A locking device for a multi-section telescopic mechanism

Abstract

The present invention relates to the technical field of multi-section telescopic rods, and specifically to a locking device of a multi-section telescopic mechanism, comprising an outer tube, an inner tube, an inner tube sleeve, a second trigger piece, a first locking piece, an intermediate tube sleeve, an intermediate tube and a second locking piece. The first locking piece and the second locking piece have the same structure but different installation positions. The first locking piece is fixed on the inner tube sleeve, and the second locking piece is fixed on the intermediate tube sleeve. The second trigger piece is in a locked state when it is away from the first locking piece. When the second trigger piece on the inner tube is inserted into the locking wheel inside the first locking piece, the spring in the limit pin rebounds, causing the other locking wheel to bounce off the first trigger piece in the second locking piece, and then the second locking piece is away from the first locking piece to reach an unlocked state. The locking piece has a simple structure, and is unlocked by inserting the second trigger piece, which reduces the unlocking sound, increases the unlocking accuracy, and has a large load capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-section telescopic rods, and in particular to a locking device of a multi-section telescopic mechanism. Background Art

[0002] The section-by-section lifting rod has a simple structure and is easy to operate. It has been widely used in military and civilian fields. The automatic positioning lifting equipment has an internal lock and an external lock that are not related to each other. The locking and unlocking actions of the internal lock and the external lock are independent of each other. There is a situation where the internal lock cannot be locked in time after the external lock is unlocked, or the external lock cannot be locked in time after the internal lock is unlocked, which may lead to serious faults such as collapse of the lifting equipment or lifting out of sequence. Therefore, an integrated locking mechanism will be used.

[0003] However, the existing integrated locking mechanism has a complex appearance and structure, low unlocking precision, small load-bearing capacity, and loud unlocking noise. Summary of the Invention

[0004] The purpose of the present invention is to provide a locking device for a multi-section telescopic mechanism, aiming to solve the problems of the existing integrated locking mechanism, such as complex appearance and structure, low unlocking accuracy, small load-bearing capacity and loud unlocking noise.

[0005] To achieve the above-mentioned object, the present invention provides a locking device for a multi-section telescopic mechanism, comprising an outer tube, an inner tube, an inner tube sleeve, a second triggering member, a first locking member, an intermediate tube sleeve, an intermediate tube, and a second locking member;

[0006] The inner tube is arranged in the outer tube; the inner tube sleeve is slidably overlapped on the inner tube, and the inner tube sleeve is fixedly connected to one end of the intermediate tube; the second trigger member is arranged on the other side of the inner tube; the first locking member is arranged on one side of the inner tube sleeve; the first locking member includes a locking shell, two locking wheels, a limit pin, a spring and a first trigger member, and the locking shell is arranged on one side of the inner tube sleeve; the limit pin is installed on the locking shell and is located between the two locking wheels; the spring is rotatably arranged between the two limit pins; the first trigger member is arranged on one side of the locking shell; the intermediate tube is arranged outside the inner tube and is coaxially arranged with the inner tube; the intermediate tube sleeve is slidably overlapped on the intermediate tube, and the intermediate tube sleeve is fixedly connected to one end of the outer tube; the second locking member is arranged on one side of the intermediate tube sleeve.

[0007] In which, the locking shell has a first locking cavity and a second locking cavity, the two locking wheels are rotatably installed in the first locking cavity and the second locking cavity respectively, the locking cavity matches the locking wheel, the first locking cavity is located on one side of the locking shell; the second locking cavity is located on the side of the locking shell close to the first locking cavity; the locking shell is either integral or split.

[0008] Wherein, the locking shell further has a pin hole, the limiting pin is installed in the pin hole, and the pin hole is located at the intersection of the two locking cavities of the locking shell.

[0009] In which, the locking wheel has a locking groove and a locking arc, the locking groove is located on one side of the circumferential surface of the locking wheel, the cross-section of the locking groove is any one of V-shaped, trapezoidal, arc-shaped or a combination thereof, and matches the triggering heads of the first trigger member and the second trigger member; the locking arc is located on the side of the circumferential surface of the locking wheel away from the locking groove, the cross-section of the locking arc is arc-shaped, and matches the circumferential surface of the locking wheel.

[0010] Wherein, the locking wheel further has a steering tongue and a bearing tongue, the steering tongue is located on one side of the locking wheel lock groove; the bearing tongue is located on the side of the locking wheel lock groove away from the steering tongue.

