Ball screw nut channel measuring device

Abstract

The utility model discloses a ball screw nut channel measuring device, which comprises a mounting seat, a sliding piece and a fixed piece are mounted on the mounting seat, the sliding piece can slide relative to the fixed piece, two positioning blocks are respectively and fixedly arranged on the sliding piece and the fixed piece, and the positioning blocks are arranged on the mounting seat. Two groups of balls are fixedly arranged on the two positioning blocks respectively, the two groups of balls are oppositely arranged, and the diameter of each ball is smaller than or equal to the depth of a nut channel; one side of the mounting seat is also provided with a dial gauge, the dial gauge is horizontally arranged, and the dial gauge is used for measuring the sliding distance of the sliding piece; the dial indicator can be used for measuring the sliding distance of the sliding piece relative to the fixed piece when the two groups of balls are respectively clamped in the nut channel, so that the depth of the nut channel can be accurately calculated.

Description

Technical Field

[0001] The utility model belongs to the field of testing ball screws, and specifically relates to a measuring device for the nut groove of a ball screw. Background Art

[0002] A ball screw is a mechanical transmission device that converts rotational motion into linear motion through the rolling contact of balls between the nut and the screw. The core components of a ball screw include the screw, the nut, and the balls. The balls roll in the nut grooves of the screw and the nut to achieve smooth transmission. The depth of the nut groove is an important parameter for measuring the accuracy of the ball screw.

[0003] For example, the "internal thread depth measuring device" disclosed in the patent document "CN104567612A" has a technical solution that includes a special measuring screw. The screw is provided with a scale H, and this scale H should be counted starting from the starting end of the thread. During use, the screw is screwed into the internal thread hole. When the screw cannot be screwed any further, the scale on the screw is observed to complete the measurement.

[0004] In this patent, the depth of the nut groove is measured by measuring the depth of the internal thread in the nut seat. In actual use, the screw of the ball screw and the nut seat mainly contact each other through the rolling of the balls. Therefore, the utility model proposes a structure for measuring the nut groove that is more in line with the working scenario of the ball screw. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a measuring device for the nut groove of a ball screw to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A measuring device for the nut groove of a ball screw includes a mounting base. A sliding member and a fixed member are mounted on the mounting base. The sliding member can slide relative to the fixed member. Two positioning blocks are respectively and fixedly arranged on the sliding member and the fixed member. Two groups of balls are respectively and fixedly arranged on the two positioning blocks, and the two groups of balls are arranged oppositely;

[0008] The nut seat to be measured is sleeved on the two positioning blocks. The diameter of the balls is less than or equal to the depth of the nut groove;

[0009] A dial indicator is further arranged on one side of the mounting base. The dial indicator is horizontally arranged and is used to measure the sliding distance of the sliding member.

[0010] As a further technical solution, the two groups of balls are aligned in the horizontal direction.

[0011] Further technical solution: The sliding member includes a slider and a slide table. The slide table is fixedly installed on the slider. A slide rail is installed on the mounting seat. The length direction of the slide rail is horizontal. The slide table is slidably connected to the slide rail. The positioning block is installed on the slide table.

[0012] Further technical solution: A spring is arranged between the fixing member and the slide table. A first avoidance groove is formed on the fixing member, and a second avoidance groove is formed on the slide table. One end of the spring is fixedly connected to the bottom of the first avoidance groove, and the other end of the spring is fixedly connected to the bottom of the second avoidance groove.

[0013] Further technical solution: A handle is fixedly arranged on one side of the slide table.

[0014] Further technical solution: There are also two limit blocks. A fixing groove is formed at one end of the limit block facing the positioning block. The fixing groove can be clamped with the two positioning blocks. A spherical groove is formed on the groove wall of the limit block. A part of the ball is located in the spherical groove. A pressing block is arranged on one side of the two limit blocks. The pressing block is detachably connected to the two limit blocks.

[0015] Further technical solution: A limit hole is formed on the side plate of the mounting seat facing the dial indicator. The dial indicator passes through the limit hole, and the position of the dial indicator relative to the mounting seat is fixed.

