A breaker hammer with vibration reduction principle

Abstract

The present invention discloses a breaker hammer with a novel vibration reduction principle, comprising a rectangular frame platform, a first mass block and a second mass block, the eccentric mass of the first eccentric block is greater than that of the second eccentric block, the eccentric distances of the first eccentric block and the second eccentric block are the same and the phase angles differ by 180°; the first mass block is placed on the upper surface of the upper platform, the second mass block is located above the upper platform, the second mass block is connected to the corresponding four second eccentric blocks through a second crank, the first mass block is connected to the connecting rods between the first eccentric blocks opposite to each other in the two eccentric groups through two first cranks respectively; a through hole is provided on the second mass block for the first mass block to pass through. The present invention reduces the loss of structures such as air springs and increases the benefits; the dust cover only plays a dustproof role, and no longer needs to absorb the transmitted energy due to the connection with the spring, causing structural damage; the working state depends on whether there is external pressure acting on the breaker hammer head, avoiding empty hitting and energy loss, and reducing noise.

Description

Technical Field

[0001] The invention relates to a demolition device, in particular to a breaker hammer with a novel vibration reduction principle. Background Art

[0002] Breakers are commonly used tools in building demolition and mining. Currently, vibrating breakers that use several eccentric blocks to rotate in opposite directions to cause vertical forces to be superimposed and horizontal forces to be offset are highly favored in the demolition industry due to their advantages such as high efficiency and low noise. However, (1) due to the large vertical force of this type of breaker, the air springs, metal springs and composite springs currently used in this type of breaker always have problems such as severe spring consumption or incomplete vibration reduction causing structural damage. The reason is that no matter what kind of spring is used, the installation form and vibration reduction principle of the spring are basically the same, that is, the deformation of the spring between the breaker box and the vibration structure is relied on to absorb energy, which causes the above problems; (2) since this type of breaker does not have the function of automatically adjusting the flow rate, it always uses the same exciting force when breaking different objects, resulting in energy waste, high noise and easy empty hitting, which causes machine damage. Summary of the invention

[0003] In view of the above-mentioned shortcomings and deficiencies in the prior art, an object of the present invention is to provide a breaker hammer with a novel vibration reduction principle which is not easy to be damaged.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A breaker hammer with a novel vibration reduction principle comprises a rectangular frame platform, a first mass block and a second mass block, the rectangular frame platform comprises an upper platform and a lower platform, the upper platform and the lower platform are fixedly connected to form a rectangular frame structure by four connecting plates located at four corners of the opposite surfaces of the upper platform and the lower platform, a connecting shaft is passed through the midpoint of each connecting plate, a first eccentric block and a second eccentric block are respectively installed at both ends of the connecting shaft, the first eccentric block is located inside the rectangular frame structure, the second eccentric block is located outside the rectangular frame structure, and the two opposite first eccentric blocks are fixedly connected by a connecting rod; the two connecting rods with coincident axes are connected to each other by a connecting rod; The two first eccentric blocks and the second eccentric blocks corresponding to the shaft form an eccentric group, and the two eccentric groups have the same rotation speed and opposite direction; the eccentric mass of the first eccentric block is greater than that of the second eccentric block, the eccentric distances of the first eccentric block and the second eccentric block are the same, and the phase angles differ by 180°; the first mass block is placed on the upper surface of the upper platform, the second mass block is located above the upper platform, the second mass block is connected to the corresponding four second eccentric blocks through the second crank, and the first mass block is connected to the connecting rods between the opposite first eccentric blocks in the two eccentric groups through the two first cranks; the second mass block is provided with a through hole for the first mass block to pass through.

[0006] Preferably, a main shaft is connected between the center points of the opposing surfaces of the upper platform and the lower platform.

[0007] Preferably, a horizontal mounting hole is opened on the main shaft, and the mounting hole is a rectangular hole, in which a vibration sensor is installed.

[0008] Preferably, the connecting plate includes an upper connecting plate and a lower connecting plate, the upper connecting plate is fixedly connected to the upper platform, the connecting plate is fixedly connected to the lower platform, the upper connecting plate and the lower connecting plate are partially overlapped, and through holes are opened at the overlapping position, and the connecting shaft passes through the through holes on the upper connecting plate and the lower connecting plate in turn to respectively connect the first eccentric block and the second eccentric block.

[0009] Preferably, a lifting lug is provided on the upper surface of the upper platform, and two lug plates of the lifting lug extend along the length direction of the upper platform and are symmetrically distributed.

[0010] Preferably, the main shaft is rectangular, the length direction of the rectangular hole is the same as the length direction of the rectangular main shaft, and the penetration direction of the rectangular hole is the same as the axial direction of the transmission shaft.

