A hollow bolt spherical surface run-out measuring jig
Patent Information
- Application Number
- CN202522374172.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-11-10
AI Technical Summary
[0002]一种空心螺栓其结构如图1和图2所示，其包括螺母61，并在螺母61的一侧固定有螺栓柱6，螺栓柱6的内部开设有压腔62和通槽63，压腔62的直径尺寸大于通槽63的直径尺寸，压腔62和通槽63相连通，其连接的位置设置有斜面，压腔62设置在靠近螺母61的位置，同时在生产的过程中，会在压腔62的内部放置一个钢球，钢球的尺寸大于通槽63的直径、小于压腔62的直径，并在钢球放入后使用冲压头对钢球进行冲压，使钢球在斜面上冲压出球面64，在斜面上冲压出的球面64需要确保其旋转中心和通槽63以及压腔62的轴线共线，以此来确保本产品的正常使用，但钢球在冲压后，需要对冲压出的球面64进行检测，以确保压覆出来的球面64符合后续的使用要求，但因为球面64位于螺栓柱6的位置，其内部空间狭小，用来测量的结构无法伸入到螺栓柱6的内部，这就导致导致无法检测球面64被冲压的是否合规，进而无法做到对本产品的品控
该空心螺栓球面跳动测量治具中，通过设置的放置槽和压板对转杆的位置进行定位，使转杆可以在放置槽中进行稳定的转动，同时使抵柱挤压压杆，将接触球的侧壁和球面的侧壁接触，并使检测杆的一端从通槽中伸出，然后千分表的检测端和检测杆伸出的侧壁接触，通过旋转治具架，使千分表检测检测杆的同心度，以此来确定球面被冲压的情况，通过此种方式做到对球面的检测，以此来做到对本产品的品控，确保本产品后续的正常使用。
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Figure CN224872994U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hollow bolt spherical detection technology, specifically, to a hollow bolt spherical runout measuring fixture. Background Technology
[0002] A type of hollow bolt with the following structure Figure 1 and Figure 2 As shown, it includes a nut 61, and a bolt post 6 is fixed to one side of the nut 61. The bolt post 6 has a pressure cavity 62 and a through groove 63 inside. The diameter of the pressure cavity 62 is larger than the diameter of the through groove 63. The pressure cavity 62 and the through groove 63 are connected, and an inclined surface is provided at the connection point. The pressure cavity 62 is located near the nut 61. During production, a steel ball is placed inside the pressure cavity 62. The size of the steel ball is larger than the diameter of the through groove 63 but smaller than the diameter of the pressure cavity 62. After the steel ball is placed, a punch head is used to press the steel ball, causing it to be pressed against the inclined surface. The spherical surface 64 is stamped out on the inclined surface. It is necessary to ensure that the rotation center of the spherical surface 64 is collinear with the axis of the through groove 63 and the pressure cavity 62 to ensure the normal use of this product. However, after the steel ball is stamped, the stamped spherical surface 64 needs to be inspected to ensure that the stamped spherical surface 64 meets the subsequent use requirements. However, because the spherical surface 64 is located at the position of the bolt post 6, its internal space is narrow. The measuring structure cannot be inserted into the interior of the bolt post 6. This makes it impossible to detect whether the stamping of the spherical surface 64 is compliant, and thus it is impossible to achieve quality control of this product. Summary of the Invention
[0003] The purpose of this invention is to provide a hollow bolt spherical runout measuring fixture to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides a hollow bolt spherical runout measuring fixture, including a worktable, a fixture base on the upper side of the worktable, a fixture frame on the fixture base, and the fixture frame rotatably mounted on the fixture base. The fixture frame includes a reference component and a testing component. The testing component is placed inside the bolt post, with one end extending out of the bolt post through a through groove, and the other end of the testing component is located in a pressure cavity. A nut is fixed to one end of the reference component. At this time, the reference component pushes the testing component, causing the side wall of the testing component to contact the side wall of the spherical surface. A fixed bracket is fixedly installed on the upper side of the worktable, and a dial indicator is fixed to one end of the fixed bracket. The testing end of the dial indicator contacts the side wall of the end of the testing component extending out of the bolt post. When the fixture frame rotates, the testing end of the dial indicator performs arc surface detection on the side wall of the protruding part of the testing component.
[0005] As a further improvement to this technical solution, the fixture base includes a tail block, a placement block is fixed to one side of the tail block, the placement block is fixed to the workbench by screws, and a pressure plate is provided at the upper end of the placement block away from the tail block. The two ends of the pressure plate are fixed to the upper side of the placement block by fixing screws.
