CN220951020U - Rocker arm device with bidirectional lifting function - Google Patents

Abstract

The utility model belongs to the technical field of experimental instruments, and particularly relates to a rocker arm device with a bidirectional lifting function. The utility model provides a rocker arm device with a bidirectional lifting function, which can enable a base plate to be provided with a rotating arm, a tray, a lifting block unit, a rotating shaft unit and a lifting ring unit in a way that: 1. the lifting ring unit and the lifting block unit are lifted independently and relatively, bidirectional lifting sampling is realized by the lifting ring unit and the lifting block unit, the lifting amplitude of the rocker arm device is relatively small, and the volume of the device and the space required by sampling work are compressed; 2. the rotation axis unit cooperates with the lifting block unit to operate, the whole volume is further reduced while the device structure is compressed, the positioning precision of the device is obviously improved, the effective service life of the rocker arm device is ensured, and the possibility of sample breakage and sample pollution of the sampling needle is greatly reduced.

Description

Rocker arm device with bidirectional lifting function

Technical Field

The utility model belongs to the technical field of experimental instruments, and particularly relates to a rocker arm device with a bidirectional lifting function.

Background

In the use process of the rocker arm device, the rocker arm needs to have two functions of lifting and rotating, so that the rocker arm device can accurately and stably operate in a small space range, and the transmission and conversion of motion are realized.

On the other hand, most rocker arm devices in the prior art are realized by adopting unidirectional lifting and rotation, and the components mainly comprise: one-way lifting rocker arms and rotating arms. The former guarantees that the rocking arm device can accomplish the sample work through going up and down, and the latter restricts the rotation angle of rocking arm device, fixes a position the device, and the two harmony can realize sampling in little space scope sooner.

The patent publication No. CN215262636U, publication No. 2021.12.21, discloses an automatic sample injection instrument, which comprises a housing, a sample injection needle, a cleaning device and a control part, wherein the sample injection needle is positioned above a placing frame and penetrates through the top end of a rocker arm and the top wall of the housing, and the cleaning device is arranged on the housing.

The general structural principle of the automatic sample injection instrument in the patent of the utility model is as follows: the rocking arm is connected with drive arrangement, realizes the reciprocating and the left and right rotation of rocking arm, runs through the operation of rocking arm top advance needle subassembly for advance the needle and rotate the sample bottle top that corresponds that is located the rack, accomplish the extraction of solution.

However, the automatic sample injector has at least the following 2 defects in the actual use process, in other words, the technical problem to be solved by the utility model.

1. Under the fixed condition of rack, sampling needle relies on the one-way lift of rocking arm to realize the sample, just needs the distance that the unidirectional movement goes up and down to be greater than rack self-body height, then rocking arm device needs bigger space to realize the sample work for rocking arm lifting height is great.

2. The existing rocker arm is large in size, the requirement on a linear motion device of the rocker arm is high in one-way lifting, when the body of a sample tube is increased, the extending length of the rocker arm can only be increased, at the moment, frequent sampling is performed, the positioning accuracy of a sample injection needle is reduced, accidents such as sample injection needle breakage and sample deformation pollution are caused more easily, and the effective service life of the sample injection needle is greatly shortened.

Therefore, in summary, a novel rocker arm device with a bidirectional lifting structure with smaller sampling volume and strong positioning precision is urgently needed at present to solve the barrier in the prior art.

Disclosure of utility model

The utility model provides a rocker arm device with a bidirectional lifting function, which can enable a base plate to be provided with a rotating arm, a tray, a lifting block unit, a rotating shaft unit and a lifting ring unit in a way that: 1. the lifting ring unit and the lifting block unit are lifted independently and relatively, bidirectional lifting sampling is realized by the lifting ring unit and the lifting block unit, the lifting amplitude of the rocker arm device is relatively small, and the volume of the device and the space required by sampling work are compressed; 2. the rotation axis unit cooperates with the lifting block unit to operate, the whole volume is further reduced while the device structure is compressed, the positioning precision of the device is obviously improved, the effective service life of the rocker arm device is ensured, and the possibility of sample breakage and sample pollution of the sampling needle is greatly reduced.

