Spiral worm type lever indicator

Abstract

The utility model belongs to the technical field of lever meters, and particularly relates to a spiral worm type lever meter which comprises a shell, the right end of the shell is provided with a first notch, the first notch is communicated with the interior of the shell, the inner side wall of the first notch is fixedly connected with a fixed shaft, a long rod is arranged in the shell, and the long rod is fixedly connected with the fixed shaft. The outer side wall of the fixed shaft is rotationally sleeved with the right end of the long rod, and the right end of the long rod is fixedly connected with a feeler lever. The utility model has the advantages that when an external feeler lever is adjusted, the feeler lever drives the long rod to rotate, the toothed plate rotates along with the feeler lever, the convex teeth on the toothed plate slide in the spiral groove of the spiral rod to drive the spiral rod to rotate, at the moment, the rotating shaft I rotates, and the pointer is finally caused to deflect and indicate corresponding readings through the transmission of the gear I and the gear II; the lever-spiral transmission structure is relatively low in assembly difficulty, and no gear is arranged in a main transmission structure, so that the phenomenon of meter clamping is less, and the return stroke precision is high.

Description

Technical Field

[0001] The utility model relates to the technical field of lever meters, in particular to a spiral worm type lever meter. Background Art

[0002] The lever gauge is a measuring instrument that uses a lever and a transmission mechanism to convert dimensional changes into angular displacement of the pointer and indicate the numerical value of the length dimension. It is used to measure the geometric shape error and relative position correctness of workpieces, and can measure length by comparison method.

[0003] Most common lever meters on the market use a lever-gear transmission structure, which is difficult to assemble and has a small measuring range.

[0004] In order to solve the above problems, we proposed a spiral worm gear lever meter. Utility Model Content

[0005] The utility model aims to solve the problems in the background technology and proposes a spiral worm type lever meter.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a spiral worm lever meter, comprising a shell, a slot one is opened at the right end of the shell, the slot one is connected to the interior of the shell, the inner side wall of the slot one is fixedly connected with a fixed shaft, a long rod is arranged inside the shell, the right end of the long rod is rotatably sleeved on the outer side wall of the fixed shaft, the right end of the long rod is fixedly connected with a touch rod, the touch rod and the long rod are colinear, the touch rod is located on the outside of the slot one, the left end of the long rod is fixedly connected with a tooth plate, the outer side wall of the tooth plate is evenly distributed with a plurality of convex teeth, the interior of the shell is provided with a transmission mechanism located on the left side of the tooth plate, and the upper side wall of the shell is provided with a number indicating mechanism.

[0007] In the above-mentioned spiral worm gear lever meter, the transmission mechanism includes a bearing 1 fixedly embedded in the upper side wall and the lower side wall of the outer shell, the inner side wall of the bearing 1 is jointly fixedly inserted with a spiral rod located on the left side of the tooth plate, the spiral groove on the spiral rod matches the convex teeth on the tooth plate, the upper end of the spiral rod is fixedly connected to a rotating shaft 1, and the end of the rotating shaft 1 is fixedly sleeved with a gear 1.

[0008] In the above-mentioned spiral worm lever meter, the indicating mechanism includes a plurality of support rods fixedly connected to the upper side wall of the outer shell, the upper ends of the support rods are commonly fixedly connected to a dial, a second bearing is fixedly embedded in the middle of the lower side wall of the dial, a second rotating shaft is fixedly inserted into the inner side wall of the second bearing, a second gear located on the lower side of the dial is fixedly sleeved on the lower end of the second rotating shaft, the second gear is meshed with the first gear, and a pointer located inside the dial is fixedly sleeved on the upper end of the second rotating shaft.

[0009] In the above-mentioned spiral worm lever meter, the tooth plate is arc-shaped, and the center of the tooth plate is on the fixed axis, and the upper side wall and the lower side wall of the shell are respectively provided with a second slot and a third slot.

[0010] In the above-mentioned spiral worm gear lever meter, the inner side wall of the shell is fixedly connected with spring piece 1 and spring piece 2, and the spring piece 1 and spring piece 2 are located at the upper and lower sides of the long rod.

