Pulley with good bearing sealing performance for sports equipment

Abstract

The utility model relates to the technical field of pulleys, in particular to a pulley for sports equipment with good bearing sealing performance, which comprises a pulley main body, a bearing mounting hole and an outer side sealing groove are arranged on the pulley main body, a bearing is fixedly arranged in the bearing mounting hole, a bearing mounting hole is arranged on the bearing, and an equipment main shaft is fixedly sleeved in the bearing mounting hole. An external thread and a grab handle sleeve are arranged on the equipment main shaft, a sealing side cover is arranged on the equipment main shaft in a sleeving manner, an inner side sealing ring and an outer side sealing ring are arranged on the sealing side cover, a transverse insertion hole is formed in the sealing side cover, an internal thread is arranged in the transverse insertion hole, and a finger catching groove is formed in the sealing side cover. The installation parts of the pulley main body and the bearing are symmetrically sealed and effectively and comprehensively covered, the convenience of threaded installation, sealing and covering of the sealing side cover is improved, and the smoothness of sleeving the sealing side cover on an equipment main shaft through the transverse insertion hole is improved.

Description

Technical Field

[0001] This utility model relates to the field of pulley technology, and in particular to a pulley for sports equipment with good bearing sealing performance. Background Technology

[0002] Pulleys are frequently used in sports equipment, such as roller skates, skateboards, fitness equipment, and treadmills. Most sports equipment is quite large and takes up a lot of space if placed indoors at home. Therefore, a small-sized pulley-type sports and fitness equipment for targeting the waist and abdominal muscles has emerged.

[0003] Small pulley-type exercise equipment for targeting waist and abdominal strength generally consists of a pulley body, bearings, main shaft, and grip sleeves. People hold the grip sleeves on both sides, then lie face down on the ground with a gap between their body and the ground, and then use their own waist and abdominal strength to repeatedly contract their abdomen. At the same time, the pulley body will also roll on the ground, thus achieving the exercise of waist and abdominal strength.

[0004] Currently, existing small-volume pulley-type fitness equipment for targeting waist and abdominal strength has weak sealing at the installation points of the pulley body and bearings. Over time, dust particles from the external environment can easily enter the pulley body and bearings, which will greatly reduce the service life of the pulley body and bearings in small-volume pulley-type fitness equipment for targeting waist and abdominal strength. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned shortcomings in the existing technology by proposing a pulley for sports equipment with good bearing sealing performance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a pulley for sports equipment with good bearing sealing performance, including a pulley body, a bearing mounting hole and an outer sealing groove on the pulley body, a bearing fixedly installed in the bearing mounting hole, a bearing mounting hole on the bearing, a sports equipment spindle fixedly sleeved in the bearing mounting hole, the sports equipment spindle is provided with external threads and a handle sleeve, a sealing side cover is sleeved on the sports equipment spindle, the sealing side cover is provided with an inner sealing ring and an outer sealing ring, and a horizontal insertion hole is provided on the sealing side cover, the horizontal insertion hole is provided with internal threads;

[0008] The sealing side cover is provided with a finger buckle groove, and an elastic damping layer is provided in the finger buckle groove;

[0009] The main shaft of the device is provided with an arc chamfer, and the outer sealing groove is provided with a smooth layer.

[0010] Furthermore, the main shaft of the equipment is horizontally fixedly inserted into the bearing mounting hole, and the bearing is embedded and fixedly installed in the bearing mounting hole.

[0011] Furthermore, the outer sealing ring is extruded and inserted into the outer sealing groove, and the inner sealing ring is extruded and sleeved on the external thread.

[0012] Furthermore, the sealing side cover is connected by internal and external threads, and there are two sealing side covers that are symmetrical from left to right.

[0013] Furthermore, the chamfer is provided at both ends of the instrument spindle, and the grip sleeve is fixedly sleeved on the outer wall of the instrument spindle. The outer diameter of the grip sleeve is not greater than the inner diameter of the transverse insertion hole.

[0014] Furthermore, the finger buckle groove is a semi-arc inner groove structure with twelve grooves arranged in a circle, and the elastic damping layer is evenly laid along the inner groove wall of the finger buckle groove.

[0015] Furthermore, the smooth layer is uniformly coated along the inner wall of the outer sealing groove.

[0016] The present invention provides a pulley for sports equipment with good bearing sealing performance, which has the following advantages:

[0017] 1. This utility model, by opening an outer sealing groove on the pulley body and symmetrically fitting a sealing side cover structure with an inner sealing ring and an outer sealing ring on the main shaft of the equipment, and simultaneously setting an internal and external threaded installation structure, achieves stable threaded installation of the two sealing side covers, thereby achieving symmetrical sealing and effective and comprehensive coverage of the installation parts of the pulley body and bearings, preventing dust particles from the external environment from directly entering the pulley body and bearings, and thus improving the service life of the pulley body and bearings in small-volume pulley-type sports and fitness equipment for waist and abdominal strength.

