Device for measuring tooth profile and tooth direction of outer rotor of cycloid rotor pump

Abstract

The utility model relates to a device for measuring tooth profile and tooth direction of an outer rotor of a cycloid rotor pump, and solves the technical problems that the detection efficiency is low, the operation is relatively complicated, the consumed time is long, and the accuracy of a measurement result cannot be completely ensured in the prior art. The horizontal ruler comprises a base, a wheel disc, a tooth-shaped module, a horizontal ruler rod, a vertical rod, a fastening screw and a deep groove ball bearing. An inner ring of the deep groove ball bearing is fixedly connected with the base, and a wheel disc is arranged on an outer ring of the deep groove ball bearing; different tooth-shaped modules are arranged on the wheel disc; the tooth-shaped module comprises a standard module manufactured according to the standard tooth shape of the outer rotor and a non-standard module which is the same as the standard module in shape and is enlarged or reduced in size, and the tooth-shaped module is used for measuring the tooth shape and the tooth direction of the outer rotor; a vertical rod is arranged on the base, a horizontal ruler rod is arranged on the vertical rod in a sleeving mode, and the horizontal ruler rod can move to any position in the circumferential direction or the axial direction of the vertical rod and then is fixed. Height scales are marked on the vertical rod corresponding to the horizontal ruler rod.

Description

Technical Field

[0001] The utility model relates to a measuring device for a cycloid rotor pump, in particular to a measuring device for the tooth shape and tooth direction of an outer rotor of a cycloid rotor pump. Background Art

[0002] The cycloid rotor pump is an internal gear pump with a specific tooth shape. Its core components are the inner rotor and the outer rotor. The tooth curve of the outer rotor is composed of multiple arc segments. In the actual production process, the outer rotor is usually formed by powder metallurgy die casting using a mold, so the quality control of its tooth shape and tooth direction mainly depends on post-production inspection.

[0003] For the tooth profile measurement of the outer rotor of the cycloid rotor pump, the commonly used method is to use a three-coordinate measuring machine. The measurement method is: the test probe is moved around the tooth profile of the outer rotor for one circle, a certain number of measurement points are selected, and a tooth profile curve is fitted. The fitted tooth profile curve is compared with the theoretical curve based on the theoretical arc parameters to evaluate the tooth profile quality of the outer rotor.

[0004] Similarly, the tooth direction detection of the outer rotor is currently also commonly measured using a three-coordinate measuring machine. The measurement method is: place the outer rotor horizontally, scan the test probe along the vertical direction of the tooth direction of the outer rotor, select a certain number of measurement points, and calculate and analyze the distribution of the measurement points to evaluate the tooth direction quality of the outer rotor.

[0005] However, this method of measuring using a three-coordinate measuring machine requires selecting measurement points first and then performing theoretical calculations for comparison and evaluation. Not only is the detection efficiency low, the operation is also relatively complicated and time-consuming, and the accuracy of the measurement results cannot be fully guaranteed.

[0006] Chinese patent CN204313734U discloses a cycloidal conjugation measuring device, including: a mandrel and a measuring shaft; the mandrel is used to sleeve and position the inner and outer rotors; a double probe lever and a dial indicator are provided on the measuring shaft, the double probe lever is slidably connected to the measuring shaft and positioned on the measuring shaft through a locking member; the double probe lever includes two levers; the middle hinge of the two levers, the tail end is a fixed part, and the front end is a lever probe; the dial indicator is fixed on the tail end of any one of the levers, and the probe of the dial indicator touches the tail end of the other lever; the two lever probes touch the measured surfaces of the inner and outer rotors to be measured respectively. This patent can replace the cumbersome and complex methods such as traditional sample measurement, projector measurement, and three-coordinate measurement, and realize fast and accurate measurement, but the measuring device is mainly designed for the conjugation measurement of the inner rotor and the outer rotor, and needs to measure both at the same time and the degree of mutual coordination.

[0007] Chinese patent CN220583293U discloses a device for measuring the tooth shape and tooth direction of the inner rotor of a cycloidal rotor pump, including a measuring platform, a positioning core rod is fixedly connected to the top of the measuring platform; the diameter of the positioning core rod is the same as the inner diameter of the inner rotor, and the inner rotor can be mounted on the positioning core rod; one side of the measuring platform is fixedly connected to the side wall plate; the side wall plate is also connected to a number of measuring plate racks perpendicular to it; a number of measuring plates of different sizes that match the structure of the inner rotor are placed on the measuring plate rack. This patent can quickly determine the tooth shape error between the inner rotor to be measured and the standard inner rotor by fixing the inner rotor on the positioning core rod and sleeved the measuring plates of different sizes on the inner rotor; the operation is simple and convenient, and the inner rotor can be measured quickly and accurately, which greatly improves the detection efficiency of the inner rotor; but this patent is mainly designed for the tooth shape and tooth direction measurement of the inner rotor. Utility Model Content

[0008] The purpose of the utility model is to solve the technical problems in the prior art that the detection efficiency is low, the operation is relatively complicated, the operation is time-consuming, and the accuracy of the measurement results cannot be fully guaranteed, and to provide a device for measuring the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump.

