Sleeve dismantling mechanism and dismantling device

Abstract

The invention discloses a sleeve dismantling mechanism, which is used for dismantling a nylon sleeve arranged in a stainless steel sleeve, and comprises a main shaft, a first guide sleeve, a spring, a second guide sleeve and a drill bit, a drill bit is arranged at the lower end of the spindle; a hexagonal head is arranged at the top of the main shaft; the circumferential outer wall of the main shaft is sequentially sleeved with a second guide sleeve, a spring and a first guide sleeve from top to bottom; the second guide sleeve, the spring and the first guide sleeve are positioned between the hexagonal head and the drill bit; the drill bit is used for cutting the nylon sleeve arranged in the stainless steel sleeve; and the first guide sleeve and the second guide sleeve are used for guiding and restraining the moving path of the drill bit in the stainless steel sleeve. The device can conveniently and reliably take out the old nylon sleeve in the pre-embedded nut set, timely clean the residual nylon sleeve, remarkably improve the replacement work efficiency of the nylon sleeve, reduce the labor intensity of workers, and have great practical significance.

Description

Technical Field

[0001] The invention relates to the technical field of railway transportation, and in particular to a casing removal mechanism and a removal device. Background Art

[0002] In the field of rail transport, see Figures 1 to 4 As shown, for the railway concrete track plate 1000 used to support the rails, the embedded parts thereon are mostly embedded nut groups 2000, and the embedded nut groups 2000 include a stainless steel sleeve 2 and a nylon sleeve 3. The nylon sleeve 3 is embedded in the hollow stainless steel sleeve 2 and is threadedly connected to the stainless steel sleeve 2 (the external thread on the nylon sleeve is threadedly connected to the internal thread of the stainless steel sleeve).

[0003] Since the embedded nut set 2000 is in the form of a spiral nylon sleeve plus a stainless steel sleeve, if the nylon sleeve is damaged during use, it is necessary to replace the nylon sleeve, that is, take out the old nylon sleeve and install a new one.

[0004] During the replacement process, the nylon material is prone to aging, resulting in a decrease in strength, which can easily cause the nylon sleeve to break (for example, break in the middle), and the part remaining in the stainless steel sleeve is difficult to clean (for example, a small tool is usually used to break the nylon sleeve bit by bit), which makes replacement very difficult and easily damages the stainless steel sleeve, seriously affecting the daily maintenance quality and efficiency of the embedded nut group and increasing the workload of the staff.

[0005] Therefore, there is an urgent need to develop a technology that can solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a casing removal mechanism and a removal device in view of the technical defects in the prior art.

[0007] To this end, the present invention provides a casing removal mechanism for removing a nylon casing arranged in a stainless steel casing, the casing removal mechanism comprising: a main shaft, a first guide sleeve, a spring, a second guide sleeve and a drill bit;

[0008] The lower end of the main shaft is provided with a drill bit;

[0009] The top of the spindle is provided with a hexagonal head;

[0010] The circumferential outer wall of the main shaft is covered with a second guide sleeve, a spring, and a first guide sleeve in sequence from top to bottom;

[0011] The second guide sleeve, the spring and the first guide sleeve are located between the hexagonal head and the drill bit;

[0012] A drill bit is used to cut the nylon casing set in the stainless steel casing;

[0013] The first guide sleeve and the second guide sleeve are used to guide and constrain the moving path of the drill bit in the stainless steel sleeve.

[0014] In addition, the present invention provides a casing removal device, comprising the casing removal mechanism as described above, and an electric wrench;

[0015] The power output end of the electric wrench is connected to the top of the main shaft in the casing removal mechanism.

[0016] It can be seen from the technical solution provided by the present invention that, compared with the prior art, the present invention provides a sleeve removal mechanism and a removal device, which have a scientific structural design and can conveniently and reliably remove the old nylon sleeve in the embedded nut group, and clean up the remaining nylon sleeve in time, which significantly improves the efficiency of replacing the nylon sleeve and reduces the labor intensity of the staff, and has great practical significance.

