Timing toothed belt guide wheel

Abstract

The utility model discloses a timing toothed belt guide wheel, including a bearing, a gear, a retaining ring, a bolt and a bushing; the bearing is arranged in the annular inner cavity of the gear, the bushing is arranged on the rear side of the bearing, and a rigid ring and a rubber sealing ring are arranged on the bearing; the bolt is arranged on the front side of the bearing, the tail end of the bolt passes through the bearing and the bushing, and an O-ring is arranged at the connection between the rear end of the bushing and the bolt, and the O-ring is sleeved on the bolt; the retaining ring is arranged on the gear on the rear side of the bearing, and the inner ring of the retaining ring is sleeved on the bushing. A double sealing structure is arranged on the bearing, so that it can prevent external impurities from entering the inside of the bearing through the rigid ring and the rubber sealing ring, thereby extending the service life of the product; the annular array tooth groove of the gear cooperates with the timing belt to ensure the stable operation of the timing belt, and provide precise transmission, improve transmission efficiency and transmission accuracy, reduce operating noise, and thus achieve normal operation of the engine.

Description

Technical Field

[0001] The utility model relates to the technical field of timing toothed belt guide wheels, in particular to a timing toothed belt guide wheel. Background Art

[0002] The belt drive used in the engine is a kind of mechanical transmission that uses a flexible belt stretched on a pulley to transmit motion or power. Since it is a meshing transmission, there is no relative slip between the belt and the pulley, so that the transmission between the master and slave wheels is synchronized. Compared with other V-belts and flat belts, the synchronous belt drive has the following advantages: high transmission efficiency, no slip, and can achieve the purpose of synchronous transmission; a large speed ratio range, allowing high linear speed; a large transmission power range, from tens of watts to hundreds of kilowatts; a compact structure, and is also suitable for multi-axis transmission. It is widely used in automobiles, office equipment, textile machinery, precision machine tools and other transmissions with high transmission accuracy and compact structure.

[0003] The main disadvantage of the existing timing toothed belt drive is that the manufacturing accuracy and material life requirements of the toothed belt pulley and the belt are high. If the required manufacturing accuracy and life are not met, the transmission efficiency of the belt drive will be reduced, the energy loss will be large, and the life will be short. The accuracy and stability of the engine timing system are extremely difficult to guarantee, and the operating noise is also loud, which needs to be improved. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, in order to solve the above technical problems, the utility model provides the following technical solutions: a timing toothed belt guide wheel, comprising a bearing, a gear, a retaining ring, a bolt and a bushing;

[0006] The bearing is arranged in the annular inner cavity of the gear, the bushing is arranged on the rear side of the bearing, and a rigid ring and a rubber sealing ring are arranged on the bearing; the bolt is arranged on the front side of the bearing, the tail end of the bolt passes through the bearing and the bushing, an O-ring is arranged at the connection between the rear end of the bushing and the bolt, and the O-ring is sleeved on the bolt; the retaining ring is arranged on the gear on the rear side of the bearing, and the inner ring of the retaining ring is sleeved on the bushing.

[0007] As a preferred solution of the timing toothed belt guide wheel of the utility model, the bearing is a deep groove ball bearing, the bearing includes a retaining frame, an inner ring, an outer ring and steel balls, the steel balls are arranged on the retaining frame, and the inner ring and the outer ring are respectively arranged on the inner and outer sides of the steel balls.

[0008] As a preferred solution of the timing toothed belt guide wheel of the utility model, the rigid ring and the rubber sealing ring are arranged in the cavity between the inner ring and the outer ring, and the rubber sealing ring is nested on the rigid ring.

[0009] As a preferred solution of the timing toothed belt guide wheel of the utility model, the upper and lower ends of the rubber sealing ring are arranged with sealing protrusions, and anti-slip grooves are opened on the sealing protrusions. The rubber sealing ring is sealed and nested on the inner ring and outer ring of the bearing through the sealing protrusions and the anti-slip grooves.

[0010] As a preferred solution of the timing toothed belt guide wheel of the utility model, wherein: a ring array of tooth grooves are opened on the circumferential outer wall of the gear, and the tooth grooves are used in conjunction with the timing belt to ensure stable operation of the timing belt.

[0011] As a preferred solution of the timing toothed belt guide wheel of the utility model, a groove for cooperating with a snap ring is opened on the inner ring cavity of the gear, the outer ring of the snap ring is snapped into the groove, and the snap ring is located on the rear side of the bearing.

[0012] As a preferred solution of the timing toothed belt guide wheel of the utility model, the bushing includes an integrated plug-in front sleeve, a tapered sleeve and a connecting tail sleeve, the plug-in front sleeve is plugged into the inner cavity of the bearing inner ring, and the tapered sleeve is arranged between the plug-in front sleeve and the connecting tail sleeve.

