Rock drill swing mechanism motor connecting assembly

Abstract

The utility model discloses a rock drill slewing mechanism motor connecting assembly which comprises a connecting piece arranged between a hydraulic motor and a rock drill shell, and a connecting groove hole used in cooperation with the connecting piece is formed in the rock drill shell. The connecting piece comprises a bolt piece capable of penetrating through a flange hole of the hydraulic motor, and the end of the bolt piece is detachably connected with a locking piece. In the rock drilling process, according to different working conditions of rock states, the connecting groove holes in the rock drilling machine shell are specially machined and connected with the rock drilling machine shell through the connecting pieces, the problem of stress concentration of the roots of threads of the connecting pieces is effectively solved, and the situation that connection of the rock drilling machine is loosened due to alternating torque generated by drill jamming under complex working conditions is avoided; the reliability of the rock drill is guaranteed, the service life of the rock drill is prolonged, and therefore the rock drill is suitable for fast drilling in different rock states, and the rock drilling efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydraulic rock drills, specifically relating to a motor connection assembly for the rotary mechanism of a rock drill. Background Technology

[0002] As hydraulic rock drills evolve towards high-frequency, high-pressure, and rapid switching, higher demands are placed on their frequency and impact energy. Similarly, a proper match between the impact and rotation of the rock drill can achieve better drilling results, so rotation performance is also an important performance parameter of hydraulic rock drills.

[0003] The rotational performance parameters of a hydraulic rock drill directly affect its drilling efficiency. The two main parameters are rotational torque and rotational speed. The hydraulic motor, as the power source for the rotational mechanism, transmits torque to the drill rod through a reduction gear to shear the rock. The resistance torque generated by the drill rod and drill bit during rotation and rock shearing is the rotational torque of the hydraulic rock drill. The rotational speed of the hydraulic rock drill determines the distance the drill rod rotates between every two impact drilling operations, which is also known as the drill rod rotation speed.

[0004] Therefore, for a hydraulic rock drill to achieve the desired impact performance, the number of rotations required to drill rocks of different properties has a significant impact on the drilling efficiency of the rock drill.

[0005] During drilling operations, hydraulic rock drills are prone to abnormal conditions such as drill bit jamming due to the variable physical properties of the rock at the construction site. When the maximum rotational force output by the hydraulic rock drill's rotary mechanism is less than the rotational resistance from the drill bit, the drill bit can become stuck in the borehole. There are three types of jamming: one is caused by a sudden entry into a karst cave, resulting in a rapid drop or rise in the drill's rotational pressure; the second type is caused by a gradual change in rotational pressure; and the third type is caused by a sudden entry into a crack, leading to a rapid increase in pressure.

[0006] Getting stuck in the drill bit is unavoidable. As a result, the rotating mechanism of the rock drill will generate a corresponding alternating torque, which is then transmitted to the hydraulic motor. This alternating torque and vibration can easily cause the connecting parts that fix the motor to loosen, resulting in the motor bolts being subjected to flange shear force and breaking, thus affecting the normal operation of the rock drill.

[0007] like Figure 6As shown, the conventional hydraulic rock drill motor connection uses a sealing paper gasket and ordinary double-ended bolt washers and nuts. In the existing connection method, the hydraulic rock drill will vibrate during the rock drilling process as the rock physical properties change. Water and slag erosion will damage the sealing paper gasket 1. At the same time, long-term vibration will cause the nut 4 to loosen. If the nut loosens, the connection between the motor 5 and the housing 6 will also loosen. At this time, the alternating torque generated by the rotation of the motor during the operation of the rock drill will cause the motor flange to act on the double-ended bolt 2. Since it is directly installed on the rock drill housing, the stress at the connection between the root of its thread and the housing is concentrated at the junction, so a shearing force is directly generated, causing the stress concentration at the root of the double-ended bolt 2 to break. In severe cases, it will also damage the flange fixing hole of the motor 5.

[0008] Ordinary double-ended bolts are insufficient for resolving motor nut loosening issues during rock drilling. The only recourse is to shorten maintenance cycles (requiring regular checks and tightening of the nuts as needed), significantly impacting drilling efficiency. If maintenance is delayed, nut loosening can lead to bolt root breakage, which cannot be resolved on-site. The rock drill must be shut down and taken to a specialized repair shop for major repairs to remove the broken bolt. This prolonged maintenance period results in serious malfunctions and disrupts drilling operations. Utility Model Content

[0009] The purpose of this utility model is to provide a motor connection assembly for the rotary mechanism of a rock drill, so as to solve the technical defects of existing motor connection assemblies for the rotary mechanism of rock drills, which are prone to loosening and breakage, thus affecting rock drilling operations.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A rock drill rotary mechanism motor connection assembly includes a connector disposed between a hydraulic motor and a rock drill housing, wherein the rock drill housing is provided with a connection slot for use with the connector.

