Gauge for detecting boundary dimension of rotary hammer

Abstract

The invention discloses a gauge for detecting the boundary dimension of a rotary driving hammer, and the gauge is reliable in positioning and can visually and accurately detect the boundary dimension of the driving hammer. A driving hammer is arranged in the device and is positioned, and then the boundary dimension of the driving hammer is detected by using a step leveling ruler. The height of the step leveling ruler is the dimensional tolerance range of the appearance of the driving hammer, when the driving hammer in the tolerance range is detected by using the step leveling ruler, a knife edge on one side of the driving hammer leaks light, and the driving hammer is judged to be qualified, otherwise, when the driving hammer is not machined to be qualified, a part on one side of the gauge leaks light, and the driving hammer is judged to be unqualified.

Description

Technical Field

[0001] The invention relates to the technical field of measuring devices, in particular to a gauge for detecting the external dimensions of a rotary hammer. Background Art

[0002] The dimensions of the hammer directly affect the movement speed of the automatic machine, the striking speed of the firing pin and the reliability of the mechanism. Abnormal hammer dimensions will directly cause the product to lose its function and cause serious quality problems.

[0003] Some special products use a rotary hammer, while the original replacement products use a translational hammer, and the gauge structure has no reference value. At the same time, the rotary hammer has an irregular shape, the measured elements are scattered, and the measurement reference and the measured elements are located in different planes, so it cannot be tested with universal gauges such as calipers or micrometers. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a gauge for detecting the external dimensions of a rotary hammer. The gauge involved in the present invention has reliable positioning and can intuitively and accurately detect the external dimensions of the hammer.

[0005] The object of the present invention is achieved in that:

[0006] A gauge for detecting the external dimensions of a rotary hammer, characterized in that it comprises a measuring seat (1), a positioning block (2) and a positioning pin (3) are provided on the measuring seat (1), a pad (6) is provided between the measuring seat (1) and the positioning block (2), a measuring block (7) is provided at the end of the positioning block (2) adjacent to the positioning pin (3), the lower surface of the measuring block (7) is flush with the lower surface of the positioning block (2), a limiting boss (8) is provided at the lower end of the measuring block (7), and the limiting boss (8) protrudes downward from the lower surfaces of the measuring block (7) and the positioning block (2);

[0007] The positioning pin is used to insert into the main reference hole of the hammer for positioning; the inner side elevation of the limiting boss (8) is used to position the hammer circumferentially; the lower surface of the positioning block (2) is used to limit the hammer vertically;

[0008] The right end face of the measuring block (7) is face bc, and the distance from the axis of the positioning pin (3) to face bc is dimension C, which corresponds to the distance between the main reference hole of the hammer and the starting point of the sear.

[0009] The front end surface of the measuring block (7) is surface ab, and the distance from the axis of the positioning pin (3) to the surface ab is dimension D, and the dimension D corresponds to the distance between the main reference hole of the hammer and the sear hanging surface;

[0010] The right end surface of the measuring seat (1) is surface ef, and the distance from the axis of the positioning pin (3) to the surface ef is dimension E. Dimension E corresponds to the distance between the main reference hole of the hammer and the striking surface of the hammer.

[0011] The lower right end of the measuring seat (1) is provided with an inclined surface hi and an inclined surface gh, and the inclined surface hi and the inclined surface gh form a stepped surface. The distance from the axis of the positioning pin (3) to the surface hi is dimension G, and the dimension G corresponds to the distance between the main reference hole of the hammer and the surface of the in-place safety hook. The distance from the axis of the positioning pin (3) to the surface gh is dimension H, and the dimension H corresponds to the distance between the main reference hole of the hammer and the starting point of the in-place safety hook.

[0012] After the hammer is positioned on the measuring seat, the height difference between each surface of the measuring seat and the corresponding measuring surface of the hammer is measured by a measuring device. If the height difference meets the tolerance requirement, the appearance of the hammer is qualified.

[0013] The measuring device is provided with a step surface for measuring, a positioning surface in the step surface contacts a measuring seat (1), and a detection surface in the step surface faces a corresponding measuring surface of the hammer.

[0014] During the inspection, the inspection surface and the hammer measuring surface do not contact each other, and bright light is visible between the inspection surface and the hammer measuring surface, which indicates that the position size of the hammer measuring surface does not exceed the required tolerance band width and the part is qualified.

[0015] Furthermore, the measuring seat (1) and the positioning block (2) are positioned by means of a connecting pin (4) and fastened by means of a screw (5); the positioning pin (3) and the measuring seat (1) are fastened by means of metal glue.

[0016] Furthermore, the inner side vertical surface of the limiting boss (8) is an inclined surface, and the inclined surface is used to fit and position the hammer.

