Automatic centering device for test block
The automatic centering device for concrete test blocks solves the problem of concrete test blocks deviating from the center by using a pushing mechanism and a screw slide system. It achieves precise positioning and efficient adjustment, adapts to test blocks of different sizes and shapes, and reduces adjustment difficulty and cost.
Patent Information
- Application Number
- CN202423140382.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-19
AI Technical Summary
The concrete test block deviates from the center position under the pressure machine, resulting in inaccurate test results. Moreover, the adjustment process is time-consuming and labor-intensive, which is difficult for ordinary users to complete, thus increasing costs.
Design an automatic test block centering device. Utilize a push mechanism with equally distributed angles and a lead screw slide system driven by a stepper motor to achieve precise positioning of the test block. The synchronous movement of the push mechanism will cause the center of the test block to coincide with the intersection point.
It achieves precise positioning of test blocks, adapts to different sizes and shapes, reduces adjustment time and cost, and improves the accuracy of test results.
Smart Images
Figure CN223727531U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to test equipment technical field especially, relates to a test block automatic centering device. BACKGROUND
[0002] In recent years, the concrete constant loading pressure testing machine applies the robot to carry out automatic feeding and discharging and becomes the new development direction in the industry. In the test process, due to the running error of the robot or the displacement of the testing machine because of vibration and other factors, the concrete test block is placed to the lower pressing plate of the press by the robot, and the center position is deviated, which affects the accuracy of the test result, and even the dangerousness caused by the eccentric load occurs. At this time, the positioning coordinates of the robot automatic test system need to be adjusted by the debugging personnel. The re-adjustment process is time-consuming and laborious, has certain technical difficulty, ordinary users can not complete it, and the manufacturer needs to operate, which is high in cost for the user and affects production. CONTENT OF THE UTILITY MODEL
[0003] The technical problem to be solved by the utility model is to overcome the defects in the prior art, and the utility model provides a test block automatic centering device, which is repositioned after the test block is placed on the pressing plate, ensures positioning to the fixed position and eliminates the accumulated error of the position.
[0004] To solve the above technical problems, the utility model adopts the technical scheme of a test block automatic centering device, characterized by comprising a lower pressing plate and an even number of pushing mechanisms distributed at equal angles on the lower pressing plate, and the movement routes of the even number of pushing mechanisms intersect at a point on the pressing plate.
[0005] Further, the pushing mechanism comprises a stepping motor, a lead screw and a sliding table, the sliding table can reciprocate along the length direction of a sliding rail fixed on the pressing plate, the lead screw is driven to rotate by the stepping motor, the sliding table is movably fixed on the lead screw, and a push plate is fixed on the side of the sliding table away from the stepping motor.
[0006] Further, an active sleeve is fixed on the side of the sliding table facing the lead screw, and a thread matched with the outer edge of the lead screw is arranged on the inner side of the active sleeve; a stroke groove is formed in the active sleeve in the axial direction of the active sleeve, and the length of the stroke groove is less than the length of the sliding table.
[0007] Further, it further comprises a limiting block, and the limiting block is fixed on the end of the lead screw facing the sliding table and can contact the inner wall of the stroke groove.
[0008] Further, the pushing mechanisms are all controlled by a control terminal to control the pushing amount and the pushing speed.
[0009] Further, the number of the pushing mechanisms is four, including a first pushing mechanism, a second pushing mechanism, a third pushing mechanism and a fourth pushing mechanism, the first pushing mechanism, the second pushing mechanism, the third pushing mechanism and the fourth pushing mechanism are arranged on the pressing plate in a clockwise manner, the first pushing mechanism and the third pushing mechanism are oppositely arranged, the second pushing mechanism and the fourth pushing mechanism are oppositely arranged, and the movement routes of the first pushing mechanism and the second pushing mechanism are perpendicular to each other.
[0010] Further, a short pushing plate is fixedly arranged on the first pushing mechanism and the third pushing mechanism, the width of the short pushing plate is the same as the width of the sliding table, a long pushing plate is fixedly arranged on the second pushing mechanism and the fourth pushing mechanism, and the width of the long pushing plate is greater than the width of the sliding table.
[0011] Compared with the prior art, the beneficial effects of the present application include: the test block automatic centering device compensates for the error of the compensation system, realizes accurate positioning of the test block position, and can also adapt to the positioning process of test blocks of different sizes and shapes. BRIEF DESCRIPTION OF DRAWINGS
[0012] The disclosure of the present application will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the present application. In the drawings, the same reference numerals are used to refer to the same parts. Among them:
[0013] Figure 1 The overall structure of the test block automatic centering device is schematically shown;
[0014] Figure 2 The overall structure of the pushing mechanism is schematically shown.
