CN210846476U

CN210846476U - Chemistry experiment test tube clamp that facilitates use

Info

Publication number: CN210846476U
Application number: CN201921853925.5U
Authority: CN
Inventors: 牟怡安
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-06-26
Anticipated expiration: 2029-10-29

Abstract

The utility model belongs to the technical field of the teaching aid technique and specifically relates to a chemistry experiment test tube clamp who facilitates use, including adjusting pole, holding rod, horizontal pole and connecting rod, adjust pole lower part threaded connection in holding rod upper portion, be equipped with the gear in the holding rod, the meshing of gear rear end has the rack, it has the traction lever to peg graft in the regulation pole, traction lever lower part threaded connection rack upper portion, it has the horizontal pole to adjust pole top rigid coupling, and the inside left and right sides of horizontal pole all is pegged graft and is had the third slider, the traction lever up end left and right sides articulates there is the bracing piece, and the articulated third slider medial surface lower extreme in the bracing piece upper end, the connecting rod is total two, and its inboard end face upper portion rigid coupling has the arc. The utility model has the advantages of reasonable design, can press from both sides the test tube tightly through pulling and loosening the gear, hold between adjusting pole upper portion and rotating the holding rod, can directly adjust the holding rod as required to the distance between the test tube that the arc clamp splice was got.

Description

Chemistry experiment test tube clamp that facilitates use

Technical Field

The utility model belongs to the technical field of teaching aid technique and specifically relates to a chemistry experiment test tube clamp that facilitates use.

Background

At present, schools organize students to carry out experiments by themselves when carrying out chemical teaching, thereby strengthening the impression of students on chemical experiments and improving the learning enthusiasm of the students. When carrying out the chemistry experiment, often will use the test tube, but because the built-in chemical reagent of test tube many all have corrosivity, can not directly contact with the hand, need use the test tube clamp, traditional test tube clamp centre gripping is inconvenient, and length is shorter, inconvenient centre gripping test tube washs the operation such as, in the chinese utility model patent of bulletin number CN208727564U, a test tube centre gripping placer for the chemistry experiment has been published, grip ring and supporting piece cooperation centre gripping test tube are stable firm, handheld handle washs the test tube, can prevent that remaining chemical reagent in the test tube from damaging the hand but the device can not adjust length as required, and when holding the handle, the problem that can not appear can not enough T shape pole, just need both hands to operate this moment, and it is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming above-mentioned technical shortcoming and providing a chemistry experiment test tube clamp that facilitates use, can press from both sides the test tube tightly through pulling and loosening the gear, hold between the fingers and adjust pole upper portion and rotate the holding rod, can directly adjust the holding rod as required to the distance between the test tube that arc clamp splice was got.

The utility model provides a technical scheme that technical problem adopted does: a chemical experiment test tube clamp convenient to use comprises a regulating rod, a holding rod, a cross rod and a connecting rod, wherein the lower portion of the regulating rod is in threaded connection with the upper portion of the holding rod, limiting sliding strips are fixedly connected to the left side wall and the right side wall inside the holding rod, a first sliding groove is formed in the inner side of the limiting sliding strips, a connecting shaft is fixedly connected to the lower portion of the limiting sliding strips inside the holding rod, a gear is sleeved in the middle of the connecting shaft, an opening is formed in the front end face of the holding rod, the front end of the gear penetrates out of the opening, a rack is meshed with the rear end of the gear, first sliding blocks are fixedly connected to the left side and the right side of the rack and clamped in the first sliding grooves, the first sliding grooves are used for limiting the rack to move up and down only and prevent the rack from being separated from the gear, meanwhile, when the holding rod rotates, the rack rotates together with the, the left side and the right side of the traction rod are fixedly connected with second sliding blocks, the second sliding blocks are clamped in second sliding grooves, the second sliding grooves are used for limiting the traction rod to only move up and down, and simultaneously ensuring that the traction rod rotates along with the adjusting rod when the adjusting rod rotates, the lower part of the traction rod is in threaded connection with the upper part of a rack, the thread pitch and the rotating direction of the traction rod, the rack, a holding rod and the adjusting rod are the same, so that when the distance between the holding rod and the adjusting rod changes due to the mutual rotation between the holding rod and the adjusting rod, the traction rod and the rack driven along with the rotation also rotate mutually, the change of the distance between the holding rod and the adjusting rod is the same as the change of the distance between the holding rod and the adjusting rod, the top end of the adjusting rod is fixedly connected with a cross rod, the left side and the right side of the inner part of the cross rod are both inserted with third sliding, the left side and the right side of the upper end surface of the traction rod are hinged with support rods, the upper ends of the support rods pass through the first through groove and the second through groove and are hinged with the lower ends of the inner end surfaces of the third slide blocks, the upper end surface of the cross rod is provided with the third through groove, the two connection rods are fixedly connected with the arc-shaped clamping blocks, the lower ends of the connection rods are respectively fixedly connected with the upper end surfaces of the left slide block and the right slide block inside the cross rod, when the gear is pulled downwards outside the opening at the front end of the holding rod to rotate, the rack drives the traction rod to move upwards, so that the two support rods push the two third slide blocks to move towards the left side and the right side respectively to separate the two arc-shaped clamping blocks, the two arc-shaped clamping blocks are conveniently placed outside the test tube to release the gear, the rack moves downwards under the downward pulling force of the traction spring, the traction rod is also driven to move downwards, and, two arc clamp splice closures this moment can press from both sides the test tube tightly, holds between the fingers regulation pole upper portion and rotates the holding rod, and the traction lever can not rotate in the second spout because of the second slider joint, and the rack then because the spacing emergence of being driven of first slider rotates, and this makes between traction lever and the rack apart from synchronous and holding rod and regulation pole change to adjust the holding rod as required and get the test tube distance between the clamp.

