Comprehensive dimension measuring device for engine connecting rod

Abstract

The utility model provides a comprehensive dimension measuring device for an engine connecting rod. Which comprises a machine body, a measuring base A, a measuring base B, a measuring mechanism and a center distance adjusting mechanism, and is characterized in that two linear sliding rails are arranged on the upper surface of the machine body in parallel, the measuring base A and the measuring base B are arranged on the linear sliding rails respectively, and a placing platform A and a placing platform B are correspondingly and fixedly arranged on the upper surfaces of the measuring base A and the measuring base B; measuring head protective covers are arranged in the centers of the surfaces above the placing platform A and the placing platform B, the two measuring head protective covers correspond to two inner holes of the engine connecting rod respectively, and measuring mechanisms are arranged in the two measuring head protective covers; according to the utility model, a plurality of groups of high-precision measuring heads are matched with the high-precision linear slide rail arranged below, so that more than ten key dimensions such as the dimensions of two inner holes, the center distance, the parallelism of a central shaft and the like of the engine connecting rod can be quickly and accurately measured, the requirement of quick full detection is met, and the device is small in occupied area, high in efficiency and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine parts detection, and specifically relates to a comprehensive size measuring device for engine connecting rod. BACKGROUND

[0002] The engine connecting rod is a core moving part of the internal combustion engine, and its machining precision directly affects the working performance and service life of the engine. In the traditional connecting rod manufacturing process, more than ten key dimensions such as the size of the head aperture, the center distance, and the parallelism of the center axis need to be detected, which puts extremely high requirements on the comprehensive detection capability of the measuring equipment.

[0003] At present, three-coordinate measuring machines are mainly used for precision detection in the industry, although the measurement accuracy can reach microns, but there are significant defects; for example, the equipment is bulky (usually 6-8 square meters), needs constant temperature and humidity environment, and the construction and maintenance cost is high; secondly, the measurement efficiency of the three-coordinate measuring machine is low, usually needs a long measurement period, and cannot meet the demand of rapid full inspection for mass production.

[0004] On the other hand, the traditional measuring device usually has a fixed measurement range, and the adjustment range of the measuring head is limited, which leads to poor adaptability and cannot meet the measurement needs of different types of engine connecting rods. With the diversification of engine models, the size and shape of the connecting rod also show diversity, and the traditional measuring device is difficult to realize one machine for multiple uses, leading enterprises to purchase multiple devices to meet the measurement needs of different products, further increasing the cost.

[0005] Therefore, the existing problems need to design a comprehensive size measuring device for engine connecting rod with small floor area, high measurement efficiency, low cost and capable of realizing rapid full inspection. At the same time, the device should have a large measurement range adjustment energy, be able to adapt to the measurement needs of different types of engine connecting rods, so as to realize one machine for multiple uses, improve the universality and adaptability of the equipment. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a comprehensive size measuring device for engine connecting rod to solve the problems raised in the background technology.

[0007] In order to achieve the above object, the utility model provides the following technical scheme: a kind of engine connecting rod comprehensive size measuring device, including body, measuring base A, measuring base B, measuring mechanism, center distance adjusting mechanism, it is characterized in that: the body upper surface is provided with two linear slide rails in parallel, measuring base A and measuring base B are respectively provided on the linear slide rail, measuring base A and measuring base B upper surface are fixedly provided with placing platform A and placing platform B correspondingly, the placing platform A and placing platform B upper surface center are provided with measuring head protective cover, the two measuring head protective covers are respectively corresponding to the two inner holes of engine connecting rod, and measuring mechanism is arranged in the two measuring head protective covers;

[0008] The center distance adjusting mechanism includes a center distance adjusting hand wheel, a gear and a rack, the center distance adjusting hand wheel is arranged on one side of the body close to the measuring base B, and a gear is arranged at the end point, the gear is engaged and driven by the rack above, and the rack is fixed to one end of the measuring base B.

[0009] Preferably, the measuring mechanism includes a measuring head position adjusting rod, a measuring head support and a high-precision measuring head, the measuring head position adjusting rod is arranged in the center of the measuring head protective cover, the measuring head support is arranged around the outer circumference of the measuring head position adjusting rod, and the high-precision measuring head is fixedly arranged above the measuring head support.

[0010] Preferably, the high-precision measuring head is a contact displacement sensor, and at least four groups of high-precision measuring heads are uniformly arranged around the outer circumference of the measuring head position adjusting rod, and each group is fixedly supported by the measuring head support below.

