CN113153872B - Locking mechanism capable of locking at any position, bidirectional mechanical telescopic arm and method - Google Patents
Locking mechanism capable of locking at any position, bidirectional mechanical telescopic arm and method Download PDFInfo
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- CN113153872B CN113153872B CN202110076564.3A CN202110076564A CN113153872B CN 113153872 B CN113153872 B CN 113153872B CN 202110076564 A CN202110076564 A CN 202110076564A CN 113153872 B CN113153872 B CN 113153872B
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 131
- 230000033001 locomotion Effects 0.000 claims description 23
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- 238000012423 maintenance Methods 0.000 abstract 1
- 230000009471 action Effects 0.000 description 6
- 230000004308 accommodation Effects 0.000 description 3
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- 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
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- 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 provides a locking mechanism, a bidirectional mechanical telescopic arm and a method for locking at any position, comprising the following steps: the device comprises a transmission rod, a sliding part, a connecting part, a rotating body and a locking part; the transmission rod is connected with the rotating body through the sliding part, and the transmission rod and/or the rotating body are/is provided with a limiting structure for limiting the sliding of the sliding part, so that the rotating rod can drive the rotating body to rotate in a set direction; the connecting piece is rotationally connected with the transmission rod, and a structure matched with the locking piece is arranged on the connecting piece and used for realizing locking or unlocking of the locking piece when the connecting piece is positioned in a set area; can realize two-way flexible, optional position locking simultaneously, adopt hydraulic system can make flexible arm must use many sets of structural system cooperation work, simple structure, the maintenance of being convenient for, can two-way flexible and improve the convenience of use by a wide margin at the optional position locking.
Description
Technical Field
The disclosure belongs to the field of mechanical engineering instruments, and particularly relates to a locking mechanism capable of realizing locking at any position, a bidirectional mechanical telescopic arm and a method.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
The hydraulic system is mostly adopted for the stressed telescopic boom in the engineering field, the types of the less telescopic booms can realize bidirectional telescopic and optional position locking simultaneously, the adoption of the hydraulic system can ensure that the telescopic boom needs to use a plurality of systems for matching work, the structure is complex, and the damage probability is greatly improved; the inability to bi-directionally expand and contract and lock in any position greatly reduces ease of use.
Disclosure of Invention
In order to solve the technical problem, the present disclosure provides a locking mechanism, a bidirectional mechanical telescopic arm and a method capable of realizing locking at any position. The bidirectional mechanical telescopic arm at least comprises two telescopic arms which are nested with each other, and the inner arm piece can move in the guide groove of the outer arm piece through the protrusion of the inner arm piece, so that the correct movement direction is ensured. The arm pieces are connected and driven with each other through gears.
In a first aspect, the present disclosure provides a locking mechanism capable of achieving locking at any position, including: the device comprises a transmission rod, a sliding part, a connecting part, a rotating body and a locking part; the transmission rod is connected with the rotating body through the sliding part, and the transmission rod and/or the rotating body are/is provided with a limiting structure for limiting the sliding of the sliding part, so that the rotating rod can drive the rotating body to rotate in a set direction; the connecting piece is rotationally connected with the transmission rod, and the connecting piece is provided with a structure matched with the locking piece and used for realizing locking or unlocking of the locking piece at a set area of the connecting piece.
In a second aspect, the present disclosure provides a bidirectional telescopic arm capable of achieving any position locking, including: the telescopic boom comprises a first telescopic boom, a second telescopic boom, a third telescopic boom and a locking mechanism according to the first aspect, wherein the first telescopic boom is provided with a first locking mechanism and is connected with the second telescopic boom through the first locking mechanism, and the second telescopic boom is provided with a second locking mechanism and is connected with the third telescopic boom through the second locking mechanism.
In a third aspect, the present disclosure also provides a method for using the bidirectional telescopic arm as described in the second aspect, including:
the transmission rod is used for forward transmission to drive the sliding part to move, drive the first connecting piece to move to the locking piece and drive the second connecting piece to be away from the locking piece, so that the first locking piece is in an opening state, and the second locking piece is in a locking state;
after the first locking piece is opened and the second locking piece is locked, the transmission rod continues to rotate to drive the sliding piece to move to the limiting structure, so that the rotating body is connected with the transmission rod, the transmission rod drives the rotating body to rotate, and the second telescopic arm is driven to move forwards through the matching of the rotating body and the transmission structure;
when the transmission rod moves reversely, the first connecting piece and the second connecting piece move reversely, the first locking piece is gradually locked, and the second locking piece is gradually opened; slider reverse motion opens the back at first locking piece locking, second locking piece for the rotor is connected with the transfer line, and the transfer line drives the rotor and rotates, drives the flexible arm reverse motion of second through rotor and drive structure cooperation.