[0006] As a further improvement to this technical solution, the reference component includes a rotating rod, one end of which is fixed with a regular hexagonal prism, one end of which is fixed with a threaded post, and the end of the threaded post away from the regular hexagonal prism is fixed with a stop post.
[0007] As a further improvement to this technical solution, the upper sidewall of the placement block is provided with a V-shaped placement groove. The placement groove and the lower side of the pressure plate are combined to form a space for installing a rotating rod. One end of the rotating rod is rotatably inserted into this space, and the sidewall of the rotating rod slides in contact with the two sidewalls of the placement groove and the bottom sidewall of the pressure plate, respectively.
[0008] As a further improvement to this technical solution, the detection element includes a contact ball of the same size as the steel ball, and a detection rod and a pressure rod are fixed on the contact ball. The detection rod and the pressure rod are coaxially arranged, the diameter of the detection rod is smaller than the diameter of the through groove, and the diameter of the pressure rod is smaller than the diameter of the pressure cavity.
[0009] As a further improvement to this technical solution, the contact ball is in contact with the spherical surface, one end of the detection rod extends out of the through groove, and the pressure rod is in the pressure cavity.
[0010] As a further improvement to this technical solution, one end of the threaded column is connected to the internal thread of the nut, the abutment enters the pressure cavity and abuts against one end of the pressure rod, and the detection end of the dial indicator contacts the position where the detection rod extends out of the through groove.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: In this hollow bolt spherical runout measuring fixture, the position of the rotating rod is positioned by a placement groove and a pressure plate, allowing the rotating rod to rotate stably in the placement groove. At the same time, the abutment column presses against the pressure rod, bringing the side wall of the contact ball into contact with the side wall of the spherical surface. One end of the detection rod extends out of the through groove, and then the testing end of the dial indicator contacts the side wall of the extended detection rod. By rotating the fixture frame, the dial indicator detects the concentricity of the detection rod, thereby determining the stamping condition of the spherical surface. This method is used to inspect the spherical surface, thereby achieving quality control of the product and ensuring its normal use in the future. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the hollow bolt structure of this utility model; Figure 2This is a schematic diagram of the structure of a hollow bolt used to stamp a spherical surface in a utility model. Figure 3 This is a schematic diagram of the structure of the device during testing. Figure 4 A schematic diagram of the structure of the fixture base and fixture frame of the utility model when fixing hollow bolts; Figure 5 This is a schematic diagram of the fixture base structure of the utility model; Figure 6 A schematic diagram of the structure for fixing hollow bolts to the jig frame of the utility model; Figure 7 This is a schematic diagram of the exploded structure of the fixture frame and hollow bolts of the utility model. Figure 8 This is a cross-sectional structural diagram of the fixture frame for fixing hollow bolts, which is a utility model.
[0013] The meanings of the labels in the diagram are as follows: 1. Workbench; 2. Fixture base; 21. Tail block; 22. Placement block; 23. Placement slot; 24. Pressure plate; 25. Fixing screw; 3. Fixture frame; 31. Rotating rod; 32. Regular hexagonal prism; 33. Threaded post; 34. Abutment post; 35. Contact ball; 36. Pressure rod; 37. Detection rod; 4. Fixed bracket; 5. Dial indicator; 6. Bolt post; 61. Nut; 62. Pressure cavity; 63. Through groove; 64. Spherical surface. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Example
[0016] Please see Figures 3-8As shown, this embodiment provides a hollow bolt spherical runout measuring fixture, including a worktable 1, a fixture seat 2 on the upper side of the worktable 1, a tail block 21, a placement block 22 fixed on one side of the tail block 21, the placement block 22 being fixed to the worktable 1 by screws, a pressure plate 24 being provided at the upper end of the placement block 22 away from the tail block 21, the two ends of the pressure plate 24 being fixed to the upper side of the placement block 22 by fixing screws 25, a fixture frame 3 being provided on the fixture seat 2, the fixture frame 3 being rotatably mounted on the fixture seat 2, the hollow bolt being fixed on the fixture frame 3, and the fixture frame 3 being manually driven to rotate on the fixture seat 2.
