Guide sleeve dismounting device

Abstract

The utility model discloses a guide sleeve dismounting device which comprises a base frame, a pull rod and a clamping jaw mechanism, and the clamping jaw mechanism comprises at least one sliding block. The sliding blocks are arranged on the base frame, the sliding blocks have the stroke of displacement in the radial direction on the base frame, and when the number of the sliding blocks is two or more, the sliding blocks are distributed on the base frame at intervals in the circumferential direction. The first end of the pull rod is arranged on the base frame, the second end of the pull rod is located outside the base frame, and the pull rod has an axial displacement stroke on the base frame; the pull rod is provided with a first diagonal plane in contact fit with the first end of the sliding block, so that the second end of the sliding block stretches out of the side portion of the base frame or retracts into the base frame in the axial displacement process of the pull rod. The guide sleeve disassembling tool is applied to the field of tool equipment, can apply disassembling pressure or pulling force to a guide sleeve on the premise that the guide sleeve is not damaged, is suitable for disassembling most guide sleeves, and is convenient to use in a construction site.

Description

TECHNICAL FIELD

[0001] The utility model relates to tool equipment technical field, concretely is a guide sleeve dismounting device. BACKGROUND

[0002] The hydraulic rock drill is usually internally provided with a special-shaped guide sleeve, the cooperation between the outer circle of the guide sleeve and the corresponding mounting hole is generally interference fit or gap fit, and the outer circle of the guide sleeve is usually further provided with a sealing ring, so that the friction between the outer circle of the guide sleeve and the corresponding mounting hole is relatively large, and in addition, the guide sleeve is usually not designed with a separate dismounting structure, so that the guide sleeve can only be forced out by means of the sealing ring groove in the inner hole of the guide sleeve when being dismounted, which leads to the difficulty in dismounting the guide sleeve. The conventional dismounting scheme is to clamp a draw bar in the sealing ring groove of the guide sleeve and pull it out by using a slide hammer, or knock it out by using a punch. However, when the interference fit of the outer circle of the guide sleeve is relatively large, the guide sleeve cannot be smoothly dismounted, and the draw bar and the punch will cause damage to the surface of the guide sleeve, so it is necessary to design a special dismounting tool. The technical difficulties in the design of the tool are as follows: 1) how to exert force without damaging the guide sleeve; 2) how to exert a relatively large dismounting pressure through the tool; and 3) how to make the tool simple in structure and convenient to use on site. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model provides a guide sleeve dismounting device which can exert dismounting pressure or pulling force on the guide sleeve without damaging the guide sleeve, is suitable for the dismounting of most guide sleeves, and is convenient to use on site.

[0004] To achieve the above object, the utility model provides a guide sleeve dismounting device which comprises a base frame, a draw bar and a claw mechanism, the claw mechanism comprises at least one sliding block, the base frame comprises a base body and a gland, one end of the base body is provided with an opening, the draw bar is arranged in the opening of the base body and is connected with the sliding block, and the draw bar is provided with a first inclined surface which is in contact with the first end of the sliding block.

[0005] The sliding block is arranged on the base frame, the sliding block has a radial displacement stroke on the base frame, and when the number of the sliding blocks is two or more, the sliding blocks are distributed on the base frame in a circumferential direction.

[0006] The first end of the draw bar is arranged on the base frame, the second end of the draw bar is located outside the base frame, and the draw bar has an axial displacement stroke on the base frame.

[0007] The draw bar is provided with the first inclined surface which is in contact with the first end of the sliding block, so that the second end of the sliding block protrudes from the side of the base frame or is retracted into the base frame in the process of axial displacement of the draw bar.

[0008] In one embodiment, the base frame comprises a base body and a gland, one end of the base body is provided with an opening, the draw bar is arranged in the opening of the base body and is connected with the sliding block, and the draw bar is provided with a first inclined surface which is in contact with the first end of the sliding block.

[0009] The pressing cover is detachably connected to the open end of the base body, and a first recess is arranged on the sidewall of the open end of the base body corresponding to the position of the sliding block, and the second end of the sliding block is located in the first recess;

[0010] An end of the pressing cover towards the base body is provided with a second recess, and the first end of the sliding block is provided with a limiting part extending towards the second recess, and the sidewall of the second recess is located on the displacement path of the limiting part;

[0011] The first end of the pull rod is arranged on the base body, and the second end of the pull rod extends outwards after passing through the pressing cover.