Compared with the prior art, this disclosure possesses following beneficial effect:
1. this disclose adoption can realize locking mechanism of optional position locking, include: the transmission rod, the sliding part, the connecting part, the rotating body and the locking part can be matched with a mechanical telescopic arm which can be bidirectionally telescopic, so that the locking at any position can be realized, and the rotating rod can drive the rotating body to rotate in a set direction; the connecting piece is rotationally connected with the transmission rod, and a structure matched with the locking piece is arranged on the connecting piece and used for realizing locking or unlocking of the locking piece when the connecting piece is positioned in a set area; the invention has simple structure, is convenient to maintain, can be locked at any position and greatly improves the use convenience.
2. The mechanical telescopic arm capable of being bidirectionally stretched comprises at least two telescopic arms which are mutually nested, the inner side arm piece can move in the guide groove of the outer side arm piece through the protrusion of the inner side arm piece, the correct movement direction is ensured, and a locking mechanism capable of realizing locking at any position is adopted, so that bidirectional movement and locking in the corresponding direction are realized in the process that the driving rod drives the mechanical arm through the rotating body; as shown in fig. 11, when the locking member is in the locking state, the braking clamp belt on the telescopic arm can pass through when moving towards the locking member, so that the technical problem of how to realize bidirectional telescopic and any position locking of the mechanical arm at the same time is solved.
Advantages of additional aspects of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a diagram illustrating an operating state of a telescopic boom according to an embodiment of the present disclosure;
FIG. 2 is a schematic front and back view of the third boom;
FIG. 3 is a schematic front and back view of the second boom;
FIG. 4 is a schematic front and back view of the first telescoping arm;
FIG. 5 is a schematic diagram of the bi-directional movement of the telescopic arm;
FIG. 6 is a schematic view of the overall structure of the class A transmission locking mechanism;
FIG. 7 is a schematic view of a class A transmission locking mechanism in a disassembled configuration;
FIG. 8 is a schematic view of the overall structure of the class B transmission locking mechanism;
FIG. 9 is a schematic view of a disassembled structure of the class B transmission locking mechanism;
FIG. 10 is a view of the class A drive latch mechanism in its operating condition;
FIG. 11 is a schematic view of the operation of the bayonet;
FIG. 12 is a view of the operating condition of the class B transmission locking mechanism;
in the figure: 1. a first telescopic arm; 2. a second telescopic arm; 3. a third telescopic arm; 4. an internal transmission and locking mechanism; 5. a first gear; 6. a first gear rack; 7a, a second gear; 7b, a third gear; 8. a second gear rack; 9. a third gear rack; 10. a first drive lever; 11. threading; 12. a bayonet lock; 13. a sliding disk; 14. a second transmission rod; 15. and (7) clamping a belt.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure herein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1
As shown in fig. 1, the present embodiment discloses a locking mechanism capable of achieving locking at any position, including: the device comprises a transmission rod, a sliding part, a connecting part, a rotating body and a locking part; the transmission rod is connected with the rotating body through the sliding part, and the transmission rod and/or the rotating body are/is provided with a limiting structure for limiting the sliding of the sliding part so that the transmission rod is driven in the forward direction to drive the rotating body to rotate in a set direction; the connecting piece is rotationally connected with the transmission rod, and the connecting piece is provided with a structure matched with the locking piece and used for realizing locking or unlocking of the locking piece at a set area of the connecting piece.
Furthermore, the rotating body is used for being connected with the mechanism to be locked and can drive the mechanism to be locked to move; when the connecting piece is located in the set area to realize the matching with the locking piece, the reverse driving transmission rod realizes that the locking piece locks the mechanism to be locked.
Furthermore, the transmission rod is connected with an external driving mechanism, and the external driving mechanism can be a motor; the transmission rod is provided with a strip-shaped bulge, and the sliding piece is provided with a groove matched with the strip-shaped bulge; the transmission rod is provided with a rotator in the area with the strip-shaped protrusions.
