阅读说明：本技术 一种活塞缸伸缩杆密封防尘装置及使用该装置的活塞缸 (Piston cylinder telescopic rod sealing dustproof device and piston cylinder using same ) 是由 董青山 毛君豪 丁岩 刘广磊 赵文龙 于 2021-08-31 设计创作，主要内容包括：本发明提供了一种活塞缸伸缩杆密封防尘装置及使用该装置的活塞缸,活塞缸伸缩杆密封防尘装置包括：密封防尘罩；固定板,设有供密封防尘罩的端部套设的凸缘,固定板用于固定在缸体或推板上；弹性卡环,安装在密封防尘罩端部,将密封防尘罩端部卡紧固定在凸缘上,弹性卡环为非封闭的卡环；锁座,锁座上设有供弹性卡环两端穿入的穿孔,锁座上还螺纹连接有用于分别顶紧弹性卡环两端的第一顶紧螺栓和第二顶紧螺栓。本发明在使用时,只需将固定板固定在缸体或推板上,密封防尘罩连接时,只需保证弹性卡环安装在密封防尘罩端部,使弹性卡环产生弹性变形,利用锁座上的顶紧螺栓固定弹性卡环两端即可,连接比较方便,可提高安装效率。(The invention provides a piston cylinder telescopic rod sealing dustproof device and a piston cylinder using the same, wherein the piston cylinder telescopic rod sealing dustproof device comprises: sealing the dust cover; the fixed plate is provided with a flange for sleeving the end part of the sealing dust cover and is used for being fixed on the cylinder body or the push plate; the elastic clamping ring is arranged at the end part of the sealing dust cover, and is used for clamping and fixing the end part of the sealing dust cover on the flange; the lock seat is provided with through holes for the two ends of the elastic clamping ring to penetrate through, and the lock seat is further connected with a first tightening bolt and a second tightening bolt which are used for tightening the two ends of the elastic clamping ring respectively in a threaded mode. When the anti-theft device is used, only the fixing plate needs to be fixed on the cylinder body or the push plate, when the sealing dust cover is connected, only the elastic clamping ring needs to be arranged at the end part of the sealing dust cover, the elastic clamping ring generates elastic deformation, and the two ends of the elastic clamping ring are fixed by the tightening bolts on the lock seats, so that the connection is convenient, and the installation efficiency can be improved.)

1. The utility model provides a piston cylinder telescopic link seals dust keeper which characterized in that includes:

the sealing dust cover is sleeved on the periphery of the telescopic rod of the piston cylinder;

the fixed plate is provided with a flange (6-1) for sleeving the end part of the sealed dust cover, and a fixed hole (6-2), wherein the fixed hole (6-2) is used for fixing the fixed plate on the cylinder body (1) or the push plate (4) at the end part of the telescopic rod;

the elastic clamping ring (10) is arranged at the end part of the sealed dust cover and used for clamping and fixing the end part of the sealed dust cover on the flange (6-1), and the elastic clamping ring (10) is a non-closed clamping ring so that two ends of the elastic clamping ring (10) can be close to or far away from each other under the elastic action;

the lock comprises a lock seat (11), wherein a through hole (11-1) for penetrating through two ends of an elastic clamping ring (10) is formed in the lock seat (11), a first puller bolt (12) and a second puller bolt (13) which are used for respectively puller the two ends of the elastic clamping ring (10) are connected to the lock seat (11) in a threaded mode, or a puller screw used for simultaneously puller the two ends of the elastic clamping ring (10) is connected to the lock seat (11) in a threaded mode.

2. The piston cylinder telescopic rod sealing and dust preventing device according to claim 1, wherein an annular rib is arranged at the end part of the sealing and dust preventing cover, an annular cavity (5-1-1) for installing the elastic snap ring (10) is arranged in the annular rib, an installation groove (5-1-2) communicated with the annular cavity (5-1-1) is further arranged on the annular rib, the installation groove (5-1-2) is used for installing the elastic snap ring (10) into the annular cavity (5-1-1), and the installation groove (5-1-2) is further used for arranging the lock seat (11).

3. The sealing and dust-proof device for the telescopic rod of the piston cylinder and the telescopic rod of the piston cylinder as claimed in claim 2, wherein the bottom wall of the mounting groove (5-1-2) is an arc-shaped wall extending along the circumferential direction of the annular rib, and the lock seat (11) is provided with a contact wall (11-3) which is in contact fit with the bottom wall of the mounting groove (5-1-2).

