Belt pulley sealing tensioning wheel for engine

Abstract

The utility model relates to the technical field of automobile engines, in particular to a belt pulley sealing tensioning wheel for an engine, which comprises a tensioning arm and a sealing cover body, and a belt pulley is rotatably mounted on the tensioning arm; and the dismounting and mounting assembly comprises a threaded mounting hole formed in the tensioning arm, a locking screw rod is in threaded connection with the interior of the threaded mounting hole, one end of the locking screw rod is fixedly connected with an adapter shaft body, and a bearing is fixedly connected to the peripheral wall of the adapter shaft body. Efficient disassembly and assembly operation of the tensioning wheel can be conveniently achieved, the maintenance or replacement use efficiency of the tensioning wheel can be improved, the sealing cover body supports disassembly so that the interior of the tensioning wheel can be cleaned and maintained, the arranged sealing cover body can carry out waterproof and dustproof protection on the bearing, and the service life of the tensioning wheel is prolonged. And the rotation stability of the tensioning wheel and the tensioning effect on the belt are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile engine, concretely relates to a sealing tension pulley for engine pulley. BACKGROUND

[0002] The engine pulley tension pulley is an important component of the engine valve train system, which is usually composed of a wheel body, bearings and a central shaft, the wheel body contacts with the belt, and the bearings and the central shaft ensure smooth rotation, during the rotation of the engine pulley, the tension pulley can automatically adjust the tightness of the belt to ensure that the belt is always in a proper tension state, prevent the belt from slipping, ensure the effective transmission of power between the engine components, and ensure the stability and reliability of the engine.

[0003] The prior art has the following problems when in use:

[0004] The engine pulley tension pulley does not support disassembly or the disassembly process is relatively complicated, which is inconvenient when maintaining or replacing the tension pulley, resulting in low efficiency of maintaining or replacing the tension pulley; in addition, there are a lot of dust, oil stains and water vapor and other impurities in the working environment of the engine, which easily invade the inside of the tension pulley, causing wear of the bearings and other key components, reducing the rotation stability of the tension pulley, and further affecting the tensioning effect of the tension pulley on the belt. UTILITY MODEL CONTENTS

[0005] In view of the above shortcomings of the prior art, the utility model provides a sealing tension pulley for engine pulley, which can effectively solve the problems of the engine pulley tension pulley in the prior art, which is inconvenient to maintain or replace, resulting in low efficiency of maintaining or replacing the tension pulley, and impurities in the working environment of the engine easily invade the inside of the tension pulley, affecting the rotation stability of the tension pulley and the tensioning effect on the belt.

[0006] To achieve the above purpose, the utility model realizes the following technical scheme:

[0007] The utility model provides a sealing tension pulley for engine pulley, which comprises:

[0008] The tensioning arm and the sealing cover body, the pulley is rotatably installed on the tensioning arm;

[0009] The disassembly assembly comprises a threaded mounting hole opened on the tensioning arm, the threaded mounting hole is threadedly connected with a locking screw, one end of the locking screw is fixedly connected with an adapter shaft body, the outer peripheral wall of the adapter shaft body is fixedly connected with a bearing, and the outer ring of the bearing is fixedly connected with the tension pulley;

[0010] The sealing protection assembly is arranged on the axial side wall of the tensioning wheel and is used for sealing and protecting the inside of the tensioning wheel and the bearing.

[0011] Further, the dismounting assembly further comprises a protective threaded sleeve fixedly connected to the outer wall of the tensioning arm, an inner thread is arranged on the inner wall of the protective threaded sleeve, and the locking screw is threadedly connected with the inner thread.

[0012] Further, the adapter shaft body is fixedly connected with a dismounting cap at the end away from the tensioning arm, and a hexagonal groove is arranged on the outer wall of the dismounting cap.

[0013] Further, the sealing protection assembly comprises an annular sealing groove arranged on the axial side wall of the tensioning wheel, the cross section of the annular sealing groove is arranged in a convex structure, a threaded sleeve ring is fixedly connected to the sealing cover body, an inner thread is arranged on the inner side of the annular sealing groove, and the threaded sleeve ring is threadedly connected with the inner thread.

[0014] Further, the sealing protection assembly further comprises two metal sealing sheets fixedly connected to the outer peripheral wall and the inner peripheral wall of the sealing cover body, and the two metal sealing sheets are in interference fit with the inner wall of the annular sealing groove.

[0015] Further, a polygonal knob is fixedly connected to the outer peripheral wall of the sealing cover body.

