CN113697693A - Telescopic boom and engineering machinery - Google Patents

Telescopic boom and engineering machinery Download PDF

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Publication number
CN113697693A
CN113697693A CN202110805106.9A CN202110805106A CN113697693A CN 113697693 A CN113697693 A CN 113697693A CN 202110805106 A CN202110805106 A CN 202110805106A CN 113697693 A CN113697693 A CN 113697693A
Authority
CN
China
Prior art keywords
arm
cylinder
pin
pin assembly
telescopic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110805106.9A
Other languages
Chinese (zh)
Inventor
刘强
沈昌武
王磊
崔寒珑
何伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zoomlion Heavy Industry Science and Technology Co Ltd
Original Assignee
Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zoomlion Heavy Industry Science and Technology Co Ltd filed Critical Zoomlion Heavy Industry Science and Technology Co Ltd
Priority to CN202110805106.9A priority Critical patent/CN113697693A/en
Publication of CN113697693A publication Critical patent/CN113697693A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/10—Telescoping systems
    • F16B7/14—Telescoping systems locking in intermediate non-discrete positions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/20—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using bayonet connections

Abstract

The invention relates to the field of arm supports and discloses a telescopic arm support and engineering machinery. The arm pin assembly and the cylinder pin assembly can be synchronously driven to move, and the unlocking of the arm pin assembly and the locking of the cylinder pin assembly or the locking of the arm pin assembly and the unlocking of the cylinder pin assembly are synchronously realized, so that the arm section can be more quickly and conveniently moved to extend and retract or be locked, the locking and unlocking operation of the arm section is simplified, and the working efficiency is improved.

