Measuring mechanism for bottom diameter of inner groove of cylinder sleeve

Abstract

The utility model discloses a mechanism for measuring the bottom diameter of an inner groove of a cylinder sleeve, which relates to the technical field of measuring instruments and comprises a bottom plate, a fixed block and a guide rail are fixedly arranged at the upper end of the bottom plate side by side along the length direction, a sliding block is slidably connected onto the guide rail, and a movable block is fixedly arranged at the upper end of the sliding block. The movable block and the fixed block are fixedly provided with a probe for measuring the bottom diameter of the inner groove of the cylinder sleeve, and the probe is arranged on one side of the opposite surfaces of the movable block and the fixed block; a cover cap is fixedly arranged at the upper end of the bottom plate, the fixed block and the movable block are covered with the cover cap, and the probe penetrates through a top cover of the cover cap; a dial gauge used for displaying the size of the bottom diameter of the inner groove of the cylinder sleeve is fixedly installed on the cover cap. According to the utility model, the dial gauge provided with the dial plate is adopted to accurately and rapidly read a measurement result, so that the measurement efficiency of the bottom diameter of the cylinder sleeve is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring instruments, and particularly relates to a measuring mechanism for the bottom diameter of the inner groove of a cylinder liner. Background Technique

[0002] The cylinder liner of a power tool, also known as a cylinder sleeve, is a key component in a power tool, especially in certain types of power tools such as a rotary hammer. The cylinder liner of a power tool is a protective sleeve inside the power tool, usually located in the cylinder block or engine block, and is used to accommodate the reciprocating motion of the piston. The cylinder liner is usually made of an alloy material with good wear resistance, corrosion resistance, and thermal conductivity, and is processed after casting.

[0003] The main function of the cylinder liner is to protect the inner wall of the cylinder of the power tool, preventing it from being worn and damaged due to the movement of the piston. The cylinder liner forms a sealing ring groove to separate the piston from the cylinder wall, preventing gas leakage and fuel entry, and improving the efficiency and performance of the power tool. The cylinder liner bears the weight and pressure of the piston, ensuring the stable movement of the piston in the cylinder. The cylinder liner can effectively transfer the heat of the piston assembly and itself to the cooling water, regulating the working temperature of the power tool and improving its working efficiency.

[0004] There are various types of materials for cylinder liners, and different materials have different physical properties and prices. Cast iron and aluminum alloy are common cylinder liner materials. Cast iron cylinder liners have excellent wear resistance, while aluminum alloy cylinder liners are lighter but may be more prone to deformation and wear.

[0005] The cylinder liner is indispensable for the normal operation and performance improvement of the power tool. Its quality and performance directly affect the power and service life of the power tool. Therefore, very strict requirements are imposed on the dimensional tolerance and geometric tolerance of the cylinder liner, and the inner diameter of the cylinder liner is a very important parameter. Traditional inner diameter measurement requires a specialized inspector to use a vernier caliper or micrometer for measurement. Manual measurement has a large workload, and it can neither comprehensively measure the inner diameter of the entire circumferential surface of the cylinder liner nor accurately measure the geometric tolerance of the cylinder liner, and the work efficiency is low. Content of the Utility Model

[0006] The purpose of the utility model is to provide a measuring mechanism for the bottom diameter of the inner groove of a cylinder liner to solve the technical problem of low efficiency in measuring the inner diameter of the cylinder liner.

[0007] The purpose of the utility model can be realized by the following technical solutions:

[0008] A measuring mechanism for the bottom diameter of the inner groove of a cylinder liner, including a bottom plate. Along the length direction at the upper end of the bottom plate, a fixed block and a guide rail are fixedly arranged side by side. A slider is slidably connected to the guide rail. An activity block is fixedly arranged at the upper end of the slider. Measuring needles for measuring the bottom diameter of the inner groove of the cylinder liner are fixedly installed on the activity block and the fixed block, and the measuring needles are installed on one side of the opposite surfaces of the activity block and the fixed block. A cover is fixedly arranged at the upper end of the bottom plate, and the cover covers the outside of the fixed block and the activity block. The measuring needles penetrate through the top cover of the cover. An indicating meter for displaying the size of the bottom diameter of the inner groove of the cylinder liner is fixedly installed on the cover.