[0018] 2. This utility model, by setting a finger groove structure with an elastic damping layer on the outer wall of the sealing side cover, enables convenient manual rotation of the sealing side cover and symmetrical sealing of the installation parts of the pulley body and bearing, further improving the convenience of threaded installation and sealing of the sealing side cover.

[0019] 3. This utility model greatly improves the smoothness of the sealing side cover being fitted onto the equipment spindle through the horizontal insertion hole by setting an arc chamfer structure at both ends of the equipment spindle. Attached Figure Description

[0020] Figure 1 This is an exploded three-dimensional schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a three-dimensional schematic diagram of the overall structure of this utility model in its installation state;

[0022] Figure 3 For the present utility model Figure 1 A three-dimensional schematic diagram of the main structure of the pulley with an outer sealing groove;

[0023] Figure 4 For the present utility model Figure 1 A three-dimensional schematic diagram of the central sealing side cover;

[0024] Figure 5 For the present utility model Figure 1 A three-dimensional schematic diagram of the main shaft of the equipment.

[0025] In the diagram: 1. Pulley body; 11. Bearing mounting hole; 2. Outer sealing groove; 21. Smooth layer; 3. Bearing; 31. Bearing mounting hole; 4. Equipment spindle; 41. External thread; 42. Chamfer; 5. Handle sleeve; 6. Sealing side cover; 61. Inner sealing ring; 62. Outer sealing ring; 7. Horizontal insertion hole; 71. Internal thread; 8. Finger groove; 81. Elastic damping layer. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Reference Figure 1-5 A sports equipment pulley with good bearing sealing performance includes a pulley body 1. The pulley body 1 has a bearing mounting hole 11 and an outer sealing groove 2. A bearing 3 is fixedly installed in the bearing mounting hole 11. The bearing 3 has a bearing mounting hole 31. The equipment spindle 4 is fixedly sleeved in the bearing mounting hole 31. The equipment spindle 4 is provided with an external thread 41 and a handle sleeve 5. The equipment spindle 4 is sleeved with a sealing side cover 6. The sealing side cover 6 is provided with an inner sealing ring 61 and an outer sealing ring 62. The sealing side cover 6 has a horizontal insertion hole 7. The horizontal insertion hole 7 is provided with an internal thread 71.

[0028] The sealing side cover 6 is provided with a finger buckle groove 8, and an elastic damping layer 81 is provided in the finger buckle groove 8;

[0029] The main shaft 4 of the instrument is provided with an arc chamfer 42, and a smooth layer 21 is provided in the outer sealing groove 2.

[0030] The main shaft 4 of the equipment is horizontally fixed and inserted into the bearing mounting hole 31. The bearing 3 is embedded and fixed in the bearing mounting hole 11. The bearing 3 adopts the commonly used ball bearing. The overall installation is the prior art. Some of the structures described in this patent are commonly used structures for small-volume pulley-type exercise and fitness equipment for waist and abdominal strength. They are the prior art, and the specific use and operation have been described in the background art. Some existing structures are not drawn and labeled, so there is no need to elaborate.

[0031] The outer sealing ring 62 is squeezed and inserted into the outer sealing groove 2, and the inner sealing ring 61 is squeezed and sleeved on the external thread 41. Both the outer sealing ring 62 and the inner sealing ring 61 are made of vulcanized rubber, which has high elasticity and extrusion sealing properties and is durable.

[0032] The sealing side cover 6 is connected to the external thread 41 by the internal thread 71. There are two sealing side covers 6 that are symmetrical on the left and right. The body of the sealing side cover 6 is made of aluminum alloy, which is impact-resistant, corrosion-resistant and durable.

[0033] The chamfered corner 42 is set at both ends of the instrument spindle 4, which improves the smoothness of the sealing side cover 6 being fitted onto the instrument spindle 4 through the transverse insertion hole 7.

[0034] The grip sleeve 5 is fixedly sleeved on the outer wall of the main shaft 4 of the equipment. The outer diameter of the grip sleeve 5 is not greater than the inner diameter of the horizontal insertion hole 7, which can ensure that the horizontal insertion hole 7 can pass through the grip sleeve 5.

[0035] The finger-loop groove 8 is a semi-circular inner groove structure with twelve grooves arranged in a circle, which allows for easy insertion and rotation of the sealing side cover 6 with a single finger.

[0036] The elastic damping layer 81 is evenly laid along the inner wall of the finger groove 8. The elastic damping layer 81 is a silicone pad layer, which has damping friction elasticity, ensuring the damping and anti-slip performance of the finger when it is inserted and rotated, and at the same time improving the elastic comfort when the finger is inserted and rotated.

