CN207231776U - Variable force application apparatus - Google Patents

Abstract

The utility model provides a variable force applying device which can easily change the applied mass force. The variable force applying device of the present utility model has a mass block (6) for applying mass force to the object to be applied force and a mass block containing housing for accommodating the mass block, and a weight block (6) is arranged on the mass block ( 33), a weighting block driving mechanism is installed on the mass block containing housing, and the weighting block driving mechanism drives the weighting block (33) to move between the first position and the second position, and in the first position , the weight block (33) is placed on the mass block (6) to add weight to the mass block (6), and the weight block (33) leaves the mass block (6) at the second position , remove the added weight to the mass block (6).

Description

variable force device

technical field

The utility model relates to a variable force applying device which applies a predictable mass force to a force-applied object such as a spring and can change the applied mass force.

Background technique

There is a force applying device. For example, in order to measure the workpiece, a mass block with a predicted quality is pressed on the workpiece (the object to be applied) to apply a certain mass force to the object to be measured, simulate the working conditions, and then measure its correlation. Size, so as to realize the measurement (detection) of the workpiece. For the simulation of different working conditions, different mass forces need to be applied. However, the mass block is usually installed in the mechanism in a specific way, and it is difficult to replace it, that is, there is a problem that it is difficult to change the mass force.

Utility model content

In view of this, an object of the present invention is to provide a variable force applying device that can easily change the applied mass force.

In order to achieve the above object, the utility model adopts the following technical solutions. In the following descriptions of these technical solutions, the reference numerals attached to the corresponding technical features indicate the structure corresponding to the technical feature in the specific implementation, and have no equivalent meaning to the technical feature, and do not constitute a reference to the technical solution. limitation of the scope.

Technical solution 1: A variable force applying device, which has a mass block (6) for applying mass force to the object to be applied, and a mass block containing housing for accommodating the mass block, and a weight is arranged on the mass block a block (33), a weighted block drive mechanism is installed on the mass block housing, and the weighted block drive mechanism drives the weighted block (33) to move between the first position and the second position; 1 position, the weighting block (33) is placed on the mass block (6) to add weight to the mass block (6), and in the second position, the weighting block (33) leaves the mass block ( 6), removing the weight added to the mass block (6).

By adopting the utility model, the weight block can be superimposed on the mass block, so that the size of the mass force can be adjusted. Moreover, the weighted block is driven by the weighted block drive mechanism to move between the first position and the second position, so that it is possible to easily switch between the weighted state in which the weight is added to the weight and the weighted release state in which the weight of the weighted block is released, and the mass force can be easily adjusted. .

Technical solution 2: According to the variable force applying device described in technical solution 1, the weight driving mechanism includes a driving source and a lifting plate (32), and the driving source drives the lifting plate (32) to move up and down, The weighting block is lifted and lowered by the lifting plate (32) so that the weighting block moves between the first position and the second position.

With such a structure, the lifting plate can lift and lower the weight block with a simple and stable structure, switch between the weighted state and the weighted release state, and easily adjust the mass force.

Technical solution 3: According to the variable force applying device described in technical solution 2, the weight block has a flange portion (33b), and the lifting plate (32) lifts and closes the flange portion (33b). lay down.

According to such a structure, since the flange part for contacting with a lifting plate is provided, mass force can be adjusted easily and reliably.

Technical solution 4: According to the variable force applying device described in technical solution 2, the mass containing housing has an upper end cover (10), and a linear bearing (34) is fixed on the upper end cover (10). A linear optical axis (35) is fixed on the lifting plate (32), and the linear optical axis (35) is matched with the linear bearing (34), so that the upper end cover (10) supports The movement of lifting plate (32) is guided.

With such a structure, guiding the movement of the lifting plate can ensure reliable movement of the lifting plate. Moreover, the use of the linear bearing and the linear optical axis can guide the movement of the lifting plate with high precision with a simple structure and low cost.