[0016] Advantages of the present utility model:

[0017] The present utility model provides a sliding member that can slide relative to a fixing member. Two positioning blocks are respectively and fixedly arranged on the sliding member and the fixing member, so that one positioning block can slide relative to the positioning block on the fixing member. Two groups of balls are respectively and fixedly arranged on the two positioning blocks. When it is necessary to measure the depth of the nut groove on the nut seat, first slide the sliding member until the two positioning blocks are in contact, then sleeved the nut seat outside the two positioning blocks, and then slide the sliding member again, and the nut seat can be rotated so that the two groups of balls are respectively clamped in the nut groove; A dial indicator is also arranged on one side of the mounting seat. The dial indicator is horizontally arranged. Using the dial indicator can measure the distance that the sliding member slides relative to the fixing member when the two groups of balls are respectively clamped in the nut groove, and then accurately calculate the depth of the nut groove.

[0018] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. Description of the drawings

[0019] Figure 1 : Overall structural schematic diagram of the present utility model.

[0020] Figure 2: Assembly drawing of the overall structure of the present utility model for the nut seat to be measured.

[0021] Figure 3 : Cross-sectional view of the present utility model after hiding the spring.

[0022] Figure 4 : Cross-sectional view of the second embodiment of the present utility model.

[0023] Figure 5 : Assembly drawing of the limit block, pressing block and positioning block of the present utility model.

[0024] Reference numerals: 1, mounting seat; 2, slide rail; 3, sliding member; 31, slider; 32, slide table; 4, fixing member; 6, handle; 7, positioning block; 8, nut seat to be measured; 9, ball; 10, nut groove; 11, micrometer; 12, spring; 13, first avoidance groove; 14, second avoidance groove; 15, limit block; 16, pressing block Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0026] Please refer to Figures 1-5 ;

[0027] Embodiment 1:

[0028] A ball screw nut groove measuring device includes a mounting base 1. Inside the mounting base 1, there is a slide rail 2 with a horizontal length direction. The two ends of the slide rail 2 are in contact with the side walls on both sides inside the mounting base 1. On the slide rail 2, there are a sliding member 3 and a fixing member 4. In this embodiment, the fixing member 4 is fixedly connected to the mounting base 1, and the fixing member 4 is installed on one side of the mounting base 1. The sliding member 3 can slide horizontally relative to the fixing member 4. The sliding member 3 is slidably connected to the slide rail 2. Preferably, the sliding member 3 is a slider 31 and a slide table 32. The slider 31 is slidably connected to the slide rail 2. Preferably, the slide rail 2 can be a dovetail slide rail 2, and correspondingly, the slider 31 is a dovetail slider 31. The movement of the slider 31 can drive the movement of the slide table 32. At the same time, the movement of the slide table 32 can drive the movement of the slider 31. Therefore, a handle 6 is provided on the slide table 32, enabling the operator to drive the slide table 32 to slide through the handle 6; the slide table 32 can move horizontally relative to the fixing member 4. Two positioning blocks 7 are respectively and fixedly provided on the fixing member 4 and the slide table 32. The two positioning blocks 7 are placed vertically. In this embodiment, the two positioning blocks 7 are "L"-shaped blocks. When the slide table 32 abuts against the fixing member 4, the side walls of the two positioning blocks 7 are in contact with each other, enabling the nut seat 8 to be measured to be sleeved on the two positioning blocks 7 with the side walls in contact. Two groups of balls 9 are respectively and fixedly provided on the two positioning blocks 7. In this embodiment, the balls 9 are integrally formed with the positioning blocks 7. In other embodiments, the balls 9 can be fixedly connected to the positioning blocks 7 by welding. The two groups of balls 9 are arranged oppositely. The number of one group of balls 9 is not limited, and it is based on the distance between several balls 9 so that the balls 9 can be engaged in the nut groove 10. Preferably, in this embodiment, the number of one group of balls 9 is preferably two. A gap is maintained between the two balls 9 so that the two balls 9 can be simultaneously stuck in the nut groove 10. And the height of one ball 9 in one group of balls 9 is the same as the height of one ball 9 in the other group of balls 9 in the horizontal direction. And the diameter of the balls 9 is less than or equal to the depth of the nut groove 10, so that the side of the balls 9 facing the nut groove 10 can be in contact with the nut groove 10; on one side of the mounting base 1, there is also a micrometer 11. A limiting hole is opened on the side plate of the mounting base 1 facing the micrometer 11. The horizontally arranged micrometer 11 passes through the limiting hole, so that the position of the micrometer 11 relative to the mounting base 1 is fixed, and the side head of the micrometer 11 can be in contact with the slide table 32.