[0011] In the above-mentioned spiral worm gear lever meter, the diameter of gear one is greater than the diameter of gear two.

[0012] Compared with the existing technology, the advantages of this spiral worm lever meter are:

[0013] In the utility model, when the external feeler rod is adjusted, the feeler rod drives the long rod to rotate, and the tooth plate rotates accordingly. The convex teeth on the tooth plate slide in the spiral groove of the spiral rod, driving the spiral rod to rotate. At this time, the rotating shaft rotates, and then through the transmission of gears one and two, it finally causes the pointer to deflect and indicate the corresponding reading. This lever-spiral transmission structure has relatively low assembly difficulty. There are no gears in the main transmission structure, so the phenomenon of table jamming is less likely to occur, and the return stroke accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the spiral worm type lever meter proposed by the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the spiral worm lever meter proposed by the utility model;

[0016] Figure 3 for Figure 2 Enlarged view of part A.

[0017] In the figure: 1 housing, 2 notch 1, 3 touch rod, 4 dial, 5 pointer, 6 notch 2, 7 fixed shaft, 8 long rod, 9 tooth plate, 10 screw rod, 11 bearing 1, 12 rotating shaft 1, 13 support rod, 14 spring piece 1, 15 spring piece 2, 16 notch 3, 17 gear 1, 18 gear 2. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1-Figure 3A spiral worm gear lever meter comprises a housing 1, a notch 2 is provided at the right end of the housing 1, the notch 2 is communicated with the interior of the housing 1, a fixed shaft 7 is fixedly connected to the inner wall of the notch 2, a long rod 8 is arranged inside the housing 1, the right end of the long rod 8 is rotatably sleeved on the outer wall of the fixed shaft 7, a touch rod 3 is fixedly connected to the right end of the long rod 8, the touch rod 3 is colinear with the long rod 8, the touch rod 3 is located on the outer side of the notch 2, the end of the touch rod 3 is smooth and is used to contact the surface to be measured, and a tooth plate 9 is fixedly connected to the left end of the long rod 8, and a plurality of convex teeth are evenly distributed on the outer wall of the tooth plate 9. The outer wall of the convex tooth is smooth and has rounded corners. The tooth plate 9 is arc-shaped, and the center of the tooth plate 9 is on the fixed axis 7. The upper side wall and the lower side wall of the shell 1 are respectively provided with a notch 2 6 and a notch 3 16. The notch 2 6 and the notch 3 16 match the tooth plate 9, so that the long rod 8 can drive the tooth plate 9 to rotate smoothly. The inner side wall of the shell 1 is fixedly connected with a spring piece 14 and a spring piece 2 15. The spring piece 14 and the spring piece 2 15 are located on the upper and lower sides of the long rod 8. The ends of the spring piece 14 and the spring piece 2 15 are squeezed and fitted with the outer side wall of the long rod 8 to ensure that the long rod 8 can automatically return.

[0020] A transmission mechanism is provided inside the housing 1 and is located on the left side of the toothed plate 9. The transmission mechanism includes a bearing 11 fixedly embedded in the upper and lower side walls of the housing 1. The inner side walls of the bearing 11 are fixedly inserted with a screw rod 10 located on the left side of the toothed plate 9. The spiral groove on the screw rod 10 matches the convex teeth on the toothed plate 9. Lubricating oil is applied to the spiral groove, and the spiral angle of the spiral groove is large, so that the convex teeth can push the inner side wall of the spiral groove to rotate the screw rod 10. The upper end of the screw rod 10 is fixedly connected to a rotating shaft 12, and the end of the rotating shaft 12 is fixedly sleeved with a gear 17.

[0021] The upper side wall of the housing 1 is provided with an indicating mechanism, which includes a plurality of support rods 13 fixedly connected to the upper side wall of the housing 1, the upper ends of the support rods 13 are commonly fixedly connected with a dial 4, a bearing 2 is fixedly embedded in the middle of the lower side wall of the dial 4, a rotating shaft 2 is fixedly inserted into the inner side wall of the bearing 2, a gear 2 18 located on the lower side of the dial 4 is fixedly sleeved at the lower end of the rotating shaft 2, the gear 2 18 is meshed with the gear 1 17, the diameter of the gear 1 17 is larger than the diameter of the gear 2 18, thereby magnifying the rotation angle of the spiral rod 10, and a pointer 5 located inside the dial 4 is fixedly sleeved at the upper end of the rotating shaft 2.

