57 results about "Piston Guide" patented technology

The application discloses a piston guiding device and relates to the technical field of piston assembly, which comprises a piston and a connecting rod, a piston guide barrel for defining the piston, a guide mechanism arranged on the piston guide barrel for guiding the insertion of the connecting rod, and rotating parts with adjustable spacing arranged oppositely; a guide barrel cover plate in clamping cooperation with the piston guide barrel, and a piston assembly rod slidingly inserted into the guide barrel cover plate. In the piston guiding device, the guide barrel cover plate fixes the position of the piston assembly rod, the piston assembly rod is guided and stabilized during the advancement of the piston, the piston is not prone to be stuck, the pressing of the rotating parts on the connecting rod can stabilize the clamping of the connecting rod, the insertion of the connecting rod is more stable, the pressure of the rotating parts on both sides of the connecting rod is equal, the rotating parts always move along the axis of the piston during the insertion of the rotating parts, and the centering effect is achieved.

A piston housing unit (1) is disclosed, comprising: - a piston (3), - a housing (2), wherein the piston (3) is provided to be displaceable in the housing (2) along an axis (X) and is connected to a transmission element (5) of the piston-housing unit (1), wherein the transmission element (5) is supported by a first bearing (6) and a second bearing (7). Furthermore, a piston (3), a housing (2), a transmission element (5) and an actuator (10) are disclosed.

The present application relates to a kind of pipe string manipulator clamp device capable of only grabbing single tubular column, belong to the tubular column automatic technology field of oil and gas drilling equipment.The clamp device is by increasing the main finger driving hydraulic cylinder piston guide mechanism, lateral load is borne by guide mechanism, avoid the radial load that main finger driving hydraulic cylinder piston rod is subjected to, improve the service life of main finger driving hydraulic cylinder and the security of clamp device operation;Increase the pipe blocking mechanism driven by connecting rod assembly in the clamp device, when main finger driving hydraulic cylinder is contracted to the shortest, the maximum size of jaw depth space, can realize the clamp device holding maximum diameter pipe column, when main finger driving hydraulic cylinder is stretched to the longest, the minimum size of jaw depth space, can realize the clamp device holding minimum diameter pipe column, realize the same clamp can hold pipe column of different diameter function, ensure that the clamp cannot simultaneously hold the condition of two pipe columns, realize the purpose of fully automated mechanical hand pipe string operation.

The invention relates to a one-piece air injection device body (2), comprising: a pressure chamber (3), which encloses a piston guide (20) for receiving a piston (22) and a valve seat (15) for the piston (22); an interface (10) for a control unit (30) for controlling the position of the piston (22); and an air outlet (14). It is provided that the air injection device body (2) further comprises at least two further connections (12) for further air injection devices (4). The invention further relates to an air injection device (4) having such an air injection device body (2) and to an air delivery and / or cleaning module (6).

The utility model relates to the technical field of sole pressing machines, and discloses a flowing type self-balancing floating bottom cylinder which comprises an oil cylinder body of a cuboid structure, a plurality of independent oil cavities are formed in the oil cylinder body side by side in the length direction, oil cylinder openings are formed in the tops of the oil cavities, and the bottoms of adjacent oil cylinders are communicated through one or more oil guide channels. The side walls of the foremost oil cavity and the last oil cavity are each provided with an oil injection opening. A piston guide piece is installed on an oil cylinder opening, a piston rod penetrates upwards from the bottom of the piston guide piece, a fixing plate is arranged at the top end of the piston rod, the oil cylinder body is arranged to be of solid structures on the two sides of parallel oil cavities, guide rods are fixed to the bottoms of the two ends of the fixing plate respectively, the guide rods are movably inserted into guide holes formed in the solid structures, and reset springs are arranged on the guide rods in a sleeved mode. An accessory hydraulic control system and an external auxiliary software and hardware system in a traditional scheme are omitted, energy consumption and manufacturing cost are greatly reduced, the size is reduced, installation space is saved, and installation is more convenient.