Furthermore, the outer surface of the holding rod is provided with anti-slip lines so as to enhance the friction force when the holding rod is held.

Furthermore, the lower part of the holding rod is provided with a fixing hole, and one side of the fixing hole is in threaded connection with a fastening knob so as to fix the device on the test tube rack.

Further, arc clamp splice medial surface rigid coupling has the rubber pad to reduce the damage that probably causes the test tube when pressing from both sides the test tube.

The utility model discloses the beneficial effect who has is: the utility model has the advantages of reasonable design, when the outside-in opening of holding rod front end is pulled the gear down and is made it rotate, two arc clamp splices can part, be convenient for this moment arrange the test tube outside with two arc clamp splices, loosen the gear, two arc clamp splices are closed, can press from both sides the test tube tightly, hold between the fingers and adjust pole upper portion and rotate the holding rod, change with the holding rod and the regulation pole in step apart from between traction lever and the rack to adjust the holding rod to the distance between the test tube that the arc clamp splice was got to needs.

Drawings

Fig. 1 is a schematic diagram of the internal structure of the present invention.

Fig. 2 is a schematic diagram of the external structure of the present invention.

Fig. 3 is a schematic cross-sectional view of the grip of the present invention.

Detailed Description

The present invention will be described in detail below with reference to fig. 1 to 3.

As shown in figures 1-3, and taking figure 1 as an orientation reference, the utility model comprises an adjusting rod 1, a holding rod 2, a cross rod 11 and a connecting rod 14, wherein the lower part of the adjusting rod 1 is connected with the upper part of the holding rod 2 by screw threads, the left and right side walls inside the holding rod 2 are fixedly connected with a limiting slide bar 3, the inner side of the limiting slide bar 3 is provided with a first chute 3-1, the inside of the holding rod 2 is fixedly connected with a connecting shaft 4 below the limiting slide bar 3, the middle part of the connecting shaft 4 is sleeved with a gear 5, the front end surface of the holding rod 2 is provided with an opening 2-1, the front end of the gear 5 penetrates out of the opening 2-1, the rear end of the gear 5 is engaged with a rack 6, the left and right sides of the rack 6 are fixedly connected with first sliders 7, the first sliders 7 are clamped in the first chute 3-1, the first chute 3-1 is used for limiting the rack, the rack 6 rotates together with the holding rod 2, a traction spring 8 is fixedly connected between the rack 6 and the inner bottom surface of the holding rod 2, a second sliding groove 1-1 is arranged at the lower side in the adjusting rod 1, a traction rod 9 is inserted in the adjusting rod 1, second sliding blocks 10 are fixedly connected to the left side and the right side of the traction rod 9, the second sliding blocks 10 are clamped in the second sliding grooves 1-1, the second sliding grooves 1-1 are used for limiting the traction rod 9 to only move up and down, and simultaneously, when the adjusting rod 1 rotates, the traction rod 9 rotates together with the adjusting rod 1, the lower part of the traction rod 9 is in threaded connection with the upper part of the rack 6, the thread pitches and the rotating directions of the traction rod 9, the rack 6, the holding rod 2 and the adjusting rod 1 are the same, and further, when the distance between the holding rod 2 and the adjusting rod 1 is changed due to the mutual rotation between the holding rod 9 and the rack 6, the distance between the holding rod 9, a cross bar 11 is fixedly connected to the top end of the adjusting rod 1, third sliding blocks 12 are inserted into the left side and the right side of the interior of the cross bar 11, the outer diameter of each third sliding block 12 is matched with the inner diameter of the corresponding cross bar 11, first through grooves 1-2 are formed in the upper portions of the left side end face and the right side end face of the adjusting rod 1, second through grooves 11-1 are formed in the lower end face of the cross bar 11 on the left side and the right side of the adjusting rod 1, support rods 13 are hinged to the left side and the right side of the upper end face of each traction rod 9, the upper ends of the support rods 13 penetrate through the first through grooves 1-2 and the second through grooves 11-1 and are hinged to the lower ends of the inner side end faces of the third sliding blocks 12, third through grooves 11-2 are formed in the upper end face of the cross bar 11, an arc-shaped clamping block 15 is, when the gear 5 is driven to rotate by pulling the gear 5 downwards from the outside of the opening 2-1 at the front end of the holding rod 2, the rack 6 drives the draw bar 9 to move upwards, so that the two support rods 13 push the two third slide blocks 12 to move towards the left and the right respectively, the two arc-shaped clamping blocks 15 are separated, the two arc-shaped clamping blocks 15 are conveniently placed outside a test tube, the gear 5 is loosened, the rack 6 moves downwards under the action of the downward pulling force of the draw spring 8, the draw bar 9 is also driven to move downwards, the two support rods 13 drive the two third slide blocks 12 to move towards the middle in the cross bar 11, the two arc-shaped clamping blocks 15 are closed, the test tube can be clamped, the upper part of the adjusting rod 1 is pinched and the holding rod 2 is rotated, the rack 6 cannot rotate due to the clamping of the second slide block 10 in the second chute 1-1, the rack 6 is driven to rotate due to the limiting position of the first slide block 7, and the distance between the draw bar 9 and the rack 6 is synchronous with, so as to adjust the distance between the holding rod 2 and the test tube clamped by the arc-shaped clamping block 15 according to the requirement.

