Stop ring and rock drill

Abstract

According to the check ring and the rock drill, a brake ring is applied to the rock drill, a bit shank is sleeved with the check ring, the check ring is provided with a pressure-resistant part, the pressure-resistant part is arranged on the inner wall of the check ring, and the pressure-resistant part protrudes towards the center of the check ring; the pressure-resistant part comprises a first acting surface and a second acting surface, and the first acting surface and the second acting surface are arranged in the axial direction; the first acting face faces the front end face of the downwards-concave neck portion of the bit shank, and the inclination angle of the first acting face is the same as that of the front end face of the downwards-concave neck portion. The second acting face faces the rear end face of the downwards-concave neck portion of the bit shank, and the inclination angle of the second acting face is the same as that of the rear end face of the downwards-concave neck portion. The stop ring is provided with the pressure-resistant part, and the pressure-resistant part protrudes inwards and just protrudes into the downwards-concave neck part of the bit shank, so that the contact area of the impact surface of the bit shank and the stop ring is increased, the stress of the impact surface is greatly reduced, and the service life of the stop ring and the service life of the bit shank are prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of rock drills, and in particular to a stop ring and a rock drill. Background Art

[0002] The rock drill is used for mining stones or tunnel excavation, and includes a drill tail, a piston, a stop ring and a housing. The stop ring is sleeved on the drill tail, and the stop ring will bear the impact force of the drill tail. During the operation of the rock drill, due to excessive stroke caused by a specific working condition, the drill tail completely or partially loses the ability to directly act on the rock for consumption. The stop ring can first withstand the impact energy generated by the drill tail, and then transfer it to the machine head for partial consumption in the form of internal energy, thereby avoiding direct action on the machine head. This can reduce the loss of the machine head housing parts to a certain extent, and increase the maintainability and economy of the rock drill.

[0003] However, due to structural size limitations, especially in some small-power compact rock drills, the stop ring in the prior art is a basic circular ring structure, and the main diameter d of the drill tail is slightly different from the major diameter D of the spline. Therefore, the collision surface between the drill tail and the stop ring is set smaller, resulting in excessive end face stress of the drill tail under the same force, causing damage to the spline or stop ring on the front side of the drill tail; and the existing stop ring adopts a floating setting, that is, the stop ring is pressed to the front side by internal air pressure. When the energy of the drill tail hitting the stop ring is too large, the drill tail vibrates greatly in the box, which accelerates the axial outer circle wear of the stop ring to a certain extent, and damages other internal parts, especially rotating parts and other parts with relative motion.

[0004] Therefore, the retaining ring in the rock drilling machine in the prior art has further room for improvement. Utility Model Content

[0005] In view of this, in order to solve the technical problem that the impact surface between the stop ring and the drill tail in the above-mentioned prior art is set to be small, resulting in excessive end face stress and easily causing damage to the drill tail or the stop ring, the present application provides a stop ring and a rock drill, in which the area of ​​the impact surface between the stop ring and the drill tail is set to be larger, which can effectively reduce the contact surface stress, thereby increasing the service life of the drill tail or the stop ring.

[0006] In a first aspect, the present application provides a stop ring for use in a rock drill, wherein the stop ring is provided with a pressure-resistant portion, the pressure-resistant portion is arranged on an inner wall of the stop ring, and the pressure-resistant portion protrudes toward the center of the stop ring;

[0007] Wherein, the pressure-resistant portion comprises a first action surface and a second action surface, and the first action surface and the second action surface are arranged along the axial direction;

[0008] The first action surface faces the front end surface of the concave neck of the shank, and the inclination angle of the first action surface is the same as the inclination angle of the front end surface of the concave neck;

[0009] The second action surface faces the rear end surface of the concave neck of the shank, and the inclination angle of the second action surface is the same as the inclination angle of the rear end surface of the concave neck.

