CN114906756B - Telescopic arm sliding block assembly with clearance eliminating function and clearance eliminating method thereof - Google Patents
Telescopic arm sliding block assembly with clearance eliminating function and clearance eliminating method thereof Download PDFInfo
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- CN114906756B CN114906756B CN202210449843.4A CN202210449843A CN114906756B CN 114906756 B CN114906756 B CN 114906756B CN 202210449843 A CN202210449843 A CN 202210449843A CN 114906756 B CN114906756 B CN 114906756B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 230000008030 elimination Effects 0.000 claims abstract description 7
- 238000003379 elimination reaction Methods 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 230000001174 ascending effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/707—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic guiding devices for telescopic jibs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manipulator (AREA)
- Jib Cranes (AREA)
Abstract
The invention relates to the technical field of telescopic arms, and particularly discloses a telescopic arm sliding block assembly with a clearance eliminating function and a clearance eliminating method thereof, wherein the telescopic arm sliding block assembly comprises a sliding block mechanism and a telescopic arm mechanism with the sliding block mechanism; the sliding block mechanism comprises an upper sliding block and a lower sliding block which are fixed on corresponding section arms through bases, a reset spring is arranged in the fixed sliding block, one end of the reset spring is contacted with an inner hole of the movable sliding block, and the other end of the reset spring is connected with the bases through a spring support; the ejector rod is arranged on the base, one end of the ejector rod is used for being in contact with the movable sliding block, one end of the movable sliding block, which is in contact with the inner arm, is arranged into a planar structure, and the contact surfaces of the movable sliding block, the base and the fixed sliding block are arranged into an inclined surface structure. The telescopic arm sliding block assembly can automatically trigger the clearance elimination function through the mechanical mechanism of the telescopic arm sliding block assembly when the telescopic arm reaches the stroke end without manual intervention and sensor feedback, has higher reliability, and has certain universality for various telescopic arms with the clearance elimination requirement.
Description
Technical Field
The invention relates to the technical field of telescopic arms, in particular to a telescopic arm sliding block assembly with a clearance eliminating function and a clearance eliminating method thereof.
Background
The telescopic boom type lifting device is widely applied to the fields of mobile communication, military equipment, engineering machinery and the like. In order to ensure that the lifting tower is smooth in extension or shortening process and is not blocked, gaps within 5mm are usually reserved between each sliding block and two adjacent sections of tower arms in the prior art, the sliding blocks are made of nylon materials, and the two adjacent sections of arms are respectively called an inner arm and an outer arm. Wherein, the inner arm is embedded in the outer arm, the tail of the inner arm is provided with a lower slide block, and the head of the outer arm is provided with an upper slide block; the inner arm is in a retracted state, and a certain gap c is formed between the upper sliding block and the outer arm under the action of the self weight of the inner arm; in the extension stroke of the inner wall, when the extension stroke is longer, a deflection angle theta is generated at the overlap position of the arm head (as shown in fig. 1); when the telescopic boom is in a vertical working state, the inner wall shakes in the outer wall due to the change of the load direction, the superposition effect of the multi-section boom can increase the integral deformation of the telescopic boom, and the working precision and the bearing capacity of the whole lifting equipment are reduced.
The prior published patent application number is: 201120361219.6, patent name: the invention patent of a slide block device for a telescopic arm of a crane, which discloses three slide blocks with adjustable gaps, wherein the slide blocks adjust the tightness by adding addition and subtraction gaskets and manual adjusting screws or by controlling an executing mechanism; wherein, two adjusting modes of adding the addition and subtraction gasket and the manual adjusting screw are firstly stopped, and then the gap between the sliding block and the section arm is adjusted; in addition, the mode of maintaining the gap eliminating state by the driving mechanism can realize gap detection and automatic control, but has complex functions and complex operation, and the reliability is low because the elements such as a sensor are needed to feed back the adjustment process and the result when the gap eliminating device is used.
