Self-locking mechanism for rapid plastometer

Abstract

The utility model discloses a self-locking mechanism for a rapid plastometer, and relates to the technical field of rapid plastometers, the self-locking mechanism comprises a plastometer body, the outer wall of the plastometer body is provided with a display screen, through the arrangement of a clamping groove, when the rapid plastometer is used daily, in order to improve the self-locking effect of a weight during lifting motion, the display screen is arranged on the outer wall of the plastometer body. According to the invention, a rotary knob can be rotated to drive a threaded sliding block to slide along the inner wall of a sliding groove through the rotation of a threaded rod when the weight is used, and the threaded sliding block slides to drive a lifting rod to slide along the inner wall of a limiting groove through the rotation of a rotating rod and the connection of a connecting block, so that the weight is convenient to detach and clean when the weight is used for a long time. And meanwhile, when the lifting rod and the weight need to be disassembled, the bolt is rotated to drive the bolt to be pulled out of the inner wall of the clamping groove through the limiting effect of the nut, the effect of conveniently disassembling the weight is achieved, and the effect of improving cleaning of impurities on the surface of the weight is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of rapid plasticity gauges, in particular to a self-locking mechanism for rapid plasticity gauges. Background Art

[0002] Rapid plasticity gauge is an instrument that can quickly measure the plasticity of raw rubber and unvulcanized rubber. The most widely used Wallace rapid plasticity gauge is used to measure the initial value of natural rubber plasticity and plasticity retention rate. It is an important instrument for testing natural rubber quality indicators. At present, rapid plasticity gauges on the market all use springs or levers to make the 100N force required by the national standard act on the specimen from bottom to top. Due to the friction of the lever and the fatigue loss of the spring, the force will deviate after a period of use, thus affecting the test results.

[0003] For example, announcement number CN215297044U discloses a rapid plastic meter with a self-locking connecting rod mechanism, including a support, a first gear, a first connecting rod, a second gear, a pin, a second connecting rod, a third connecting rod, a bracket, a push rod, a collar, a joint, a weight, a rotating rod, a turntable, a screw hole and a plug. The front of the support is equipped with a first gear, and the front of the first gear is connected to the first connecting rod, a second gear is arranged below the first gear, a pin is arranged below the first connecting rod, and the upper right corner of the pin is connected to the second connecting rod, the lower right corner of the second connecting rod is equipped with a third connecting rod through the pin, and the rear side of the third connecting rod is equipped with a bracket through the pin, the upper right corner of the second connecting rod is equipped with a push rod through the pin, and the upper end of the push rod is fixed with a collar, the device is provided with a pin to drive the connecting rod and the push rod to rotate, so that the push rod pushes the weight upward to form an angle with the horizontal plane of the third connecting rod and automatically locks it, and the weight will not fall due to gravity.

[0004] However, although the self-locking mechanism used for the rapid plastometer can self-lock the weight when in use, it is not convenient to engage and disassemble the weight on the rapid plastometer when the weight is used for a long time, so that when the weight is used for a long time, the user cannot clean the impurities on the surface of the weight effectively, resulting in the problem that the impurities reduce the measurement accuracy of the weight.

[0005] Therefore, in view of this, the shortcomings of the existing structure are studied and improved, and a self-locking mechanism for a rapid plastometer is proposed. Utility Model Content

[0006] The utility model aims to provide a self-locking mechanism for a rapid plastometer, so as to solve the problem in the background art that the weights on the rapid plastometer are not convenient to be engaged and disassembled.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-locking mechanism for a rapid plastic meter, comprising a plastic meter body, the outer wall of the plastic meter body is provided with a display screen, the outer wall of the plastic meter body is fixedly connected to a connecting frame, the outer wall of the connecting frame is provided with a scale, the top of the connecting frame is rotatably connected to a threaded rod, one end of the threaded rod is fixedly connected to a knob, the outer wall of the threaded rod is threadedly connected to a threaded slider slidably connected to the top of the connecting frame, a sliding groove is provided at the connection position between the top of the connecting frame and the threaded slider, the outer wall of the threaded slider is rotatably connected to a rotating rod, one end of the rotating rod is rotatably connected to a connecting block, the outer wall of the connecting block is detachably connected to a lifting rod slidably connected to the outer wall of the connecting frame, one end of the lifting rod is fixedly connected to a weight, the outer wall of the lifting rod is provided with a display instrument, and a limiting groove is provided at the connection position between the outer wall of the connecting frame and the lifting rod.

[0008] Furthermore, a connecting groove is provided at the connecting portion between the outer wall of the lifting rod and the connecting block, a nut is provided at the top of the lifting rod, the inner wall of the nut is threadedly connected with a bolt slidably connected to the outer wall of the connecting block, and a slot is provided at the connecting portion between the outer wall of the connecting block and the bolt.

[0009] Furthermore, the scales are symmetrically arranged on both sides of the connecting frame.

[0010] Furthermore, the lifting rod is embedded in the inner wall of the limiting groove to perform lifting movement.

