CN212321645U - Parallel push-back mechanism and sample conveying device - Google Patents

Abstract

The utility model relates to a technical field that the sample frame was carried provides a parallel mechanism and sample conveyor that pushes back, and wherein parallel mechanism that pushes back includes the support, is provided with the motor on the support and pushes back the subassembly, and it includes initiative push rod and driven push rod to push back the subassembly, and the initiative push rod receives the drive of motor and rotates, and driven push rod receives the drive of initiative push rod and for initiative push rod antiport. Driven push rod and initiative push rod rotate in opposite directions and can promote the sample frame and make sample frame remain parallel translation throughout, will the utility model discloses a parallel return pushes away the mechanism and is applied to among the sample conveyor, can avoid the sample frame to take place the slope in the removal and lead to entering new track smoothly, and this scheme is simple easily realizes.

Description

Parallel push-back mechanism and sample conveying device

Technical Field

The utility model relates to a technical field that the sample frame was carried more exactly relates to a parallel mechanism and sample conveyor that push back.

Background

The sample conveying device applied to the assembly line of blood analysis and the like comprises a sample frame push-back mechanism, wherein the sample frame push-back mechanism is used for pushing back a sample frame, so that the detected sample frame exits from a detection module and smoothly enters a recovery module or the sample frame which is conveniently inserted into an emergency sample. Many of the push-back mechanisms on the market at present are unilateral push mechanisms, and can only push the sample rack on one side of the sample rack, and the sample rack is often inclined when being pushed by the push-back mechanisms.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a parallel mechanism that pushes back, can parallel promotion sample frame, make the sample frame in the utility model discloses a parallel mechanism that pushes back promotes the in-process and remains parallel translation throughout.

The technical solution of the utility model is that, a parallel mechanism of pushing back is provided, including the support, be provided with the motor on the support and push back the subassembly, push back the subassembly and include initiative push rod and driven push rod, the initiative push rod receives the drive of motor and rotates, driven push rod receives the drive of initiative push rod and for initiative push rod antiport.

Compared with the prior art, the utility model discloses a parallel mechanism that pushes back has following advantage: the driven push rod and the driving push rod rotate oppositely to push the sample frame and enable the sample frame to keep parallel movement all the time, the sample frame is prevented from inclining in the movement process to cause that the sample frame cannot smoothly enter a new track, and the scheme is simple and easy to realize.

Preferably, the driving push rod and the driven push rod are both provided with a section of arc curved surface, and the arc curved surfaces of the driving push rod and the driven push rod are always mutually butted. By adopting the structure, the driving push rod can drive the driven push rod to rotate reversely relatively through the friction force generated by mutual interference between the arc curved surface of the driving push rod and the arc curved surface of the driven push rod.

Preferably, the arc-shaped curved surface of the driving push rod and the arc-shaped curved surface of the driven push rod are respectively and correspondingly provided with tooth surfaces which are meshed with each other. By adopting the structure, the driving push rod is meshed with the driven push rod through the tooth surface to transmit, and the rotating angle of the driven push rod is reliably and accurately controlled.

Preferably, a limiting part is arranged on the arc curved surface of the driving push rod, and the limiting part is used for preventing the driving push rod from driving the driven push rod to rotate. With this structure, the driving push rod can define the position at which the driven push rod stops rotating.

Preferably, the limiting member limits a maximum angle of the driving push rod and the driven push rod to rotate towards each other. By adopting the structure, the maximum angle of the opposite rotation of the driving push rod and the driven push rod is limited, namely, the maximum distance of the driving push rod and the driven push rod for pushing the sample rack to slide is limited.

Preferably, the support is further provided with an optical coupler, the driving push rod or the driven push rod is provided with a photoelectric separation blade, and the optical coupler detects the rotation angle of the driving push rod or the driven push rod by sensing the position of the photoelectric separation blade. By adopting the structure, the optical coupler senses the position of the photoelectric separation blade and can acquire the rotating position of the driving push rod or the driven push rod.

Preferably, the optical coupler detects the maximum angle of the back rotation of the driving push rod and the driven push rod by sensing the position of the photoelectric barrier sheet. By adopting the structure, the optocoupler can detect whether the driving push rod and the driven push rod complete resetting or not through sensing the position of the photoelectric separation blade, and whether the optocoupler is in a waiting state or not.

