Telescopic boom clearance adjusting mechanism convenient to disassemble and assemble

Abstract

The utility model belongs to the technical field of underground mine operation equipment, and particularly relates to a telescopic boom clearance adjusting mechanism convenient to disassemble and assemble, which comprises an outer boom and an inner boom, the outer boom is of a hollow structure, the inner boom is slidably mounted in the outer boom, a plurality of wear-resistant sliding blocks are arranged in a clearance between the inner boom and the outer boom, and the wear-resistant sliding blocks are arranged on the outer boom. A base hole is formed in the outer arm frame, an installation base is fixedly installed in the base hole, the abrasion-resistant sliding block is flat, an installation protrusion is arranged on the plane of one side of the abrasion-resistant sliding block, the position of the installation protrusion corresponds to the base hole, a counter bore is formed in the center of the installation protrusion, and a disassembly and assembly hole is formed in the position, corresponding to the counter bore, of the outer surface of the inner arm. The wear-resistant sliding block is convenient to replace, only a small adjusting nut mounting hole needs to be formed in the outer arm frame, the structural strength of the outer arm frame is guaranteed, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining operation equipment, and in particular relates to a telescopic boom gap adjustment mechanism which is convenient for assembly and disassembly. Background Art

[0002] The telescopic arm is a type of robotic arm that is widely used at present. It consists of a fixed arm set on the outside and a movable arm installed inside it. It can change the working radius and working height of the equipment within a certain range. It is widely used in industrial production, disaster relief, medical care, mining and other fields.

[0003] In order to ensure that the telescopic arm can work normally, a certain gap is left between the fixed arm and the movable arm. Several wear-resistant sliders are usually arranged in the gap to reduce the friction between the two during relative movement. After the telescopic arm has been used for a period of time, the wear-resistant sliders will wear out. Especially for mining equipment, the working environment is harsh and there is a lot of dust in the air, and the wear of the wear-resistant sliders is more serious. This leads to an increase in the gap between the fixed arm and the movable arm, and the telescopic arm shakes and makes abnormal noises, which affects the working effect and creates a safety hazard. Therefore, the wear-resistant sliders need to be replaced regularly.

[0004] Chinese utility model patent application number 201320825276.4 discloses an adjustable slider device for a telescopic arm. A seat hole is opened on the fixed arm, a wear-resistant slider is placed in the seat hole, and then an adjustment device is installed on the wear-resistant block to press the wear-resistant slider against the movable arm. When the wear-resistant block is slightly worn, the wear-resistant slider can be pressed down by the adjustment device to eliminate the gap. When the wear-resistant slider is excessively worn, it needs to be replaced.

[0005] In order to facilitate the removal and installation of the wear-resistant slider, the seat hole opened on the fixed arm needs to be adapted to the size of the wear-resistant slider. For large-scale operating equipment, a larger contact area or a larger number of wear-resistant sliders are required. In this case, larger or more seat holes need to be opened on the fixed arm, which will lead to a decrease in the strength of the fixed arm, reduce the safety factor, and shorten the service life. Utility Model Content

[0006] The main technical problem to be solved by the utility model is to provide a telescopic arm gap adjustment mechanism that is easy to disassemble and assemble. By arranging mounting holes on the wear-resistant slider and the inner arm, the two can be installed as a whole, which facilitates the replacement of the wear-resistant slider. Only smaller adjustment nut mounting holes need to be opened on the outer arm to ensure the structural strength of the outer arm and improve its service life.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A telescopic arm gap adjustment mechanism that is easy to disassemble and assemble comprises an outer arm and an inner arm. The outer arm is a hollow structure, the inner arm can be slidably installed in the outer arm, a plurality of wear-resistant sliders are provided in the gap between the inner arm and the outer arm, a seat hole is provided on the outer arm, a mounting seat is fixedly installed in the seat hole, the wear-resistant slider is flat, a mounting protrusion is provided on one side plane, the position of the mounting protrusion corresponds to the seat hole, a countersunk hole is provided in the center of the mounting protrusion, and a disassembly hole is provided on the outer surface of the inner arm corresponding to the position of the countersunk hole.

[0009] The following is a further optimization of the above technical solution by the present invention:

[0010] The countersunk hole is a through hole, the diameter of the end close to the outer arm is larger, and the diameter of the end close to the inner arm is smaller.