[0010] Compared with the prior art, the stop ring of the present application is provided with a pressure-resistant portion, which protrudes inward and just protrudes into the concave neck of the shank, and the two side surfaces of the pressure-resistant portion along the axial direction, namely the first action surface and the second action surface, are reasonably arranged. As a result, due to the downward convexity of the pressure-resistant portion, the area of ​​the second action surface is increased, so that the contact area between the impact surface of the shank and the stop ring is increased, and the stress on the impact surface is greatly reduced, thereby improving the service life of the stop ring and the shank; and, by matching the inclination angle of the first action surface with the front end surface of the concave neck, and matching the inclination angle of the second action surface with the rear end surface of the concave neck, the stress of the impact between the front and rear ends of the stop ring and the shank can be reduced, thereby improving the service life of the stop ring and the shank.

[0011] In some optional embodiments, the two sides of the concave neck of the shank tail are respectively a front section and a rear section, the outer diameter of the front section is d1, the outer diameter of the concave neck is d2, and the outer diameter of the rear section is d3;

[0012] The inner diameter of the protruding end of the pressure-resistant portion is D, wherein d3>d1>D>d2.

[0013] In some optional embodiments, the inner diameter of the stop ring close to the first action surface is D1, and the inner diameter of the stop ring close to the second action surface is D2, wherein D <d1<D1<d3<D2;

[0014] The protruding end of the pressure-resistant part is an arc structure.

[0015] In some optional embodiments, the stop ring is divided into at least two petals along the axial direction;

[0016] Between two adjacent stop ring petals, one of the stop ring petals is provided with a connecting protrusion, and the other petal is provided with a connecting groove corresponding to the connecting protrusion.

[0017] In some optional embodiments, the connecting protrusion is any one of an isosceles trapezoidal, rectangular, arc-shaped or triangular protrusion.

[0018] In some optional embodiments, when the connecting protrusion is an isosceles trapezoid or a rectangle, a top gap h1 is provided between the top of the connecting protrusion and the connecting groove, and a side gap h2 is provided between the side of the connecting protrusion and the connecting groove;

[0019] Among them, 0

[0020] In some optional embodiments, an O-ring is sleeved on the stop ring;

[0021] A limiting ring groove is arranged on the outer side of the stop ring, the limiting ring groove is recessed toward the center direction of the stop ring, and the O-ring is located in the limiting ring groove.

[0022] In some optional embodiments, an air inlet groove is provided on the end surface of the stop ring facing the rear end surface of the concave neck, and the air inlet groove is concave in the axial direction away from the rear end surface of the concave neck;

[0023] The air inlet groove penetrates the inner and outer side walls of the stop ring along the radial direction.

[0024] In some optional embodiments, a limiting ring is provided on the outer side of the stop ring, and the limiting ring protrudes radially outward;

[0025] The axial thickness of the limiting ring is smaller than the axial thickness of the stop ring;

[0026] The air inlet groove is arranged on the limiting ring.

[0027] A stop ring of the present application has at least the following technical effects:

[0028] 1. By arranging a pressure-resistant part on the stop ring, the pressure-resistant part protrudes toward the concave neck of the shank, thereby increasing the impact surface of the pressure-resistant part and the shank, reducing the stress on the impact surface, thereby improving the service life of the shank and the stop ring;

[0029] 2. By setting the stop ring as a multi-petal structure, it is easy to install and convenient to process; and by setting connecting protrusions or connecting grooves on the end faces of the two adjacent petals of the stop ring for matching, the connection stability of the brake ring petals can be increased;

[0030] 3. By setting an O-ring on the stop ring, the multi-petal stop ring can be divided into petals for enhanced fixation, and the friction of the stop ring can be increased, which can provide a certain buffering effect on impact vibration;

[0031] 4. By setting the air intake groove, the entry of lubricating gas can be guaranteed, avoiding insufficient air intake due to axial positioning of the stop ring.

[0032] Second aspect

[0033] The present application provides a rock drill, comprising the stop ring in any one embodiment of the first aspect;

[0034] ​The rock drill comprises a machine head, a shank, an end cover, a rotating part, a main housing and a piston, wherein the machine head is arranged at the front end of the main housing, the shank at least partially located in the cavity of the machine head, the shank at least partially located in the cavity of the main housing, the piston is arranged in the cavity of the main housing, and the shank and the piston are arranged in sequence along the same axis;

[0035] The stop ring and the rotating part are sleeved on the shank in sequence along the axial direction, and the end cover is sleeved on the rotating part;

[0036] Wherein, the front end surface of the stop ring is in contact with the machine head, and the rear end surface of the stop ring is at least partially in contact with the front end surface of the end cover.

