A mobile support device for a ball screw dynamic stroke measuring instrument

Abstract

The utility model relates to the technical field of screw support mechanisms, and specifically to a mobile support device for a ball screw dynamic stroke measuring instrument. The mobile support device includes a linear motor, a sliding mechanism, and several groups of support components. The linear motor is a multi-motor motor, and several groups of support components are controlled by one linear motor. The sliding mechanism includes a guide rail and a slide seat. Each group of support components includes a support base and a support block. The slide seat is slidably connected to the guide rail, the support base is fixedly arranged on the slide seat, and the support block is movably mounted on the support base for supporting the screw. The linear motor is used to drive several support components to slide back and forth along the length direction of the guide rail. The utility model effectively solves the problem that the bending deformation of the measuring section cannot be effectively controlled during the measurement of the ball screw, especially in the measurement of the long-distance screw. The problem of large measurement errors caused by the bending deformation ensures the measurement accuracy and the reliability of the measurement data.

Description

Technical Field

[0001] The utility model relates to the technical field of screw support mechanisms, in particular to a mobile support device for a ball screw dynamic stroke measuring instrument. Background Art

[0002] At present, the ball screw dynamic stroke measuring instrument needs to drive the probe to move and measure the dynamic stroke of the screw by rotating the screw during operation.

[0003] The existing Chinese patent with announcement number CN204711650U discloses a screw follower support mechanism. The screw follower support mechanism includes two linear guides placed on the same horizontal plane and parallel to the screw, a follower slider mounted on the linear guide, a left support frame and a right support frame installed transversely on the two linear guide follower sliders, a connecting rod connecting the left support frame and the right support frame, a support block for supporting the screw arranged in the middle of the top of the left support frame and the right support frame, a screw nut mounted on the screw and located between the left support frame and the right support frame, a left top block and a right top block arranged on the two end surfaces of the screw nut, and a limit block arranged on the inner side of the bearing seat at both ends of the screw. This patent can effectively reduce the sagging amount of the long screw and improve the running accuracy of the screw.

[0004] The dynamic stroke measuring instrument of ball screw has a high requirement for reducing the bending deformation of the measuring part of the screw. The above patent adopts fixed support, and the bending deformation of the measuring section cannot be effectively controlled during measurement. Especially in the measurement of long-distance screws, the measurement error caused by the bending deformation is large. Therefore, it is urgent to provide a new mobile support device. Utility Model Content

[0005] The utility model aims to provide a mobile supporting device for a ball screw dynamic stroke measuring instrument to solve the problems existing in the prior art.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a mobile support device for a ball screw dynamic stroke measuring instrument, the mobile support device comprising a linear motor, a sliding mechanism and a plurality of support components, the linear motor is a multi-motor motor, and the plurality of support components are controlled by one linear motor; the linear motor is used to drive the plurality of support components to slide back and forth along the length direction of the sliding mechanism; the sliding mechanism comprises a guide rail and a slide seat, and the slide seat is slidably connected to the guide rail; each group of support components comprises a support base and a support block, the support base is fixedly arranged on the slide seat, and the support block is movably mounted on the support base, and is used to support the screw.

[0007] Through the above technical solution, multiple-motor linear motors and multiple groups of support components, better mobile support for long-distance lead screws is achieved, thereby improving measurement accuracy.

[0008] Furthermore, the linear motor includes a linear motor stator and a plurality of linear motor movers, and the slide is fixedly connected to one of the linear motor movers.

[0009] Through the above technical solution, a connection method between the linear motor and the slide is provided.

[0010] Furthermore, the linear motor simultaneously drives 2 to 3 of the support assemblies to move independently.

[0011] Through the above technical solution, the use efficiency of the linear motor can be improved.

[0012] Furthermore, the support assembly further includes a connecting plate, and the connecting plate is used for supporting the transitional connection between the base and the slide.

[0013] Through the above technical solution, the connecting plate provides stability for the installation of the support base.

[0014] Furthermore, the support base includes a left support seat and a right support seat, and there are two support blocks provided on the support block of each group of support assemblies. The two support blocks are respectively installed on the inner side of the V-shaped surface formed by the left support seat and the right support seat to jointly support the lead screw.

[0015] Through the above technical solution, the V-shaped surface and the support blocks of the support base can provide more stable clamping for the lead screw.

[0016] Furthermore, a regulating rod is provided on one side of each support block away from the lead screw for regulating the gap between two adjacent support blocks.