[0009] In order to achieve the above purpose, the technical solutions provided by the utility model are as follows:

[0010] A device for measuring the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump, which is special in that:

[0011] Including base;

[0012] A deep groove ball bearing is arranged on the base, the inner ring of the deep groove ball bearing is fixedly connected to the base, and the outer ring is fixedly connected to the wheel disc;

[0013] The wheel disc is provided with at least three tooth modules of different sizes;

[0014] The at least three tooth profile modules include a standard module prepared according to the standard tooth profile of the outer rotor to be tested, at least one non-standard module with the same shape and proportionally enlarged size as the standard module, and at least one non-standard module with the same shape and proportionally reduced size as the standard module, which are used to measure the tooth profile and tooth direction of the outer rotor to be tested;

[0015] A vertical rod is arranged on the base at the center of the deep groove ball bearing, and a horizontal ruler is sleeved on the vertical rod. The horizontal ruler can move to any position along the circumference and axial direction of the vertical rod and be fixed;

[0016] The distance between the outer end of the horizontal ruler and the vertical pole is greater than the distance between the toothed module farthest from the vertical pole and the vertical pole;

[0017] There are height scales marked on the pole.

[0018] Furthermore, the central axes of at least three tooth-shaped modules are distributed on the circumference at the radial 1 / 2 of the wheel disc, and are arranged in sequence counterclockwise or clockwise from small to large according to size.

[0019] Furthermore, the horizontal ruler rod is fixed to the vertical pole by means of a fastening screw, and the relative position of the horizontal ruler rod on the vertical pole is adjusted by loosening the fastening screw.

[0020] Furthermore, the position of the tooth module on the wheel is marked with a gap value, which refers to the difference between the tooth module and the standard module. The gap value of the standard module is 0, the difference is greater than the gap value of the standard module is a positive value, and the difference is less than the gap value of the standard module is a negative value.

[0021] Furthermore, the horizontal ruler rod includes a rotating block sleeved on the vertical pole, and a rod body connected to the rotating block, and the fastening screw is used to fix the rotating block on the vertical pole.

[0022] Further, the base includes a support plate and a boss disposed on the support plate;

[0023] The top outer periphery of the boss is fixedly connected to the inner ring of the deep groove ball bearing;

[0024] The vertical rod is arranged at the top center position of the convex column.

[0025] Furthermore, mounting posts adapted to the inner holes of the toothed modules are provided on the circumference at the radial 1 / 2 of the wheel disc, the number of the mounting posts is consistent with the number of the toothed modules, and each toothed module is respectively mounted on a corresponding mounting post.

[0026] Furthermore, the at least three tooth profile modules are specifically seven, including a standard module prepared according to the standard tooth profile of the outer rotor to be tested, three non-standard modules with the same shape and proportionally enlarged size as the standard module, and three non-standard modules with the same shape and proportionally reduced size as the standard module.

[0027] Furthermore, the gap values ​​of the seven tooth modules are +0.03mm, +0.02mm, +0.01mm, 0, -0.01mm, -0.02mm, and -0.03mm respectively; depending on the workpiece error in actual production, the non-standard module can also be designed with other deviation values, generally taking an arithmetic progression as the value for easy measurement.

[0028] Furthermore, the height scale of the upright pole is 0 to 50 mm.

[0029] Compared with the prior art, the utility model has the following beneficial effects:

[0030] 1. The utility model discloses a device for measuring the tooth profile and tooth direction of the outer rotor of a cycloidal rotor pump. Outer rotor tooth profile measuring modules (tooth profile modules) of different sizes are made according to the size parameters of the outer rotor tooth profile. The modules are installed on a rotatable wheel disc. The error of the outer rotor tooth profile can be measured quickly and the measurement accuracy can be guaranteed. The operation is simple and the practicability is strong.