[0037] In the rock drill of the present application, the rear end face of the stop ring is fitted with the rotating part and the end cover at the same time, and the front end face of the stop ring is fitted with the machine head, so that the stop ring is restricted in the axial direction. It is relatively fixed. When the energy of the drill tail hitting the stop ring is too large, the vibration of the drill tail in the box is reduced, and the axial outer circle wear of the stop ring is delayed to a certain extent. Compared with the floating setting in the prior art, the stop ring of the present application does not contact any moving parts other than the drill tail, thereby avoiding the wear caused by such relative movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of a partial cross-sectional structure of a rock drill provided by an embodiment of the present application;

[0039] Figure 2 is a partial cross-sectional enlarged schematic diagram of a stop ring in state 1 provided by an embodiment of the present application;

[0040] Figure 3 is a partial cross-sectional enlarged schematic diagram of a stop ring in state 2 provided by an embodiment of the present application;

[0041] Figure 4 yes Figure 3 A schematic diagram of a local A enlargement;

[0042] Figure 5 It is a schematic diagram of the exploded structure of a stop ring and an O-ring provided in one embodiment of the present application;

[0043] Figure 6 yes Figure 5 An enlarged schematic diagram of a local B;

[0044] Figure 7 A partial cross-sectional view of the connection of the stop ring petals provided in one embodiment of the present application Figure 1 ;

[0045] Figure 8 A partial cross-sectional view of the connection of the stop ring petals provided in one embodiment of the present application Figure 2 ;

[0046] Fig. 9 A partial cross-sectional view of the connection of the stop ring petals provided in one embodiment of the present application Figure 3 ;

[0047] Fig.10 A partial cross-sectional view of the connection of the stop ring petals provided in one embodiment of the present application Figure 4 ;

[0048] Fig.11 yes Figure 7 An enlarged schematic diagram of local C.

[0049] Figure numerals: 1. stop ring; 2. machine head; 3. drill tail; 4. end cover; 5. rotating part; 6. main housing; 7. piston; 8. concave neck; 9. pressure-resistant part; 10. first acting surface; 11. second acting surface; 12. front section; 13. rear section; 14. connecting protrusion; 15. connecting groove; 16. limiting ring groove; 17. O-ring; 18. air inlet groove; 19. limiting ring; 20. air inlet channel. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is described in detail, clearly and completely in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0051] In the description of this application, if there is a description of first or second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0052] Those skilled in the art should understand that, in the disclosure of the present application, the orientation or positional relationship indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present application.

[0053] The present application is further described in detail below in conjunction with the accompanying drawings. Figures 1 to 11 illustrate.

[0054] First aspect

[0055] The present application provides a stop ring, which is used in a rock drill, and is sleeved on a drill tail 3, and acts on a concave neck 8 of the drill tail 3; Figures 1 to 4 The inner wall of the stop ring 1 is provided with a pressure-resistant portion 9, which protrudes toward the center direction of the stop ring 1. The stop ring 1 is provided with a pointed protruding structure. The protruding end of the pressure-resistant portion 9 is located in the middle of the stop ring 1 in the axial direction, that is, there is a certain distance between the two ends of the pressure-resistant portion 9 and the front and rear ends of the stop ring 1. The end of the pressure-resistant portion 9 close to the front side of the shank tail 3 is a first action surface 10, and the end close to the rear end of the shank tail 3 is a second action surface 11. The first action surface 10 faces the front end surface of the concave neck 8, and the second action surface 11 faces the rear end surface of the concave neck 8. The first action surface 10 and the second action surface 11 are The connected end is the protruding end of the pressure-resistant part 9, which is chamfered and has a smooth arc surface to avoid impact wear between the protruding end and the shank 3. When the shank 3 collides with the stop ring 1, the rear end face of the concave neck 8 acts on the second action face 11, and the overlapping part of the two is the impact face. In the present application, since the pressure-resistant part 9 is arranged to protrude downward into the concave neck 8 of the shank 3, the area of ​​the impact face is increased, thereby reducing the stress of the impact face. For the stop ring 1 and the shank 3, the probability of damage due to impact between the two is reduced, thereby increasing the service life of the two.

