Flat pin assembly structure of hydraulic breaking hammer

Abstract

The utility model discloses a hydraulic breaking hammer flat pin assembly structure which comprises a lower cylinder body flat pin body, a side clamping plate and a transverse pin piece, and a flat pin groove is formed in a lower cylinder body. The flat pin body is installed in the flat pin groove, and the length of the flat pin body is larger than or equal to the depth of the flat pin groove. The two sets of side clamping plates are installed on the left side and the right side of the lower cylinder body correspondingly and connected through connecting bolts, and constraint notches are formed in the side clamping plates. The two ends of the transverse pin piece are both of a retractable structure, and the two ends of the transverse pin piece and the restraining notches are installed in a matched mode and used for limiting the flat pin body in the depth direction of the flat pin groove. The transverse pin piece is assembled from the position between the side clamping plates to the side close to the lower cylinder body through the transverse pin piece, the transverse pin piece is installed in the restraining notch in a matched mode through the retractable end structure of the transverse pin piece, then the end of the flat pin body is limited, the end of the flat pin body is prevented from being restrained in the depth direction of the flat pin groove, and therefore the problem that the end of the flat pin body moves in the flat pin groove to cause a stepped groove is solved.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic breaker technology, specifically a flat pin assembly structure for a hydraulic breaker. Background Technology

[0002] The working principle of a hydraulic breaker is as follows: Powered by pressurized oil output from the hydraulic pump of an excavator or loader, the piston reciprocates through a distribution valve. During the stroke, high-pressure hydraulic oil enters the rear chamber of the breaker's cylinder, and the piston, under the combined action of compressed nitrogen and high-pressure oil in the rear cylinder, impacts the chisel and breaks the rock. During the return stroke, high-pressure oil is connected to the front chamber of the cylinder, pushing the piston backward and compressing the nitrogen in the upper cylinder, thus completing one working cycle. The repeated strokes and returns of the piston cause the chisel to impact and break rocks, stones, concrete, etc.

[0003] Traditional hydraulic breakers typically have their flat pins installed in pin slots, with the pin length being less than or equal to the slot length. Furthermore, the pins are typically side-mounted, which fails to effectively constrain the pin ends after assembly. This leads to a certain amount of displacement within the pin slot. In practical use, this can cause the breaker to misfire, resulting in stepped grooves within the pin slot. These stepped grooves accelerate damage to the pins or the lower cylinder, necessitating a solution to this problem. Utility Model Content

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

[0005] How to solve the problem that traditional flat pin assembly structures are prone to forming stepped grooves in the flat pin slots during actual use, which accelerates the damage to the flat pins or lower cylinder block.

[0006] To solve the above-mentioned technical problems, the inventors of this utility model, through practice and summarization, have derived the technical solution of this utility model, which adopts the following technical solution:

[0007] A flat pin assembly structure for a hydraulic breaker includes:

[0008] The lower cylinder block has a flat pin groove.

[0009] A flat pin is installed in a flat pin groove. The length of the flat pin is greater than or equal to the depth of the flat pin groove. A positioning groove is provided on the end face of the flat pin.

[0010] Side clamps, two sets of side clamps are respectively installed on the left and right sides of the lower cylinder and connected by connecting bolts, and constraint grooves are provided on the side clamps;

[0011] The horizontal pin has retractable structures at both ends. The side of the horizontal pin opposite to the flat pin has a constraint platform corresponding to the position of the positioning groove. The two ends of the horizontal pin are respectively adapted to the constraint slot and the constraint platform is adapted to the positioning groove.

[0012] Preferably, a connecting rope is installed on the cross pin, and a bolt head is connected to the free end of the connecting rope. The bolt head is installed and fixed on the side of the lower cylinder body.

[0013] Preferably, the transverse pin includes a clamping part and two telescopic parts that slide against the clamping part. An operating column is provided on the telescopic part, and the operating column is located on the side of the telescopic part facing away from the lower cylinder. An elastic element is installed inside the clamping part, and the two ends of the elastic element abut against the corresponding ends of the telescopic part. The side of the telescopic part facing away from the lower cylinder gradually approaches the lower cylinder along the direction close to the side clamping plate.