Disclosed in the invention is an all-plastic pressing pump comprising: an actuator, an insert, a housing, a container cap, a piston guide, a pump ball, a spring, and a protective cover, made of plastic. The lower end of the piston guide is provided with a slidable sealing part that is inserted into the housing and slidably and sealing connected to the inner wall of the housing. The container cap has a central hole for the piston guide to pass through. A conical frustum sealing part is provided on the piston guide above the slidable sealing part, and the conical frustum sealing part forms a sealed connection with the side wall of the central hole when it bounces up. An air replenishment channel is disposed between the housing and the container cap. A liquid outlet channel and a switch structure are disposed between the actuator and the piston guide, and the switch structure opens the liquid outlet channel when the actuator is pressed down and blocks the liquid outlet channel when the actuator bounces up. A guide sleeve is provided on the top of the container cap and is upwardly sleeved on the outer side of the actuator. An anti-off protrusion is provided at the upper end of the guide sleeve. The actuator is provided with an anti-off hook that is capable of being hooked on the anti-off protrusion. The spring is disposed inside the guide sleeve and is pressed between the top of the actuator and the top of the container cap. The spring is a plastic spring tube with open upper and lower ends and a sealed side, and the structure thereof is simple.

The invention provides a V-shaped groove transmission mechanism which comprises a transmission shaft provided with V-shaped grooves, balls and a piston guide rail, one end of the transmission shaft is provided with an external spline connected with a motor spindle, the middle of the transmission shaft is provided with four rows of V-shaped grooves, two rows of V-shaped grooves close to the external spline end form a pair, and the two rows of V-shaped grooves are symmetrically arranged on the two sides of the transmission shaft; two rows far away from the external spline end form a pair, and the two rows are symmetrically arranged on the two sides of the transmission shaft and form included angles with the pair of V-shaped grooves close to the external spline side; and the V-shaped groove is internally provided with the ball and is matched with the piston guide rail. According to the invention, stable transmission control can be realized.

The application relates to a quick mounting method of a pneumatic differential lock of an engineering vehicle chassis transfer case, when disassembled, a positioning bolt is extended into a threaded hole of a pneumatic shift fork plate from a through hole of a bearing seat, the position of the pneumatic shift fork plate is fixed, the pneumatic shift fork rod is rotated counterclockwise, the threads between the pneumatic shift fork rod and the pneumatic shift fork plate are separated, and the pneumatic shift fork rod is disassembled from a piston hole of the bearing seat, so that the easily-damaged piston guide ring, the piston O-shaped ring and the easily-fatigued compression spring are replaced. The pneumatic shift fork plate is fixed through external bolts, the easily-damaged parts of the differential lock can be disassembled without disassembling the whole machine, the operation is simple, the maintenance is quick, and the precision of the whole machine is not affected.

This utility model discloses a rotating lip powder cream device, including an upper cover, a pen body, a knob sleeve, and a replacement component. The knob sleeve includes a knob seat and a lower toothed post. The replacement component includes a middle section, a sponge head, a dispensing head, a cotton head seat, a piston, a guide, an upper toothed post, and a screw. The guide is equipped with a reverse ratchet structure. The guide is equipped with positioning ribs, and the guide and the middle section are fixedly connected by the positioning ribs. This utility model adopts a bidirectional ratchet structure, which is novel and supports bidirectional rotation. Clockwise rotation dispenses the powder, while counterclockwise rotation prevents the powder from flowing back. The replacement component is fixed to the pen body with a snap-fit, allowing for easy replacement after use. This aligns with the environmental trend of green consumption, reduces long-term usage costs for consumers, and meets the dual needs of modern users for beauty tools in terms of functionality and sustainability. It also solves the technical problem that such products are often one-piece designs that are discarded after use.

The present invention relates to a piston pump (1) comprising a piston guide (3) disposed at its end (10b), which is provided with an orifice (30) of a diameter corresponding to the rod diameter (D200) of the piston (20) and a shimming device (32) adapted to center the piston guide (3) on the pump body (10), a kit comprising several pistons and piston guides that can be mounted on the pump, and a method of pumping a liquid using such a piston pump. Figure for the abstract: Fig. 1

A bottle clamping device structure used in filling equipment comprises a filling machine used for liquid filling and an electric telescopic rod with a motor, the top of the inner side of the filling machine is fixedly connected with the electric telescopic rod, and the bottom of the electric telescopic rod is fixedly connected with a bottle clamping device; the bottle clamping device comprises a connecting rod, a guide metal shell is arranged on the outer side of the bottom of the connecting rod, an extrusion block is fixedly connected to the bottom of the connecting rod in a welded mode, an empty bin is formed in the inner side of the guide metal shell, a sliding block is slidably connected to the top of the empty bin, an elastic metal strip is fixedly connected to one end of the sliding block, and a piston is fixedly connected to the bottom of the elastic metal strip. A connecting pipe is arranged at the position, close to the bottom of the empty bin, of the guiding metal shell, a fixing ring is fixedly connected to the other end of the connecting pipe, an air bag is fixedly connected to the outer side of the fixing ring, and a rubber protruding point is fixedly connected to the outer side of the air bag. And the air bag is expanded immediately, so that the bottle opening is effectively prevented from being damaged.