[0031] 2. The utility model provides a measuring device for the tooth shape and tooth direction of the outer rotor of a cycloidal rotor pump. Through the design of the tooth shape module and with the help of the scales of the horizontal ruler and the vertical rod, the draft angle or small protrusion of the tooth direction of the outer rotor can be quickly measured, and the measurement accuracy can be guaranteed. The operation is simple and the practicability is strong.

[0032] 3. The utility model is a device for measuring the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump. The device adopts a rotating wheel design, which can facilitate the selection of tooth shape modules and speed up the detection speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A three-dimensional structural schematic diagram of an embodiment of a device for measuring the tooth shape and tooth direction of an outer rotor of a cycloid rotor pump according to the utility model;

[0034] Figure 2 This is a reference schematic diagram of the measurement state of an embodiment of the utility model;

[0035] Figure 3 It is a scale-marked diagram of an embodiment of the utility model;

[0036] Figure 4 It is a gap marking diagram of an embodiment of the utility model;

[0037] Figure 5 It is a three-dimensional structural schematic diagram of the toothed module in the embodiment of the utility model;

[0038] Figure 6 This is a front view of the toothed module in the embodiment of the utility model;

[0039] Figure 7 It is a schematic diagram of the three-dimensional structure of the outer rotor in the embodiment of the utility model;

[0040] Figure 8 It is a front view of the outer rotor in the embodiment of the utility model.

[0041] The following are the descriptions of the figures:

[0042] 1-base, 2-wheel disc, 3-tooth module, 4-outer rotor, 5-horizontal ruler rod, 6-vertical rod, 7-fastening screw, 8-deep groove ball bearing. DETAILED DESCRIPTION

[0043] The specific technical solution of the utility model will be further described below in conjunction with the accompanying drawings.

[0044] The utility model provides a device for measuring the tooth profile and tooth direction of the outer rotor of a cycloid rotor pump. The device mainly manufactures a standard outer rotor tooth profile module according to the arc size parameters of the outer rotor tooth profile, and then takes the standard tooth profile module (with a zero clearance from the theoretical tooth profile) as the midpoint, arranges the values ​​on the positive and negative axes according to an arithmetic progression, designs a series of tooth profile modules with different clearances according to the axis values, and installs these tooth profile modules on a rotatable wheel. The outer rotor to be tested is then sequentially fitted with the tooth profile modules, and the difference between the actual tooth profile and the theoretical tooth profile can be accurately measured, and whether there is a draft angle or a small protrusion on the tooth direction can also be measured. The specific embodiments of the utility model are as follows:

[0045] refer to Figure 1 , Figure 3-Figure 6 , a measuring device for the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump, used to measure the structure of the outer rotor 4, the outer rotor 4 reference Figure 7-Figure 8 ;

[0046] It includes a base 1, a wheel disc 2, a toothed module 3, a horizontal ruler 5, a vertical rod 6, a fastening screw 7, and a deep groove ball bearing 8;

[0047] The base 1 includes a support plate and a convex column arranged on the support plate;

[0048] The deep groove ball bearing 8 is arranged at the center of the base 1, the inner ring is fixedly connected to the outer periphery of the top of the convex column of the base 1, and the outer ring is fixedly connected to the inner hole of the wheel disc 2;

[0049] There are seven tooth profile modules 3 of different sizes, including a standard module prepared according to the standard tooth profile of the outer rotor 4, three non-standard modules with the same shape and proportionally enlarged size as the standard module, and three non-standard modules with the same shape and proportionally reduced size as the standard module, so as to measure the tooth profile and tooth direction of the outer rotor 4 to be tested;

[0050] Seven mounting posts are arranged on the circumference of the wheel disc 2 at the radial 1 / 2 position, and the size of the mounting posts matches the inner hole of the corresponding toothed module 3, and the toothed module 3 is mounted on the corresponding mounting posts;

[0051] The gap value is marked on the wheel 2 at the position corresponding to the toothed module 3. The gap value of the standard module is 0, the gap value of the difference is greater than the gap value of the standard module is a positive value, and the gap value of the difference is less than the gap value of the standard module is a negative value. The gap values ​​of the seven toothed modules 3 are +0.03mm, +0.02mm, +0.01mm, 0, -0.01mm, -0.02mm, and -0.03mm, respectively, distributed from large to small, for easy measurement;

[0052] On the base 1, a vertical rod 6 is arranged at the center position of the top end of the convex column, and a horizontal ruler 5 is sleeved on the vertical rod 6. The horizontal ruler 5 can move circumferentially or axially along the vertical rod 6;

[0053] The horizontal ruler rod 5 includes a rotating block sleeved on the vertical rod 6, and a rod body connected to the rotating block, and the distance between the outer end of the rod body and the vertical rod 6 is greater than the distance between the toothed module 3 and the vertical rod 6; the rotating block is fixed to the vertical rod 6 by a fastening screw 7, and the relative position of the horizontal ruler rod 5 on the vertical rod 6 is adjusted by loosening the fastening screw 7;

[0054] The vertical rod 6 is marked with a height scale at a position corresponding to the horizontal ruler 5, ranging from 0 to 50 mm.

