CN211621762U

CN211621762U - Nut mounting structure of hydraulic breaking hammer

Info

Publication number: CN211621762U
Application number: CN201922427749.5U
Authority: CN
Inventors: 林雨才
Original assignee: Taizhou Belite Machinery Co ltd
Current assignee: Taizhou Belite Machinery Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-10-02
Anticipated expiration: 2029-12-30

Abstract

The utility model provides a nut mounting structure of hydraulic crushing hammer belongs to quartering hammer technical field. It has solved the easy not hard up problem of current nut. This nut mounting structure of hydraulic breaking hammer, including preceding cylinder body, well cylinder body, back cylinder body and lead screw, the lead screw is worn to establish in the front on cylinder body, well cylinder body and the back cylinder body to cylinder body, rear end stretch out the back cylinder body before the front end of lead screw stretches out, the front end spiro union of lead screw has the nut, and this nut mounting structure is including cup jointing the gasket and the spiro union at the lead screw rear end at the nut, the gasket is located between back cylinder body and the nut, and the rear end of gasket has the back circular conical surface, the osculum of back circular conical surface is towards the nut, the front end of nut has preceding circular conical surface, the macrostoma of preceding circular conical surface is towards the gasket, preceding circular conical surface pastes with the back circular conical surface and leans on. This structure improves the locking performance of nut when reducing the fracture risk of the first tooth of nut.

Description

Nut mounting structure of hydraulic breaking hammer

Technical Field

The utility model belongs to the technical field of the quartering hammer, a hydraulic pressure quartering hammer, especially a nut mounting structure of hydraulic pressure quartering hammer is related to.

Background

The hydraulic breaking hammer is a machine tool capable of converting hydraulic energy into mechanical energy so as to apply work to the outside, is mainly used for breaking, dismantling, excavating hard layers and the like, and is usually installed on an excavator, a loader or a power station for use. The hydraulic breaking hammer comprises a front cylinder body, a middle cylinder body, a rear cylinder body, a drill rod arranged in the front cylinder body and pistons arranged in the middle cylinder body and the rear cylinder body, wherein the front cylinder body, the middle cylinder body and the rear cylinder body are connected through four connecting rods, the four connecting rods sequentially penetrate through the front cylinder body, the middle cylinder body and the rear cylinder body, and nuts are arranged at two ends of each connecting rod, so that the front cylinder body, the middle cylinder body and the rear cylinder body are tightly attached to each other.

For example, chinese patent web discloses a hydraulic quartering hammer [ CN206829288U ], including a cylinder body, a valve body, a drill rod and a piston, the piston is fitted in the cylinder body, the drill rod is fitted with the piston, the valve body is fixed on the cylinder body, the cylinder body includes a front cylinder body, a middle cylinder body and a rear cylinder body, the front cylinder body, the middle cylinder body and the rear cylinder body are sequentially arranged, the front cylinder body, the middle cylinder body and the rear cylinder body are correspondingly provided with connecting holes, the connecting device includes a connecting rod and locking nuts threadedly connected to both ends of the connecting rod, the connecting rod sequentially penetrates through the front cylinder body, the middle cylinder body and the rear cylinder body, and is locked by the locking nuts, so that the front cylinder body, the middle cylinder body and the.

The locking nut is easy to loosen under the vibration working condition because the breaking hammer can vibrate violently in the using process; the first tooth of the nut on the breaking hammer bears 50% of force, the second tooth bears 25% of force, the force borne by the screw tooth on the nut is analogized by analogy, a flat pin is arranged on a front cylinder body of the breaking hammer, when a piston strikes a drill rod, the drill rod moves forwards, the flat pin limits the forward movement of the drill rod, when the drill rod abuts against the flat pin, the drill rod moves forwards to a limit position, at the moment, after the flat pin is impacted by the drill rod, the front cylinder body bears forward tensile force, further, locking nuts at two ends of a connecting rod also bear outward tensile force along the axial direction, the locking nuts are easy to loosen and the connecting rod is easy to stretch, after any one of the connecting rods is stretched or the locking nuts are loosened, the first tooth positions of other nuts bear 50% of force, the first tooth is easy to break, and after the first tooth of the nut breaks, the first tooth of the front cylinder body, the second tooth and the drill rod, The connecting structure of the middle cylinder body and the rear cylinder body is broken, so that the front cylinder body, the middle cylinder body and the rear cylinder body cannot be attached to each other, and the front cylinder body, the middle cylinder body and the rear cylinder body are easy to strain or even scrap.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a nut mounting structure of hydraulic breaking hammer, the utility model aims to solve the technical problem that: how to reduce the fracture risk of the first tooth of the nut and improve the anti-loosening performance of the nut at the same time.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a nut mounting structure of hydraulic breaking hammer, hydraulic breaking hammer includes preceding cylinder body, well cylinder body, back cylinder body and lead screw, the lead screw is worn to establish on preceding cylinder body, well cylinder body and back cylinder body to the front end of lead screw stretches out preceding cylinder body, the rear end stretches out the back cylinder body, the front end spiro union of lead screw has the nut, this nut mounting structure is including cup jointing the gasket and the spiro union at the lead screw rear end, the gasket is located between back cylinder body and the nut, its characterized in that, the rear end of gasket has the back conical surface, the osculum of back conical surface is towards the nut, the front end of nut has preceding conical surface, the macrostoma of preceding conical surface is towards the gasket, preceding conical surface pastes with the back conical surface and leans on mutually.