[0022] The working principle of the lever meter is as follows: the housing 1 is fixed so that the feeler rod 3 contacts the surface to be measured. When the surface to be measured is uneven, the feeler rod 3 jumps, and at this time, the long rod 8 jumps with the feeler rod 3 and drives the tooth plate 9 to rotate. The spring piece 1 14 and the spring piece 2 15 are squeezed alternately, and the convex teeth on the tooth plate 9 move up and down in the spiral groove, pushing the inner wall of the spiral groove to deflect the spiral rod 10. The deflected spiral rod 10 drives the rotating shaft 12 to rotate, the gear 17 rotates, and the gear 2 18 rotates at the same time. The rotating shaft 2 drives the pointer 5 to deflect through the rotation of the gear 2 18, causing the change of the indication. The transmission mode in which the convex teeth vertically push the spiral groove to rotate the spiral rod 10 reduces the difficulty of assembly. In addition, there is no gear transmission between the long rod 8 and the spiral rod 10, so the phenomenon of table jamming is less likely to occur. Under the action of the spring piece 14 and the spring piece 2 15, the return accuracy of the long rod 8 is also high.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A helical worm gear lever indicator, comprising a housing (1), characterized in that: The right end of the shell (1) is provided with a slot (2), the slot (2) is communicated with the interior of the shell (1), the inner side wall of the slot (2) is fixedly connected with a fixed shaft (7), the interior of the shell (1) is provided with a long rod (8), the right end of the long rod (8) is rotatably sleeved on the outer side wall of the fixed shaft (7), the right end of the long rod (8) is fixedly connected with a touch rod (3), the touch rod (3) and the long rod (8) are colinear, the touch rod (3) is located outside the slot (2), the left end of the long rod (8) is fixedly connected with a tooth plate (9), the outer side wall of the tooth plate (9) is evenly distributed with a plurality of convex teeth, the interior of the shell (1) is provided with a transmission mechanism located on the left side of the tooth plate (9), and the upper side wall of the shell (1) is provided with a number indicating mechanism.

2. The helical worm gear lever meter according to claim 1, characterized in that: The transmission mechanism comprises a bearing (11) fixedly embedded in the upper side wall and the lower side wall of the housing (1); a screw rod (10) located on the left side of the tooth plate (9) is fixedly inserted into the inner side wall of the bearing (11); the spiral groove on the screw rod (10) matches the convex teeth on the tooth plate (9); the upper end of the screw rod (10) is fixedly connected to a rotating shaft (12); and the end of the rotating shaft (12) is fixedly sleeved with a gear (17).

3. The helical worm gear lever meter according to claim 2, characterized in that: The indicating mechanism comprises a plurality of support rods (13) fixedly connected to the upper side wall of the housing (1); the upper ends of the support rods (13) are commonly fixedly connected to a dial (4); a second bearing is fixedly embedded in the middle of the lower side wall of the dial (4); a second rotating shaft is fixedly inserted into the inner side wall of the second bearing; a second gear (18) located on the lower side of the dial (4) is fixedly sleeved at the lower end of the second rotating shaft; the second gear (18) is meshed with a first gear (17); and a pointer (5) located inside the dial (4) is fixedly sleeved at the upper end of the second rotating shaft.

4. The helical worm gear lever meter according to claim 1, characterized in that: The tooth plate (9) is arc-shaped, and the center of the tooth plate (9) is on the fixed axis (7). The upper side wall and the lower side wall of the housing (1) are respectively provided with a second notch (6) and a third notch (16).

5. The helical worm gear lever meter according to claim 1, characterized in that: The inner side wall of the shell (1) is fixedly connected with a spring piece 1 (14) and a spring piece 2 (15), and the spring piece 1 (14) and the spring piece 2 (15) are located at the upper and lower sides of the long rod (8).

6. The helical worm gear lever meter according to claim 3, characterized in that: The diameter of the gear one (17) is greater than the diameter of the gear two (18).

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