[0037] The smooth layer 21 is uniformly coated along the inner wall of the outer sealing groove 2. The smooth layer 21 is a graphite powder density coating layer with a thickness of forty to fifty micrometers. The surface of the graphite powder density coating layer is smooth and has low friction, which ensures the sealing effect between the outer sealing groove 2 and the outer sealing ring 62. At the same time, it does not affect the rotational movement of the pulley body 1 itself and the exercise effect.

[0038] Working method: The bearing 3 body is fixedly embedded in the bearing mounting hole 11 of the pulley body 1. Then, the instrument spindle 4 is horizontally inserted into the bearing mounting hole 31 and securely installed (both are existing technologies). Next, taking the right-side sealing cover 6 as an example, the sealing cover 6 is horizontally fitted onto the instrument spindle 4 from right to left through the horizontal insertion hole 7. Then, the sealing cover 6 is rotated clockwise. Through the thread transmission of the internal thread 71 and the external thread 41, the right-side sealing cover 6 is stably threaded onto the instrument spindle 4. At the same time, the outer... The sealing ring 62 itself is squeezed and inserted into the outer sealing groove 2 to achieve a sealing effect. At the same time, the inner sealing ring 61 is squeezed and sealed against the outer wall of the external thread 41. Similarly, the sealing side cover 6 on the left side can also be threaded and squeezed to seal, thereby achieving a symmetrical and effective complete sealing of the installation parts of the pulley body 1 and the bearing 3, preventing dust particles from the external environment from directly entering the pulley body 1 and the bearing 3, and improving the service life of the pulley body 1 and the bearing 3 in small-volume pulley-type sports and fitness equipment for waist and abdominal strength.

[0039] Furthermore, by inserting the fingers into the corresponding finger slots 8 and rotating them clockwise, the sealing side cover 6 can be rotated clockwise. Through the thread transmission of the internal thread 71 and the external thread 41, the sealing side cover 6 can be easily rotated manually to install onto the main shaft 4 of the equipment. This facilitates the symmetrical sealing of the installation parts of the pulley body 1 and the bearing 3, further improving the convenience of threaded installation and sealing of the sealing side cover 6.

[0040] In addition, by setting an arc chamfer 42 structure at both ends of the instrument spindle 4, the smoothness of the sealing side cover 6 being fitted onto the instrument spindle 4 through the transverse insertion hole 7 is greatly improved.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bearing-sealed pulley for sports equipment comprising a pulley body (1), characterized in that: The pulley body (1) is provided with a bearing mounting hole (11) and an outer side sealing groove (2), the bearing (3) is fixedly arranged in the bearing mounting hole (11), the bearing mounting hole (31) is provided with a bearing mounting hole (31), the equipment main shaft (4) is fixedly sleeved in the bearing mounting hole (31), the equipment main shaft (4) is provided with an outer thread (41) and a handle sleeve (5), the equipment main shaft (4) is sleeved with a sealing side cover (6), the sealing side cover (6) is provided with an inner side sealing ring (61) and an outer side sealing ring (62), the sealing side cover (6) is provided with a transverse insertion hole (7), and the transverse insertion hole (7) is provided with an inner thread (71). The sealing side cover (6) is provided with a finger buckle groove (8), and the finger buckle groove (8) is provided with an elastic damping layer (81). The equipment main shaft (4) is provided with an arc chamfer (42), and the outer side sealing groove (2) is provided with a smooth layer (21).

2. A bearing seal good sports equipment pulley according to claim 1, characterized in that: The equipment main shaft (4) is transversely fixedly inserted into the bearing mounting hole (31), and the bearing (3) is fixedly embedded in the bearing mounting hole (11).

3. A bearing seal good sports equipment pulley according to claim 1, characterized in that: The outer side sealing ring (62) is extruded and inserted into the outer side sealing groove (2), and the inner side sealing ring (61) is extruded and sleeved on the outer thread (41).

4. The bearing-seal-improved pulley for exercise equipment according to claim 1, wherein: The sealing side cover (6) is threadedly connected with the outer thread (41) through the inner thread (71), and the sealing side cover (6) is symmetrical about the left and right.

5. The bearing-seal-improved pulley for exercise equipment according to claim 1, wherein: The arc chamfer (42) is arranged at the two end corners of the equipment main shaft (4), the handle sleeve (5) is fixedly sleeved on the outer wall surface of the equipment main shaft (4), and the outer diameter size of the handle sleeve (5) is not greater than the inner diameter size of the transverse insertion hole (7).

6. The bearing-seal-improved pulley for exercise equipment according to claim 1, wherein: The finger buckle groove (8) is a semicircular inner groove structure and is circumferentially arranged twelve, and the elastic damping layer (81) is evenly laid along the inner groove wall surface of the finger buckle groove (8).

7. The bearing-seal-improved pulley for exercise equipment of claim 1 wherein: The smooth layer (21) is evenly coated along the inner groove wall surface of the outer side sealing groove (2).

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