4. The piston cylinder telescopic rod sealing and dust preventing device according to claim 2 or 3, characterized in that a plurality of mounting grooves (5-1-2) are arranged at intervals along the circumferential direction of the annular rib.

5. The piston cylinder telescopic rod sealing and dust preventing device according to any one of claims 1 to 3, wherein the through hole (11-1) is a curved through hole.

6. The sealing and dust-proof device for the telescopic rod of the piston cylinder according to any one of claims 1 to 3, wherein the peripheries of two ends of the elastic snap ring (10) are respectively provided with a jacking plane (10-1) for jacking the first jacking bolt (12) and the second jacking bolt (13) or jacking screws.

7. The sealing and dust-preventing device for the telescopic rod of the piston cylinder as claimed in any one of claims 1 to 3, wherein the sealing and dust-preventing cover is an elastic film cover, an outward convex framework which protrudes outwards is integrally formed on the elastic film cover, and the diameter of the outward convex framework is larger than the diameter of two ends of the elastic film cover.

8. The telescopic rod sealing and dust-preventing device for the piston cylinders as claimed in claim 7, wherein the number of the convex frameworks is two, an inward convex framework (5-5) protruding inwards is further integrally formed between the two convex frameworks on the elastic film cover, and the diameter of the inward convex framework (5-5) is smaller than that of the convex frameworks.

9. The piston cylinder telescopic rod sealing and dust preventing device according to any one of claims 1 to 3, wherein the flange (6-1) comprises a vertical wall (6-1-1) and an extension wall (6-1-2), the vertical wall (6-1-1) is perpendicular to the fixing plate, the extension wall (6-1-2) is located at the end of the vertical wall (6-1-1) and extends outwards in the radial direction of the vertical wall (6-1-1), and a sleeve groove for sleeving the end of the sealing and dust preventing cover is formed among the extension wall (6-1-2), the vertical wall (6-1-1) and the fixing plate.

10. A piston cylinder comprises a cylinder body, a telescopic rod, a push plate arranged at the end part of the telescopic rod and a telescopic rod sealing dustproof device, and is characterized in that the telescopic rod sealing dustproof device is the same as the telescopic rod sealing dustproof device of the piston cylinder according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of sealing and dustproof devices, in particular to a piston cylinder telescopic rod sealing and dustproof device and a piston cylinder using the same.

Background

The valve bag packing machine is widely applied to automatic quantitative packing of thin materials and comprises an automatic feeding system, a weighing unit, a bag clamping unit, a discharging and air returning system and an electric control unit. The valve bag packaging machine is provided with a plurality of cylinders, such as a bag pushing cylinder, a bag unloading cylinder and the like, because the cylinders are applied to the environment with more dust, the normal work and the service life of the cylinders are influenced in order to avoid the dust or powder adhering to the piston rods of the cylinders, and a sealing dustproof device is required to be installed outside the piston rods of the cylinders.

For example, the chinese utility model patent with the publication number CN206054746U discloses a small-sized cylinder protection device for automated production equipment, which comprises a cylinder and a protection sleeve arranged on the periphery of the piston rod of the cylinder, wherein the cylinder comprises a cylinder body and a motion plate (push plate) arranged at the front end of the piston rod. The lag is collapsible elasticity silica gel cover, and it is the tubbiness structure, is equipped with a plurality of annular beta structures at the lateral wall of tubbiness structure, and the lag still is equipped with bottom connecting portion and top connecting portion, the cylinder body fixed connection of bottom connecting portion and cylinder, top connecting portion and motion board fixed connection, and the lag can be followed piston rod axial direction coincide or expand.

Above-mentioned lag can play sealed dirt-proof effect to the piston rod, but the both ends of lag need respectively with cylinder body and push pedal fixed connection, and prior art does not give concrete connecting means, and the actual connection operation is more troublesome, influences the installation effectiveness.

Disclosure of Invention

The invention aims to provide a piston cylinder telescopic rod sealing dustproof device convenient to connect; the invention also aims to provide the piston cylinder which is convenient to assemble.