[0012] In one of the embodiments, the first end of the sliding block is provided with a second bevel or a circular arc transition surface in contact with the first bevel;

[0013] The first end of the first bevel faces the first end of the pull rod, and the second end of the first bevel faces the second end of the pull rod;

[0014] The height of the first end of the first bevel on the side of the pull rod is lower than that of the second end of the first bevel.

[0015] In one of the embodiments, the base frame comprises a base body and a pressing cover, and one end of the base body is provided with an opening;

[0016] The pressing cover is detachably connected to the open end of the base body, and a first recess is arranged on the sidewall of the open end of the base body corresponding to the position of the sliding block, and the second end of the sliding block is located in the first recess;

[0017] The bottom of the first recess is provided with a second recess, and the first end of the sliding block is provided with a limiting part extending towards the second recess, and the sidewall of the second recess is located on the displacement path of the limiting part;

[0018] The first end of the pull rod is arranged on the base body, and the second end of the pull rod extends outwards after passing through the pressing cover.

[0019] In one of the embodiments, the first end of the sliding block is provided with a second bevel or a circular arc transition surface in contact with the first bevel;

[0020] The first end of the first bevel faces the first end of the pull rod, and the second end of the first bevel faces the second end of the pull rod;

[0021] The height of the first end of the first bevel on the side of the pull rod is lower than that of the second end of the first bevel.

[0022] In one of the embodiments, a threaded hole is arranged on the base body, and the first end of the pull rod is threadedly connected to the threaded hole.

[0023] In one embodiment, the open end of the substrate is provided with a third countersunk hole, and the side of the pull rod is clearance-fitted with the side wall of the third countersunk hole;

[0024] The threaded hole is located at the bottom of the third countersunk hole.

[0025] In one embodiment, the second end of the pull rod is provided with a through hole that extends radially through the pull rod, for assisting in loosening or tightening the pull rod.

[0026] In one embodiment, the gland is detachably connected to the base by a plurality of screws distributed circumferentially.

[0027] In one embodiment, a magnetic attraction structure is provided between the slider and the pull rod and / or the base frame, so that the slider can retract into the base frame under the action of magnetic force. The base frame, the pull rod and the claw mechanism are all made of steel.

[0028] Compared with the prior art, the present invention has the following beneficial technical effects:

[0029] 1. The guide sleeve disassembly device of this utility model sets a slider that can be radially displaced on the base frame, and uses the axial displacement of the pull rod to drive the slider to slide, so that the slider that slides out of the side of the base frame can be locked into the end of the guide sleeve. By applying disassembly pressure or tension to the base frame, the disassembly of the guide sleeve can be completed without damaging the guide sleeve, which can effectively avoid frequent replacement of the guide sleeve and save the cost of use.

[0030] 2. The guide sleeve disassembly device in this utility model can withstand greater disassembly pressure and has a longer service life compared to conventional pullers or punches;

[0031] 3. The guide sleeve disassembly device in this utility model has a simple structure and strong versatility. It can be applied to the disassembly of most guide sleeves, making it easy to use on construction sites. It has strong promotion and reference value. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 This is an isometric view of the guide sleeve disassembly device in this embodiment of the present invention when the chuck mechanism is open;

[0034] Figure 2This is an isometric view of the guide sleeve disassembly device in this embodiment of the present invention when the chuck mechanism retracts;

[0035] Figure 3 This is a cross-sectional view of the guide sleeve disassembly device in an embodiment of this utility model;

[0036] Figure 4 This is a cross-sectional view of the substrate in an embodiment of the present invention;

[0037] Figure 5 This is a side view of the pull rod in an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram illustrating the disassembly principle of the guide sleeve disassembly device in this embodiment of the present invention.

[0039] Reference numerals: 1. Pull rod, 101. First oblique surface, 102. Through hole, 2. Slider, 201. Base, 3. First countersunk groove, 301. Threaded hole, 302. Hexagonal head structure, 303. Third countersunk hole, 304. Pressure cap, 4. Second countersunk groove, 401. Screw, 5. Guide sleeve, 6. Disassembly groove, 601.

