CN101865767A - A self-balancing symmetrical loading device - Google Patents

Abstract

The invention discloses a self-balancing symmetrical loading device, in which a sliding-fit loading slider bracket is arranged in a chute of the chute bracket, a sliding-fit loading slider is arranged in the loading slider bracket, and the notch end of the chute bracket Set the bracket return spring stopper, the loading stud passes through the loading slider bracket and the bracket return spring stopper to push against the loading slider; the loading slider bracket and the loading slider are respectively provided with corresponding arc grooves, and the arc concave Slider return springs are respectively provided on both sides of the groove; support return spring I is provided between the loading slider support and the inner wall of the chute support, and support return spring II is provided between the loading slide block and the support return spring stopper. The present invention can achieve zero bending moment self-balancing symmetrical loading effect by driving the loading stud, and can also reversely drive the loading stud to achieve self-balancing zero bending moment uniform unloading of the loading device, because zero bending can be realized when the torque of the shaft is detected Torque loading or unloading, the torque test data of the detection shaft is more accurate and real.

Description

A self-balancing symmetrical loading device

technical field

The invention relates to a loading device for shafts, in particular to a self-balancing symmetrical loading device.

Background technique

In order to ensure the stable and reliable operation of various power systems after installation, each subsystem in the load spectrum test must calibrate the torque of the power output shaft, and the torque test data is the most important test data in the load spectrum test, and its accuracy needs to be guaranteed.

In the prior art, the commonly used mechanical torque loading devices basically apply bending moment to the shaft while applying torque to the shaft. In studies of loading on shafts, shafts are generally subjected to torque and bending moments. When detecting the torque of the shaft, it is bound to be affected by the bending moment, thus affecting the detection accuracy. Therefore, the single torque loading and bending moment loading have great significance for the research of the shaft.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides a self-balancing symmetrical loading device that can realize zero bending moment when torque is applied to the shaft, and detect the torque test data of the shaft more accurately.

The invention provides a self-balancing symmetrical loading device, which comprises a chute bracket, a loading slider bracket, a loading slider, a bracket reset spring stopper and a loading stud; the loading slider bracket is arranged in the chute of the chute bracket and slidingly fit with it; the loading slider is arranged in the loading slider bracket and slidingly fits with it; the bracket return spring stopper is fixedly arranged on the notch end of the chute bracket, and one end of the loading slider bracket extends Out of the support return spring stopper and clearance fit with it; the loading stud passes through the loading slide bracket and the support return spring stopper and pushes against the loading slide, the loading stud and the loading slide support support clearance fit, and the support return spring The stopper thread fits; the sliding direction of the loading slider bracket in the chute bracket, the sliding direction of the loading slider in the loading slider bracket and the axis of the loading stud are in the same direction; the loading slider bracket Corresponding arc-shaped grooves are respectively set on the inner side of the other end and the corresponding loading slider; Slider return spring: a support return spring I is set between the other end of the loading slider support and the corresponding inner wall of the chute support, and a support return spring II is provided between the loading slider and the support return spring block.

Further, it also includes a loading disc arranged in the two arc-shaped grooves, the loading disc is provided with a mounting hole matched with the shaft to be measured along the axis, and the outer circular surface of the loading disc corresponds to the arc-shaped groove.

Further, a friction plate is included, the friction plate is sleeved on the outer circle of the loading disk, and the outer circle of the friction plate corresponds to the arc-shaped groove.

Further, the outer end of the loading stud is fixedly connected with a handle that drives the loading stud to rotate.

Further, the support return spring II is sleeved on the loading stud.

The beneficial effects of the present invention: drive the loading stud, push the loading slider to move to the left, and at the same time, the loading slider bracket installed in the chute support chute slides to the right under the reaction force of the thread, so that the loading slider and Loading the slider bracket can clamp the shaft from the left and right sides at the same time to achieve the effect of zero bending moment symmetrical and uniform loading; reversely drive the loading stud, push the loading slider to move to the right, and the compressed slider return spring drives the loading When the slider and the loading slider bracket slide in opposite directions, the bracket return spring Ⅰ and the bracket return spring Ⅱ will be compressed, so that the loading slider and the loading slider bracket are respectively subjected to an elastic force, which is the same as that of the slider return spring. The elastic forces cancel each other out, so that the loading slider and the loading slider bracket return to their original positions, and the loading device is self-balanced and evenly unloaded with zero bending moment. Since zero bending moment loading or unloading can be realized when detecting the torque of the shaft, the torque test data of the detection shaft is more accurate and real.