The utility model adopts the technical proposal that: the rocker arm device with the bidirectional lifting function structurally comprises a substrate, a rotating arm, a tray, a rotating shaft unit, a lifting block unit, a lifting ring unit and a lifting ring unit, wherein the rotating shaft unit is arranged on the substrate in a plugging mode and connected with the rotating arm, the lifting block unit is arranged on the lower end face of the rotating shaft unit, and the lifting ring unit is arranged on the substrate and connected with the tray.

The further preferable technical scheme is as follows: the rotating shaft unit comprises a square shaft which is inserted and arranged on the base plate, and a rotating shaft sleeve which is sleeved and arranged on the square shaft, is clamped on the upper surface of the base plate and is used for driving the square shaft to rotate and is arranged inside the outer circle.

The further preferable technical scheme is as follows: the rotary shaft unit further comprises a rotary driven belt wheel sleeved on the rotary shaft sleeve, a rotary synchronous belt arranged on the rotary driven belt wheel, and a rotary driving belt wheel arranged on the base plate and used for rotating the rotary driven belt wheel in a way of meshing the rotary synchronous belt.

The further preferable technical scheme is as follows: the rotation shaft unit further includes a first rotation motor provided on the base plate and used for driving the rotation driving pulley to rotate, and a first photoelectric switch shutter provided on the rotation driven pulley or the rotation driving pulley.

The further preferable technical scheme is as follows: the lifting block unit comprises a first threaded rod, a first internal threaded ring, a limiting block and a limiting grooved plate, wherein the first threaded rod is arranged in the square shaft in a nested mode, the first internal threaded ring is arranged on the first threaded rod, the limiting block is arranged on the first internal threaded ring, and the limiting grooved plate is arranged on the base plate.

The further preferable technical scheme is as follows: the lifting block unit further comprises a platform block which is arranged on the first internal thread ring and used for supporting and connecting the lower end face of the square shaft.

The further preferable technical scheme is as follows: the lifting block unit further comprises a lifting motor arranged on the lower end face of the first threaded rod and a second photoelectric switch baffle arranged on the limiting block.

The further preferable technical scheme is as follows: the lifting ring unit comprises a second threaded rod which is arranged on the base plate and clamped on the upper surface of the base plate, a second internal threaded ring which is arranged on the second threaded rod and connected with the tray, a sliding block which is arranged on the second internal threaded ring, and a linear guide rail which is arranged on the lower end surface of the base plate and used for supporting the sliding block.

The further preferable technical scheme is as follows: the lifting ring unit further comprises a lifting driven belt wheel which is arranged on the base plate and sleeved with the second threaded rod, a lifting synchronous belt which is arranged on the lifting driven belt wheel, and a lifting driving belt wheel which is arranged on the base plate and used for driving the lifting driven belt wheel to rotate in a way of occluding the lifting synchronous belt.

The further preferable technical scheme is as follows: the lifting ring unit further comprises a second rotating motor arranged on the base plate and used for driving the lifting driving belt wheel to rotate, and a third photoelectric switch baffle arranged on the sliding block.

Drawings

Fig. 1 is a schematic view showing the positions of the lifting ring unit and the lifting unit block in the initial state of the present utility model.

Fig. 2 is a schematic view showing the positions of the lifting ring unit and the lifting unit block in the separated state of the present utility model.

Fig. 3 is a perspective view of the present utility model.

Fig. 4 is a top view of the present utility model.

Fig. 5 is a schematic view of the structural positions of the lifting ring unit, the lifting block unit and the rotation shaft unit.

Fig. 6 is a schematic back view of the present utility model.

A base plate 11, a rotating arm 12, and a tray 13;

The sample injection needle 5, the current carrying groove 4 and the bottom plate 6;

a rotation shaft unit 1, a lifting block unit 2 and a lifting ring unit 3;

Square shaft 101, rotary shaft sleeve 102, rotary driven pulley 103, rotary timing belt 104, rotary driving pulley 105, first rotary motor 106, first photoelectric switch damper 107, first photoelectric switch 108, first threaded rod 201, first female screw ring 202, stopper 203, stopper grooved plate 204, platform block 205, lifting motor 206, second photoelectric switch damper 207, second photoelectric switch 208, second threaded rod 301, second female screw ring 302, slider 303, linear guide 304, lifting driven pulley 305, lifting timing belt 306, lifting driving pulley 307, second rotary motor 308, third photoelectric switch damper 309, and third photoelectric switch 310.