In order to achieve the purpose, the telescopic rod sealing and dust preventing device for the piston cylinder adopts the following technical scheme:

the utility model provides a piston cylinder telescopic link seals dust keeper, includes:

the sealing dust cover is sleeved on the periphery of the telescopic rod of the piston cylinder;

the fixed plate is provided with a flange for sleeving the end part of the sealing dust cover, and is also provided with a fixed hole for fixing the fixed plate on the cylinder body or a push plate at the end part of the telescopic rod;

the elastic clamping ring is arranged at the end part of the sealed dust cover and used for clamping and fixing the end part of the sealed dust cover on the flange, and the elastic clamping ring is a non-closed clamping ring so that two ends of the elastic clamping ring can approach or depart from each other under the elastic action;

the lock seat is provided with the perforation that the both ends of confession elasticity snap ring penetrated on the lock seat, and it has first puller bolt and the second puller bolt that is used for pushing up elasticity snap ring both ends respectively to go back threaded connection on the lock seat, perhaps it has the puller screw that is used for pushing up elasticity snap ring both ends simultaneously to go back threaded connection on the lock seat.

The beneficial effects of the above technical scheme are that: the sealing dust cover is sleeved on the periphery of the telescopic rod, the end part of the sealing dust cover is sleeved on the flange on the fixing plate and is clamped and fixed on the flange through the elastic clamping ring, the elastic clamping ring is a non-closed clamping ring, and two ends of the elastic clamping ring can be close to or far away from the elastic clamping ring under the elastic action, so that the elastic clamping ring is convenient to install; meanwhile, the piston cylinder telescopic rod sealing dustproof device also comprises a lock seat, wherein the lock seat is provided with through holes for the two ends of the elastic clamping ring to penetrate through, so that after the elastic clamping ring is arranged at the end part of the sealing dustproof cover, the two ends of the elastic clamping ring are close to each other by enabling the elastic clamping ring to generate elastic deformation, and the elastic clamping ring can conveniently penetrate through the through holes in the lock seat; the lock seat is also in threaded connection with a first puller bolt and a second puller bolt which can respectively jack two ends of the elastic snap ring, or the lock seat is in threaded connection with puller bolts which can jack two ends of the elastic snap ring simultaneously so as to fix the shape of the elastic snap ring, and the end part of the sealed dust cover is clamped and fixed on the flange through the elastic snap ring, so that the connection between the end part of the sealed dust cover and the fixed plate is realized; the fixed plate is used for being fixed on the cylinder body or a push plate at the end part of the telescopic rod, so that the telescopic rod is covered by the sealing dustproof cover, and a good sealing dustproof effect is achieved.

In summary, when the piston cylinder telescopic rod sealing dust-proof device is used, only the fixing plate needs to be fixed on the cylinder body or the push plate at the end part of the telescopic rod, when the sealing dust cover is connected, only the elastic clamping ring needs to be installed at the end part of the sealing dust cover, then the elastic clamping ring generates elastic deformation, and the first tightening bolt and the second tightening bolt or the tightening bolt on the lock seat are used for fixing the two ends of the elastic clamping ring, so that the connection is convenient, and the installation efficiency can be improved.

Furthermore, the tip of sealed dust cover is provided with annular muscle, is provided with the annular chamber that is used for installing the snap ring in the annular muscle, still is provided with the mounting groove with the annular chamber intercommunication on the annular muscle, the mounting groove is used for supplying snap ring to pack into the annular chamber, the mounting groove still is used for setting up the lock seat.

The beneficial effects of the above technical scheme are that: the annular cavity can make things convenient for the snap ring to often put, makes the snap ring clitellum at sealed shield, and further makes things convenient for the connection operation, and the setting of mounting groove has both made things convenient for snap ring's installation, has also made things convenient for the setting of lock seat.

Further, the groove diapire of mounting groove is the arc wall of the circumference extension along annular muscle, and the lock seat has the contact wall of the tank bottom wall contact laminating with the mounting groove.

The beneficial effects of the above technical scheme are that: the processing and the installation are convenient.

Further, the mounting grooves are arranged along the circumferential direction of the annular rib at intervals.

The beneficial effects of the above technical scheme are that: the installation of the elastic snap ring is convenient, and the lock seat is also convenient to be matched and fixed with the two ends of the elastic snap ring.

Further, the through hole is a curved through hole.

The beneficial effects of the above technical scheme are that: the installation at convenient elasticity snap ring both ends facilitates the use.

Furthermore, the peripheries of the two ends of the elastic clamping ring are respectively provided with a jacking plane for jacking the first jacking bolt and the second jacking bolt or jacking screws.

The beneficial effects of the above technical scheme are that: the top pressing fit is convenient, and the top pressing effect is ensured.