The utility model belongs to refrigerating machine technical field, concretely provides an expander, including cold finger protection cylinder and the base connected in cold finger one end, the cold finger is inlaid with the cold accumulator of sliding, the cavity that base and cold finger enclose forms is equipped with the guide piston, one end of guide piston is fixedly connected with base, the other end sliding sleeve joint has guide cylinder, guide cylinder with cold accumulator is connected. The utility model provides this kind of expander of improvement guide piston and guide cylinder's relative motion structure, make guide cylinder move forward and backward relative to piston after being subjected to gas force, carry out gas compression and expansion to refrigerate, guide piston can be integrated with expander base and process, reduce processing cost. Simultaneously still can join magnetic force spring subassembly, replace leaf spring in axial direction and carry out the location, can effectively reduce the risk of cylinder collision.

The invention relates to the field of gas flow detection, in particular to a modularized switching multi-gas flow measuring device which comprises an operation base, a module switching assembly and a positioning butt joint assembly, a movable control box is movably arranged at the upper end of the operation base through a lifting assembly, and the lifting assembly comprises a plurality of piston guide rods; a throttle pipe is horizontally arranged at the upper end of the operation base, so that the movable control box can move towards the throttle pipe, a pressure difference detection module is arranged at the upper end of the movable control box, and two switchable modularized pressure difference detection modules are arranged in the movable control box, so that when different gases need to be detected, the pressure difference detection modules can be switched according to the attributes of the gases needing to be detected; the proper pressure difference detection module is selected, then the pressure difference detection module is located in the center of the movable control box by switching pushing control of the telescopic rod, then the throttling pipe and the pressure difference detection module are rapidly structured under the cooperation effect of the lifting assembly and the positioning butt joint assembly, operation is easy, and the device is free of worry and convenient to use.

This invention relates to the field of aircraft landing arresting devices, and discloses a non-preloaded arresting pressure relief cylinder and a non-preloaded arresting deceleration system, including a force-bearing rod, a main air cylinder, a piston, a guide rod, an upper baffle, a lower baffle, a one-way exhaust assembly, and a return air assembly. A piston is located at the lower end of the force-bearing rod, and the piston is fixedly connected to the rear end of the guide rod. The diameter of the front end of the guide rod is larger than the diameter of its rear end. The upper baffle is located inside the main air cylinder and has an upper limit flow hole. The diameter of the front end of the guide rod is equal to the diameter of the upper limit flow hole. The lower baffle is located at the lower end of the main air cylinder and has a one-way exhaust assembly and a return air assembly. Both the one-way exhaust assembly and the return air assembly are connected to the main air cylinder. The one-way exhaust assembly is used to discharge part of the gas inside the main air cylinder, and the return air assembly is used to fill the main air cylinder with gas. Compared with the prior art, this invention has the advantages of simple structure and high cost-effectiveness.

The utility model discloses a rapid impact type marking device which comprises an air cylinder body and a piston rod, an exhaust groove is formed in the piston rod and located in the air cylinder body, an air inlet and an air outlet which are arranged in the same row are formed in the air cylinder body, and the air inlet, the exhaust groove and the air outlet are communicated through air channels. A cylinder sealing cover plate is arranged on the cylinder main body and at the head part of the piston rod, a piston guide screw rod is arranged on the cylinder sealing cover plate, the tail part of the piston guide screw rod is connected with an exhaust groove, and a steel seal rod is arranged at the outer end part of the piston rod. And the piston rod can generate instantaneous inertia and strong driving force and impact force during working, so that the steel seal rod can quickly mark the surface of a product and clearly display the mark. The impact tool is simplified in structure, convenient to manufacture and maintain, low in cost and capable of being widely applied to a universal impact tool in a product identification process.

