A hydraulic breaker and method

Abstract

This invention belongs to the field of hydraulic breakers, specifically a hydraulic breaker and its method. The breaker includes a side shell, a lower cylinder, and a transverse pin. A constraint groove is provided on one side of the side shell, opposite to the side shell. The transverse pin is assembled into the constraint groove from between the side shells towards the lower cylinder to press-fit and fix the transverse pin. Compared to the conventional lateral insertion method, this transverse pin ensures that the transverse pin is assembled into the transverse groove without shifting within the groove, thus preventing the formation of stepped grooves and addressing the problem of premature damage to the transverse pin or cylinder, ensuring the structural stability and durability of the breaker. It also avoids the need for a transverse pin hole in the lower cylinder and the problem of damage to the transverse pin easily causing damage to the lower cylinder and affecting subsequent construction.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic breakers, specifically a hydraulic breaker and its method. Background Technology

[0002] A hydraulic breaker is a machine that converts hydraulic energy into mechanical energy to perform work. It is mainly used for crushing, demolition, and excavation of hard layers, and is usually installed on excavators, loaders, or power stations.

[0003] A search revealed that CN203846551U discloses a hydraulic breaker that uses a horizontal pin installed in a hole in the cylinder to restrict the flat pin within the flat pin groove. However, this method causes the flat pin to wobble within the groove, and the breaker inevitably experiences the problem of firing without hitting the target. Once the position of the flat pin changes within the groove, a stepped groove will appear on the inner wall of the groove, which will accelerate the damage to the flat pin or the cylinder. Therefore, there is an urgent need to solve this problem. Summary of the Invention

[0004] The technical problem to be solved by this invention is:

[0005] 1. Solve the problem of the flat pin shifting within the flat pin groove, which accelerates the damage to the flat pin or cylinder.

[0006] 2. Solve the problem of how to detect and replace damaged flat pins as soon as possible.

[0007] 3. Solve the problem of inconvenient installation of the chisel rod at the site of the hydraulic breaker.

[0008] To solve the above-mentioned technical problems, the inventors, through practice and summarization, derived the technical solution of this invention, which adopts the following technical solution:

[0009] A hydraulic breaker, comprising:

[0010] The lower cylinder body is provided with a flat pin groove, and a flat pin body for limiting the drill rod is installed in the flat pin groove. The length of the flat pin body is greater than or equal to the depth of the flat pin groove.

[0011] The side housing is provided in two sets and is symmetrically distributed on both sides of the lower cylinder. The two sets of side housings are connected by bolts and the lower cylinder is clamped to the inside of the two sets of side housings. A constraint groove is provided on the opposite side of the side housing.

[0012] The horizontal pin is a telescopic structure with both ends able to freely extend and retract between the two side shells and enter the constraint groove, and both ends are provided with extrusion slopes.

[0013] The above solution describes the horizontal pin in detail. When the flat pin is damaged, it cannot be detected in time. This can lead to permanent damage to the cylinder or deformation of the flat pin, which may cause it to get stuck in the flat pin groove after being hit by the chisel. Alternatively, the horizontal pin may break, causing the horizontal pin to get stuck or the edge of the pin hole to be damaged. The horizontal pin includes a clamping part, two telescopic ends that slide in the clamping part, and an elastic body that is located between the two telescopic ends and inside the clamping part.

[0014] The telescopic end is provided with a connecting post located outside the pressing part. The connecting post is located on the side of the telescopic end facing away from the lower cylinder body. The telescopic end is inserted into the constraint groove. The end of the telescopic end is provided with a pressing slope that gradually deviates outward from the side close to the lower cylinder body. The pressing part is provided with a pressure-bearing expansion member on the side facing the flat pin. After the pressure-bearing expansion member is subjected to the outward pressing force of the flat pin body, it expands rapidly and drives the two telescopic ends to retract and compress the elastic body.