[0017] Furthermore, the measuring device adopts a stepped ruler, which has a measuring edge, a measuring protrusion (9) is provided at one end of the measuring edge, a step is formed between the measuring protrusion (9) and the end face of the measuring edge of the stepped ruler, and a measuring tooth (10) is provided at the other end of the measuring edge, a step is formed between the measuring tooth (10) and the end face of the measuring edge of the stepped ruler, the height of the two steps is I, I is the width of the tolerance zone of each size of the hammer shape, and the measuring protrusion and the measuring tooth are used respectively according to the shape of each measuring surface of the hammer.

[0018] Due to the adoption of the above technical solution, the present invention converts the measurement elements of the rotary hammer to the same gauge, which is convenient for joint measurement. The key point is that the design datum, processing positioning datum and positioning datum of the hammer part are unified with the positioning datum of the gauge. All dimensions can be measured once for positioning, thus avoiding the error caused by repeated positioning. The present invention has the following beneficial effects:

[0019] The gauge of the present invention effectively overcomes the problem that the hammer of a new type of special product has an irregular shape, the measured elements are scattered, and the measurement reference and the measured elements are located in different planes, and general gauges such as calipers or micrometers cannot be used for detection. It also solves the problem that existing gauges cannot be used for hammer detection of this type of product. At the same time, the gauge involved in the present invention has reliable positioning and can intuitively, accurately and quickly detect the external dimensions of the hammer. While improving the actual detection efficiency, it ensures the reliability of the product and avoids serious quality problems caused by the loss of function of a new type of special product.

[0020] The device of the present invention can accurately detect the external dimensions of the hammer. The detection gauge of the present invention comprises a positioning block, a positioning pin and a measuring seat. The positioning pin is inserted into the hammer to be tested, and the hammer is rotated clockwise to complete the positioning. The hammer detection is completed by using it in conjunction with a step ruler.

[0021] The detection gauge of the present invention effectively solves the problem that the hammer of the new product cannot be detected using the existing or universal gauge. The gauge can quickly and intuitively determine whether the hammer's external dimensions are qualified, and is suitable for the batch processing and acceptance process of the hammer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 1 In the figure, dimensions A, B, and F are the positioning dimensions of the workpiece on the measuring tool, and the measured dimensions of the workpiece are C, D, E, G, and H. Dimension A is smaller and is not obvious in the figure.

[0024] Figure 2 It is a structural diagram of a step level ruler;

[0025] Figure 3 , Figure 4 This is a schematic diagram of the positioning of the hammer;

[0026] Figures 5 to 9 It is a schematic diagram of the use of the present invention.

[0027] Reference numerals

[0028] In the attached drawings, 1 is a measuring seat; 2 is a positioning block; 3 is a positioning pin; 4 is a connecting pin; 5 is a screw; 6 is a pad; 7 is a measuring block; 8 is a limiting boss, 9 is a measuring protrusion, and 10 is a measuring tooth. DETAILED DESCRIPTION

[0029] A gauge for detecting the external dimensions of a rotary hammer comprises a positioning block, a positioning pin and a measuring seat. Its main features are:

[0030] a. The locating pin in the detection gauge is inserted into the main reference hole of the hammer when in use to limit the freedom of the hammer in the X and Y directions.

[0031] b. After the hammer is installed in the positioning shaft, rotate it 90 degrees clockwise to contact the positioning block, which limits the rotational freedom of the hammer and completes the positioning. At the same time, the inner cavity formed by the positioning block and the measuring seat limits the freedom of the hammer in the Z direction.

[0032] The measuring seat in the inspection gauge is designed to imitate the shape of the hammer. The hammer is installed in this gauge and positioned, and then the size of the hammer is inspected using a step ruler. The height of the step ruler is the size tolerance range of the hammer shape. When a hammer within the tolerance range is inspected using a step ruler, if the blade on one side of the hammer leaks light, it is considered qualified. On the contrary, when the hammer is processed unqualified, the part on one side of the gauge leaks light, and it is considered unqualified.

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] When implementing it, Figure 1 As shown, a gauge for detecting the external dimensions of a rotary hammer comprises a positioning block 2, a positioning pin 3 and a measuring seat 1.

[0035] A gauge for detecting the external dimensions of a rotary hammer.

[0036] (1) The measuring seat 1 and the positioning block 2 are positioned by the connecting pin 4 and fastened by the screw 5. The positioning pin 3 and the measuring seat 1 are fastened by metal glue.

[0037] (2) After the positioning pin 3 and the positioning block 2 are connected through the measuring seat 1, the positioning dimensions A and B are formed, that is, the position of the main positioning surface is determined; the positioning dimension F is formed, which limits the displacement of the hammer in the width direction after positioning.

[0038] (3) After assembly, dimension C is formed, namely surface bc, which is used to detect the position of the starting point of the hammer and the sear.

[0039] (4) After assembly, dimension D is formed, namely surface ab, which is used to detect the position of the hammer and the sear hanging surface.

[0040] (5) After assembly, dimension E is formed, namely surface ef, which is used to detect the position of the hammer striking surface.

[0041] (6) After assembly, dimension G, i.e., surface hi, is formed, which is used to detect the position of the hammer and the surface of the out-of-position safety hook.