Furthermore, the sliding part is of an annular structure, a groove matched with the strip-shaped bulge is formed in the inner circle of the annular structure, and a bulge matched with the rotating body is formed in the outer circle of the annular structure.
In one embodiment, the slider is a sliding disk.
Further, the inside of rotor has the spout with the protruding complex of slider, and the regional department of setting for of spout sets up limit structure, and limit structure can adopt the spacing dish that sets up in the rotor both sides, or, sets up in the rotor inside and has the protruding block with the protruding complex of slider to be used for limiting displacement. The slider is installed on the dwang through interior circle, through the spout cooperation of excircle and rotor.
In one embodiment, the rotating body has a transmission member, which may be a toothed structure or a chain structure, and preferably, the rotating body is a first gear and a third gear.
In a further embodiment, the drive rod is fixedly connected to a rod drive at the predetermined region, the rod drive being at a predetermined distance from the rotor. Preferably, the lever transmission member is a second gear.
Furthermore, the connecting piece is a block structure with a threaded hole, and at least one side surface of the block structure is a surface with a size gradual change trend and can be an inclined surface or an arc surface. Be equipped with the screw thread region on the transfer line, the connecting piece passes through screw hole and the regional cooperation of transfer line screw thread, and the connecting piece tip has return spring, makes return spring and spring limit structure contact after the connecting piece motion breaks away from the screw thread region, and return spring is used for making the connecting piece be in screw thread region edge all the time, can make the connecting piece rotate to the screw thread region once more when the rotor is reverse motion, carries out the motion of settlement direction. The spring limiting structure can be a bulge arranged on the transmission rod, and other supporting surfaces with limiting functions can also be adopted. A side face of the connecting piece is provided with a guide structure, and the guide structure can be a guide bulge and can be matched with other guide grooves to perform linear motion with an unchanged angle.
In one embodiment, the connecting member is a screw thread, and the screw thread has a trapezoidal structure.
Furthermore, the locking piece is the ratchet structure, specifically is the ratchet of L type structure, and wherein the one end of L type structure is fixed through the pivot to can realize the locking with the opening action with the connecting piece cooperation, the inclined plane of the other end of L type structure is right triangle, can realize treating the locking action of locking mechanism.
In one embodiment, the locking member is a latch capable of engaging with a strap.
Furthermore, the connecting pieces are two and are respectively located on two sides of the transmission rod, the moving directions of the two connecting pieces are opposite, the locking pieces are correspondingly two, and the locking directions of the two locking pieces are opposite.
Example 2
The embodiment discloses a can realize two-way flexible arm of optional position locking, includes: the telescopic boom comprises a first telescopic boom, a second telescopic boom, a third telescopic boom and a locking mechanism according to the embodiment, wherein the first telescopic boom is provided with the first locking mechanism and is connected with the second telescopic boom through the first locking mechanism, and the second telescopic boom is provided with the second locking mechanism; and the second locking mechanism is connected with the third telescopic arm.
One side of the first telescopic arm is provided with a transmission mechanism of the first telescopic arm, one side of the second telescopic arm is provided with a transmission mechanism and a brake mechanism of the second telescopic arm, and one side of the third telescopic arm is provided with a transmission mechanism and a brake mechanism of the third telescopic arm. The brake mechanism is matched with the locking piece, and the transmission mechanism is matched with the rotating body.
As one implementation mode, the transmission mechanism is a transmission gear rack, the braking mechanism is a braking clamping belt, one side surface of the second telescopic arm is provided with the transmission gear rack and the braking clamping belt, and the number of the braking clamping belts is two, and the two braking clamping belts are respectively positioned on two sides of the transmission gear rack; the brake belts are respectively a first brake belt and a second brake belt, the lengths of the first brake belt and the second brake belt are half of the length of the transmission gear strip, the first transmission gear strip is positioned in the upper half area of the transmission gear strip, and the second brake belt is positioned in the lower half area of the transmission gear strip;
furthermore, one side surface of the third telescopic arm is also provided with two transmission gear strips and two braking clamping strips, wherein the directions of the racks of the two clamping strips are opposite, and the two braking clamping strips are respectively positioned on two sides of the transmission gear strips; the brake belts are respectively a first brake belt and a second brake belt, the lengths of the first brake belt and the second brake belt are half of the length of the transmission gear strip, the first transmission gear strip is positioned in the upper half area of the transmission gear strip, and the second brake belt is positioned in the lower half area of the transmission gear strip; wherein have between first braking cassette tape and the driving gear strip and set for the distance and form the accommodation space, set up transmission structure in the accommodation space between first braking cassette tape and driving gear strip, transmission structure in the accommodation space can cooperate with the pole driving member, the pole driving member is the second gear, and the transmission effect through the pole driving member can provide drive power for the motion of the flexible arm of third.
