends of the flat pin are fixed through a fixing pin respectively, and the fixing pin transversely penetrates through the lower cylinder body and is clamped at two ends of the flat pin.
Furthermore, the two ends of the fixing pin are respectively provided with a clamp spring to prevent the fixing pin from moving.
Furthermore, the inner side of the damping block is provided with a U-shaped groove which is convenient for the fixed pin to pass through.
Further, the penetrating direction of the flat pin relative to the lower cylinder body and the penetrating direction of the fixing pin relative to the lower cylinder body are perpendicular to each other.
Furthermore, an inwards-recessed C-shaped groove is formed in the side wall, opposite to the drill rod, of the drill rod, and the flat pin is located in the C-shaped groove.
Compared with the prior art, the utility model discloses following beneficial effect has:
the middle flat pin of the utility model does not directly impact the lower cylinder body, and acts on the lower cylinder body through the end damping block, thereby effectively reducing the impact force on the lower cylinder body and prolonging the service life of the lower cylinder body;
the utility model can effectively protect the lower cylinder body and the piston (drill rod) even if the breaking hammer has idle beating in the tooling process, and has certain idle beating preventing function;
the utility model discloses simple structure, reasonable in design protects the cotter and lower cylinder body, improves working life.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is an assembly view of the present invention;
FIG. 3 isbase:Sub>A cross-sectional view A-A of FIG. 2;
FIG. 4 is an enlarged view of a portion of FIG. 2 at C;
FIG. 5 is a schematic illustration of the drill rod during operation;
FIG. 6 is a cross-sectional view B-B of FIG. 5;
in the figure: 1-lower cylinder body, 11-lower cylinder body flat pin hole, 2-flat pin, 3-fixed pin, 4-shock absorption block, 41-metal insert, 42-rubber, 43-U-shaped groove, 5-bolt, 6-snap spring, 7-drill rod and 71-C-shaped groove.
Detailed Description
The invention is further explained below with reference to the drawings.
As shown in fig. 1, a drill rod 7 reciprocating up and down in a lower cylinder body 1 is arranged in the hollow lower cylinder body 1, two groups of lower cylinder body flat pin holes 11 are arranged on two opposite side walls of the lower cylinder body 1, two flat pins 2 respectively transversely penetrate through a pair of lower cylinder body flat pin holes 11 which are oppositely arranged, the drill rod 7 is arranged between the two flat pins 2, two ends of each flat pin 2 are respectively provided with a damping block 4, the damping block 4 and the flat pin 2 are fixed through bolts 5, a gap is reserved between the flat pin 2 and the lower cylinder body flat pin hole 11, the damping block 4 and the cylinder body flat pin holes 11 are in interference fit, the damping block 4 comprises a metal insert 41 and rubber 42 wrapping the outside of the metal insert 41, and the metal insert 41 inside ensures that the damping block 4 has high structural strength and prolongs the service life; the outer rubber 42 serves as a shock absorber and an anti-collision function.
As shown in fig. 2-4, the cross section of the flat pin 2 is smaller than that of the lower cylinder flat pin hole 11, and a gap of 1mm is left between the lower cylinder flat pin hole 11 and the flat pin 2, that is, a gap is left between the outer circular surface 2a of the flat pin 2 and the inner circular surface 11a of the lower cylinder flat pin hole 11; the cross section of the shock absorption block 4 is larger than that of the lower cylinder flat pin hole 11, so that the magnitude of interference of 1mm exists between the shock absorption block 4 and the lower cylinder flat pin hole 11, namely, the outer rubber arc surface 4a of the peripheral rubber 42 of the shock absorption block 4 is in interference fit with the inner circular surface 11a of the lower cylinder flat pin hole 11; the outer wall of the metal insert 41 is provided with a bulge, and the rubber 42 is attached to the surface of the metal insert through a rubber coating process.
Preferably, both ends of the flat pin 2 are fixed by a fixing pin 3, the fixing pin 3 transversely penetrates through the lower cylinder 1 and is clamped by both ends of the flat pin 2, and both ends of the fixing pin 3 are provided with a snap spring 6 respectively to prevent the fixing pin 3 from moving. The inner side of the damping block 4 is provided with a U-shaped groove 43 which is convenient for the fixing pin 3 to pass through.
Preferably, the insertion direction of the flat pin 2 into the lower cylinder 1 and the insertion direction of the fixing pin 3 into the lower cylinder 1 are perpendicular to each other. The opposite side walls of the drill rod 7 are provided with inwards-recessed C-shaped grooves 71, the flat pins 2 are located in the C-shaped grooves 71, the drill rod 7 reciprocates in the lower cylinder body 1, when the drill rod 7 moves downwards, the arc surface 7a at the top of the C-shaped grooves 71 on the drill rod 7 collides with the outer circular surface 2a of the flat pins 2, the impact force of the drill rod 7 is transmitted to the flat pins 2, and the two flat pins 2 are the same in height relative to the drill rod 7.