[0011] Preferably, hydraulic motors are installed on both sides of the main shaft, the axes of the two hydraulic motors coincide, a driving wheel is installed on the output shaft of the hydraulic motor, a transmission wheel is installed on the connecting shafts located on both sides of the hydraulic motor, the transmission wheel and the driving wheel are driven by a transmission belt, and reversing wheels are arranged on the upper and lower sides of the transmission wheel located on either side of the hydraulic motor, and the directions of the transmission wheels on both sides are reversed by the reversing wheels.

[0012] Preferably, the two hydraulic motors are respectively mounted on both sides of the main shaft through mounting plates, and the rectangular hole is sealed by the mounting plates.

[0013] Preferably, the second mass block is provided with a clearance hole corresponding to the lifting ear.

[0014] Preferably, it also includes a dust cover, which is fixed on the lower platform. The dust cover is provided with avoidance holes for the lifting ears to pass through and corresponding to the swinging tracks of the first eccentric block and the second eccentric block.

[0015] Compared with the prior art, the embodiments of the present invention have at least the following advantages:

[0016] (1) Innovation in vibration reduction principle: a new vibration reduction mechanism was designed based on the momentum theorem;

[0017] (2) Using vibration sensors combined with deformation-sensitive materials to intelligently control motor flow;

[0018] (3) Structural innovation: installing the lifting lugs on a fixed platform to prevent energy from being transferred to the vibrating box or dust cover and causing damage.

[0019] Based on the above advantages, the loss of structures such as air springs is reduced and the benefits are increased; the dust cover only plays a dust-proof role and no longer needs to absorb the transmitted energy due to the connection with the spring to cause structural damage; the working state depends on whether there is external pressure acting on the crushing hammer head, which avoids empty hitting and energy loss and reduces noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of a breaker hammer with a new vibration reduction principle;

[0021] Figure 2 This is a schematic diagram of the structure of a breaker with a new vibration reduction principle after removing the dust cover;

[0022] Figure 3 A schematic diagram showing the location of the rectangular hole and vibration sensor;

[0023] Figure 4 for Figure 2 Side view of

[0024] Figure 5 A structural diagram showing a working condition of a breaker;

[0025] Figure 6 A schematic diagram showing the structure of another working condition of the breaker;

[0026] Figure 7 for Figure 3 A partial enlarged view of point A in the middle.

[0027] Figure numerals: 1. first mass block; 2. second mass block; 3. first eccentric block; 4. second eccentric block; 5. upper platform; 6. lower platform; 7. upper connecting plate; 8. lower connecting plate; 9. connecting shaft; 10. rectangular hole; 11. hydraulic motor; 12. transmission wheel; 13. reversing wheel; 14. driving wheel; 15. lifting ear; 16. vibration sensor; 17. first crank; 18. second crank; 19. breaking hammer head; 20. dust cover; 21. main shaft; 22. mounting plate. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 The present invention is further described in detail with reference to the following examples. The following examples are merely illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0029] A breaker hammer with a novel vibration reduction principle comprises a rectangular frame platform, a first mass block 1 and a second mass block 2. The rectangular frame platform comprises an upper platform 5 and a lower platform 6. The upper platform 5 and the lower platform 6 are fixedly connected to form a rectangular frame structure through four connecting plates located at four corners of the opposite surfaces of the upper platform 5 and the lower platform 6. A breaker hammer head 19 is arranged at the center position below the rectangular frame structure. A connecting shaft 9 is passed through the midpoint of each connecting plate. The first eccentric block 3 and the second eccentric block 4 are respectively installed at both ends of the connecting shaft 9. The first eccentric block 3 is located inside the rectangular frame structure, and the second eccentric block 4 is located outside the rectangular frame structure. The two opposite first eccentric blocks 3 are fixedly connected by a connecting rod. The two first eccentric blocks 3 and the second eccentric blocks 4 corresponding to the two connecting shafts 9 with overlapping axes form an eccentric group. The two eccentric groups have the same rotation speed and opposite rotation direction. The eccentric mass of the first eccentric block 3 is greater than that of the second eccentric block 4. The eccentric distances of the first eccentric block 3 and the second eccentric block 4 are the same and the phase angles differ by 180°. The first mass block 1 is placed on the upper surface of the upper platform 5, the second mass block 2 is located above the upper platform 5, the second mass block 2 is connected to the corresponding four second eccentric blocks 4 through the second crank 18, and the first mass block 1 is connected to the connecting rods between the opposite first eccentric blocks 3 in the two eccentric groups through the two first cranks 17; the second mass block 2 is provided with a through hole for the first mass block 1 to pass through.