Disclosure of Invention
The invention aims to provide a telescopic arm sliding block assembly with a clearance eliminating function and a clearance eliminating method thereof, so as to solve the problems in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a telescopic arm sliding block assembly with a clearance eliminating function and a clearance eliminating method thereof are provided, wherein the telescopic arm sliding block assembly comprises a sliding block mechanism and a telescopic arm mechanism with the sliding block mechanism; the telescopic arm mechanism comprises a plurality of sections of mutually nested joint arms, and four sets of sliding block mechanisms are respectively arranged outside the tail part and inside the head part of each section of telescopic arm; the sliding block mechanism comprises an upper sliding block and a lower sliding block which are respectively arranged at the upper end and the lower end of the joint arm of each section, and the upper sliding block and the lower sliding block are fixed on the corresponding joint arm through a base; the two adjacent sections of the section arms comprise inner arms and outer arms which are nested with each other, an upper sliding block arranged at one end of the outer arm close to the inner arm is arranged in the outer arm, a lower sliding block arranged at one end of the inner arm close to the outer arm is arranged outside the inner arm, a moving pair is formed between the upper sliding block and the inner arm in the extending process of the inner arm, and a moving gap which is convenient for lifting the inner arm is arranged between the upper sliding block and the inner arm;
The upper sliding block and the lower sliding block respectively comprise a reset spring, a spring support, a push rod, a fixed sliding block and a movable sliding block, wherein the reset spring is arranged in the fixed sliding block, one end of the reset spring is in contact with an inner hole of the movable sliding block, and the other end of the reset spring is connected with the base through the spring support; the ejector rod is arranged on the base, and one end of the ejector rod is used for being contacted with the movable sliding block; the movable sliding block is contracted in the fixed sliding block under the action force of the reset spring, one end of the movable sliding block, which is in contact with the inner arm, is arranged to be of a plane structure, and the contact surfaces of the movable sliding block, the base and the fixed sliding block are arranged to be of an inclined surface structure.
Preferably, the fixed slider is processed from a material with good friction properties, including but not limited to tin bronze.
Preferably, the outer arm is provided with a mounting cavity corresponding to the inner arm, the inner arm is embedded in the mounting cavity of the outer arm, the arm tail of the inner arm is provided with a lower sliding block, the arm head of the outer arm is provided with an upper sliding block, the upper sliding block is positioned on the inner wall of the top end of the mounting cavity, and the lower sliding block is arranged in the mounting cavity.
Preferably, the slope of the inclined plane on the movable slide block is smaller than the self-locking angle between the movable slide block and the base.
Preferably, the axis of the return spring is parallel to the inclined plane of the movable slider.
Preferably, the upper sliding block and the lower sliding block have the same structure except for different installation positions.
Preferably, a ball is rotatably arranged on the end face of the ejector rod, which is close to one end face of the movable sliding block, and the ball is in contact with the movable sliding block.
Preferably, a nut is sleeved at one end of the ejector rod, which is close to the movable sliding block.
Preferably, a limiting block used for being matched with the ejector rod is arranged at the position of the inner arm corresponding to the ejector rod, and the limiting block is matched with one end of the ejector rod away from the movable sliding block.
The scheme also provides a gap eliminating method of the telescopic boom slider assembly with the gap eliminating function, which is characterized in that: the method specifically comprises the following steps:
S1: in the extension stroke, the movable slide block is contracted in the fixed slide block under the action force of the return spring, and a gap of less than 5mm is reserved between the fixed slide block and the inner arm, so that the inner arm is ensured to ascend or descend smoothly;
s2: when the inner arm extends to the stroke end point, a limiting block on the inner arm is contacted with a push rod on a sliding block at the upper end of the outer arm, the limiting block on the outer arm is contacted with the push rod on the sliding block at the lower end of the inner arm, the push rod pushes the movable sliding block to move along an inclined plane, and finally the movable sliding block at the upper end of the outer arm presses the inner arm, and the movable sliding block at the lower end of the inner arm presses the outer arm;
because the slope of the inclined plane between the movable slide block and the base is smaller than the self-locking angle between the movable slide block and the base, the movable slide block is retracted under the pressure action between the inner arm, the outer arm and the movable slide block, so that the reliability of clearance elimination is ensured;
s3: in the recovery stroke, the inner arm has a downward movement trend under the drive of external force, the acting force between the limiting blocks on the inner arm and the outer arm and the ejector rods on the corresponding sliding blocks disappears, and the movable sliding blocks are retracted into the fixed sliding blocks under the action of the reset springs, so that the clearance between the inner arm and the outer arm is recovered, and the smoothness of recovery movement is ensured.
Compared with the prior art, the invention has the beneficial effects that:
According to the telescopic arm sliding block assembly with the clearance eliminating function and the clearance eliminating method thereof, provided by the invention, the sliding block mechanism arranged on the telescopic arm can automatically trigger the clearance eliminating function through the mechanical mechanism of the telescopic arm when the telescopic arm reaches the stroke end without manual intervention and sensor feedback during use, the reliability is higher, the self-resetting component of the telescopic arm sliding block assembly is compact in structure and convenient to use, and the telescopic arm sliding block assembly has certain universality for various telescopic arms with the clearance eliminating requirements.