Preferably, the driven push rod is connected to the bracket and driven by the driven push rod to rotate around a connecting point on the bracket.

The to-be-solved technical problem of the utility model is to provide a sample conveyor, can parallel promotion sample frame, make sample frame remain parallel translation throughout.

The technical solution of the utility model is that, a sample conveyor is provided, including foretell parallel return push mechanism, sample frame and sample frame guide rail, sample frame receive in the parallel return push mechanism initiative push rod and driven push rod's promotion and slide along the sample frame guide rail.

Compared with the prior art, the utility model discloses a parallel mechanism that pushes back has following advantage: the driven push rod and the driving push rod in the parallel push-back mechanism rotate oppositely to push the sample frame and enable the sample frame to keep parallel movement all the time, the sample frame is prevented from inclining in the movement process to cause that the sample frame cannot smoothly enter a new track, and the scheme is simple and easy to realize.

Preferably, the controller is further included, the motor is a stepping motor, and the controller is used for controlling the forward or reverse steps of the stepping motor. By adopting the structure, the rotation of the driven push rod and the driving push rod can be accurately controlled.

Drawings

Fig. 1 is a schematic structural diagram of the parallel push-back mechanism of the present invention in a waiting state.

Fig. 2 is a schematic structural view of the parallel pushing mechanism of the present invention when pushing back the sample rack.

Fig. 3 is a schematic structural diagram of the parallel pushing mechanism of the present invention applied to the sample rack conveying device.

As shown in the figure: 1. the device comprises a driving push rod, 1-1 parts of a main rod fluted disc, 1-2 parts of a main rod fluted disc, a photoelectric blocking piece, 1-3 parts of a main transmission gear, 1-4 parts of a main limiting part, 2 parts of a driven push rod, 2-1 parts of a driven rod fluted disc, 2-2 parts of a driven transmission gear, 2-3 parts of a driven limiting part, 3 parts of a support, 4 parts of a stepping motor, 5 parts of a groove-shaped optical coupler, 6 parts of a sample frame.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Further, when a statement such as "… at least one" appears after the list of listed features, the entire listed feature is modified rather than modifying individual elements in the list.

As shown in fig. 1 and fig. 2, the parallel push-back mechanism of the present invention comprises a support 3, a stepping motor 4 and a push-back member are disposed on the support 3, the push-back member comprises a driving push rod 1 and a driven push rod 2 having the same length, the driving push rod 1 is provided with a main rod fluted disc 1-1, the main rod fluted disc 1-1 is connected to an output shaft of the stepping motor 4, a plurality of driving teeth 1-3 are disposed on a circumferential surface of the main rod fluted disc 1-1, the driven push rod 2 is provided with a driven rod fluted disc 2-1, a plurality of driven teeth 2-2 are disposed on a circumferential surface of the driven rod fluted disc 2-1, the driving teeth 1-3 are engaged with the driven teeth 2-2, and a main limit member 1-4 and a driven limit member 2-3 are disposed on circumferential surfaces of the main rod fluted disc 1-1 and the driven rod fluted disc 2-1, the main limiting part 1-4 is adjacent to the endmost main transmission gear 1-3, the auxiliary limiting part 2-3 is adjacent to the endmost auxiliary transmission gear 2-2, the size of the main rod fluted disc 1-1 is equal to that of the auxiliary rod fluted disc 2-1, a groove-shaped optical coupler 5 is further arranged on one side, located on the main rod fluted disc 1-1, of the support 3, photoelectric blocking pieces 1-2 are arranged on the circumferential surface of the main rod fluted disc 1-1, and the photoelectric blocking pieces 1-2 can pass through a positioning groove of the groove-shaped optical coupler 5 in the process of rotating along with the main rod fluted disc 1-1.