[0029] Specifically, in the first step, when using this structure to measure the depth of the nut groove 10 of the nut seat, the operator can first adjust the position of the slide table 32 through the handle 6, slide the slide table 32 to abut against the side of the fixing member 4, and at this time, the side walls of the two positioning blocks 7 are in contact, and then sleeve the nut seat 8 to be measured on the two positioning blocks 7.

[0030] In the second step, the operator manually slides away from the sliding table 32. During the sliding process, observe whether the ball 9 is caught between the nut groove 10 of the nut seat 8 to be measured and the positioning block 7. If the ball 9 is caught between the side wall of the nut seat and the positioning block 7, the operator needs to rotate the nut seat so that the ball 9 on the positioning block 7 is caught in the nut groove 10 of the nut seat 8 to be measured, in order to measure the depth of the nut groove 10.

[0031] In the third step, the sliding table 32 close to the micrometer 11 touches the micrometer 11 under the external force applied by the operator and forms a value on the micrometer 11. The observer needs to read the value and calculate the depth of the nut groove 10 based on the diameters of the ball 9 and the positioning block 7.

[0032] Embodiment 2:

[0033] The structure of this embodiment is the same as that of Embodiment 1.

[0034] The difference between this embodiment and Embodiment 1 is:

[0035] To further facilitate the use by the operator, a number of springs 12 are provided between the fixing member 4 and the sliding table 32. After the operator sleeved the nut seat 8 to be measured on the two positioning blocks 7, the operator can release both hands, and the sliding table 32 is slid away by the deformation of the spring 12 until both groups of balls 9 are in contact with the nut groove 10. Specifically, in this embodiment, preferably one spring 12 is provided. Correspondingly, the fixing member 4 is provided with a first avoidance groove 13, and the sliding table 32 is provided with a second avoidance groove 14. The first avoidance groove 13 communicates with the second avoidance groove 14. One end of the spring 12 is fixedly connected to the bottom of the first avoidance groove 13, and the other end of the spring 12 is fixedly connected to the bottom of the second avoidance groove 14.

[0036] During use, in the first step, when using this structure to measure the depth of the nut groove 10 of the nut seat, the operator can first adjust the position of the sliding table 32 through the handle 6, and slide the sliding table 32 until the side wall of the fixing member 4 abuts against the side surface of the sliding table 32, that is, the spring 12 between the fixing member 4 and the sliding table 32 is compressed into the first avoidance groove 13 and the second avoidance groove 14. At this time, the side walls of the two positioning blocks 7 abut, and the nut seat 8 to be measured is sleeved on the two positioning blocks 7.

[0037] In the second step, the operator releases the handle 6. When the spring 12 resumes deformation, the sliding table 32 will bounce under the elastic force of the spring 12. At the same time, observe whether the ball 9 is caught between the groove of the nut seat 8 to be measured and the positioning block 7. If the ball 9 is caught between the side wall of the nut seat and the positioning block 7, the operator needs to rotate the nut seat so that the ball 9 on the positioning block 7 is caught on the nut groove 10 of the nut seat 8 to be measured, in order to measure the depth of the nut groove 10.

[0038] In the third step, the slide table 32 close to the dial indicator 11 touches the dial indicator 11 under the elastic force of the spring 12 and forms a value on the dial indicator 11. The observer needs to read the value and calculate the depth of the nut groove 10 based on the diameters of the ball 9 and the positioning block 7.

[0039] Embodiment 3:

[0040] The structure of this embodiment is the same as that of Embodiment 2.

[0041] The difference between this embodiment and Embodiment 2 is as follows:

[0042] In order to keep the side wall of the slide table 32 in contact with the fixing member 4 when the structure is not needed to measure the depth of the nut groove 10 of the nut seat, this embodiment further includes two limiting blocks 15 arranged opposite to the positioning blocks 7. A fixing groove is formed on the side of the limiting block 15 facing the positioning block 7. The width of the fixing groove is greater than the widths of the two positioning blocks 7, so that the fixing groove can be clamped with the two positioning blocks 7. A spherical groove is formed on the groove wall of the limiting block 15, and a part of the ball 9 is located in the spherical groove. A pressing block 16 is arranged on one side of the two limiting blocks 15. The pressing block 16 is detachably connected to the two limiting blocks 15. In this embodiment, the connection method between the pressing block 16 and the limiting blocks 15 is not limited. In this embodiment, it is preferably bolted connection.