Drawings
FIG. 1 is a schematic diagram of a connecting structure of a slider and a knuckle arm in a telescopic arm in the prior art;
FIG. 2 is a front view of the telescopic arm slider assembly of the present invention in an end-of-travel condition;
FIG. 3 is a front view of the telescoping arm slide assembly of the present invention in a retracted state;
FIG. 4 is a cross-sectional view of the telescoping arm slide assembly of the present invention in an end-of-travel condition;
FIG. 5 is a cross-sectional view of the telescoping arm slide assembly of the present invention in a retracted state;
FIG. 6 is an enlarged view of the upper and lower sliders of the present invention;
FIG. 7 is a transverse cross-sectional view of the present invention;
FIG. 8 is a schematic diagram of a connection structure of a fixed slider and a movable slider according to the present invention;
fig. 9 is a longitudinal cross-sectional view of the present invention.
In the figure: 1. an outer arm; 2. an upper slider; 3. a lower slide block; 4. an inner arm; 5. a base; 6. a fixed sliding block; 7. a spring support; 8. a return spring; 9. a movable slide block; 10. a ball; 11. a nut; 12. a push rod; 13. and a limiting block.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 2-9, the present invention provides a technical solution: four sets of sliding block mechanisms are respectively arranged in the telescopic arm sliding block assembly with the anti-backlash function, the part and the arm head; the sliding block mechanism comprises an upper sliding block 2 and a lower sliding block 3 which are respectively arranged at the upper end and the lower end of a section arm of each section, and the upper sliding block 2 and the lower sliding block 3 are fixed on the corresponding section arm through a base 5; the two adjacent sections of the section arms comprise inner arms 4 and outer arms 1 which are nested with each other, an upper sliding block 2 arranged at one end of the outer arms 1 close to the inner arms 4 is arranged in the outer arms 1, a lower sliding block 3 arranged at one end of the inner arms 4 close to the outer arms 1 is arranged outside the inner arms 4, a moving pair is formed between the upper sliding block 2 and the inner arms 4 in the extending process of the inner arms 4, and a moving gap which is convenient for lifting the inner arms 4 is arranged between the upper sliding block 2 and the inner arms 4;
The upper sliding block 2 and the lower sliding block 3 respectively comprise a return spring 8, a spring support 7, a push rod 12, a fixed sliding block 6 and a movable sliding block 9, wherein the return spring 8 is arranged in the fixed sliding block 6, one end of the return spring 8 is in contact with an inner hole of the movable sliding block 9, and the other end of the return spring 8 is connected with the base 5 through the spring support 7; the ejector rod 12 is arranged on the base 5, and one end of the ejector rod is used for contacting with the movable sliding block 9; the movable slide block 9 is contracted in the fixed slide block 6 under the action force of the return spring 8, one end of the movable slide block 9, which is in contact with the inner arm 4, is arranged to be of a planar structure, and the contact surfaces of the movable slide block 9, the base 5 and the fixed slide block 6 are arranged to be of an inclined structure.
As a preferred embodiment, the fixed slider 6 is made of a material having good friction performance, including but not limited to tin bronze.
As a preferred embodiment, the position of the outer arm 1 corresponding to the inner arm 4 is provided with a mounting cavity, the inner arm 4 is embedded in the mounting cavity of the outer arm 1, the arm tail of the inner arm 4 is provided with a lower slider 3, the arm head of the outer arm 1 is provided with an upper slider 2, the upper slider 2 is positioned on the inner wall of the top end of the mounting cavity, and the lower slider 3 is arranged in the mounting cavity.
As a preferred embodiment, the slope of the inclined surface on the movable slider 9 is smaller than the self-locking angle between the movable slider 9 and the base 5.
As a preferred embodiment, the axis of the return spring 8 is parallel to the inclined surface of the movable slider 9.
As a preferred embodiment, the upper slider 2 and the lower slider 3 may have the same design except for the installation positions.
As a preferred embodiment, the ejector rod 12 is rotatably mounted on an end face of the ejector rod, which is close to the movable slider 9, and the ball 10 is in contact with the movable slider 9.
As a preferred embodiment, a nut 11 is sleeved on one end of the ejector rod 12 close to the movable sliding block 9.
As a preferred embodiment, a limiting block 13 for being matched with the ejector rod 12 is arranged at a position of the inner arm 4 corresponding to the ejector rod 12, and the limiting block 13 is matched with one end of the ejector rod 12 away from the movable sliding block 9.