The nut is tightly attached to the front cylinder body, the gasket is tightly pressed on the rear cylinder body by the nut, the rear conical surface is attached to the front conical surface in the screwing process of the nut, the rear conical surface slightly outwards supports the front conical surface along with the screwing of the nut, the rear end of an inner orifice of the nut is slightly enlarged, the force borne by the first teeth of the nut is reduced, the force borne by the nut is uniformly transferred from the first teeth to the last teeth, the nut is not easy to break at the positions of the first teeth, the risk of loosening of the nut is reduced, the contact area between the nut and the gasket is increased by the structure that the rear conical surface is attached to the front conical surface, the friction force between the nut and the gasket is improved, the risk of loosening of the nut is further reduced, the front cylinder body, the middle cylinder body and the rear cylinder body are tightly attached to each other, and the stability of the breaking hammer in the working process is improved.

In the above nut mounting structure for a hydraulic breaker, an inner side wall of a front end of the nut has a chamfer. After the chamfer is arranged, the inner hole opening at the rear end of the nut is horn-shaped, so that the rear end of the nut is easy to deform, and the gasket can be guaranteed to be outwards stretched by the rear conical surface of the inner hole opening of the nut.

In the above nut mounting structure of the hydraulic breaking hammer, the rear end surface of the screw rod is provided with the cylinder, the rear end of the nut is provided with the positioning portion sleeved on the cylinder, the outer peripheral surface of the positioning portion is provided with the threaded hole along the radial direction of the positioning portion, and the threaded hole is screwed with the screw. Through the setting of this structure, the screw is inwards screwed and is made the tip of screw support by on the outer peripheral face of location portion, carries out radial locking to the nut, further improves the locking performance of nut.

In the nut mounting structure of the hydraulic breaking hammer, the hole wall at the inner end of the threaded hole is provided with the annular boss, the threaded hole is internally provided with the steel ball, the diameter of the steel ball is larger than the inner diameter of the boss, and when the steel ball abuts against the boss, the steel ball abuts against the outer peripheral surface of the cylinder. Through the arrangement of the structure, the end part of the screw directly abuts against the positioning part, and the end part of the screw rubs against the positioning part in the screwing process, so that the end part of the screw and the peripheral surface of the positioning part are abraded; after the steel ball is arranged in the threaded hole, the end part of the screw abuts against the steel ball, so that the steel ball is tightly pressed on the positioning part, the steel ball and the positioning part are in point contact, and the condition that the end part of the screw and the peripheral surface of the positioning part are abraded is avoided. When the nut needs to be detached from the screw rod, the screw is screwed out for a certain distance, the locking of the positioning portion by the steel balls is released, the nut is screwed out from the screw rod, the steel balls are limited by the end portion of the screw to move outwards in the process of rotating the nut, and the arrangement of the boss prevents the steel balls from falling from the inner end of the threaded hole.

In the above nut mounting structure for a hydraulic breaker, the threaded hole has a plurality of threaded holes, and the plurality of threaded holes are arranged along the circumferential direction of the positioning portion. Through the setting of this structure, through setting up behind a plurality of screw holes, increased the number of screw, realize the nut in the radial multiple spot location, improve the locking performance of nut.

In the nut mounting structure of the hydraulic breaking hammer, the rear end face of the rear cylinder body is provided with a first through mounting hole, the first mounting hole is a counter bore, the screw rod is arranged in the first mounting hole in a penetrating mode, and the front end face of the gasket is provided with a step inserted into the counter bore. Through the arrangement of the structure, the insertion fit of the step and the counter bore plays the effects of positioning and automatic alignment on the gasket, and the front conical surface and the rear conical surface are aligned conveniently.