The utility model provides a rapid detection tool for the depth of a groove of a piston guide sleeve, and belongs to the technical field of machinery. The problem that the depth of a groove of an existing piston guide sleeve is inconvenient to detect is solved. The rapid detection tool for the depth of the piston guide sleeve groove comprises a base, the top of the base is provided with a supporting mechanism, the bottom of the supporting mechanism is provided with a detection tool body, the supporting mechanism comprises a first vertical rod, the bottom of the first vertical rod is fixedly connected with the base, the surface of the first vertical rod is sleeved with a connecting block, and the front side of the top of the connecting block is connected with a second vertical rod in a penetrating mode. The bottom of the second vertical rod penetrates to the bottom of the connecting block and is fixedly connected with the testing fixture body, and the right side of the connecting block is connected with a first bolt and a second bolt in a penetrating manner. The tool facilitates the detection of the depth of the piston guide sleeve groove.

The application relates to a piston-housing unit (1) having a piston (2) and a housing (3) which extends along an axis (X) of the piston-housing unit (1), wherein the piston (2) is configured to be movable parallel to the axis (X) and the piston (2) encloses a cavity (4) in the housing (3), the volume of which can be adapted in response to a displacement of the piston (2) parallel to the axis (X), wherein the piston-housing unit (1) has a piston guide (5) arranged in the cavity (4). Furthermore, an actuator operated by a pressure medium, a piston (2) and a housing (3) are disclosed.

The application belongs to the technical field of petroleum drilling equipment, and discloses an integrated hydraulic chuck device, which comprises a shell, end covers, an adjusting mechanism and a clamping mechanism. The end covers are provided in two, and the two end covers are respectively detachably fixed at the two ends of the shell. The adjusting mechanism and the clamping mechanism are arranged in the interior of the shell. The adjusting mechanism comprises two piston guide blocks and two piston bodies. The two piston guide blocks are respectively fixedly connected with the two end covers. The piston bodies are respectively in sliding connection with the shell and the piston guide blocks. The clamping mechanism comprises two jaw seats and two jaw bodies. The two jaw seats are respectively fixedly connected with the two piston bodies. The two jaw seats are respectively provided with dovetail grooves. The jaw body is installed on the jaw seat through the dovetail groove. The two jaw bodies are oppositely arranged to form a clamping hole. The application has compact structure and convenient jaw replacement. During work, the drilling rod can be conveniently and quickly clamped and released, and the operation difficulty and the scratching risk are reduced.

This invention discloses a self-feeding piston pump for rockets, relating to the field of aerospace liquid rocket engine technology; it includes an integrated rotor assembly, a stator upper cover, a stator housing, and a stator lower cover; the rotor assembly integrates the rotor housing, differential piston, guide pin, output shaft, upper and lower bearings, and upper and lower rotary valve cores, which are locked together with fastening screws; the number of cylinders is 2-12, preferably 4 in this embodiment; the stator assembly is sealed and fixed to form a stationary housing, and a sealing valve sleeve is provided corresponding to the rotary valve core, with a crescent-shaped gas distribution groove inside the sealing valve sleeve; the rotary valve core achieves gas distribution through a venting channel that cooperates with the rotor venting hole; the output shaft is inserted into the upper rotary valve core. The rotor assembly is fixed in a blind hole, with upper and lower bearings installed at the upper and lower ends. The stator bearing housings are respectively located on the side of the upper stator cover near the output shaft through hole and on the side of the lower stator cover near the end face. The piston is driven by the high-pressure gas in the combustion chamber to reciprocate and deliver propellant. The motor assists in starting and generating electricity in a steady state. There is no upper limit to the pressure on the supply side of the combustion chamber. The upper pressure limit is determined only by the material strength of the combustion chamber and the pump body. It is preferentially adapted to 450bar~1000bar and detonation combustion conditions. It has the advantages of simple structure, high rotational accuracy, no upper limit to supply pressure, and high reliability. It is suitable for high-pressure propellant supply for liquid rocket engines.