[0011] Wherein, the limiting pin has a spring mounting hole, and the spring mounting hole is coaxial with the outer circle of the limiting pin.

[0012] Wherein, the spring includes two straight arms and a deformation bend, the two straight arms are rotatably connected to the two spring mounting holes respectively and are respectively located between the two spring mounting holes; the deformation bend is fixedly connected to the two straight arms respectively and is located between the two straight arms.

[0013] Among them, the first trigger member has a trigger head, which is a straight surface or arc-shaped protruding structure, matching the locking groove of the locking wheel, and the trigger head is located on one side of the first trigger member; the second trigger member has a trigger head, which is a straight surface or arc-shaped protruding structure, matching the locking groove of the locking wheel, and the trigger head is located on one side of the second trigger member.

[0014] The number of the intermediate tubes and intermediate tube sleeves is n, where n≥1, and the number of the outer tubes and inner tubes is 1.

[0015] In a locking device for a multi-section telescopic mechanism of the present invention, the first locking member and the second locking member have the same structure but different installation positions. The first locking member is fixed to the inner pipe sleeve, and the second locking member is fixed to the middle pipe sleeve.

[0016] During the extension of the multi-section telescopic rod, when the second trigger member moves away from the first locking member and the trigger head of the first trigger member of the second locking member is inserted into the locking groove of the locking wheel on the outer side of the first locking member, the locking state is reached. At this time, the spring is in the locking cavity where the inner locking wheel is located. The spring and the limit pin elastically position the inner locking wheel of the first locking member. The outer circumference of the inner locking wheel rotates into the locking arc of the outer locking wheel, restricting the rotation of the outer locking wheel, thereby locking the intermediate tube and the outer tube and preventing relative telescopic movement. When the trigger head of the second trigger member on the inner tube is inserted into the locking groove of the locking wheel on the inner side of the first locking member, the outer circumference of the locking wheel rotates out of the locking arc of the outer locking wheel, simultaneously pushing the spring into the locking cavity where the outer locking wheel is located. After the spring passes the midpoint, it causes the outer locking wheel to rotate, disengaging the first trigger member from the second locking member. The second locking member then moves away from the first locking member, unlocking the intermediate tube and allowing it to telescopically move relative to the outer tube. As the middle tube and outer tube unlock, the trigger head of the second trigger member on the inner tube inserts into the locking groove of the locking wheel on the inner side of the first locking member. The spring and the limit pin elastically position the locking wheel on the outer side of the first locking member. The outer circumferential surface of the locking wheel on the outer side of the first locking member rotates into the locking arc of the inner locking wheel, restricting the rotation of the inner locking wheel, thereby locking the inner tube and the middle tube and preventing relative telescopic movement. This allows the tubes to be extended sequentially from the inside to the outside. After each tube section is fully extended, it automatically triggers the locking of the next tube section and simultaneously triggers the unlocking of the next tube section from the next tube section, thus achieving the sequential extension of the multi-section telescopic rod.

[0017] The retraction process of the multi-section telescopic rod is the reverse process of the above-mentioned extension process, thereby realizing the sequential retraction of each section from the outside to the inside. After each section of the tube is retracted into place, it automatically triggers the locking with the outer section of the tube and triggers the unlocking of the lock with the inner section of the tube.

[0018] The locking device of the multi-section telescopic mechanism has a simple structure, and the unlocking and locking actions are mutually restricted, which is safe and reliable. It can be unlocked by turning in accordance with the trend, with little unlocking sound, high unlocking precision and large load-bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0020] Figure 1 It is a schematic diagram of the locking state of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the unlocked state of the overall structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the overall structure of the locking member of the present invention.

[0023] Figure 4 It is a schematic diagram of the overall structure of the locking housing of the present invention.

[0024] Figure 5 It is a schematic diagram of the overall structure of the locking wheel of the present invention.

[0025] Figure 6 It is a schematic diagram of the overall structure of the spring of the present invention.

[0026] Figure 7 It is a schematic diagram of the overall structure of the limit pin of the present invention.

[0027] Figure 8 It is a schematic diagram of the overall structure of the trigger member of the present invention.