[0017] By applying the present invention, the residual nylon sleeve can be cleaned conveniently and quickly, the working time of replacing the nylon sleeve can be greatly shortened, and due to the guide design, damage to the stainless steel sleeve can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure when a plurality of embedded nut groups are arranged on a railway concrete track slab;

[0019] Figure 2 This is a schematic diagram of the structure of a pre-embedded nut group with a complete structure. At this time, the nylon sleeve is in a normal and undamaged state;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of a stainless steel sleeve included in a pre-embedded nut set;

[0021] Figure 4 A schematic diagram of a three-dimensional structure of a nylon sleeve included in a pre-embedded nut set;

[0022] Figure 5 A three-dimensional structural schematic diagram of a casing removal mechanism provided by the present invention;

[0023] Figure 6 A schematic diagram of a three-dimensional explosion decomposition structure of a casing removal mechanism provided by the present invention;

[0024] Figure 7 A front structural schematic diagram of a casing removal mechanism provided by the present invention;

[0025] Figure 8A schematic diagram of an initial working state of a sleeve removal mechanism provided by the present invention when performing a removal and cleaning operation on a nylon sleeve with only a middle and lower threaded section of the nylon sleeve remaining;

[0026] Fig. 9 A schematic diagram of a sleeve removal mechanism provided by the present invention, in which a spring on the mechanism is in a pressed state and the removal of all nylon sleeves is about to be completed;

[0027] In the figure: 1. casing removal mechanism; 2. stainless steel casing; 3. nylon casing;

[0028] 10. spindle, 11. first guide sleeve, 12. spring, 13. second guide sleeve, 14. drill bit, 15. cylindrical pin;

[0029] 1000. Concrete track slab for railway. 2000. Embedded nut set. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] See also Figures 1 to 9 The present invention provides a casing removal mechanism for removing a nylon casing 3 disposed in a stainless steel casing 2, the mechanism comprising: a spindle 10, a first guide casing 11, a spring 12, a second guide casing 13 and a drill bit 14;

[0035] A drill bit 14 is provided at the lower end of the spindle 10;

[0036] A hexagonal head 101 is provided at the top of the main shaft 10;

[0037] The circumferential outer wall of the main shaft 10 is covered with a second guide sleeve 13, a spring 12, and a first guide sleeve 11 in sequence from top to bottom;

[0038] The second guide sleeve 13, the spring 12 and the first guide sleeve 11 are located between the hexagonal head 101 and the drill bit 14;

[0039] The drill bit 14 is used to perform cutting operation on the nylon sleeve 3 provided in the stainless steel sleeve 2; specifically, it can be: starting from the non-threaded section 201 side of the upper end of the stainless steel sleeve 2, the nylon sleeve 3 provided in the stainless steel sleeve 2 is cut.

[0040] The first guide sleeve 11 and the second guide sleeve 13 are used to guide the movement path of the drill bit 14 in the stainless steel sleeve 2 .

[0041] In the present invention, in a specific implementation, the stainless steel sleeve 2 includes a hollow stainless steel sleeve upper non-threaded section 201 and a hollow stainless steel sleeve middle and lower threaded section 202;

[0042] The non-threaded section 201 at the upper end of the stainless steel sleeve is located on top of the threaded section 202 at the middle and lower part of the stainless steel sleeve;

[0043] The nylon sleeve 3 (i.e., a complete, undamaged nylon sleeve) comprises a hollow nylon sleeve upper non-threaded section 301 and a hollow nylon sleeve middle and lower threaded section 302;

[0044] The non-threaded section 301 at the upper end of the nylon sleeve is located on the top of the threaded section 302 at the middle and lower part of the nylon sleeve;

[0045] The lower threaded section 302 of the nylon sleeve is threadedly connected to the lower threaded section 202 of the stainless steel sleeve (the external thread on the lower threaded section 302 of the nylon sleeve is threadedly connected to the internal thread on the lower threaded section 202 of the stainless steel sleeve).

