A spindle ball socket position measuring tool and its use method

Abstract

The present invention discloses a spindle ball socket position accuracy measuring tool and a method for using the same. The spindle ball socket position accuracy measuring tool comprises a measuring tool and a counter-measurement component. The measuring tool comprises a lower base body, a first through hole provided on the lower base body, a positioning ball rod provided in the first through hole, a first ball head provided at the lower end of the positioning ball rod, a through slot provided on the side surface of the lower base body, a ball head lever provided in the through slot, a second ball head provided at the lower end of the ball head lever, and a spring provided on one side of the ball head lever. An upper base body is provided on the top surface of the lower base body, a second through hole provided on the upper base body, a set screw extending through the second through hole provided on the upper base body, a dial indicator hole perpendicular to the second through hole provided on the upper base body, and a bolt extending through the dial indicator hole provided on the upper base body. The counter-measurement component comprises a base plate, a third through hole and a fourth through hole provided on the base plate, and a tapered surface provided on the top of each of the third through hole and the fourth through hole. The present invention has the advantages of low equipment cost and low use cost, and helps to improve the yield rate of the spindle.

Description

Technical Field

[0001] The invention belongs to the field of measuring tools for ball sockets of the main shaft of a bent axis hydraulic motor pump, and provides a position measuring tool for the ball sockets of the main shaft of a bent axis hydraulic motor pump and a use method thereof. Background Art

[0002] The end face of the main shaft of the bent axis hydraulic motor pump has a central ball socket and multiple side ball sockets surrounding the central ball socket. The central ball socket and the side ball socket have the same diameter. The position accuracy of the side ball socket relative to the central ball socket (referred to as the main shaft ball socket position accuracy) is very high and is directly related to the performance and life of the bent axis hydraulic motor pump. Therefore, it is necessary to measure the main shaft ball socket position accuracy to avoid using a main shaft with unqualified main shaft ball socket position accuracy to assemble the bent axis hydraulic motor pump.

[0003] Currently, three-coordinate measuring instruments are used for testing. The three-coordinate measuring instrument is used to measure the position of the side sockets relative to the center socket. However, as a precision measuring instrument, the three-coordinate measuring instrument has very high equipment costs. Secondly, it has very high requirements for the use environment, which are mainly reflected in the following three points: First, to ensure accurate measurement, a special measuring room is required, and the indoor temperature must be kept constant at 22℃±2℃; second, compressed air with stable air pressure is used during measurement, and the compressed air must be above 0.4MPa for measurement, and the compressed air must be filtered of water and oil; third, the measurement room must be noise-free and dust-free. This leads to a high cost for the use of three-coordinate measuring instruments.

[0004] Therefore, the existing three-coordinate system for measuring the spindle ball and socket position has the disadvantages of high equipment cost and high usage cost. Summary of the Invention

[0005] The object of the present invention is to provide a spindle ball socket position measuring tool. The present invention has the advantages of low equipment cost and low use cost, and is helpful to improve the spindle yield.

[0006] The technical solution of the present invention is: a spindle ball socket position measuring tool, comprising a measuring tool and a table piece;

[0007] The measuring tool includes a lower base body, a first through hole is provided on the lower base body, a positioning ball rod is provided in the first through hole, a first ball head is provided at the lower end of the positioning ball rod, a through slot is provided on the side surface of the lower base body, a ball head lever is provided in the through slot and is rotatably connected to the lower base body, a second ball head is provided at the same height as the first ball head at the lower end of the ball head lever, and a spring connected to the bottom surface of the through slot is provided on one side of the ball head lever; an upper base body is provided on the top surface of the lower base body, a second through hole is provided on the upper base body through which the ball head lever passes, a set screw is provided on the upper base body and extends through the second through hole, a dial indicator hole is provided on the upper base body and is perpendicular to the second through hole, and a bolt is provided on the upper base body and extends through the dial indicator hole;

[0008] The counter-watch component comprises a bottom plate, on which a third through hole and a fourth through hole are arranged, and the tops of the third through hole and the fourth through hole are both provided with cone surfaces.