[0014] Preferably, a winch is rotatably mounted on the middle of the side of the clamping part facing away from the lower cylinder body, and a traction rope is wound on the winch. The traction rope has two strands that are respectively connected to the corresponding operating columns.

[0015] Preferably, a guide pin is installed on the lower cylinder body, the guide pin is arranged parallel to the assembly direction of the cross pin, one end of the guide pin is threaded to the lower cylinder body, and a guide hole is provided on the pressing part, with the guide pin and the guide hole slidingly engaged.

[0016] Preferably, the pressing part has a sliding cavity inside, and one end of the telescopic part extends into the sliding cavity;

[0017] A groove is provided on the side of the pressing part facing the lower cylinder. A synchronous gear is rotatably installed in the groove. A transmission rack is meshed on both sides of the synchronous gear. A movable plate is fixed to one end of each of the two transmission racks. The movable plate is slidably fitted in the groove. The ends of the movable plate and the telescopic part are fixed.

[0018] Preferably, both ends of the elastic element are connected to the corresponding movable plates.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This utility model uses a horizontal pin to assemble a horizontal pin from between the side clamps toward the side closer to the lower cylinder body. The horizontal pin is installed in the constraint groove through the retractable end structure of the horizontal pin, thereby restricting the end of the flat pin and preventing the end of the flat pin from being constrained along the depth direction of the flat pin groove. This prevents the flat pin from moving in the flat pin groove and causing the problem of stepped groove.

[0021] 2. When the flat pin of this utility model is damaged, it will apply pressure to the clamping part under the action of the chisel. When the applied pressure is greater than the force of the elastic element, the inclined surface at the end of the telescopic part will act as a constraint groove to overcome the force of the elastic element and complete the inward retraction. When the force reaches the set level, the horizontal pin will automatically fall off (under the basic condition of not being damaged).

[0022] 3. This utility model prevents excessive ejection when the horizontal pin falls off. The connecting rope limits the outward ejection distance of the horizontal pin, thereby ensuring construction safety. Furthermore, it avoids the risk of damage to the horizontal pin when it falls off.

[0023] 4. This utility model is equipped with a winch on the pressing part, which is used to complete the synchronous recovery of both ends. With the guidance of the guide pin and guide hole, even if the flat pin on one side is damaged, the pressing part can be moved outward as a whole through the guide pin, thereby ensuring smooth outward movement and ensuring that the horizontal pin moves parallel and outward without causing damage to the horizontal pin.

[0024] 5. This utility model installs a transmission rack and transmission gear in the groove on the pressing part to realize the synchronous operation of the two telescopic parts, thereby ensuring the uniformity of force at both ends. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0027] Figure 3 This is a cross-section of the horizontal pin component of this utility model. Figure 1 ;

[0028] Figure 4 This is the horizontal cross-section of the flat pin of this utility model. Figure 1 ;

[0029] Figure 5 This is a schematic diagram of the overall structure of the present invention. Figure 3 ;

[0030] Figure 6 This is a cross-section of the horizontal pin component of this utility model. Figure 2 ;

[0031] Figure 7 This is the horizontal cross-section of the flat pin of this utility model. Figure 2 ;

[0032] Figure 8 This is a schematic diagram of the structure of the pressing part of this utility model facing the lower cylinder body;

[0033] Figure 9 This diagram shows the connection relationship between the clamping part and the guide pin of this utility model.

[0034] In the diagram: 10. Lower cylinder body; 11. Guide pin; 20. Flat pin body; 30. Side clamping plate; 31. Constraint groove; 40. Horizontal pin; 41. Connecting rope; 42. Bolt head; 43. Clamping part; 431. Countersunk groove; 432. Synchronous gear; 433. Moving plate; 434. Transmission rack; 44. Telescopic part; 45. Operating column; 46. Traction rope; 47. Elastic element; 48. Winch. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0036] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Example 1

[0038] like Figure 1 As shown, a flat pin assembly structure for a hydraulic breaker includes:

[0039] The lower cylinder body 10 is provided with a flat pin groove.

[0040] Flat pin 20 is installed in flat pin groove. The length of flat pin 20 is greater than or equal to the depth of flat pin groove. A positioning groove is provided on the end face of flat pin 20.

[0041] Side clamping plate 30, the side clamping plate 30 is provided with two sets respectively installed on the left and right sides of the lower cylinder 10 and connected by connecting bolts, and the side clamping plate 30 is provided with a constraint groove 31.