Technical solution 5: According to the variable force application mechanism described in technical solution 2, pin holes (33c) are provided on the weight block (33), and corresponding pin holes are provided on the side of the mass block (6) (11a), guide pins for guiding the movement of the weight (33) are inserted into the pin holes (11a) on both sides.

In this way, the weighted block is guided by the guide pin with a simple structure and low cost, and the weighted block is prevented from being skewed.

Technical solution 6: The variable force applying device according to claim 1, which has a displacement sensor (16) for detecting the displacement of the mass block, the weight block (33) has a through hole, and the displacement sensor is connected to the The masses are connected via the through hole.

With such a structure, the displacement sensor detects the displacement of the mass block, and then detects the deformation of the force-applied object, thereby realizing the detection of the force-applied object. In addition, through holes are provided on the weight block, which can easily connect the displacement sensor with the mass block.

Technical solution 7: The variable force applying device according to any one of technical solutions 1 to 6, which has a plurality of weight blocks stacked in sequence in the up and down direction, and multiple sets of weight blocks are provided for the plurality of weight blocks. Weighted drive mechanism.

Since there are multiple weight blocks, the adjustment range of the mass force can be increased. In addition, multiple weighting blocks are stacked in sequence, thereby suppressing the skewing of the mass block, ensuring that only mass force and predictable mass force are applied, and force application accuracy is ensured.

Description of drawings

FIG. 1 is a perspective view from the upper right of a force measuring mechanism (an example of a variable force applying device) related to the first embodiment;

Fig. 2 is a side view of the force measuring mechanism;

Fig. 3 is a cross-sectional view of the front view angle of the force measuring mechanism;

Fig. 4 is a partial cross-sectional view of the side view angle of the force measuring mechanism;

Fig. 5 is a side view of the variable force applying device in the second embodiment;

Fig. 6 is a perspective view of a variable biasing device in a second embodiment.

Explanation of reference signs

100. Variable force application device; 5. Lower plate; 6. Mass block; 6a. Sensor connection part; 8. Cover; 9. Intermediate sleeve; 10. Upper end cover; 11. The third weight block; Mounting plate; 13, back plate; 14, shield mounting block; 15, upper plate; 16, sensor; 31, cylinder; 32, jacking plate; 33, second weight block; 34, linear bearing; 35, linear light axis.

Detailed ways

Specific embodiments of the present utility model are described below with reference to the accompanying drawings.

[First Embodiment]

FIG. 1 is a perspective view seen from the upper right of an urging force measurement mechanism 100 (an example of a variable urging device) according to the first embodiment. FIG. 2 is a side view of the force measuring mechanism 100 . FIG. 3 is a cross-sectional view of the force measuring mechanism 100 viewed from the front. FIG. 4 is a partial cross-sectional view of the force measuring mechanism 100 viewed from the side.

As shown in Figures 1 to 4, the variable force applying device 100 has an upper plate 15 and a lower plate 5 arranged oppositely, a back plate 13 is connected between the rear of the upper plate 15 and the lower plate 5, and the upper plate 15 A pair of left and right pillars 20 are arranged between the front part of the lower plate 5, and a pair of shield mounting blocks 14 are respectively arranged on the left and right sides of the back plate 13 along the up and down direction, and the shield is installed through the shield mounting blocks 14. (not shown in the figure), the protective cover is roughly in the shape of a letter U when viewed from above, and covers the front side and the left and right sides. The upper plate 15 , the lower plate 5 , the back plate 13 , the pillar 20 , and the shield constitute the mechanism framework of the variable force applying device 100 .

As shown in Figure 3, a central mounting hole is provided on the lower plate 5, and a cover 8 is fixedly installed in the central mounting hole. , and the lower end portion is formed as a flange-shaped portion with a larger diameter, and the upper end surface of the flange-shaped portion abuts against the lower surface of the lower plate 5 .

