Clamping device and analyzer

Abstract

The utility model discloses a clamping device and an analyzer, and relates to the technical field of clamping. The clamping device comprises a frame body, a driving assembly and a plurality of clamping assemblies; the driving assembly is installed on the frame body and comprises a driving part, a lead screw and a transmission part, the output end of the driving part is connected to the lead screw and used for driving the lead screw to rotate, and the lead screw is sleeved with the transmission part which is in threaded connection with the lead screw; the clamping assemblies are connected to the transmission part in the circumferential direction of the transmission part and connected with the frame so that the transmission part can move relative to the lead screw when the lead screw rotates, each clamping assembly comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is rotationally connected to the transmission part, the other end of the first connecting rod is rotationally connected to the second connecting rod, and the second connecting rod is further rotationally connected with the frame. The clamping device solves the technical problem that an existing clamping device is prone to failure due to the fact that elastic pieces such as a tension spring are adopted.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping, in particular to a clamping device and an analyzer. Background Art

[0002] A clamping device is a device that cooperates with other devices to perform actions such as transferring and opening the cover by clamping an object, and is widely used in various instruments. For example, in medical instruments, a clamping device needs to be set for transferring reaction cups, sample tubes, or opening the covers of sample tubes. Existing clamping devices usually use a tension spring to achieve this. The clamping jaws are opened by driving a cam to rotate through a stepping motor, and after the cam resets, the clamping jaws are reset under the action of the tension spring. However, due to the short service life of the tension spring, the clamping device is prone to failure. Summary of the Utility Model

[0003] In view of this, the utility model provides a clamping device and an analyzer to solve the technical problem that the existing clamping device is prone to failure.

[0004] To solve the above technical problem, the first technical solution adopted by the utility model is as follows:

[0005] A clamping device, the clamping device includes:

[0006] A frame body;

[0007] A driving assembly, installed on the frame body, the driving assembly includes a driving member, a lead screw, and a transmission member. The output end of the driving member is connected to the lead screw and is used to drive the lead screw to rotate. The transmission member is sleeved on the lead screw and is threadedly connected to the lead screw;

[0008] And a plurality of clamping assemblies, each of the clamping assemblies is circumferentially connected to the transmission member along the transmission member and is connected to the frame body, so as to enable the transmission member to move relative to the lead screw when the lead screw rotates. Each of the clamping assemblies includes a first connecting rod and a second connecting rod. One end of the first connecting rod is rotatably connected to the transmission member, and the other end is rotatably connected to the second connecting rod. The second connecting rod is also rotatably connected to the frame body.

[0009] In some embodiments of the clamping device, the rotation connection point between the second connecting rod and the frame body is provided at the middle of the second connecting rod.

[0010] In some embodiments of the clamping device, the second connecting rod includes a first section and a second section. One end of the first section is rotatably connected to the first connecting rod, and the other end is fixedly connected to the second section. The first section and the second section are arranged at an angle;

[0011] The connection point between the first section and the second section is the rotation connection point between the second connecting rod and the frame body.

[0012] In some embodiments of the clamping device, the number of the clamping assemblies is two, and the angles between the two first sections and the second sections are arranged opposite to or opposite to each other.

[0013] In some embodiments of the clamping device, the drive assembly further includes a torque limiter, the drive member is connected to the screw via the torque limiter, and the torque limiter is capable of causing the drive member to idle when the torque of the drive member is greater than a limit of the torque limiter.

[0014] In some embodiments of the clamping device, the clamping device also includes a plurality of mounting seats, each of which is mounted on the transmission member and is used to be rotatably connected to each of the first connecting rods in a one-to-one correspondence; each of the mounting seats has an opening so that the end of the first connecting rod can extend into and be rotatably connected to the inner wall of the opening.

[0015] In some embodiments of the clamping device, a limiting wall is further provided on the mounting seat, and the limiting wall is located on the rotation path of the first connecting rod so as to limit the rotation angle of the first connecting rod.

[0016] In some embodiments of the clamping device, the frame body includes a mounting plate, a first side plate and a second side plate, the first side plate and the second side plate are both connected to one side of the mounting plate and are spaced apart, the mounting plate, the first side plate and the second side plate are enclosed to form a receiving space, the mounting plate is provided with a through hole penetrating the mounting plate, and the through hole is connected to the receiving space;

[0017] The driving member is installed on a side of the mounting plate away from the first side plate, the output end of the driving member extends into the receiving space through the through hole, the screw rod, the transmission member and the first connecting rod are received in the receiving space, and the second connecting rod partially extends out of the receiving space.