Furthermore, the sealing dust cover is an elastic film cover, an outward convex framework which protrudes outwards is integrally formed on the elastic film cover, and the diameter of the outward convex framework is larger than the diameter of the two ends of the elastic film cover.

The beneficial effects of the above technical scheme are that: the elastic film cover adapts to the extension and retraction of the telescopic rod through elastic deformation, so that the phenomenon that excessive wrinkles are formed to influence the moving space of the telescopic rod is avoided; the diameter of the convex framework is larger than the diameters of the two ends of the elastic film cover, so that the elastic film cover is convenient to deform.

Furthermore, the number of the convex frameworks is two, an inward convex framework which protrudes inwards is integrally formed between the two convex frameworks on the elastic film cover, and the diameter of the inward convex framework is smaller than that of the convex frameworks.

The beneficial effects of the above technical scheme are that: the two convex frameworks are arranged, the inner convex framework is arranged between the two convex frameworks, the length of the elastic film cover is enough, the telescopic rod can be suitable for a longer telescopic rod, and meanwhile deformation of the elastic film cover can be facilitated.

Further, the flange includes a vertical wall perpendicular to the fixing plate and an extension wall located at an end of the vertical wall and extending outward in a radial direction of the vertical wall, and a housing groove for housing an end of the dust cover is formed between the extension wall, the vertical wall and the fixing plate.

The beneficial effects of the above technical scheme are that: the convenient cover of the tip of sealed dust cover is established to can guarantee the connection effect.

In order to achieve the purpose, the piston cylinder adopts the following technical scheme:

the utility model provides a piston cylinder, includes cylinder body, telescopic link, installs push pedal and the sealed dust keeper of telescopic link at the telescopic link tip, the sealed dust keeper of telescopic link includes:

the sealing dust cover is sleeved on the periphery of the telescopic rod of the piston cylinder;

the fixed plate is provided with a flange for sleeving the end part of the sealing dust cover, and is also provided with a fixed hole for fixing the fixed plate on the cylinder body or a push plate at the end part of the telescopic rod;

the elastic clamping ring is arranged at the end part of the sealed dust cover and used for clamping and fixing the end part of the sealed dust cover on the flange, and the elastic clamping ring is a non-closed clamping ring so that two ends of the elastic clamping ring can approach or depart from each other under the elastic action;

the lock seat is provided with the perforation that the both ends of confession elasticity snap ring penetrated on the lock seat, and it has first puller bolt and the second puller bolt that is used for pushing up elasticity snap ring both ends respectively to go back threaded connection on the lock seat, perhaps it has the puller screw that is used for pushing up elasticity snap ring both ends simultaneously to go back threaded connection on the lock seat.

The beneficial effects of the above technical scheme are that: the sealing dust cover is sleeved on the periphery of the telescopic rod, the end part of the sealing dust cover is sleeved on the flange on the fixing plate and is clamped and fixed on the flange through the elastic clamping ring, the elastic clamping ring is a non-closed clamping ring, and two ends of the elastic clamping ring can be close to or far away from the elastic clamping ring under the elastic action, so that the elastic clamping ring is convenient to install; meanwhile, the telescopic rod sealing dustproof device also comprises a lock seat, wherein the lock seat is provided with through holes for the two ends of the elastic clamping ring to penetrate through, so that after the elastic clamping ring is arranged at the end part of the sealing dustproof cover, the two ends of the elastic clamping ring are close to each other by causing the elastic clamping ring to generate elastic deformation, and the elastic clamping ring can conveniently penetrate through the through holes in the lock seat; the lock seat is also in threaded connection with a first puller bolt and a second puller bolt which can respectively jack two ends of the elastic snap ring, or the lock seat is in threaded connection with puller bolts which can jack two ends of the elastic snap ring simultaneously so as to fix the shape of the elastic snap ring, and the end part of the sealed dust cover is clamped and fixed on the flange through the elastic snap ring, so that the connection between the end part of the sealed dust cover and the fixed plate is realized; the fixed plate is used for being fixed on the cylinder body or a push plate at the end part of the telescopic rod, so that the telescopic rod is covered by the sealing dustproof cover, and a good sealing dustproof effect is achieved.

In summary, when the telescopic rod sealing dust-proof device is used, the fixing plate is only required to be fixed on the cylinder body or the push plate at the end part of the telescopic rod, when the sealing dust cover is connected, the elastic snap ring is only required to be installed at the end part of the sealing dust cover, then the elastic snap ring is elastically deformed, and the two ends of the elastic snap ring are fixed by the first puller bolt and the second puller bolt or the puller bolt on the lock seat, so that the connection and the assembly are convenient, and the installation efficiency can be improved.