An upper end cover 10 is installed on the upper end of the shroud 8, and an intermediate spacer 9 is fixed in the center hole of the shroud 8, and the axial direction of the middle spacer 9 is consistent with the vertical direction (up and down). In the central hole 9a of the middle spacer 9, a mass block 6 is arranged, and the radial dimension of the mass block 6 is slightly smaller than the center hole of the middle spacer 9, and there is a gap between its outer peripheral surface and the inner peripheral surface of the center hole of the middle spacer 9. The small gap enables the mass block 6 to move up and down along the axial direction of the center hole 9a (mass block receiving hole) of the middle spacer sleeve 9 . The gap between the outer peripheral surface of the mass block 6 and the inner peripheral surface of the center hole of the middle spacer sleeve 9 can be set freely according to the situation. The position offset will have adverse effects on the measurement results; if the setting is too small, the mass block 6 will easily receive resistance from the inner peripheral surface of the central hole when it moves up and down, which will affect the measurement results.

The upper end of the mass block 6 has a small-diameter sensor connection portion 6a, and the sensor connection portion 6a protrudes to the top of the upper end cover 10 through the through hole 10a on the upper end cover 10, and is connected to the probe of the displacement sensor 16 (also referred to as a sensor) (not shown). specific illustration) connection. Displacement sensor 16 (main body portion) is mounted on back plate 13 via sensor mounting plate 12 . When the mass block 6 moves up and down axially along the central hole of the intermediate spacer 9 , the displacement sensor 16 can detect the displacement of the mass block 6 .

A weight block 11 is sheathed on the sensor connection portion 6 a of the mass block 6 , and the weight block 11 is detachably fixed on the mass block 6 .

In addition, an indenter is installed on the lower end surface of the mass block 6 by a screw, and the indenter is used to contact the measured object (such as a spring) to transmit the mass force (gravity) of the mass block 6 to the measured object. The measured object is deformed, and the displacement sensor 16 detects the degree of deformation of the measured object through the movement of the mass block 6 .

Shroud 8, upper end cover 10, middle spacer 9, mass block 6, pressure head 2 etc. constitute the force applying mechanism body part in the utility model, and shroud 8, middle spacer 9, upper end cover 10 constitute mass block to accommodate The shell and the intermediate spacer 9 form a mass holding body, and the central hole 9a of the intermediate spacer 9 forms a mass accommodating hole for accommodating the mass 6 .

In addition, on the outer peripheral surface of the lower end portion of the shroud 8, a vent hole composed of radial through holes is provided, and an air inlet joint is installed on the air vent hole, and the air inlet joint is connected with the air supply mechanism.

An airway is provided on the middle spacer 9, the inlet of the airway is opened on the outer peripheral surface of the middle spacer 9, and communicates with the air hole on the cover 8, and the outlet of the airway is opened on the inner peripheral surface of the middle spacer 9 , and it is set at a position facing the outer peripheral surface of the proof mass 6 . Thus, gas can be blown in between the inner peripheral surface of the air channel centering spacer 9 and the outer peripheral surface of the mass block 6 by the gas supply mechanism, and the mass block 6 is prevented (suppressed) from being held by the mass block 6 by the gas. The middle spacer 9 hangs or sticks, etc. and affects the accuracy of the applied force to the spring 19, that is, the mass block 6 is only subjected to the action of gravity, and reaches the effect that the constant predictable mass force is pressed onto the spring (the object to be applied) , so as to ensure the measurement accuracy.

In this embodiment, there is a radial gap between the sensor connecting portion 6a and the through hole 10a of the upper end cover 10 (there is also a radial gap between the weight block 11 and the through hole 10a after the weight block 11 is installed), and the spacer sleeve 9 and The gas between the mass blocks 6 can be discharged from the upper side of the mass blocks 6 through the through hole 10 a of the upper end cover 10 . In addition, in this embodiment, preferably, a plurality of airway outlets are uniformly arranged along the circumferential direction of the inner peripheral surface of the intermediate spacer 9 .