[0030] A rectangular main shaft 21 is connected between the center points of the opposite surfaces of the upper platform 5 and the lower platform 6. A horizontal mounting hole is opened on the main shaft 21, and the mounting hole is a rectangular hole 10. A vibration sensor 16 is installed in the rectangular hole 10.

[0031] In order to avoid the transmission of vibration on the main shaft 21, the connecting plate is processed into two parts, an upper connecting plate 7 and a lower connecting plate 8. The upper connecting plate 7 is fixedly connected to the upper platform 5, and the connecting plate is fixedly connected to the lower platform 6. The upper connecting plate 7 and the lower connecting plate 8 are partially overlapped, and a through hole is opened at the overlapping position. The connecting shaft 9 passes through the through holes on the upper connecting plate 7 and the lower connecting plate 8 in turn to connect the first eccentric block 3 and the second eccentric block 4 respectively.

[0032] In order to facilitate the installation of the breaker and the mechanical arm, a lifting lug 15 is provided on the upper surface of the upper platform 5 , and two ear plates of the lifting lug 15 extend along the length direction of the upper platform 5 and are symmetrically distributed.

[0033] In order to better collect the minute deformation of the main shaft 21 , the length direction of the rectangular hole 10 is the same as the length direction of the rectangular main shaft 21 , and the penetration direction of the rectangular hole 10 is the same as the axial direction of the transmission shaft.

[0034] Hydraulic motors 11 are installed on both sides of the main shaft 21, and the axes of the two hydraulic motors 11 coincide. A driving wheel 14 is installed on the output shaft of the hydraulic motor 11. Transmission wheels 12 are installed on the connecting shafts 9 located on both sides of the hydraulic motor 11. The transmission wheel 12 and the driving wheel 14 are located in the same plane and are driven by a transmission belt. Reversing wheels 13 are arranged on the upper and lower sides of the transmission wheel 12 located on either side of the hydraulic motor 11, and the directions of the transmission wheels 12 on both sides are reversed by the reversing wheels 13.

[0035] The two hydraulic motors 11 are respectively mounted on both sides of the main shaft 21 through mounting plates 22 , and the rectangular hole 10 is sealed by the mounting plates 22 .

[0036] The second mass block 2 is provided with a clearance hole corresponding to the lifting ear 15 .

[0037] The dust cover 20 is fixed on the second mass block 2 , and the dust cover 20 is provided with avoidance holes for the lifting ears 15 to pass through and corresponding to the swinging tracks of the first eccentric block 3 and the second eccentric block 4 .

[0038] Working principle: After the crushing machine is connected to the lifting lug 15, the crushing hammer head 19 is pressed on the rock or concrete. Due to the squeezing of the crushed object and the crushing machine, the main shaft 21 will produce a slight deformation, and then the vibration sensor 16 (deformation-sensitive thin shaft) installed in the rectangular hole 10 of the main shaft 21 will produce a slight deformation. After the vibration sensor 16 captures the signal, it feeds back to the hydraulic valve of the hydraulic motor 11. At this time, the hydraulic valve core moves the hydraulic oil into the motor cavity, driving the hydraulic motor 11 to rotate, and then drives the driving wheels 12 on both sides to rotate synchronously in the opposite direction through the driving wheel 14, thereby driving the first eccentric block 3 and the second eccentric block 4 to rotate. At this time, since the first eccentric block 3 and the second eccentric block 4 in the two eccentric groups are symmetrically arranged, the vertical force will be superimposed and the horizontal force will be offset. Although the first eccentric block 3 and the second eccentric block 4 have different sizes and masses, they have the same eccentricity, which ensures that the Y-direction (vertical direction) speeds of the cranks connected to the first eccentric block 3 and the second eccentric block 4 are always the same in magnitude and opposite in direction during the rotation process; that is, the Y-direction speeds of the first mass block 1 and the second mass block 2 are the same in magnitude and opposite in direction. When the first eccentric block 3 rotates to the lowest position (corresponding to Figure 5), at this time, a downward momentum P1=M / 1V / 1 will be generated to act on the object to be crushed. At this moment, the object to be crushed has an equal and opposite momentum P2 on the crushing hammer head 19, that is, P2 is in the upward direction. The momentum is transmitted to the upper platform 5 through the lower platform 6, the main shaft 21 and the connecting plate. At this time, the first mass block 1 has a downward speed. If the first mass block 1 has the same mass as the lower vibration structure, then P3=M / 3V / 3=-P2. At this time, when the upper platform 5 and the first mass block 1 contact, the momentum is offset, and dP / dt=F. At this time, there will be no more force propagating in the structure, avoiding the energy transfer to the vibration box to destroy it. When the first eccentric block 3 rotates to the highest position (corresponding to Figure 6 ) The lower vibrating body generates an upward momentum P4, and the momentum P5=-P4 generated by the second mass block 2 with a downward velocity will also make the resultant force zero and no vibration will be transmitted to other structures; after the crushed object is broken, the crushing hammer head 19 is no longer subjected to force, and the vibration sensor 16 (deformation-sensitive thin shaft) will return to its original state. At this time, the vibration sensor 16 transmits a signal to the hydraulic valve, and the hydraulic valve core moves to control the flow to stop the hydraulic motor 11 from rotating, thereby avoiding the occurrence of the crushing hammer hitting in vain; since the lifting ear 15 is installed on the upper platform 5 with a fixed position, and there is no need to install a traditional spring, damage to the vibration box or the dust cover 20 caused by the crushing vibration is avoided.

