Special appliance for detecting verticality of pin hole of compressor piston
By designing a testing instrument that includes a dial indicator, a V-block, and a limiting rod, the problems of piston surface scratches and inaccurate measurement in piston pin hole perpendicularity testing were solved, enabling accurate measurement and low-wear testing of pistons of different sizes.
Patent Information
- Application Number
- CN202520331665.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-02-27
AI Technical Summary
Existing compressor piston pin hole perpendicularity testing tools are prone to scratching the piston surface during measurement and have poor measurement accuracy, especially when measuring pistons of different sizes, making operation inconvenient.
A special testing instrument was designed, comprising a dial indicator, a base plate, a V-block, a vertical plate, a limiting rod, and a mandrel. The piston is positioned by the V-block, the piston is fixed by the limiting rod, and the mandrel is rotated to measure the perpendicularity of the piston pin hole, thus avoiding measurement errors caused by uneven force.
It enables simple adjustment and fixation of pistons of different sizes, improves measurement accuracy, reduces piston surface wear, and ensures measurement accuracy.
Smart Images
Figure CN223610766U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to piston pin hole detection technical field, concretely is a special appliance for compressor piston pin hole perpendicularity detection. BACKGROUND
[0002] At present, the known piston pin hole perpendicularity detection gauge, its measurement mode is: moving the piston to the measurement position, observing the difference of the dial gauge reading through the measurement of both sides, to determine the perpendicularity of the pin hole. However, this measurement mode has inherent defects, and it is inconvenient to operate when measuring different sizes of pistons, and the piston surface is easily scratched during the process of moving the piston to the measurement position. When the measuring instrument is used, the measurement value is easily deviated due to the difference in the force of pushing the piston each time. UTILITARY MODEL
[0003] (I) Technical problem solved
[0004] In view of the defects of the prior art, the utility model provides a special appliance for compressor piston pin hole perpendicularity detection, which solves the problems of easy scratching of the piston surface and poor accuracy of measurement.
[0005] (II) Technical scheme
[0006] In order to achieve the above purpose, the utility model provides the following technical scheme: a special appliance for compressor piston pin hole perpendicularity detection, comprising a dial gauge, a bottom plate and a piston, the top of the bottom plate is provided with a V-shaped frame for positioning the piston, the top of the bottom plate is provided with a vertical plate, the nut is installed on the front side wall of the vertical plate and located inside the V-shaped frame, the limiting rod is installed in the nut through the vertical plate, the dial gauge is installed with the vertical plate through the screw, the core rod for measuring the perpendicularity of the piston is transversely arranged in the V-shaped frame, and the core rod is connected with the dial gauge.
[0007] Preferably, the top of the V-shaped frame is provided with a V-shaped groove, and the included angle of the V-shaped groove is °.
[0008] Preferably, the edges of the top surface of the V-shaped frame are chamfered.
[0009] Preferably, the bottom of the V-shaped frame is provided with a screw hole, and the surface of the bottom plate is provided with a matching screw hole, and the V-shaped frame is installed on the surface of the bottom plate through the screw hole.
[0010] Preferably, the V-shaped frame is provided with a gap at the middle position for height adjustment of the core rod.
[0011] Preferably, the height of the V-shaped frame is 30mm, and the width of the V-shaped frame is 50mm.
[0012] Preferably, the diameter of the mandrel is 7 mm.
[0013] Compared with the prior art, the utility model provides a special appliance for detecting perpendicularity of a compressor piston pin hole, which has the following beneficial effects:
[0014] 1、 the special appliance for detecting perpendicularity of a compressor piston pin hole, the piston that needs to be measured is placed in the V type groove above the V type frame, then the length of the limiting rod inserted into the V type frame is adjusted to quickly fix the piston, and when measuring pistons of different sizes, the adjustment operation is simple, and pistons of various models can be measured.