[0056] Further, such as Figure 4 As shown, the concave neck portion 8 of the shank tail 3 is an annular groove concave toward the center direction of the shank tail 3, and the concave neck portion 8 includes a front end face, a bottom face and a rear end face, the bottom face is parallel to the axial direction, the front end face is an inclined face, and the angle between the front end face and the bottom face is an obtuse angle, and the rear end face is an inclined face, and the angle between the rear end face and the bottom face is an obtuse angle; in this embodiment, the inclination angle of the first action surface 10 is the same as the inclination angle of the front end face of the concave neck portion 8, so that the axial thickness of the pressure-resistant portion 9 can be increased, and the connection area between the pressure-resistant portion 9 and the inner wall of the stop ring 1 can be increased, Increasing the structural strength can effectively prevent the second acting surface 11 from being hit and causing the pressure-resistant part 9 to fall off from the inner wall of the stop ring 1, thereby increasing the overall strength of the stop ring 1 and improving the service life. In addition, the force uniformly applied when the front end face of the concave neck 8 collides with the first acting surface 10 can be reduced, thereby reducing damage. Similarly, the inclination angle of the second acting surface 11 is the same as the inclination angle of the rear end face of the concave neck 8, thereby increasing the fit between the second acting surface 11 and the rear end face of the concave neck 8, evenly distributing stress, reducing damage, and improving service life.

[0057] like Figures 1 to 4As shown, the front side of the concave neck 8 is the front section 12 of the shank 3, and the rear side of the concave neck 8 is the rear section 13 of the shank 3. Among them, the outer diameter of the front section 12 of the shank 3 is d1, the outer diameter of the bottom surface of the concave neck 8 is d2, the outer diameter of the rear section 13 of the shank 3 is d3, and the inner diameter of the tip of the protruding end of the pressure-resistant part 9 is D. Among them, d3>d1>D>d2, that is, the outer diameter of the front section 12 of the shank 3 is smaller than the outer diameter of the rear section 13; correspondingly, as Figure 2 、 Figure 4 shown, the inner diameter of the retaining ring 1 on the side close to the first acting surface 10 is D1, the inner diameter of the retaining ring 1 on the side close to the second acting surface 11 is D2. The side of the retaining ring 1 close to the first acting surface 10 is fitted with the front section 12 of the shank 3, and the side of the retaining ring 1 close to the second acting surface 11 is fitted with the rear section 13 of the shank 3. Among them, D<d1<D1<d3<D2, that is, the inner diameter of the front section 12 of the retaining ring 1 is slightly larger than the outer diameter of the front section 12 of the shank 3, the outer diameter of the rear section 13 of the retaining ring 1 is slightly larger than the outer diameter of the rear section 13 of the shank 3, and the inner diameter of the end of the protruding end of the pressure-resistant part 9 of the retaining ring 1 is slightly larger than the outer diameter of the bottom surface of the concave neck 8, so that the shank 3 can displace axially relative to the retaining ring 1, and during the movement, the relative wear between the shank 3 and the retaining ring 1 is greatly reduced.

[0058] Furthermore, as Figure 5 to Figure Fig.11 shown, the retaining ring 1 is set as a multi-lobe structure, that is, the retaining ring 1 is axially divided into at least two lobes, and each lobe of the retaining ring 1 is connected axially between the lobes. As Figure 5 、 Figure 6 shown, on the axial end face of each lobe of the retaining ring 1, there are connecting protrusions 14 or connecting grooves 15. There is at least one connecting protrusion 14, and the shape of the connecting groove 15 corresponds to that of the connecting protrusion 14. Between two adjacent lobes of the retaining ring 1, they are fitted through the connecting protrusion 14 and the connecting groove 15, that is, among the two lobes of the retaining ring 1 that are connected to each other, one is provided with a connecting protrusion 14, and the other lobe is provided with a connecting groove 15, and the connecting protrusion 14 is embedded in the connecting groove 15, so as to strengthen the connection alignment effect and connection stability between the two connected lobes of the retaining ring 1, making it not easy for them to come apart. In this embodiment, by setting the retaining ring 1 as a multi-lobe structure, it is convenient to install the retaining ring 1 on the shank 3, and the processing difficulty of each lobe of the retaining ring 1 is greatly reduced, which can effectively improve the processing time and reduce the processing cost.

