Rigid crane jib

Abstract

The utility model provides a rigid crane telescopic arm relates to crane telescopic arm technical field, including sleeve, the inside slide coupling of sleeve has arm lever, the bottom of sleeve is installed with the bracing mechanism near the front, the left and right sides of sleeve are fixedly connected with limit component near the front, the bracing mechanism includes the rolling axle, the left and right sides of rolling axle are provided with the fixed base, the inside of fixed base is near the bottom and is equipped with the sliding slot, the inside slide coupling of sliding slot has the sliding block, can support the arm lever bottom in the telescopic through the fixed base cooperation rolling axle, through the back sliding limit plate, and the sliding block is pushed out to the outside, can take out the rolling axle from the inside of fixed base quickly, and then maintains replacement, compared with traditional ball or sliding slot type structure, has greatly improved the life, has effectively improved practicality.

Description

TECHNICAL FIELD

[0001] The utility model relates to a crane telescopic arm technical field especially relates to a rigid crane telescopic arm. BACKGROUND

[0002] The telescopic arm of traditional rigid crane mostly adopts the setting of inside and outside nesting of multistage arm section, the friction between the arm sections on the telescopic arm on the crane mostly adopts the form of cooperation of roller and sliding slot and sliding block to reduce the friction between the inside and outside arm sections, and the cooperation mode exists gap between the inside and outside section pipes, wherein the rolling mode of cooperation of ball can effectively reduce the friction;

[0003] But the hoisting load that can bear is low, the ball is easy to damage when the load is too large, and the ball is usually arranged inside the sleeve pipe, and once damaged, it cannot be quickly replaced, and the practicability is insufficient, the connecting mode of cooperation of sliding block and sliding slot can bear larger hoisting load, the telescopic falling force of the movable arm rod is larger, leading to larger friction of the telescopic arm rod, and the arm rod is easy to be deformed by friction and falling, thereby the service life of the telescopic arm is reduced, therefore, the utility model provides a rigid crane telescopic arm. CONTENT OF UTILITY MODEL

[0004] The utility model discloses a rigid crane telescopic arm that can bear larger hoisting load, the telescopic falling force of the movable arm rod is smaller, the friction of the telescopic arm rod is smaller, the arm rod is not easy to be deformed by friction and falling, and the service life of the telescopic arm is prolonged.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A rigid crane telescopic arm, including sleeve, the inside of sleeve is connected with arm rod and slides, the bottom of sleeve is installed with support mechanism near the front,

[0007] The left and right sides of sleeve are fixedly connected with limiting component near the front,

[0008] The support mechanism includes roller, the left and right sides of roller are symmetrically provided with fixed seat, the inside of fixed seat is close to the bottom and is provided with sliding slot, the inside of sliding slot is slidably connected with sliding block.

[0009] As the preferred scheme of the utility model, the limiting assembly includes a fixed block, the fixed block is welded with a sleeve, a square groove is opened through the front surface and the back surface of the fixed block, a limiting plate is slidably connected in the square groove, and a threaded rod is screw-connected to the outside of the fixed block and extends to the inside.

[0010] The technical effect of the above further scheme is that the limiting plate can be slid forward and backward, the limiting plate is moved to the outside of the fixed seat to limit the sliding block, the sliding block is prevented from falling off, and the use stability is improved.

[0011] As the preferred scheme of the utility model, the inside of the limiting plate near one end of the front surface is welded with a supporting block at the bottom of the fixed seat.

[0012] The technical effect of the above further scheme is that the inside of the sliding block is limited by the supporting block, the sliding block is prevented from being separated from the fixed seat, and the use stability is improved.

[0013] As the preferred scheme of the utility model, a threaded hole is opened through the outside and the inside of the limiting plate, and the threaded hole is matched with the threaded rod.

[0014] The technical effect of the above further scheme is that the threaded rod is rotated to pass through the threaded hole, the position of the limiting plate is fixed, the limiting plate is prevented from sliding during use, and the use stability is improved.

[0015] As the preferred scheme of the utility model, a rubber sleeve is sleeved at the contact position between the periphery of the rolling shaft and the arm rod.

[0016] The technical effect of the above further scheme is that the rubber sleeve can prevent the arm rod from directly contacting the rolling shaft, thereby reducing the wear of the two and improving the service life.

[0017] As the preferred scheme of the utility model, connecting pieces are welded at the inside of the fixed seat and extend to the left and right ends of the rolling shaft.

[0018] The technical effect of the above further scheme is that the rolling shaft is inserted into the inside of the fixed seat through the connecting pieces, the rolling shaft and the fixed seat are connected, and the arm rod is supported.