[0028] 101-outer tube, 102-inner tube, 103-inner tube sleeve, 104-second trigger member, 105-first locking member, 106-intermediate tube sleeve, 107-intermediate tube, 108-second locking member, 109-locking housing, 110-locking wheel, 111-limiting pin, 112-spring, 113-first trigger member, 114-first locking cavity, 115-second locking cavity, 116-locking groove, 117-locking arc, 118-steering tongue, 119-bearing tongue, 120-spring mounting hole, 121-straight arm, 122-deformation bend, 123-trigger head, 124-pin hole. DETAILED DESCRIPTION

[0029] See also Figures 1-8 ,in, Figure 1 This is a schematic diagram of the locking state of the overall structure of the present invention. Figure 2 This is a schematic diagram of the overall structure of the present invention in unlocked state. Figure 3 : is a schematic diagram of the overall structure of the locking member of the present invention, Figure 4 : is a schematic diagram of the overall structure of the locking housing of the present invention, Figure 5 This is a schematic diagram of the overall structure of the locking wheel of the present invention. Figure 6 Schematic diagram of the overall structure of the spring of the present invention, Figure 7 : is a schematic diagram of the overall structure of the limit pin of the present invention, Figure 8 It is a schematic diagram of the overall structure of the trigger member of the present invention.

[0030] The present invention provides a locking device for a multi-section telescopic mechanism, comprising an outer tube 101, an inner tube 102, an inner tube sleeve 103, a second triggering member 104, a first locking member 105, an intermediate tube sleeve 106, an intermediate tube 107, and a second locking member 108. The first locking member 105 comprises a locking housing 109, two locking wheels 110, a limiting pin 111, a spring 112, and a first triggering member 113. The locking housing 109 has a first locking cavity 114, a second locking cavity 115, and a pin hole 124. The locking wheel 110 has a locking groove 116, a locking arc 117, a steering tongue 118, and a load-bearing tongue 119. The limiting pin 111 has a spring mounting hole 120. The spring 112 comprises two straight arms 121 and a deformation bend 122. The first triggering member 113 has a triggering head 123. The above-mentioned solution solves the problems of the existing integrated locking mechanism, such as complex appearance and structure, low unlocking precision, small load capacity, and loud unlocking noise.

[0031] The first locking member 105 is provided on one side of the inner tube sleeve 103; the locking housing 109 is fixedly provided on one side of the inner tube sleeve 110; the limit pin 111 is finally installed on the locking housing 109 and is located between the two locking wheels 110; the spring 112 is rotatably provided between the two limit pins 111 and is located between the two limit pins 111; the first trigger member 113 is provided on one side of the locking housing 109; the intermediate tube 107 is provided outside the inner tube 102 and is coaxially arranged with the inner tube 102; the intermediate tube sleeve 106 is slidably provided on the intermediate tube 107, and the intermediate tube sleeve 106 is fixedly provided with one end of the outer tube When the second locking member 104 is inserted into the locking wheel 110 inside the first locking member 105, the spring 112 in the limit pin 111 rebounds, causing the other locking wheel 110 to bounce off the first trigger member 113 in the second locking member 108, and then the second locking member 108 is away from the first locking member 105 to reach the unlocked state. The locking member structure is simple, and unlocking is achieved by inserting the second trigger member 104, which reduces the unlocking sound, increases the unlocking accuracy, and has a large load capacity.

[0032] Secondly, the two locking wheels 110 are rotatably installed in the first locking cavity 114 and the second locking cavity 115 respectively. The locking cavity matches the locking wheel 110. The first locking cavity 114 is located on one side of the locking shell 109; the second locking cavity 115 is located on the side of the locking shell 109 close to the first locking cavity 114; the locking shell 109 is either an integral type or a split type. The first locking cavity 114 and the second locking cavity 115 respectively provide rotation limits for the two locking wheels 110, and the arcs are the same size and intersect.

[0033] At the same time, the limit pin 111 is installed in the pin hole 124, which is located at the intersection of the two lock cavities of the locking shell 109. The pin hole 124 is located in the middle position of the intersecting arcs of the two lock cavities. The pin hole 124 facilitates the insertion of the limit pin 111.

[0034] In addition, the locking groove 116 is located on one side of the circumferential surface of the locking wheel 110, and the cross-section of the locking groove 116 is any one of V-shaped, trapezoidal, arc-shaped or a combination thereof, and matches the triggering head of the first trigger member 113 and the second trigger member 104; the locking arc 117 is located on the side of the circumferential surface of the locking wheel 110 away from the locking groove 116, and the cross-section of the locking arc 117 is an arc-shaped, and matches the circumferential surface of the locking wheel 110. The locking groove 116 can be any one of an arc shape, a dihedral shape, a rectangle, and a polygon to adapt to the first trigger member 113, and the locking arc 117 is adapted to the outer cylinder of the locking wheel 110. After the two locking wheels 110 cooperate with each other, a gap is left to place the spring 112.