[0009] As a further scheme of the utility model: The measuring needle includes a measuring needle seat. A semi-circular measuring rod is fixedly arranged at the upper end of the measuring needle seat, and a limiting plate is detachably installed at the upper end of the semi-circular measuring rod.

[0010] As a further scheme of the utility model: The indicating meter includes a connecting rod fixedly installed on the side wall of the cover. One end of the connecting rod is fixedly provided with a dial, and a detection probe is connected to the dial. The detection probe penetrates through the connecting rod and abuts against the slider.

[0011] As a further scheme of the utility model: A driving member for driving the slider to slide is arranged inside the cover.

[0012] As a further scheme of the utility model: The driving member includes a driving rod fixedly installed on the slider, and a driving groove matched with the driving rod is arranged on the side wall of the cover.

[0013] As a further scheme of the utility model: The driving member further includes a spring. One end of the spring is fixedly connected to the fixed block, and the other end is fixedly connected to the slider.

[0014] As a further scheme of the utility model: The driving member includes a bearing seat fixedly installed on the side of the fixed block away from the slider. A driving shaft is fixedly installed in the bearing of the bearing seat. A driving handle is fixedly arranged at one end of the driving shaft, and a driving screw rod is fixedly connected to the other end of the driving shaft. The driving screw rod penetrates through the fixed block and is in threaded connection with the slider.

[0015] The beneficial effects of the utility model:

[0016] (1) Before measuring the bottom diameter of the cylinder liner, calibrate the indicating meter with a standard ring gauge to determine the standard size of the bottom diameter of the cylinder liner. Then, sleeved the bottom diameter of the cylinder liner to be measured outside the two groups of measuring needles. Subsequently, the two groups of measuring needles press against the inner diameter of the bottom diameter of the cylinder liner, and the current measurement result is displayed on the dial. By comparing with the standard size, the difference from the measurement result of the standard ring gauge is obtained, and further the measured value of the bottom diameter of the inner groove of the cylinder liner is obtained, ensuring the measurement accuracy of the bottom diameter of the cylinder liner.

[0017] (2)The cylinder liner to be measured is limited by the limit plate to ensure its stability during measurement. Both measuring needles are semi-circular structures, enabling better fitting with the bottom diameter of the inner groove of the cylinder liner when measuring it, thereby ensuring the accuracy of the measurement of the bottom diameter of the inner groove of the cylinder liner.

[0018] (3)An indicating gauge with a dial is used to accurately and quickly read the measurement results, effectively improving the measurement efficiency of the bottom diameter of the cylinder liner. Brief Description of the Drawings

[0019] The following further describes the present utility model with reference to the accompanying drawings.

[0020] Figure 1 is a schematic structural diagram of the whole of the present utility model;

[0021] Figure 2 is a three-dimensional structural diagram of the interior of the whole of the present utility model;

[0022] Figure 3 is an axonometric structural diagram of the interior of the whole of the present utility model;

[0023] Figure 4 is a sectional structural diagram of the whole of the present utility model;

[0024] Figure 5 is a schematic installation structure diagram of the drive shaft of the present utility model;

[0025] Figure 6 is a sectional structural diagram of the installation of the drive screw of the present utility model.