[0018] In some embodiments of the clamping device, the frame further includes a plurality of support members, one end of each of the support members is connected to the first side plate, and the other end is connected to the second side plate, and each of the second connecting rods is provided with a hole so that it can be mounted one by one on the support member and thus can rotate relative to the frame.

[0019] In order to solve the above technical problems, the second technical solution adopted by the utility model is:

[0020] An analyzer comprises the clamping device described in the above embodiment.

[0021] Implementing the embodiments of the present utility model will have at least the following beneficial effects:

[0022] The above-mentioned clamping device is applied to the analyzer, which can make itself and the analyzer have the technical effect of clamping objects that are not easy to fail. Specifically, the clamping assembly in the clamping device of the utility model adopts a connecting rod combination structure. In the process of the driving member driving the lead screw to rotate forward and reverse, the transmission member is connected and restricted by the clamping assembly, so that the transmission member can be tightened or unscrewed on the lead screw, thereby driving the connecting rod to move, and the second connecting rod is rotatably connected to the frame. In this way, in the process of the transmission member driving the overall connecting rod to move, multiple second connecting rods can form a closed and unfolded state to clamp objects. No tension spring is used, so the problem of failure is not easy to occur, thereby solving the technical problem that the existing clamping device is prone to failure due to the use of elastic members such as tension springs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a schematic structural diagram of a clamping device in one embodiment;

[0025] Figure 2 for Figure 1 A front view of the clamping device in an expanded state;

[0026] Figure 3 FIG. 1 is a partial structural diagram of a clamping device in an embodiment.

[0027] Among them: 1. frame; 11. mounting plate; 12. first side plate; 13. second side plate; 14. support member; 2. drive assembly; 21. drive member; 22. screw rod; 23. transmission member; 24. torque limiter; 3. clamping assembly; 31. first connecting rod; 32. second connecting rod; 321. first section; 322. second section; 4. mounting seat; 41. limiting wall. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used herein in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] As Figures 1-3 shown, in an embodiment of a clamping device, the clamping device includes a frame body 1, a driving assembly 2 and a plurality of clamping assemblies 3. The driving assembly 2 is installed on the frame body 1. The driving assembly 2 includes a driving member 21, a lead screw 22 and a transmission member 23. The output end of the driving member 21 is connected to the lead screw 22 and is used to drive the lead screw 22 to rotate. The transmission member 23 is sleeved on the lead screw 22 and is threadedly connected to the lead screw 22. Each clamping assembly 3 is circumferentially connected to the transmission member 23 and is connected to the frame body 1, so as to be able to move the transmission member 23 relative to the lead screw 22 when the lead screw 22 rotates. Each clamping assembly 3 includes a first connecting rod 31 and a second connecting rod 32. One end of the first connecting rod 31 is rotatably connected to the transmission member 23, and the other end is rotatably connected to the second connecting rod 32. The second connecting rod 32 is also rotatably connected to the frame body 1.

[0032] In this embodiment, the clamping assembly 3 in the clamping device adopts a connecting rod combination structure. During the process of the driving member 21 driving the lead screw 22 to rotate forward and backward, due to the connection and restriction effect of the transmission member 23 through the clamping assembly 3, the transmission member 23 can be screwed tight or unscrewed on the lead screw 22, thereby being able to drive the connecting rod to act. And the second connecting rod 32 is rotatably connected to the frame body 1. Thus, during the process of the transmission member 23 driving the overall connecting rod to move, a plurality of second connecting rods 32 can form a closed and unfolded state to clamp an object. No tension spring is used, so it is not easy to have a failure problem, thereby solving the technical problem that the existing clamping device is prone to failure due to the use of elastic members such as tension springs.

[0033] It should be noted that when the lead screw 22 rotates, its position remains unchanged, and the movement of the transmission member 23 relative to the lead screw 22 is to be screwed tight or unscrewed.

[0034] Specifically, the driving member 21 can be a stepper motor, which is used to provide the power for the rotation of the lead screw 22.

[0035] In an embodiment of the clamping device, the rotational connection between the second link 32 and the frame 1 is provided at the middle of the second link 32.

[0036] In this embodiment, by setting the rotational connection at the middle of the second link 32, thus dividing from the middle of the second link 32, the end away from the first link 31 can be used to clamp an object.

[0037] In an embodiment of the clamping device, the second link 32 includes a first section 321 and a second section 322. One end of the first section 321 is rotatably connected to the first link 31, and the other end is fixedly connected to the second section 322. The first section 321 and the second section 322 are arranged at an angle. The connection between the first section 321 and the second section 322 is the rotational connection between the second link 32 and the frame 1.