In foretell nut mounting structure of hydraulic breaking hammer, set up the mounting hole two that link up on the preceding terminal surface of preceding cylinder body, mounting hole two is the counter bore, the lead screw is worn to establish in mounting hole two, the rear end face of nut has and is annular boss, the boss inserts and leans on with the pore wall counterbalance of counter bore in the counter bore. Preceding cylinder body, well cylinder body and back cylinder body are at the in-process of assembly, the nut screws the back and leans on with the lateral wall counterbalance of preceding cylinder body, at the in-process of the nut of screwing, and the nut makes the trend of nut to one side removal under the extrusion that receives preceding cylinder body lateral wall, and then make the lead screw receive radial stress, the lead screw takes place to buckle easily and has cracked risk, setting through this structure, the location to the nut is realized with the grafting structure of counter bore to the boss, make the nut receive under the extruded condition, the stress point is located the pore wall of boss and counter bore, avoid the lead screw to receive radial stress, play the effect of protection lead screw.

Compared with the prior art, the utility model discloses a hydraulic breaking hammer's nut mounting structure has following advantage:

1. this structure is along with screwing of nut, and the back conical surface is slightly outwards propped preceding conical surface for the rear end in the interior drill way of nut is propped greatly slightly, reduces the power of the first tooth of nut, makes the even transition of the power of bearing of nut from first tooth to last tooth, makes the nut be difficult to the fracture take place in first tooth position, reduces the not hard up risk of nut.

2. This structure has increased the area of contact between nut and the gasket, has improved the frictional force between nut and the gasket, further reduces the not hard up risk of nut for preceding cylinder body, well cylinder body and the inseparable laminating of back cylinder body have improved the stability of quartering hammer during operation.

Drawings

Fig. 1 is a schematic sectional structure of the present invention.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is an enlarged schematic view of a portion B in fig. 1.

In the figure, 1, a front cylinder body; 11. a second mounting hole; 2. a middle cylinder body; 3. a rear cylinder body; 31. a first mounting hole; 4. a screw rod; 41. a cylinder; 5. a nut; 51. a boss; 6. a gasket; 61. a front conical surface; 62. a step; 7. a nut; 71. a rear conical surface; 72. chamfering; 73. a positioning part; 731. a threaded hole; 732. a boss; 8. a screw; 9. and (5) steel balls.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the hydraulic breaking hammer includes a front cylinder 1, a middle cylinder 2, a rear cylinder 3 and a lead screw 4, the lead screw 4 is disposed through the front cylinder 1, the middle cylinder 2 and the rear cylinder 3, the front end of the lead screw 4 extends out of the front cylinder 1, the rear end of the lead screw extends out of the rear cylinder 3, and the front end of the lead screw 4 is screwed with a nut 5, the nut mounting structure includes a gasket 6 sleeved at the rear end of the lead screw 4 and a nut 7 screwed at the rear end of the lead screw 4, the gasket 6 is located between the rear cylinder 3 and the nut 7, the rear end of the gasket 6 has a rear conical surface 61, a small opening of the rear conical surface 61 faces the nut 7, the front end surface of the nut 7 has a front conical surface 71, a large opening of the front conical surface 71 faces the gasket 6, an inner side wall of the front end of the nut 7 has a chamfer 72, and the front conical surface 71 is attached to the rear. When the front cylinder body 1, the middle cylinder body 2 and the rear cylinder body 3 are assembled, the nut 5 is screwed to enable the nut 5 to be tightly attached to the front cylinder body 1, the nut 7 is screwed to enable the front conical surface 71 to be tightly attached to the rear conical surface 61, the structure that the front conical surface 71 is abutted to the rear conical surface 61 enables the front port of the nut 7 to be slightly outwards spread along with the continuous screwing of the nut 7, the force borne by the first tooth of the nut 7 is reduced, the force borne by the nut 7 is uniformly transited from the first tooth to the last tooth, the nut 7 is not easy to break at the position of the first tooth, the risk of loosening of the nut 7 is reduced, the contact area between the nut 7 and the gasket 6 is increased due to the structure that the rear conical surface 61 is abutted to the front conical surface 71, the friction force between the nut 7 and the gasket 6 is improved, the risk of loosening of the nut 7 is further reduced, and the front cylinder body 1, the middle cylinder body 2 and the rear, the stability of quartering hammer during operation has been improved.