Description

Telescopic boom and engineering machinery
Technical Field
The invention relates to the field of arm supports, in particular to a telescopic arm support and an engineering machine.
Background
The telescopic arm support comprises a plurality of arm sections which are sequentially sleeved from inside to outside, adjacent arm sections are locked through arm pins, the arm sections extend out and retract and are driven through the same telescopic oil cylinder, and correspondingly, the telescopic oil cylinder is provided with a cylinder pin so as to realize locking and unlocking of the oil cylinder to be driven.
When one arm section needs to be extended or retracted, an arm pin of the arm section needs to be unlocked, and meanwhile, the telescopic oil cylinder and the arm section need to be locked through a cylinder pin. In the prior art, the locking and unlocking operations of the arm pin and the cylinder pin are complex, the operation time is long, and the efficiency is low.
Disclosure of Invention
The invention aims to provide a telescopic arm support to solve the problem that the respective unlocking and locking operations of an arm section and an oil cylinder are complicated.
In order to achieve the above object, an aspect of the present invention provides a telescopic boom, wherein the telescopic boom comprises a boom section, a boom pin assembly mounted to the boom section, a telescopic cylinder, a cylinder pin assembly connected to the telescopic cylinder, a link assembly capable of drivingly connecting the boom pin assembly and the cylinder pin assembly, and a driving member capable of driving the link assembly, the driver is capable of driving the arm pin assembly to move from the first locked position to the first unlocked position via the linkage assembly and synchronously driving the cylinder pin assembly to move from the second unlocked position to the second locked position, and the driver is capable of driving the arm pin assembly from the first unlocked position to the first locked position via the linkage assembly and simultaneously driving the cylinder pin assembly from the second locked position to the second unlocked position.
Alternatively, the link assembly includes a transmission link having both ends respectively engaged with the arm pin assembly and the cylinder pin assembly, the transmission link being rotatably hinged to the telescopic cylinder through a first hinge point between the both ends, and the driving member being capable of driving the transmission link to rotate about the first hinge point to synchronously move the arm pin assembly and the cylinder pin assembly.
Optionally, the telescopic arm support comprises two arm pin assemblies and two cylinder pin assemblies which are mounted on the arm section, the connecting rod assembly comprises two transmission connecting rods, and the driving part is a driving oil cylinder with two ends respectively hinged to the two transmission connecting rods.
Optionally, the connecting rod assembly comprises a synchronous connecting rod, two ends of the synchronous connecting rod are respectively hinged to the two transmission connecting rods, one end of the synchronous connecting rod and the driving oil cylinder are hinged to the same hinge point, and the other end of the synchronous connecting rod and the driving oil cylinder are hinged to different hinge points.
Optionally, the arm pin assembly includes an arm pin extending in a transverse direction, the arm pin being provided with a groove extending in the length direction, the telescopic cylinder being capable of driving the drive link between an engaged position in the groove and a disengaged position out of the groove.
Optionally, the cylinder pin assembly comprises a cylinder pin extending in a transverse direction, and in the engaged position, the central axis of the arm pin and the central axis of the cylinder pin are in the same plane perpendicular to the length direction of the telescopic boom.
Optionally, the telescopic boom comprises a bushing fixed to the arm section, the cylinder pin being insertable into the bushing in the second locking position.
Optionally, the arm pin assembly includes a sleeve fixed to the arm section and receiving the arm pin therethrough, and an elastic member elastically acting between the sleeve and the arm pin.
Optionally, a shaft shoulder is arranged on the outer periphery of the arm pin, a first step surface and a second step surface are arranged on the inner periphery of the sleeve, the shaft shoulder can be stopped on the first step surface, and the elastic element is sleeved on the arm pin and located between the second step surface and the shaft shoulder.
On the other hand, the invention also provides engineering machinery, wherein the engineering machinery is provided with the telescopic arm support in the scheme.
Through the technical scheme, the arm pin assembly and the cylinder pin assembly can be synchronously driven to move, and the unlocking of the arm pin assembly and the locking of the cylinder pin assembly or the locking of the arm pin assembly and the unlocking of the cylinder pin assembly are synchronously realized, so that the arm section can be more quickly and conveniently moved, extended and retracted or locked, the locking and unlocking operation of the arm section is simplified, and the working efficiency is improved.
Drawings
Fig. 1 is a cross-sectional view of a telescopic boom according to an embodiment of the present invention, wherein a boom pin is in a first locked position and a cylinder pin is in a second unlocked position;
fig. 2 is a cross-sectional view of the telescopic boom according to the embodiment of the present invention, wherein the boom pin is in a first unlocked position and the cylinder pin is in a second locked position;
fig. 3 is a sectional view of the telescopic boom according to the embodiment of the present invention, wherein the telescopic cylinder, the driving cylinder and the connecting rod assembly are not shown;
fig. 4 is a schematic structural view of an arm pin assembly according to an embodiment of the present invention.
Description of the reference numerals
1 arm section and 2 hinge lug
3 telescopic oil cylinder 4 driving oil cylinder
5 Transmission connecting rod 6 synchronous connecting rod
7 arm pin 8 sleeve
9 elastic part 10 shaft shoulder
11 groove 12 cylinder pin
13 liner
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The invention provides a telescopic boom frame, which comprises a boom section 1, a boom pin assembly mounted on the boom section 1, a telescopic oil cylinder 3, a cylinder pin assembly connected to the telescopic oil cylinder 3, a connecting rod assembly capable of being in transmission connection with the boom pin assembly and the cylinder pin assembly, and a driving piece capable of driving the connecting rod assembly, wherein the driving piece can drive the boom pin assembly to move from a first locking position to a first unlocking position through the connecting rod assembly and synchronously drive the cylinder pin assembly to move from a second unlocking position to a second locking position, and the driving piece can drive the boom pin assembly to move from the first unlocking position to the first locking position through the connecting rod assembly and synchronously drive the cylinder pin assembly to move from the second locking position to the second unlocking position.
The telescopic arm support can comprise a plurality of arm sections sleeved from inside to outside in sequence, the arm section 1 is one of other arbitrary arm sections except for the outermost arm section, or the other arm sections except for the outermost arm section can be designed into a structure similar to the arm section 1, namely, an arm pin assembly is arranged.
