Sample rack hook-out device for analytical instruments

Abstract

The present invention discloses a sample rack hooking device for an analytical instrument, comprising a synchronous belt arranged on a frame in the longitudinal direction and driven by a motor, a first guide rail and a hook hand motion track guide plate arranged on the frame parallel to the synchronous belt at intervals; a hook hand telescopic device is connected to the synchronous belt, and the hook hand telescopic device is used to drive the hook hand to reciprocate along the outer edge of the hook hand motion track guide plate; a hook hand motion track limiting device is arranged on the hook hand motion track guide plate, and the hook hand motion track limiting device is used to limit the end position of the hook hand's return movement. The advantage of the present invention is that the roller on the second slider of the hook hand moves in a circular manner along the edge of the hook hand motion track guide plate, realizing the extension and retraction of the hook hand as a whole driven by a motor, so as to automatically pull the sample rack to a certain position, avoid the collision force between the hook head and the object being conveyed, prolong the service life of the hook hand, and make the working performance of the sample rack hooking device more stable and reliable.

Description

Technical Field

[0001] The invention relates to laboratory chemical analysis instruments, assembly line instruments and the like, and in particular to a hooking-out device of a sample carrying device of the instrument. Background Art

[0002] The present invention is a further improvement of the Chinese patent application No. 201620036661.4 and the invention name "lateral push reciprocating feeding mechanism of test tube sample rack". The lateral push reciprocating feeding mechanism of the test tube sample rack is composed of a test tube sample rack, a main fixed frame, an upper linear slide rail, a lower linear slide rail, an upper movable bracket, a lower movable bracket, two test tube rack push claws and a spring telescopic rod; the upper and lower linear slide rails are horizontally fixed on the main fixed frame and are located below the sample rack platform, the upper movable bracket is fixed on the sliding member on the upper linear slide rail, the lower movable bracket is fixed on the sliding member on the lower linear slide rail, the upper movable bracket is provided with two rotating shafts, the test tube rack push claw button is connected to the rotating shaft, the lower movable bracket is provided with two pins, and the test tube rack push claw is attached to the pins to swing. The disadvantage is that the push claw rotates around the pins and needs to collide with the object to be transmitted to rotate under force. After a period of use, the rotating shaft is worn and rotates unsmoothly due to the collision and force of the push claw, and the push claw is deformed, resulting in the push claw being unable to rotate to the set position and causing a malfunction. Moreover, since the claw is hooked from the bottom of the sample rack, it cannot be docked with the conveying track of the next process. At the same time, the structure is relatively complex, resulting in high manufacturing and maintenance costs. Summary of the invention

[0003] The purpose of the present invention is to provide a sample rack hooking device for an analytical instrument, which uses the circular motion of the hooking mechanism to realize the automatic pulling of the sample rack to a certain position, has a simple structure and low cost, and at the same time avoids the collision and stress of the conveyed object, has a longer service life, and has more stable and reliable performance; and adopts a modular design, which greatly reduces the manufacturing and maintenance costs.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The sample rack hooking device for an analytical instrument described in the present invention comprises a synchronous belt driven by a motor and arranged on a frame in the longitudinal direction, a first guide rail and a hook hand motion trajectory guide plate are arranged on the frame parallel to the synchronous belt and at intervals; a hook hand telescopic device is connected to the synchronous belt, and the hook hand telescopic device is used to drive the hook hand to reciprocate along the outer edge of the hook hand motion trajectory guide plate; a hook hand motion trajectory limiting device is arranged on the hook hand motion trajectory guide plate, and the hook hand motion trajectory limiting device is used to limit the end position of the hook hand's return movement.

[0006] Preferably, the hook extension and retraction device includes: a first slider slidably arranged on the first guide rail, a second guide rail transversely arranged on the first slider, a second slider slidably arranged on the second guide rail, and the second slider is connected to the first slider through a return spring; the second slider is provided with a roller that rolls along the edge of the guide plate of the hook movement trajectory, and the second slider is provided with a hook in the longitudinal direction, and the hook consists of a hook arm and a hook head.

[0007] Preferably, the hook motion trajectory limiting device is composed of an elastic rotating block arranged on the hook motion trajectory guide plate at the starting end of the first slider, and a fixed block arranged on the frame and connected with the elastic rotating block.

[0008] Preferably, the connecting surface between the elastic rotating stopper and the fixed stopper is an inclined surface.

[0009] Preferably, the horizontal edge of the hook motion trajectory guide plate located at the return end of the first slider is a beveled edge.

[0010] The advantage of the present invention is that the hook moves in a circular motion along the edge of the hook motion track guide plate through the roller on the second slider, and a motor drives the hook to extend and retract as a whole, so as to automatically pull the sample rack to a certain position, avoid the collision between the hook head and the object being transported, extend the service life of the hook, and make the working performance of the sample rack hooking device more stable and reliable. At the same time, the sample rack hooking device has a modular design, simple structure, low manufacturing cost, and convenient component replacement and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention.

[0012] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part I.

[0013] Figure 3 yes Figure 1 Schematic diagram of the rear view structure.