[0015] The above scheme describes in detail the synchronous operation of the two telescopic ends to avoid the problem that the flat pin on one side is damaged and the other telescopic end does not extend or retract, causing the cross pin to fail to fall off automatically. The pressing part is provided with a groove on the side facing the lower cylinder. A transmission gear is rotatably installed in the groove. One end of the telescopic end extends into the groove and is connected to a moving plate. A rack is installed on the moving plate. Both racks mesh with the transmission gear and are distributed on both sides of the transmission gear.

[0016] The two ends of the elastomer are respectively connected to the corresponding moving plates.

[0017] The automatic detachment of the horizontal pin in the above scheme is described in detail. The internal part of the clamping part is equipped with a battery cell and a control module. The battery cell and the control module are electrically connected. The side of the clamping part is provided with an opening groove, which is connected to the sink groove.

[0018] The pressure-bearing expansion component includes a resistive strain gauge mounted on one side of the flat pin and an airbag assembled in the clamping part. The resistive strain gauge is connected to the circuit and the control module. The airbag is installed in the opening groove. A separator membrane and a resistance wire embedded in the separator membrane are pre-placed in the airbag. The separator membrane divides the airbag into an internal storage compartment one and an internal storage compartment two. The resistance wire is electrically connected to the circuit and the control module.

[0019] Among them, the resistance strain gauge and the telescopic end are coplanar on the side opposite to the lower cylinder.

[0020] In the above scheme, the airbag body and the control circuit are connected to form a closed loop, which is described in detail. The opening slot is embedded with a through electrode plate, which is electrically connected to the control module. The airbag body is provided with an elastic terminal that is electrically connected to the internal resistance wire, and the elastic terminal is electrically connected to the through electrode plate.

[0021] The connection relationship between the side housing and the lower cylinder body in the above scheme is described in detail. The side of the lower cylinder body is provided with a groove, and the side housing is provided with a limiting boss. The limiting boss and the groove are in corresponding and compatible positions.

[0022] The above solution describes in detail how to facilitate the replacement of the drill rod at the construction site. The side of the side housing is equipped with four mounting seats, each of which is equipped with a hydraulic cylinder. The ends of the four hydraulic cylinders are connected to a lifting frame. The lifting frame is equipped with a support ring, and the support ring is equipped with a clamping component for clamping and fixing the drill rod.

[0023] The clamping component includes a fixed base, a clamping body that slides radially on the fixed base along the support ring, and a connecting spring installed on the fixed base. The connecting spring is installed on the side of the clamping body facing away from the drill rod.

[0024] A drive unit is installed on the lower cylinder block. The drive unit acts to bring the clamping body close to the drill rod. The bottom surface of the drive unit is provided with a slope that is inclined downward along the side away from the drill rod, and the top surface of the clamping body is provided with a slope that is inclined upward along the side close to the drill rod.

[0025] An assembly method for a hydraulic breaker, comprising the following steps:

[0026] Step 1, Main assembly

[0027] The side shells are distributed on both sides of the lower cylinder and are fastened with bolts to form the main structure;

[0028] Step 2, drill rod assembly

[0029] Adjust the axes of the chisel and the lower cylinder to be aligned, and pass the assembly end of the chisel through the support ring until it partially enters the lower cylinder.

[0030] The piston rod of the hydraulic cylinder drives the lifting frame and support ring to move closer to the lower cylinder body, causing the driving component to act on the clamping body to approach the chisel. The clamping body clamps the flat pin mounting part of the chisel from both sides, correcting the angle of the chisel so that the flat pin mounting part and the flat pin groove position correspond along the assembly direction.

[0031] The hydraulic cylinder piston rod drives the lifting frame and support ring to move away from the lower cylinder body, and the clamping part is completely separated from the flat pin clamping part;

[0032] While maintaining the angle, insert the entire assembly end of the chisel into the lower cylinder along the assembly direction.

[0033] Step 3, assemble one side of the cross pin.

[0034] Before assembling the flat pin, pre-install a set of cross pins, adjust the operating column to retract the two telescopic ends into the clamping part until it is less than the distance between the two constraint grooves, press the clamping part against the surface of the lower cylinder and release the operating column, and the telescopic ends enter the constraint grooves.