[0046] In specific implementation, the overall shape of the non-threaded section 201 at the upper end of the stainless steel sleeve is a hollow cylinder;

[0047] The inner side of the lower threaded section 202 of the stainless steel sleeve has a spirally distributed internal thread;

[0048] In specific implementation, the overall shape of the non-threaded section 301 at the upper end of the nylon sleeve is a hollow cylinder;

[0049] The outer side of the lower threaded section 302 of the nylon sleeve has a spirally distributed internal thread;

[0050] The bottom of the lower threaded section 302 in the nylon sleeve is sealed.

[0051] In the present invention, in a specific implementation, a circular guide sleeve baffle 102 is provided at the bottom of the hexagonal head 101;

[0052] The guide sleeve baffle 102 is disposed on the upper circumferential outer wall of the main shaft 10 .

[0053] In a specific implementation, the main shaft 10, the hexagonal head 101 and the guide sleeve baffle 102 are integrally formed.

[0054] In the present invention, in a specific implementation, the lower end of the main shaft 10 is connected (fixedly connected) to the top of the drill bit 14 through a cylindrical pin 15.

[0055] In specific implementation, the top of the drill bit 14 is provided with a concave spindle accommodating groove 1401;

[0056] The lower end of the spindle 10 is located in the spindle receiving groove 1401;

[0057] The lower end of the main shaft 10 is provided with radially distributed cylindrical pin mounting holes 103;

[0058] The drill bit 14 is provided with a cylindrical pin embedding hole 1402 at a position corresponding to the cylindrical pin mounting hole 102;

[0059] After the cylindrical pin 15 passes through the cylindrical pin embedding hole 1402 on the drill bit 14, it is connected (for example, plugged) to the cylindrical pin mounting hole 103 at the lower end of the spindle 10;

[0060] Furthermore, the cylindrical pin mounting hole 103 is a through hole.

[0061] Furthermore, the spindle accommodating groove 1401 at the top of the drill bit 14 is clearance-fitted with the lower end of the spindle 10 .

[0062] It should be noted that the overall shape of the main shaft 10 is cylindrical.

[0063] Furthermore, the cylindrical pin 15 is interference fit with the cylindrical pin embedding hole 1402 and the cylindrical pin mounting hole 103 , so that the cylindrical pin 15 is not easy to fall off from the drill bit 14 and the main shaft 10 .

[0064] It should be noted that the drill bit 14 is fixed to the spindle 10 by a cylindrical pin 15. When the cylindrical pin 15 is installed with an interference fit, the cylindrical pin 15 is pressed into the through hole on the drill bit 14 and the spindle 10 by an existing press.

[0065] In the present invention, in a specific implementation, the spring 12 is a spiral spring.

[0066] In the present invention, in a specific implementation, the second guide sleeve 13 and the first guide sleeve 11 are respectively provided with a second limiting convex ring 1301 and a first limiting convex ring 110 on opposite sides;

[0067] The upper and lower ends of the spring 12 are respectively sleeved on the circumferential outer sides of the second limiting protruding ring 1301 and the first limiting protruding ring 110 .

[0068] In a specific implementation, the second limiting protruding ring 1301 and the first limiting protruding ring 110 are in the shape of a circular ring.

[0069] In the present invention, in specific implementation, the second guide sleeve 13 and the first guide sleeve 11 are structures symmetrically distributed up and down;

[0070] In the present invention, in a specific implementation, the diameter of the central through hole of the second guide sleeve 13 and the first guide sleeve 11 is larger than the diameter of the main shaft 10 .

[0071] In the present invention, in a specific implementation, the spring 12 , the second guide sleeve 13 , the first guide sleeve 11 , and the main shaft 10 are all clearance-fitted.