[0019] As the preferred scheme of the utility model, a first semicircular groove is opened at the inner top end of the sliding groove and located at the periphery of the connecting piece, and the first semicircular groove is matched with the connecting piece.

[0020] The technical effect of the above further scheme is that the first semicircular groove and the second semicircular groove facilitate the rotation of the connecting piece in the inside of the fixed seat, and the use stability is improved.

[0021] As the preferred scheme of the utility model, the top end of the sliding block and the periphery of the connecting piece are provided with a second semicircular groove.

[0022] The technical effect of the further scheme is that the connecting piece is limited by the sliding block and the second semicircular groove, preventing it from sliding downward from the inside of the sliding groove during use, and improving the use stability.

[0023] Compared with the prior art, the utility model has the beneficial effects that:

[0024] In the utility model, the bottom of the arm rod in extension is supported by the fixed seat and the roller shaft, the roller shaft is taken out from the inside of the fixed seat by sliding the limiting plate to the back and pushing the sliding block to the outside, and then the roller shaft is maintained and replaced, the service life is greatly improved, and the practicability is effectively improved compared with the traditional ball or sliding groove structure. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A schematic diagram of the overall structure of the rigid crane telescopic arm is provided in the utility model.

[0026] Figure 2 A front overall structure dissection diagram of the rigid crane telescopic arm is provided in the utility model.

[0027] Figure 3 A side structure dissection diagram of the supporting mechanism of the rigid crane telescopic arm is provided in the utility model.

[0028] Figure 4 A top overall structure dissection diagram of the rigid crane telescopic arm is provided in the utility model.

[0029] Legend: 1, sleeve; 101, limiting component; 1011, fixed block; 1012, square groove; 1013, limiting plate; 1014, threaded rod; 1015, supporting block; 1016, threaded port; 2, arm rod; 3, supporting mechanism; 301, roller shaft; 3011, rubber sleeve; 3012, connecting piece; 302, fixed seat; 303, sliding groove; 3031, first semicircular groove; 304, sliding block; 3041, second semicircular groove. DETAILED DESCRIPTION

[0030] Clearly, the embodiments described are only a part of the embodiments of the present application, and are not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0031] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related description, and several embodiments of the present application are given. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0032] It should be noted that when an element is referred to as being "fixedly attached" to another element, it can be directly on the other element or there can be an intervening element between them. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element between them. The terms "vertical", "horizontal", "left", "right", and similar terms used herein are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0034] Embodiment 1

[0035] As shown in Figures 1-4 The present application provides a technical scheme: a rigid crane telescopic arm, including sleeve 1, the inside of sleeve 1 is slidably connected with arm rod 2, the bottom of sleeve 1 is close to the front and is provided with supporting mechanism 3, the left and right sides of sleeve 1 are close to the front and are fixedly connected with limiting assembly 101, supporting mechanism 3 includes roller 301, the left and right sides of roller 301 are symmetrically provided with fixed seat 302, the inside of fixed seat 302 is close to the bottom and is provided with sliding groove 303, the inside of sliding groove 303 is slidably connected with sliding block 304.

[0036] Embodiment 2

[0037] As shown in Figures 1-4As shown, the limiting assembly 101 includes a fixed block 1011 welded with the sleeve 1, a square groove 1012 is opened through the front to the back of the fixed block 1011, a limiting plate 1013 is slidably connected inside the square groove 1012, a threaded rod 1014 is threadedly connected to the outside of the fixed block 1011 extending to the inside, through the sliding connection of the square groove 1012 and the limiting plate 1013, the limiting plate 1013 can be slid forward and backward, the limiting plate 1013 is moved to the outside of the fixed seat 302 to limit the sliding block 304, preventing it from falling off, improving the use stability, the inside of the end of the front of the limiting plate 1013 is welded with a supporting block 1015 at the bottom of the fixed seat 302, the inside of the sliding block 304 can be limited by the supporting block 1015, preventing it from being separated from the fixed seat 302, improving the use stability, a threaded hole 1016 is opened through the outside of the limiting plate 1013 to the inside, the threaded hole 1016 is matched with the threaded rod 1014, by rotating the threaded rod 1014, the limiting plate 1013 can be fixed in position through the threaded hole 1016, preventing it from sliding during use, improving the use stability, a rubber sleeve 3011 is sleeved at the contact between the periphery of the roller 301 and the arm rod 2, the rubber sleeve 3011 can prevent the arm rod 2 from directly contacting the roller 301, thereby reducing the wear of the two and improving the service life, the connecting piece 3012 is welded at the inside of the fixed seat 302 extending to the left and right ends of the roller 301, the roller 301 can be inserted into the inside of the fixed seat 302 through the connecting piece 3012, so that the two are connected, and then the arm rod 2 is supported, the first semicircular groove 3031 is opened at the inner top end of the sliding groove 303 and located at the periphery of the connecting piece 3012, the first semicircular groove 3031 is matched with the connecting piece 3012, the first semicircular groove 3031 and the second semicircular groove 3041 facilitate the rotation of the connecting piece 3012 inside the fixed seat 302, improving the use stability, the second semicircular groove 3041 is opened at the top end of the sliding block 304 and located at the periphery of the connecting piece 3012, the second semicircular groove 3041 is matched with the connecting piece 3012, the connecting piece 3012 can be limited by the sliding block 304 and the second semicircular groove 3041, preventing it from sliding downward from the inside of the sliding groove 303 during use, improving the use stability.