One side of the first telescopic arm is provided with a transmission structure of the first telescopic arm, and the transmission structure of the first telescopic arm is a transmission gear rack; the middle part of first flexible arm installs first locking mechanism, the middle part of the flexible arm of second installs the rotor of second locking mechanism and first locking mechanism.
Furthermore, the inner side of the first telescopic arm and the inner side of the second telescopic arm are both provided with a guide groove structure, the first telescopic arm is connected with the second telescopic arm through a guide groove, and the second telescopic arm is connected with the third telescopic arm through a guide groove; specifically, the telescopic arm comprises at least two telescopic arms which are nested with each other, and the inner arm piece can move in the guide groove of the outer arm piece through the protrusion of the inner arm piece, so that the correct moving direction is ensured. The arm pieces are connected and driven with each other through gears.
Specifically, as shown in fig. 1, the bidirectional telescopic boom capable of realizing locking at any position of the present embodiment includes a first telescopic boom 1, a second telescopic boom 2, and a third telescopic boom 3; in one embodiment, the first telescopic boom 1 is an outer boom 1, the second telescopic boom 2 is an intermediate boom 2, the third telescopic boom 3 is an inner boom 3, and the internal transmission and locking mechanism 4 is provided.
As shown in fig. 2-5, the first gear 5 installed on the first telescopic arm 1 is externally connected with a power source to drive the first gear rack 6 located at the outer side of the second telescopic arm 2 to move, so as to drive the second telescopic arm 2 to move. The second telescopic arm 2 moves to cause the second gear 7a installed in the second telescopic arm to interact with the second gear rack 8 located in the first telescopic arm 1, the second gear 7a and the third gear 7b rotate to drive the third gear rack 9 outside the first telescopic arm 1 to move, so that the third telescopic arm 3 moves, the moving directions of the three telescopic arms are the same, the telescopic arm moves in the reverse direction only by changing the rotating direction of the first gear 5, and the bidirectional telescopic arm is realized. Each telescopic arm has a guide groove on the inner side and a protrusion on the outer side for locking the limit position during the telescopic process.
The bidirectional telescopic arm capable of realizing locking at any position comprises a transmission and locking mechanism 4, which is divided into two forms, one is a type A arranged on the outermost telescopic arm as shown in fig. 6-7, and the other is a type B used for the inner telescopic arm as shown in fig. 8-9. The two mechanisms comprise a gear, a transmission rod, a screw thread, a clamping pin and a sliding disc.
As shown in the figures 6-7, the A-type mechanism is characterized in that a transmission rod 10 is connected with external power to drive the transmission rod to rotate and comprises three parts A, B1 and B2, wherein a part A with the same length as a gear is provided with a strip-shaped protrusion and matched with a sliding disc 13, the outer side of the sliding disc 13 is provided with a protrusion and matched with threads on the inner side of the gear, the sliding disc 13 can axially move along the gear in the gear under the action of the strip-shaped protrusion and the threads on the inner side of the gear in the rotating process of the transmission rod 10, and when the sliding disc moves to the ends of the two sides of the gear, the gear is locked and rotates along with the transmission rod. The parts B1 and B2 are provided with threads which are matched with the internal threads of the screw thread 11, the screw thread 11 is provided with strip-shaped bulges which are matched with a sliding groove in the telescopic arm, and the screw thread can move along the axial direction of the transmission rod 10 in the rotating process of the screw rod 10. The thread rotating directions of the parts B1 and B2 are opposite, so that the moving directions of the two screw threads are opposite in the rotating process of the transmission rod 10.
