DE1801760A1 - Lockable adjusting device - Google Patents

Description

'\ V ^: GT-. «Exrc ^ h GmbH

Lockable ο adjusting device

The invention relates to a lockable adjustment device, in particular for hydraulic devices such as pressure, directional and flow valves, as well as variable displacement pumps. In a known manner, a lockable adjusting device consists of an adjusting spindle with a Operating handle, whereby to transmit the torque from the operating handle for the adjusting spindle the lock arranged in the axial extension of the ^ adjusting spindle is used. In the locked state of the lock, the locking bolt of the lock is retracted into the lock body, so that the operating handle in the The lock can be rotated around the fixed adjusting spindle. the known lockable adjusting devices have an extremely complex construction and require "a cumbersome Assembly. This is mainly due to the fact that, in particular, when the adjusting spindle adjusts itself in the axial direction the lock housing is fixed on the adjusting spindle in the axial direction and at the same time a fastening element for the operating handle for the transmission of the torque and the dismantling must be secured to the extent that unauthorized personnel can dismantle for the purpose of an unauthorized adjustment of the adjusting spindle is not recognizable.

The aim of the invention is to provide a lockable adjusting device j

to create that composed of a small number of components and at the same time ensures quick and easy assembly. According to the invention this is achieved by the combination of the following features, some of which are known per se:

009824 / 05Q6 ORIGINAL

The sleeve-shaped operation handle includes a sichel-- 'shaped extending projection which with an encircling ¹ "groove ■ ^-" of the adjusting spindle in form-locking is - d.er to the lock body, a constructional unit-forming flange is positively connected to the operating handle and a stop for axial support of the lock body is arranged on the operating handle.

Due to the positive connection of the operating handle with the Adjusting spindle, as well as the stop on the actuating handle for axi- ■ * alen support of the lock body, a functional separation is achieved between the operating handle and lock body, such that the Lock body exclusively as an element for transmitting the torque from the operating handle to the adjusting spindle and the operating handle takes over the axial securing of the lock body on the adjusting spindle. In a further development of the invention is the operating handle is provided with internal teeth, which are marked with an external toothing of the flange, which forms a structural unit with the lock body, is in positive engagement Connection between the operating handle and the flange of the lock body results in a simple assembly and the advantage of that 'the zero setting attached to the operating handle The scale according to the tooth pitch is to be brought exactly in line with the zero position of the adjusting spindle and two / already during assembly, so that the scale can be imprinted directly at the relevant point on the operating handle.

Profile of the crescent-shaped projection of the operating handle, : .as well as the profile of the operatively connected to the projection ;: ut in the adjusting spindle advantageously have a trapezoidal

009824/0506 BAD original

shaped course. In addition to a larger contact surface, a trapezoidal one has Profile of hat and ledge the further advantage of daiV

the risk of injury both during assembly and operation 4 adjustment device without operating handle is reduced.

In a further development of the invention, the axial support of the flange of the lock body forms the known cover disk of the Operating handle, so that a special stop is unnecessary.

An embodiment of the invention is shown in the drawing.

Fig. 1 shows an axial section of a pressure relief valve with lockable adjustment device.

FIG. 2 shows a section "along the line II-II in FIG. 1.

In Fig. 1, 1 denotes the adjusting spindle, 2 denotes the operating handle and 3 denotes the lock. At the upper end H of the adjusting spindle 1, the lock 3 is rotatably guided in a bore 5. At the level of the locking bolt 6, a transverse bore 7 is provided, into which the locking bolt 6 engages when the lock 3 is unlocked by means of a key S.

The flange 8, which forms a component with the lock 3, has on its The scope of an external toothing 9, which is connected to the internal toothing Io of the operating handle 2 is engaged. In the area of trapezoidal The crescent-shaped projection 12, which is adapted to the profile of the groove 11, engages the circumferential groove 11 of the adjusting spindle 1 (Fig. 2). The clear width of the operating handle 2 in the area

. /Outside-

of the sickle-shaped projection 12 corresponds to the diameter of Adjusting spindle 1.