[0011] Furthermore, one end of the rotating rod is rotationally connected to the threaded slider via a rotating shaft, and the other end of the rotating rod is rotationally connected to the connecting block via a rotating shaft.

[0012] Furthermore, the inner wall contour of the connecting groove is matched with the outer wall contour of the connecting block.

[0013] Furthermore, the slot is arranged on the movement track of the bolt, and the inner wall contour of the slot is larger than the outer wall contour of the bolt.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model provides a card slot, when the rapid plastic meter is used daily, in order to improve the self-locking effect of the weight during the lifting movement and the convenience of disassembling and cleaning the weight when the weight is used for a long time, when the weight is used, the knob can be turned to drive the threaded slider to slide along the inner wall of the slide slot through the rotation of the threaded rod, and the sliding of the threaded slider drives the lifting rod to slide along the inner wall of the limiting groove through the rotation of the rotating rod and the connection with the connecting block, and drives the weight to perform lifting movement. At the same time, when the lifting rod and the weight need to be disassembled, the bolt is driven to be pulled out from the inner wall of the card slot through the limiting effect of the nut by rotating the bolt, so as to facilitate the disassembly of the weight and improve the effect of cleaning impurities on the surface of the weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the rapid plastic meter;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the rapid plastic meter in another direction;

[0018] Figure 3 It is a schematic diagram of the connection structure between the threaded slider and the rotating rod;

[0019] Figure 4 It is a schematic diagram of the distribution structure of the connection blocks and connection slots.

[0020] In the figure: 1. plastic meter body; 2. display screen; 3. connecting frame; 4. scale; 5. threaded rod; 6. threaded slider; 7. knob; 8. slide groove; 9. rotating rod; 10. lifting rod; 11. limit groove; 12. weight; 13. display instrument; 14. connecting block; 15. connecting groove; 16. nut; 17. bolt; 18. slot. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1: Figure 1-Figure 3As shown, a self-locking mechanism for a rapid plastometer comprises a plastometer body 1, the outer wall of the plastometer body 1 is provided with a display screen 2, the outer wall of the plastometer body 1 is fixedly connected with a connecting frame 3, the outer wall of the connecting frame 3 is provided with a scale 4, the top of the connecting frame 3 is rotatably connected with a threaded rod 5, one end of the threaded rod 5 is fixedly connected with a knob 7, the outer wall of the threaded rod 5 is threadedly connected with a threaded slider 6 slidably connected to the top of the connecting frame 3, a slide groove 8 is provided at the connection position between the top of the connecting frame 3 and the threaded slider 6, the outer wall of the threaded slider 6 is rotatably connected with a rotating rod 9, one end of the rotating rod 9 is rotatably connected with a connecting block 14, the outer wall of the connecting block 14 is detachably connected with a lifting rod 10 slidably connected to the outer wall of the connecting frame 3, one end of the lifting rod 10 is fixedly connected with a weight 12, the outer wall of the lifting rod 10 is provided with a display instrument 13, and the connection position between the outer wall of the connecting frame 3 and the lifting rod 10 is provided with a limiting groove 11.

[0023] Furthermore, the scales 4 are symmetrically arranged on both sides of the connecting frame 3 , which is beneficial for effectively controlling the lifting distance of the weight 12 .

[0024] Furthermore, the lifting rod 10 is embedded in the inner wall of the limiting groove 11 for lifting movement. The setting of the lifting rod 10 being embedded in the inner wall of the limiting groove 11 for lifting movement can improve the sliding stability of the lifting rod 10 on the inner wall of the limiting groove 11.

[0025] Furthermore, one end of the rotating rod 9 is rotationally connected to the threaded slider 6 via a rotating shaft, and the other end is rotationally connected to the connecting block 14 via a rotating shaft. The rotating rod 9 forms a rotating structure between the threaded slider 6 and the connecting block 14, and through the self-locking effect of the threaded rod 5, the weight 12 is effectively self-locked during lifting.

[0026] Embodiment 2: Figure 1 , Figure 2 and Figure 4As shown, the utility model proposes a self-locking mechanism for a rapid plastic meter. Compared with the first embodiment, as another implementation mode of the utility model, a connecting groove 15 is provided at the connecting portion between the outer wall of the lifting rod 10 and the connecting block 14, a nut 16 is provided at the top of the lifting rod 10, and a bolt 17 slidably connected to the outer wall of the connecting block 14 is threadedly connected to the inner wall of the nut 16, and a slot 18 is provided at the connecting portion between the outer wall of the connecting block 14 and the bolt 17. When working, the slot 18 is provided to improve the self-locking effect of the weight 12 during the lifting movement when the rapid plastic meter is used daily, and the weight 12 is used for a long time. To facilitate the disassembly and cleaning of the weight 12, when the weight 12 is used, the knob 7 can be turned to rotate the threaded rod 5 to drive the threaded slider 6 to slide along the inner wall of the slide groove 8. The sliding of the threaded slider 6 drives the lifting rod 10 to slide along the inner wall of the limiting groove 11 through the rotation of the rotating rod 9 and the connection with the connecting block 14, and drives the weight 12 to perform a lifting movement. At the same time, when the lifting rod 10 and the weight 12 need to be disassembled, the bolt 17 is turned through the limiting effect of the nut 16 to drive the bolt 17 to be pulled out from the inner wall of the slot 18, thereby facilitating the disassembly of the weight 12 and improving the effect of cleaning impurities on the surface of the weight 12.