[0012] The connector includes bolts that can pass through the flange hole of the hydraulic motor, and the ends of the bolts are detachably connected to locking components.

[0013] The bolt component includes a nut section and a slotted section. The nut section and the slotted section are integrally formed with a stepped section, and a transition section is formed between the stepped section and the nut section.

[0014] The connecting slot includes a connecting hole opened on the rock drill housing. The connecting hole is set in a corresponding manner with the flange hole of the hydraulic motor. The slot section passes through the corresponding connecting hole and connects with it. The inner cavity of the connecting hole facing the hydraulic motor is provided with a positioning hole that is adapted to the stage.

[0015] As a preferred embodiment of this utility model, the diameter of the nut segment is smaller than the diameter of the slot segment, the diameter of the platform segment is larger than the diameter of the slot segment, and the nut segment, slot segment, platform segment, and transition segment are coaxially arranged.

[0016] As a preferred embodiment of this utility model, the surface of the slotted section is provided with a first external thread, and the inner wall surface of the connecting hole is provided with a first internal thread. The slotted section is threadedly connected to the connecting hole through the first external thread and the first internal thread.

[0017] As a preferred embodiment of this utility model, the locking component includes a threaded sleeve connected to the surface of the nut section. The threaded sleeve is located on the side of the hydraulic motor flange away from the rock drill housing. An anti-loosening component is provided between the threaded sleeve and the hydraulic motor flange. The locking component and the anti-loosening component are an embedded integrated structure.

[0018] As a further embodiment of this utility model, the anti-loosening component includes a first wedge-type anti-loosening washer and a second wedge-type anti-loosening washer sleeved on the nut section. The convex tooth surfaces of the first wedge-type anti-loosening washer and the second wedge-type anti-loosening washer are arranged opposite to each other. The first wedge-type anti-loosening washer contacts the locking component, and the second wedge-type anti-loosening washer contacts the hydraulic motor flange.

[0019] As a further embodiment of this utility model, the surface of the nut segment is provided with a second external thread, and the inner wall surface of the threaded sleeve is provided with a second internal thread. The threaded sleeve is threaded onto the surface of the nut segment through the engagement of the second internal thread and the second external thread.

[0020] As a preferred embodiment of this utility model, a sealing gasket is provided between the hydraulic motor and the rock drill housing. The sealing gasket has a through hole for the nut section to pass through, and the through hole is correspondingly set with the positioning hole.

[0021] As a further preferred embodiment of this utility model, the sealing gasket includes an inner layer and an outer layer, with the outer layer wrapping around the surface of the inner layer. The inner layer is a metal gasket, and the outer layer is a silicone gasket.

[0022] Compared with existing technologies, the rock drill rotary mechanism motor connection assembly provided by this utility model has the following beneficial effects: By specially processing the connection slot on the rock drill housing according to different working conditions of rock during the rock drilling process, and using a connector to connect it, the problem of stress concentration at the root of the connector thread is effectively solved, avoiding loosening of the connection caused by alternating torque generated by the rock drill jamming under complex working conditions, ensuring the reliability of the rock drill, and extending the service life of the rock drill, thereby adapting to rapid drilling under different rock conditions and improving rock drilling efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the assembly structure of the present invention with a hydraulic motor and a rock drill housing;

[0025] Figure 2 This is an exploded view of the assembly structure of the present invention with a hydraulic motor and a rock drill housing.

[0026] Figure 3 This is a cross-sectional exploded view of the connector, connecting slot, and rock drill housing in an embodiment of this utility model.

[0027] Figure 4 This is a partial exploded cross-sectional view of the connector, connecting slot, and rock drill housing in an embodiment of this utility model;

[0028] Figure 5 This is an exploded view of the connecting nut structure in an embodiment of this utility model;

[0029] Figure 6 This is a schematic diagram showing the connection between the rotary mechanism and the motor of a rock drill in the prior art.

[0030] Figure label:

[0031] 1. Sealing gasket; 2. Double-ended bolt; 3. Washer; 4. Nut; 5. Hydraulic motor; 6. Rock drill housing; 100. Connecting parts; 110. Bolt parts; 111. Nut section; 112. Slotted section; 113. Platform stage; 114. Transition section; 120. Locking parts; 121. Threaded sleeve; 122. First wedge-type anti-loosening washer; 123. Second wedge-type anti-loosening washer; 200. Connecting slot; 210. Connecting hole; 220. Positioning hole; 300. Sealing gasket. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0033] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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 the embodiments of this utility model.