The invention provides an ash removal device utilizing thermal expansion of a pressurizing medium to pressurize explosion. The ash removal device comprises an air storage cylinder, an air inlet and explosion chamber and a piston, the air inlet end of the air cylinder is connected with external superheated steam, and the air outlet end is connected with the air inlet end of the air inlet and explosion chamber and provided with a throat. The air inlet end of the air inlet and explosion chamber is communicated with the throat; the air inlet end of the air inlet and explosion chamber is provided with a horn mouth, and the air outlet side of the horn mouth is connected with a shock wave guide cylinder. A piston guide cylinder and a pressurizing medium air inlet chamber cylinder are fixedly arranged in an inner cavity of the air inlet and explosion chamber; a slope opening is formed in the air inlet end of the piston guide cylinder. A pressurizing medium inlet connecting pipe is arranged at the air outlet end of the pressurizing medium air inlet chamber barrel; an inlet connecting pipe for heating superheated steam during mixing is arranged at the air outlet end of the piston guide cylinder; and the piston operates among the throat, the superheated steam inlet chamber and the pressurizing medium inlet chamber. The device is safe and reliable to use, economical, practical, capable of achieving continuous, rapid and multi-time explosion ash removal, good in ash removal effect, high in efficiency and wider in application range.

The invention relates to a movement assembly (10), in particular for drawers, sliding doors, sliding windows or similar movable sliding elements (100), in particular furniture parts, comprising a retraction device (20), in which the retraction device (20) has a housing (21), which is equipped with a damper (30), which comprises a cylinder (31) and a piston guided in the cylinder (31), an actuator (32), in particular a piston rod, is connected to the piston in such a way that a trigger (50, 60) is each indirectly or directly associated with the cylinder (31) and the actuator (32), the trigger (50, 60) being adjustable from a locking position into a parking position in order to lock an actuator (11, 14) associated with the trigger (50, 60) in the locking position and release the actuator in the release position. According to the invention, if the actuator (32) and the cylinder (31) are prearranged to be guided by means of a guide element independently of the trigger (50, 60), such a movement assembly provides a configuration that operates reliably and can withstand high loads.

To provide a liquid dispenser and liquid dispenser container that are less prone to leakage during priming operations. [Solution] The liquid dispenser 1 comprises a mounting part 3 that can be attached to the container body 2, a cylinder 41 fixed to the mounting part 3, a piston 44 that can slide vertically inside the cylinder 41, a piston guide 45 that holds the piston 44 so that it can slide vertically, a stem 46 fixed to the piston guide 45 so that it can press the piston 44 downward together with the piston guide 45, and an air exchange hole A41 that penetrates the cylinder 41 radially. The air exchange hole A41 is located below the lowest end of the piston 44 when the piston 44 is at top dead center. The liquid dispenser container 100 comprises the liquid dispenser 1 and the container body 2.

The invention comprises a working device for driving a fastening element into a substrate, comprising - a working piston guide which has a cavity, - a working piston, wherein the working piston is arranged in the working device in the cavity of the working piston guide so as to be movable along a setting axis, - a pressing device for transferring the working device from a driving-in mode into a braking mode, - a pressing sensor, wherein the pressing sensor is directly in contact with the substrate in the driving-in mode, - a pressing spring, wherein the pressing spring is connected to the pressing sensor, such that the pressing spring is tensioned in the driving-in mode and released in the braking mode, such that the pressing sensor can be moved in a setting direction of the working device, - a braking element for reducing recoil energy in the working device, wherein the braking element is contacted by the pressing device.

A pneumatic brake cylinder of a vehicle brake has a brake cylinder housing, a brake piston guided axially in the brake cylinder housing with an extendable and retractable piston rod, which projects through an opening in a bottom of the brake cylinder housing, and a brake chamber which can be ventilated and exhausted. A fastening device is provided for the detachable fastening of the brake cylinder to a support structure for the brake cylinder, and includes at least one fastening bolt projecting away from the brake cylinder housing in the region of the bottom. A venting device interacts with the return spring chamber such that, in the event of a change in the volume of the return spring chamber as a result of a movement of the brake piston, air can pass out of the return spring chamber or into the return spring chamber by the venting device. The ventilation device includes the at least one fastening bolt which has at least one internal channel which opens, on the one hand, with a first mouth into the return spring chamber and, on the other hand, with a second mouth into an outer area of the brake cylinder.