[0011] Further optimization: the mounting seat is annular, the outer dimensions of the mounting seat are adapted to the seat hole, and the inner hole of the mounting seat is provided with a thread.

[0012] Further optimization: an adjusting nut is connected to the inner thread of the mounting seat, and a mounting groove is provided at one end of the adjusting nut close to the wear-resistant slider. The shape of the mounting groove is adapted to the shape of the mounting protrusion on the wear-resistant slider, and an adjusting groove is provided on the other side of the adjusting nut opposite to the mounting groove.

[0013] Further optimization: a spacer is fixedly arranged between the adjustment groove and the installation groove, a lubrication threaded hole is opened at the center of the spacer, the lubrication threaded hole is connected to the countersunk hole, and a lubrication oil nozzle is installed in the lubrication threaded hole.

[0014] Further optimization: the total height of the wear-resistant slider is not greater than the gap between the inner arm and the outer arm, and a groove is provided on the side of the wear-resistant slider opposite to the mounting protrusion, and the groove is connected to the countersunk hole.

[0015] Further optimization: A locking threaded hole is opened on the circumferential surface of one end of the mounting seat located on the outer side of the outer arm, and a locking bolt is installed in the inner thread of the locking threaded hole.

[0016] Further optimization: a plurality of locking grooves are provided on the end of the adjusting nut away from the wear-resistant slider, and the plurality of locking grooves are evenly spaced along the circumference of the adjusting groove.

[0017] Further optimization: the disassembly hole is a blind hole, an internal thread is provided in the disassembly hole, and a disassembly screw is installed in the internal thread of the disassembly hole.

[0018] Further optimization: a protrusion is provided at one end of the disassembly screw, and the diameters of the lubrication threaded hole and the large end of the countersunk hole are both larger than the outer dimensions of the protruding part of the disassembly screw.

[0019] The utility model adopts the above technical solution, which has the following beneficial effects:

[0020] The gap adjustment mechanism of the utility model is installed as a whole by providing mounting holes on the wear-resistant slider and the inner arm frame, so that the wear-resistant slider can be extended with the inner arm frame, which is convenient for disassembly and assembly, especially the wear-resistant sliders on the side and bottom of the inner arm frame, which greatly reduces the labor intensity of workers and improves the convenience of maintenance.

[0021] The clearance adjustment mechanism of the utility model is provided with a lubricating threaded hole on the adjusting nut for installing a lubricating oil nozzle. The injected lubricating oil can enter between the wear-resistant slider and the inner arm through the lubricating oil channel to reduce friction resistance. When the wear-resistant slider needs to be disassembled, the disassembly screw can be installed through the lubricating threaded hole first. At this time, the adjusting nut is pressed against the wear-resistant slider to prevent the wear-resistant slider from slipping and shifting, thereby facilitating operation.

[0022] The gap adjustment mechanism of the present invention does not require disassembly and assembly of the wear-resistant slider through the opening on the outer arm frame. Therefore, when the telescopic arm needs to be equipped with a larger-sized wear-resistant slider, there is no need to enlarge the mounting hole on the outer arm frame, thereby ensuring the structural strength of the outer arm frame, ensuring safety, and improving service life while reducing maintenance costs.

[0023] The gap adjustment mechanism of the utility model has a simple structure. Compared with the products of the prior art, it is only necessary to add threaded holes on the inner arm frame to replace the large-sized wear-resistant slider, which is convenient and fast to realize product upgrade and is conducive to improving the quality of the overall product.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0026] Figure 2 A partial cross-sectional view of the overall structure of an embodiment of the utility model;

[0027] Figure 3 This is a partial three-dimensional schematic diagram of the outer arm of this example;

[0028] Figure 4 This is a partial cross-sectional view of the outer arm of this example.

[0029] Figure 5 A partial cross-sectional view of the wear-resistant slider of this embodiment

[0030] Figure 6 This is a bottom view of the wear-resistant slider of this embodiment;

[0031] Figure 7 This is a cross-sectional view of the adjusting nut of this embodiment;

[0032] Figure 8 This is a partial cross-sectional view of the embodiment when the wear-resistant slider is disassembled;

[0033] Figure 9 This is a partial three-dimensional schematic diagram of the wear-resistant sliding block when disassembling the embodiment.