[0042] The horizontal pin 40 has retractable structures at both ends. The horizontal pin 40 has a constraint platform on one side relative to the flat pin 20 that corresponds to the position of the positioning groove. The two ends of the horizontal pin 40 are respectively adapted to the corresponding constraint slots 31 and the constraint platform is adapted to the positioning groove.

[0043] After assembling the lower cylinder body 10 and the side clamping plate 30, first install the transverse pin 40 on one side into the corresponding constraint groove 31, install the chisel into the cylinder liner of the lower cylinder body 10, and then install the flat pin 20 into the flat pin groove, so that one end abuts against the transverse pin 40 (the constraint platform and positioning groove on this side are adapted for installation), and the other end is flush with or protrudes outward to a certain extent from the flat pin groove. Then install the transverse pin 40 on the other side into the constraint groove 31, with the constraint platform and positioning groove adapted for installation, thereby completing the constraint and restriction of the flat pin 20. During actual crushing, the flat pin 20 will not move in the depth direction of the flat pin groove, thus solving the problem of easily forming stepped grooves in the flat pin groove. The adaptation of the constraint platform and positioning groove can prevent the flat pin 20 from moving relative to the end face of the transverse pin 40, reducing wear.

[0044] Example 2

[0045] Based on Example 1, such as Figure 2 As shown, a connecting rope 41 is installed on the horizontal pin 40, and a bolt head 42 is connected to the free end of the connecting rope 41. The bolt head 42 is installed and fixed on the side of the lower cylinder body 10.

[0046] like Figure 3 , Figure 4 As shown, the horizontal pin 40 includes a pressing part 43 and two telescopic parts 44 that slide against the pressing part 43. An operating post 45 is provided on the telescopic part 44. The operating post 45 is located on the side of the telescopic part 44 facing away from the lower cylinder 10. An elastic element 47 is installed inside the pressing part 43. The elastic element 47 is installed between the two ends of the telescopic parts 44 facing each other. The side of the telescopic part 44 facing away from the lower cylinder 10 gradually approaches the lower cylinder 10 along the direction close to the side clamping plate 30.

[0047] By gradually reducing the thickness at the end of the telescopic part 44 and tilting it at an angle between 45° and 70°, pressure is applied to the end of the flat pin 20 while it is being fitted and installed in accordance with the constraint groove 31. This ensures that the flat pin 20 remains stable within the groove. If the flat pin 20 is damaged, it moves towards the groove opening under the action of the chisel and acts on the clamping part 43. Depending on the slope of the end of the telescopic part 44 and the specifications of the elastic element 47, it can automatically move outward and detach under a certain degree of pressure. Since the degree of damage to the flat pin 20 is uncertain, a large degree of damage can easily cause the horizontal pin 40 to spring outward, which can easily lead to safety accidents. The connecting rope 41 can limit the distance of its outward spring.

[0048] Example 3

[0049] Based on Example 2, such as Figure 5 and Figure 6 , Figure 9As shown, a winch 48 is rotatably mounted on the middle of the side of the clamping part 43 facing away from the lower cylinder 10. A traction rope 46 is wound around the winch 48, and two traction ropes 46 are respectively connected to the corresponding operating columns 45. By rotating the winch 48, the two traction ropes 46 can be synchronously wound or released, thereby controlling the synchronous inward or outward movement of the telescopic part 44, which facilitates operation.

[0050] Example 4

[0051] Based on Embodiment 3, in order to solve the problem that wear occurs on one side of the flat pin 20 and the other side does not apply pressure to the clamping part 43, which easily causes bending deformation of the horizontal pin 40, the inventors made the following improvements:

[0052] like Figure 5 , Figure 9 As shown, a guide pin 11 is installed on the lower cylinder body 10. The guide pin 11 is arranged parallel to the assembly direction of the cross pin 40. One end of the guide pin 11 is threaded to the lower cylinder body 10. A guide hole is provided on the pressing part 43. The guide pin 11 and the guide hole are slidably engaged.

[0053] By cooperating with the guide pin 11 and the guide hole, when the flat pin 20 on one side wears out, the pressing part 43 will only move outward, without causing the pressing part 43 to twist and deform while moving outward, thus ensuring the structural stability and reusability of the horizontal pin 40.