The cylinder pin assembly on the telescopic cylinder 3 can be locked or unlocked with the arm section 1, when the cylinder pin assembly is in the second locking position, the telescopic cylinder 3 is locked with the arm section 1, the telescopic motion of the telescopic cylinder 3 can drive the arm section 1 to stretch along the length direction of the arm frame assembly, when the cylinder pin assembly is in the second unlocking position, the telescopic cylinder 3 is unlocked with the arm section 1, and the telescopic cylinder 3 is independent of the arm section 1 to move. Only one telescopic oil cylinder 3 can drive other arm joints except the outermost arm joint to extend out and retract, and the arm frame assembly is extended or shortened. The telescopic cylinder 3 has one end (e.g., a cylinder bottom end) fixed to the outermost arm section or other support structure and the other end (e.g., a cylinder head end) selectively connected to the other arm section, so as to drive the other arm section to extend or retract.
The arm pin assembly on the arm section 1 can enable the arm section 1 to be locked or unlocked with a next-stage arm section adjacent to the outer side of the arm section 1, the arm section 1 and the next-stage arm section are locked at a first locking position and cannot move relatively, and the arm section 1 and the next-stage arm section are unlocked at a first unlocking position, and the arm section 1 can extend or retract relative to the next-stage arm section. The locking structure matched with the arm pin assembly can be arranged on the next-level arm section, the arm pin assembly can be arranged at the bottom end of the arm section 1, the locking structure can be arranged at the bottom end and the top end of the next-level arm section, when the arm section 1 is completely retracted into the next-level arm section, the arm pin assembly can be locked with the locking structure at the bottom end, when the arm section 1 assembly completely extends out of the next-level arm section, the arm pin assembly can be locked with the locking structure at the top end, and of course, the locking structure can also be arranged in the middle of the next-level arm section to lock the arm section 1 at the partially extending position.
In the scheme, the arm pin assembly and the cylinder pin assembly are driven by the driving piece, particularly, the connecting rod assembly is used for transmission, under the transmission action of the connecting rod assembly, the arm pin assembly and the cylinder pin assembly can be synchronously driven to move, the cylinder pin assembly is located at the second unlocking position when the arm pin assembly is located at the first locking position, the cylinder pin assembly is located at the second locking position when the arm pin assembly is located at the first unlocking position, and therefore the arm section 1 can be allowed to be locked on the telescopic oil cylinder 3 when unlocked with the next arm section, and the arm section 1 is unlocked with the telescopic oil cylinder 3 when locked with the next arm section.
In the scheme, the arm pin assembly and the cylinder pin assembly can be synchronously driven to move, and the unlocking of the arm pin assembly and the locking of the cylinder pin assembly or the locking of the arm pin assembly and the unlocking of the cylinder pin assembly are synchronously realized, so that the arm section can be more quickly and conveniently moved, stretched and retracted or locked, the locking and unlocking operation of the arm section is simplified, and the working efficiency is improved.
Specifically, the link assembly includes a transmission link 5, two ends of the transmission link 5 are respectively engaged with the arm pin assembly and the cylinder pin assembly, the transmission link 5 is rotatably hinged to the telescopic cylinder 3 through a first hinge point between the two ends, and the driving member can drive the transmission link 5 to rotate around the first hinge point so as to synchronously move the arm pin assembly and the cylinder pin 12 combination. As shown in fig. 1 and 2, the transmission link 5 is hinged to the hinge lug 2 on the telescopic cylinder 3 at a first hinge point between the two ends, when the driving member drives the transmission link 5 to rotate around the first hinge point, the two ends of the transmission link 5 can respectively drive the arm pin assembly and the cylinder pin assembly to move, i.e. respectively move between the unlocking position and the locking position, the movement of the two ends of the transmission link 5 is synchronous, and the driving action on the arm pin assembly and the cylinder pin assembly is kept synchronous. In other embodiments, the drive link 5 may be moved in other manners, such as in a straight line, and the arm pin assembly and the cylinder pin assembly may be moved by both ends, and the linkage assembly may include other links drivingly connected to the drive link 5 to transmit the movement of the drive link 5 to the arm pin assembly and the cylinder pin assembly, respectively.
The telescopic arm support comprises two arm pin assemblies and two cylinder pin assemblies which are arranged on the arm section 1, the connecting rod assembly comprises two transmission connecting rods 5, and the driving piece is a driving oil cylinder 4 of which two ends are respectively hinged to the two transmission connecting rods 5. Each transmission link 5 corresponds to one arm pin assembly and one cylinder pin assembly, and both transmission links 5 are driven by the same driving cylinder 4. As shown in fig. 1 and 2, the end of the driving cylinder 4 is hinged to a position outside the first hinge point of the transmission link 5, so that the two transmission links 5 are respectively driven to rotate around the respective first hinge points by the extension and contraction of the driving cylinder 4, and the driving arm pin assembly and the cylinder pin assembly are driven to move.
Furthermore, the connecting rod assembly comprises a synchronous connecting rod 6, two ends of the synchronous connecting rod are respectively hinged to the two transmission connecting rods 5, one end of the synchronous connecting rod 6 and the driving oil cylinder 4 are hinged to the same hinge point, and the other end of the synchronous connecting rod 6 and the driving oil cylinder 4 are hinged to different hinge points. As shown in fig. 1 and 2, the synchronous connecting rod 6 and the driving cylinder 4 are hinged to the same hinge point on the left transmission connecting rod 5, and are hinged to two different hinge points on the right transmission connecting rod 5, so that the synchronous connecting rod 6, the driving cylinder 4 and the right transmission connecting rod 5 form a triangle, the length of the synchronous connecting rod 6 and the distance between the two hinge points on the transmission connecting rod 5 are fixed, only the driving cylinder 4 can change the length through extension and retraction, namely, the triangle only has one changeable side, therefore, according to the principle that only one triangle is determined by three sides, when the length of the driving cylinder 4 is determined, the included angle between the driving cylinder 4 and the right transmission connecting rod 5 is also determined uniquely. In addition, the driving oil cylinder 4, the two transmission connecting rods 5 and the parts between the two hinge lugs 2 form a quadrangle, when the length of the driving oil cylinder 4 is determined, correspondingly, the included angle between the driving oil cylinder 4 and the right transmission connecting rod 5 is determined, and the shape of the quadrangle is also determined. That is, due to the restraining effect of the synchronizing link 6, when the length of the drive cylinder 4 is determined, the positions of the two transmission links 5 relative to the drive cylinder 4 are also determined, i.e., it is ensured that the transmission links 5 move synchronously and the two sets of arm pin assemblies and cylinder pin assemblies move synchronously to achieve synchronous unlocking and locking of the respective structures.