[0035] Step 4, Flat pin assembly

[0036] The flat pin is assembled into the flat pin groove, and the force exerted on the flat pin when it contacts the clamping part is less than the set value.

[0037] Step 5, assemble the other side of the cross pin.

[0038] Adjust the two operating pins on the horizontal pin to retract the two telescopic ends into the clamping part until they are less than the distance between the two constraint grooves. After the clamping part is attached to the surface of the flat pin, release the operating pins, and the telescopic ends enter the constraint grooves.

[0039] Compared with the prior art, the present invention has the following advantages over the conventional side-mounted transverse pin structure and the side opening of the lower cylinder:

[0040] 1. This invention employs a transverse pin along the length of the flat pin to confine it within the flat pin groove. The transverse pin is assembled from the side housings towards the lower cylinder. Compared to the conventional lateral insertion method, this transverse pin ensures that the flat pin, once assembled in the groove, will not move within the groove, thus preventing the formation of stepped grooves within the groove. This solves the problem of premature damage to the flat pin or cylinder, ensuring the structural stability and durability of the hydraulic breaker. It also avoids the need for transverse pin holes in the lower cylinder and the risk of damage to the lower cylinder due to transverse pin damage, which could affect subsequent construction work.

[0041] 2. The present invention uses a pressure-expanding component on the horizontal pin. When the flat pin is damaged, pressure can be applied to the horizontal pin. After being compressed, the horizontal pin can spring outward, causing the telescopic end to disengage from the constraint groove. This avoids direct damage to the horizontal pin and also prompts the operator to replace the flat pin. This effectively solves the problem of the flat pin getting stuck inside the lower cylinder due to further damage.

[0042] 3. The present invention is provided with a hydraulic cylinder on the side shell. The hydraulic cylinder drives the connecting frame, support ring and other structures to move, thereby realizing the angle correction of the drill rod. This facilitates the vertical alignment of the flat pin mounting area and the flat pin groove along the assembly direction. The drill rod is assembled vertically along the assembly direction while maintaining this angle until the front and rear positions of the flat pin mounting area and the flat pin groove are aligned, and then the flat pin is inserted. When replacing the drill rod on-site, the track applies pressure to the broken end of the drill rod (utilizing the taper of the broken end), causing the assembly end of the drill rod to tilt upwards. The robotic arm is then manipulated to align the drill rod assembly port of the lower cylinder of the breaker with the axis of the drill rod, and the assembly end of the drill rod is inserted into the assembly port of the lower cylinder along the assembly direction, with the flat pin clamping area exposed on the outside. Subsequently, the track disengages from the broken end of the drill rod, and the hydraulic cylinder drives the lifting frame and support ring closer to the lower cylinder. The driving component acts on the clamping body to hold the flat pin clamping area, completing the correction of the assembly angle of the flat pin clamping area on the drill rod. After correction, the track reapplies pressure to the broken end of the drill rod, and then the hydraulic cylinder drives the connecting frame away from the lower cylinder, causing the clamping body to completely disengage from the drill rod. The robotic arm is then manipulated to maintain the assembly end of the drill rod at this angle and insert it into the assembly port of the lower cylinder along the assembly direction until the flat pin clamping area and the front and rear positions of the flat pin groove are aligned. The flat pin body and cross pin are then installed in sequence, completing the on-site replacement operation of the drill rod. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0044] Figure 2 The cross-sectional structure of the transverse pin of the present invention Figure 1 ;

[0045] Figure 3 The cross-sectional structure of the transverse pin of the present invention Figure 2 ;

[0046] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0047] Figure 5 for Figure 3 A magnified view of a section at point B in the middle;

[0048] Figure 6 This is a cross-sectional view of the airbag body of the present invention;

[0049] Figure 7 This is a schematic diagram of the structure of the airbag body of the present invention;

[0050] Figure 8 This is a schematic diagram of the pressing part of the present invention on the side opposite to the lower cylinder body;

[0051] Figure 9 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0052] Figure 10 for Figure 9 A magnified view of a section at point C;

[0053] Figure 11 A diagram showing the state of the drill rod when the angle of the clamping body is being corrected.