[0055] The assembly process of the embodiment of the utility model is: first, the deep groove ball bearing 8 is installed on the base 1, and then the wheel disc 2 is sleeved on the outer ring of the deep groove ball bearing 8, and then the tooth modules are installed on the wheel disc 2 one by one according to the gap value marked on the wheel disc 2. A vertical pole 6 is set at the center position of the wheel disc 2, and a height scale is provided on the vertical pole 6. The horizontal ruler 5 can be vertically moved up and down on the vertical pole 6, and can also rotate around the vertical pole 6. The fastening screw 7 can fix the horizontal ruler 5 on the vertical pole 6.

[0056] refer to Figure 2-Figure 4 , the working principle of the embodiment of the utility model is as follows:

[0057] Measurement of the tooth profile of the outer rotor 4: Try to fit the outer rotor 4 downward from the upper surface of the tooth profile module with a gap value of zero, find the tooth profile module 3 that the outer rotor 4 can just fit into, and read the tooth profile error value of the outer rotor 4 (determined by the marked gap value).

[0058] Measurement of the tooth direction of the outer rotor 4: continue to slide the outer rotor 4 downward on the toothed module 3 that just fits in. If the outer rotor 4 can completely penetrate the toothed module 3, it is considered that the tooth direction of the outer rotor 4 is good. If the outer rotor 4 is stuck at a certain height of the toothed module 3, it means that the tooth direction of the outer rotor 4 is unqualified. Lower the horizontal ruler 5 and read the height at which the outer rotor 4 is stuck from the height scale of the vertical rod 6.

[0059] The specific operation process is as follows:

[0060] Turn the wheel 2 to find the toothed module 3 with zero clearance, and then put the outer rotor 4 down from the toothed module 3. At this time, there are three specific situations:

[0061] In the first case, the outer rotor 4 can be easily inserted into the toothed module 3, that is, there is an obvious gap between the outer rotor 4 and the toothed module 3, then the outer rotor 4 is removed, the wheel disc 2 is rotated, and a smaller toothed module 3 is selected to continue the measurement. If there is still a gap between the smaller toothed module 3 and the outer rotor 4, the wheel disc 2 is continued to be rotated to select a smaller toothed module 3 until the toothed module 3 that the outer rotor 4 can just fit into is found. At this time, the gap between the outer rotor 4 and the toothed module 3 is zero, and the toothed error value of the outer rotor 4 can be determined by the spacing value marked on the wheel disc 2 next to the toothed module 3;

[0062] In the second case, the outer rotor 4 can just fit into the tooth profile module 3, that is, the gap between the outer rotor 4 and the tooth profile module 3 is zero, and the tooth profile error value of the outer rotor 4 is zero;

[0063] In the third case, the outer rotor 4 cannot be inserted into the tooth module 3 at all, that is, there is no gap between the outer rotor 4 and the tooth module 3, then rotate the wheel disc 2 and select a larger tooth module 3 to continue measuring. If the outer rotor 4 still cannot be inserted into the larger tooth module 3, continue to rotate the wheel disc 2 and select a larger tooth module 3 until the tooth module 3 that the outer rotor 4 can just fit into is found. At this time, the gap between the outer rotor 4 and the tooth module 3 is zero, and the tooth error value of the outer rotor 4 can be determined by the spacing value marked on the wheel disc 2 next to the tooth module 3.

[0064] After the above steps are completed, the tooth profile measurement of the outer rotor 4 is completed. The tooth direction measurement of the outer rotor 4 needs to be performed on the basis of the tooth profile measurement. When the tooth profile module 3 that can just fit the outer rotor 4 is found, the outer rotor 4 is continued to be inserted downwards. At this time, there are two situations:

[0065] In the first case, the outer rotor 4 can completely pass through the toothed module 3 to reach the bottom, and the tooth direction of the outer rotor 4 is considered qualified;

[0066] The second case is that the outer rotor 4 is stuck on the tooth module 3, that is, the outer rotor 4 can pass through a part of the tooth module 3, then it is considered that there is a draft angle or a small protrusion in the tooth direction of the outer rotor 4, indicating that the tooth direction of the outer rotor 4 is unqualified. The height of the outer rotor 4 stuck in the tooth module 3, the horizontal ruler 5 can be moved down along the vertical rod 6 to the bottom of the outer rotor 4, and then the horizontal ruler 5 is fixed to the vertical rod with a fastening screw 7. At this time, the height of the position where the tooth direction of the outer rotor 4 is unqualified can be read from the height scale of the vertical rod 6, and this height is the height of the unqualified tooth direction of the outer rotor 4. The tooth direction measurement of the outer rotor 4 is completed.