Wherein the arm pin assembly comprises an arm pin 7 extending in a transverse direction, the arm pin 7 being provided with a groove 11 extending in the length direction, the telescopic cylinder 3 being capable of driving the transmission link 5 between an engaged position in the groove 11 and a disengaged position out of the groove 11. The connecting rod assembly and the cylinder pin assembly are arranged on the telescopic cylinder 3, the arm pin assembly is arranged on the arm joint 1, as shown in fig. 3, a groove 11 is formed on an arm pin 7 of the arm pin assembly, when the transmission connecting rod 5 moves along the length direction of the telescopic arm support along with the telescopic cylinder 3, the end part of the transmission connecting rod 5 corresponding to the arm pin 7 can move to a joint position located in the groove 11 and a separation position away from the groove 11, when the transmission connecting rod 5 is driven to rotate around the first hinge point (hinge lug 2), the connecting rod can act on the arm pin 7, namely two side surfaces of the groove 11, so that the arm pin 7 can move between a first unlocking position and a first locking position, and when the transmission connecting rod 5 is located at the separation position, the arm pin 7 cannot act on the arm pin 7.
Wherein the cylinder pin assembly comprises a cylinder pin 12 extending in a transverse direction, and in the engaged position the centre axis of the arm pin 7 and the centre axis of the cylinder pin 12 are in the same plane perpendicular to the length direction of the telescopic boom. The driver, via the linkage assembly, drives the arm pin 7 between the first unlocked position and the first locked position, while driving the cylinder pin 12 between the second unlocked position and the second locked position. The arm pin 7 is located on the arm section 1, the cylinder pin 12 is located on the telescopic cylinder 3, and when the telescopic cylinder 3 is moved to enable the transmission connecting rod 5 to be located at the joint position, the driving piece can synchronously drive the arm pin 7 and the cylinder pin 12, and the arm pin 7 and the cylinder pin 12 are located in the same plane perpendicular to the length direction, so that the arm pin assembly and the cylinder pin assembly are integrated, and the structure is more compact.
In addition, the telescopic boom comprises a bushing 13 fixed to the arm section 1, and in the second locking position, the cylinder pin 12 can be inserted into the bushing 13. The cylinder pin 12 can be fitted with the bush 13, and in the second locking position, the cylinder pin 12 is inserted into the bush 13 to lock the telescopic cylinder 3 with the arm section 1, and in the second unlocking position, the cylinder pin 12 is disengaged from the bush 13 to unlock the telescopic cylinder 3 with the arm section 1.
Further, the arm pin assembly includes a sleeve 8 fixed to the arm section 1 and receiving the arm pin 7 therethrough, and an elastic member 9 elastically acting between the sleeve 8 and the arm pin 7. The sleeve 8 can support the arm pin 7, the sleeve 8 is located inside the arm section 1, and the arm pin 7 can pass through the sleeve 8 and be inserted into the locking hole of the adjacent outer arm section to realize the locking of the arm section 1 and the adjacent outer arm section. The elastic member 9 can move the arm pin 7 toward the first locking position, which can be protected in case the arm pin 7 is not subjected to the force of the transmission link 5.
Further, a shaft shoulder 10 is arranged on the outer periphery of the arm pin 7, a first step surface and a second step surface are arranged on the inner periphery of the sleeve 8, the shaft shoulder 10 can be stopped on the first step surface, and the elastic piece 9 is sleeved on the arm pin 7 and located between the second step surface and the shaft shoulder 10. As shown in fig. 1, 2 and 4, the shoulder 10 may be stopped on the first step surface of the sleeve 8, the first step surface blocks the arm pin 7 from further protruding outward, and the elastic member 9 is located between the shoulder 10 and the second step surface, which is in a compressed state, and may move the arm pin 7 to the first locking position. As shown in fig. 1-3, the arm pin 7 may include a two-stage structure, one of which is engaged with the sleeve 8, the other end of which is formed with a groove 11 to engage with the transmission link 5, and one end of the sleeve 8 away from the arm section 1 is provided with a retainer ring, i.e., the retainer ring forms a second step surface, and the retainer ring can be removed to facilitate installation of the elastic member 9 and the arm pin 7.
The following describes the operation process of the telescopic boom according to the present invention according to a preferred embodiment of the present invention:
as shown in fig. 1, the arm section 1 is in a fully retracted position (or a fully extended position, which will be described below by way of example), the telescopic cylinder 3 is in a retracted position, the arm pin assembly is in a first locking position, the arm pin 7 is inserted into a first locking hole of an adjacent outer layer arm section, the cylinder pin assembly is in a second unlocking position, and the driving cylinder 4 is in an extended state; the driving oil cylinder 4 is contracted, the arm pin 7 is driven to move to a first unlocking position through the transmission connecting rod 5 so as to be separated from a first locking hole of an adjacent outer arm section, and meanwhile, the transmission connecting rod 5 drives the cylinder pin 12 to move to a second locking position so as to lock the telescopic oil cylinder 3 on the arm section 1, as shown in fig. 2; the telescopic oil cylinder 3 extends to enable the arm section 1 to extend to a fully extending position from the adjacent outer layer arm section; the driving oil cylinder 4 extends to enable the arm pin 7 to move to the first locking position to be inserted into a second locking hole of the adjacent outer-layer arm section, and meanwhile, the cylinder pin 12 retracts from the bushing 13 to reach a second unlocking position, so that the telescopic oil cylinder 3 and the arm section 1 are unlocked; the arm section 1 can be retracted by adopting the reverse operation; after the telescopic oil cylinder 3 is unlocked from the arm section 1, the telescopic oil cylinder 3 can be retracted to be matched with the adjacent outer arm section of the arm section 1 so as to move the adjacent outer arm section to a fully extended position; similar operation, the arm sections can be sequentially extended from the inside to the outside or sequentially retracted from the outside to the inside.
In addition, the invention also provides engineering machinery, wherein the engineering machinery is provided with the telescopic arm support in the scheme. The engineering machinery can be equipment using a telescopic boom, such as a crane, a concrete pump truck and the like.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the specific features in any suitable way, and the invention will not be further described in relation to the various possible combinations in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims (10)