[0017] The fixture frame 3 includes a reference component and a testing component. The testing component is placed inside the bolt post 6, with one end extending out of the bolt post 6 through a through slot 63. The other end of the testing component is located in the pressure cavity 62. A nut 61 is fixed to one end of the reference component. At this time, the reference component pushes the testing component, causing the side wall of the testing component to contact the side wall of the spherical surface 64. Meanwhile, a fixed bracket 4 is fixedly installed on the upper side of the worktable 1. The fixed bracket 4 is a structure formed by multiple hinge rods hinged together, and bolts are provided at each hinge position. By tightening the bolts, the position of the hinge rods can be fixed. The fixed bracket 4 can also combine the hinge rods with a tightenable universal joint, allowing the hinge rods to... Multi-angle adjustments are made. A dial indicator 5 is fixed at one end of the fixed bracket 4. The detection end of the dial indicator 5 contacts the side wall of the end of the bolt column 6 that is being tested. When the fixture frame 3 rotates, the detection end of the dial indicator 5 performs arc surface testing on the side wall of the bolt column. If the center of the spherical surface (64) is not coaxial with the axis of the bolt column (6), the detection rod (37) will be forced to wobble, and its protruding end will generate radial runout. This runout is displayed by the dial indicator (5). By analyzing this runout, the stamping position accuracy of the spherical surface (64) can be determined. In this way, the stamping condition of the spherical surface 64 can be obtained, thereby determining whether the hollow bolt production is qualified.
[0018] The reference component includes a rotating rod 31, with a regular hexagonal prism 32 fixed to one end of the rotating rod 31, a threaded post 33 fixed to one end of the regular hexagonal prism 32, and a stop post 34 fixed to the end of the threaded post 33 away from the regular hexagonal prism 32. A V-shaped placement groove 23 is provided on the upper side wall of the placement block 22. The placement groove 23 and the lower side of the pressure plate 24 combine to form a space for installing the rotating rod 31. One end of the rotating rod 31 is rotatably inserted into this space, and the side walls of the rotating rod 31 are slidably connected to the two side walls of the placement groove 23 and the bottom side wall of the pressure plate 24, respectively. The bottom of the pressure plate 24 is provided with an arc-shaped groove that matches the arc surface of the rotating rod 31. When the rotating rod 31 is clamped between the placement groove 23 and the pressure plate 24, the side wall of the rotating rod 31 slides into contact with the arc-shaped groove. At this time, the pressure plate 24 does not press the rotating rod 31, but only restricts the position of the rotating rod 31, so that the rotating rod 31 can rotate or move horizontally along its own axis in the placement groove 23 without tilting. At the same time, the rotating rod 31 is used as the reference surface for detection, and the axis of the rotating rod 31 is used as the reference axis for detection.
[0019] The testing component includes a contact ball 35 of the same size as the steel ball. A testing rod 37 and a pressure rod 36 are fixed on the contact ball 35. The testing rod 37 and the pressure rod 36 are coaxially arranged. The diameter of the testing rod 37 is smaller than the diameter of the through groove 63, and the diameter of the pressure rod 36 is smaller than the diameter of the pressure cavity 62.
[0020] When testing hollow bolts, the user first places the testing piece inside the bolt post 6 from one end of the pressure chamber 62. One end of the testing rod 37 extends from the through groove 63, and the contact ball 35 contacts the spherical surface 64. The pressure rod 36 is in the pressure chamber 62. Then, the user picks up the rotating rod 31 and inserts one end of the abutment 34 into the nut 61. Then, one end of the threaded post 33 is connected to the internal thread of the nut 61. As the threaded post 33 rotates, one end of the abutment 34 gradually approaches the pressure rod 36. During this process, the abutment 34 enters the pressure chamber 62 and abuts against one end of the pressure rod 36. One end of the abutment 34 is set to be arc-shaped, and one end of the pressure rod 36 is set with a cavity. When the pressure rod 36 and the abutment 34 abut against each other, the arc-shaped part of the abutment 34 is inserted into the cavity. The arc surface of the abutment 34 and the pressure rod 36 abut against each other... When rod 36 contacts, it does not restrict the position of pressure rod 36. When spherical surface 64 is skewed, the abutment 34 will not restrict the position of pressure rod 36, ensuring the detection effect of the test piece on spherical surface 64. When the abutment 34 abuts against pressure rod 36, the side wall of contact ball 35 contacts the side wall of spherical surface 64. When the rotating rod 31 abuts against contact ball 35, the rotating rod 31 can no longer rotate. Then, one end of the rotating rod 31 is inserted between placement groove 23 and pressure plate 24, so that the side wall of placement groove 23 and the side wall of pressure plate 24 restrict the position of rotating rod 31, so that rotating rod 31 can rotate stably along the axis. Then, the user adjusts the position of fixed bracket 4 so that the detection end of dial indicator 5 contacts the position where detection rod 37 extends out of through groove 63. At this time, the position of dial indicator 5 is controlled so that the data displayed on dial indicator 5 is zeroed.