[0067] The above description is only an embodiment of the utility model, and is not intended to limit the scope of protection of the utility model. Any equivalent structural transformation made by using the contents of the utility model specification and drawings, or directly or indirectly applied in other related technical fields, is included in the patent protection scope of the utility model. For ordinary technicians in this field, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A device for measuring the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump, characterized in that: comprising a base (1); A deep groove ball bearing (8) is arranged on the base (1), the inner ring of the deep groove ball bearing (8) is fixedly connected to the base (1), and the outer ring is fixedly connected to the wheel disc (2); The wheel disc (2) is provided with at least three tooth modules (3) of different sizes; At least three of the tooth profile modules (3) include a standard module prepared according to the standard tooth profile of the outer rotor (4) to be tested, at least one non-standard module with the same shape and a proportionally enlarged size as the standard module, and at least one non-standard module with the same shape and a proportionally reduced size as the standard module, for measuring the tooth profile and tooth direction of the outer rotor (4) to be tested; A vertical rod (6) is arranged on the base (1) at the center of the deep groove ball bearing (8), and a horizontal ruler (5) is sleeved on the vertical rod (6). The horizontal ruler (5) can move to any position along the circumferential and axial directions of the vertical rod (6) and be fixed; The distance between the outer end of the horizontal ruler (5) and the vertical rod (6) is greater than the distance between the toothed module (3) farthest from the vertical rod (6) and the vertical rod (6); The vertical pole (6) is marked with a height scale.

2. According to claim 1, a device for measuring the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump, characterized in that: The central axes of at least three of the toothed modules (3) are distributed on the circumference of the wheel disc (2) at the radial 1 / 2 position, and are arranged in sequence counterclockwise or clockwise from small to large according to size.

3. The device for measuring the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump according to claim 2, characterized in that: The horizontal ruler rod (5) is fixed on the vertical rod (6) by means of a fastening screw (7), and the relative position of the horizontal ruler rod (5) on the vertical rod (6) is adjusted by loosening the fastening screw (7).

4. The device for measuring the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump according to claim 3, characterized in that: The position on the wheel disc (2) corresponding to the toothed module (3) is marked with a gap value, and the gap value refers to the difference between the toothed module (3) and the standard module. The gap value of the standard module is 0, the difference is greater than the gap value of the standard module is a positive value, and the difference is less than the gap value of the standard module is a negative value.

5. The device for measuring the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump according to claim 4, characterized in that: The horizontal ruler rod (5) comprises a rotating block sleeved on the vertical rod (6) and a rod body connected to the rotating block, and the fastening screw (7) is used to fix the rotating block on the vertical rod (6).

6. A device for measuring the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump according to claim 5, characterized in that: The base (1) comprises a support plate and a convex column arranged on the support plate; The top outer periphery of the protruding column is fixedly connected to the inner ring of the deep groove ball bearing (8); The vertical rod (6) is arranged at the top center position of the convex column.

7. A device for measuring the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump according to claim 2, characterized in that: Mounting columns adapted to the inner holes of the toothed modules (3) are provided on the circumference of the wheel disc (2) at the radial 1 / 2 position, the number of the mounting columns being consistent with the number of the toothed modules (3), and each toothed module (3) being mounted on a corresponding mounting column.

8. A device for measuring the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump according to claim 7, characterized in that: The at least three tooth profile modules (3) are specifically seven, including a standard module prepared according to the standard tooth profile of the outer rotor (4) to be tested, three non-standard modules with the same shape and proportionally enlarged sizes as the standard module, and three non-standard modules with the same shape and proportionally reduced sizes as the standard module.

9. A device for measuring the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump according to claim 8, characterized in that: The clearance values ​​of the seven tooth modules (3) are respectively +0.03mm, +0.02mm, +0.01mm, 0, -0.01mm, -0.02mm, and -0.03mm.

10. A device for measuring the tooth shape and tooth direction of the outer rotor of a cycloid rotor pump according to claim 9, characterized in that: The height scale of the vertical pole (6) is 0-50 mm.

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