[0013] As a preferred solution of the timing toothed belt guide wheel of the utility model, the connection between the tapered sleeve and the plug-in front sleeve is in an "L" shape, the front end wall of the tapered sleeve fits with the rear end wall of the inner ring of the bearing, and the sloped circumferential side wall of the tapered sleeve fits with the retaining ring.

[0014] Beneficial effects of the utility model:

[0015] 1. A timing toothed belt guide wheel proposed in the utility model is provided with a bearing, which is located in the annular inner cavity of the gear to ensure the stable rotation of the guide wheel. A double sealing structure is arranged on the bearing, so that it can prevent external impurities (dust, moisture and other impurities) from entering the bearing through a rigid ring and a rubber sealing ring, protect the bearing from contamination and damage, and protect the normal operation of the bearing components. The design and sealing structure of the bearing can increase the wear resistance and stability of the bearing and extend the service life of the product.

[0016] 2. The utility model proposes a timing toothed belt guide wheel. The design of the bushing in the product can provide additional support and fixation for the bearing, thereby enhancing the stability and durability of the bearing. The installation of the bolts ensures the installation accuracy of the bearing, bushing and gear, so that they can maintain a good relative position during operation, which is crucial to the accuracy and stability of the engine timing system and can ensure the timing performance of the engine.

[0017] 3. A timing toothed belt guide wheel proposed in the utility model, the annular array tooth grooves of the gear cooperate with the timing belt to ensure the stable operation of the timing belt, and provide precise transmission, improve the transmission efficiency and transmission accuracy. By using the timing toothed belt guide wheel, the maintenance cost of the equipment is reduced, the reliability and stability of the equipment are improved, the operating noise is reduced, the stable operation of the timing belt is ensured, and the intake valve and exhaust valve of the engine are guaranteed to be opened or closed at the appropriate time, thereby realizing the normal operation of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the exploded structure of parts of the utility model.

[0021] Figure 3 It is a cross-sectional structural schematic diagram of the utility model.

[0022] Figure 4 It is a structural schematic diagram of the clamping ring of the utility model.

[0023] Figure 5 It is a structural schematic diagram of the rubber sealing ring of the utility model.

[0024] In the figure: 100, bearing; 101, cage; 102, inner ring; 103, outer ring; 104, steel ball; 105, rigid ring; 106, rubber sealing ring; 1061, sealing protrusion; 1062, anti-slip groove;

[0025] 200, gear;

[0026] 300, snap ring;

[0027] 400, bolt; 401, O-ring;

[0028] 500, bushing; 501, plug-in front sleeve; 502, tapered sleeve; 503, connecting tail sleeve. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] Example 1

[0034] Reference Figures 1 to 5 , which is the first embodiment of the utility model, provides a timing toothed belt guide wheel, including a bearing 100, a gear 200, a retaining ring 300, a bolt 400 and a bushing 500;

[0035] The bearing 100 is arranged in the annular inner cavity of the gear 200. The bearing 100 is a deep groove ball bearing. The bearing 100 includes a retainer 101, an inner ring 102, an outer ring 103 and a steel ball 104. The steel ball 104 is arranged on the retainer 101. The inner ring 102 and the outer ring 103 are arranged on the inner and outer sides of the steel ball 104 respectively. A rigid ring 105 and a rubber sealing ring 106 are arranged on the bearing 100. The rigid ring 105 and the rubber sealing ring 106 are arranged in the cavity between the inner ring 102 and the outer ring 103. The rubber sealing ring 106 is nested on the rigid ring 105. The upper and lower ends of the rubber sealing ring 106 are both arranged with sealing protrusions 1061. The sealing protrusion 1061 is provided with an anti-slip groove 1062. The rubber sealing ring 106 is sealed and nested on the inner ring 102 and the outer ring 103 of the bearing 100 through the sealing protrusion 1061 and the anti-slip groove 1062.

[0036] The gear 200 has a circular array of tooth grooves on its outer circumferential wall, which cooperate with the timing belt to ensure stable operation of the timing belt; the gear 200 has a retaining groove on its inner ring cavity for use with a retaining ring 300, and the outer ring of the retaining ring 300 is clamped in the retaining groove, and the retaining ring 300 is located on the rear side of the bearing 100.

[0037] The bolt 400 is arranged on the front side of the bearing 100, and the tail end of the bolt 400 passes through the bearing 100 and the bushing 500. An O-ring 401 is arranged at the connection between the rear end of the bushing 500 and the bolt 400, and the O-ring 401 is sleeved on the bolt 400; the retaining ring 300 is arranged on the gear 200 on the rear side of the bearing 100, and the inner ring of the retaining ring 300 is sleeved on the bushing 500.

[0038] The bushing 500 is arranged on the rear side of the bearing 100, and the bushing 500 includes an integrated plug-in front sleeve 501, a tapered sleeve 502 and a connecting tail sleeve 503. The plug-in front sleeve 501 is plugged into the inner cavity of the inner ring of the bearing 100, and the tapered sleeve 502 is arranged between the plug-in front sleeve 501 and the connecting tail sleeve 503; the connection between the tapered sleeve 502 and the plug-in front sleeve 501 is in an "L" shape, the front end wall of the tapered sleeve 502 is in contact with the rear end wall of the inner ring 102 of the bearing 100, and the sloped circumferential side wall of the tapered sleeve 502 is in contact with the retaining ring 300.