[0059] Furthermore, on one lobe of the retaining ring 1, a connecting protrusion 14 is provided at one end and a connecting groove 15 is provided at the other end, and the connecting groove 15 and the connecting protrusion 14 are symmetrically arranged, so that the multi-lobe retaining ring 1 does not need to be designed differently, which can reduce the production cost. As Figure 5 、 Figure 6As shown, the fitting surface of the petals of the stop ring 1 is chamfered throughout the entire circle to reduce the sharp edges caused by processing and the impact of loose fitting caused by wear of the petals of the stop ring 1 during use.

[0060] It should be noted that, in the present application, the stop ring 1 includes two petals of the stop ring 1. In actual use, the number of the stop petals can be selected according to actual needs. In the present application, there is no specific limitation on the number of petals of the stop ring 1.

[0061] Further, such as Figures 7 to 11 As shown, the connecting protrusion 14 can be any one of an isosceles trapezoid, a rectangle, an arc or a triangle, that is, the connecting protrusion 14 is preferably a symmetrical structure, and its protrusion formation is not unique; in the present application, the connecting protrusion 14 is preferably an isosceles trapezoid.

[0062] When the connecting protrusion 14 is an isosceles trapezoid or a rectangle, the top of the connecting protrusion 14 is a plane. Fig.11 As shown, a top gap h1 is provided between the top of the connecting protrusion 14 and the bottom of the connecting groove 15, and a side gap h2 is provided between the side of the connecting protrusion 14 and the connecting groove 15, wherein 0

[0063] Furthermore, it is preferred to set the range of h1 and h2 to 0.

[0064] like Figure 5 As shown, a limiting ring groove 16 is provided on the stop ring 1, and the limiting ring groove 16 is circumferentially arranged on the front section 12 of the stop ring 1, and the limiting ring groove 16 is recessed toward the center direction of the stop ring 1, but the bottom of the groove does not involve the end faces where the connecting protrusion 14 and the connecting groove 15 are arranged, thereby avoiding interference between the two petals of the stop ring 1 and the limiting ring groove 16 when the two petals are fastened together; an O-ring 17 is provided on the limiting ring groove 16, and the limiting ring groove 16 is used to limit the O-ring 17 to prevent the O-ring 17 from shifting. On the one hand, the O-ring 17 can consolidate the multi-petal stop ring 1 petals that are fastened together to form a complete stop ring 1 kit, and on the other hand, the O-ring 17 can increase the friction of the stop ring 1 kit and have a certain buffering effect on vibration.

[0065] Further, such as Figure 5 , Figure 6 ​​As shown, an air inlet groove 18 is provided on the end face of the stop ring 1 close to the rear section 13 of the shank tail 3, and at least one air inlet groove 18 is provided. The air inlet groove 18 penetrates the inner and outer side walls of the stop ring 1 in the radial direction, and the air inlet groove 18 is recessed in the axial direction toward the end away from the rear section 13 of the shank tail 3, that is, the air inlet groove 18 is arranged at a position close to the rear end face of the concave neck 8. The setting of the air inlet groove 18 can avoid insufficient air intake due to axial positioning of the stop ring 1, thereby ensuring the entry of lubricating gas.

[0066] In this embodiment, four air inlet grooves 18 are arranged, and the four air inlet grooves 18 are arranged at equal intervals along the end surface of the stopping ring 1, which can ensure the uniformity of air intake. When the stopping ring 1 includes two petals of the stopping ring 1, two air inlet grooves 18 are arranged on each petal of the stopping ring 1. When the stopping ring 1 petals are fixed to form the stopping ring 1, the intervals between each air inlet groove 18 are the same.