[0015] 2、 the special appliance for detecting perpendicularity of a compressor piston pin hole, by adopting the mode of rotating the piston to measure, the problem of inaccurate measurement caused by uneven force when pushing the piston is effectively avoided, the measurement accuracy is improved, and the wear on the surface of the piston during the measurement of the perpendicularity of the piston pin hole is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a structure top view of the utility model;
[0017] Figure 2 It is a left side structure schematic view of the utility model;
[0018] Figure 3 It is a V type frame structure front view of the utility model;
[0019] Figure 4 It is a structure top view of the utility model Figure 3 It is a structure top view of the utility model
[0020] Wherein: 1, screw; 2, dial indicator; 3, vertical plate; 4, limiting rod; 5, nut; 6, V type frame; 7, piston; 8, mandrel; 9, bottom plate. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0022] Please refer to Figures 1-4The utility model provides a kind of compressor piston pin hole perpendicularity detection special appliance, including dial gauge 2, bottom plate 9 and piston 7, the top of bottom plate 9 is equipped with V-shaped frame 6 for positioning piston 7, the top of bottom plate 9 is equipped with vertical board 3, nut 5 is installed in the front side wall of vertical board 3 and the position inside V-shaped frame 6, limit rod 4 is installed in the inside of nut 5 by passing through vertical board 3, dial gauge 2 is installed by screw 1 with vertical board 3, for measuring the core rod 8 of piston 7 perpendicularity is transversely set in V-shaped frame 6 inside, and core rod 8 is connected with dial gauge 2.
[0023] Further, the top of V-shaped frame 6 is provided with V-shaped groove, the included angle of V-shaped groove is 90 °, and different diameter pistons 7 can be assisted and supported and positioned by V-shaped groove.
[0024] Further, the edges of the top surface of V-shaped frame 6 are chamfered to reduce burrs and prevent scratches on the surface of the piston 7 during use.
[0025] Further, screw holes are formed in the bottom of V-shaped frame 6, and screw holes are formed in the surface of bottom plate 9, and V-shaped frame 6 is installed on the surface of bottom plate 9 by screwing through the screw holes.
[0026] Further, a gap is reserved in the middle position of V-shaped frame 6 for height adjustment of the core rod 8, the core rod 8 extends into the inside of V-shaped frame 6 through the gap, and the piston 7 clamped in the inside of V-shaped frame 6 is measured to meet the movement requirements of the core rod 8 during work.
[0027] Further, the height of V-shaped frame 6 is 30 mm, and the width of V-shaped frame 6 is 50 mm.
[0028] Further, the diameter of the core rod 8 is 7 mm.
[0029] In use, the piston 7 to be measured is placed in the V-shaped groove above the V-shaped frame 6, then the limit rod 4 is rotated, the limit rod 4 moves forward under the limitation of the threads of the nut 5, the piston 7 is fixed by the front end of the limit rod 4, and the core rod 8 is controlled to enter the measurement position of the piston 7, then the piston 7 is rotated, the perpendicularity of the piston pin hole is detected by the core rod 8, the detected perpendicularity value of the piston pin hole is transmitted to the dial gauge 2 by the core rod 8, and the perpendicularity of the piston pin hole can be obtained by reading and observing the value change of the dial gauge 2.
[0030] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A special instrument for testing the perpendicularity of compressor piston pin holes, comprising a dial indicator (2), a base plate (9), and a piston (7), characterized in that: The top of the base plate (9) is equipped with a V-shaped bracket (6) for positioning the piston (7). The top of the base plate (9) is equipped with a vertical plate (3). A nut (5) is installed on the front side wall of the vertical plate (3) and located inside the V-shaped bracket (6). A limiting rod (4) passes through the vertical plate (3) and is installed inside the nut (5). The dial indicator (2) is installed to the vertical plate (3) by a screw (1). A mandrel (8) for measuring the verticality of the piston (7) is horizontally arranged inside the V-shaped bracket (6). The mandrel (8) is connected to the dial indicator (2).
2. The special instrument for detecting the perpendicularity of compressor piston pin holes according to claim 1, characterized in that: The top of the V-shaped frame (6) is provided with a V-shaped groove, and the included angle of the V-shaped groove is (90)°.
3. A special instrument for detecting the perpendicularity of compressor piston pin holes according to claim 2, characterized in that: The edges of the top surface of the V-shaped frame (6) are all chamfered.
4. A special instrument for detecting the perpendicularity of compressor piston pin holes according to claim 1, characterized in that: The bottom of the V-shaped frame (6) is provided with screw holes, and the surface of the base plate (9) is provided with matching screw holes. The V-shaped frame (6) is installed on the surface of the base plate (9) by passing bolts through the screw holes.
5. A special instrument for detecting the perpendicularity of compressor piston pin holes according to claim 1, characterized in that: The V-shaped frame (6) has a gap reserved in the middle for supplying the mandrel (8) for height adjustment.
6. A special instrument for detecting the perpendicularity of compressor piston pin holes according to claim 4, characterized in that: The height of the V-shaped frame (6) is 30mm, and the width of the V-shaped frame (6) is 50mm.
7. A special instrument for detecting the perpendicularity of compressor piston pin holes according to claim 1, characterized in that: The diameter of the core rod (8) is 7 mm.