[0011] Preferably, the lower end surface of the measuring head support is arranged on a high-precision linear slide rail, and the high-precision linear slide rail is respectively arranged on the upper end surface of the measuring base A and the measuring base B.

[0012] Preferably, the center distance adjusting hand wheel driving gear is engaged and driven by the rack on one side of the measuring base B, so that the measuring base B moves on the linear slide rail, and the linear slide rail and the rack are arranged in parallel with each other.

[0013] Preferably, the measuring base A is fixed on both sides of the body by the fixed blocks.

[0014] The utility model has the advantages that:

[0015] The utility model discloses a high-precision linear slide rail is arranged below through multiple high-precision measuring heads, can fast, accurate measurement engine connecting rod's two inner hole size, center distance, center shaft parallelism etc. more than ten key size detection, realizes the requirement of fast full inspection, and the device occupies small, high efficiency, low cost, the guide rail adopts high-precision linear slide rail, ensures the accuracy and stability in the adjustment process, the center distance adjustment structure can conveniently adjust the two center distance size of measuring head through rotating center distance adjustment hand wheel, so that the requirement of the connecting rod measurement of different center distance is adapted. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is whole three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is measurement mechanism structure schematic diagram of the utility model;

[0018] Figure 3 It is center distance adjustment mechanism schematic diagram of the utility model.

[0019] The marking of each component in the drawing is as follows: 1: machine body, 2: measurement base A, 3: measurement base B, 4: placing platform A, 5: placing platform B, 6: measurement mechanism, 61: measurement position adjusting rod, 62: measuring head support, 63: high-precision measuring head, 7: center distance adjustment mechanism, 71: center distance adjustment hand wheel, 72: gear, 73: rack, 8: linear slide rail, 9: high-precision linear slide rail, 10: measuring head shield, 11: engine connecting rod, 12: fixed block DETAILED DESCRIPTION

[0020] Although the utility model can be described in relation to a particular application or industry, those skilled in the art will recognize a broader applicability of the utility model. Those of ordinary skill in the art will recognize that terms such as: above, below, upward, downward, etc. are used to describe the drawings and are not meant to limit the scope of the utility model as defined by the appended claims. Any numerical designations such as: first or second are merely illustrative and are not intended to limit the scope of the utility model in any way.

[0021] The utility model discloses a high-precision linear slide rail is arranged below through multiple high-precision measuring heads, can fast, accurate measurement engine connecting rod's two inner hole size, center distance, center shaft parallelism etc. more than ten key size detection, realizes the requirement of fast full inspection, and the device occupies small, high efficiency, low cost, the guide rail adopts high-precision linear slide rail, ensures the accuracy and stability in the adjustment process, the center distance adjustment structure can conveniently adjust the two center distance size of measuring head through rotating center distance adjustment hand wheel, so that the requirement of the connecting rod measurement of different center distance is adapted. Figure 1The device for measuring the comprehensive dimensions of an engine connecting rod includes a body 1, a measuring base A2, a measuring base B3, a measuring mechanism 6, and a center distance adjustment mechanism 7. Two linear slide rails 8 are arranged parallel to each other on the upper surface of the body 1. The measuring bases A2 and B3 are respectively mounted on the linear slide rails 8 for sliding. The measuring bases A2 are fixed to the sides of the body 1 by fixing blocks 12 on both sides to prevent the measuring bases A2 from moving on the linear slide rails 8. The upper surfaces of the measuring bases A2 and B3 are respectively fixedly mounted on a placement platform A4 and a placement platform B5. The placement platforms A4 and A5 are platforms supported by four support columns. The center of the upper surface of the placement platforms A4 and B5 is provided with a probe cover 10. The two probe covers 10 correspond to the two inner holes of the engine connecting rod 11, and the measuring mechanism 6 is installed inside the two probe covers 10.