[0015] Reference numerals in the drawings: 1 - lower pressing plate, 2 - first pushing mechanism, 3 - second pushing mechanism, 4 - third pushing mechanism, 5 - fourth pushing mechanism, 6 - control terminal, 7 - stepper motor, 8 - lead screw, 9 - sliding table, 10 - pushing plate, 11 - movable sleeve, 12 - stroke groove, 13 - limit block. DETAILED DESCRIPTION
[0016] It is easy to understand that according to the technical scheme of the present application, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the present application. Therefore, the following specific embodiments and drawings are only exemplary description of the technical scheme of the present application, and should not be regarded as the whole or as the limitation or restriction of the technical scheme of the present application.
[0017] As Figure 1As shown in the figure, an automatic centering device for test block includes a pressing plate 1 and an even number of pushing mechanisms arranged at equal angles on the pressing plate 1, and the movement routes of the even number of pushing mechanisms intersect at a point on the pressing plate. Through the synchronous movement of the even number of pushing mechanisms arranged at equal angles, the regular even polygon test block can be fixed and positioned at the intersection point of the movement routes, so that the center position of the test block coincides with the intersection point position.
[0018] As shown in the figure, the pushing mechanism includes a stepping motor 7, a lead screw 8, and a sliding table 9. The sliding table 9 can reciprocate along the length direction of the sliding rail fixed on the pressing plate. The lead screw 8 is driven to rotate by the stepping motor 7. The sliding table 9 is movably fixed on the lead screw 8. A push plate 10 is fixed on the side of the sliding table 9 away from the stepping motor 7. The push plate 10 is in contact with the test block and is used to push the test block. Figure 2
[0019] An activity sleeve 11 is fixed on the side of the sliding table 9 facing the lead screw 8. A thread matching the outer edge of the lead screw 8 is arranged on the inner side of the activity sleeve 11. A stroke groove 12 is arranged in the activity sleeve 11 along the axial direction of the activity sleeve 11. The length of the stroke groove 12 is less than the length of the sliding table 9. A limiting block 13 is fixed on the end of the lead screw 8 facing the sliding table 9 and can be in contact with the inner wall of the stroke groove 12. The stroke groove 12 can limit the maximum pushing position of the pushing mechanism. For the test block with a smaller size, the position is the final positioning position. For the test block with a larger size, the final positioning position can be determined during the movement of the pushing device in the length range of the stroke groove 12. The limiting block 13 can prevent the lead screw 8 from continuing to rotate after the sliding table 9 moves to the limit position and thus escapes from the stroke groove 12. The pushing mechanism is controlled by the control terminal 6 to control the pushing amount and the pushing speed.
[0020] The functions and settings of the automatic centering device for test block are described in detail below.
[0021] Example 1
[0022] An automatic centering device for test block includes a pressing plate and a pushing mechanism arranged on the pressing plate. The number of pushing mechanisms is four, including a first pushing mechanism 2, a second pushing mechanism 3, a third pushing mechanism 4, and a fourth pushing mechanism 5. The first pushing mechanism 2, the second pushing mechanism 3, the third pushing mechanism 4, and the fourth pushing mechanism 5 are arranged on the pressing plate in a clockwise manner. The first pushing mechanism 2 and the third pushing mechanism 4 are arranged opposite to each other. The second pushing mechanism 3 and the fourth pushing mechanism 5 are arranged opposite to each other. The movement routes of the first pushing mechanism 2 and the second pushing mechanism 3 are perpendicular to each other.
[0023] The short push plate 10 is fixed on the first push mechanism 2 and the third push mechanism 4, and the width of the short push plate 10 is the same as the width of the sliding table 9. The long push plate 10 is fixed on the second push mechanism 3 and the fourth push mechanism 5, and the width of the long push plate 10 is greater than the width of the sliding table 9. The length of the long push plate 10 is not more than the length of the lower pressing plate 1, the length of the short push plate 10 is not more than 100 mm, and the width of the push plate 10 is not more than 100 mm.
[0024] The working process is as follows:
[0025] 1) The robot device places the concrete test block on the lower pressing plate 11, and at this time, the position of the test block can not be exactly between the first push mechanism 2, the second push mechanism 3, the third push mechanism 4 and the fourth push mechanism 5 of the lower pressing plate 1.
[0026] 2) The sliding table 9 controller 6 inquires the size information of the current test block from the robot automatic test system.
[0027] 3) The sliding table 9 controller 6 controls the second push mechanism 3 and the fourth push mechanism 5 to push the long push plate 10 to the center position, and adjusts the displacement of the movement according to the size of the test block. Finally, the position of the left and right push plates 10 is greater than the length of the test block by about 1 mm, and the gap is adjustable. And the test block is in the middle position of the lower pressing plate 11 in the left and right directions, and at this time, the left and right positions of the test block are successfully positioned.