[0034] In the figure: 1. Inner arm; 2. Outer arm; 3. Wear-resistant slider; 301. Mounting protrusion; 302. Countersunk hole; 303. Groove; 4. Seat hole; 5. Mounting seat; 6. Adjusting nut; 601. Mounting groove; 602. Adjusting groove; 603. Spacer; 604. Lubrication threaded hole; 605. Locking groove; 7. Locking threaded hole; 8. Locking bolt; 9. Lubrication nozzle; 10. Disassembly hole; 11. Disassembly screw. DETAILED DESCRIPTION

[0035] like Figure 1-2 As shown, a telescopic arm gap adjustment mechanism that is easy to disassemble and assemble includes an outer arm 2 and an inner arm 1. The outer arm 2 is a hollow structure. The inner arm 1 can be slidably installed in the outer arm 2. The inner arm 1 can be slidably and telescopically moved in the outer arm 2 by an external driving device. A plurality of wear-resistant sliders 3 are provided in the gap between the inner arm 1 and the outer arm 2. A seat hole 4 is opened on the outer arm 2. A mounting seat 5 is fixedly installed in the seat hole 4, and an adjusting nut 6 is provided in the mounting seat 5.

[0036] like Figure 3-4 As shown, the mounting seat 5 is annular, and the outer dimensions of the mounting seat 5 are adapted to the seat hole 4. The inner hole of the mounting seat 5 is provided with a thread for providing a mounting interface. The lower end of the mounting seat 5 is flush with the inner surface of the outer arm 2, and the upper end protrudes from the outer surface of the outer arm 2. A locking threaded hole 7 is provided on the circumferential surface of one end of the mounting seat 5 located on the outer side of the outer arm 2, and a locking bolt 8 is installed in the inner thread of the locking threaded hole 7.

[0037] like Figure 5-6 As shown, the wear-resistant slider 3 is flat, with one side plane being provided with one or more mounting protrusions 301. The position of the seat hole 4 on the outer arm 2 corresponds to the position of the mounting protrusion 301 on the wear-resistant slider 3. During installation, the side of the wear-resistant slider 3 with the mounting protrusion 301 faces the outer arm 2. A countersunk hole 302 is provided in the center of the mounting protrusion 301. The countersunk hole 302 is a through hole, with a larger diameter at the end close to the outer arm 2 and a smaller diameter at the end close to the inner arm 1. A groove 303 is provided on the side surface of the wear-resistant slider 3 opposite to the mounting protrusion 301. The groove 303 is connected to the countersunk hole 302 to form a lubricating oil channel.

[0038] The outer dimensions of the adjusting nut 6 are adapted to the inner hole dimensions of the mounting base 5. An external thread is provided on the outer wall of the adjusting nut 6. The adjusting nut 6 is installed in the inner hole of the mounting base 5 through the thread. Figure 7It can be seen that an installation groove 601 is opened at one end of the adjusting nut 6 close to the wear-resistant slider 3. The shape of the installation groove 601 is adapted to the shape of the installation protrusion 301 on the wear-resistant slider 3. After installation, the height of the adjusting nut 6 is adjusted so that the installation protrusion 301 is embedded in the installation groove 601.

[0039] An adjusting groove 602 is provided on the other side of the adjusting nut 6 opposite to the mounting groove 601, and a spacer plate 603 is fixedly arranged between the adjusting groove 602 and the mounting groove 601 for separating the adjusting groove 602 and the mounting groove 601. A lubrication threaded hole 604 is provided in the center of the spacer plate 603, and the lubrication threaded hole 604 is connected to the countersunk hole 302 on the mounting protrusion 301. A lubrication oil nozzle 9 is installed in the lubrication threaded hole 604. When in use, lubricating oil is injected into the lubrication oil nozzle 9, and the lubricating oil enters the groove 303 at the bottom of the wear-resistant slider 3 through the countersunk hole 302, and then reaches the contact surface between the wear-resistant slider 3 and the inner arm 1, further reducing the friction of the relative movement between the two.