[0034] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0035] See appendix Figures 1-5 As shown in the figure, an embodiment of the present invention provides a motor connection assembly for a rock drill rotary mechanism, including a connector 100 and a connecting slot 200. The connector 100 is disposed between a hydraulic motor 5 and a rock drill housing 6, and the connecting slot 200 is disposed on the rock drill housing 6 and cooperates with the connector 100. The connector 100 includes a bolt 110 that can pass through the flange hole of the hydraulic motor 5, and a locking member 120 is detachably connected to the end of the bolt 110. The bolt 110 includes a nut section 111 and a slot section 120. 12. A stepped section 113 is integrally formed between the nut section 111 and the slotted section 112, and a transition section 114 is formed between the stepped section 113 and the nut section 111; the connecting slot 200 includes a connecting hole 210 opened on the rock drill housing 6, the connecting hole 210 is correspondingly set with the flange hole of the hydraulic motor 5, the slotted section 112 passes through into the corresponding connecting hole 210 and connects with it, and the inner cavity of the connecting hole 210 facing the hydraulic motor 5 is provided with a positioning hole 220 that is adapted to the stepped section 113.

[0036] See Figure 4 As shown, the diameter of the nut section 111 is smaller than the diameter of the slot section 112, and the diameter of the platform section 113 is larger than the diameter of the slot section 112. The nut section 111, the slot section 112, the platform section 113, and the transition section 114 are coaxially arranged.

[0037] The surface of the slotted section 112 is provided with a first external thread, and the inner wall of the connecting hole 210 is provided with a first internal thread. The slotted section 112 is threadedly connected to the connecting hole 210 through the first external thread and the first internal thread. The locking member 120 includes a threaded sleeve 121 connected to the surface of the nut section 111. The threaded sleeve 121 is located on the side of the hydraulic motor 5 flange away from the rock drill housing 6. An anti-loosening element is provided between the threaded sleeve 121 and the hydraulic motor 5 flange. Through the cooperation of the nut section 111 and the threaded sleeve 121, the hydraulic motor 5 and the nut section 111 can be fixedly connected.

[0038] To achieve a durable and effective anti-loosening effect, the locking component and the anti-loosening component are designed as an embedded integrated structure. The anti-loosening component includes a first wedge-type anti-loosening washer 122 and a second wedge-type anti-loosening washer 123 sleeved on the nut section 111. The convex tooth surfaces of the first wedge-type anti-loosening washer 122 and the second wedge-type anti-loosening washer 123 are arranged opposite to each other. The first wedge-type anti-loosening washer 122 contacts the locking component 120, and the second wedge-type anti-loosening washer 123 contacts the flange of the hydraulic motor 5. The anti-loosening component can effectively reduce the loss of preload when the structure is subjected to vibration, impact, tension and other forces, and effectively prevent the relative rotation of the threaded sleeve 121.

[0039] The surface of the nut segment 111 is provided with a second external thread, and the inner wall surface of the threaded sleeve 121 is provided with a second internal thread. The threaded sleeve 121 is threadedly sleeved onto the surface of the nut segment 111 through the engagement of the second internal thread and the second external thread.

[0040] In order to provide sealing and shock absorption, a sealing gasket 300 is provided between the hydraulic motor 5 and the rock drill housing 6. The sealing gasket 300 has a through hole for the nut section 111 to pass through. The through hole is set in correspondence with the positioning hole 220. The sealing gasket 300 can prevent the hydraulic motor 5 from directly contacting the rock drill housing 6.

[0041] To extend the service life of the sealing gasket 300, the sealing gasket 300 comprises an inner layer and an outer layer, with the outer layer wrapping around the surface of the inner layer. The inner layer is a metal gasket, and the outer layer is a silicone gasket, which improves the quality of the sealing gasket 300 and avoids the corrosion and cracking problems that occur later when using ordinary paper gaskets.

[0042] When using the rock drill rotary mechanism motor connection assembly of the above technical solution, the slotted section 112 is inserted into the corresponding connection hole 210 and rotated, so that the slotted section 112 is connected to the corresponding connection hole 210 through the first external thread and the first internal thread. At the same time, the platform stage 113 is placed in the positioning hole 220 to solve the problem of stress concentration at the root of the bolt 110 thread and avoid the problem of the bolt 110 loosening and breaking due to special reasons caused by the hydraulic motor 5. Then, the sealing gasket 300 is placed on one side of the rock drill housing 6, so that the nut section 111 passes through the through hole on the sealing gasket 300.

[0043] Pass the flange hole of the hydraulic motor 5 through the nut section 111, and then successively put the second wedge-type anti-loosening washer 123 and the first wedge-type anti-loosening washer 122 on the nut section 111, so that the convex tooth surfaces of the first wedge-type anti-loosening washer 122 and the second wedge-type anti-loosening washer 123 are arranged opposite to each other.