Furthermore, the tip of sealed dust cover is provided with annular muscle, is provided with the annular chamber that is used for installing the snap ring in the annular muscle, still is provided with the mounting groove with the annular chamber intercommunication on the annular muscle, the mounting groove is used for supplying snap ring to pack into the annular chamber, the mounting groove still is used for setting up the lock seat.

The beneficial effects of the above technical scheme are that: the annular cavity can make things convenient for the snap ring to often put, makes the snap ring clitellum at sealed shield, and further makes things convenient for the connection operation, and the setting of mounting groove has both made things convenient for snap ring's installation, has also made things convenient for the setting of lock seat.

Further, the groove diapire of mounting groove is the arc wall of the circumference extension along annular muscle, and the lock seat has the contact wall of the tank bottom wall contact laminating with the mounting groove.

The beneficial effects of the above technical scheme are that: the processing and the installation are convenient.

Further, the mounting grooves are arranged along the circumferential direction of the annular rib at intervals.

The beneficial effects of the above technical scheme are that: the installation of the elastic snap ring is convenient, and the lock seat is also convenient to be matched and fixed with the two ends of the elastic snap ring.

Further, the through hole is a curved through hole.

The beneficial effects of the above technical scheme are that: the installation at convenient elasticity snap ring both ends facilitates the use.

Furthermore, the peripheries of the two ends of the elastic clamping ring are respectively provided with a jacking plane for jacking the first jacking bolt and the second jacking bolt or jacking screws.

The beneficial effects of the above technical scheme are that: the top pressing fit is convenient, and the top pressing effect is ensured.

Furthermore, the sealing dust cover is an elastic film cover, an outward convex framework which protrudes outwards is integrally formed on the elastic film cover, and the diameter of the outward convex framework is larger than the diameter of the two ends of the elastic film cover.

The beneficial effects of the above technical scheme are that: the elastic film cover adapts to the extension and retraction of the telescopic rod through elastic deformation, so that the phenomenon that excessive wrinkles are formed to influence the moving space of the telescopic rod is avoided; the diameter of the convex framework is larger than the diameters of the two ends of the elastic film cover, so that the elastic film cover is convenient to deform.

Furthermore, the number of the convex frameworks is two, an inward convex framework which protrudes inwards is integrally formed between the two convex frameworks on the elastic film cover, and the diameter of the inward convex framework is smaller than that of the convex frameworks.

The beneficial effects of the above technical scheme are that: the two convex frameworks are arranged, the inner convex framework is arranged between the two convex frameworks, the length of the elastic film cover is enough, the telescopic rod can be suitable for a longer telescopic rod, and meanwhile deformation of the elastic film cover can be facilitated.

Further, the flange includes a vertical wall perpendicular to the fixing plate and an extension wall located at an end of the vertical wall and extending outward in a radial direction of the vertical wall, and a housing groove for housing an end of the dust cover is formed between the extension wall, the vertical wall and the fixing plate.

Drawings

FIG. 1 is a perspective view of one embodiment of a piston cylinder of the present invention;

FIG. 2 is an exploded view of the piston cylinder of FIG. 1;

FIG. 3 is a perspective view of the first dust sealing cap of FIGS. 1 and 2 (with the first dust sealing cap in a deployed state);

FIG. 4 is an enlarged view taken at A in FIG. 3;

FIG. 5 is a block diagram of the first dust seal cover of FIG. 4 with the snap ring and the latch bracket removed;

FIG. 6 is a perspective cross-sectional view of the first dust seal cover of FIGS. 1 and 2;

FIG. 7 is a perspective view of the resilient snap ring of FIGS. 3 and 4;

FIG. 8 is a perspective view of the latch receptacle of FIGS. 3 and 4;

fig. 9 is a perspective view of the first fixing plate of fig. 1 and 2;

figure 10 is a block diagram of the first dust seal in a retracted state.