[0038] In this embodiment, specifically, the shape of the second link 32 can be a V-shape or an L-shape, etc., and the rotation point is set at the connection between the first section 321 and the second section 322. Taking the axial direction of the lead screw 22 as the vertical direction as an example, by setting the shape of the second link 32 to be bent, compared with when the second link 32 is an integral straight rod, it can be avoided that the connection between the first link 31 and the first section 321 is vertically opposite to the connection between the first link 31 and the transmission member 23, and a vertically upward and downward force will be generated when they are vertically opposite, which is not conducive to rotation. In this embodiment, by setting the second link 32 to have a fold angle, it can be misaligned in this way, so that when the first link 31 pulls and pushes the second link 32, the pulling and pushing force forms a certain angle with the vertical direction, thus facilitating the expansion and closing.

[0039] In an embodiment of the clamping device, the number of the clamping assemblies 3 is two, and the angles between the two first sections 321 and the second sections 322 are set relatively or oppositely.

[0040] In this embodiment, when the number of the clamping assemblies 3 is two, the angles on the two second links 32 are opposite. When the number of the clamping assemblies 3 is multiple, they are arranged in a circumferential ring, and can also be arranged in a regular polygon.

[0041] In an embodiment of the clamping device, the drive assembly 2 further includes a torque limiter 24. The drive member 21 is connected to the lead screw 22 through the torque limiter 24, and the torque limiter 24 can make the drive member 21 idle when the torque of the drive member 21 is greater than the limit of the torque limiter 24.

[0042] In this embodiment, when the torque of the driving member 21 is less than the limit of the torque limiter 24, the torque limiter 24 drives the lead screw 22 to rotate together with the driving member 21, thereby driving the transmission member 23 to move. When the torque of the driving member 21 is greater than the limit of the torque limiter 24, the torque limiter 24 disconnects, and the driving member 21 idles. At this time, the lead screw 22 does not rotate following the motor, which can effectively prevent the driving member 21 from losing steps.

[0043] It can be understood that by setting the torque limiter 24, the magnitude of the clamping force can be better restricted. Specifically, by adjusting the limit value of the torque limiter 24, the magnitude of the torque of the driving member 21 can be transmitted to the lead screw 22, and then transmitted to the second link 32 through the transmission member 23.

[0044] In an embodiment of the clamping device, the clamping device further includes a plurality of mounting seats 4. Each mounting seat 4 is mounted on the transmission member 23 and is used to rotatably connect to each first link 31 in one-to-one correspondence. Each mounting seat 4 has an opening to allow the end of the first link 31 to extend into and rotatably connect to the inner wall of the opening.

[0045] In this embodiment, specifically, the mounting seat 4 can be of a U-shaped structure, which can form an opening. The side walls of the U-shaped opening can not only provide the installation of the rotating shaft for the first link 31, but also play the role of restricting and guiding the rotation of the first link 31, avoiding the deflection of the first link 31.

[0046] In an embodiment of the clamping device, a limiting wall 41 is further provided on the mounting seat 4. The limiting wall 41 is located on the rotation path of the first link 31 to be able to limit the rotation angle of the first link 31.

[0047] Combined with the previous embodiment, the U-shaped mounting seat 4 has two opposite side walls, while the limiting wall 41 in this embodiment adds one more side wall to form three side walls, and this limiting wall 41 is located on the rotation path of the first link 31. In this way, the rotation of the first link 31 can be restricted, and when the first link 31 abuts against the limiting wall 41, it will not rotate further. The further pulling and pushing forces of the transmission member 23 will all directly act on the second link 32, thereby improving the clamping effect.

[0048] In an embodiment of a clamping device, the frame 1 includes a mounting plate 11, a first side plate 12, and a second side plate 13. The first side plate 12 and the second side plate 13 are both connected to one side of the mounting plate 11 and are spaced apart. The mounting plate 11, the first side plate 12, and the second side plate 13 enclose a receiving space, and a through hole penetrating the mounting plate 11 is provided on the mounting plate, and the through hole communicates with the receiving space. The driving member 21 is installed on the side of the mounting plate 11 facing away from the first side plate 12, and the output end of the driving member 21 passes through the through hole and extends into the receiving space. The lead screw 22, the transmission member 23, and the first connecting rod 31 are received in the receiving space, and the second connecting rod 32 partially extends out of the receiving space.

[0049] In this embodiment, specifically, the mounting plate, the first side plate 12, and the second side plate 13 form a U-shaped structure. By setting the frame 1 as a U-shaped structure, structures such as the lead screw 22 can be received, which can play a protective role.

[0050] Furthermore, a bottom plate and two side plates can be further provided to form a rectangular box structure, which can better protect the internal structure and avoid external interference.