Description of drawings

Fig. 1 is a sectional view of a self-balancing symmetrical loading device of the present invention;

Fig. 2 is a sectional view along A-A direction in Fig. 1 .

In the accompanying drawings, 1—chute bracket 2—loading slider bracket 3—slider return spring 4—friction plate 5—loading disc 6—bracket return spring Ⅰ 7—key 8—shaft 9—loading slider 10—bracket reset Spring Ⅱ 11—Inner hexagon screw 12—Bracket return spring stopper 13—Loading stud 14—Washer 15—Lock nut 16—Pin 17—Nesting 18—Handle 19—Washer 20—Fixing nut.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail. the

Fig. 1 is a sectional view of a self-balancing symmetrical loading device of the present invention, and Fig. 2 is a sectional view along the direction A-A in Fig. 1, as shown in the figure. A self-balancing symmetrical loading device includes a chute bracket 1 , a loading slider bracket 2 , a loading slider 9 , a bracket return spring stopper 12 , a loading stud 13 , a loading disk 5 , a friction plate 4 and a handle 18 .

The chute bracket 1 is a U-shaped structure, and the chute opening of the loading slider bracket 2 of the U-shaped structure faces to the right, and the loading slider bracket 2 is arranged in the chute of the chute bracket 1 and slides with the chute of the chute bracket 1 Cooperate. The loading slider bracket 2 is a frame structure, and the loading slider 9 is arranged in the frame of the loading slider bracket 2 and is slidably matched with the frame. Support return spring stopper 12 is installed on the right end of chute support 1 by hexagon socket head cap screw 11, and the right end of loading slider support 2 stretches out support return spring stopper 12 and cooperates with support return spring stopper 12 gaps. The loading stud 13 passes through the right end of the loading slider bracket 2 and the bracket reset spring stopper 12 from right to left horizontally and pushes against the loading slider 9, and the loading stud 13 is clearance-fitted with the right end of the loading slider bracket 2, and the bracket The middle part of the return spring stopper 12 is provided with a threaded hole, and the loading stud 13 is threadedly matched with the support return spring stopper 12 . The sliding direction of the loading slider bracket 2 in the chute bracket 1 , the sliding direction of the loading slider 9 in the loading slider bracket 2 and the axis of the loading stud 13 are in the same horizontal direction. The inner side of the left end of the loading slider bracket 2 and the left side of the loading slider 9 are respectively provided with corresponding arc-shaped grooves, and the left and right two arc-shaped grooves have an elliptical structure. Between the inner side of the left end of the loading slider bracket 2 and the loading slider 9, and on the upper and lower sides of the arc-shaped groove, a slider return spring 3 is respectively arranged, and one end of the slider return spring 3 is pressed against the side of the loading slider bracket 2. The inner side of the left end, the other end is pressed on the loading slide block 9. A support return spring I6 is arranged between the left end of the loading slider support 2 and the inner wall on the left side of the chute support 1 . A support return spring II10 is arranged between the loading slider 9 and the support return spring stopper 12, and the support return spring II10 is sleeved on the loading stud 13.

The loading disc 5 is set in two arc-shaped grooves, and the loading disc 5 is provided with a mounting hole along the axis to cooperate with the shaft 8 to be tested, and the shaft 8 to be tested is installed in the mounting hole of the loading disc 5 through the key 7 Inside. The friction plate 4 is sleeved on the outer circle of the loading disk 5, and the outer circle of the friction plate 4 corresponds to the arc groove. When loading, when the loading slider bracket 2 on the left and the loading slider 9 on the right clamp the shaft 8 from the left and right simultaneously, they first contact the friction plate 4, which can not only achieve uniform loading on the shaft 8, but also can Play the role of protecting the axis 8.

The handle 18 is a handwheel structure, and the outer end of the loading stud 13 is installed in the nesting 17 of the handle 18 and fixed by a pin 16 . A washer 14 and a locking nut 15 are sleeved on the loading stud 13 between the right end of the loading sliding bracket 2 and the handle 18 .