1. A telescopic arm support is characterized by comprising an arm joint (1), an arm pin assembly arranged on the arm joint (1), a telescopic oil cylinder (3), a cylinder pin assembly connected with the telescopic oil cylinder (3), a connecting rod assembly capable of being in transmission connection with the arm pin assembly and the cylinder pin assembly, and a driving piece capable of driving the connecting rod assembly, the driver is capable of driving the arm pin assembly to move from the first locked position to the first unlocked position via the linkage assembly and synchronously driving the cylinder pin assembly to move from the second unlocked position to the second locked position, and the driver is capable of driving the arm pin assembly from the first unlocked position to the first locked position via the linkage assembly and simultaneously driving the cylinder pin assembly from the second locked position to the second unlocked position.
2. Telescopic boom according to claim 1, characterized in that the linkage assembly comprises a transmission link (5), both ends of the transmission link (5) being engaged with the arm pin assembly and the cylinder pin assembly, respectively, the transmission link (5) being rotatably hinged to the telescopic cylinder (3) by a first hinge point between the two ends, the driving member being able to drive the transmission link (5) to rotate around the first hinge point to move the arm pin assembly and the cylinder pin (12) combination synchronously.
3. The telescopic boom support according to claim 2, characterized in that the telescopic boom support comprises two boom pin assemblies and two cylinder pin assemblies mounted on the boom section (1), the connecting rod assembly comprises two transmission connecting rods (5), and the driving member is a driving cylinder (4) with two ends respectively hinged to the two transmission connecting rods (5).
4. The telescopic boom support according to claim 3, wherein the connecting rod assembly comprises a synchronous connecting rod (6) with two ends respectively hinged to the two transmission connecting rods (5), one end of the synchronous connecting rod (6) is hinged to the same hinge point with the driving oil cylinder (4), and the other end of the synchronous connecting rod (6) is hinged to different hinge points with the driving oil cylinder (4).
5. A telescopic boom according to claim 3, characterized in that the boom pin assembly comprises a boom pin (7) extending in a transverse direction, the boom pin (7) being provided with a groove (11) extending in the length direction, the telescopic ram (3) being capable of driving the transmission link (5) between an engaged position in the groove (11) and a disengaged position out of the groove (11).
6. A telescopic boom according to claim 5, characterized in that the cylinder pin assembly comprises a cylinder pin (12) extending in a transverse direction, in which engaged position the centre axis of the boom pin (7) and the centre axis of the cylinder pin (12) are in the same plane perpendicular to the length direction of the telescopic boom.
7. Telescopic boom according to claim 6, characterized in that it comprises a bushing (13) fixed to the arm section (1), the cylinder pin (12) being insertable into the bushing (13) in the second locking position.
8. A telescopic boom according to claim 5, characterized in that the arm pin assembly comprises a sleeve (8) fixed to the arm section (1) and accommodating the arm pin (7) therethrough, a spring (9) acting elastically between the sleeve (8) and the arm pin (7).
9. The telescopic boom support according to claim 8, characterized in that a shoulder (10) is arranged on the outer circumference of the arm pin (7), a first step surface and a second step surface are arranged on the inner circumference of the sleeve (8), the shoulder (10) can stop the first step surface, and the elastic member (9) is sleeved on the arm pin (7) and located between the second step surface and the shoulder (10).
10. A working machine, characterized in that the working machine is provided with a telescopic boom according to any of claims 1-9.
CN202110805106.9A 2021-07-16 2021-07-16 Telescopic boom and engineering machinery Pending CN113697693A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110805106.9A CN113697693A (en) 2021-07-16 2021-07-16 Telescopic boom and engineering machinery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110805106.9A CN113697693A (en) 2021-07-16 2021-07-16 Telescopic boom and engineering machinery