- k - 009824/0 50 8 ^{BAD OR: QINAL}

A cover disk 14 is attached to the upper end 13 of the actuation handle 2 and at the same time serves to axially support the flange 8 which forms a unit with the lock 3. The compression spring 15 in the bore 16 of the adjusting spindle 1 compensates for the axial play of the parts that are in direct contact with one another. On the outer circumference of the lower end 17 of the operating handle 2, a scale division, not shown in detail, is attached for reading the position of the adjusting spindle. The lower end of the actuating handle 2 encloses in each axial position a _{sleeve 19 which surrounds the adjusting spindle 1} and is fastened to the upper housing part 18 of the hydraulic device. B., can be adjusted in an unauthorized manner by means of a pipe wrench.

The spindle 1 has an external thread. 2o which is in positive engagement with an internal thread 21 of the upper housing part 18 and, when actuated by means of the actuating handle 2, the spring 23, which loads the valve body 22 guided in the valve housing 24 in the closing direction, is arranged in the blind bore 26 of the spindle 1 more or less preloaded depending on the direction of rotation and thus determines the opening pressure. The arrows 25 show the flow through the valve housing.

The installation of the adjusting device is carried out in such a way that initially the actuating handle 2 is placed on the adjusting spindle 1 in such a way that the sickle-shaped projection 12 of the actuating handle is positively engaged in the circumferential groove 11 of the adjusting spindle 1 is present. Then the lock body 3 is used with a flange. It is important to ensure that the adjusting spindle takes its zero position, the scale division de? Actuation

_ ς _ 0 0 9 * Ή / 0 5 0 6 BAD ORIGINAL

- The handle is also at zero and the locking bolt β is inserted of the lock body 3 engages in this position of the adjusting spindle and actuating handle in the transverse bore 7 of the adjusting spindle. After the lock body has been inserted, the cover plate 14 is put on and fastened to the operating handle 2. When completing i the adjusting device pulls the locking bolt 6 back from the transverse bore so that the operating handle 2 with the lock body 3 went crazy.

The adjusting spindle 1 is generally an integral part of the hydraulic device. In the illustrated pressure valve, the adjusting spindle 1 is a pick-up member for the compression spring 23 for setting the opening pressure. In the case of flow control valves, the adjusting spindle adjusts the flow cross-section of the throttle element. Here ^: the cross-section is adjusted exclusively by rotating the adjusting spindle. In this case, the adjusting spindle is axially fixed on the housing.

BAD OWG (NAL

00982A / 0506

Claims (4)

Claims ι ο η ι τ Γ η - loU I / DU 1.) Lockable adjustment device for hydraulic devices such as pressure, Directional und.Stromventile, as well as variable displacement pumps, wherein the lock is arranged in an axial extension of the adjusting spindle and serves as a transmission element of the torque from the operating handle to the adjusting spindle and in the locked state of it The locking bolt is withdrawn into the lock housing in such a way that the operating handle is together with the lock body freely rotated when the adjusting spindle is at a standstill,. <**> ' characterized by the combination of the following features, some of which are known per se: a) the sleeve-shaped actuating handle (2) has a crescent-shaped projection on its inner circumference (12), which is in positive engagement with a circumferential groove (11) in the adjusting spindle (1), b) the flange forming a structural unit with the lock body (3) (8) is positively connected to the operating handle (2) and c) a stop (14) for axially supporting the lock body (3) is arranged on the operating handle (2). 2.) Lockable adjusting device according to claim 1, characterized characterized in that the operating handle (2) is provided with an internal toothing (lo) with a External toothing (9) of the flange (8) which forms a structural unit with the lock body (3) is in positive engagement. 009 8 2 4/0506 3 ·) Lockable adjusting device according to claims 1 or characterized in that the profile of the sickle-shaped projection (12) as well as the groove (11) connected to this projection in the adjusting spindle (1) are trapezoidal. 4.) Lockable adjusting device according to claims 1 to 3 or one of the same, characterized in that on the adjusting spindle (1) facing away from the end face of the actuating handle (2) a cover plate (14) which supports the splash (B) and which is known per se is attached. 009824/0506 Blank page