[0067] Further, such as Figure 2 , Figure 3 , Figure 5 to Figure 6 As shown, a limit ring 19 is provided on the outside of the stop ring 1, and the limit ring 19 is arranged at one end close to the second acting surface 11, that is, the limit ring 19 is arranged at the front end of the stop ring 1, and the limit ring 19 protrudes radially outward. The axial thickness of the limit ring 19 is less than the axial thickness of the stop ring 1, and there is a certain distance between the front end of the limit ring 19 and the limit ring groove 16, that is, the front end of the limit ring 19 is behind the limit ring groove 16, and the front end of the limit ring 19 slightly protrudes from the front end of the stop ring 1.

[0068] like Figure 5 , Figure 6 As shown, the connecting protrusion 14 and the connecting groove 15 are arranged on the axial end face of the stop ring 1, and the air inlet groove 18 is arranged on the radial end face of the limit ring 19 to avoid mutual interference and ensure the structural strength; wherein, when the stop ring 1 is a multi-petal structure, among the two mutually connected stop ring 1 petals, one of the limit rings 19 is provided with a groove on its cross section, and the other limit ring 19 is provided with a corresponding protrusion to cooperate with the groove, thereby increasing the connection stability between the limit rings 19 and making the connection of the stop ring 1 more stable.

[0069] Second aspect

[0070] The present application provides a rock drill, comprising the stop ring 1 in any embodiment provided in the first aspect, the rock drill comprising a machine head 2, a shank 3, an end cover 4, a rotating member 5, a main housing 6 and a piston 7, the machine head 2 being arranged at the front end of the main housing 6, a cavity for installing the shank 3 being arranged in the machine head 2, a cavity for installing the piston 7 being arranged in the main housing 6, the cavities being communicated after the machine head 2 is connected to the main housing 6, most of the shank 3 being located in the cavity of the machine head 2, the rear end of the shank 3 entering the cavity of the main housing 6, the shank 3 and the piston 7 being arranged along the same axis, the shank 3 being arranged at the front end of the piston 7, and the piston 7 making an axial reciprocating motion to impact the shank 3.

[0071] like Figure 1 As shown, the stop ring 1 is sleeved on the front end of the concave neck 8 of the shank tail 3, the rotating member 5 is sleeved on the rear end of the concave neck 8 of the shank tail 3, and the end cover 4 is sleeved on the outer side of the rotating member 5, wherein an air inlet channel 20 is provided between the front end of the end cover 4 and the rear end of the machine head 2, as shown in FIG. Figure 2 , Figure 3 As shown, the front end face of the stop ring 1 fits with the machine head 2, and the rear end face of the stop ring 1 at least partially fits with the front end face of the end cover 4, that is, the limit ring 19 of the stop ring 1 protrudes between the drill tail 3 and the end cover 4, and the air inlet channel 20 is located at the upper end of the limit ring 19, which can facilitate the lubricating gas to enter the interior of the stop ring 1 directly from the air inlet groove 18 through the air inlet channel 20.

[0072] Furthermore, a gap is provided between the rear end of the stop ring 1 and the front end of the rotating member 5, and the gap is located inside the air inlet groove 18. In the radial direction, the lubricating gas enters the air inlet groove 18 from the air inlet channel 20 between the end cover 4 and the shank 3, and then passes through the gap between the rotating member 5 and the stop ring 1 in the radial direction through the air inlet groove 18, thereby entering between the stop ring 1 and the shank 3 to achieve lubrication.

[0073] In the present embodiment, the setting of the limit ring 19 ensures that the stop ring 1 still has good structural strength after the air inlet groove 18 is set, and the limit ring 19 is located between the drill tail 3 and the end cover 4, which increases the limit of the stop ring 1 in the rock drill, so that the stop ring 1 is restricted in the axial direction. It is relatively fixed. When the drill tail 3 hits the stop ring 1 with too much energy, the vibration of the drill tail 3 in the box is reduced, and the axial outer circle wear of the stop ring 1 is delayed to a certain extent. Compared with the floating setting in the prior art, the stop ring 1 of the present application does not contact any moving parts other than the drill tail 3, thereby avoiding the wear caused by such relative movement.

[0074] It should be noted that the various embodiments of the present application can be arbitrarily combined into a new embodiment if the solutions do not conflict and the technical solutions can coexist.