In the figure: 1. a cylinder body; 2. a piston rod; 3. a guide bar; 4. pushing the plate; 5. a first sealed dust cover; 5-1, a first annular rib; 5-1-1, a ring cavity; 5-1-2, mounting groove; 5-2, second annular ribs; 5-3, a first convex framework; 5-4, a second convex framework; 5-5, an inward convex framework; 6. a first fixing plate; 6-1, flanges; 6-1-1, vertical wall; 6-1-2, an extension wall; 6-2, fixing holes; 7. a second fixing plate; 8. a second sealed dust cover; 9. a third fixing plate; 10. an elastic snap ring; 10-1, pressing a plane; 11. a lock seat; 11-1, perforating; 11-2, a threaded hole; 11-3, a contact wall; 12. a first puller bolt; 13. and the second puller bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

An embodiment of a piston cylinder in the invention is shown in fig. 1, the piston cylinder in the embodiment is a cylinder which is applied to a valve bag packaging machine for pushing bags, the basic structure and the working principle of the cylinder are the same as those of the prior art, and the piston cylinder comprises a cylinder body 1, a telescopic rod and a push plate 4 which is arranged at the end part of the telescopic rod, and the telescopic rod comprises a piston rod 2 and two guide rods 3 as the cylinder is specifically a guide rod cylinder, which is shown in fig. 2.

The cylinder further comprises a telescopic rod sealing dustproof device, as shown in fig. 1 and 2, the telescopic rod sealing dustproof device in the embodiment comprises three first sealing dustproof covers 5 which are respectively sleeved on the peripheries of the piston rod 2 and the two guide rods 3, and therefore the number of the first sealing dustproof covers 5 is three, the three first sealing dustproof covers 5 are all made of super-rebound thin film materials, and the first sealing dustproof covers 5 are elastic thin film covers.

The telescopic rod sealing dustproof device further comprises a first fixing plate 6 and a second fixing plate 7, and flanges for sleeving two end parts of the first sealing dustproof cover 5 are respectively arranged on the first fixing plate 6 and the second fixing plate 7. Taking the first fixing plate 6 as an example, as shown in fig. 9, the first fixing plate 6 is provided with three flanges 6-1, each flange 6-1 includes a vertical wall 6-1-1 and an extension wall 6-1-2, the vertical wall 6-1-1 is perpendicular to the first fixing plate 6, the extension wall 6-1-2 is located at an end of the vertical wall 6-1-1 and extends outward in a radial direction of the vertical wall 6-1-1, and a sleeve groove for the end of the first dust sealing cover 5 to sleeve is formed between the extension wall 6-1-2, the vertical wall 6-1-1 and the first fixing plate 6. In addition, the first fixing plate 6 is also provided with four fixing holes 6-2, and the four fixing holes 6-2 are used for fixing the first fixing plate 6 on the push plate 4.

The telescopic rod sealing and dust preventing device further comprises elastic clamping rings, for example, elastic clamping rings 10 at the right ends as shown in fig. 3, 4 and 10, respectively installed at the left and right ends of the first dust sealing cover 5, and the elastic clamping rings 10 are used for clamping and fixing the right end part of the first dust sealing cover 5 on the flange 6-1. As shown in fig. 7, the elastic snap ring 10 is an unclosed snap ring, and both ends of the elastic snap ring 10 can be close to or far away from each other under the elastic action.

Specifically, as shown in fig. 3, 6 and 10, the first dust seal cover 5 has a first annular rib 5-1 integrally formed at the right end thereof and a second annular rib 5-2 integrally formed at the left end thereof, and the annular ribs at both ends have circular cross sections and thick wall thicknesses, and can maintain a certain shape and have elasticity. Taking the first annular rib 5-1 as an example, as shown in fig. 4 and 5, an annular cavity 5-1-1 for installing the elastic snap ring 10 is arranged in the first annular rib 5-1, and an installation groove 5-1-2 communicated with the annular cavity 5-1-1 is further arranged on the first annular rib 5-1, so that the elastic snap ring 10 is installed in the annular cavity 5-1-1.

The telescopic rod sealing dustproof device also comprises a lock seat 11 arranged in the mounting groove 5-1-2, as shown in fig. 8, a through hole 11-1 for the two ends of the elastic clamping ring 10 to penetrate through is arranged on the lock seat 11, and the through hole 11-1 is a bent through hole; referring to fig. 5, the bottom wall of the mounting groove 5-1-2 is an arc wall extending along the circumferential direction of the first annular rib 5-1, the lock base 11 has a contact wall 11-3 contacting and fitting with the bottom wall of the mounting groove 5-1-2, and the width of the mounting groove 5-1-2 in the circumferential direction is equal to the length of the lock base 11 in the circumferential direction, i.e. the structure and the size of the two are matched.