[0054] Figure 12 This is a schematic diagram of the structure of the clasping organism;

[0055] Figure 13 A top view showing the support ring and the fixing mechanism;

[0056] Figure 14 This is a horizontal cross-sectional view of the hydraulic breaker at the flat pin.

[0057] Figure 15 This is a schematic diagram of the fixed base.

[0058] In the diagram: 10. Lower cylinder body; 20. Side shell; 21. Limiting boss; 22. Groove; 23. Mounting side seat; 24. Hydraulic cylinder; 25. Support ring; 26. Lifting frame; 27. Drive component; 28. Fixed seat; 281. Connecting spring; 282. Clamping body; 30. Horizontal pin; 31. Pressing part; 311. Countersunk opening; 312. Transmission gear; 313. Rack; 314. Moving plate; 315. Battery cell; 316. Control module; 317. Opening slot; 32. Telescopic end; 33. Elastomer; 34. Operating column; 40. Flat pin; 50. Drill rod; 60. Pressure-bearing expansion component; 61. Resistance strain gauge; 62. Airbag body; 63. Separating membrane; 64. Resistance wire; 65. Through port; 66. Through electrode plate; 67. Elastic terminal. Detailed Implementation

[0059] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0060] Example 1

[0061] like Figure 1 As shown, a hydraulic breaker includes:

[0062] The lower cylinder body 10 is provided with a flat pin groove, and a flat pin body 40 for limiting the drill rod 50 is installed in the flat pin groove. The length of the flat pin body 40 is greater than or equal to the depth of the flat pin groove, preferably equal to. When it is greater than, the lengths of the two exposed ends need to be consistent.

[0063] Side housings 20, two sets of side housings 20 are provided and symmetrically distributed on both sides of the lower cylinder body 10. The two sets of side housings 20 are connected by bolts and the lower cylinder body 10 is clamped to the inner side of the two sets of side housings 20. A constraint groove is provided on the opposite side of the side housing 20, as shown in the figure. Figure 14 As shown;

[0064] The horizontal pin 30 is a telescopic structure, and its two ends can freely extend and retract between the two side shells 20 to enter the constraint groove. Both ends are provided with extrusion slopes with an inclination angle of 45°-70°.

[0065] In specific implementation, the horizontal pin 30 is first installed on one side housing 20, the flat pin 40 is installed in the corresponding flat pin groove, and then another set of horizontal pins 30 is installed to fix the flat pin 40. After fixing, the flat pin 40 and the end of the horizontal pin 30 abut against each other, and the horizontal pin 30 is installed between the two side housings 20 close to the lower cylinder 10. The surface pressure constraint on the end of the flat pin 40 is achieved by using the extrusion slope of the end of the horizontal pin 30.

[0066] Example 2

[0067] Based on Example 1, such as Figure 2 As shown, the horizontal pin 30 includes a pressing part 31, two telescopic ends 32 that are slidably fitted inside the pressing part 31, and an elastic body 33 disposed between the two telescopic ends 32 and inside the pressing part 31; the two telescopic ends 32 are retracted and extended through the elastic body 33, so that they can complete the side abutment installation of the horizontal pin 30.

[0068] An operating column 34 is provided on the telescopic end 32, located outside the pressing part 31. The operating column 34 is located on the side of the telescopic end 32 facing away from the lower cylinder 10. The telescopic end 32 can be retracted through the operating column 34, which is convenient for operation.

[0069] The telescopic end 32 is inserted into the constraint groove. The end of the telescopic end 32 is provided with a pressing slope that gradually deviates outward from the side close to the lower cylinder 10. The pressing slope can act on the constraint groove to make the telescopic end 32 enter the constraint groove while the pressing part 31 moves closer to the lower cylinder 10.

[0070] Example 3

[0071] Based on Example 2, such as Figures 3 to 8 As shown, a pressure-bearing expansion member 60 is provided on the side of the pressing part 31 facing the flat pin 40. After the pressure-bearing expansion member 60 is subjected to the outward squeezing force of the flat pin 40, it expands rapidly, causing the two telescopic ends 32 to retract and compress the elastic body 33.