[0072] In the present invention, in a specific implementation, the diameter of the lower end of the central through hole of the first guide sleeve 11 (ie, the inner diameter of the first guide sleeve 11 ) is smaller than the outer diameter of the drill bit 14 .

[0073] It should be noted that the outer diameter of the drill bit 14 is larger than the inner diameter of the first guide sleeve 11, and can block the first guide sleeve 11 to prevent it from falling off.

[0074] In the present invention, in a specific implementation, the outer diameters of the first guide sleeve 11 and the second guide sleeve 13 are larger than the outer diameter of the drill bit 14;

[0075] That is to say, the projection area of ​​the drill bit 14 on the horizontal plane is located within the projection areas of the first guide sleeve 11 and the second guide sleeve 13 on the horizontal plane;

[0076] The outer diameters of the first guide sleeve 11 and the second guide sleeve 13 are smaller than the inner diameter of the non-threaded section 201 at the upper end of the stainless steel sleeve of the stainless steel sleeve 2 installed by the nylon sleeve 3 to be removed (cleaned);

[0077] In specific implementation, the outer diameters of the first guide sleeve 11 and the second guide sleeve 13 are larger than the inner diameter of the lower threaded section 202 of the stainless sleeve. Therefore, the first guide sleeve 11 will not extend into the central inner hole of the lower threaded section 202 of the stainless sleeve, but will be blocked in the central inner hole of the upper non-threaded section 201 of the stainless sleeve.

[0078] It should be noted that due to the guiding function of the first guide sleeve 11 and the second guide sleeve 13, and the outer diameter of the first guide sleeve 11 and the second guide sleeve 13 is greater than the outer diameter of the drill bit 14, the movement direction and position of the drill bit can be constrained, so that when the drill bit 13 contacts the nylon sleeve 3, the remaining nylon sleeve can be cleaned without damaging the stainless steel sleeve 2.

[0079] In the present invention, in a specific implementation, a plurality of blades 1401 are provided at the lower end of the drill bit 14 .

[0080] In a specific implementation, the outer edge of the blade 1401 is flush with the circumferential side wall of the upper end of the drill bit 14 .

[0081] It should be noted that, in the present invention, the blade 1401 can be a common cutting blade, and the width only needs to cover the thickness of the nylon sleeve 3 .

[0082] Based on the above-mentioned casing removal mechanism provided by the present invention, the present invention further provides a casing removal device, which comprises the casing removal mechanism 1 as described above, and an electric wrench;

[0083] The power output end (eg, chuck) of the electric wrench is connected to the top of the main shaft 10 in the casing removal mechanism 1 (specifically, the hexagonal head 101 at the top).

[0084] In the present invention, in a specific implementation, the power output end of the electric wrench, for example the chuck of the electric wrench, and the chuck and the top of the main shaft 10 in the sleeve removal mechanism 1 (specifically the hexagonal head 101 at the top) can be clamped or snapped together, or other reliable connection methods can be used.

[0085] It should be noted that the electric wrench is preferably a brushless electric wrench. The electric wrench is also called an electric screwdriver or an electric hand drill. It is a general tool with mature prior art and has been widely used, and will not be described in detail here.

[0086] In the present invention, in a specific implementation, the casing removal device further includes: a blower and / or an air gun;

[0087] The blower and / or air gun is used to blow out the chips generated by the drill bit 14 during the cutting of the nylon sleeve 3 from the stainless steel sleeve 2.

[0088] In order to more clearly understand the technical solution of the present invention, the working process of the present invention is described below.

