Iron support connecting and fixing device

Abstract

The utility model provides an iron stand connecting and fixing device which is characterized in that one end of a main rod is connected with one end of a clamping ring outer ring, the other end of the main rod is provided with a first threaded hole, and the other end of the clamping ring outer ring is provided with a second threaded hole; a bayonet is formed in the side, away from the clamping ring, of the main rod in a penetrating mode. The first threaded hole communicates with the side face of the bayonet. The first fastening screw is connected with the first threaded hole through a thread pair, and the second fastening screw is connected with the second threaded hole through a thread pair. A first through hole is formed in the end, connected with the main rod, of the clamping ring, a first blind hole is formed in the end, connected with the clamping ring, of the main rod, the first through hole and the first blind hole are communicated to form a lifting pin channel, a lifting pin is arranged in the lifting pin channel, and one end of the lifting pin is connected with the bottom of the first blind hole through a spring. The two sides of the experimental device are clamped through the second fastening screws and the lifting pins, so that the clamping tightness is improved, and the situation that the thin experimental device makes contact with the inner ring of the clamping ring and shakes is avoided.

Description

Technical Field

[0001] The utility model relates to the field of chemistry, in particular to chemical experimental equipment, especially clamping appliances, and specifically to a connecting and fixing device for an iron stand. Background Art

[0002] In the prior art, the clamping and fixing device of the commonly used iron stand in the laboratory is composed of an opening for fixing a vertical iron stand and a clamping opening. An experimental device (such as a cross bar, a test tube clamp, etc.) is clamped in the clamping opening, and then the fixing effect is achieved by tightening a screw.

[0003] In the prior art, the clamping and fixing device of the iron stand is adapted to experimental devices with a larger diameter, and the clamping opening is a large-diameter circle. However, when clamping a thinner experimental device, the experimental device is prone to falling off when contacting the edge of the large-diameter clamping opening, the clamping is unstable, and the shaking of the experimental device will also cause the clamping accuracy to decrease. And over-tightening the screw may cause damage to the experimental device. In addition, the clamping of the experimental device at different angles cannot well meet the experimental requirements. Summary of the Invention

[0004] The purpose of the utility model is to provide a connecting and fixing device for an iron stand, and the connecting and fixing device for an iron stand is to solve the technical problems of poor clamping, poor clamping accuracy, damage to the experimental device, and clamping angle adjustment in the prior art.

[0005] A connecting and fixing device for an iron stand includes a main rod and a clamping ring. One end of the main rod is connected to one end of the outer ring of the clamping ring. The other end of the main rod is provided with a first threaded hole along its axial direction. The other end of the outer ring of the clamping ring is provided with a second threaded hole along the radial direction of the clamping ring. A bayonet is provided through the side of the main rod away from the clamping ring along the radial direction of the main rod, and the first threaded hole is communicated with the side of the bayonet.

[0006] It includes a first fastening screw and a second fastening screw. The first fastening screw is connected to the first threaded hole through a thread pair, and the second fastening screw is connected to the second threaded hole through a thread pair. One end of the second fastening screw extends along the radial direction of the clamping ring into the clamping ring.

[0007] One end of the clamping ring connected to the main rod is provided with a first through hole, and one end of the main rod connected to the clamping ring is provided with a first blind hole. The first through hole and the first blind hole are communicated to form a top pin channel. A top pin is arranged in the top pin channel. One end of the top pin is connected to the bottom of the first blind hole through a spring, and the other end of the top pin is located inside the clamping ring.

[0008] Furthermore, a sliding block is arranged at one end of the spring close to the bottom of the first blind hole. The sliding block and the first blind hole form a sliding pair, and an adjusting rod is arranged on the sliding block.

[0009] A chute is provided on the side of the main rod, and more than two L-shaped card slots are provided on one side of the chute. The chute and the card slots communicate with the first blind hole, and one end of the adjusting rod passes through the chute or the card slot and is arranged outside the main rod.

[0010] Further, more than two second blind holes are provided at one end of the main rod connected to the snap ring. The second blind holes are concentrically arranged around the axis of the main rod. Two or more second through holes concentric with the second blind holes are provided at one end of the snap ring connected to the main rod;

[0011] It includes more than two connecting screws. One end of the connecting screw passes through the second through hole and is connected to the second blind hole through a thread pair.

[0012] Further, a soft pad is provided at one end of the top pin close to the snap ring.

[0013] Furthermore, a soft pad is provided at one end of the second fastening screw close to the center of the snap ring.

[0014] Beneficial effects

[0015] Compared with the prior art, the effects of the present utility model are positive and obvious:

[0016] 1. The clamping firmness is improved by clamping both sides of the experimental device with the second fastening screw and the top pin, avoiding the shaking caused by the contact between the thinner experimental device and the inner ring of the snap ring.

[0017] 2. The adaptability to the surface of the experimental device is improved by the soft pads at the ends of the second fastening screw and the top pin, avoiding damage to the experimental device.

[0018] 3. The elastic force of the top pin is adjusted by the slider and the adjusting rod, so as to adapt to experimental devices of different specifications.