[0072] Once the flat pin 40 is damaged, the chisel 50, under the impact of the piston in the cylinder of the breaker, causes the flat pin 40 to move out of the groove, which in turn causes the pressure-bearing expansion member 60 to expand, overcoming the force of the elastic body 33 pressing on the end of the flat pin 40, so that the telescopic end 32 retracts and completes its separation from the constraint groove.

[0073] Example 4

[0074] In the scheme of embodiment 3, since the flat pin 40 of the breaker hammer is generally installed in two sets, if one set of flat pin 40 is damaged, only one of them can be compressed, which may easily cause the cross pin 30 to fail to fall off automatically. The inventor made the following design:

[0075] like Figure 3 , Figure 5 As shown, the pressing part 31 has a recessed groove 311 on the side facing the lower cylinder 10. A transmission gear 312 is rotatably installed in the recessed groove 311. One end of the telescopic end 32 extends into the recessed groove 311 and is connected to a moving plate 314. A rack 313 is installed on the moving plate 314. Both racks 313 mesh with the transmission gear 312 and are distributed on both sides of the transmission gear 312.

[0076] The two ends of the elastomer 33 are respectively connected to the corresponding movable plate 314.

[0077] When the pressure-bearing expansion member 60 expands under pressure, it can simultaneously drive the telescopic end 32 to automatically retract while overcoming the force of the elastic body 33, so that the two ends can move synchronously, thereby ensuring that the pressure-bearing expansion member 60 is subjected to uniform force and moves uniformly when it leaves the constraint groove.

[0078] Example 5

[0079] In the scheme of embodiment 4, in order to achieve the expansion of the pressure-bearing expansion member 60 when the pressing part 31 is pressed, overcoming the force of the elastic body 33 and driving the telescopic end 32 to disengage from the constraint groove, the inventors made the following improvement:

[0080] like Figure 3 , Figure 4 As shown, a battery cell 315 and a control module 316 are installed inside the clamping part 31. The battery cell 315 and the control module 316 are electrically connected. An opening groove 317 is provided on the side of the clamping part 31, and the opening groove 317 communicates with the sink 311.

[0081] The pressure-bearing expansion member 60 is provided with two parts corresponding to the ends of the two flat pins 40. The pressure-bearing expansion member 60 includes a resistance strain gauge 61 installed on one side opposite to the flat pin 40 and an air bladder 62 assembled in the clamping part 31. The resistance strain gauge 61 is connected to the control module 316 via a circuit + signal line. The air bladder 62 is installed in the opening groove 317. A separator 63 and a resistance wire 64 embedded in the separator 63 are pre-placed in the air bladder 62. The separator 63 divides the air bladder 62 into an internal storage compartment one and an internal storage compartment two. In use, the internal storage compartment one is at the top and is filled with quicklime, iron powder, aluminum powder, activated carbon and salt (sodium carbonate). The internal storage compartment two is at the bottom and is filled with water. The resistance wire 64 is electrically connected to the control module 316 via a circuit.

[0082] Among them, the resistance strain gauge 61 and the telescopic end 32 are coplanar or protrude 0.1mm outward relative to one side of the lower cylinder 10;

[0083] Among them, such as Figure 8 As shown, the clamping part 31 has a through port 65 on one side of the lower cylinder 10. The through port 65 is distributed on both sides of the resistive strain gauge 61. The through port 65 is used to apply an outward thrust to the lower cylinder after the airbag 62 expands, so as to overcome the force of the elastic body 33.