[0017] Through the above technical solution, the regulating rod is used to adjust the size of the gap between the two support blocks to realize the support of the support blocks for lead screws of different specifications.

[0018] Furthermore, one of the connection methods between the regulating rod and the support block is: the regulating rod includes a rotating part, a fixing part and a threaded part; the rotating part of the regulating rod is located outside the left support seat or the right support seat; the fixing part of the regulating rod is installed inside the left support seat or the right support seat through a bearing; a fixing frame is further provided inside the left support seat or the right support seat, and the threaded part of the regulating rod is rotationally connected to the inner wall of the fixing frame. The fixing frame is a "U" - shaped structure, and the two ends of the fixing frame fix the support block.

[0019] Through the above technical solution, a method for connecting the adjusting rod and the support block is provided. The mobile support device includes but is not limited to the above connection method and can also be other connection methods, for example, a flange is used instead of a bearing to install the fixing part of the adjusting rod on the left support seat or the right support seat. The fixing frame is used to provide a mounting point for the support block and facilitate the support block to rotate with the screw rod.

[0020] Furthermore, the support block adopts a roller structure, which is suitable for rotating with the ball screw during dynamic stroke measurement of the ball screw.

[0021] Through the above technical solution, the roller structure is convenient for installation on the one hand, and convenient for follow-up on the other hand.

[0022] Furthermore, the guide rail is an air-floating guide rail.

[0023] Through the above technical solution, the air-floating guide rail uses compressed air to make the slide relatively suspended, achieving smooth movement without friction and vibration, and thus achieving high-precision guidance.

[0024] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0025] The utility model realizes the effect of driving multiple supporting components to move independently and better supporting long-distance lead screws, thereby improving the measurement accuracy, through a multi-motor linear motor and multiple slides;

[0026] The utility model realizes the effect of supporting screw rods of different specifications by adjusting the rod and the support block, and reduces the influence of the friction between the screw rod and the support assembly on the measurement accuracy.

[0027] The utility model realizes the effects of stably supporting the screw rod and reducing deviation through the V-shaped surface formed by the left supporting seat and the right supporting seat and the two supporting blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 is a schematic side view of the mobile support device of Example 1;

[0030] Figure 2 It is a schematic diagram of the support assembly installation structure of Example 1.

[0031] In the figure, 1. linear motor; 11. linear motor mover; 12. linear motor stator; 2. guide rail; 3. support assembly; 31. slide seat; 33. support base; 331. left support seat; 332. right support seat; 34. support block; 35. fixing frame; 36. adjustment rod; 4. screw rod. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0033] like Figure 1 and Figure 2 As shown, this embodiment 1 discloses a mobile support device for a ball screw dynamic stroke measuring instrument, which includes a multi-motor linear motor 1, an air-floating guide rail 2, 2-3 slides 31 and 2-3 groups of support assemblies 3. The 2-3 slides 31 are all installed on the air-floating guide rail 2, and a support assembly 3 is installed on each slide 31. The 2-3 groups of support assemblies 3 are controlled by the same multi-motor linear motor 1 to move independently. The utility model includes but is not limited to a multi-motor linear motor 1 and 2-3 groups of support assemblies 3, and can also include two multi-motor linear motors 1 and 4-6 groups of support assemblies 3, and so on.

[0034] like Figure 2As shown in the figure, each set of support components 3 includes a sliding seat 31, a support base 33, a support block 34, a fixing frame 35 and an adjusting rod 36. The support base 33 is fixed to the upper surface of the sliding seat 31. The support base 33 includes a left support seat 331 and a right support seat 332. The left support seat 331 and the right support seat 332 form a V-shaped surface for the lead screw 4 to pass through and limit the lead screw 4 to a certain extent. Installation grooves for the support block 34 and the fixing frame 35 are provided on the inner sides of the tops of the left support seat 331 and the right support seat 332 that face each other. Through holes for the adjusting rod 36 to pass through are provided on the bottom surfaces of the left support seat 331 and the right support seat 332, and the through holes are communicated with the installation grooves. The fixing frame 35 is in a "U" shape, and both ends of the support block 34 are rotatably connected to both ends of the fixing frame 35. The fixing frame 35 with the support block 34 is placed in the installation grooves on the tops of the left support seat 331 and the right support seat 332. The adjusting rod 36 includes a rotating part, a fixing part and a threaded part: the rotating part of the adjusting rod 36 is located outside the left support seat 331 or the right support seat 332, which is convenient for the staff to operate and rotate the adjusting rod 36; the fixing part of the adjusting rod 36 is installed inside the left support seat 331 or the right support seat 332 through a bearing, so that the adjusting rod 36 can be fixed and rotate; the threaded part of the adjusting rod 36 penetrates through the through hole on the bottom surface of the left support seat 331 and the right support seat 332 and is threadedly connected to the inner wall of the bottom of the fixing frame 35. When the user rotates the rotating part 361 of the adjusting rod 36, the adjusting rod 36 remains stationary, and the fixing frame 35 moves back and forth along the threaded part 363 of the adjusting rod 36, playing a role in adjusting the position of the support block 34. The installation of the adjusting rod includes, but is not limited to, the above connection method, and other connection methods can also be used. For example, a flange can be used to replace the bearing. The support block 34 adopts a roller structure, which is convenient for rotating with the lead screw during the dynamic stroke measurement of the ball screw.