[0089] The first step is to use an electric wrench (universal tool) to connect the hexagonal head 101 on the top of the spindle 10;

[0090] Step 2, see Figure 8 As shown, for an embedded nut column 2000 that needs to remove the nylon sleeve 3, the first guide sleeve 11 at the lower part of the main shaft 10 is placed in the non-threaded area on the upper part of the stainless steel sleeve 2 of the embedded nut column 2000 (i.e., the inner side of the non-threaded section 201 at the upper end of the stainless steel sleeve);

[0091] Among them, the outer diameter of the first guide sleeve 11 is smaller than the inner diameter of the non-threaded section 201 at the upper end of the stainless steel sleeve, ensuring that the first guide sleeve 11 will not extend into the central inner hole of the lower threaded section 202 of the stainless steel sleeve and will be blocked in the central inner hole of the non-threaded section 201 at the upper end of the stainless steel sleeve.

[0092] It should be noted that see Figure 4 As shown, for the intact and complete nylon sleeve 3, the non-threaded section 301 at the upper end of the nylon sleeve 3 has a notch 3010 (similar to the cross or straight notch of a slotted bolt), which can be unscrewed using a matching original special tool like a screw.

[0093] The sleeve removal mechanism of the present invention performs removal operations when the notch on the non-threaded section 301 at the upper end of the nylon sleeve is damaged (for example, when only the threaded section 302 at the middle and lower part of the nylon sleeve remains).

[0094] The sleeve removal mechanism of the present invention cannot and does not need to remove the complete nylon sleeve. The complete nylon sleeve is relatively convenient to remove. The sleeve removal mechanism of the present invention is only suitable for broken nylon sleeves. Without using the sleeve removal mechanism of the present invention, the broken nylon sleeve is very difficult to remove, and the on-site operation time is very long.

[0095] Step 3, see Figure 8 As shown, the staff presses the switch of the electric wrench to start the electric wrench, so that the electric wrench drives the main shaft 10 and the drill bit 14 to rotate clockwise, and while the staff presses the compression spring 12 downward, the drill bit 14 starts to cut the nylon sleeve 3 (specifically, the remaining lower threaded section 302 of the nylon sleeve), and gradually moves downward;

[0096] It should be noted that, by applying a certain downward pressure, the staff can make the drill bit 14 rotating at the bottom contact the nylon sleeve 3 and cut it;

[0097] Step 4, see Fig. 9 As shown, as the nylon sleeve 3 is cut and gradually becomes shorter, the staff gradually increases the downward pressure to compress the spring 12, and finally cleans all the nylon sleeves.

[0098] Among them, during the execution of the first step, that is, in the middle of the dismantling and cleaning, if the chips (i.e., the debris of the nylon sleeve cut out by the drill bit 14) accumulate too much, the dismantling mechanism of the present invention is taken out first, and the chips are cleaned up (at this time, a handheld hair dryer or an on-site air gun can be used to blow the chips out of the stainless steel sleeve 2), and the above process is repeated until the nylon sleeve is completely cleaned.

[0099] After cleaning, a new nylon sleeve 3 can be screwed in to complete the replacement work.

[0100] Compared with the prior art, the sleeve removal mechanism and removal device provided by the present invention have the following advantages:

[0101] Beneficial effects:

[0102] 1. The sleeve removal mechanism of the present invention can be used with a common electric wrench on site to clean the residual nylon sleeve in the stainless steel sleeve.

[0103] 2. The present invention is designed with two guide sleeves distributed up and down, and the drill bit can clean most of the nylon sleeves without damaging the stainless steel sleeve.

[0104] 3. Since common universal electric wrenches generally do not have a lifting function, the drill bit 14 can be lifted by the spring 12 located between the first guide sleeve 11 and the second guide sleeve 13 to prevent the drill bit 14 from getting stuck on the nylon sleeve 3 and being difficult to pull out.