[0042] (7) After assembly, dimension H, i.e., surface gh, is formed, which is used to detect the position of the hammer and the starting point of the in-place safety hook.

[0043] A method for using a gauge for detecting the external dimensions of a rotary hammer is as follows: insert the positioning pin 3 into the hammer to be measured, rotate the hammer clockwise to complete the positioning, and use it in conjunction with a step ruler to complete the hammer detection. Figure 5 ), ab(size D, Figure 6 ), ef(size E, Figure 7 ),hi(size G, Figure 8 ),gh(Size H, Fig. 9 ) are all the minimum values ​​of the corresponding hammer position dimensions. Matching ladder ruler steps ( Figure 2 ) Dimension I is the width of the tolerance band of the corresponding position size of the hammer. When in use, the measured point (plane) of the hammer should be higher than the corresponding detection surface of the gauge. The matching ladder ruler spans the gauge and the hammer. The measuring protrusion (teeth) of the ruler does not contact the hammer, which is manifested as a bright light visible between the measuring protrusion (teeth) and the measured surface of the hammer. At this time, it indicates that the position size of the measured surface of the hammer does not exceed the required tolerance band width, and the part is qualified. When the hammer is not higher than the detection surface of the gauge, it indicates that the position size of the measured surface of the hammer is too small. When there is no visible light between the shoulder of the ruler and the measured surface of the hammer, it indicates that the position size of the measured surface of the hammer is too large.

[0044] That is, the measuring block 7 is simulated by a specially designed shape, and the part of the rotary hammer whose positional relationship needs to be ensured is put on the rotary hammer. If it is completely qualified, theoretically, the distance (height difference) between the part to be measured of the rotary hammer (the part whose positional relationship needs to be ensured) and the corresponding specially designed shape on the measuring block 7 meets the tolerance band requirement, and the height difference between the two can be measured by a step-structured gauge. If the height difference meets the requirement, the rotary hammer is qualified.

[0045] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A gauge for detecting the external dimensions of a rotary hammer, characterized in that: It comprises a measuring seat, a positioning block and a positioning pin are arranged on the measuring seat, a pad is arranged between the measuring seat and the positioning block, a measuring block is arranged at the end of the positioning block adjacent to the positioning pin, the lower surface of the measuring block is flush with the lower surface of the positioning block, a limiting boss is arranged at the lower end of the measuring block, and the limiting boss protrudes downward from the lower surfaces of the measuring block and the positioning block; The positioning pin is used to insert into the main reference hole of the hammer for positioning; the inner side elevation of the limiting boss is used to position the hammer circumferentially; the lower surface of the positioning block is used to limit the hammer vertically; The right end face of the measuring block is face bc, and the distance from the axis of the positioning pin to face bc is dimension C. Dimension C corresponds to the distance between the main reference hole of the hammer and the starting point of the sear. The front end face of the measuring block is face ab, and the distance from the axis of the positioning pin to face ab is dimension D, which corresponds to the distance between the main reference hole of the hammer and the sear hanging surface; The right end face of the measuring seat is face ef, and the distance from the axis of the positioning pin to face ef is dimension E. Dimension E corresponds to the distance between the main reference hole of the hammer and the striking surface of the hammer. The lower right end of the measuring seat is provided with inclined planes hi and gh, which form a step surface. The distance from the axis of the positioning pin to the surface hi is dimension G, which corresponds to the distance between the main reference hole of the hammer and the surface of the in-place safety hook. The distance from the axis of the positioning pin to the surface gh is dimension H, which corresponds to the distance between the main reference hole of the hammer and the starting point of the in-place safety hook. After the hammer is positioned on the measuring seat, the height difference between each surface of the measuring seat and the corresponding measuring surface of the hammer is measured by a measuring device. If the height difference meets the tolerance requirement, the appearance of the hammer is qualified.

2. A gauge for detecting the external dimensions of a rotary hammer according to claim 1, characterized in that: The measuring seat and the positioning block are positioned by connecting pins and fastened by screws. The positioning pins and the measuring seat are fastened by metal glue.

3. A gauge for detecting the external dimensions of a rotary hammer according to claim 1, characterized in that: The inner side vertical surface of the limiting boss is an inclined surface, and the inclined surface is used to fit and position the hammer.

4. A gauge for detecting the external dimensions of a rotary hammer according to claim 1, characterized in that: The measuring device adopts a stepped straightedge, which has a measuring edge. A measuring protrusion is provided at one end of the measuring edge, and a step is formed between the measuring protrusion and the end face of the measuring edge of the stepped straightedge. A measuring tooth is provided at the other end of the measuring edge, and a step is formed between the measuring tooth and the end face of the measuring edge of the stepped straightedge. The heights of the two steps are both I, and I is the width of the tolerance zone of each size of the hammer shape. The measuring protrusion and the measuring teeth are used respectively according to the shapes of each measuring surface of the hammer.

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