When the transmission rod is rotated to enable the screw thread 11 to move towards the rod end, the clamping pin 12 is gradually jacked up to enable the clamping pin to gradually become a completely opened state, then the screw thread 11 is separated from the thread of the transmission rod 10, the transmission rod continues to rotate, and the screw thread 11 does not move any more; at this point, the drive rod 10 is rotated in the opposite direction, and the thread again engages the thread and moves in the opposite direction, so that the bayonet lock gradually locks until the thread 11 disengages from the thread at the other end of the thread. In order to ensure that the screw thread 11 can be smoothly re-engaged after being disengaged from the thread, two ends of the threaded hole of the screw thread are provided with return springs, so that the screw thread tends to move towards the thread. The latch 12 is required to have a spring and telescopic arm action and to be in a locked state at all times when there is no screw action.
As shown in fig. 11, the latch 12 is in a latched state and can pass when the strap 15 on the telescoping arm is moved towards it.
It should be noted that the thread (drive rod thread) and gear internal thread arrangement should satisfy: the number of rotation of the transmission rod 10 required for the sliding disk 13 to move from one end of the first gear 5 (7) to the other end is slightly larger than the number of rotation of the transmission rod 10 required for the screw thread 11 to move from one end to the other end in a re-meshing manner and to slip off. So that the gear only starts moving after the bayonet is fully opened or closed.
The B mechanism is as shown in figures 8-9, the second gear 7a and the gear rack of the outer telescopic arm act to drive the transmission rod 14 to rotate, the second gear 7a and the transmission rod are fixed, and the rest of the principle is the same as that of the A mechanism.
As shown in fig. 10, a bidirectional mechanical telescopic boom capable of realizing locking at any position, taking the action of the class a transmission locking mechanism mounted on the first telescopic boom 1 and the second telescopic boom 2 as an example to demonstrate the locking principle, the initial state of the mechanical arm is shown in fig. 1 (b), and the initial state of the class a transmission and locking mechanism is shown in fig. 10. The first gear wheel 5 engages a gear belt of the second telescopic arm 2, which is located in the middle of the telescopic arm, in which the screw 11a is in a state of thread disengagement near the rod end, the bayonet 12a is in an open state, the screw 11b is in a state of thread disengagement near the gear wheel, and the bayonet 12a is in a locked state. The movable disc 13 is located close to the end 11b and the gear wheel 7 is in a locked position with respect to the transmission rod 10, allowing the second telescopic arm 2 to move upwards with respect to the arm 1.
In other embodiments of the present disclosure, there are also disclosed:
a method for using a locking mechanism capable of realizing locking at any position comprises the following steps:
the transmission rod is used for forward transmission to drive the sliding piece to move, drive the first connecting piece to move to the locking piece and drive the second connecting piece to be far away from the locking piece, so that the first locking piece is in an opening state, and the second locking piece is in a locking state;
after the first locking piece is opened and the second locking piece is locked, the transmission rod continues to rotate to drive the sliding piece to move to the limiting structure, so that the rotating body is connected with the transmission rod, the transmission rod drives the rotating body to rotate, and the second telescopic arm is driven to move forwards through the matching of the rotating body and the transmission structure;
when the transmission rod moves reversely, the connecting piece moves reversely, the first locking piece is gradually locked, and the second locking piece is gradually opened; slider reverse motion opens the back at first locking piece locking, second locking piece for the rotor is connected with the transfer line, and the transfer line drives the rotor and rotates, drives the flexible arm reverse motion of second through rotor and drive structure cooperation.
Specifically, in the operating state when the second telescopic boom 2 moves downward relative to the first telescopic boom 1 (class a transmission lock mechanism):
the external input power rotates the driving lever 10, so that the movable disk 13 moves toward the screw thread 11 a.
The screw thread 11a moves towards the center of the rod, and the bayonet 12a is gradually locked; the screw thread 11b moves toward the rod end and the bayonet 12b is gradually opened.
After the bayonet 12a is locked and the bayonet 12b is unlocked, the transmission rod 10 continues to rotate, the movable disc moves to the end close to the 11a end in the gear, and the first gear 5 is locked relative to the transmission rod 10.
The transmission rod 10 continues to rotate, which drives the gear 10 to rotate, so that the second telescopic arm 2 moves downwards relative to the first telescopic arm 1 until the end.