[0027] Furthermore, the inner wall profile of the connecting groove 15 is adapted to the outer wall profile of the connecting block 14, which is beneficial for driving the pre-positioning installation between the lifting rod 10 and the connecting block 14 through the adapted setting between the inner wall profile of the connecting groove 15 and the outer wall profile of the connecting block 14.

[0028] Furthermore, the slot 18 is arranged on the movement trajectory of the bolt 17, and the inner wall contour of the slot 18 is larger than the outer wall contour of the bolt 17. The connecting block 14 forms a locking structure with the lifting rod 10 through the bolt 17 and the slot 18, which is beneficial for the bolt 17 to slide along the inner wall of the slot 18, driving the lifting rod 10 and the connecting block 14 to be locked and fixed, thereby facilitating the disassembly of the weight 12 and achieving the effect of improving the cleaning of impurities on the surface of the weight 12.

[0029] Working principle: When using the self-locking mechanism for the rapid plastic meter, when the rapid plastic meter is used daily, in order to improve the self-locking effect of the weight 12 during the lifting movement, and the convenience of disassembling and cleaning the weight 12 when the weight 12 is used for a long time, when the weight 12 is used, the knob 7 can be turned to rotate through the threaded rod 5 to drive the threaded slider 6 to slide along the inner wall of the slide groove 8. The sliding of the threaded slider 6 drives the lifting rod 10 to slide along the inner wall of the limiting groove 11 through the rotation of the rotating rod 9 and the connection with the connecting block 14, and drives the weight 12 to lift and lower. At the same time, when the lifting rod 10 and the weight 12 need to be disassembled, the bolt 17 is turned through the limiting effect of the nut 16 to drive the bolt 17 to be pulled out from the inner wall of the slot 18, so as to facilitate the disassembly of the weight 12 and improve the effect of cleaning the impurities on the surface of the weight 12.

[0030] This is how the self-locking mechanism for a rapid plastometer works.

[0031] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A self-locking mechanism for a rapid plastometer, comprising a plastometer body (1), characterized in that: The outer wall of the plastic meter body (1) is provided with a display screen (2), the outer wall of the plastic meter body (1) is fixedly connected to a connecting frame (3), the outer wall of the connecting frame (3) is provided with a scale (4), the top of the connecting frame (3) is rotatably connected to a threaded rod (5), one end of the threaded rod (5) is fixedly connected to a knob (7), the outer wall of the threaded rod (5) is threadedly connected to a threaded slider (6) slidably connected to the top of the connecting frame (3), and the connection portion between the top of the connecting frame (3) and the threaded slider (6) is provided with a The outer wall of the threaded slider (6) is rotatably connected to a rotating rod (9), one end of the rotating rod (9) is rotatably connected to a connecting block (14), the outer wall of the connecting block (14) is detachably connected to a lifting rod (10) slidably connected to the outer wall of the connecting frame (3), one end of the lifting rod (10) is fixedly connected to a weight (12), the outer wall of the lifting rod (10) is provided with a display instrument (13), and a limiting groove (11) is provided at the connection portion between the outer wall of the connecting frame (3) and the lifting rod (10).

2. A self-locking mechanism for a rapid plastometer according to claim 1, characterized in that: A connection groove (15) is provided at a connection position between the outer wall of the lifting rod (10) and the connection block (14); a nut (16) is provided at the top of the lifting rod (10); a bolt (17) is threadedly connected to the inner wall of the nut (16) and is slidably connected to the outer wall of the connection block (14); and a clamping groove (18) is provided at a connection position between the outer wall of the connection block (14) and the bolt (17).

3. A self-locking mechanism for a rapid plastometer according to claim 1, characterized in that: The scales (4) are symmetrically arranged on both sides of the connecting frame (3).

4. A self-locking mechanism for a rapid plastometer according to claim 1, characterized in that: The lifting rod (10) is embedded in the inner wall of the limiting groove (11) to perform lifting movement.

5. A self-locking mechanism for a rapid plastometer according to claim 1, characterized in that: One end of the rotating rod (9) is rotationally connected to the threaded slider (6) via a rotating shaft, and the other end is rotationally connected to the connecting block (14) via a rotating shaft.

6. A self-locking mechanism for a rapid plastometer according to claim 2, characterized in that: The inner wall contour of the connecting groove (15) is adapted to the outer wall contour of the connecting block (14).

7. A self-locking mechanism for a rapid plastometer according to claim 2, characterized in that: The clamping groove (18) is arranged on the movement track of the bolt (17), and the inner wall profile of the clamping groove (18) is larger than the outer wall profile of the bolt (17).

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