[0084] like Figure 4 , Figure 6 , Figure 7 As shown, the opening slot 317 is embedded with a through electrode plate 66, which is electrically connected to the control module 316. The airbag body 62 is provided with an elastic terminal 67 electrically connected to the internal resistance wire 64, and the elastic terminal 67 is electrically connected to the through electrode plate 66. The through electrode plate 66 ensures that the internal resistance wire 64 is electrically connected via the elastic terminal 67 after installation, ensuring that power can be supplied to the resistance wire 64 to melt the separator membrane 63 during operation. This allows the pre-filled materials inside the first and second internal storage compartments to come into contact and undergo a chemical reaction, generating a large amount of heat or gas. This causes the airbag body 62 to expand, pushing the cylinder and the moving plate 314 to move, overcoming the initial surface pressure of the elastic body 33 on the flat pin 40, and achieving automatic release from the constraint slot.

[0085] like Figure 13 As shown, the lower cylinder body 10 has a groove 22 on its side, and the side housing 20 has a limiting boss 21. The limiting boss 21 and the groove 22 are positioned and fitted together, which facilitates the assembly of the lower cylinder body 10 and the side housing 20.

[0086] Example 6

[0087] In the aforementioned hydraulic breaker design, the chisel 50 is relatively heavy and difficult to assemble, especially since it is not possible to assemble the chisel 50 effectively and quickly on the construction site. Therefore, the inventors have made the following improvements:

[0088] like Figures 9 to 14 As shown, four mounting seats 23 are installed on the side of the side housing 20. Each mounting seat 23 is equipped with a hydraulic cylinder 24. The ends of the four hydraulic cylinders 24 are connected to a lifting frame 26. A support ring 25 is provided on the lifting frame 26. Two symmetrically distributed clamping parts are installed on the support ring 25. The clamping parts are used to clamp and fix the drill rod 50.

[0089] The clamping component includes a fixing base 28, such as Figure 15 As shown, a retaining body 282 is slidably fitted on the fixed base 28 along the support ring 25 in the radial direction. A connecting spring 281 is installed on the fixed base 28. The connecting spring 281 is installed on the side of the retaining body 282 facing away from the drill rod 50.

[0090] A drive component 27 is installed on the lower cylinder body 10. The drive component 27 causes the clamping body 282 to approach the chisel 50. The bottom surface of the drive component 27 is provided with a slope that is inclined downward along the side away from the chisel 50, and the top surface of the clamping body 282 is provided with a slope that is inclined upward along the side close to the chisel 50.

[0091] The hydraulic cylinder 24 drives the lifting frame 26 and the support ring 25 to move closer to the lower cylinder 10. The driving component 27 will act on the clamping body 282 to move closer to the chisel 50, causing the angle of the flat pin mounting area to be corrected to the position corresponding to the assembly direction. After the position is corrected, the angle is maintained. The driving component 27 is moved in the opposite direction to completely disengage from the chisel 50. After disengaging from the chisel 50, the chisel 50 is installed inside the lower cylinder 10 along the assembly direction. The assembly of the chisel 50 is completed by the flat pin 40 and the cross pin 30. At the construction site, the tracks of the tracked vehicle are used to lift the assembly end of the chisel 50 and maintain the angle of the chisel.

[0092] An assembly method for a hydraulic breaker, comprising the following steps:

[0093] Step 1, Main assembly

[0094] The side housings 20 are distributed on both sides of the lower cylinder 10 and fastened with bolts to form the main structure;

[0095] Step 2, Assembly of 50 drill rods

[0096] Adjust the axes of the chisel 50 and the lower cylinder 10 to coincide, and pass the assembly end of the chisel 50 through the support ring 25 until it partially enters the lower cylinder 10;

[0097] The piston rod of the hydraulic cylinder 24 drives the lifting frame 26 and the support ring 25 to move closer to the lower cylinder body 10, causing the driving component 27 to act on the clamping body 282 to approach the chisel 50. The clamping body clamps the flat pin mounting part of the chisel 50 from both sides, correcting the angle of the chisel 50 so that the flat pin mounting part and the flat pin groove position correspond along the assembly direction.

[0098] The piston rod of the hydraulic cylinder 24 drives the lifting frame 26 and the support ring 25 to move away from the lower cylinder 10, and the clamping part is completely separated from the flat pin clamping part.

[0099] While maintaining the angle, insert the entire assembly end of the chisel 50 into the lower cylinder 10 along the assembly direction.