[0038] The utility model discloses a work flow: when the telescopic arm of a rigid crane is used to overhaul and replace and disassemble, first rotate threaded rod 1014, make it and threaded mouth 1016 separate contact, and slide limit plate 1013 to the back, thereby make limit plate 1013 and fixed post separate contact, after pushing slider 304 to the outside, push it from the inside of sliding slot 303, and make connecting piece 3012 separate contact, can take out the roller 301 from the inside of fixed seat 302 and replace or maintain, after the roller 301 of replacement or maintenance, connecting piece 3012 at both ends is pushed into the inside of sliding slot 303 from the bottom of fixed seat 302, and make connecting piece 3012 top and first half circular recess 3031 fit, and push slider 304 from the outside into the inside of sliding slot 303, make second half circular recess 3041 and connecting piece 3012 bottom fit, complete the preliminary installation of roller 301, finally push limit plate 1013 to the front, make it move to the periphery of fixed seat 302, and the outside of slider 304 is positioned and blocked, and meanwhile, the inner side of slider 304 is also positioned by supporting block 1015, finally reverse threaded rod 1014, make it penetrate threaded mouth 1016, and fix limit plate 1013, can complete the whole replacement maintenance process, compared with traditional ball or sliding slot 303 type structure, greatly improve the service life, effectively improve practicality.

[0039] Although the embodiments of the utility model 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 thereto without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A rigid crane telescopic boom, comprising a sleeve (1), characterized in that: The sleeve (1) is slidably connected to the inside of the arm (2), and a support mechanism (3) is installed at the bottom of the sleeve (1) near the front. Limiting components (101) are fixedly connected to the left and right sides of the sleeve (1) near the front. The support mechanism (3) includes a roller (301), and fixed seats (302) are symmetrically arranged on the left and right sides of the roller (301). A sliding groove (303) is provided inside the fixed seat (302) near the bottom. A slider (304) is slidably connected inside the sliding groove (303).

2. The rigid crane telescopic boom according to claim 1, characterized in that: The limiting component (101) includes a fixing block (1011), which is welded to the sleeve (1). A square groove (1012) is provided on the front and through the back of the fixing block (1011). A limiting plate (1013) is slidably connected inside the square groove (1012). A threaded rod (1014) is threadedly connected to the outer side of the fixing block (1011) to the inner side.

3. A rigid crane telescopic boom according to claim 2, characterized in that: The limiting plate (1013) is located on the inner side of one end of the front, and a support block (1015) is welded to the bottom of the fixing base (302).

4. A rigid crane telescopic boom according to claim 2, characterized in that: The outer side of the limiting plate (1013) is provided with a threaded opening (1016) that penetrates the inner side, and the threaded opening (1016) is adapted to the threaded rod (1014).

5. A rigid crane telescopic boom according to claim 1, characterized in that: A rubber sleeve (3011) is fitted around the outer periphery of the roller (301) at the contact point with the arm (2).

6. A rigid crane telescopic boom according to claim 1, characterized in that: The left and right ends of the roller (301) extend into the interior of the fixed seat (302) and are welded with connectors (3012).

7. A rigid crane telescopic boom according to claim 1, characterized in that: The inner top of the groove (303) and the outer periphery of the connector (3012) are provided with a first semi-circular groove (3031), which is adapted to the connector (3012).

8. A rigid crane telescopic boom according to claim 1, characterized in that: The top of the slider (304) and the periphery of the connector (3012) are provided with a second semi-circular groove (3041), which is adapted to the connector (3012).

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