The utility model discloses a kind of manual liquid supplementing pumps, it is related to liquid supplementing pump technical field, including pump body, the inner wall of pump body is equipped with piston cavity and valve cavity, the inner wall sliding connection of piston cavity has piston rod, the inner wall sliding connection of piston rod has piston guide rod, the surface of piston guide rod is provided with buffer assembly, one-way valve is threadedly connected in the valve cavity, the number of one-way valve is two, two described one-way valve are located at the top of pump body and the right end of pump body respectively, the surface of pump body is provided with the cleaning assembly of preventing impurity from entering pump body interior, the utility model can effectively prevent external impurities from entering inside, avoid that impurity causes abrasion to liquid supplementing pump inside, can effectively buffer inside, avoid in frequent start-stop process, cause internal structure damage, in addition, the liquid outlet direction can be freely adjusted, provide more selection for installation position, so that liquid supplementing pump is more flexible to use.

The utility model provides a hydraulic tester for expansibility performance of a solid-state battery, which comprises a base, four upright posts are fixed at four corners of the top of the base, an upper cross beam is fixed at the tops of the upright posts, a loading connecting rod is arranged at the bottom of the center of the upper cross beam, and an upper pressure plate is fixed at the bottom of the loading connecting rod. A lower pressing disc is arranged at the position, corresponding to the upper pressing disc, of the top of the base, a piston guide plate is fixed to the surface of the middle of the loading connecting rod, the four stand columns are sleeved with the piston guide plate in a sliding mode, deformation measuring instruments are installed on the two sides of the piston guide plate, and the bottoms of the deformation measuring instruments are fixedly connected with the lower pressing disc. The base can be conveniently fixed on a table top through the screw hole and the mute pad on the base, noise generated during working is reduced, compared with the prior art, the control system controls the hydraulic oil cylinder piston to move, the deformation meter measures sample deformation, so that a compression pressure maintaining test of a sample is completed, and the compression pressure maintaining device has sufficient rigidity, stable operation and high efficiency.

The utility model relates to a large-caliber two-way normally-closed electromagnetic valve for an air compressor, which comprises a main valve body, a pilot electromagnetic valve body arranged on the main valve body, a piston upper cavity arranged in the pilot electromagnetic valve body, a piston arranged in the piston upper cavity, a piston return spring sleeved on the piston, and a piston guide rod connected with the bottom of the piston. The top of the piston is connected with a pilot electromagnetic valve movable iron core, a pilot electromagnetic valve movable iron core sealing piece is embedded in the bottom of the pilot electromagnetic valve movable iron core, the pilot electromagnetic valve movable iron core is sleeved with a movable iron core reset spring, the upper portion of the pilot electromagnetic valve movable iron core is arranged in an electromagnetic valve coil, the electromagnetic valve coil is of a double-sealing structure, and first sealing rings are arranged on the upper portion and the lower portion of the electromagnetic valve coil respectively. The air compressor sealing device is good in sealing effect, flexible in piston operation, high in applicability and capable of meeting control requirements of a conventional air compressor.

The invention discloses a press-fitting device and press-fitting equipment, the press-fitting device is used for press-fitting a dust cover on a piston to form calipers, the dust cover comprises an outer ring part and an inner ring part arranged in the outer ring part, and the press-fitting device comprises a clamp seat, a guide clamp, a first pressure head and a second pressure head; the clamp base is used for bearing a dust cover to be pressed and a piston, the guide clamp is arranged below the first pressing head, the first pressing head is movably connected to the clamp base and used for pressing an outer ring part downwards, and the second pressing head is movably connected into the first pressing head and used for pressing an inner ring part downwards; and when the first pressing head is pressed downwards, the guide clamp is used for clamping the outer ring part, so that the dust cover and the piston are coaxial. According to the press-fitting device, automatic press-fitting of the dust cover and the piston can be achieved, the coaxiality of the dust cover and the piston can be guaranteed in the press-fitting process, it is guaranteed that the inner ring part and the outer ring part are kept synchronous in the press-fitting process, and the coaxiality and the press-fitting quality in the press-fitting process are further improved.

The invention relates to a piston housing unit (1) comprising: - a piston (3), - a housing (2), wherein the piston (3) is provided in the housing (2) so as to be displaceable along an axis (X) and is connected to a transmission element (5) of the piston housing unit (1), wherein the transmission element (5) is supported by a first bearing (6) and a second bearing (7). The invention also relates to a piston (3), a housing (2), a transmission element (5) and an actuator (10).