[0100] Step 3, assemble one side of the cross pin 30.

[0101] Before assembling the flat pin 40, pre-install a set of horizontal pins 30, adjust the operating column 34 to retract the two telescopic ends 32 into the clamping part 31 until it is less than the distance between the two constraint grooves, press the clamping part 31 against the surface of the lower cylinder 10 and release the operating column 34, and the telescopic ends 32 enter the constraint groove.

[0102] Step 4, assemble the flat pin 40.

[0103] The flat pin 40 is assembled in the flat pin groove, and the force exerted by the flat pin 40 on the clamping part 31 when it contacts the clamping part is less than the set value.

[0104] Step 5, assemble the other side of the horizontal pin 30.

[0105] Adjust the two operating posts 34 on the horizontal pin 30 to partially retract the two telescopic ends 32 into the clamping part 31 until they are less than the distance between the two constraint grooves. After the clamping part 31 is attached to the surface of the flat pin 40, release the operating posts 34, and the telescopic ends 32 enter the constraint grooves.

[0106] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. A hydraulic breaker, characterized in that, include: The lower cylinder body (10) is provided with a flat pin groove, and a flat pin body (40) for limiting the drill rod (50) is installed in the flat pin groove. The length of the flat pin body (40) is greater than or equal to the depth of the flat pin groove. Side housing (20), two sets of side housing (20) are provided and symmetrically distributed on both sides of the lower cylinder (10). The two sets of side housing (20) are connected by bolts and the lower cylinder (10) is clamped inside the two sets of side housing (20). A constraint groove is provided on the opposite side of the side housing (20). The horizontal pin (30) is a telescopic structure and its two ends can freely extend and retract between the two side shells (20) to enter the constraint groove, and both ends are provided with extrusion slopes; The extrusion slope at the end of the horizontal pin (30) achieves surface pressure constraint on the end of the flat pin (40).

2. A hydraulic breaker according to claim 1, characterized in that, The horizontal pin (30) includes a pressing part (31), two telescopic ends (32) that are slidably fitted inside the pressing part (31), and an elastic body (33) disposed between the two telescopic ends (32) and inside the pressing part (31). An operating column (34) is provided on the telescopic end (32) outside the pressing part (31). The operating column (34) is located on the side of the telescopic end (32) facing away from the lower cylinder (10). The telescopic end (32) is inserted into the constraint groove. The end of the telescopic end (32) is provided with an extrusion slope that gradually deviates outward from the side close to the lower cylinder (10).

3. A hydraulic breaker according to claim 2, characterized in that, The pressing part (31) is provided with a pressure-bearing expansion member (60) on the side facing the flat pin (40). After the pressure-bearing expansion member (60) is subjected to the outward squeezing force of the flat pin (40), it expands rapidly and drives the two telescopic ends (32) to retract and compress the elastic body (33).

4. A hydraulic breaker according to claim 3, characterized in that, The pressing part (31) has a groove (311) on the side facing the lower cylinder (10). A transmission gear (312) is rotatably installed in the groove (311). One end of the telescopic end (32) extends into the groove (311) and is connected to a moving plate (314). A rack (313) is installed on the moving plate (314). Both racks (313) mesh with the transmission gear (312) and are distributed on both sides of the transmission gear (312). The two ends of the elastomer (33) are respectively connected to the corresponding movable plate (314).

5. A hydraulic breaker according to claim 3, characterized in that, The clamping part (31) is equipped with a battery cell (315) and a control module (316). The battery cell (315) and the control module (316) are electrically connected. The side of the clamping part (31) is provided with an opening groove (317), which is connected to the sink opening (311). The pressure-bearing expansion component (60) includes a resistance strain gauge (61) mounted on one side relative to the flat pin (40) and an air bladder (62) assembled in the clamping part (31). The resistance strain gauge (61) is connected to the control module (316) via a circuit. The air bladder (62) is installed in the opening slot (317). A separator (63) and a resistance wire (64) embedded in the separator (63) are pre-placed in the air bladder (62). The separator (63) divides the air bladder (62) into an internal storage compartment one and an internal storage compartment two. The resistance wire (64) is electrically connected to the control module (316) via a circuit. The clamping part (31) has a port (65) on the side facing the lower cylinder (10), and the port (65) is distributed on both sides of the resistance strain gauge (61).