As shown in fig. 5 and 6, the principle of the present invention is: the drill rod 7 does reciprocating motion in the lower cylinder body 1, when the drill rod 7 moves downwards, the arc surface 7a at the top of the C-shaped groove 71 on the drill rod 7 collides with the outer circular surface 2a of the flat pin 2, the impact force of the drill rod 7 is transmitted to the flat pin 2, and the flat pin 2 and the lower cylinder body 1 have a gap, namely the flat pin 2 is not contacted with the lower cylinder body 1, so that the flat pin 2 transmits the impact force to the shock absorption block 4, the shock absorption block 4 is tightly matched with the lower cylinder body 1 and acts on the lower cylinder body 1 through the shock absorption block 4, and the shock absorption effect is realized due to the existence of the peripheral rubber 42 of the shock absorption block 4, and the impact force between the flat pin 2 and the lower cylinder body 1 can be effectively reduced; simultaneously, the quartering hammer has the not empty phenomenon of beating of equidimension in work, and the empty impact of beating all can cause serious damage to drill rod 7, flat pin 2, lower cylinder body 1, consequently the utility model discloses also can reduce the empty impact force to lower cylinder body when beating, solve flat pin 2 and the problem that lower cylinder body 1 easily cracked, improved lower cylinder body 1's working life.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A lower cylinder flat pin buffer device of a breaking hammer is characterized in that a drill rod (7) which reciprocates up and down in a lower cylinder body (1) is arranged in the hollow lower cylinder body (1), two groups of lower cylinder flat pin holes (11) are arranged on two opposite side walls of the lower cylinder body (1), two flat pins (2) respectively transversely penetrate through a pair of lower cylinder flat pin holes (11) which are arranged oppositely, the drill rod (7) is arranged between the two flat pins (2), two shock absorption blocks (4) are arranged at two ends of each flat pin (2), a gap is reserved between each flat pin (2) and the lower cylinder flat pin hole (11), the shock absorption blocks (4) are in interference fit with the cylinder flat pin holes (11), and each shock absorption block (4) comprises a metal insert (41) and rubber (42) wrapping the outer portion of the metal insert (41).
2. A breaking hammer lower cylinder flat pin buffering device according to claim 1, characterized in that the cross section of the flat pin (2) is smaller than the cross section of the lower cylinder flat pin hole (11), leaving a 1mm gap between the lower cylinder flat pin hole (11) and the flat pin (2).
3. The breaking hammer lower cylinder flat pin cushioning device according to claim 1, characterized in that the cross section of the damper block (4) is larger than the cross section of the lower cylinder flat pin hole (11), so that the interference between the damper block (4) and the lower cylinder flat pin hole (11) is 1 mm.
4. The impact damper of the lower cylinder flat pin of the breaking hammer according to claim 1, characterized in that the outer wall of the metal insert (41) is provided with a bulge, and the rubber (42) is attached to the surface of the metal insert (41) through an encapsulation process.
5. The impact damper of the lower cylinder flat pin of the breaking hammer according to claim 1 or 3, characterized in that the damping block (4) and the flat pin (2) are fixed by a bolt (5).
6. A breaking hammer lower cylinder flat pin buffer according to claim 1, characterized in that the flat pin (2) is fixed at both ends by a fixed pin (3), and the fixed pin (3) transversely penetrates the lower cylinder (1) and blocks the flat pin (2) from both ends.
7. The impact damper of the lower cylinder flat pin of the breaking hammer according to claim 6, characterized in that the two ends of the fixed pin (3) are each provided with a snap spring (6).
8. The impact damper of the lower cylinder flat pin of the breaking hammer according to claim 6, characterized in that the inside of the shock absorption block (4) is provided with a U-shaped groove (43) for the fixed pin (3) to pass through.
9. The breaking hammer lower cylinder flat pin cushioning device according to claim 1, characterized in that the penetrating direction of the flat pin (2) with respect to the lower cylinder (1) and the penetrating direction of the fixing pin (3) with respect to the lower cylinder (1) are perpendicular to each other.
10. A breaking hammer lower cylinder flat pin buffer device according to claim 1, characterized in that the opposite side walls of the drill rod (7) are provided with inwardly recessed C-shaped grooves (71), and the flat pin (2) is positioned in the C-shaped grooves (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222803625.4U CN218843222U (en) | 2022-10-24 | 2022-10-24 | Flat pin buffer device of lower cylinder of breaking hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222803625.4U CN218843222U (en) | 2022-10-24 | 2022-10-24 | Flat pin buffer device of lower cylinder of breaking hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218843222U true CN218843222U (en) | 2023-04-11 |
Family
ID=87305463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222803625.4U Active CN218843222U (en) | 2022-10-24 | 2022-10-24 | Flat pin buffer device of lower cylinder of breaking hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218843222U (en) |
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2022
- 2022-10-24 CN CN202222803625.4U patent/CN218843222U/en active Active
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