As shown in fig. 1 and fig. 2, the rear end surface of the screw rod 4 has a cylinder 41, the rear end of the nut 7 has a positioning portion 73 sleeved on the cylinder 41, a threaded hole 731 is formed in the outer circumferential surface of the positioning portion 73 along the radial direction of the positioning portion 73, the threaded hole 731 has a plurality of threaded holes 731, and the plurality of threaded holes 731 are arranged along the circumferential direction of the positioning portion 73. A screw 8 is screwed in each threaded hole 731, an annular boss 732 is arranged on the hole wall at the inner end of each threaded hole 731, a steel ball 9 is arranged in each threaded hole 731, the diameter of each steel ball 9 is larger than the inner diameter of the boss 732, and when the steel ball 9 abuts against the boss 732, the steel ball 9 abuts against the outer peripheral surface of the column 41. After the nut 7 presses the gasket 6 to the rear cylinder 3, the screw 8 is screwed so that the end of the screw 8 presses the steel ball 9 to the outer peripheral surface of the positioning portion 73, so that the nut 7 is locked in the radial direction, and the anti-loosening performance of the nut 7 is further improved.

As shown in fig. 1 and 2, a through mounting hole one 31 is formed in the rear end surface of the rear cylinder 3, the mounting hole one 31 is a counter bore, the screw rod 4 is inserted into the mounting hole one 31, and the front end surface of the gasket 6 is provided with a step 62 inserted into the counter bore. The insertion fit of the step 62 and the counterbore has the effect of positioning and automatic alignment of the gasket 6, facilitating the alignment of the front conical surface 71 and the rear conical surface 61.

As shown in fig. 3, a through mounting hole two 11 is formed in the front end surface of the front cylinder body 1, the mounting hole two 11 is a counter bore, the screw rod 4 is inserted into the mounting hole two 11, an annular boss 51 is arranged on the rear end surface of the nut 5, and the boss 51 is inserted into the counter bore and abuts against the wall of the counter bore. This structure realizes the positioning of the nut 5.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A nut mounting structure of a hydraulic breaking hammer comprises a front cylinder body (1), a middle cylinder body (2), a rear cylinder body (3) and a lead screw (4), wherein the lead screw (4) penetrates through the front cylinder body (1), the middle cylinder body (2) and the rear cylinder body (3), the front end of the lead screw (4) extends out of the front cylinder body (1), the rear end of the lead screw extends out of the rear cylinder body (3), a nut (5) is screwed at the front end of the lead screw (4), the nut mounting structure comprises a gasket (6) sleeved at the rear end of the lead screw (4) and a nut (7) screwed at the rear end of the lead screw (4), the gasket (6) is positioned between the rear cylinder body (3) and the nut (7), the nut mounting structure is characterized in that the rear end of the gasket (6) is provided with a rear conical surface (61), a small opening of the rear conical surface (61) faces towards the nut (7), and the front end of the nut (7) is provided with a front conical surface, the large opening of the front conical surface (71) faces the gasket (6), and the front conical surface (71) is attached to the rear conical surface (61).

2. A nut mounting structure of a hydraulic breaker according to claim 1 wherein the inner side wall of the front end of the nut (7) is chamfered (72).

3. The nut mounting structure of the hydraulic breaking hammer according to claim 1, wherein the rear end surface of the screw rod (4) is provided with a cylinder (41), the rear end of the nut (7) is provided with a positioning portion (73) sleeved on the cylinder (41), a threaded hole (731) is formed in the outer peripheral surface of the positioning portion (73) along the radial direction of the positioning portion (73), and a screw (8) is screwed in the threaded hole (731).

4. A nut mounting structure for a hydraulic breaker according to claim 3 wherein the wall of the inner end of the threaded bore (731) has an annular projection (732), the threaded bore (731) has a steel ball (9) disposed therein, the diameter of the steel ball (9) is greater than the inner diameter of the projection (732), and when the steel ball (9) abuts against the projection (732), the steel ball (9) abuts against the outer peripheral surface of the cylinder (41).

5. The nut mounting structure of a hydraulic breaker according to claim 3 or 4 wherein the threaded hole (731) has a plurality of threaded holes (731), and the plurality of threaded holes (731) are provided along a circumferential direction of the positioning portion (73).

6. The nut mounting structure of the hydraulic breaking hammer according to claim 1, wherein a through mounting hole I (31) is formed in the rear end face of the rear cylinder (3), the mounting hole I (31) is a counter bore, the screw rod (4) is arranged in the mounting hole I (31) in a penetrating mode, and the front end face of the gasket (6) is provided with a step (62) inserted into the counter bore.

7. The nut mounting structure of the hydraulic breaking hammer according to claim 1, wherein a second through mounting hole (11) is formed in the front end face of the front cylinder body (1), the second through mounting hole (11) is a counter bore, the screw rod (4) penetrates through the second through mounting hole (11), an annular boss (51) is arranged on the rear end face of the nut (5), and the boss (51) is inserted into the counter bore and abuts against the wall of the counter bore.