6. A hydraulic breaker according to claim 5, characterized in that, The opening slot (317) is embedded with a through electrode plate (66), which is electrically connected to the control module (316). The airbag body (62) is provided with an elastic terminal (67) electrically connected to the internal resistance wire (64), which is electrically connected to the through electrode plate (66).

7. A hydraulic breaker according to claim 1, characterized in that, The lower cylinder (10) has a groove (22) on its side and a limiting boss (21) on its side housing (20). The limiting boss (21) and the groove (22) are in corresponding and compatible positions.

8. A hydraulic breaker according to claim 2, characterized in that, The side housing (20) is equipped with four mounting seats (23), each mounting seat (23) is equipped with a hydraulic cylinder (24), the ends of the four hydraulic cylinders (24) are connected to a lifting frame (26), the lifting frame (26) is provided with a support ring (25), the support ring (25) is equipped with a clamping member, the clamping member is used to clamp and fix the drill rod (50).

9. A hydraulic breaker according to claim 8, characterized in that, The clamping component includes a fixed base (28), a clamping body (282) that slides radially along the support ring (25) on the fixed base (28), and a connecting spring (281) installed on the fixed base (28). The connecting spring (281) is installed on the side of the clamping body (282) facing away from the chisel (50). A drive unit (27) is installed on the lower cylinder (10). The drive unit (27) causes the clamping body (282) to approach the drill rod (50). The bottom surface of the drive unit (27) is provided with a slope that is inclined downward along the side away from the drill rod (50), and the top surface of the clamping body (282) is provided with a slope that is inclined upward along the side close to the drill rod (50).

10. A method for assembling a hydraulic breaker as described in claim 9, characterized in that, The steps are as follows: Step 1, Main assembly The side shells (20) are distributed on both sides of the lower cylinder (10) and fastened with bolts to form the main structure; Step 2, Assembly of the drill rod (50) Adjust the axes of the drill rod (50) and the lower cylinder (10) to coincide, and pass the assembly end of the drill rod (50) through the support ring (25) until it partially enters the lower cylinder (10); The piston rod of the hydraulic cylinder (24) drives the lifting frame (26) and the support ring (25) to move closer to the lower cylinder body (10), causing the driving component (27) to act on the clamping body (282) to approach the drill rod (50). The clamping body clamps the flat pin mounting part of the drill rod (50) from both sides, and corrects the angle of the drill rod (50) to correspond to the position of the flat pin mounting part and the flat pin groove along the assembly direction. The piston rod of the hydraulic cylinder (24) drives the lifting frame (26) and the support ring (25) to move away from the lower cylinder (10), and the clamping part and the flat pin clamping part are completely separated. With the chisel (50) held at this angle, insert the entire assembly end into the lower cylinder (10) along the assembly direction; Step 3, assemble one side of the cross pin (30) Before assembling the flat pin (40), install a set of horizontal pins (30) in advance, adjust the operating column (34) to retract the two telescopic ends (32) into the clamping part (31) until it is less than the distance between the two constraint grooves, press the clamping part (31) against the surface of the lower cylinder (10) and release the operating column (34), and the telescopic end (32) enters the constraint groove; Step 4, assembly of flat pin (40) The flat pin (40) is assembled in the flat pin groove, and the force exerted by the flat pin (40) on the clamping part (31) when it contacts the clamping part (31) is less than the set value; Step 5, assemble the other side of the cross pin (30). Adjust the two operating pins (34) on the horizontal pin (30) to retract the two telescopic ends (32) into the clamping part (31) until they are less than the distance between the two constraint grooves. After the clamping part (31) is attached to the surface of the flat pin (40), release the operating pins (34) and the telescopic ends (32) enter the constraint groove.

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