[0026] In the figures: 1, base plate; 2, fixed block; 21, through hole; 3, measuring needle; 31, measuring needle seat; 32, semi-circular measuring rod; 33, limit plate; 4, movable block; 5, slider; 51, sliding hole; 52, threaded seat; 6, guide rail; 7, indicating gauge; 71, dial; 72, connecting rod; 73, detection probe; 8, spring; 9, cover; 91, guide groove; 92, drive groove; 93, avoidance groove; 10, drive rod; 11, bearing seat; 12, drive shaft; 13, drive handle; 14, drive screw. Detailed Embodiment

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0028] Please refer to Figures 1 - 6As shown in the figure, the utility model relates to a measuring mechanism for the bottom diameter of the inner groove of a cylinder liner, which includes a bottom plate 1. Along the length direction, a fixed block 2 and a guide rail 6 are fixedly arranged side by side at the upper end of the bottom plate 1. A slider 5 is slidably connected to the guide rail 6. A movable block 4 is fixedly arranged at the upper end of the slider 5. Measuring needles 3 for measuring the bottom diameter of the inner groove of the cylinder liner are fixedly installed on the movable block 4 and the fixed block 2. The measuring needles 3 are installed on one side of the opposite surfaces of the movable block 4 and the fixed block 2. A cover 9 is fixedly arranged at the upper end of the bottom plate 1. The cover 9 covers the outside of the fixed block 2 and the movable block 4. The measuring needles 3 penetrate through the top cover of the cover 9. A guiding groove 91 for avoiding the measuring needles 3 is arranged at the upper end of the cover 9. An indicating meter 7 for displaying the size of the bottom diameter of the inner groove of the cylinder liner is fixedly installed on the cover 9.

[0029] The measuring needle 3 includes a measuring needle seat 31. A semi-circular measuring rod 32 is fixedly arranged at the upper end of the measuring needle seat 31. A limiting plate 33 is detachably installed at the upper end of the semi-circular measuring rod 32. The cylinder liner to be measured is limited by the limiting plate 33 to ensure the stability of the cylinder liner during measurement. And both of the two measuring needles 3 are semi-circular structures, so that when measuring the bottom diameter of the inner groove of the cylinder liner, they can fit more closely with the bottom diameter of the inner groove, thereby ensuring the accuracy of the measurement of the bottom diameter of the inner groove of the cylinder liner.

[0030] The indicating meter 7 includes a connecting rod 72 fixedly installed on the side wall of the cover 9. A dial 71 is fixedly arranged at one end of the connecting rod 72. A detection probe 73 is connected to the dial 71. The detection probe 73 penetrates through the connecting rod 72 and abuts against the slider 5.

[0031] A driving member for driving the movable block 4 to slide is arranged inside the cover 9. The movable block 4 is driven to slide by the driving member, so as to adjust the distance between the two groups of measuring needles 3 and realize the rapid measurement of the bottom diameter of the inner groove of the cylinder liner.

[0032] The driving member includes a driving rod 10 fixedly installed on the slider 5. A driving groove 92 matched with the driving rod 10 is arranged on the side wall of the cover 9. The driving member further includes a spring 8. One end of the spring 8 is fixedly connected to the fixed block 2, and the other end is fixedly connected to the slider 5.

[0033] When it is necessary to measure the bottom diameter of the cylinder liner, first, the measuring needle 3 located on the movable block 4 is driven by the driving rod 10 to move towards the fixed block 2. The cylinder liner is sleeved on the two groups of measuring needles 3. Then the driving rod 10 is released. Under the elastic action of the spring 8, the movable block 4 slides along the guide rail 6. The two groups of measuring needles 3 are clamped on both sides of the bottom diameter of the cylinder liner. At the same time, the movable block 4 presses the detection probe 73 on the indicating meter 7, and the measurement result of the bottom diameter of the cylinder liner is displayed on the dial 71.

[0034] One side of the cover 9 is provided with an avoidance groove 93 for avoiding the fixed block 2, so as to ensure that the drive shaft 12 can stably drive the slider 5 to translate. The driving member includes a bearing seat 11 fixedly installed on the side of the fixed block 2 away from the slider 5. A drive shaft 12 is fixedly installed inside the bearing of the bearing seat 11. One end of the drive shaft 12 is fixedly provided with a drive handle 13, and the other end of the drive shaft 12 is fixedly connected to a drive screw 14. The drive screw 14 passes through the fixed block 2 and is threadedly connected to the slider 5. A through hole 21 matching the drive screw 14 is provided on the fixed block 2, and a sliding hole 51 for the drive screw 14 to pass through is provided on the slider 5. A threaded seat 52 threadedly connected to the drive screw 14 is fixedly installed at the notch of the sliding hole 51.