Will the utility model discloses an use in sample frame conveyor as shown in figure 3 parallel back to push away the mechanism, parallel back to push away the working process that the mechanism promoted sample frame 6 as follows:

initially, the parallel pushing-back mechanism is in a waiting state as shown in fig. 1, the stepping motor 4 drives the main rod fluted disc 1-1 to rotate clockwise, and the main transmission teeth 1-3 on the main rod fluted disc 1-1 are meshed with and transmit the auxiliary transmission teeth 2-2 on the auxiliary rod fluted disc 2-1, so that the auxiliary rod fluted disc 2-1 rotates anticlockwise, and thus the driving push rod 1 and the driven push rod 2 rotate oppositely at a constant speed, and the heads of the driving push rod 1 and the driven push rod 2 are respectively contacted with the sample rack, so as to push the sample rack 6 to move in parallel; until the main transmission gear 1-3 is separated from the secondary transmission gear 2-2 and the main limiting member 1-4 is in contact with the secondary limiting member 2-3, as shown in fig. 2, the stepping motor 4 stops driving the main rod toothed disc 1-1 to rotate, the mechanical limiting action of the main limiting member 1-4 on the secondary limiting member 2-3 causes the secondary rod toothed disc 2-1 to stop rotating at the same time, and the sample rack is pushed to a specific position.

After the task of pushing the sample rack is completed, the parallel pushing mechanism returns to the waiting state shown in fig. 1, the stepping motor 4 drives the main rod fluted disc 1-1 to rotate anticlockwise, the main transmission gear 1-3 is in meshing transmission with the auxiliary transmission gear 2-2, and the auxiliary rod fluted disc 2-1 rotates clockwise, so that the driving push rod 1 and the driven push rod 2 rotate backwards at constant speed until the photoelectric blocking piece 1-2 enters the positioning groove of the groove type optical coupler 5, as shown in fig. 1, the stepping motor 4 stops driving the main rod fluted disc 1-1 to rotate at the moment, and the parallel pushing mechanism returns to the waiting state to wait for pushing the next sample rack.

In the process of pushing the sample rack by the parallel push-back mechanism and the process of returning to a waiting state, the stepping motor 4 records the stepping number, so that the operation is stopped timely when the main limiting part 1-4 is in contact with the auxiliary limiting part 2-3 and the photoelectric retaining sheet 1-2 enters the positioning groove of the groove-shaped optical coupler 5, and the equipment is prevented from being damaged.

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is within the spirit and scope of the present invention.

Claims (10)

1. The parallel push-back mechanism is characterized by comprising a support, wherein a motor and a push-back assembly are arranged on the support, the push-back assembly comprises a driving push rod and a driven push rod, the driving push rod is driven by the motor to rotate, and the driven push rod is driven by the driving push rod to rotate reversely relative to the driving push rod.

2. The parallel push-back mechanism according to claim 1, wherein the driving push rod and the driven push rod are provided with a curved arc surface, and the curved arc surface of the driving push rod and the curved arc surface of the driven push rod are always in collision with each other.

3. The parallel push-back mechanism according to claim 2, wherein the curved surface of the driving rod and the curved surface of the driven rod are respectively provided with a tooth surface engaged with each other.

4. The parallel push-back mechanism according to claim 2, wherein a limiting member is disposed on the circular arc surface of the driving rod, and the limiting member is used to prevent the driving rod from driving the driven rod to rotate.

5. The parallel thrust back mechanism of claim 4, wherein the limiting member defines a maximum angle at which the driving rod and the driven rod rotate toward each other.

6. The parallel push-back mechanism according to claim 1, wherein the bracket is further provided with an optical coupler, the driving push rod or the driven push rod is provided with a photoelectric barrier, and the optical coupler detects the rotation angle of the driving push rod or the driven push rod by sensing the position of the photoelectric barrier.

7. The parallel push-back mechanism according to claim 6, wherein the optical coupler detects the maximum angle of the back rotation of the driving push rod and the driven push rod by sensing the position of the photoelectric barrier.

8. The parallel thrust return mechanism of claim 1, wherein the driven push rod is connected to the frame and is driven by the driven push rod to rotate about a connection point on the frame.

9. A sample transport apparatus comprising the parallel pushing-back mechanism according to any one of claims 1 to 8, a sample rack and a sample rack guide rail, wherein the sample rack is pushed by the driving push rod and the driven push rod of the parallel pushing-back mechanism to slide along the sample rack guide rail.

10. The specimen transport device of claim 9, further comprising a controller, wherein the motor is a stepper motor, and wherein the controller is configured to control the number of steps the stepper motor is driven in forward or reverse.

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