[0039] In this embodiment: a double-sided sealed deep groove bearing is arranged in the product, and the bearing 100 is located in the annular inner cavity of the gear 200 to ensure the stable rotation of the guide wheel. The double sealing structure arranged on the bearing 100 can prevent external impurities (dust, moisture and other impurities) from entering the interior of the bearing 100 through the rigid ring 105 and the rubber sealing ring 106, protect the bearing 100 from pollution and damage, and protect the normal operation of the bearing 100 parts. The design and sealing structure of the above-mentioned bearing 100 can increase the wear resistance and stability of the bearing 100 and extend the service life of the product; the design of the bushing 500 in the product can provide additional support for the bearing 100 by plugging in the front sleeve 501, and can achieve the front end wall of the tapered sleeve 502 against the rear side of the bearing 100. The auxiliary fixation of the bearing 100 enhances the stability and durability of the bearing 100; the installation of the bolt 400 ensures the installation accuracy of the bearing 100, the bushing 500 and the gear 200, so that they can maintain a good relative position during operation, which is crucial to the accuracy and stability of the engine timing system and can ensure the timing performance of the engine; the annular array of teeth of the gear 200 cooperates with the timing belt to ensure the stable operation of the timing belt and provide precise transmission, improve transmission efficiency and transmission accuracy, and reduce the maintenance cost of the equipment, improve the reliability and stability of the equipment, ensure the stable operation of the timing belt, and ensure that the intake valve and exhaust valve of the engine are opened or closed at the appropriate time, thereby achieving normal operation of the engine.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A timing toothed belt guide wheel, characterized in that: It comprises a bearing (100), a gear (200), a snap ring (300), a bolt (400) and a bushing (500); The bearing (100) is arranged in the annular inner cavity of the gear (200), the bushing (500) is arranged on the rear side of the bearing (100), and a rigid ring (105) and a rubber sealing ring (106) are arranged on the bearing (100); the bolt (400) is arranged on the front side of the bearing (100), the rear end of the bolt (400) passes through the bearing (100) and the bushing (500), an O-ring (401) is arranged at the connection between the rear end of the bushing (500) and the bolt (400), and the O-ring (401) is sleeved on the bolt (400); the retaining ring (300) is arranged on the gear (200) on the rear side of the bearing (100), and the inner ring of the retaining ring (300) is sleeved on the bushing (500).

2. The timing belt guide pulley according to claim 1, characterized in that: The bearing (100) is a deep groove ball bearing, comprising a retaining frame (101), an inner ring (102), an outer ring (103) and a steel ball (104), wherein the steel ball (104) is arranged on the retaining frame (101), and the inner ring (102) and the outer ring (103) are arranged on the inner and outer sides of the steel ball (104), respectively.

3. The timing belt guide pulley according to claim 1, characterized in that: The rigid ring (105) and the rubber sealing ring (106) are arranged in a cavity between the inner ring (102) and the outer ring (103), and the rubber sealing ring (106) is nested on the rigid ring (105).

4. The timing toothed belt guide pulley according to claim 1, characterized in that: The upper and lower ends of the rubber sealing ring (106) are both provided with sealing protrusions (1061), and an anti-slip groove (1062) is provided on the sealing protrusion (1061). The rubber sealing ring (106) is sealed and nested on the inner ring (102) and the outer ring (103) of the bearing (100) through the sealing protrusion (1061) and the anti-slip groove (1062).

5. The timing belt guide pulley according to claim 1, characterized in that: The outer circumferential wall of the gear (200) is provided with tooth grooves in an annular array, and the tooth grooves cooperate with the timing belt to ensure stable operation of the timing belt.

6. The timing belt guide pulley according to claim 1, characterized in that: The inner ring cavity of the gear (200) is provided with a clamping groove for use with a clamping ring (300), the outer ring of the clamping ring (300) is clamped in the clamping groove, and the clamping ring (300) is located at the rear side of the bearing (100).

7. The timing belt guide pulley according to claim 1, characterized in that: The bushing (500) comprises an integrated plug-in front sleeve (501), a tapered sleeve (502) and a connecting tail sleeve (503); the plug-in front sleeve (501) is plugged into the inner cavity of the inner ring of the bearing (100); and the tapered sleeve (502) is arranged between the plug-in front sleeve (501) and the connecting tail sleeve (503).

8. The timing belt guide pulley according to claim 7, characterized in that: The connection between the tapered sleeve (502) and the plug-in front sleeve (501) is in an "L"-shaped structure, the front end wall of the tapered sleeve (502) is in abutment with the rear end wall of the inner ring (102) of the bearing (100), and the sloped circumferential side wall of the tapered sleeve (502) is in abutment with the retaining ring (300).

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