[0016] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

[0017] In the utility model, the installation and dismounting operation of the tensioning wheel and the tensioning arm can be quickly completed through the thread cooperation between the locking screw and the threaded mounting hole on the tensioning arm, so that the efficient dismounting operation of the tensioning wheel is realized, the maintenance or replacement efficiency of the tensioning wheel is improved, the connecting part of the locking screw and the tensioning arm can be protected and limited by the protective threaded sleeve, and the connecting and installation stability of the tensioning wheel and the tensioning arm is ensured.

[0018] In the utility model, the installation and dismounting operation of the sealing cover body and the tensioning wheel can be quickly completed through the thread cooperation between the threaded sleeve ring on the sealing cover body and the inner thread in the annular sealing groove, on the one hand, the sealing cover body can be supported and dismounted to clean and maintain the inside of the tensioning wheel, and on the other hand, the sealing cover body can protect the bearing from water and dust, the metal sealing sheets can provide additional sealing protection for the connecting part of the tensioning wheel and the sealing cover body, the bearing part in the tensioning wheel is always in a clean running environment, and therefore the rotation stability of the tensioning wheel and the tensioning effect on the belt can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings described in the following are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 It is a three-dimensional structure schematic diagram of the present application;

[0021] Figure 2 It is an exploded view of the tensioning arm part structure in the present application;

[0022] Figure 3 It is an exploded view of the disassembly and assembly component part structure in the present application;

[0023] Figure 4 It is a schematic diagram of the sealing cover part structure in the present application;

[0024] Figure 5 It is a sectional view of the tensioning wheel part structure in the present application;

[0025] Reference signs: 1, tensioning arm; 2, sealing cover; 3, pulley; 4, threaded mounting hole; 5, locking screw; 6, adapter shaft body; 7, bearing; 8, tensioning wheel; 9, protective threaded sleeve; 10, No. 1 internal thread; 11, disassembly and assembly cap; 12, annular sealing groove; 13, threaded sleeve ring; 14, No. 2 internal thread; 15, metal sealing sheet; 16, polygonal knob. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] The present application will be further described below in combination with the embodiments.

[0028] Embodiment: refer to Figures 1 to 5A kind of sealing tensioner for engine pulley, including: tensioning arm 1, sealing cover 2 and dismounting assembly, sealing cover 2 outer wall is fixedly connected with polygonal knob 16, pulley 3 is rotatably installed on tensioning arm 1;Dismounting assembly includes the threaded mounting hole 4 opened on tensioning arm 1, threaded mounting hole 4 is threadedly connected with locking screw 5, one end of locking screw 5 is fixedly connected with adapter shaft body 6, the end of adapter shaft body 6 away from tensioning arm 1 is fixedly connected with dismounting cap 11, hexagonal recess is opened in the outer wall of dismounting cap 11, the outer wall of adapter shaft body 6 is fixedly connected with bearing 7, the outer ring of bearing 7 is fixedly connected with tensioner 8, dismounting assembly further includes the protective threaded sleeve 9 fixedly connected to the outer wall of tensioning arm 1, the inner thread 10 is arranged in the inner wall of protective threaded sleeve 9, locking screw 5 is threadedly engaged with the inner thread 10;

[0029] By the thread engagement of locking screw 5 and threaded mounting hole 4 on tensioning arm 1, the installation and disassembly operation of tensioner 8 and tensioning arm 1 can be quickly completed, so as to realize the efficient disassembly operation of tensioner 8, which is beneficial to improve the maintenance or replacement efficiency of tensioner 8, and the protective threaded sleeve 9 can protect and limit the connecting part of locking screw 5 and tensioning arm 1, to ensure the connecting and installation stability of tensioner 8 and tensioning arm 1.

[0030] Referring to Figure 1 、 Figures 3 to 5 The axial side wall of tensioner 8 is provided with a sealing protection assembly, which is used for sealing and protecting the inside of tensioner 8 and bearing 7, and the sealing protection assembly comprises an annular sealing groove 12 opened in the axial side wall of tensioner 8, the cross section of annular sealing groove 12 is arranged in convex structure, a threaded sleeve ring 13 is fixedly connected to sealing cover 2, a second inner thread 14 is arranged in the inner side of annular sealing groove 12, the threaded sleeve ring 13 is threadedly engaged with the second inner thread 14, and the sealing protection assembly further comprises two metal sealing sheets 15 fixedly connected to the outer wall and inner wall of sealing cover 2, and the two metal sealing sheets 15 are all in interference fit with the inner wall of annular sealing groove 12.