The scheme also provides a gap eliminating method of the telescopic boom slider assembly with the gap eliminating function, which is characterized in that: the telescopic arm mechanism of the telescopic arm sliding block assembly comprises a plurality of sections of mutually nested joint arms, two adjacent joint arms are named as an inner arm 4 and an outer arm 1, and a sliding block mechanism is arranged between the inner arm 4 and the outer arm 1. In the extension stroke of the telescopic arm mechanism, the movable slide block 9 is contracted in the fixed slide block 6 under the action of the return spring 8, and at this time, a gap of less than 5mm exists between the fixed slide block 6 and the inner arm 4, so that the inner arm 4 can smoothly perform lifting movement.
In the moving process of the telescopic arm mechanism, the clearance eliminating method of the telescopic arm sliding block assembly specifically comprises the following steps:
S1: in the extension stroke, the movable slide block 9 is contracted in the fixed slide block 6 under the acting force of the return spring 8, and a gap within 5mm is reserved between the fixed slide block 6 and the inner arm 4, so that the ascending or descending process of the inner arm 4 is ensured to be smooth;
S2: when the inner arm 4 extends to the stroke end, a limiting block 13 on the inner arm 4 is contacted with a push rod 12 on a slide block at the upper end of the outer arm 1, the limiting block 13 on the outer arm 1 is contacted with the push rod 12 on the slide block at the lower end of the inner arm 4, the push rod 12 pushes the movable slide block 9 to move along an inclined plane, and finally the movable slide block 9 at the upper end of the outer arm 1 presses the inner arm 4, and the movable slide block 9 at the lower end of the inner arm 4 presses the outer arm 1;
Because the slope of the inclined plane between the movable slide block 9 and the base 5 is smaller than the self-locking angle between the movable slide block 9 and the base 5, the movable slide block 9 is retracted under the pressure action between the inner arm 4, the outer arm 1 and the movable slide block 9, so that the reliability of clearance elimination is ensured;
S3: in the recovery stroke, the inner arm 4 has a downward movement trend under the drive of external force, the acting force between the limiting blocks 13 on the inner arm 4 and the outer arm 1 and the ejector rods 12 on the corresponding sliding blocks disappears, and the movable sliding block 9 is retracted into the fixed sliding block 6 under the action of the reset spring 8, so that the gap between the inner arm 4 and the outer arm 1 is recovered, and the smoothness of recovery movement is ensured.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a flexible arm slider assembly with clearance function disappears which characterized in that: the telescopic arm sliding block assembly comprises a sliding block mechanism and a telescopic arm mechanism with the sliding block mechanism; the telescopic arm mechanism comprises a plurality of sections of mutually nested section arms; the sliding block mechanism comprises an upper sliding block (2) and a lower sliding block (3) which are respectively arranged at the upper end and the lower end of a section arm of each section, and the upper sliding block (2) and the lower sliding block (3) are fixed on the corresponding section arm through a base (5); the two adjacent sections of the section arms comprise inner arms (4) and outer arms (1) which are nested with each other, an upper sliding block (2) arranged on one end, close to the inner arms (4), of the outer arms (1) is arranged in the outer arms (1), a lower sliding block (3) arranged on one end, close to the outer arms (1), of the inner arms (4) is arranged outside the inner arms (4), a moving pair is formed between the upper sliding block (2) and the inner arms (4) in the extending process of the inner arms (4), and a moving gap which is convenient for lifting the inner arms (4) is arranged between the upper sliding block (2) and the inner arms (4);
The upper sliding block (2) and the lower sliding block (3) comprise a return spring (8), a spring support (7), a push rod (12), a fixed sliding block (6) and a movable sliding block (9), wherein the return spring (8) is arranged in the fixed sliding block (6), one end of the return spring (8) is in contact with an inner hole of the movable sliding block (9), and the other end of the return spring is connected with the base (5) through the spring support (7); the ejector rod (12) is arranged on the base (5), and one end of the ejector rod is used for being contacted with the movable sliding block (9); the movable sliding block (9) is contracted in the fixed sliding block (6) under the action force of the return spring (8), one end of the movable sliding block (9) contacted with the inner arm (4) is of a planar structure, and the contact surfaces of the movable sliding block (9) with the base (5) and the fixed sliding block (6) are of an inclined structure;
the slope of the inclined plane on the movable sliding block (9) is smaller than the self-locking angle between the movable sliding block (9) and the base (5);
the axis of the return spring (8) is parallel to the inclined plane of the movable sliding block (9);
the inner arm (4) is provided with a limiting block (13) corresponding to the ejector rod (12), the limiting block (13) is matched with one end of the ejector rod (12) away from the movable sliding block (9).
2. The telescopic boom slider assembly with anti-backlash function according to claim 1, wherein: four sets of sliding block mechanisms are respectively arranged outside the arm tail and inside the arm head of each section of arm.