[0019] 4. By passing the connecting screw through the second through hole and connecting it to any second blind hole, the angle between the snap ring and the main rod is adjusted to meet more experiments with different clamping angles. Description of the drawings

[0020] Figure 1 . Schematic structural diagram of Embodiment 1.

[0021] Figure 2 . Schematic cross-sectional diagram of Embodiment 1.

[0022] Figure 3 . Schematic structural diagram of Embodiment 2.

[0023] Figure 4 . Schematic cross-sectional diagram of Embodiment 2.

[0024] Figure 5 . Structural schematic diagram of the third embodiment.

[0025] Figure 6 . End face schematic diagram of the main rod in the third embodiment.

[0026] In the figure: 1 main rod; 101 bayonet; 102 first blind hole; 103 first threaded hole; 104 chute; 105 clamping groove; 106 second blind hole; 2 snap ring; 201 first through hole; 202 second threaded hole; 203 second through hole; 3 first fastening screw; 4 second fastening screw; 5 ejector pin; 501 slider; 502 adjusting rod; 6 connecting screw; 7 spring. Specific implementation manners

[0027] The following embodiments will further illustrate the present utility model, but do not limit the present utility model thereto.

[0028] Embodiment 1:

[0029] As Figures 1 to 2 shown, this embodiment provides a connection and fixing device for an iron stand, including a main rod 1 and a snap ring 2. One side of the snap ring 2 has an opening. One end of the main rod 1 is fixedly connected to one end of the outer ring of the snap ring 2. The other end of the main rod 1 is provided with a first threaded hole 103 along its axial direction. The other end of the outer ring of the snap ring 2 is provided with a second threaded hole 202 along the radial direction of the snap ring 2.

[0030] A bayonet 101 is provided through the side of the main rod 1 at a position far from the snap ring 2 along the radial direction of the main rod 1. The bayonet 101 can be connected to the vertical rod of the laboratory iron stand to achieve the effect of connection and fixation. The first threaded hole 103 communicates with the side surface of the bayonet 101.

[0031] It includes a first fastening screw 3 and a second fastening screw 4. The first fastening screw 3 is connected to the first threaded hole 103 through a thread pair. The second fastening screw 4 is connected to the second threaded hole 202 through a thread pair. One end of the second fastening screw 4 extends along the radial direction of the snap ring 2 into the snap ring 2. By tightening the first fastening screw 3, the effect of fixing the vertical rod of the laboratory iron stand in the bayonet 101 is achieved. By tightening the second fastening screw 4, the effect of clamping and fixing the experimental device (such as a test tube, a cross bar, etc.) in the snap ring 2 is achieved.

[0032] The snap ring 2 is provided with a first through hole 201 at one end connected to the main rod 1. The main rod 1 is provided with a first blind hole 102 at one end connected to the snap ring 2. The first through hole 201 and the first blind hole 102 communicate to form an ejector pin channel. An ejector pin 5 is arranged in the ejector pin channel. One end of the ejector pin 5 is connected to the bottom of the first blind hole 102 through a spring 7. The other end of the ejector pin 5 is located inside the snap ring 2.

[0033] A limiting block is arranged on the side of the ejector pin 5, and a limiting groove parallel to the axis of the main rod 1 is arranged on the inner side of the first blind hole 102. Both ends of the limiting groove are closed, and the limiting block of the ejector pin 5 moves in the limiting groove, thereby preventing the ejector pin 5 from escaping from the ejector pin channel, thereby achieving a limiting effect.

[0034] The push pin 5 generates elastic force through the spring 7, and the experimental device (such as a test tube, a cross bar, etc.) clamped in the retaining ring 2 is clamped on both sides by the tightening force of the second fastening screw 4 and the elastic force of the push pin 5, thereby preventing the thinner experimental device from directly contacting the larger-diameter inner ring of the retaining ring 2, causing the experimental device to slide along the inner ring of the retaining ring 2 and cause shaking, thereby improving the clamping stability and clamping accuracy.

[0035] The end of the ejector pin 5 close to the clamp ring 2 and the end of the second fastening screw 4 close to the center of the clamp ring 2 are both provided with a soft pad, which will deform when in contact with the surface of the experimental device, so that the end faces of the ejector pin 5 and the second fastening screw 4 can better fit the outer surface of the experimental device, and have a better clamping effect for thinner experimental devices. In addition, the soft pad can also protect the experimental device from being damaged during clamping.

[0036] When clamping a thicker experimental device, the outer surface of the experimental device can also be close to the inner circle of the clamping ring 2, and the ejector pin 5 is immersed in the fixed pin channel and hidden. This embodiment is used in the same way as the ordinary iron frame clamping device.