[0031] By the thread engagement of threaded sleeve ring 13 on sealing cover 2 and second inner thread 14 in annular sealing groove 12, the installation and disassembly operation of sealing cover 2 and tensioner 8 can be quickly completed, since sealing cover 2 can be disassembled, the inside of tensioner 8 can be conveniently cleaned and maintained, and sealing cover 2 can protect bearing 7 from water and dust, and metal sealing sheet 15 can provide additional sealing protection for the connecting part of tensioner 8 and sealing cover 2, so as to ensure that bearing 7 in the inside of tensioner 8 is always in a clean running environment, thereby ensuring the rotation stability of tensioner 8 and the tensioning effect on the belt.

[0032] The working principle of the utility model is as follows:

[0033] 1、In use, by using a hex wrench or the like to screw the adapter shaft body 6 and the locking screw 5, through the screw thread cooperation of the locking screw 5 and the threaded mounting hole 4 on the tensioning arm 1, the installation and dismounting operation of the tensioning wheel 8 and the tensioning arm 1 can be quickly completed, so as to realize the efficient dismounting operation of the tensioning wheel 8, which is conducive to improving the maintenance or replacement efficiency of the tensioning wheel 8, the protective threaded sleeve 9 can protect and limit the connecting part of the locking screw 5 and the tensioning arm 1, and ensure the connecting and mounting stability of the tensioning wheel 8 and the tensioning arm 1;

[0034] 2、By rotating the polygonal knob 16 to drive the sealing cover body 2 to rotate, the threaded sleeve ring 13 on the sealing cover body 2 and the second internal thread 14 in the annular sealing groove 12 can be quickly installed and dismounted, and since the sealing cover body 2 can be supported and dismounted, the inside of the tensioning wheel 8 can be conveniently cleaned and maintained, and the sealing cover body 2 can protect the bearing 7 from water and dust, the metal sealing sheet 15 can provide additional sealing protection for the connecting part of the tensioning wheel 8 and the sealing cover body 2, so as to ensure that the bearing 7 inside the tensioning wheel 8 is always in a clean running environment, thereby ensuring the rotation stability of the tensioning wheel 8 and the tensioning effect on the belt.

[0035] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A belt pulley seal tensioner for an engine, characterized in that, include: Tensioning arm (1) and sealing cover (2), wherein a pulley (3) is rotatably mounted on the tensioning arm (1); The assembly includes a threaded mounting hole (4) on the tension arm (1), a locking screw (5) is threadedly connected to the threaded mounting hole (4), a converter shaft (6) is fixedly connected to one end of the locking screw (5), a bearing (7) is fixedly connected to the outer peripheral wall of the converter shaft (6), and a tensioning wheel (8) is fixedly connected to the outer ring of the bearing (7). The tensioning wheel (8) has a sealing and protection component on its axial sidewall, which is used to seal and protect the interior of the tensioning wheel (8) and the bearing (7).

2. The engine pulley seal tensioner according to claim 1, characterized in that, The assembly and disassembly assembly also includes a protective threaded sleeve (9) fixedly connected to the outer wall of the tensioning arm (1). The inner wall of the protective threaded sleeve (9) is provided with an internal thread (10), and the locking screw (5) is threadedly engaged with the internal thread (10).

3. The engine pulley seal tensioner according to claim 1, characterized in that, The adapter shaft (6) is fixedly connected to a disassembly cap (11) at the end away from the tensioning arm (1), and the outer wall of the disassembly cap (11) is provided with a hexagonal groove.

4. The engine pulley seal tensioner according to claim 1, characterized in that, The sealing and protective assembly includes an annular sealing groove (12) opened on the axial side wall of the tensioning wheel (8). The annular sealing groove (12) has a convex cross-section. A threaded collar (13) is fixedly connected to the sealing cover (2). A second internal thread (14) is provided inside the annular sealing groove (12). The threaded collar (13) is threadedly engaged with the second internal thread (14).

5. The engine pulley seal tensioner according to claim 4, characterized in that, The sealing and protective assembly also includes two metal sealing pieces (15) fixedly connected to the outer and inner peripheral walls of the sealing cover (2), and both metal sealing pieces (15) are interference-fitted with the inner wall of the annular sealing groove (12).

6. The engine pulley seal tensioner according to claim 1, characterized in that, A polygonal knob (16) is fixedly connected to the outer peripheral wall of the sealing cover (2).

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