After the above state is completed, the working state of the second telescopic arm 2 moving reversely is as follows:
the transmission rod 10 rotates in the reverse direction, the screw thread 11a moves in the reverse direction, the locking pin 12a is gradually opened, and the locking pin 12b is gradually locked.
The moving disk 10 moves in the reverse direction and the gear locks after the detent 12 has moved. The telescopic arm moves reversely.
Fig. 12 shows the principle of locking the class B transmission locking mechanism mounted on the second telescopic boom 2 and the third telescopic boom 3, the power of the locking mechanism is a 7a gear, and the rest of the principle is the same as the class a.
A use method of a bidirectional telescopic arm capable of realizing locking at any position comprises the following steps:
the external power source drives the transmission structure of the first telescopic arm to move in a set direction; in the process of the movement of the transmission structure, the first locking mechanism positioned in the first telescopic arm can lock the bayonet lock corresponding to the movement direction, the bayonet lock in the other movement direction is opened, and the transmission structure of the first telescopic arm is connected with the third telescopic arm in a matched manner, so that the second telescopic arm starts to move;
the second telescopic arm drives the transmission structure of the second telescopic arm to move in the moving process, the bayonet lock in the moving direction corresponding to the transmission locking mechanism on the inner wall of the second telescopic arm is locked, the bayonet lock in the other moving direction is opened, and the transmission structure of the second telescopic arm is connected with the third telescopic arm in a matching manner, so that the third telescopic arm moves. Wherein the movement of the second telescopic arm and the third telescopic arm has certain delay; after the second telescopic arm moves, when the transmission structure of the second telescopic arm is in matched connection with the third telescopic arm, the third telescopic arm can move; make the arm of this application can be used in some work occasions that have the time delay and stretch out and draw back.
Specifically, from the initial state of the telescopic arm shown in fig. 1 (b), the overall operating state is as follows:
(1) The first gear wheel 5 is externally powered, and during the rotation of the first gear wheel, the class a transmission locking mechanism in the first telescopic arm 1 is locked by the bayonet lock corresponding to the movement direction, the bayonet lock in the other movement direction is unlocked, then the first gear wheel 5 is locked, and the second telescopic arm 2 starts to move.
(2) The second gear 7a is driven to move in the moving process of the second telescopic arm 2, the B-type transmission locking mechanism located in the second telescopic arm 2 is locked by the bayonet lock corresponding to the moving direction, the bayonet lock in the other moving direction is opened, then the gear 7B is locked, and the third telescopic arm 3 starts to move.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (7)
1. A locking mechanism capable of realizing locking at any position is characterized by comprising: the device comprises a transmission rod, a sliding part, a connecting part, a rotating body and a locking part; the transmission rod is connected with the rotating body through the sliding part, and the transmission rod and the rotating body are provided with limiting structures for limiting the sliding of the sliding part, so that the rotating rod can drive the rotating body to rotate in a set direction; the connecting piece is rotationally connected with the transmission rod, and a structure matched with the locking piece is arranged on the connecting piece and used for realizing locking or unlocking of the locking piece when the connecting piece is positioned in a set area;
the inner part of the rotating body is provided with a sliding chute matched with the bulge of the sliding part, a set area of the sliding chute is provided with a limiting structure, and the limiting structure adopts limiting discs arranged at two sides of the rotating body;
the connecting piece is of a block structure with a threaded hole, at least one side face of the block structure is a surface with a size gradual change trend, a threaded area is arranged on the transmission rod, the connecting piece is matched with the threaded area of the transmission rod through the threaded hole, a return spring is arranged at the end part of the connecting piece, the return spring is contacted with the spring limiting structure after the connecting piece moves away from the threaded area, the return spring is used for enabling the connecting piece to be always positioned at the edge of the threaded area, and the connecting piece can be rotated to the threaded area again to move in a set direction when the rotating body does reverse movement;
the transmission rod is connected with an external driving mechanism, and the external driving mechanism is a motor; the transmission rod is provided with a strip-shaped bulge, and the sliding piece is provided with a groove matched with the strip-shaped bulge; the transmission rod is provided with a rotating body in the area with the strip-shaped bulges;
the sliding part is of an annular structure, a groove matched with the strip-shaped bulge is formed in the inner circle of the annular structure, and a bulge matched with the rotating body is formed in the outer circle of the annular structure.