[0040] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0043] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal connection of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0046] like Figure 1 , Figure 2 The diagram shows a guide sleeve disassembly device disclosed in this embodiment, which mainly includes a base frame, a pull rod 1, and a claw mechanism. Specifically, the claw mechanism includes at least one slider 2, which is disposed on the base frame. The slider 2 has a radial displacement stroke on the base frame, and when there are two or more sliders 2, each slider 2 is distributed circumferentially on the base frame. The first end of the pull rod 1 is disposed on the base frame, and the second end of the pull rod 1 is located outside the base frame, and the pull rod 1 has an axial displacement stroke on the base frame. The pull rod 1 has a first oblique surface 101 that contacts and engages with the first end of the slider 2. As the pull rod 1 moves axially, the engagement position between the first end of the slider 2 and the first oblique surface 101 changes, thereby changing the radial position of the slider 2, so that the second end of the slider 2 can extend out of the side of the base frame or retract into the base frame during the axial displacement of the pull rod 1. The slider 2, which slides out from the side of the base frame, can be engaged with the end of the guide sleeve 6. By applying disassembly pressure or tension to the base frame, the guide sleeve 6 can be disassembled without damaging it, which can effectively avoid frequent replacement of the guide sleeve 6 and save on usage costs.

[0047] refer to Figure 3 , Figure 4The base frame includes a base body 3 and a pressure cap 4. The base body 3 is a columnar structure with one open end, and the pressure cap 4 is a ring-shaped structure. The pressure cap 4 is detachably connected to the open end of the base body 3 by multiple screws 5 distributed circumferentially. A first recess 301 is provided on the side wall of the open end of the base body 3 corresponding to the position of the slider 2, and the second end of the slider 2 is located in the corresponding first recess 301. A second recess 401 is provided on the end of the pressure cap 4 facing the base body 3. A limiting part 201 extending towards the second recess 401 is provided on the first end of the slider 2. The side wall of the second recess 401 is located on the displacement path of the limiting part 201, thereby limiting the travel of the slider 2 in the radial direction and preventing the slider 2 from sliding off the base frame.

[0048] refer to Figure 3 , Figure 5 The first end of the pull rod 1 is located on the base 3, and the second end of the pull rod 1 extends outward after passing through the pressure cap 4. The first end of the slider 2 has a second oblique surface or arc transition surface that contacts and engages with the first oblique surface 101. The first end of the first oblique surface 101 faces the first end of the pull rod 1, and the second end of the first oblique surface 101 faces the second end of the pull rod 1. At the same time, the height of the first end of the first oblique surface 101 on the side of the pull rod 1 is higher than that of the second end of the first oblique surface 101.

[0049] Since the first end of slider 2 is in contact with the first oblique surface 101, and the height of the first end of the first oblique surface 101 on the side of the pull rod 1 is higher than that of the second end of the first oblique surface 101, when the pull rod 1 moves towards its second end, it will cause slider 2 to move radially outward, so that the second end of slider 2 extends outward from the side of the base frame. When the pull rod 1 moves towards its first end, it will create space for slider 2 to move radially inward, at which point slider 2 can be manually retracted into the base frame.

[0050] Preferably, a magnetic attraction structure can be provided between the slider 2 and the pull rod 1 and / or the base frame, so that when the pull rod 1 allows the slider 2 to move radially inward, the slider 2 can automatically retract into the base frame under the action of magnetic force. For example, a portion of the pull rod corresponding to the position of the first oblique surface 101 can be directly set as a permanent magnet, and the slider 2 can be made of strongly magnetic carbon steel. Alternatively, a ring of permanent magnets can be arranged on the pressure cap 4 at the position corresponding to the bottom of the second sink 401, which can also pull the slider 2 back into the base frame when the slider 2 has the space to move radially inward. Furthermore, in order to ensure the stability of the magnetic attraction structure, permanent magnets can also be arranged on both the pull rod 1 and the pressure rod 4.

[0051] In practical implementation, a conical segment of a rotating structure can be directly arranged on the tie rod 1 at the position corresponding to the first oblique surface 101, with the first oblique surface 101 serving as the sidewall of the conical segment. Alternatively, a wedge-shaped protrusion can be arranged on the tie rod 1 at the position corresponding to the first oblique surface 101, with the first oblique surface 101 serving as the outer wall surface of the wedge-shaped protrusion.

[0052] It is worth noting that in specific applications, it is not limited to using... Figures 3 to 5 In the illustrated embodiment, the second sinker is not placed on the pressure cap 4, but is instead placed at the bottom of the first sinker 301. A limiting portion extending towards the second sinker is also provided at the first end of the slider 2, and the sidewall of the second sinker is also located on the displacement path of the limiting portion. In this embodiment, the height of the first end of the first beveled surface 101 on the side of the pull rod is lower than that of the second end of the first beveled surface 101. Therefore, when the pull rod 1 moves towards its first end, it will cause the slider 2 to move radially outward, causing the second end of the slider 2 to extend beyond the side of the base frame. When the pull rod 1 moves towards its second end, it will create space for the slider 2 to move radially inward, at which point the slider 2 can be manually retracted into the base frame.