3. The telescopic boom slider assembly with anti-backlash function according to claim 1, wherein: the outer arm (1) is provided with an installation cavity corresponding to the inner arm (4), the inner arm (4) is embedded in the installation cavity of the outer arm (1), the lower slider (3) is installed at the arm tail of the inner arm (4), the upper slider (2) is installed at the arm head of the outer arm (1), the upper slider (2) is located on the inner wall of the top end of the installation cavity, and the lower slider (3) is arranged in the installation cavity.
4. The telescopic boom slider assembly with anti-backlash function according to claim 1, wherein: the ejector rod (12) is rotatably mounted on the end face of one end, close to the movable sliding block (9), of the ejector rod, and the ball (10) is in contact with the movable sliding block (9).
5. The telescopic boom slider assembly with anti-backlash function according to claim 1, wherein: one end of the ejector rod (12) close to the movable sliding block (9) is sleeved with a nut (11).
6. The clearance elimination method for the telescopic boom slider assembly with the clearance elimination function according to any one of claims 1 to 5, wherein the clearance elimination method is characterized by comprising the following steps of: the method specifically comprises the following steps:
S1: in the extension stroke, the movable slide block (9) is contracted in the fixed slide block (6) under the action force of the return spring (8), a gap of less than 5mm is reserved between the fixed slide block (6) and the inner arm (4), and the ascending or descending process of the inner arm (4) is ensured to be smooth;
S2: when the inner arm (4) stretches out to the end of the stroke, a limiting block (13) on the inner arm (4) is contacted with a push rod (12) on a slide block at the upper end of the outer arm (1), the limiting block (13) on the outer arm (1) is contacted with the push rod (12) on the slide block at the lower end of the inner arm (4), the push rod (12) pushes the movable slide block (9) to move along an inclined plane, and finally the movable slide block (9) at the upper end of the outer arm (1) presses the inner arm (4), and the movable slide block (9) at the lower end of the inner arm (4) presses the outer arm (1);
Because the slope of the inclined plane between the movable slide block (9) and the base (5) is smaller than the self-locking angle between the movable slide block and the base, the movable slide block (9) is retracted under the pressure action between the inner arm (4), the outer arm (1) and the movable slide block (9), so that the gap eliminating reliability is ensured;
S3: in the recovery stroke, the inner arm (4) has a downward movement trend under the drive of external force, the acting force between the limiting blocks (13) on the inner arm (4) and the outer arm (1) and the ejector rods (12) on the corresponding sliding blocks disappears, and the movable sliding blocks (9) are retracted into the fixed sliding blocks (6) under the action of the reset springs (8), so that the gaps between the inner arm (4) and the outer arm (1) are recovered, and the smoothness of recovery movement is ensured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210449843.4A CN114906756B (en) | 2022-04-24 | 2022-04-24 | Telescopic arm sliding block assembly with clearance eliminating function and clearance eliminating method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210449843.4A CN114906756B (en) | 2022-04-24 | 2022-04-24 | Telescopic arm sliding block assembly with clearance eliminating function and clearance eliminating method thereof |
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| CN114906756A CN114906756A (en) | 2022-08-16 |
| CN114906756B true CN114906756B (en) | 2024-04-23 |
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| CN115781095B (en) * | 2023-01-06 | 2023-05-26 | 西北电子装备技术研究所(中国电子科技集团公司第二研究所) | Double-spring seam welding head and parallel seam welding machine |
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| JPH0712385U (en) * | 1993-07-30 | 1995-02-28 | 住友建機株式会社 | Construction machinery boom |
| CN1514913A (en) * | 2001-04-20 | 2004-07-21 | IGUS��ҵ��עѹ������˾ | Linear guide |
| CN202098989U (en) * | 2011-06-16 | 2012-01-04 | 长沙中联重工科技发展股份有限公司 | Adjustable slide block device and engineering machine provided with same |
| CN202296911U (en) * | 2011-09-24 | 2012-07-04 | 三一汽车起重机械有限公司 | Slider device for telescopic arm of crane and crane |
| CN103112785A (en) * | 2013-02-18 | 2013-05-22 | 愚公机械股份有限公司 | Retractable arm slide block assembly and retractable arm |
| CN104057862A (en) * | 2013-03-21 | 2014-09-24 | 徐州徐工随车起重机有限公司 | Arm locking mechanism and automatic lateral loading and unloading transport vehicle |
| CN105712219A (en) * | 2016-05-06 | 2016-06-29 | 北汽福田汽车股份有限公司 | Crane and telescopic boom thereof |
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| CN114906756A (en) | 2022-08-16 |
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