[0051] In an embodiment of a clamping device, the frame 1 further includes a plurality of support members 14. One end of each support member 14 is connected to the first side plate 12, and the other end is connected to the second side plate 13. A hole is provided on each second connecting rod 32 so that it can be sleeved on the support member 14 in a one-to-one correspondence, and thus can rotate relative to the frame 1.

[0052] In this embodiment, specifically, the support member 14 can be a shaft-like structural member. By providing the support member 14, it can not only support the second connecting rod 32 but also act as a rotating shaft.

[0053] The present utility model also relates to an analyzer, including the clamping device in the previous embodiment.

[0054] Specifically, it can be understood that the analyzer includes multiple devices, such as a mobile device and an open-lid device. These devices can all adopt the clamping device. When the clamping device is applied to the mobile device, it can be combined with a driving device. When the clamping device clamps objects such as test tubes and reaction cups, the driving device transports the clamping device and the objects away at the same time. When the clamping device is applied to the open-lid device, it can be combined with a clamping device and a driving device. The clamping device clamps the test tube, and the driving device drives the clamping device to approach or move away from the test tube, and the clamping device is responsible for clamping the tube cap on the test tube, thereby realizing opening the lid. Further, the difference between the clamping devices in different devices lies in that the limit value of the torque limiter 24 is different. Thus, by adjusting the limiter of the torque limiter 24, different devices can be adapted. For example, the limit value of the torque limiter 24 in the mobile device is less than that in the open-lid device.

[0055] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0056] The above embodiments only express several implementation manners of the present utility model, and the description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A clamping device, characterized in that, The clamping device comprises: Frame; A driving assembly is mounted on the frame, the driving assembly comprises a driving member, a screw rod and a transmission member, the output end of the driving member is connected to the screw rod and is used to drive the screw rod to rotate, the transmission member is sleeved on the screw rod and is threadedly connected to the screw rod; And a plurality of clamping assemblies, each of which is connected to the transmission member along the circumference of the transmission member and is connected to the frame so that the transmission member can move relative to the screw rod when the screw rod rotates. Each of the clamping assemblies includes a first connecting rod and a second connecting rod. One end of the first connecting rod is rotatably connected to the transmission member, and the other end is rotatably connected to the second connecting rod. The second connecting rod is also rotatably connected to the frame.

2. The clamping device according to claim 1, wherein The rotation connection between the second connecting rod and the frame is arranged at the middle part of the second connecting rod.

3. The clamping device according to claim 2, characterized in that, The second connecting rod comprises a first section and a second section, one end of the first section is rotatably connected to the first connecting rod, and the other end is fixedly connected to the second section, and the first section and the second section are arranged at an angle; The connection point between the first section and the second section is the rotation connection point between the second connecting rod and the frame.

4. The clamping device according to claim 3, characterized in that, The number of the clamping assemblies is two, and the angles between the two first sections and the second sections are opposite or opposite to each other.

5. The clamping device according to claim 1, characterized in that, The driving assembly further comprises a torque limiter, through which the driving member is connected to the screw rod, and the torque limiter can make the driving member idle when the torque of the driving member is greater than the limit of the torque limiter.

6. The clamping device according to claim 1, wherein The clamping device also includes a plurality of mounting seats, each of which is mounted on the transmission member and is used to be rotatably connected to each of the first connecting rods in a one-to-one correspondence; each of the mounting seats has an opening so that the end of the first connecting rod can extend into and be rotatably connected to the inner wall of the opening.

7. The clamping device according to claim 6, characterized in that, The mounting seat is also provided with a limiting wall, and the limiting wall is located on the rotation path of the first connecting rod so as to limit the rotation angle of the first connecting rod.

8. The clamping device according to claim 1, characterized in that, The frame body comprises a mounting plate, a first side plate and a second side plate, the first side plate and the second side plate are both connected to one side of the mounting plate and are spaced apart, the mounting plate, the first side plate and the second side plate are enclosed to form a receiving space, the mounting plate is provided with a through hole penetrating the mounting plate, and the through hole is communicated with the receiving space; The driving member is installed on a side of the mounting plate away from the first side plate, the output end of the driving member extends into the receiving space through the through hole, the screw rod, the transmission member and the first connecting rod are received in the receiving space, and the second connecting rod partially extends out of the receiving space.

9. The clamping device according to claim 8, wherein, The frame also includes a plurality of support members, one end of each support member is connected to the first side plate, and the other end is connected to the second side plate. Each second connecting rod is provided with a hole so that it can be mounted on the support member one by one and can rotate relative to the frame.

10. An analyzer, characterized in that, Comprising a clamping device as described in any one of claims 1-9.

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