[0022] like Figure 2 As shown: The measuring mechanism 6 includes a probe position adjustment rod 61, a probe bracket 62, and a high-precision probe 63. The probe position adjustment rod 61 is located at the center inside the probe protective cover 10. The probe position adjustment rod 61 is fixed at the center of the surfaces of the measuring base A and the measuring base B. The probe bracket 62 is arranged around the outer circle of the probe position adjustment rod 61. The high-precision probe 63 is fixedly arranged above the probe bracket 62. The high-precision probe 63 is a contact displacement sensor, and at least four sets of high-precision probes 63 are evenly arranged around the outer circle of the probe position adjustment rod 61 to collect radial displacement data of different cross-sections of the inner hole. When there are four sets of high-precision probes in the inner hole of a connecting rod... At position 63, the corresponding position data can be obtained. There are a total of eight sets of data for the inner holes of the two connecting rods. Similarly, as long as the high-precision probe 63 of each connecting rod inner hole is increased to eight sets (four sets at the top and four sets at the bottom), a total of sixteen sets of data can be obtained. This allows for the calculation of more than ten key dimensions such as the center distance of the connecting rods, the inner hole dimensions in two directions, and the parallelism of the central axis. Each set of high-precision probes 63 is fixedly supported by a probe bracket 62. The lower surface of the probe bracket 62 is set on the high-precision linear slide rail 9 to ensure the smooth movement of the high-precision probe. The high-precision linear slide rail 9 is respectively set on the upper surface of the measuring base A2 and the measuring base B3.

[0023] like Figure 3 As shown: The center distance adjustment mechanism 7 includes a center distance adjustment handwheel 71, a gear 72, and a rack 73. The center distance adjustment handwheel 71 drives the gear 72 at one end to mesh with the rack 73 on one side of the measuring base B3, causing the measuring base B3 to move on the linear slide rail 8, thereby driving the measuring mechanism 6 on the measuring base B3 to move and adjust the radial position of the high-precision probe 63 to adapt to the measurement requirements of engine connecting rod 11 with different inner hole sizes. After adjustment, it can be fixed by locking bolts.

[0024] The above-described embodiments only express the preferred embodiments of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications, improvements and substitutions can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A comprehensive dimension measuring device for engine connecting rods, comprising a body (1), a measuring base A (2), a measuring base B (3), a measuring mechanism (6), and a center distance adjustment mechanism (7), characterized in that: Two linear slide rails (8) are arranged parallel to each other on the upper surface of the body (1). Measurement base A (2) and measurement base B (3) are respectively arranged on the linear slide rails (8). Placement platform A (4) and placement platform B (5) are fixedly arranged on the upper surface of measurement base A (2) and measurement base B (3). Probe cover (10) is arranged at the center of the upper surface of placement platform A (4) and placement platform B (5). The two probe covers (10) correspond to the two inner holes of the engine connecting rod (11) respectively. Measurement mechanism (6) is arranged inside the two probe covers (10). The center distance adjustment mechanism (7) includes a center distance adjustment handwheel (71), a gear (72), and a rack (73). The center distance adjustment handwheel (71) is located on the side of the machine body (1) near the measuring base B (3), and the end is provided with a gear (72). The gear (72) meshes with the rack (73) for transmission. The rack (73) is fixed to one end of the measuring base B (3).

2. The engine connecting rod comprehensive dimension measuring device as described in claim 1, characterized in that: The measuring mechanism (6) includes a probe position adjustment rod (61), a probe bracket (62), and a high-precision probe (63). The probe position adjustment rod (61) is located at the center inside the probe cover (10). The probe bracket (62) is located around the outer circle of the probe position adjustment rod (61). The high-precision probe (63) is fixedly located above the probe bracket (62).

3. The engine connecting rod comprehensive dimension measuring device as described in claim 2, characterized in that: The high-precision probe (63) is a contact displacement sensor. At least four sets of high-precision probes (63) are evenly arranged around the outer circle of the probe position adjustment rod (61), and each set is fixedly supported by a probe bracket (62).

4. The engine connecting rod comprehensive dimension measuring device as described in claim 2, characterized in that: The lower surface of the probe bracket (62) is set on the high-precision linear slide rail (9), and the high-precision linear slide rail (9) is respectively set on the upper surface of the measuring base A (2) and the measuring base B (3).

5. The engine connecting rod comprehensive dimension measuring device as described in claim 1, characterized in that: The center distance adjustment handwheel (71) drives the gear (72) to mesh with the rack (73) on one side of the measuring base B (3), so that the measuring base B (3) moves on the linear slide rail (8), and the linear slide rail (8) and the rack (73) are arranged parallel to each other.

6. The engine connecting rod comprehensive dimension measuring device as described in claim 1, characterized in that: The measuring base A (2) is fixed to the two sides of the machine body (1) by fixing blocks (12).

Images