[0037] Embodiment 2:

[0038] like Figures 3 to 4 As shown, this embodiment is a preferred solution of embodiment 1, and provides an iron frame platform connection and fixing device. The spring 7 in the ejector pin channel is fixedly connected to a slider 501 at one end close to the bottom of the first blind hole 102. The outer side surface of the slider 501 and the inner side surface of the first blind hole 102 form a sliding pair. An adjusting rod 502 is fixedly connected to the slider 501. By moving the adjusting rod 502 by hand, the slider 501 can be driven to slide in the first blind hole 102. Therefore, by changing the position of the slider 501 in the first blind hole 102, the elastic force applied by the spring 7 to the ejector pin 5 is changed, thereby achieving the effect of adjusting the clamping force.

[0039] A slide groove 104 is arranged on the side of the main rod 1, and three L-shaped slots 105 in the same direction are evenly connected to one side of the slide groove 104. The slide groove 104 and the slot 105 are both connected to the first blind hole 102. One end of the adjusting rod 502 passes through the slide groove 104 or the slot 105 and is arranged outside the main rod 1. When the adjusting rod 502 moves in the slide groove 104, it can achieve the effect of driving the slider 501 to slide. When the adjusting rod 502 moves into the slot 105, it achieves the effect of locking the position of the slider 501, thereby fixing the elastic force applied by the spring 7 to the ejector pin 5, and then fixing the clamping force of the ejector pin 5, thereby achieving the effect of adjusting and adapting the clamping force of experimental devices of different specifications and sizes.

[0040] Embodiment 3:

[0041] As Figures 5 to 6 shown, this embodiment is an optimized solution of Embodiment 1 or 2, and provides a fixing device for connecting an iron stand. One end of the main rod 1 connected to the snap ring 2 is provided with twelve second blind holes 106, which are evenly arranged concentrically around the axis of the main rod 1. One end of the snap ring 2 connected to the main rod 1 is provided with two second through holes 203 concentric with the second blind holes 106, and these two second through holes 203 are arranged diagonally.

[0042] It includes two connecting screws 6. One ends of the two connecting screws 6 respectively pass through the two second through holes 203 and are connected to any second blind hole 106 through a thread pair, so as to achieve the connection effect between the snap ring 2 and the main rod 1.

[0043] When it is necessary to adjust the connection angle between the snap ring 2 and the main rod 1, the two connecting screws 6 are removed, the center of the snap ring 2 rotates around the axis of the main rod 1 for angle adjustment, and then the two connecting screws 6 are reconnected to the second blind holes 106 at the corresponding angles, so as to achieve the fixing effect of the snap ring 2 after angle adjustment.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fixing device for connecting an iron stand, characterized in that: It includes a main rod (1) and a clamping ring (2). One end of the main rod (1) is connected to one end of the outer ring of the clamping ring (2). The other end of the main rod (1) is axially provided with a first threaded hole (103). The other end of the outer ring of the clamping ring (2) is radially provided with a second threaded hole (202) along the clamping ring (2). On the side of the main rod (1) away from the clamping ring (2), a bayonet (101) is radially penetrated. The first threaded hole (103) communicates with the side of the bayonet (101). It includes a first fastening screw (3) and a second fastening screw (4). The first fastening screw (3) is connected to the first threaded hole (103) through a thread pair. The second fastening screw (4) is connected to the second threaded hole (202) through a thread pair. One end of the second fastening screw (4) extends radially into the clamping ring (2). At one end of the clamping ring (2) connected to the main rod (1), a first through hole (201) is provided. At one end of the main rod (1) connected to the clamping ring (2), a first blind hole (102) is provided. The first through hole (201) and the first blind hole (102) communicate to form a top pin channel. A top pin (5) is arranged in the top pin channel. One end of the top pin (5) is connected to the bottom of the first blind hole (102) through a spring (7). The other end of the top pin (5) is located inside the clamping ring (2).

2. The fixing device for connecting an iron stand according to claim 1, characterized in that: One end of the spring (7) close to the bottom of the first blind hole (102) is provided with a slider (501). The slider (501) forms a sliding pair with the first blind hole (102). An adjusting rod (502) is arranged on the slider (501). A chute (104) is arranged on the side of the main rod (1). On one side of the chute (104), more than two L-shaped clamping grooves (105) are provided. The chute (104), the clamping grooves (105) and the first blind hole (102) communicate. One end of the adjusting rod (502) passes through the chute (104) or the clamping grooves (105) and is arranged outside the main rod (1).

3. The fixing device for connecting an iron stand according to claim 1, characterized in that: More than two second blind holes (106) are provided at one end of the main rod (1) connected to the clamping ring (2). The second blind holes (106) are concentrically arranged around the axis of the main rod (1). More than two second through holes (203) concentric with the second blind holes (106) are provided at one end of the clamping ring (2) connected to the main rod (1). It includes more than two connecting screws (6). One end of the connecting screw (6) passes through the second through hole (203) and is connected to the second blind hole (106) through a thread pair.

4. The fixing device for connecting an iron stand according to claim 1, characterized in that: A soft pad is arranged at one end of the top pin (5) close to the clamping ring (2).

5. The iron stand connection and fixation device according to claim 4, wherein: A soft pad is provided at one end of the second fastening screw (4) close to the center of the snap ring (2).

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