Detailed Description

The following description is of the preferred embodiments of the utility model and is not intended to limit the scope of the utility model.

As shown in fig. 1 to 6, the rocker arm device with bidirectional lifting function structurally comprises a base plate 11, a rotating arm 12, a tray 13, a rotating shaft unit 1 which is inserted and arranged on the base plate 11 and connected with the rotating arm 12, a lifting block unit 2 which is arranged on the lower end surface of the rotating shaft unit 1, and a lifting ring unit 3 which is arranged on the base plate 11 and connected with the tray 13.

In this embodiment, the initial position of the device is shown in fig. 1, after the device is started, the lifting ring unit 3 starts to descend, the tray 13 disposed on the lifting ring unit 3 drives the current carrying groove 4 disposed on the tray 13 to descend, meanwhile, the lifting block unit 2 starts to ascend, the rotating shaft unit 1 on the lifting block unit 2 is driven to ascend, the sample injection needle 5 on the rotating arm 12 connected with the rotating shaft unit 1 also ascends synchronously, and stops after reaching a certain position, and the current carrying groove 4 and the sample injection needle on the rotating arm 12 are in a separated state as shown in fig. 2. And then the rotating shaft unit 1 drives the rotating arm 12 to rotate at a certain angle, after the rotating arm 12 is positioned to the corresponding current carrying groove hole position on the current carrying groove 4, the lifting ring unit 3 drives the current carrying groove 4 on the tray 13 to ascend, the lifting block unit 2 drives the sample injection needle 5 on the rotating arm 12 connected with the rotating shaft unit 1 to descend to a certain position, and the device returns to the initial position as shown in fig. 1 for sampling. The bidirectional lifting movement of the lifting ring unit 3 and the lifting block unit 2 greatly reduces the overall height of the device, and the lifting height and difficulty of the rocker arm are obviously reduced.

In addition, the lifting ring unit 3 has the function that the device can lift independently through the self and cooperate with the relative independent lifting mode of the lifting block unit 2 in a smaller space range, so that the unidirectional lifting movement of the device is not required to be greater than the distance of the height of the current carrying groove 4, and has larger relative spacing, and the relative movement of the lifting ring unit and the device reduces the collision possibility between the sample injection needle 5 and the sample tube, so that the device has smaller space, is more convenient to operate and prolongs the effective service life of the device.

Finally, the rotation shaft unit 1 rotates the rotation arm 12, so that the sample injection needle 5 disposed on the rotation arm 12 can accurately position the sample hole in the current carrying groove 4, and successfully extract the required solution in the current carrying groove 4. The lifting block unit 2 drives the rotating shaft unit 1 to lift, the rotating shaft unit 1 can complete lifting movement under the action of the lifting block unit 2 and can independently complete rotating movement, so that the occupied volume of the device and the space required by operation are greatly reduced, and the structure inside the device is compact and stable. The compression volume effect of the lifting block unit 2 and the lifting ring unit 3 which are lifted in a bidirectional independent mode is taken as a main part, and the volume effect of the rotating shaft unit 1 is taken as an auxiliary part, and the two parts exist and act simultaneously.

The rotation shaft unit 1 includes a square shaft 101 inserted and mounted on the base plate 11, and a rotation shaft sleeve 102 inserted and mounted on the square shaft 101 and engaged with the upper surface of the base plate 11, and adapted to drive the square shaft 101 to rotate.

In this embodiment, as shown in fig. 5, the square shaft 101 passes through the base plate 11 and is nested with the rotating sleeve 102 engaged with the base plate 11, the rotating sleeve 102 is engaged with the base plate 11 so as to be rotatable only and not to move up and down, and is provided in an outer circumference and an inner circumference so as to be nested with the square shaft 101, and the two can be relatively slidably and synchronously rotated. The square shaft 101 has the functions of completing lifting movement by connecting the lifting block unit 2 and rotating movement of the rotating shaft unit 1, thereby achieving the functions of compact structure and compressed structural space.