[0043] During use, when the structure is not needed to measure the depth of the nut groove 10 of the nut seat, the operator first slides the slide table 32 until it abuts against the two positioning blocks 7. The two positioning blocks 7 can be fixed by the two limiting blocks 15. At the same time, the pressing block 16 is bolted to the two limiting blocks 15, so that the limiting blocks 15 can be fixed.

[0044] Embodiment 4;

[0045] The structure of this embodiment is the same as that of Embodiment 3.

[0046] This embodiment provides another implementation method:

[0047] When the operator uses it, the nut seat 8 to be measured can be sleeved on the two positioning blocks 7, and then the handle 6 is released. Under the natural extension of the spring 12, the elastic force will drive the slide table 32 to move towards the dial indicator 11, and then drive the positioning block 7 to move towards the position of the dial indicator 11. The depth of the nut groove 10 is calculated by reading the measurement value of the dial indicator 11. At this time, the reading of each dial indicator 11 corresponds to the depth of one place of the nut groove 10. The operator rotates the nut seat so that the ball 9 can be in contact with multiple places of the nut groove 10 respectively, so as to measure the depths of multiple positions of the nut groove 10.

[0048] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0049] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A ball screw nut raceway measuring device, comprising a mounting seat (1), characterized in that: A sliding member (3) and a fixing member (4) are mounted on the mounting seat (1); the sliding member (3) can slide relative to the fixing member (4); two positioning blocks (7) are fixedly arranged on the sliding member (3) and the fixing member (4); two groups of balls (9) are fixedly arranged on the two positioning blocks (7); the two groups of balls (9) are arranged opposite to each other; The nut seat (8) to be measured is sleeved on the two positioning blocks (7), and the diameter of the ball (9) is less than or equal to the depth of the nut groove (10); A micrometer (11) is also provided on one side of the mounting seat (1). The micrometer (11) is arranged horizontally and is used to measure the sliding distance of the sliding member (3).

2. A ball screw nut groove measuring device according to claim 1, characterized in that: The two groups of balls (9) are aligned in the horizontal direction.

3. A ball screw nut groove measuring device according to claim 2, characterized in that: The sliding member (3) comprises a slider (31) and a slide table (32); the slide table (32) is fixedly mounted on the slider (31); a slide rail (2) is mounted on the mounting seat (1); the length direction of the slide rail (2) is horizontal; the slide table (32) is slidably connected to the slide rail (2); and the positioning block (7) is mounted on the slide table (32).

4. A ball screw nut groove measuring device according to claim 3, characterized in that: A spring (12) is arranged between the fixing member (4) and the slide (32); a first avoidance groove (13) is provided on the fixing member (4); a second avoidance groove (14) is provided on the slide (32); one end of the spring (12) is fixedly connected to the bottom of the first avoidance groove (13); and the other end of the spring (12) is fixedly connected to the bottom of the second avoidance groove (14).

5. A ball screw nut groove measuring device according to claim 3, characterized in that: A handle (6) is fixedly provided on one side of the slide (32).

6. A ball screw nut groove measuring device according to claim 1, characterized in that: The invention also comprises two limit blocks (15), one end of the limit block (15) facing the positioning block (7) is provided with a fixing groove, the fixing groove can be snap-connected with the two positioning blocks (7), the groove wall of the limit block (15) is provided with a spherical groove, a part of the ball (9) is located in the spherical groove, and a pressing block (16) is provided on one side of the two limit blocks (15), and the pressing block (16) is detachably connected to the two limit blocks (15).

7. A ball screw nut groove measuring device according to claim 1, characterized in that: The mounting seat (1) is provided with a limiting hole on a side plate facing the micrometer (11); the micrometer (11) passes through the limiting hole; and the position of the micrometer (11) is fixed relative to the mounting seat (1).

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