[0075] The present application is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A stop ring, used in a rock drill, wherein the stop ring (1) is sleeved on a drill tail (3), and is characterized in that: The stop ring (1) is provided with a pressure-resistant portion (9), the pressure-resistant portion (9) is arranged on the inner wall of the stop ring (1), and the pressure-resistant portion (9) protrudes toward the center of the stop ring (1); The pressure-resistant portion (9) comprises a first action surface (10) and a second action surface (11), and the first action surface (10) and the second action surface (11) are arranged along the axial direction; The first action surface (10) faces the front end surface of the concave neck (8) of the shank (3), and the inclination angle of the first action surface (10) is the same as the inclination angle of the front end surface of the concave neck (8); The second action surface (11) faces the rear end surface of the concave neck (8) of the shank (3), and the inclination angle of the second action surface (11) is the same as the inclination angle of the rear end surface of the concave neck (8).

2. The stop ring according to claim 1, characterized in that: The two sides of the concave neck (8) of the shank tail (3) are respectively a front section (12) and a rear section (13), the outer diameter of the front section (12) is d1, the outer diameter of the concave neck (8) is d2, and the outer diameter of the rear section (13) is d3; The inner diameter of the protruding end of the pressure-resistant portion (9) is D, wherein d3>d1>D>d2.

3. The stop ring according to claim 2, characterized in that: The inner diameter of the stop ring (1) on the side close to the first action surface (10) is D1, and the inner diameter of the stop ring (1) on the side close to the second action surface (11) is D2, wherein D <d1<D1<d3<D2; The protruding end of the pressure-resistant portion (9) is an arc structure.

4. The stop ring according to claim 1, characterized in that The stop ring (1) is divided into at least two petals along the axial direction; Between two adjacent petals of the stop ring (1), one petal of the stop ring (1) is provided with a connecting protrusion (14), and the other petal is provided with a connecting groove (15) corresponding to the connecting protrusion (14).

5. The stop ring according to claim 4, characterized in that: The connecting protrusion (14) is any one of an isosceles trapezoidal, rectangular, arc-shaped or triangular protrusion.

6. The stop ring according to claim 5, characterized in that: When the connecting protrusion (14) is an isosceles trapezoid or a rectangle, a top gap h1 is provided between the top of the connecting protrusion (14) and the connecting groove (15), and a side gap h2 is provided between the side surface of the connecting protrusion (14) and the connecting groove (15); Among them, 0 <h1<0.2mm,0<h2<0.1mm。 7. The stop ring according to claim 1, characterized in that: An O-ring (17) is sleeved on the stop ring (1); A limiting ring groove (16) is provided on the outer side of the stop ring (1), the limiting ring groove (16) is recessed towards the center of the stop ring (1), and the O-ring (17) is located in the limiting ring groove (16).

8. The stop ring according to claim 1, characterized in that: An air inlet groove (18) is provided on the end surface of the stop ring (1) facing the rear end surface of the concave neck (8), and the air inlet groove (18) is concave in the axial direction in a direction away from the rear end surface of the concave neck (8); The air inlet groove (18) penetrates the inner and outer side walls of the stop ring (1) in the radial direction.

9. The stop ring according to claim 8, characterized in that: A limiting ring (19) is provided on the outer side of the stop ring (1), and the limiting ring (19) protrudes radially outward; The axial thickness of the limiting ring (19) is smaller than the axial thickness of the stop ring (1); The air inlet groove (18) is arranged on the limiting ring (19).

10. A rock drill, characterized in that: comprising a stop ring as claimed in any one of claims 1 to 9; The rock drill comprises a machine head (2), a drill tail (3), an end cover (4), a rotating member (5), a main housing (6) and a piston (7); the machine head (2) is arranged at the front end of the main housing (6); at least part of the drill tail (3) is located in the cavity of the machine head (2); at least part of the drill tail (3) is located in the cavity of the main housing (6); the piston (7) is arranged in the cavity of the main housing (6); and the drill tail (3) and the piston (7) are arranged in sequence along the same axis; The stop ring (1) and the rotating member (5) are sleeved on the shank tail (3) in sequence along the axial direction, and the end cover (4) is sleeved on the rotating member (5); The front end surface of the stop ring (1) is in contact with the machine head (2), and the rear end surface of the stop ring (1) is at least partially in contact with the front end surface of the end cover (4).

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