[0035] Furthermore, the steering tongue 118 is located on one side of the locking groove of the locking wheel 110; the bearing tongue 119 is located on the side of the locking groove of the locking wheel 110 away from the steering tongue 118, the steering tongue 118 is used to support the locking wheel 110 for rotation, and the bearing tongue 119 is used to carry the first trigger member 113 and cooperate with it.

[0036] However, the spring mounting hole 120 is coaxial with the outer circle of the limiting pin 111 , and the spring mounting hole 120 is used to support the installation of the spring 112 when the limiting pin 111 is set in the pin hole 124 in the locking housing 109 .

[0037] Then, the two straight arms 121 are respectively rotatably connected to the two spring mounting holes 120 and are respectively located between the two spring mounting holes 120; the deformation bend 122 is respectively fixedly connected to the two straight arms 121 and is located between the two straight arms 121, and the two straight arms 121 are respectively rotatably set in the spring mounting holes 120 to support the deformation bend 122 to rotate and push the two locking wheels 110 to rotate.

[0038] Finally, the trigger head 123 is a straight surface or arc-shaped protruding structure, which matches the locking groove of the locking wheel 110, and the trigger head 123 is located on one side of the first trigger member 113; the second trigger member 104 has a trigger head 123, and the trigger head 123 is a straight surface or arc-shaped protruding structure, which matches the locking groove of the locking wheel 110. The trigger head 123 is located on one side of the second trigger member 104, and the trigger head 123 matches the locking groove 116 in the locking wheel 110 to trigger the locking wheel 110 to achieve the unlocking or locking effect.

[0039] In the locking device of the multi-section telescopic mechanism described in the present invention, the first locking member 105 and the second locking member 108 have the same structure but different installation positions. The first locking member 105 is fixed to the inner sleeve 103, and the second locking member 108 is fixed to the intermediate sleeve 106. During the extension process of the multi-section telescopic rod, the second trigger member 104 is away from the first locking member 105, and the trigger head 123 of the first trigger member 113 of the second locking member 108 is inserted into the locking wheel 113 outside the first locking member 105. 0 is in the locking state. At this time, the spring is in the locking cavity where the inner locking wheel 110 is located. The spring 112 and the limit pin 111 elastically position the locking wheel 110 on the inner side of the first locking member 105. The outer circumferential surface of the inner locking wheel 110 rotates into the locking arc 117 of the outer locking wheel 110, thereby limiting the rotation of the outer locking wheel 110, so that the intermediate tube 107 and the outer tube are locked and cannot make relative telescopic movement. When the trigger head 123 of the second trigger member 104 on the inner tube 102 is inserted into the first When the locking wheel 110 on the inner side of the locking member 105 is locked in the locking groove 116, the outer circumferential surface of the locking wheel 110 rotates out of the locking arc 117 of the outer locking wheel 110, and at the same time pushes the spring 112 into the locking cavity where the outer locking wheel 110 is located. After the spring 112 passes the midpoint, it acts on the outer locking wheel 110 to rotate, disengaging the first trigger member 113 in the second locking member 108. Then the second locking member 108 moves away from the first locking member 105 to achieve unlocking, and the middle tube 107 can perform telescopic movement relative to the outer tube. At the same time that the tube 107 is unlocked from the outer tube, the trigger head 123 of the second trigger member 104 on the inner tube 102 is inserted into the locking groove 116 of the locking wheel 110 inside the first locking member 105. The spring 112 and the limit pin 111 elastically position the locking wheel 110 outside the first locking member 105. The outer circumferential surface of the locking wheel 110 outside the first locking member 105 rotates into the locking arc 117 of the inner locking wheel 110, restricting the rotation of the inner locking wheel 110. This locks the inner tube 102 and the middle tube 107 and prevents relative telescopic movement. This allows the tubes to be extended sequentially from the inside to the outside. After each tube section is fully extended, it automatically triggers the locking of the next tube section and simultaneously triggers the unlocking of the lock between the next tube section and the next tube section, thus achieving the sequential extension of the multi-section telescopic rod.

