DE237267C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

~ JVr 237267 CLASS 72 c. GROUP

FRIED. KRUPP ACT-GES. in ESSEN, Ruhr.

for recoil guns,

Patented in the German Empire on June 6, 1909.

The subject matter of the invention is a fluid brake for barrel return guns, which is provided with a device for regulating the return length.
In the drawing, FIG. 1 shows an embodiment of the subject matter of the invention in a vertical longitudinal section; the parts are shown in the position that they assume when the gun barrel is in the firing position and when it is set to the longest return stroke, FIG. 2 shows a section according to 2-2 of FIG. 1, seen from the left, FIG -3 of Fig. 1, also seen from the left, Fig. 4 shows a part of Fig. 1 in the position of the parts that they occupy when setting to the shortest return.

FIG. 5 shows a second embodiment in a representation corresponding to FIG. 1 and FIG. 6 shows a part of FIG. 5 in the position of the parts which they are shortest when adjusted Take return.

The embodiment shown in FIGS. 1 to 4 will first be described.

The liquid brake consists essentially. from the brake cylinder A, the brake piston B, its hollow piston rod B ¹ , a hollow cylinder C arranged in the piston rod and in the brake piston and a throttle valve protruding into the cylinder C

bar D. ■ ■ '■

The brake cylinder A is rigidly connected to the horn E of the gun barrel and the piston rod B ¹ to the end F of the gun slide carrier (not shown).

The cylinder C is in the end of the piston rod connected to the end F by means of a connector c ¹ screwed into it (FIG. 1) !? ¹ and by means of a reinforced head c ² in the piston B rotatably but immovably mounted. The throttle rod D is screwed into the bottom of the brake cylinder A connected to the horn E of the gun barrel and protrudes so far into the cylinder C that it does not leave it even during the longest return for which the brake is set up. The free end of the throttle rod D has the same diameter as the bore c ^{3 of} the cylinder C. In addition, the rod D, as far as it protrudes into the cavities of the brake, has a smaller diameter than the bore c ³ , so that between the rod D and the inner wall of the cylinder C, an annular cavity c ^{4 is} created.

For the transfer of the brake fluid from one side of the brake piston B to the other, short grooves a ^{1 are} provided in the wall of the brake cylinder A. Further, the piston has B perforations δ ^3, as determined by the piston rod side of the brake cylinder after the c for receiving the cylinder head ² bore of the piston result B and the position of the parts of Fig. 1 in the perforations c ⁵ open out in said head c ^{2 of} the cylinder C are provided and lead into the annular space c ⁴ .

On its end protruding from the piston rod B ¹ , the connecting piece c ¹ carries a gear R, with the help of which the cylinder C counteracts

can be rotated over the piston B and the piston rod B ^1.

The device described so far is used to regulate the 'return length. May it first the mode of operation of this device will be described.

When the gun barrel is in the firing position and the brakes on the longest Reverse is set, take their parts

ίο the position according to Fig. ι a. In this case, the openings δ ^{3 are} exactly opposite the openings c ^5.

When the gun barrel, the brake cylinder A and the throttle rod D return, the brake fluid is transferred from the piston rod side of the brake cylinder on the one hand through the grooves a ¹ and on the other hand through the openings b ^s , c ⁵ and the annular space c ⁴ to the other side of the brake cylinder (the KoI -beneath) pressed.

When the ends of the grooves a ¹ on the piston rod side of the brake cylinder at the beginning of the return movement have reached the piston B , the liquid only passes through the openings b ^s , c ⁵ and the annular space c ⁴ . This annular space is reduced in the further course of the return due to the shape shown in the drawing, the throttle rod D by little and eventually completed by the free cylindrical end of the rod D. Since it is then no longer possible for the brake fluid to cross over, the returning parts come to a standstill. However, due to the dimensions of the rod D, this only happens after the piston B has completed its full stroke.

If the return is to be very short, the cylinder C is rotated with the aid of the gear R relative to the piston B so far that the full part of the head c ^{2 of} the cylinder C occurs in front of the inner ends of the openings b ³ . The openings c ⁵ are then closed off towards the piston rod side of the brake cylinder, and only the (short) grooves a ¹ are available for the passage of the liquid from one side of the piston to the other (FIG. 4). If their ends, which are on the piston rod side of the brake cylinder at the beginning of the return movement, have reached the piston during return, so that the liquid can no longer pass over, the moving parts come to a standstill.