[0028] 4) The sliding table 9 controller 6 controls the first push mechanism 2 and the third push mechanism 4 to push the short push plate 10 to the center position, and adjusts the displacement of the movement according to the size of the test block. Finally, the position of the front and rear push plates 10 is greater than the length of the test block by about 1 mm, and the gap is adjustable. And the test block is in the middle position of the lower pressing plate 11 in the front and rear directions, and at this time, the front and rear positions of the test block are successfully positioned.
[0029] 5) After the front, rear, left and right positions of the test block are successfully positioned, the sliding table 9 controller 6 controls the first push mechanism 2, the second push mechanism 3, the third push mechanism 4 and the fourth push mechanism 5 to return to the initial position. The sliding table 9 controller 6 informs the robot automatic test system that the test block loading test can be performed.
[0030] In the foregoing embodiment, the number of push mechanisms can also be odd, and the number is at least three. The number of push mechanisms is determined according to the shape and structure of the test block (i.e. the number of edges constituting the test block). The arrangement of the push mechanisms needs to be determined according to the width size and stroke of the sliding table 9. In order to facilitate the arrangement of the push mechanisms, the intersection of the movement routes of the push mechanisms is arranged at the geometric center position of the lower pressing plate 1. The automatic centering device for the test block is arranged to compensate for the error of the system, so as to realize the accurate positioning of the test block position, and also to adapt to the positioning process of test blocks of different sizes and different shapes.
[0031] The technical scope of the present application is not limited to the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical concept of the present application, and these modifications and changes should all be within the protection scope of the present application.
Claims
1. A test block automatic centering device, characterized by, The push mechanism includes a stepper motor (7), a screw rod (8), and a sliding table (9), the sliding table (9) reciprocates along the length direction of the slide rail fixed on the pressing plate, the screw rod (8) is driven to rotate by the stepper motor (7), the sliding table (9) is movably fixed on the screw rod (8), and the push plate (10) is fixed on the side of the sliding table (9) away from the stepper motor (7).
2. The test block self-centering device of claim 1, wherein, An active sleeve (11) is fixed on the side of the sliding table (9) facing the screw rod (8), a thread matched with the outer edge of the screw rod (8) is arranged on the inner side of the active sleeve (11), a stroke groove (12) is arranged in the active sleeve (11) along the axial direction of the active sleeve (11), and the length of the stroke groove (12) is smaller than the length of the sliding table (9).
3. The test block self-centering device of claim 2, wherein, A limiting block (13) is further arranged, the limiting block (13) is fixed on the end of the screw rod (8) facing the sliding table (9) and can contact the inner wall of the stroke groove (12).
4. The test block self-centering device of claim 3, wherein, The push mechanism includes a stepper motor (7), a screw rod (8), and a sliding table (9), the sliding table (9) reciprocates along the length direction of the slide rail fixed on the pressing plate, the screw rod (8) is driven to rotate by the stepper motor (7), the sliding table (9) is movably fixed on the screw rod (8), and the push plate (10) is fixed on the side of the sliding table (9) away from the stepper motor (7).
5. The test block self-centering device of claim 1, wherein, An active sleeve (11) is fixed on the side of the sliding table (9) facing the screw rod (8), a thread matched with the outer edge of the screw rod (8) is arranged on the inner side of the active sleeve (11), a stroke groove (12) is arranged in the active sleeve (11) along the axial direction of the active sleeve (11), and the length of the stroke groove (12) is smaller than the length of the sliding table (9).
6. The test block self-centering device of claim 2, wherein, A limiting block (13) is further arranged, the limiting block (13) is fixed on the end of the screw rod (8) facing the sliding table (9) and can contact the inner wall of the stroke groove (12).
7. The test block self-centering device of claim 6, wherein, The push mechanism includes a stepper motor (7), a screw rod (8), and a sliding table (9), the sliding table (9) reciprocates along the length direction of the slide rail fixed on the pressing plate, the screw rod (8) is driven to rotate by the stepper motor (7), the sliding table (9) is movably fixed on the screw rod (8), and the push plate (10) is fixed on the side of the sliding table (9) away from the stepper motor (7). An active sleeve (11) is fixed on the side of the sliding table (9) facing the screw rod (8), a thread matched with the outer edge of the screw rod (8) is arranged on the inner side of the active sleeve (11), a stroke groove (12) is arranged in the active sleeve (11) along the axial direction of the active sleeve (11), and the length of the stroke groove (12) is smaller than the length of the sliding table (9). A limiting block (13) is further arranged, the limiting block (13) is fixed on the end of the screw rod (8) facing the sliding table (9) and can contact the inner wall of the stroke groove (12).