2. The locking mechanism of claim 1, wherein the rotator is adapted to be coupled to the mechanism to be locked to drive the mechanism to be locked; when the connecting piece is located in the set area to realize the matching with the locking piece, the reverse driving transmission rod realizes that the locking piece locks the mechanism to be locked.
3. The lock mechanism according to claim 1, wherein the rotating body is provided with a transmission member having a tooth-shaped structure or a chain-shaped structure; the transmission rod is located in the set area and fixedly connected with the rod transmission piece, and a set distance is reserved between the rod transmission piece and the rotating body.
4. A bidirectional telescopic arm capable of realizing locking at any position is characterized by comprising: the device comprises a first telescopic arm, a second telescopic arm, a third telescopic arm, a first locking mechanism and a second locking mechanism; the first locking mechanism adopts a locking mechanism as claimed in any one of claims 1-3; the second locking mechanism comprises the locking mechanism as claimed in any one of claims 1 to 3 and a second gear, and the second gear is fixedly connected with a transmission rod of the locking mechanism; the first telescopic arm is provided with a first locking mechanism and is connected with the second telescopic arm through the first locking mechanism; the second telescopic arm is provided with a second locking mechanism and is connected with the third telescopic arm through the second locking mechanism.
5. The boom of claim 4, wherein a side of the second boom is provided with a driving mechanism and a braking mechanism of the second boom, and a side of the third boom is provided with a driving mechanism and a braking mechanism of the third boom, the braking mechanism is engaged with the locking member, and the driving mechanism is engaged with the rotating body; one side of the first telescopic arm is provided with a transmission structure of the first telescopic arm.
6. The bidirectional telescopic arm of claim 5, wherein one side of the second telescopic arm is provided with a transmission gear bar and two brake straps, and the two brake straps are opposite in rack direction and are respectively positioned on two sides of the transmission gear bar; one side surface of the third telescopic arm is also provided with two transmission gear strips and two braking clamping belts which are respectively positioned at two sides of the transmission gear strips; a set distance is arranged between one of the brake clamping belts and the transmission gear strip to form an accommodating space, and a transmission structure is arranged in the accommodating space between the first brake clamping belt and the transmission gear strip.
7. Use of a bi-directional telescopic arm with any position locking function according to any of claims 4 to 6, comprising:
the external power source drives the transmission structure of the first telescopic arm to move in a set direction; in the process of the movement of the transmission structure, the bayonet lock in the movement direction corresponding to the first locking mechanism in the first telescopic arm is locked, the bayonet lock in the other movement direction is unlocked, and the transmission structure of the first telescopic arm is connected with the third telescopic arm in a matched manner, so that the second telescopic arm starts to move;
the second telescopic arm drives the transmission structure of the second telescopic arm to move in the moving process, the bayonet lock in the moving direction corresponding to the transmission locking mechanism on the inner wall of the second telescopic arm is locked, the bayonet lock in the other moving direction is opened, and the transmission structure of the second telescopic arm is connected with the third telescopic arm in a matching manner, so that the third telescopic arm moves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110076564.3A CN113153872B (en) | 2021-01-20 | 2021-01-20 | Locking mechanism capable of locking at any position, bidirectional mechanical telescopic arm and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110076564.3A CN113153872B (en) | 2021-01-20 | 2021-01-20 | Locking mechanism capable of locking at any position, bidirectional mechanical telescopic arm and method |
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| Publication Number | Publication Date |
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| CN113153872A CN113153872A (en) | 2021-07-23 |
| CN113153872B true CN113153872B (en) | 2023-02-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3856422A (en) * | 1973-05-29 | 1974-12-24 | W Trefry | Retention clip for ball and socket joint |
| CN102287429B (en) * | 2010-06-21 | 2012-11-07 | 朱建彬 | Bi-layer telescopic flexible guide rail system |
| CN103511414B (en) * | 2012-06-15 | 2015-09-30 | 黄汉卿 | The ejector of flexible rod |
| EP3318158A1 (en) * | 2016-11-07 | 2018-05-09 | Samsonite IP Holdings S.à.r.l. | Extendable tow handle for a luggage article |
| CN110594251A (en) * | 2019-08-02 | 2019-12-20 | 浙江捷昌线性驱动科技股份有限公司 | Four-section lifting stand column |
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