The rotary shaft unit 1 further includes a rotary driven pulley 103 fitted over the rotary sleeve 102, a rotary timing belt 104 provided on the rotary driven pulley 103, and a rotary driving pulley 105 provided on the base plate 11 and adapted to rotate the rotary driven pulley 103 by engaging the rotary timing belt 104.

In the present embodiment, the rotary driving pulley 105, the rotary driven pulley 103, and the rotary timing belt 104 provided on the base plate 11 function as: the rotary driving belt wheel 105 drives the rotary driven belt wheel 103 meshed with the rotary driving belt wheel 104 to rotate by driving the rotary synchronous belt 104 to move, further, the rotary driven belt wheel 103 drives the sleeved rotary shaft sleeve 102 to rotate, the rotary driven belt wheel 103 and the rotary shaft sleeve 102 are fixed through jackscrews, the rotary shaft sleeve 102 clamped on the base plate 11 drives the square shaft 101 nested with the rotary shaft sleeve to rotate, and meanwhile the rotary arm 12 connected with the square shaft 101 synchronously rotates, so that the rotary positioning effect of the rotary arm 12 is achieved.

The rotary shaft unit 1 further includes a first rotary motor 106 provided on the base plate 11 and configured to drive the rotary driving pulley 105 to rotate, and a first photoelectric switch shutter 107 provided on the rotary driven pulley 3 or the rotary driving pulley 105.

In this embodiment, the first rotating electric machine 106 is an existing electric machine, and mainly functions as a power source for rotating the rotary driving pulley 105, so that the rotating shaft unit 1 performs a rotating operation. The first photoelectric switch baffle 107 may trigger the first photoelectric switch 108, the first photoelectric switch baffle 107 disposed on the rotary driven pulley 3 or the rotary driving pulley 105 may trigger the first photoelectric switch 108 used in cooperation with the first photoelectric switch baffle along with a certain number of turns of the first photoelectric switch baffle, and the first photoelectric switch 108 is triggered to control the first rotating motor 106, so that the first rotating motor 106 stops outputting power, and thus the first rotating motor 106 is accurately positioned to an angle requiring rotation, rotation sampling is accurately completed, the number of turns may be preset in advance according to the rotation angle, and a code disc capable of presetting the number of turns in advance may also be disposed on the first photoelectric switch baffle 107, so as to facilitate determination of the rotation angle of the rotating shaft unit 1.

The lifting block unit 2 comprises a first threaded rod 201 which is nested in the square shaft 101, a first internal threaded ring 202 which is arranged on the first threaded rod 201, a limiting block 203 which is arranged on the first internal threaded ring 202, and a limiting slotted plate 204 which is arranged on the base plate 11.

In this embodiment, the first threaded rod 201 serves as a motion guide and a power transmission of the first internally threaded ring 202, and the first internally threaded ring 202 converts the rotational motion of the first threaded rod 201 into an up-and-down vertical lifting motion. The function of the limiting block 203 is to limit the up-and-down freedom degree of the first internal thread ring 202, the protruding block of the limiting block 203 moves up and down in the clamping groove of the limiting grooved plate 204 but cannot rotate left and right, and when the limiting block 203 rises to the top of the clamping groove of the limiting grooved plate 204 along with the first internal thread ring 202, the block of the limiting block 203 can not enable the first internal thread ring 202 to move upwards continuously.

The lifting block unit 2 further includes a platform block 205 disposed on the first internally threaded ring 202 and adapted to support and connect the lower end surface of the square shaft 101.

In this embodiment, the function of the platform block 205 is to support and connect the square shaft 101, the platform block 205 is lifted up and down along with the first internal thread ring 202, to drive the connected square shaft 101 to lift synchronously, and the function of the platform block 205 is not to limit the rotational freedom of the square shaft 101, and to freely rotate when the rotation shaft unit 1 drives the square shaft 101, so that the lifting block unit 2 does not interfere with the rotation of the rotation shaft unit 1.