[0009] In the aforementioned spindle ball and socket position measuring tool, a fifth through hole is provided in the middle of the ball head lever, a pin shaft is provided in the fifth through hole, and threaded tops are provided on both sides of the ball head lever. The tip of the threaded top abuts against the pin shaft, and the tail end of the threaded top passes through the upper base, and a nut is provided at the tail end of the threaded top.

[0010] In the aforementioned spindle ball and socket position measuring tool, a spring washer is provided between the nut and the upper base.

[0011] In the aforementioned spindle ball and socket position measuring tool, a blind hole for accommodating a spring is provided on the bottom surface of the through groove, and a cylindrical pin connected to the ball head lever is provided in the spring.

[0012] In the aforementioned spindle ball and socket position measuring tool, the middle part of the second ball head is provided with four planes distributed around the ball head lever, and the planes are parallel to the axis of the ball head lever.

[0013] In the aforementioned spindle ball and socket position measuring tool, an elastic bushing is provided in the dial indicator hole.

[0014] In the aforementioned spindle ball and socket position measuring tool, the taper of the conical surface is 56°.

[0015] The method of using the spindle ball socket position measuring tool is as follows: a. Place the dial indicator into the elastic bushing and gently turn the bolt to initially fix the dial indicator.

[0016] b. Place the first ball head against the conical surface of the third through hole, place the second ball head against the conical surface of the third ball head, rotate the set screw, and the set screw pushes the ball head lever until the ball head lever contacts the probe of the dial indicator. Turn the set screw to make the dial pointer of the dial indicator point to zero, turn the bolt, and tighten the dial indicator.

[0017] c. Place the first ball head against the center socket of the spindle and the second ball head against the side socket. Read the value from the dial indicator and double it to get the position data of the side socket.

[0018] Compared with existing technologies, the present invention has a simple structure and reduces equipment costs. It also has very low environmental requirements, does not require a constant temperature measurement room, does not require compressed air, and does not require noise and dust-free operation, thus reducing operating costs. Due to its simple structure and low equipment costs, the present invention can be mass-produced, allowing production workers and inspection workers to be deployed simultaneously. This facilitates simultaneous measurement and comparison of the spindle by both production workers and inspection workers, reducing measurement errors, allowing problems to be discovered promptly during the production process and allowing for timely adjustment of spindle processing parameters, thereby improving the spindle yield.

[0019] Therefore, the present invention has the advantages of low equipment cost and low use cost, and is helpful to improve the yield rate of the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the front view of the measuring tool.

[0021] Figure 2 yes Figure 1 Sectional view at AA.

[0022] Figure 3 This is a top view of the measuring tool.

[0023] Figure 4 This is a front view of the watch.

[0024] Figure 5 This is a top view of the watch.

[0025] Figure 6 This is the front view of the spindle.

[0026] Figure 7 This is the right side view of the spindle.

[0027] The marks in the accompanying drawings are: 3-center ball socket, 4-side ball socket, 100-lower base, 101-first through hole, 102-positioning ball rod, 103-first ball head, 104-through groove, 105-ball head lever, 106-second ball head, 107-spring, 108-pin, 109-thread top, 110-upper base, 111-second through hole, 112-set screw, 113-dial indicator hole, 114-bolt, 115-nut, 116-spring washer, 117-blind hole, 118-cylindrical pin, 119-plane, 120-elastic bushing, 200-base plate, 201-third through hole, 202-fourth through hole, 203-conical surface. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and examples, but they are not intended to limit the present invention.

[0029] Embodiment. A spindle ball socket position measuring tool, such as Figures 1 to 3 As shown, it includes measuring tools and table components;

[0030] The measuring tool includes a lower base 100, a first through hole 101 is provided on the lower base 100, a positioning ball rod 102 is provided in the first through hole 101, a first ball head 103 is provided at the lower end of the positioning ball rod 102, a through groove 104 is provided on the side of the lower base 100, a ball head lever 105 rotatably connected to the lower base 100 is provided in the through groove 104, a second ball head 106 of the same height as the first ball head 103 is provided at the lower end of the ball head lever 105, and a spring 107 connected to the bottom surface of the through groove 104 is provided on one side of the ball head lever 105; 0 is provided on the top surface of the base 110, a positioning pin is provided between the lower base 100 and the upper base 110 and they are connected by a slotted screw, a second through hole 111 is provided on the upper base 110 through which the ball head lever 105 passes, the diameter of the second through hole 111 is larger than the diameter of the ball head lever 105, a set screw 112 is provided on the upper base 110 and passes through the second through hole 111, a dial indicator hole 113 perpendicular to the second through hole 111 is provided on the upper base 110, and a bolt 114 is provided on the upper base 110 and passes through the dial indicator hole 113.