As shown in Figures 1 to 4, a pair of cylinders 31 are fixed on the left and right outer walls of the shroud 8, the upper end of the cylinders 31 is fixed with a lifting plate 32, and the lifting plate 32 is located above the upper end cover 10, and the cylinders 31 can Drive the lifting plate 32 to move up and down. In addition, as shown in FIG. 3 and FIG. 4 , a weight block 33 is also provided on the weight block 11, and the weight block 33 has a shaft-shaped portion 33a and a flange portion 33b extending radially outward from the upper end of the shaft-shaped portion 33a. , the shaft-shaped portion 33a is inserted into the through hole 32b on the lifting plate 32, can contact the weight block 11 through the through hole 32b, and is supported by the mass block 6 through the weight block 11, that is, its mass force can pass through the weight block 11 is delivered to mass block 6.

In addition, as shown in FIG. 3 and FIG. 4 , the weight block 33 has a central through hole 33d, and the sensor 16 and the sensor connection portion 6a of the mass 6 are inserted into the through hole 33d to be connected. That is, the sensor 16 is connected to the sensor connection portion 6a of the mass 6 via the through hole 33d.

The flange portion 33 b of the weight block 33 is located above the lifting plate 32 , and its diameter is larger than the through hole 32 b on the lifting plate 32 . When the lifting plate 32 is driven upward by the cylinder 31, the lifting plate 32 contacts the lower end surface of the flange portion 33b of the weighting block 33, and the weighting block 33 is lifted, so that the weighting block 33 is separated from the weighting block 11 (lifting plate 32 Move to lift weight block 33 and make it leave the position of weight block 11), its gravity can not be applied on weight block 11, mass block 6. When the cylinder 31 drives the lifting plate 32 to return, the weighting block falls, and the lifting plate 32 breaks away (the lifting plate 32 moves to a position where it is separated from the lower end surface of the flange portion 33b of the weighting block 33), and falls on the center mass above, the effect of adding weight to the mass block 6 is achieved.

The cylinder 31 and the lifting plate 32 constitute the driving mechanism of the weighted block in the utility model, and the cylinder 31 constitutes the driving source of the weighted block in the utility model.

As shown in Figure 3, a linear bearing 34 is provided on the upper end cover 10, and a linear optical axis 35 is fitted in the linear bearing 34, and a screw hole 32a is provided on the upper surface of the lifting plate 32, and the screw hole 32a is screwed into the screw hole 32a. The linear optical axis 35 is fixed on the jacking plate 32 by screws. In this way, the movement of the lifting plate 32 is guided by the cooperation of the linear bearing 34 and the linear optical axis 35 , so that the lifting plate 32 can go straight up and down, avoiding the skew of the weight block 33 .

As shown in Figure 4, a pin hole 33c is provided on the lower end surface of the shaft-shaped portion 33b of the weight block 33, and a corresponding pin hole 11a is provided on the upper end face of the weight block 11, and guide pins are inserted into the pin holes on both sides. Therefore, the movement of the weight block 33 can be guided, and the skew of the weight block 33 can be further avoided.

With the structure of the present embodiment, the lifting plate 32 is driven to move up and down by the cylinder 31, and the weight block 33 can be lifted or put down, that is, the weight block is placed on the mass block 6 (with the weight block 11) facing the mass block 6. The weighted position (the first position) and the position (the second position) that leaves the mass block 6 (leaves the weight block 11) to release the weight of the mass block 6 moves between, so that the mass force applied to the object to be exerted can be changed. size.

In addition, the cylinder 31 is mounted on the shroud 8 which is a part of the mass containing case, so that the structure is compact.

In this embodiment, the mass force of the weight block 33 is transmitted to the mass block 6 through the weight block 11 , however, it can also be changed to a structure in which the weight block 11 is omitted, and the weight block 33 directly exerts force on the mass block 11 .

In addition, although the air cylinder 31 is used as a driving source, other driving sources such as hydraulic cylinders and motors may also be used.

In addition, in this embodiment, as the configuration of the driving mechanism, the method of lifting the weight block from below is adopted. However, the present invention is not limited thereto, and for example, the method of lifting the weight block from above may also be adopted.