Between the two limit positions just discussed of the cylinder C with respect to the piston B, there are other positions which result in returns which are between the shortest and the longest. In these positions of the cylinder C, the throttling of the ^{liquid flowing over through the openings δ 3} , c ⁵ takes place mainly at the points at which the mentioned openings open into one another.

In order to achieve a gentle advance with every return length, the following arrangement is used intended.

Between the inner wall of the piston rod B ¹ and the cylinder C and the connector c ^{1 there} is an annular cavity δ ² which extends as far as the head c ^{2 of} the cylinder C. The cavity δ ² is connected to the piston rod side of the brake cylinder diirch openings δ ⁴ which are provided in the piston rod B ¹ . Furthermore, the nozzle c ^{1 is provided} with channels c ⁷ , which establish the connection between the space δ ² and the cavity c ^{3 of} the cylinder C. To close the channels c ⁷ serves a check valve G (Fig. 1), for which the Nozzle c ^{1 forms} the seat, and which is guided on ribs c ^{& of} the cylinder C. In the inner wall of the cylinder C grooves c ⁶ (Fig. Ι and 3) are cut, which ^{allow the brake fluid to exit from the cavity c 3 of} the cylinder C when the gun barrel is advanced. The flow cross section of the grooves c ⁶ is kept very small compared to the flow cross section of the grooves a ¹ , the openings b ^s , c ⁵ and the annular space c ^4.

As a result of the arrangement just described, the brake fluid , by lifting the valve G from its seat, can flow back out of the fluid space of the brake cylinder A on the piston rod side through the openings δ ⁴ , the annular cavity δ ² and the channels c ¹ to the cavity c ^{3 of} the cylinder C overflow.

When the gun barrel is advanced, the valve G closes due to the overpressure occurring in the cavity c ^{3 of} the cylinder C , and the fluid is pressed by the throttle rod D out of the cavity c ³ through the grooves c ⁶ into the fluid spaces of the brake cylinder.

If the device just described for braking the advance with the in the first Line explained device for regulating the return length is connected, as the drawing shows, the effect of the return length control device thereby becomes somewhat influenced. However, there is no significant change in the effect.

The embodiment of the subject matter of the invention shown in FIGS. 5 and 6 differs from the one just described only in that the cylinder C is not rotatably connected to the piston B and the piston rod B ¹ , but is slidable in its longitudinal direction. To the longitudinal displacement of the cylinder C

to allow from the outside, the protruding from the piston rod B ¹ end of the connecting piece c ^{1 is} connected to a two-armed lever H hinged to the end F of the slide carrier.

When the cylinder C of this brake assumes the position relative to the piston B shown in FIG. 5, ie when the openings c ^{5 of} the cylinder C are exactly opposite the openings δ ^{3 of} the piston, the brake is set to the longest return. The shortest return is obtained when the cylinder C in the direction of the arrow χ (Fig. 5) has been moved so far that the openings c ⁶ are completely covered by the piston B (Fig. 6), since then the liquid is returned can only flow over through the grooves a ^{x of} the brake cylinder A.

Claims (2)

Patent Claims: ι. With a device for regulating the return length liquid brake for pipe return protection, characterized in that for the transfer of the brake fluid from one side of the piston (B) to the other side of the brake cylinder (A) grooves (a ¹ ), the length of which corresponds to the shortest return On the other hand, the piston has openings (b ^z ) , the cross-section of which is adjustable from the outside, so that when the piston openings are completely closed, the brake fluid only flows through the brake cylinder grooves and the brake can return as quickly as possible, while the brake fluid flows when the piston openings are more or less open also through this crossover and returns result that are longer than the shortest. 2. Fluid brake according to claim 1, characterized in that a cylinder (C) arranged in the hollow piston rod (B ¹ ) is used to adjust the cross section of the piston openings (b ^s ) , the cavity (c ^s ) of which with the piston rod side of the brake cylinder (A ) is connected by channels that can be closed during the flow by a check valve (G) , and that a throttle rod (D) protrudes into the cavity of the cylinder serving to adjust the cross-section of the piston openings, which in a known manner during the flow the outlet of the Brake fluid from this cavity regulates. 1 sheet of drawings.