[0039] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A breaker hammer with vibration reduction principle, characterized in that: The invention comprises a rectangular frame platform, a first mass block and a second mass block, wherein the rectangular frame platform comprises an upper platform and a lower platform, and the upper platform and the lower platform are fixedly connected by four connecting plates located at four corners of opposite surfaces of the upper platform and the lower platform to form a rectangular frame structure, a connecting shaft is passed through the midpoint of each connecting plate, and a first eccentric block and a second eccentric block are respectively installed at both ends of the connecting shaft, the first eccentric block is located inside the rectangular frame structure, and the second eccentric block is located outside the rectangular frame structure, and the two opposite first eccentric blocks are fixedly connected by a connecting rod; the two first eccentric blocks and the second eccentric blocks corresponding to the two connecting shafts with coincident axes form an eccentric group, and the rotation speeds of the two eccentric groups are the same and the directions are opposite; the eccentric mass of the first eccentric block is greater than that of the second eccentric block, and the first The eccentricity of the eccentric block and the second eccentric block is the same and the phase angle difference is 180°; the first mass block is placed on the upper surface of the upper platform, the second mass block is located above the upper platform, the second mass block is connected to the corresponding four second eccentric blocks through the second crank, and the first mass block is connected to the connecting rod between the opposite first eccentric blocks in the two eccentric groups through the two first cranks respectively; the second mass block is provided with a through hole for the first mass block to pass through; a main shaft is connected between the center points of the opposite surfaces of the upper platform and the lower platform; a horizontal mounting hole is provided on the main shaft, the mounting hole is a rectangular hole, and a vibration sensor is installed in the rectangular hole; a lifting ear is provided on the upper surface of the upper platform, and the two ear plates of the lifting ear extend along the length direction of the upper platform and are symmetrically distributed.

2. The breaker hammer with vibration reduction principle according to claim 1, characterized in that: The connecting plate includes an upper connecting plate and a lower connecting plate, the upper connecting plate is fixedly connected to the upper platform, the connecting plate is fixedly connected to the lower platform, the upper connecting plate and the lower connecting plate are partially overlapped, through holes are opened at the overlapping positions, and the connecting shaft passes through the through holes on the upper connecting plate and the lower connecting plate in sequence to respectively connect the first eccentric block and the second eccentric block.

3. The breaker hammer with vibration reduction principle according to claim 1, characterized in that: The main shaft is rectangular, the length direction of the rectangular hole is the same as the length direction of the rectangular main shaft, and the penetration direction of the rectangular hole is the same as the axial direction of the transmission shaft.

4. The breaker hammer with vibration reduction principle according to claim 3 is characterized in that: Hydraulic motors are installed on both sides of the main shaft, and the axes of the two hydraulic motors coincide. A driving wheel is installed on the output shaft of the hydraulic motor, and a transmission wheel is installed on the connecting shafts located on both sides of the hydraulic motor. The transmission wheel and the driving wheel are driven by a transmission belt. Reversing wheels are arranged on the upper and lower sides of the transmission wheel located on either side of the hydraulic motor, and the directions of the transmission wheels on both sides are reversed by the reversing wheels.

5. The breaker hammer with vibration reduction principle according to claim 4, characterized in that: The two hydraulic motors are respectively mounted on both sides of the main shaft through mounting plates, and the rectangular hole is sealed by the mounting plates.

6. The breaker hammer with vibration reduction principle according to claim 1, characterized in that: The second mass block is provided with a clearance hole corresponding to the lifting ear.

7. The breaker hammer with vibration reduction principle according to claim 6, characterized in that: It also includes a dust cover, which is fixed on the lower platform. The dust cover is provided with avoidance holes for the lifting ears to pass through and corresponding to the swinging tracks of the first eccentric block and the second eccentric block.

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