Publications (1)

Publication Number Publication Date
CN113697693A true CN113697693A (en) 2021-11-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110805106.9A Pending CN113697693A (en) 2021-07-16 2021-07-16 Telescopic boom and engineering machinery

Country Status (1)

Country Link
CN (1) CN113697693A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6216895B1 (en) * 1998-03-18 2001-04-17 Grove U.S. L.L.C. Lateral jib locking device
JP2001278582A (en) * 2000-03-29 2001-10-10 Tadano Ltd Boom extension mechanism for moving crane
CN100999298A (en) * 2006-12-28 2007-07-18 长沙中联重工科技发展股份有限公司 Connecting rod type carrying pin inserting mechanism for crane
CN107601306A (en) * 2017-09-14 2018-01-19 北汽福田汽车股份有限公司 Telescopic arm structure and there is its engineering machinery
CN111332963A (en) * 2018-12-19 2020-06-26 西法股份公司 Telescopic boom for crane and crane comprising telescopic boom

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6216895B1 (en) * 1998-03-18 2001-04-17 Grove U.S. L.L.C. Lateral jib locking device
JP2001278582A (en) * 2000-03-29 2001-10-10 Tadano Ltd Boom extension mechanism for moving crane
CN100999298A (en) * 2006-12-28 2007-07-18 长沙中联重工科技发展股份有限公司 Connecting rod type carrying pin inserting mechanism for crane
CN107601306A (en) * 2017-09-14 2018-01-19 北汽福田汽车股份有限公司 Telescopic arm structure and there is its engineering machinery
CN111332963A (en) * 2018-12-19 2020-06-26 西法股份公司 Telescopic boom for crane and crane comprising telescopic boom

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Application publication date: 20211126