[0031] A fifth through hole is defined in the middle of the ball lever 105, within which a pin 108 is disposed. Threaded tips 109 are provided on both sides of the ball lever 105. The tips of the threaded tips 109 abut against the pin 108, and the ends of the pin 108 are provided with recessed holes that mate with the tips of the threaded tips 109. The tail end of the threaded tips 109 passes through the upper base 110, and a nut 115 is provided at the tail end of the threaded tips 109. The threaded tips 109 are made of HB1999-89 M6X30 (material T8A HRC58-62) for long service life and wear resistance.

[0032] The axial distance between the pin shaft 108 and the second ball head 106 is equal to the axial distance between the pin shaft 108 and the dial indicator hole 113 .

[0033] A spring washer 116 is provided between the nut 115 and the upper base 110 .

[0034] A blind hole 117 for accommodating a spring 107 is provided on the bottom surface of the through slot 104 . A cylindrical pin 118 connected to the ball lever 105 is provided in the spring 107 .

[0035] The middle portion of the second ball head 106 is provided with four flat surfaces 119 distributed around the ball head lever 105, and the flat surfaces 119 are parallel to the axis of the ball head lever 105. The flat surfaces 119 are used to reduce the contact area between the second ball head 106 and the side ball socket, thereby improving measurement accuracy.

[0036] An elastic bushing 120 is provided in the dial indicator hole 113 , and the elastic bushing 120 is made of a soft material such as silicone.

[0037] The positioning ball rod 102 and ball lever 105 are both made of T10A, with a hardness of HRC 58-65, to extend their service life. The pin 108 is made of HB2009-89 6X12 (material T8A, HRC 58-62), which is long-lasting and wear-resistant. The upper base 110 and lower base 100 are both made of 45 steel, with a hardness of HRC 35-40.

[0038] like Figure 4 and Figure 5 As shown, the counter-watch component includes a base plate 200, which is provided with a third through-hole 201 and a fourth through-hole 202. The distance between the third through-hole 201 and the fourth through-hole 202 is the designed center-to-center distance between the center ball socket and the side ball socket. The tops of the third through-hole 201 and the fourth through-hole 202 are each provided with a tapered surface 203. The taper of the tapered surface 203 is 56°. The counter-watch component is made of CrMn with a hardness of HRC 58-65, and is required to be durable and low in deformation.

[0039] Two spheres with the same diameter are placed on the two conical surfaces 203 respectively. The spheres are in contact with the conical surfaces. The height error of the two spheres is required to be within 0.01mm. The diameter of the sphere is the same as the diameter of the center ball socket. The conical surface 203 is processed and polished by precision grinding, with a roughness of 0.1mm. The upper and lower surfaces of the watch are processed by precision grinding. For ease of processing, the top surface of the watch is 1.4mm lower than the center of the sphere, and the roughness of the upper and lower surfaces is guaranteed to be 0.2mm. The lower surface is the positioning reference for measurement and processing. During the manufacturing process, the upper and lower surfaces are each other's processing references. The center distance between the two conical surfaces is the center distance between the side ball socket and the center ball socket. The center distance tolerance of the two conical surfaces is 1 / 10 of the spindle ball socket position requirement.

[0040] The method of using the spindle ball and socket position measuring tool includes the following steps:

[0041] a. Place the dial indicator into the elastic bushing 120, insert the dial indicator probe into the second through hole 111, and turn the bolt 114. The bolt 114 compresses the elastic bushing 120 to initially fix the dial indicator.