[0035] The working principle of the present invention: Select whether to use the spring 8 in cooperation with the drive rod 10 or the drive screw 14 to drive the sliding of the movable block 4 according to actual needs. Before measuring the bottom diameter of the cylinder liner, calibrate the indicating gauge 7 with a standard ring gauge to determine the standard size of the bottom diameter of the cylinder liner. Then, put the bottom diameter of the cylinder liner to be measured on the outside of the two sets of measuring needles 3. Subsequently, the two sets of measuring needles 3 are pressed against the inner diameter of the bottom diameter of the cylinder liner, and the current measurement result is displayed on the dial 71. By comparing with the standard size, the difference from the measurement result of the standard ring gauge is obtained, and further the measured value of the inner groove bottom diameter of the cylinder liner is obtained.

[0036] The above has described in detail an embodiment of the present invention, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the implementation scope of the present invention. All equal changes and improvements made according to the scope of the present invention application should still fall within the patent coverage scope of the present invention.

Claims

1. A measuring mechanism for the bottom diameter of the inner groove of a cylinder liner, characterized in that, It includes a bottom plate (1). Along the length direction, a fixed block (2) and a guide rail (6) are fixedly arranged side by side at the upper end of the bottom plate (1). A slider (5) is slidably connected to the guide rail (6). An activity block (4) is fixedly arranged at the upper end of the slider (5). A measuring needle (3) for measuring the bottom diameter of the inner groove of the cylinder liner is fixedly installed on the activity block (4) and the fixed block (2). The measuring needle (3) is installed on one side of the opposite surfaces of the activity block (4) and the fixed block (2). A cover (9) is fixedly arranged at the upper end of the bottom plate (1). The cover (9) covers the outside of the fixed block (2) and the activity block (4). The measuring needle (3) penetrates through the top cover of the cover (9). An indicating gauge (7) for displaying the size of the bottom diameter of the inner groove of the cylinder liner is fixedly installed on the cover (9). A driving member for driving the activity block (4) to slide is arranged inside the cover (9). The driving member includes a driving rod (10) fixedly installed on the slider (5). A driving groove (92) matching with the driving rod (10) is arranged on the side wall of the cover (9). The driving member further includes a spring (8). One end of the spring (8) is fixedly connected to the fixed block (2), and the other end is fixedly connected to the slider (5).

2. The measuring mechanism for the bottom diameter of the inner groove of a cylinder liner according to claim 1, characterized in that, The measuring needle (3) includes a measuring needle seat (31). A semi-circular measuring rod (32) is fixedly arranged at the upper end of the measuring needle seat (31). A limiting plate (33) is detachably installed at the upper end of the semi-circular measuring rod (32).

3. The measuring mechanism for the bottom diameter of the inner groove of a cylinder liner according to claim 1, characterized in that, The indicating gauge (7) includes a connecting rod (72) fixedly installed on the side wall of the cover (9). A dial (71) is fixedly arranged at one end of the connecting rod (72). A detection probe (73) is connected to the dial (71). The detection probe (73) penetrates through the connecting rod (72) and abuts against the slider (5).

4. A measuring mechanism for the bottom diameter of the inner groove of a cylinder liner according to claim 1, characterized in that, The driving member includes a bearing seat (11) fixedly installed on the side of the fixed block (2) away from the slider (5). A driving shaft (12) is fixedly installed in the bearing of the bearing seat (11). A driving handle (13) is fixedly arranged at one end of the driving shaft (12). A driving screw rod (14) is fixedly connected to the other end of the driving shaft (12). The driving screw rod (14) penetrates through the fixed block (2) and is in threaded connection with the slider (5).

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