[Second Embodiment]

FIG. 5 is a side view of a variable biasing device 200 in the second embodiment, and FIG. 6 is a perspective view thereof.

The main difference between the second embodiment and the first embodiment is that in the first embodiment, there is one mass that can be lifted and lowered by the cylinder, while in the second embodiment there are two masses that can be driven by the cylinder. And lift up, put down the mass block.

As shown in Figures 5 and 6, a pair of first air cylinders 231A and a pair of second air cylinders 231B are arranged on the side wall of the mass block housing 208 containing the mass blocks inside. The first air cylinders 231A and the second air cylinders 231B are in The circumferential direction is staggered, or in other words, a pair of first cylinders 231A are arranged oppositely, and a pair of second cylinders 231B are arranged oppositely, and the pair of first cylinders 231A drives the first lifting plate 232A to move up and down, so that it can be lifted, The first weight block 233A is put down, and the second lifting plate 232B is driven to move up and down by a pair of second air cylinders 231B, so that the second weight block 233B can be lifted and lowered. The first lifting plate 232A is located perpendicular to the length direction of the second lifting plate 232B.

The first weight block 233A is located above the second weight block 233B, and the first lifting plate 232A is located above the second lifting plate 232B, that is to say, the mass force of the first weight block 233A is applied through the second weight block 233B .

In addition, reference numeral 217 in the figure represents an air intake joint installed on the mass housing housing 208 .

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

For example, in the above-mentioned embodiment, the force applying mechanism of the present utility model has been described by taking the force applied to the spring (the object to be applied) to detect the force of the spring as an example. However, whether the improvement of the present utility model is applied to There is no necessary relationship in the application of force to the spring, that is, the utility model can also be applied to the application of force to objects other than springs.

In addition, from the point of view of the force application accuracy, the setting of the sensor is not necessary, and the sensor can be separated from the force application mechanism 100 and installed independently, that is, the force application mechanism 100 may not include the function of the sensor (detection function). .

Claims (7)

1. A variable force applying device, which has a mass block (6) for applying mass force to an object to be applied force and a mass block containing housing for accommodating the mass block, characterized in that, A weight block (33) is arranged on the mass block, A weighted block driving mechanism is installed on the mass block containing housing, and the weighted block driving mechanism drives the weighted block (33) to move between the first position and the second position, In the first position, the weight block (33) is placed on the mass block (6) to add weight to the mass block (6), In the second position, the weight block (33) is separated from the mass block (6), and the weight on the mass block (6) is released. 2. The variable force applying device according to claim 1, characterized in that, The driving mechanism of the weighted block includes a driving source and a lifting plate (32), the driving source drives the lifting plate (32) to move up and down, and the lifting plate (32) lifts and lowers the weighting block And the weight block is moved between the first position and the second position. 3. The variable force applying device according to claim 2, characterized in that, The weight block has a flange portion (33b), and the lifting plate (32) lifts and lowers the flange portion (33b). 4. The variable force applying device according to claim 2, characterized in that, The mass containing housing has an upper end cover (10), on which a linear bearing (34) is fixed, A linear optical axis (35) is fixed on the lifting plate (32), and the linear optical axis (35) cooperates with the linear bearing (34), so that the upper end cover (10) The movement of the lifting plate (32) is guided. 5. The variable force applying device according to claim 2, characterized in that, A pin hole (33c) is provided on the weight block (33), a corresponding pin hole (11a) is provided on the side of the mass block (6), and a pair of all A guide pin for guiding the movement of the weight block (33). 6. The variable force applying device according to claim 1, characterized in that, having a displacement sensor (16) detecting the displacement of said mass, The weight block (33) has a through hole, and the displacement sensor is connected with the quality block through the through hole. 7. The variable force applying device according to any one of claims 1 to 6, characterized in that it has a plurality of weight blocks stacked one after the other in the up and down direction, and a set of weight blocks is provided for the plurality of weight blocks. Multiple sets of weighted block drive mechanism.