[0014] Figure 4 yes Figure 1 Schematic diagram of the top view structure. DETAILED DESCRIPTION

[0015] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0016] like Figure 1-4As shown, the sample rack hooking device for analytical instruments of the present invention comprises a synchronous belt 3 arranged longitudinally on a frame 1 and driven by a motor 2, a first guide rail 4 and a hook hand motion track guide plate 5 arranged at intervals above the frame 1 and parallel to the motion direction of the synchronous belt 3. A hook hand telescopic device for driving the hook hand to reciprocate along the outer edge of the hook hand motion track guide plate 5 is fixed on the synchronous belt 3, and a hook hand motion track limiting device is arranged on the hook hand motion track guide plate 5; the hook hand motion track limiting device is used to limit the end position of the hook hand return motion.

[0017] like Figure 1-4 As shown, the hook extension and retraction device includes: a first slider 6 slidably arranged on the first guide rail 4, the first slider 6 is connected to the synchronous belt 3 through a pressure block 7 and a slider mounting plate 8; the slider mounting plate 8 is an inverted L-shaped structure, and a second guide rail 9 is fixed on its cross plate, and a second slider 10 is slidably arranged on the second guide rail 9, and the second slider 10 is elastically connected to the slider mounting plate 8 through a return spring 11; the second slider 10 is provided with a roller 12 that rolls along the edge of the guide plate 5 along the hook movement trajectory, and a hook is provided on the second slider 10 in the longitudinal direction, and the hook is composed of a hook arm 13 and a hook head 14.

[0018] The hook motion track limiting device is composed of an elastic rotating block arranged on the hook motion track guide plate 5 at the starting end of the first slider 6, and a fixed block 15 arranged on the frame 1 and connected with the elastic rotating block. The elastic rotating block is composed of a movable block 16 and a tension spring 17 connected between the movable block 16 and the hook motion track guide plate 5. The movable block 16 is hinged to the hook motion track guide plate 5 through an axle pin 18. The connecting surface of the fixed block 15 and the movable block 16 is set to an inclined surface, and the horizontal edge of the hook motion track guide plate 5 located at the return end of the first slider 6 is set to an inclined edge, so that it is convenient for the roller 12 on the second slider 10 to roll and reverse along the edge of the hook motion track guide plate 5.

[0019] like Figure 1 , 4As shown, when the present invention is working, when the analytical instrument has a sample rack that needs to be sampled, the motor 2 rotates forward to drive the synchronous belt 3 to drive the hook hand to move rightward along the outer edge of the hook hand motion track guide plate 5. During the rightward movement, the roller 12 on the slider mounting plate 8 moves closely to the outer straight edge of the hook hand motion track guide plate 5 under the pulling force of the return spring 11; after moving to the preset position for hooking the sample rack, the roller 12 transitions along the outer edge of the beveled edge at the end of the hook hand motion track guide plate 5 to the other straight edge of the hook hand motion track guide plate 5, so that the hook head 14 extends Then the motor 2 rotates in the reverse direction to drive the roller 12 on the slider mounting plate 8 to return along the other straight edge of the guide plate 5 on the hook movement trajectory. When it returns to the preset position, the roller 12 moves along the connecting inclined surface of the fixed stopper 15 and the movable stopper 16 and pushes the movable stopper 16 to return to the initial position. When the roller 12 is separated from the movable stopper 16, the movable stopper 16 returns to the initial position under the action of the tension spring 17. In this way, the reciprocating operation realizes the extension and retraction movement of the hook, thereby realizing the transmission of the sample rack.

[0020] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In addition, in the invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A sample rack hooking device for an analytical instrument, characterized in that: It comprises a synchronous belt which is arranged on a frame in the longitudinal direction and driven by a motor, and a first guide rail and a hook hand motion track guide plate which are arranged on the frame in parallel with the synchronous belt and at intervals; a hook hand telescopic device is connected to the synchronous belt, and the hook hand telescopic device is used to drive the hook hand to reciprocate along the outer edge of the hook hand motion track guide plate; a hook hand motion track limiting device is arranged on the hook hand motion track guide plate, and the hook hand motion track limiting device is used to limit the end position of the hook hand return movement; The hook extension device comprises: a first slider slidably arranged on the first guide rail, a second guide rail transversely arranged on the first slider, a second slider slidably arranged on the second guide rail, the second slider being connected to the first slider via a return spring; a roller rolling along the edge of the guide plate of the hook movement track is arranged on the second slider, a hook is longitudinally arranged on the second slider, and the hook consists of a hook arm and a hook head; The hook motion trajectory limiting device is composed of an elastic rotating block arranged on the hook motion trajectory guide plate at the starting end of the first slider, and a fixed block arranged on the frame and connected with the elastic rotating block. The elastic rotating block is composed of a movable block and a tension spring connected between the movable block and the hook motion trajectory guide plate. The movable block is hinged to the hook motion trajectory guide plate through an axle pin; the horizontal edge of the hook motion trajectory guide plate located at the return end of the first slider is a bevel.

2. The sample rack extraction device for an analytical instrument according to claim 1, characterized in that: The connecting surface between the elastic rotating stopper and the fixed stopper is an inclined surface.

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