[0044] Finally, the threaded sleeve 121 is fitted onto the nut section 111 and rotated, so that the threaded sleeve 121 presses the first wedge-type anti-loosening washer 122 and the second wedge-type anti-loosening washer 123 against the flange of the hydraulic motor 5, thus completing the connection and fixing operation between the hydraulic motor 5 and the rock drill housing 6.

[0045] In summary, this utility model provides a motor connection assembly for the rotary mechanism of a rock drill. By specially processing the connecting slot on the rock drill housing according to different rock conditions during the rock drilling process, and connecting it with a connector, the problem of stress concentration at the root of the connecting thread is effectively solved. This avoids loosening of the connection caused by alternating torque generated by the rock drill getting stuck under complex working conditions, ensuring the reliability of the rock drill and extending its service life. As a result, it can adapt to rapid drilling under different rock conditions and improve rock drilling efficiency.

[0046] The above description illustrates the basic principles of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The above embodiments and descriptions in the specification are only for illustrating the principles of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A motor connection assembly for a rock drill rotary mechanism, characterized in that, include: A connector (100) is provided between the hydraulic motor (5) and the rock drill housing (6), and the rock drill housing (6) is provided with a connecting slot (200) that cooperates with the connector (100). The connector (100) includes a bolt (110) that can pass through the flange hole of the hydraulic motor (5), and the bolt (110) is detachably connected to a locking element (120) at its end. The bolt component (110) includes a nut section (111) and a slot section (112). A platform section (113) is integrally formed between the nut section (111) and the slot section (112), and a transition section (114) is formed between the platform section (113) and the nut section (111). The connecting slot (200) includes a connecting hole (210) opened on the rock drill housing (6). The connecting hole (210) is correspondingly set with the flange hole of the hydraulic motor (5). The slot section (112) passes through the corresponding connecting hole (210) and is connected to it. The inner cavity of the connecting hole (210) facing the hydraulic motor (5) is provided with a positioning hole (220) that is adapted to the stage (113).

2. The rock drill rotary mechanism motor connection assembly according to claim 1, characterized in that: The diameter of the nut segment (111) is smaller than the diameter of the slot segment (112), and the diameter of the platform segment (113) is larger than the diameter of the slot segment (112). The nut segment (111), the slot segment (112), the platform segment (113), and the transition segment (114) are coaxially arranged.

3. The rock drill rotary mechanism motor connection assembly according to claim 1, characterized in that: The surface of the slotted section (112) is provided with a first external thread, and the inner wall of the connecting hole (210) is provided with a first internal thread. The slotted section (112) is threadedly connected to the connecting hole (210) through the first external thread and the first internal thread.

4. The rock drill rotary mechanism motor connection assembly according to claim 1, characterized in that: The locking component (120) includes a threaded sleeve (121) connected to the surface of the nut section (111). The threaded sleeve (121) is located on the side of the hydraulic motor (5) flange away from the rock drill housing (6). An anti-loosening component is provided between the threaded sleeve (121) and the hydraulic motor (5) flange. The locking component (120) and the anti-loosening component are an embedded integrated structure.

5. The rock drill rotary mechanism motor connection assembly according to claim 4, characterized in that: The anti-loosening component includes a first wedge-type anti-loosening washer (122) and a second wedge-type anti-loosening washer (123) sleeved on the nut section (111). The convex tooth surfaces of the first wedge-type anti-loosening washer (122) and the second wedge-type anti-loosening washer (123) are arranged opposite to each other. The first wedge-type anti-loosening washer (122) is in contact with the locking component (120), and the second wedge-type anti-loosening washer (123) is in contact with the flange of the hydraulic motor (5).

6. The rock drill rotary mechanism motor connection assembly according to claim 4, characterized in that: The surface of the nut segment (111) is provided with a second external thread, and the inner wall surface of the threaded sleeve (121) is provided with a second internal thread. The threaded sleeve (121) is threaded onto the surface of the nut segment (111) through the cooperation of the second internal thread and the second external thread.

7. The rock drill rotary mechanism motor connection assembly according to claim 1, characterized in that: A sealing gasket (300) is provided between the hydraulic motor (5) and the rock drill housing (6). The sealing gasket (300) has a through hole for the nut section (111) to pass through, and the through hole is corresponding to the positioning hole (220).

8. The rock drill rotary mechanism motor connection assembly according to claim 7, characterized in that: The sealing gasket (300) comprises an inner layer and an outer layer, the outer layer being wrapped around the surface of the inner layer, the inner layer being a metal gasket, and the outer layer being a silicone gasket.

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