[0021] The user rotates the regular hexagonal prism 32, and then the bolt post 6 and the detection rod 37 rotate together. At this time, the following situations may occur: The spherical 64 is stamped in the correct position. At this time, the contact ball 35 and the spherical 64 are in the correct contact position. The push of the pressure rod 36 by the abutment 34 makes the axis of the pressure rod 36, the detection rod 37 and the axis of the through groove 63 collinear. The value detected on the dial indicator 5 fluctuates within the specified value. At this time, the production of the hollow bolt is qualified. When the spherical surface 64 is pressed at an angle, the pressure rod 36 is pushed by the abutment 34 when the contact ball 35 and the spherical surface 64 come into contact. At this time, there is an angle between the axis of the pressure rod 36 and the axis of the detection rod 37 and the axis of the through groove 63. At this time, one side of the detection rod 37 is tilted in the through groove 63. During the rotation of the fixture frame 3, the data displayed on the dial indicator 5 will exceed the specified value, which indicates that the hollow bolt is not produced in good condition.
[0022] The rotating rod 31 is positioned by the placement groove 23 and the pressure plate 24, allowing it to rotate stably within the placement groove 23. Simultaneously, the abutment 34 presses against the pressure rod 36, bringing the sidewall of the contact ball 35 into contact with the sidewall of the spherical surface 64. One end of the detection rod 37 extends from the through groove 63, and the detection end of the dial indicator 5 contacts the protruding sidewall of the detection rod 37. By rotating the fixture frame 3, the dial indicator 5 detects the concentricity of the detection rod 37, thus determining the stamping condition of the spherical surface 64. This method of detecting the spherical surface 64 ensures quality control of the product and guarantees its subsequent normal use.
[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A hollow bolt spherical runout measuring fixture, comprising a worktable (1), characterized in that: A fixture seat (2) is provided on the upper side of the workbench (1), and a fixture frame (3) is provided on the fixture seat (2). The fixture frame (3) is rotatably set on the fixture seat (2). The fixture frame (3) includes a reference piece and a test piece. The test piece is placed inside the bolt post (6), and one end of it extends out of the bolt post (6) through the through groove (63). The other end of the test piece is set in the pressure cavity (62). The nut (61) is fixed to one end of the reference piece. At this time, the reference piece pushes the test piece so that the side wall of the test piece contacts the side wall of the spherical surface (64). A fixed bracket (4) is fixedly installed on the upper side of the workbench (1). A dial indicator (5) is fixed at one end of the fixed bracket (4). The testing end of the dial indicator (5) contacts the side wall of the end of the test piece that extends out of the bolt post (6). When the fixture frame (3) rotates, the testing end of the dial indicator (5) performs arc surface testing on the side wall of the test piece.
2. The hollow bolt spherical runout measuring fixture according to claim 1, characterized in that: The fixture base (2) includes a tail block (21), and a placement block (22) is fixed on one side of the tail block (21). The placement block (22) is fixed on the workbench (1) by screws. A pressure plate (24) is provided on the upper side of the placement block (22) away from the tail block (21). Both ends of the pressure plate (24) are fixed on the upper side of the placement block (22) by fixing screws (25).
3. The hollow bolt spherical runout measuring fixture according to claim 2, characterized in that: The reference component includes a rotating rod (31), one end of which is fixed with a regular hexagonal prism (32), one end of which is fixed with a threaded post (33), and the end of the threaded post (33) away from the regular hexagonal prism (32) is fixed with a stop post (34).
4. The hollow bolt spherical runout measuring fixture according to claim 3, characterized in that: The upper side wall of the placement block (22) is provided with a V-shaped placement groove (23). The placement groove (23) and the lower side of the pressure plate (24) are combined to form a space for installing the rotating rod (31). One end of the rotating rod (31) is rotatably inserted into the space, and the side wall of the rotating rod (31) slides in contact with the two side walls of the placement groove (23) and the bottom side wall of the pressure plate (24).
5. The hollow bolt spherical runout measuring fixture according to claim 3, characterized in that: The detection component includes a contact ball (35) of the same size as the steel ball. A detection rod (37) and a pressure rod (36) are fixed on the contact ball (35). The detection rod (37) and the pressure rod (36) are coaxially arranged. The diameter of the detection rod (37) is smaller than the diameter of the through groove (63), and the diameter of the pressure rod (36) is smaller than the diameter of the pressure cavity (62).
6. The hollow bolt spherical runout measuring fixture according to claim 5, characterized in that: The contact ball (35) is in contact with the spherical surface (64), one end of the detection rod (37) extends out from the through groove (63), and the pressure rod (36) is in the pressure cavity (62).
7. The hollow bolt spherical runout measuring fixture according to claim 6, characterized in that: One end of the threaded column (33) is connected to the internal thread of the nut (61), the abutment (34) enters the pressure chamber (62) and abuts against one end of the pressure rod (36), and the detection end of the dial indicator (5) and the detection rod (37) are in contact with the position where they extend out of the through groove (63).