[0054] Example 5

[0055] Based on Example 4, such as Figure 6 As shown, the pressing part 43 has a sliding cavity inside, and one end of the telescopic part 44 extends into the sliding cavity;

[0056] like Figure 8 As shown, a groove 431 is provided on the side of the pressing part 43 facing the lower cylinder 10. A synchronous gear 432 is rotatably installed in the groove 431. A transmission rack 434 is meshed on both sides of the synchronous gear 432. A movable plate 433 is fixed to one end of each of the two transmission racks 434. The movable plate 433 is slidably fitted in the groove 431. The ends of the movable plate 433 and the telescopic part 44 are fixed.

[0057] The two ends of the elastic element 47 are respectively connected to the corresponding movable plate 433.

[0058] If one side of the flat pin 20 is worn, the other side will not apply pressure to the clamping part 43. At the same time, the synchronous movement of the structure is achieved by using the two telescopic parts 44 to reduce the resistance between the guide pin 11 and the guide hole.

[0059] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model 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 based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A hydraulic breaking hammer quill assembly structure, characterized by, The utility model relates to a kind of cylinder locking device, including: Lower cylinder (10), flat pin slot is provided on lower cylinder (10); Flat pin body (20), flat pin body (20) is installed in flat pin slot, the length of flat pin body (20) is greater than or equal to the depth of flat pin slot, and positioning groove is provided on the end face of flat pin body (20); Side clamping plate (30), side clamping plate (30) is provided with two groups of left and right sides of lower cylinder (10) and is connected by connecting bolt, and side clamping plate (30) is provided with constraint notch (31); Cross pin piece (40), both ends of cross pin piece (40) are collapsible structure, and cross pin piece (40) is provided with constraint mesa corresponding with the position of positioning groove on the side opposite to flat pin body (20), and cross pin piece (40) is installed with corresponding constraint notch (31) respectively, and constraint mesa and positioning groove are installed adaptively.

2. The hydraulic breaking hammer quill assembly of claim 1, wherein, Connecting rope (41) is installed on the cross pin piece (40), the free end of connecting rope (41) is connected with bolt head (42), and bolt head (42) is installed and fixed on the side of lower cylinder (10).

3. The hydraulic breaking hammer quill assembly of claim 1 or 2, wherein, The cross pin piece (40) includes compression part (43) and two telescopic parts (44) slidably fitted with respect to the compression part (43), the telescopic part (44) is provided with operating column (45), the operating column (45) is located on the side of the telescopic part (44) away from the lower cylinder (10), the elastic member (47) is installed in the compression part (43), the elastic member (47) is installed between the side end portions of the two telescopic parts (44) facing each other, and the side of the telescopic part (44) away from the lower cylinder (10) gradually approaches the lower cylinder (10) in the direction close to the side clamping plate (30).

4. The hydraulic breaking hammer quill assembly of claim 3, wherein, The middle part of the side of the compression part (43) away from the lower cylinder (10) is rotatably installed with winch (48), the winch (48) is wound with traction rope (46), and the traction rope (46) is provided with two roots connected with corresponding operating column (45).

5. The hydraulic breaking hammer quill assembly of claim 4, wherein, The lower cylinder (10) is provided with guide pin (11), the guide pin (11) is arranged in parallel with the assembly direction of the cross pin piece (40), one end of the guide pin (11) is threadedly connected to the lower cylinder (10), the compression part (43) is provided with guide hole, and the guide pin (11) and the guide hole are slidably fitted.

6. The hydraulic breaking hammer quill assembly of claim 5, wherein, The inside of the compression part (43) is provided with sliding cavity, and one end of the telescopic part (44) extends into the sliding cavity; The side of the compression part (43) facing the lower cylinder (10) is provided with sunken notch (431), the sunken notch (431) is rotatably installed with synchronous gear (432), the two sides of the synchronous gear (432) are respectively engaged with transmission rack (434), one end of the two transmission racks (434) is fixed with moving plate (433), the moving plate (433) is slidably fitted in the sunken notch (431), and the moving plate (433) and the end of the telescopic part (44) are fixed.

7. The hydraulic breaking hammer quill assembly of claim 6, wherein, The two ends of the elastic member (47) are respectively connected with corresponding moving plate (433).

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