[0040] The adjusting groove 602 is a regular hexagon, and its size is adapted to the matching hexagonal wrench. When in use, the hexagonal wrench is inserted into the adjusting groove 602. The upper and lower positions of the adjusting nut 6 can be adjusted by rotating the wrench to tighten or loosen the wear-resistant slider 3. A plurality of locking grooves 605 are provided on the end of the adjusting nut 6 away from the wear-resistant slider 3. The locking groove 605 is U-shaped, and its width is slightly larger than the diameter of the locking threaded hole 7 on the mounting seat 5. A plurality of locking grooves 605 are evenly spaced along the circumference of the adjusting groove 602. After the installation is completed, the locking nut is fine-tuned so that a locking groove 605 is aligned with the locking threaded hole 7 on the mounting seat 5. The locking bolt 8 is rotated so that the end of the locking bolt 8 is inserted into the locking groove 605 to complete the locking, thereby preventing the locking nut from loosening due to bumps during the operation of the telescopic arm.

[0041] like Figure 8-9 As shown, a disassembly hole 10 is provided on the outer surface of the inner arm 1. When the inner arm 1 is retracted to the extreme position, the disassembly hole 10 corresponds to the position of the countersunk hole 302. The disassembly hole 10 is a blind hole to prevent lubricating oil from entering the interior of the inner arm 1 through the disassembly hole 10. An internal thread is provided in the disassembly hole 10. A disassembly screw 11 is provided in the disassembly hole 10. One end of the disassembly screw 11 is provided with an external thread, and the thread specification is adapted to the thread specification of the disassembly hole 10, and is used for threaded connection with the disassembly hole 10. A protrusion is provided at the other end of the disassembly screw 11.

[0042] In this embodiment, a groove is provided on the protruding top of the disassembly screw 11 for cooperating with a disassembly tool to realize the disassembly and assembly of the disassembly screw 11 .

[0043] In order to ensure that the disassembly screw 11 can be installed into the countersunk hole 302 through the lubricating threaded hole 604 and fix the wear-resistant slider 3 to the inner arm 1, it should be ensured that the diameters of the lubricating threaded hole 604 and the large end of the countersunk hole 302 are both larger than the external dimensions of the protruding part of the disassembly screw 11. After installation, the disassembly screw 11 is pressed against the large end of the countersunk hole 302 through the protrusion, fixing the wear-resistant slider 3 and the inner arm 1 as a whole.

[0044] When the wear-resistant slider 3 reaches the wear limit and needs to be replaced, follow the steps below:

[0045] S1: The inner arm 1 is retracted to the limit position, then the inner arm 1 on the disassembly hole 10 and the wear-resistant slider 3 on the countersunk hole 302 position corresponding to the remove the lubricating nozzle 9, self-lubricating threaded hole 604 is installed at the disassembly screw 11;

[0046] S2: Remove the locking bolt 8 and the adjusting nut 6, start the external driving device, and extend the inner arm 1 outward. The wear-resistant slider 3 moves with the inner arm 1 and separates from the outer arm 2.

[0047] S3: Remove the disassembly screws 11 and remove the wear-resistant slider 3.

[0048] When installing a new wear-resistant slider 3, follow the steps below:

[0049] L1: Use the disassembly screws 11 to fix the new wear-resistant slider 3 to the inner arm 1;

[0050] L2: The wear-resistant slider 3 retracts to the limit position along with the inner arm 1. At this time, the mounting protrusion 301 on the wear-resistant slider 3 corresponds to the seat hole 4 on the outer arm 2. The adjusting nut 6 is installed into the seat hole 4 so that the mounting groove 601 on the adjusting nut 6 cooperates with the mounting protrusion 301 on the wear-resistant slider 3. The upper and lower positions of the adjusting nut 6 are adjusted to press the wear-resistant slider 3 against the outer surface of the inner arm 1. The locking bolt 8 is installed to lock the adjusting nut 6.

[0051] L3: Remove the disassembly screw 11, install the lubricating oil nozzle 9 at the lubricating threaded hole 604, and inject lubricating oil.

[0052] The total height of the wear-resistant slider 3 is not greater than the gap between the inner arm 1 and the outer arm 2, so as to ensure that the wear-resistant slider 3 can slide into the outer arm 2 along with the inner arm 1 during installation without interference or jamming.