[0105] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A casing removal mechanism, characterized in that: Used for removing a nylon sleeve (3) arranged in a stainless steel sleeve (2), the sleeve removal mechanism comprises: a main shaft (10), a first guide sleeve (11), a spring (12), a second guide sleeve (13) and a drill bit (14); A drill bit (14) is provided at the lower end of the main shaft (10); The top of the main shaft (10) is provided with a hexagonal head (101); The circumferential outer wall of the main shaft (10) is covered with a second guide sleeve (13), a spring (12), and a first guide sleeve (11) in sequence from top to bottom; The second guide sleeve (13), the spring (12) and the first guide sleeve (11) are located between the hexagonal head (101) and the drill bit (14); A drill bit (14) is used to perform a cutting operation on a nylon sleeve (3) disposed in the stainless steel sleeve (2); The first guide sleeve (11) and the second guide sleeve (13) are used to guide and constrain the moving path of the drill bit (14) in the stainless steel sleeve (2).

2. The sleeve removal mechanism according to claim 1, characterized in that: A circular guide sleeve baffle (102) is provided at the bottom of the hexagonal head (101); The guide sleeve baffle (102) is arranged on the upper circumferential outer wall of the main shaft (10).

3. The sleeve removal mechanism according to claim 2, characterized in that: The main shaft (10), the hexagonal head (101) and the guide sleeve baffle (102) are integrally formed.

4. The sleeve removal mechanism according to claim 1, characterized in that: The lower end of the main shaft (10) is connected to the top of the drill bit (14) through a cylindrical pin (15).

5. The sleeve removal mechanism according to claim 4, characterized in that: The top of the drill bit (14) is provided with a concave main shaft accommodating groove (1401); The lower end of the main shaft (10) is located in the main shaft accommodating groove (1401); The lower end of the main shaft (10) is provided with radially distributed cylindrical pin mounting holes (103); The drill bit (14) is provided with a cylindrical pin embedding hole (1402) at a position corresponding to the cylindrical pin mounting hole (102); After the cylindrical pin (15) passes through the cylindrical pin embedding hole (1402) on the drill bit (14), it is connected to the cylindrical pin mounting hole (103) at the lower end of the main shaft (10).

6. The sleeve removal mechanism according to claim 5, characterized in that: The main shaft receiving groove (1401) at the top of the drill bit (14) is clearance-fitted with the lower end of the main shaft (10); The cylindrical pin (15), the cylindrical pin embedding hole (1402) and the cylindrical pin mounting hole (103) are all interference fit.

7. The sleeve removal mechanism according to claim 1, characterized in that: The spring (12) is a spiral spring; The second guide sleeve (13) and the first guide sleeve (11) are provided with a second limiting convex ring (1301) and a first limiting convex ring (110) respectively on opposite sides; The upper and lower ends of the spring (12) are respectively sleeved on the circumferential outer sides of the second limiting protruding ring (1301) and the first limiting protruding ring (110).

8. The casing removal mechanism according to any one of claims 1 to 7, characterized in that: The second guide sleeve (13) and the first guide sleeve (11) are symmetrically distributed up and down. The spring (12), the second guide sleeve (13) and the first guide sleeve (11) are all clearance-fitted with the main shaft (10); The inner diameter of the first guide sleeve (11) is smaller than the outer diameter of the drill bit (14) The outer diameters of the first guide sleeve (11) and the second guide sleeve (13) are greater than the outer diameter of the drill bit (14); The outer diameters of the first guide sleeve (11) and the second guide sleeve (13) are smaller than the inner diameter of the non-threaded section (201) at the upper end of the stainless steel sleeve of the stainless steel sleeve (2).

9. A casing removal device, characterized in that: A casing removal mechanism comprising the casing removal mechanism as claimed in any one of claims 1 to 8, and an electric wrench; The power output end of the electric wrench is connected to the top of the main shaft (10) in the casing removal mechanism.

10. The casing removal device according to claim 9, characterized in that: Also includes: Hair dryer and / or air gun; The blower and / or air gun is used to blow out the chips generated by the drill bit (14) during the cutting of the nylon sleeve (3) from the stainless steel sleeve (2).

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