[0053] In the specific implementation process, the base 3 is provided with a threaded hole 302. The first end of the pull rod 1 is threadedly connected to the threaded hole 302, so that the axial displacement of the pull rod 1 on the base 3 can be achieved by rotating the pull rod 1. This allows the pull rod 1 to achieve axial displacement while also having a certain axial self-limiting effect, effectively preventing the pull rod 1 from moving axially during the disassembly of the guide sleeve 6. Preferably, the second end of the pull rod 1 is provided with a through hole 102 that penetrates the pull rod 1 radially, so that a pin can be inserted to assist in loosening or tightening the pull rod 1. More preferably, the side wall of the closed end of the base 3 can be set as a hexagonal head structure 303, which is convenient for fixing to cooperate with loosening or tightening the pull rod 1 and prevents the base 3 from rotating along with the pull rod 1 when it is loosened or tightened. More preferably, the side wall of the closed end of the base 3 can also be set as other structures that are easy to fix, such as a square head structure.

[0054] In a preferred embodiment, the open end of the base 3 is provided with a third countersunk hole 304, the side of the pull rod 1 is clearance-fitted with the side wall of the third countersunk hole 304, and the threaded hole 302 is provided at the bottom of the third countersunk hole 304. By providing a third countersunk hole 304 on the base 3 that can clearance-fit with the pull rod 1, the radial wobbling of the pull rod 1 is effectively prevented.

[0055] In this embodiment, considering that the guide sleeve 6 disassembly device is subjected to a large pressure during operation, the base frame, tie rod 1 and claw mechanism are preferably made of steel.

[0056] by Figures 3 to 5Taking the illustrated embodiment as an example, the assembly process of the guide sleeve disassembly device in this embodiment is as follows:

[0057] First, screw the first end of the pull rod 1 into the threaded hole 302 of the base 3;

[0058] Then, each slider 2 is installed into the corresponding first groove 301 on the base, and the slider 2 is pushed with a finger to check whether the slider 2 moves smoothly. If necessary, grease can be applied to the surface of the first groove 301 and the slider 2 to ensure that the slider 2 slides smoothly.

[0059] Then, the pressure cap 4 is passed through the pull rod 1, and the pressure cap 4 is fixed to the base 3 by the screw 5, so that the nut of the screw 5 is pressed against the pressure cap 4.

[0060] Finally, loosening the tie rod 1 causes it to shift axially to the left or right on the base 3:

[0061] When the pull rod 1 is loosened, i.e., when the pull rod 1 moves to the left, the first oblique surface 101 of the pull rod 1 contacts the first end of the slider 2, and pushes the slider 2 to move radially outward. The chuck mechanism opens, and the slider 2 is in a position similar to... Figure 1 The state shown;

[0062] When the pull rod 1 is tightened, i.e., when the pull rod 1 moves to the right, the first oblique surface 101 of the pull rod 1 disengages from the first end of the slider 2. The slider 2 can then be pushed radially inward with a finger or tool, causing the chuck mechanism to retract and reach a position similar to... Figure 2 The state shown is such that the outer circle of the chuck mechanism after shrinking is lower than the maximum outer circle of the base 3.

[0063] by Figures 3 to 5 Taking the illustrated embodiment as an example, the working process of the guide sleeve disassembly device in this embodiment is as follows:

[0064] First, tighten the pull rod 1 so that the first oblique surface 101 of the pull rod 1 is disengaged from the first end of the slider 2. The claw mechanism moves radially inward. Use your fingers or tools to push the claw mechanism to retract, ensuring that the outer circle of the claw mechanism after retraction is lower than the maximum outer circle of the base 3.

[0065] Subsequently, the guide sleeve disassembly device is passed through the inner hole of the guide sleeve 6, ensuring that the position of the claw mechanism is near the disassembly groove 601 above the guide sleeve 6. The pull rod 1 is loosened, causing the first oblique surface 101 of the pull rod 1 to contact the first end of the slider 2, pushing the claw mechanism to open, so that the second end of the slider 2 is engaged in the disassembly groove 601 above the guide sleeve 6. Figure 6 As shown;

[0066] After confirming that the claw mechanism is fully engaged in the disassembly groove 601, use a hammer to strike the closed end of the base 3 to remove the guide sleeve 6. If the outer diameter of the guide sleeve 6 has a large interference fit, it is difficult to disassemble it with a hammer. Alternatively, a press can be used to apply the disassembly force instead of a hammer.