[0042] b. Place the first ball head 103 against the tapered surface 203 of the third through hole 201, and place the second ball head 106 against the tapered surface 203 of the third ball head. Rotate the set screw 112, which pushes the ball head lever 105 to rotate around the threaded top 109 until the ball head lever 105 contacts the probe of the dial indicator. Rotate the set screw 112 to make the dial pointer of the dial indicator point to zero. Rotate the bolt 114 to secure the dial indicator.

[0043] c. Place the first ball head 103 against the central ball socket 3 of the main shaft, and place the second ball head 106 against one of the side ball sockets 4. Read the value from the dial indicator, double the value, and obtain the position data of the side ball socket 4.

[0044] The present invention has the advantages of low equipment cost and low use cost, and is helpful to improve the yield rate of the main shaft.

Claims

1. A spindle ball and socket position measuring tool, characterized by: Including measuring tools and table parts; The measuring tool comprises a lower base (100), a first through hole (101) is provided on the lower base (100), a positioning ball rod (102) is provided in the first through hole (101), a first ball head (103) is provided at the lower end of the positioning ball rod (102), a through groove (104) is provided on the side surface of the lower base (100), a ball head lever (105) rotatably connected to the lower base (100) is provided in the through groove (104), a second ball head (106) having the same height as the first ball head (103) is provided at the lower end of the ball head lever (105), and the ball head lever (105) is provided with a plurality of spherical heads (106) having the same height as the first ball head (103). A spring (107) connected to the bottom surface of the through groove (104) is provided on one side; an upper base (110) is provided on the top surface of the lower base (100); a second through hole (111) passed through by the ball head lever (105) is provided on the upper base (110); a set screw (112) passing through the second through hole (111) is provided on the upper base (110); a dial indicator hole (113) perpendicular to the second through hole (111) is provided on the upper base (110); and a bolt (114) passing through the dial indicator hole (113) is provided on the upper base (110); The watch element comprises a bottom plate (200), the bottom plate (200) is provided with a third through hole (201) and a fourth through hole (202), and the tops of the third through hole (201) and the fourth through hole (202) are both provided with a conical surface (203); A fifth through hole is provided in the middle of the ball head lever (105), a pin shaft (108) is provided in the fifth through hole, and threaded tips (109) are provided on both sides of the ball head lever (105), the tip of the threaded tips (109) abuts against the pin shaft (108), the tail end of the threaded tips (109) passes through the upper base (110), and a nut (115) is provided at the tail end of the threaded tips (109); An elastic bushing (120) is provided in the dial indicator hole (113).

2. The spindle ball and socket position measuring tool according to claim 1, characterized in that: A spring washer (116) is provided between the nut (115) and the upper base (110).

3. The spindle ball and socket position measuring tool according to claim 1, characterized in that: A blind hole (117) for accommodating a spring (107) is provided on the bottom surface of the through groove (104), and a cylindrical pin (118) connected to the ball lever (105) is provided in the spring (107).

4. The spindle ball and socket position measuring tool according to claim 1, characterized in that: The middle portion of the second ball head (106) is provided with four planes (119) distributed around the ball head lever (105), and the planes (119) are parallel to the axis of the ball head lever (105).

5. The spindle ball and socket position measuring tool according to claim 1, characterized in that: The taper of the conical surface (203) is 56°.

6. The method for using the spindle ball and socket position measuring tool according to any one of claims 1 to 5, characterized in that: The following steps are involved: a. Place the dial indicator into the elastic bushing (120) and turn the bolt (114) to initially fix the dial indicator. b. Place the first ball head (103) against the conical surface (203) on the third through hole (201), place the second ball head (106) against the conical surface (203) of the third ball head, rotate the set screw (112), and the set screw (112) pushes the ball head lever (105) to rotate until the ball head lever (105) contacts the probe of the dial indicator, rotate the set screw (112) so that the dial pointer of the dial indicator points to zero, and rotate the bolt (114) to fix the dial indicator. c. Place the first ball head (103) against the center ball socket of the main shaft, place the second ball head (106) against the side ball socket, read the value from the dial indicator, double the value, and obtain the position data of the side ball socket.

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