As shown in fig. 4, the lock housing 11 is further threadedly connected with a first tightening bolt 12 and a second tightening bolt 13 for tightening both ends of the snap ring 10, respectively, so that as shown in fig. 8, two threaded holes 11-2 are provided in the lock housing 11 for mounting the first tightening bolt 12 and the second tightening bolt 13, respectively, although the two threaded holes 11-2 are communicated with the through hole 11-1. In order to facilitate the pressing of the first tightening bolt 12 and the second tightening bolt 13, as shown in fig. 7, pressing planes 10-1 for pressing the first tightening bolt 12 and the second tightening bolt 13 are respectively provided on the peripheries of both ends of the elastic snap ring 10.

When the elastic snap ring 10 is installed for the first time, the elastic snap ring 10 is installed into the first annular rib 5-1 through the installation groove 5-1-2, the elastic snap ring 10 does not need to be detached in the later use process, two ends of the elastic snap ring 10 are in a far away state in a natural state, so that the first annular rib 5-1 is conveniently sleeved outside the flange 6-1, the lock seat 11 is placed into the installation groove 5-1-2 after the sleeving is completed, the elastic snap ring 10 is extruded, two ends of the elastic snap ring 10 penetrate into the lock seat 11, preferably two ends of the elastic snap ring are abutted, then the first jacking bolt 12 and the second jacking bolt 13 are screwed, the positions of the two ends are fixed, and the right end of the first sealed dust cover 5 can be fixed on the first fixing plate 6.

In order to facilitate the arrangement of the lock seat 11 and further facilitate the two ends of the elastic snap ring 10 to penetrate into the lock seat 11, the installation grooves 5-1-2 are arranged at intervals along the circumferential direction of the first annular rib 5-1, so that the installation grooves 5-1-2 at proper positions can be selected to place the lock seat 11, and the installation is facilitated.

The left end of the first dust cover 5 is connected in the same manner as the right end, and therefore, the connection is not repeated, when the left end and the right end of the first dust cover 5 are respectively connected to the second fixing plate 7 and the first fixing plate 6, and the second fixing plate 7 and the first fixing plate 6 are respectively fixed on the right end surface of the cylinder body 1 and the push plate 4, the first dust cover 5 can be unfolded or folded along with the telescopic movement of the piston rod 2 and the guide rod 3, that is, stretched or contracted.

Since the first dust cover 5 is an elastic film cover, in order to facilitate the stretching deformation and the contraction rebound of the first dust cover, as shown in fig. 3, 6 and 10, two outward convex frameworks which are respectively a first outward convex framework 5-3 and a second outward convex framework 5-4 are integrally formed on the first dust cover 5, and the wall thickness of the outward convex frameworks is slightly thicker, so that a certain shape can be maintained. Meanwhile, an inward convex framework 5-5 which protrudes inwards is integrally formed between the two outward convex frameworks on the first sealing dust cover 5, and the inward convex framework 5-5 is the same as the outward convex frameworks in the same way, has slightly thicker wall thickness and can keep a certain shape. And the diameter of the inner convex framework 5-5 is smaller than the diameter of the two convex frameworks, and the diameter of the second outer convex framework 5-4 is larger than the diameter of the first outer convex framework 5-3, larger than the diameter of the second annular rib 5-2, and larger than the diameter of the first annular rib 5-1.

Thus, when the first dust seal cover 5 is stretched and deformed, as shown in fig. 1, 2, 3 and 6, the first annular rib 5-1, the second annular rib 5-2, the first outward convex framework 5-3, the second outward convex framework 5-4 and the inward convex framework 5-5 still keep the shape thereof, the super-rebound film material between the first annular rib 5-1 and the second annular rib 5-2, the first outward convex framework 5-3, the second outward convex framework 5-4 and the inward convex framework 5-5 is stretched and tapered due to the characteristics thereof, the super-rebound film is stretched and air-tight, and the two fixing plates are respectively fixed on the cylinder body 1 and the push plate 4 to seal the two ends of the first dust seal cover 5 to form a completely closed cavity, so that the air inside and the air outside the cover body are not communicated, thereby greatly protecting the piston rod 2 and the guide rod 3 from the pollution of micro-dust in the air, ensuring the lubrication and cleanness of the linear bearing on the guide rod 3 and ensuring the service life of the linear bearing. When the first sealing dust cover 5 contracts and rebounds, as shown in fig. 10, under the supporting action of the annular ribs at the two ends and the middle framework, an organ-shaped contraction pleat is formed, the volume is very small, the space between the cylinder body 1 and the push plate 4 is not occupied too much, and the normal use of the cylinder is ensured.