[0040] The retraction process of the multi-section telescopic rod is the reverse process of the above-mentioned extension process, thereby realizing the sequential retraction of each section from the outside to the inside. After each section of the tube is retracted into place, it automatically triggers the locking with the outer section of the tube and triggers the unlocking of the lock with the inner section of the tube.

[0041] The locking device of the multi-section telescopic mechanism has a simple locking structure, and the unlocking and locking actions are mutually restricted, which is safe and reliable. It can be unlocked by rotating in accordance with the trend, with little unlocking sound, high unlocking precision and large load-bearing capacity.

[0042] The above disclosure is merely one or more preferred embodiments of the present application and is not intended to limit the scope of the present application. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.

Claims

1. A locking device for a multi-section telescopic mechanism, characterized in that: It includes an outer tube, an inner tube, an inner tube sleeve, a second triggering member, a first locking member, an intermediate tube sleeve, an intermediate tube and a second locking member; The inner tube is arranged in the outer tube, and the second trigger is arranged on the outside of the inner tube; the inner tube sleeve is slidably overlapped on the inner tube, and the inner tube sleeve is fixedly connected to one end of the intermediate tube; the first locking member is arranged on one side of the inner tube sleeve; the first locking member includes a locking shell, two locking wheels, a limit pin, a spring and a first trigger, and the locking shell is fixedly arranged on one side of the inner tube sleeve; the limit pin is fixedly connected to the locking shell and is located between the two locking wheels; the spring is rotatably arranged between the two limit pins; the first trigger is arranged on one side of the locking shell; The intermediate tube is arranged outside the inner tube and is coaxially arranged with the inner tube; the intermediate tube sleeve is slidingly arranged on the intermediate tube, and the intermediate tube sleeve is fixedly connected to one end of the outer tube; the second locking piece is arranged on one side of the intermediate tube sleeve, and the locking shell has a first locking cavity and a second locking cavity, and the two locking wheels are rotatably installed in the first locking cavity and the second locking cavity respectively, and the locking cavity matches the locking wheel, the first locking cavity is located on one side of the locking shell; the second locking cavity is located on the side of the locking shell close to the first locking cavity; the two locking wheels cooperate with each other to reserve a gap for placing the spring, and the locking The shell is either an integral type or a split type, and the locking shell further has a pin hole, and the limit pin is installed in the pin hole, and the pin hole is located at the intersection of the two lock cavities of the locking shell, and the locking wheel has a locking groove and a locking arc, and the locking groove is located on one side of the circumference of the locking wheel, and the cross section of the locking groove is any one of a V-shape, a trapezoidal shape, and an arc shape or a combination thereof, and matches the triggering heads of the first trigger member and the second trigger member; the locking arc is located on the side of the circumference of the locking wheel away from the locking groove, and the cross section of the locking arc is an arc shape and matches the circumferential surface of the locking wheel. When the lock groove of the inner locking wheel is When the second trigger member is triggered, the inner locking wheel rotates, and the locking arc hits the spring to cause deformation, crosses the end point of the first locking cavity, enters the second locking cavity and hits the locking arc on the other locking wheel, so that the other locking wheel rotates. The limit pin has a spring mounting hole, and the spring mounting hole is located on one side of the limit pin. The spring includes two straight arms and a deformation bend. The two straight arms are respectively rotatably connected to the two spring mounting holes and are respectively located on one side of the two spring mounting holes; the deformation bend is respectively fixedly connected to the two straight arms and is located between the two straight arms.

2. A locking device for a multi-section telescopic mechanism according to claim 1, characterized in that: The locking wheel further comprises a steering tongue and a bearing tongue, wherein the steering tongue is located on one side of the locking wheel locking groove; and the bearing tongue is located on the side of the locking wheel locking groove away from the steering tongue.

3. The locking device of a multi-section telescopic mechanism according to claim 2, characterized in that: The first trigger member has a trigger head, which is a straight surface or arc-shaped protruding structure, matching the locking groove of the locking wheel, and the trigger head is located on one side of the first trigger member; the second trigger member has a trigger head, which is a straight surface or arc-shaped protruding structure, matching the locking groove of the locking wheel, and the trigger head is located on one side of the second trigger member.

4. The locking device of a multi-section telescopic mechanism according to claim 3, characterized in that: The number of the intermediate tubes and the intermediate tube sleeves is n, where n≥1, and the number of the outer tubes and the inner tubes is 1.

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