The lifting block unit 2 further comprises a lifting motor 206 arranged on the lower end surface of the first threaded rod 201, and a second photoelectric switch baffle 207 arranged on the limiting block 203.

In this embodiment, the lifting motor 206 is used as a power source for lifting the lifting block unit 2, and the lifting motor 206 is started to drive the first threaded rod 201 to rotate, so as to drive the first internal threaded ring 202 provided on the first threaded rod 201 to lift and drive the square shaft 101 to synchronously lift. And the second photoelectric switch baffle 207 disposed on the limiting block 203 triggers the second photoelectric switch 208 disposed on the limiting grooved plate 204 when lifting up and down with the first internal thread ring 202, and the second photoelectric switch 208 triggers and then controls the lifting motor 206, so that the lifting motor 206 stops outputting power, and the lifting height of the lifting block unit 2 can be accurately positioned while achieving space compression.

The lifting ring unit 3 includes a second threaded rod 301 provided on the base plate 11 and engaged with the upper surface of the base plate 11, a second female screw ring 302 provided on the second threaded rod 301 and connected to the tray 13, a slider 303 provided on the second female screw ring 302, and a linear guide 304 provided on the lower end surface of the base plate 11 and adapted to support the slider 303.

In this embodiment, the second threaded rod 301 serves as a guide for movement and power transmission of the second internal threaded ring 302, the second threaded rod 301 is defined between the base plate 11 and the bottom plate 6, when the second threaded rod 301 rotates, the second internal threaded ring 302 converts the rotation motion into the up-down lifting motion and drives the tray 13 to up-down lift, so as to drive the current carrying groove 4 and the slider 303 to realize the up-down motion, and the slider 303 and the linear guide rail 304 serve to bear the load generated by the up-down movement of the second internal threaded ring 302, simplify the structure, reduce the friction coefficient and reduce the noise, so that the lifting ring unit 3 is still efficient and stable in the frequent movement state, and meanwhile, the device has smaller volume and longer service life.

In addition, in order not to affect the rotational freedom of the second threaded rod 301 and reduce the loss of the second threaded rod 301 to the base plate 11 and the base plate 6, a deep groove ball bearing may be used to fixedly connect the base plate 11 and the base plate 6, and at the same time, the axial thrust of the high-speed rotation of the second threaded rod 301 is carried on the base plate 11 or the base plate 6 by a thrust bearing.

The lifting ring unit 3 further includes a lifting driven pulley 305 disposed on the base plate 11 and sleeved with the second threaded rod 301, a lifting synchronous belt 306 disposed on the lifting driven pulley 305, and a lifting driving pulley 307 disposed on the base plate 11 and configured to drive the lifting driven pulley 305 to rotate by engaging with the lifting synchronous belt 306.

In this embodiment, the lifting driven pulley 305, the lifting synchronous belt 306 and the lifting driving pulley 307 function to drive the second threaded rod 301 sleeved in the lifting driven pulley 305 to rotate, and the second internally threaded ring 302 converts the rotation motion of the second threaded rod 301 into an up-down lifting motion, so as to achieve the lifting effect of the lifting ring unit 3.

The lifting ring unit 3 further includes a second rotating motor 308 provided on the base plate 11 and used for driving the lifting driving pulley 307 to rotate, and a third photoelectric switch shutter 309 provided on the slider 303.

In this embodiment, the second rotating motor 308 is used as a power source of the lifting ring unit 3, the second rotating motor 308 drives the lifting driving pulley 307 to rotate, and drives the lifting driven pulley 305 to rotate through the lifting synchronous belt 306, so that the second threaded rod 301 finally rotates, the second internal threaded ring 302 and the tray 13 disposed on the second internal threaded ring 302 realize lifting movement, and the lifting ring unit 3 achieves independent lifting effect. In addition, when the slider 303 moves together with the lifting ring unit 3, the third photoelectric switch baffle 309 disposed on the slider 303 also lifts synchronously, and the third photoelectric switch 310 disposed on the substrate 11 is triggered by the third photoelectric switch baffle 309 that moves up and down, so as to further control the second rotating motor 308, thereby achieving space compression and accurately positioning the lifting height of the lifting ring unit 3.