In addition, as shown in fig. 1 and 2, the telescopic rod sealing and dust preventing device in this embodiment further includes a third fixing plate 9 fixed on the left end surface of the cylinder 1 and a second dust sealing cover 8 connected to the third fixing plate 9, the third fixing plate 9 has substantially the same structure as the first fixing plate 6, the second dust sealing cover 8 is connected to the third fixing plate 9 in the same manner as the first dust sealing cover 5 is connected to the first fixing plate 6, and the second dust sealing cover 8 and the first dust sealing cover 5 are different in that: the left end of the second dust seal cover 8 is closed and used for protecting the left end of the guide rod 3, and when the left end of the guide rod 3 extends out, the left end of the second dust seal cover 8 can be directly pushed to be stretched and deformed.

To sum up, the sealed dust keeper of telescopic link in this embodiment guarantees the sealed service environment of piston rod 2 and guide arm 3 through first sealed dust cover 5 and the sealed dust cover 8 of second, and when the installation, only need to fix the fixed plate on cylinder body or push pedal, when carrying out the connection of sealed dust cover, only need guarantee that the snap ring installs the tip at sealed dust cover, then produce elastic deformation through making the snap ring, utilize on the lock seat first puller bolt and the second puller bolt both ends of fixing the snap ring can, it is more convenient to connect, can improve the installation effectiveness.

In other embodiments of the piston cylinder, when the piston rod is the cylinder, the cylinder can be the cylinder without the guide rod, and at the moment, only the sealing dust cover needs to be sleeved outside the piston rod.

In other embodiments of the piston cylinder, the piston cylinder may also be a hydraulic cylinder.

In other embodiments of the piston cylinder, the flange does not include an extension wall and is only composed of a vertical wall, and an arc-shaped groove for sleeving and fixing the end part of the sealing dust cover can be machined on the outer peripheral surface of the vertical wall, or the end part of the sealing dust cover is directly sleeved and fixed outside the vertical wall.

In other embodiments of the piston cylinder, only one convex framework is arranged, and the convex framework is not arranged.

In other embodiments of the piston cylinder, the outer convex framework and the inner convex framework are not arranged, and the two ends of the sealing dust cover are directly provided with the ultra-rebound film to deform.

In other embodiments of the piston cylinder, the sealing boot is not an elastic membrane boot, but is made of a flexible material that does not elastically deform.

In other embodiments of the piston cylinder, instead of the first tightening bolt and the second tightening bolt, only one larger tightening screw may be provided, and the tightening screw may press both ends of the snap ring at the same time, and only one large threaded hole may be provided in the lock base.

In other embodiments of the piston cylinder, the outer peripheries of the two ends of the elastic snap ring may not be provided with pressing planes, and the first pressing bolt and the second pressing bolt or the pressing screw directly press the outer periphery of the elastic snap ring.

In other embodiments of the piston cylinder, the bore is not a through hole, but a blind hole, in which case two bores need to be provided.

In other embodiments of the piston cylinder, the number of the mounting grooves can be one.

In other embodiments of the piston cylinder, the mounting slot may not be sized to mate with the lock receptacle, but rather may be sized larger than the lock receptacle; the structure of mounting groove also can not match with the lock seat, as long as can put into the mounting groove with the lock seat can.

In other embodiments of the piston cylinder, the annular cavity may not be provided in the annular rib, and the annular rib is not required to be provided with the mounting groove, but an arc-shaped groove for fixing the elastic clamp ring is provided on the outer peripheral surface of the annular rib, or the arc-shaped groove is not provided, the elastic clamp ring is directly sleeved on the super-rebound film on the inner side of the annular rib, or the end of the sealed dust cover is not provided with the annular rib, and the elastic clamp ring is directly sleeved on the end of the super-rebound film.

The embodiment 1 of the telescopic rod sealing dustproof device for the piston cylinder is as follows: the specific structure of the telescopic rod sealing dustproof device of the piston cylinder is the same as the related structure of the first sealing dustproof cover of the telescopic rod sealing dustproof device in the embodiment of the piston cylinder, and the detailed description is omitted here.

The embodiment 2 of the telescopic rod sealing dustproof device for the piston cylinder is as follows: the specific structure of the telescopic rod sealing dustproof device of the piston cylinder is the same as the related structure of the second sealing dustproof cover of the telescopic rod sealing dustproof device in the embodiment of the piston cylinder, and the detailed description is omitted here.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.