[0053] Depending on the size and shape of the wear-resistant slider 3, one or more mounting protrusions 301 can be set on each wear-resistant slider 3, and only a corresponding number of small holes need to be opened on the outer arm 2 to avoid the strength of the outer arm 2 being reduced due to the opening being too large.

[0054] For ordinary technicians in this field, based on the teachings of this utility model, without departing from the principles and spirit of this utility model, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of this utility model.

Claims

1. A telescopic arm gap adjustment mechanism that is easy to disassemble and assemble, comprising an outer arm (2) and an inner arm (1), wherein the outer arm (2) is a hollow structure, the inner arm (1) is slidably mounted in the outer arm (2), a plurality of wear-resistant sliders (3) are provided in the gap between the inner arm (1) and the outer arm (2), a seat hole (4) is provided on the outer arm (2), and a mounting seat (5) is fixedly mounted in the seat hole (4), characterized in that: The wear-resistant slider (3) is flat, and a mounting protrusion (301) is provided on one side of the plane. The position of the mounting protrusion (301) corresponds to the seat hole (4). A countersunk hole (302) is provided at the center of the mounting protrusion (301). A disassembly hole (10) is provided on the outer surface of the inner arm (1) at a position corresponding to the countersunk hole (302).

2. The telescopic arm gap adjustment mechanism that is easy to assemble and disassemble according to claim 1, characterized in that: The countersunk hole (302) is a through hole, with a larger diameter at one end close to the outer arm (2) and a smaller diameter at one end close to the inner arm (1).

3. The telescopic arm gap adjustment mechanism that is easy to assemble and disassemble according to claim 2, characterized in that: The mounting seat (5) is annular, the outer dimensions of the mounting seat (5) are adapted to the seat hole (4), and the inner hole of the mounting seat (5) is provided with a thread.

4. The telescopic arm gap adjustment mechanism that is easy to assemble and disassemble according to claim 3, characterized in that: The mounting seat (5) is internally threadedly connected to an adjusting nut (6), and an end of the adjusting nut (6) close to the wear-resistant slider (3) is provided with a mounting groove (601), the shape of the mounting groove (601) being adapted to the shape of the mounting protrusion (301) on the wear-resistant slider (3), and an adjusting groove (602) is provided on the other side of the adjusting nut (6) opposite to the mounting groove (601).

5. The telescopic arm gap adjustment mechanism that is easy to assemble and disassemble according to claim 4, characterized in that: A spacer plate (603) is fixedly provided between the adjustment groove (602) and the installation groove (601). A lubrication threaded hole (604) is provided at the center of the spacer plate (603). The lubrication threaded hole (604) is connected to the counterbore (302). A lubrication oil nozzle (9) is installed in the lubrication threaded hole (604).

6. The telescopic arm gap adjustment mechanism that is easy to assemble and disassemble according to claim 5, characterized in that: The total height of the wear-resistant slider (3) is no greater than the gap between the inner arm (1) and the outer arm (2). A groove (303) is provided on a side surface of the wear-resistant slider (3) opposite to the mounting protrusion (301), and the groove (303) is connected to the countersunk hole (302).

7. The telescopic arm gap adjustment mechanism that is easy to assemble and disassemble according to claim 6, characterized in that: A locking threaded hole (7) is provided on the circumferential surface of one end of the mounting seat (5) located outside the outer arm (2), and a locking bolt (8) is installed in the inner thread of the locking threaded hole (7).

8. The telescopic arm gap adjustment mechanism that is easy to assemble and disassemble according to claim 7, characterized in that: A plurality of locking grooves (605) are provided on one end of the adjusting nut (6) away from the wear-resistant slider (3), and the plurality of locking grooves (605) are evenly spaced along the circumference of the adjusting groove (602).

9. The telescopic arm gap adjustment mechanism that is easy to assemble and disassemble according to claim 8, characterized in that: The disassembly hole (10) is a blind hole, an internal thread is provided in the disassembly hole (10), and a disassembly screw (11) is installed in the internal thread of the disassembly hole (10).

10. The telescopic arm gap adjustment mechanism that is easy to assemble and disassemble according to claim 9, characterized in that: A protrusion is provided at one end of the disassembly screw (11), and the diameters of the large ends of the lubricating threaded hole (604) and the countersunk hole (302) are both larger than the outer dimensions of the protrusion of the disassembly screw (11).

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