When using this kind of self-balancing symmetrical loading device, first install the shaft 8 with detection in the mounting hole of the loading disc 5 through the key 7, and the end of the shaft 8 is fitted with a washer 19, and locked by a fixing nut 20 tight.

When the device is loaded, turn the handle 18 clockwise to move the loading stud 13 to the left, so that the loading slider 9 slides to the left in the groove of the loading slider bracket 2; The threaded hole of the stopper 12 is screwed in to the left, the chute support 1 moves to the right relative to the loading stud 13, the support return spring I6 exerts a spring force to the right on the loading slider support 2, and the loading slide support 2 is in the position of the support return spring I6 Sliding to the right under the action of the spring force, the slider return spring 3 is compressed. Loading slide block 9 and loading slide block support 2 can clamp loading disc 5 simultaneously from the left and right sides of loading disc 5 that friction disc 4 is installed like this, then use lock nut 15 to load the position of stud 13 Fixing is carried out to prevent the loading stud 13 from sliding to the right, so as to achieve the effect of zero bending moment symmetrical and uniform loading.

When unloading, turn the handle 18 counterclockwise to make the loading stud 13 move to the right. Since the slider return spring 3 is compressed during loading, the loading slider 9 and the loading slider bracket 2 are restored by the slider return spring 3 Under the action of force, the loading slider 9 slides to the right, and the loading slider bracket 2 slides to the left, so that the bracket return spring I6 and the bracket return spring II10 are compressed, so that the loading slider 9 and the loading slider bracket 2 are respectively subjected to a The effect of the elastic force, this force and the elastic force of the slider return spring 3 cancel each other, so that the loading slider 9 and the loading slider bracket 2 return to their original positions, and finally realize the self-balancing zero bending moment uniform unloading of the loading device. Self-balancing is mainly realized by four springs.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (5)

1. a self-equilibrating symmetry charger is characterized in that: comprise chute support (1), loading slider bracket (2), load slide block (9), support back-moving spring block (12) and load double-screw bolt (13); Described loading slider bracket (2) is arranged in the chute of chute support (1) and with it and is slidingly matched; Described loading slide block (9) is arranged on to load in the slider bracket (2) and with it and is slidingly matched; Described support back-moving spring block (12) is fixedly installed on the notch end of chute support (1), an end of described loading slider bracket (2) stretch out support back-moving spring block (12) and with its clearance fit; Described loading double-screw bolt (13) passes loading slider bracket (2) and support back-moving spring block (12) withstands on the loading slide block (9), loads double-screw bolt (13) and loads slider bracket (2) clearance fit, with support back-moving spring block (12) threaded engagement; The glide direction of described loading slider bracket (2) in chute support (1), load slide block (9) in loading slider bracket (2) glide direction and the axis of loading double-screw bolt (13) on same direction; The other end of described loading slider bracket (2) inboard with on its corresponding loading slide block (9) corresponding arc groove to be set respectively; The other end of described loading slider bracket (2) inboard with loading slide block (9) between and the both sides that are positioned at arc groove be respectively equipped with slide block back-moving spring (3); Between the other end of described loading slider bracket (2) and corresponding chute support (1) inwall support back-moving spring I (6) is set, loads between slide block (9) and the support back-moving spring block (12) support back-moving spring II (10) is set.

2. a kind of self-equilibrating symmetry charger according to claim 1, it is characterized in that: also comprise the loading disk (5) that is arranged in two arc grooves, described loading disk (5) upper edge axis is provided with the mounting hole that cooperates with axle (8) to be measured, and the periphery that loads disk (5) is corresponding with arc groove.

3. a kind of self-equilibrating symmetry charger according to claim 2, it is characterized in that: also comprise friction disc (4), described friction disc (4) is enclosed within on the cylindrical that loads disk (5), and the cylindrical of friction disc (4) is corresponding with arc groove.

4. according to the described a kind of self-equilibrating symmetry charger of each claim in the claim 1 to 3, it is characterized in that: fixedly connected with the handle (18) that drives loading double-screw bolt (13) rotation in the outer end of described loading double-screw bolt (13).

5. a kind of self-equilibrating symmetry charger according to claim 4, it is characterized in that: described support back-moving spring II (10) is enclosed within and loads on the double-screw bolt (13).

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