The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model includes but is not limited to the above embodiments, and various modifications can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model. These are all non-inventive modifications which are intended to be protected by the patent laws within the scope of the appended claims.

Claims (10)

1. The utility model provides a rocking arm device with two-way lift function, structure includes base plate (11), swinging boom (12) to and tray (13), its characterized in that: the lifting device further comprises a rotating shaft unit (1) which is inserted and arranged on the base plate (11) and connected with the rotating arm (12), a lifting block unit (2) which is arranged on the lower end face of the rotating shaft unit (1), and a lifting ring unit (3) which is arranged on the base plate (11) and connected with the tray (13).

2. The rocker arm apparatus with bidirectional lifting function according to claim 1, wherein: the rotary shaft unit (1) comprises a square shaft (101) which is inserted and arranged on the base plate (11), and a rotary shaft sleeve (102) which is sleeved and arranged on the square shaft (101) and is clamped on the upper surface of the base plate (11) and used for driving the square shaft (101) to rotate and is arranged at the inner side of the outer circle.

3. A rocker arm apparatus with bi-directional lift function according to claim 2, characterized in that: the rotary shaft unit (1) further comprises a rotary driven belt wheel (103) sleeved on the rotary shaft sleeve (102), a rotary synchronous belt (104) arranged on the rotary driven belt wheel (103), and a rotary driving belt wheel (105) arranged on the base plate (11) and used for rotating the rotary driven belt wheel (103) in a way of engaging the rotary synchronous belt (104).

4. A rocker arm apparatus with a bidirectional lifting function according to claim 3, characterized in that: the rotary shaft unit (1) further includes a first rotary motor (106) provided on the base plate (11) and configured to drive the rotary driving pulley (105) to rotate, and a first photoelectric switching shutter (107) provided on the rotary driven pulley (103) or the rotary driving pulley (105).

5. A rocker arm apparatus with bi-directional lift function according to claim 2, characterized in that: the lifting block unit (2) comprises a first threaded rod (201) which is arranged in the square shaft (101) in a nested mode, a first internal thread ring (202) which is arranged on the first threaded rod (201), a limiting block (203) which is arranged on the first internal thread ring (202) and a limiting slotted plate (204) which is arranged on the base plate (11).

6. The rocker arm apparatus with bi-directional lift function of claim 5, wherein: the lifting block unit (2) further comprises a platform block (205) which is arranged on the first internal thread ring (202) and is used for supporting and connecting the lower end face of the square shaft (101).

7. The rocker arm apparatus with bi-directional lift function of claim 5, wherein: the lifting block unit (2) further comprises a lifting motor (206) arranged on the lower end face of the first threaded rod (201), and a second photoelectric switch baffle plate (207) arranged on the limiting block (203).

8. A rocker arm apparatus with bi-directional lift function according to claim 2, characterized in that: the lifting ring unit (3) comprises a second threaded rod (301) arranged on the base plate (11) and clamped on the upper surface of the base plate (11), a second internal threaded ring (302) arranged on the second threaded rod (301) and connected with the tray (13), a sliding block (303) arranged on the second internal threaded ring (302), and a linear guide rail (304) arranged on the lower end surface of the base plate (11) and used for supporting the sliding block (303).

9. The rocker arm apparatus with bi-directional lift function of claim 8, wherein: the lifting ring unit (3) further comprises a lifting driven belt wheel (305) which is arranged on the base plate (11) and sleeved with the second threaded rod (301), a lifting synchronous belt (306) which is arranged on the lifting driven belt wheel (305), and a lifting driving belt wheel (307) which is arranged on the base plate (11) and used for driving the lifting driven belt wheel (305) to rotate in a manner of engaging the lifting synchronous belt (306).

10. The rocker arm apparatus with bi-directional lift function of claim 9, wherein: the lifting ring unit (3) further comprises a second rotating motor (308) arranged on the base plate (11) and used for driving the lifting driving pulley (307) to rotate, and a third photoelectric switch baffle plate (309) arranged on the sliding block (303).