In this embodiment, the outer surface of the grip 2 is provided with anti-slip threads 2-2 to enhance the friction force when the grip 2 is held.

In this embodiment, the lower portion of the holding rod 2 is provided with a fixing hole 2-3, and a fastening knob 16 is screwed on one side of the fixing hole 2-3, so as to fix the device on the test tube rack.

In this embodiment, the inner side surface of the arc-shaped clamping block 15 is fixedly connected with a rubber pad 17 so as to reduce the possible damage to the test tube when the test tube is clamped.

Use the utility model discloses the time, only need to hold the holding rod 2 and pull gear 5 downwards, can make two arc clamp splice 15 part, be convenient for arrange two arc clamp splice 15 outside the test tube this moment, loosen gear 5, two arc clamp splice 15 are closed, can press from both sides the test tube tightly, hold between the fingers and adjust 1 upper portion of pole and rotate holding rod 2, traction lever 9 can not rotate because of second slider 10 joint in second spout 1-1, rack 6 then because the spacing emergence of being driven of first slider 7 rotates, the distance is synchronous and holding rod 2 and adjust pole 1 and change between traction lever 9 and the rack 6, in order to adjust the holding rod 2 as required to the distance between the test tube that arc clamp splice 15 was got.

Claims

1. The utility model provides a chemistry experiment test tube clamp that facilitates use, includes regulation pole, holding rod, horizontal pole and connecting rod, its characterized in that: the lower portion of the adjusting rod is in threaded connection with the upper portion of the holding rod, limiting sliding strips are fixedly connected to the left side wall and the right side wall inside the holding rod, a first sliding groove is formed in the inner side of each limiting sliding strip, a connecting shaft is fixedly connected to the lower portion of each limiting sliding strip inside the holding rod, a gear is sleeved in the middle of each connecting shaft, an opening is formed in the front end face of the holding rod, the front end of each gear penetrates out of the opening, a rack is meshed at the rear end of each gear, first sliding blocks are fixedly connected to the left side and the right side of each rack and clamped in the corresponding first sliding grooves, a traction spring is fixedly connected between each rack and the inner bottom face of the holding rod, a second sliding groove is formed in the lower side inside the adjusting rod, a traction rod is inserted in the adjusting rod, second sliding blocks are fixedly connected to the left side and the right side of the traction rod, the second, the left and right sides in the horizontal pole is all pegged graft and has been had the third slider, just the third slider external diameter matches with the horizontal pole internal diameter is suitable, it all is equipped with first logical groove to adjust pole left and right sides terminal surface upper portion, the horizontal pole lower extreme all is equipped with the second and leads to the groove in the regulation pole left and right sides, the traction lever up end left and right sides articulates there is the bracing piece, and the bracing piece upper end passes first logical groove and second and leads to the groove and articulate third slider medial surface lower extreme, the horizontal pole up end is equipped with the third and leads to the groove, the connecting rod is total two, and its medial surface upper portion rigid coupling has the arc clamp splice, and two third slider up end about the inside rigid coupling of horizontal pole.

2. A chemical experiment tube clamp convenient to use according to claim 1, characterized in that: the outer surface of the holding rod is provided with anti-skid grains.

3. A chemical experiment tube clamp convenient to use according to claim 1, characterized in that: the lower part of the holding rod is provided with a fixing hole, and one side of the fixing hole is in threaded connection with a fastening knob.

4. A chemical experiment tube clamp convenient to use according to claim 1, characterized in that: and a rubber pad is fixedly connected to the inner side surface of the arc-shaped clamping block.