[0067] The guide sleeve removal device in this embodiment can apply pressure without damaging the guide sleeve during the entire removal process, avoiding frequent replacement of the guide sleeve and saving usage costs. At the same time, the tool structure can withstand greater removal pressure, has a longer service life than ordinary pullers, and has a simple and versatile structure, which can be applied to the removal of most guide sleeves. It is also easy to use on construction sites and has high removal efficiency.

[0068] The above description is only a preferred embodiment of the present utility model and does not limit the scope of protection of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A guide sleeve disassembly device, characterized in that, It includes a base frame, a tie rod, and a claw mechanism, wherein the claw mechanism includes at least one slider; The slider is disposed on the base frame, and the slider has a radial displacement stroke on the base frame. When there are two or more sliders, each slider is distributed circumferentially on the base frame. The first end of the tie rod is located on the base frame, the second end of the tie rod is located outside the base frame, and the tie rod has a stroke of axial displacement on the base frame; The pull rod has a first oblique surface that contacts and engages with the first end of the slider, so that the second end of the slider extends out of the side of the base frame or retracts into the base frame during the axial displacement of the pull rod.

2. The guide sleeve disassembly device according to claim 1, characterized in that, The base frame includes a base body and a pressure cap, and one end of the base body has an opening; The pressure cap is detachably connected to the open end of the base, and a first groove is provided on the side wall of the open end of the base corresponding to the position of the slider, and the second end of the slider is located in the corresponding first groove; The end of the pressure cap facing the base is provided with a second recess, and the first end of the slider is provided with a limiting part extending in the direction of the second recess. The sidewall of the second recess is located on the displacement path of the limiting part. The first end of the pull rod is located on the base, and the second end of the pull rod extends outward after passing through the pressure cap.

3. The guide sleeve disassembly device according to claim 2, characterized in that, The first end of the slider has a second oblique surface or a circular arc transition surface that contacts and engages with the first oblique surface. The first end of the first beveled surface faces the first end of the pull rod, and the second end of the first beveled surface faces the second end of the pull rod; The first end of the first beveled surface is at a higher height than the second end of the first beveled surface on the side of the pull rod.

4. The guide sleeve disassembly device according to claim 1, characterized in that, The base frame includes a base body and a pressure cap, and one end of the base body has an opening; The pressure cap is detachably connected to the open end of the base, and a first groove is provided on the side wall of the open end of the base corresponding to the position of the slider, and the second end of the slider is located in the corresponding first groove; The bottom of the first sinking tank is provided with a second sinking tank, and the first end of the slider is provided with a limiting part extending towards the second sinking tank. The side wall of the second sinking tank is located on the displacement path of the limiting part. The first end of the pull rod is located on the base, and the second end of the pull rod extends outward after passing through the pressure cap.

5. The guide sleeve disassembly device according to claim 4, characterized in that, The first end of the slider has a second oblique surface or a circular arc transition surface that contacts and engages with the first oblique surface. The first end of the first beveled surface faces the first end of the pull rod, and the second end of the first beveled surface faces the second end of the pull rod; The first end of the first beveled surface is at a lower height than the second end of the first beveled surface on the side of the pull rod.

6. The guide sleeve disassembly device according to any one of claims 2 to 5, characterized in that, The base is provided with a threaded hole, and the first end of the pull rod is threadedly connected to the threaded hole.

7. The guide sleeve disassembly device according to claim 6, characterized in that, The open end of the base is provided with a third countersunk hole, and the side of the pull rod is clearance-fitted with the side wall of the third countersunk hole; The threaded hole is located at the bottom of the third countersunk hole.

8. The guide sleeve disassembly device according to claim 6, characterized in that, The second end of the pull rod is provided with a through hole that extends radially through the pull rod, which is used to assist in loosening or tightening the pull rod.

9. The guide sleeve disassembly device according to any one of claims 2 to 5, characterized in that, The gland is detachably connected to the base by a plurality of screws distributed circumferentially.

10. The guide sleeve disassembly device according to any one of claims 1 to 5, characterized in that, A magnetic attraction structure is provided between the slider and the pull rod and / or the base frame, so that the slider can retract into the base frame under the action of magnetic force.

Images