[0035] As Figure 2 shown in the figure, the linear motor 1 includes a linear motor stator 12 and two to three linear motor movers 11, and the sliding seat 31 is fixedly connected to one of the linear motor movers 11. The linear motor 1 is controlled by the on-line system of the ball screw dynamic stroke measuring instrument. When the ball screw dynamic stroke measuring instrument starts to work, it sends an instruction to command the linear motor 1 to work. The linear motor 1 drives the sliding seat 31, and the sliding seat 31 drives the support assembly 3 to reciprocate along the length direction of the air floating guide rail 2.

[0036] The operating principle of this Embodiment 1 is as follows: First step, each set of support components 3 is in the initial position, and the adjusting rod 36 is rotated to adjust the support block 34 until the roller surface of the support block 34 is in good contact with the lead screw 4; Second step, after the measurement starts, the multi-mover linear motor 1 drives multiple support components 3 to move independently following the ball screw dynamic stroke measuring instrument to support the lead screw 4.

[0037] In summary, the design of the mobile multi-support assembly of the utility model effectively solves the problem that the bending deformation of the measuring section cannot be effectively controlled when measuring the ball screw, especially in the measurement of long-distance screws, the measurement error caused by the bending deformation is large, and ensures the measurement accuracy and reliability of the measurement data. The utility model is particularly suitable for the mobile support of long-distance ball screws.

[0038] The above describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A mobile support device for a ball screw dynamic stroke measuring instrument, characterized in that: The mobile support device comprises a linear motor (1), a sliding mechanism and a plurality of support assemblies (3), wherein the linear motor (1) is a multi-motor motor, and the plurality of support assemblies (3) are controlled by one of the linear motors (1); the linear motor (1) is used to drive the plurality of support assemblies (3) to slide back and forth along the length direction of the sliding mechanism; the sliding mechanism comprises a guide rail (2) and a slide seat (31), and the slide seat (31) is slidably connected to the guide rail (2); each group of support assemblies (3) comprises a support base (33) and a support block (34), wherein the support base (33) is fixedly arranged on the slide seat (31), and the support block (34) is movably mounted on the support base (33) and is used to support a screw rod (4).

2. The mobile support device for the ball screw dynamic stroke measuring instrument according to claim 1, characterized in that: The linear motor (1) comprises a linear motor stator (12) and a plurality of linear motor movers (11), and the slide seat (31) is fixedly connected to one of the linear motor movers (11).

3. The mobile support device for the ball screw dynamic stroke measuring instrument according to claim 2, characterized in that: The linear motor (1) simultaneously drives two to three of the support components (3) to move independently.

4. The mobile support device for the ball screw dynamic stroke measuring instrument according to claim 1, characterized in that: The support base (33) comprises a left support seat (331) and a right support seat (332), and each group of the support components (3) is provided with two support blocks (34). The two support blocks (34) are respectively mounted on the inner side of a V-shaped surface formed by the left support seat (331) and the right support seat (332), and jointly support the screw rod (4).

5. The mobile support device for the ball screw dynamic stroke measuring instrument according to claim 4, characterized in that: Each support block (34) is provided with an adjustment rod (36) on a side away from the screw rod (4) for adjusting the gap between two adjacent support blocks (34).

6. The mobile support device for the ball screw dynamic stroke measuring instrument according to claim 5, characterized in that: The support block (34) adopts a roller structure and is suitable for rotating with the screw (4) when measuring the dynamic stroke of the ball screw.

7. The mobile support device for the ball screw dynamic stroke measuring instrument according to claim 1, characterized in that: The guide rail (2) is an air-floating guide rail.

Images