CN213598546U

CN213598546U - Circular saw gear box

Info

Publication number: CN213598546U
Application number: CN202022482608.6U
Authority: CN
Inventors: 周伟春; 王峰奇
Original assignee: Yuyao Linding Transmission Co ltd
Current assignee: Yuyao Linding Transmission Co ltd
Priority date: 2020-10-31
Filing date: 2020-10-31
Publication date: 2021-07-02
Anticipated expiration: 2030-10-31

Abstract

The application relates to a circular saw gear box relates to electric tool spare part field. It includes the casing, is used for installing the installation cavity of circular saw blade, is located the installation cavity and is used for inlaying the bearing chamber of establishing the bearing and inlays the bearing of establishing at the bearing intracavity, the casing is located the bearing chamber and is close to the sealed lid of fixedly connected with through fixed subassembly fixedly connected with on the surface of the one end of installation cavity. The sealed lid in this application seals the bearing of bearing cavity to make the bearing reduce to some extent because of receiving external pollution and take place the probability of damage, and then make the circular saw gear case can play better guard action to the bearing.

Description

Circular saw gear box

Technical Field

The application relates to the field of electric tool parts, in particular to a circular saw gear box.

Background

The circular saw gear box is a housing component for fixedly mounting the motor, the reduction mechanism and the circular saw blade.

Referring to fig. 1, a conventional circular saw gear box includes a housing 1, a connecting hole 13 for passing an output shaft of a power supply, an installation cavity 11 below the connecting hole 13 for installing a circular saw blade, a bearing cavity 12 for accommodating a bearing 4 is disposed on a side wall of the installation cavity 11 of the housing 1, and the bearing 4 is embedded in the bearing cavity 12.

In view of the above-mentioned related technologies, the inventor thinks that the bearing of the current common circular saw gear box is easily polluted by external sundries in the using process, so that the service life of the bearing is affected, and the protection of the circular saw gear box on the bearing is poor.

SUMMERY OF THE UTILITY MODEL

In order to improve the protectiveness of circular saw gear case to the bearing, this application provides a circular saw gear case.

The application provides a pair of circular saw gear box adopts following technical scheme:

the utility model provides a circular saw gear box, includes the casing, is used for installing the installation cavity of circular saw blade, is located the installation cavity and is used for inlaying the bearing chamber of establishing the bearing and inlays the bearing of establishing at the bearing chamber, the casing is located the bearing chamber and is close to the one end of installation cavity on the surface through a fixed subassembly fixedly connected with sealed lid.

Through adopting above-mentioned technical scheme, the sealed lid through fixed subassembly fixed connection can seal the bearing of bearing cavity on the casing to make the bearing keep apart with the external world. When the bearing is sealed by sealed lid in the bearing chamber, external debris are difficult to the bearing and cause the pollution, and the bearing makes its gyration precision and life-span receive the risk of influence to reduce to some extent because of receiving external debris to pollute to make the protective action of annular saw gear box to the bearing improve to some extent.

Optionally, fixed subassembly includes joint foot, joint board and supplies joint foot male joint mouth, and the joint foot rotates to be connected and is located the casing installation cavity and be close to bearing cavity one end on the surface, and the joint foot arranges around bearing cavity circumference, and the joint board corresponds the setting at sealed lid back to bearing cavity on the surface with the joint foot, and the joint mouth setting is kept away from one side of sealed lid at the joint board, and the joint foot is inserted and is established in the joint mouth of joint board and joint foot and joint board mutual joint.

Through adopting above-mentioned technical scheme, when sealed lid lock was on sealed chamber, the user can aim at the joint board with the joint foot and rotate the joint foot, and the user is rotatory to inserting the joint mouth and fixing the joint foot joint in the joint mouth of joint board with the joint foot joint. The mutual joint between joint board and the joint foot makes to realize fixed connection between sealed lid and the casing to make sealed lid keep its sealed effect to the bearing chamber, and then make sealed lid can keep its guard action to the bearing that is located the bearing chamber.

Optionally, one side of the sealing cover facing the bearing cavity is provided with an annular protrusion, and the surface of the shell, which is located on one side of the mounting cavity close to the bearing cavity, is provided with an annular groove matched with the annular protrusion.

Through adopting above-mentioned technical scheme, when sealed lid need be installed on the casing, the user can insert the annular protrusion of sealed lid in the annular groove with it matched with, the annular groove makes along the radial motion of sealed lid between sealed lid and the casing restricted to the limiting displacement of annular protrusion to make the annular groove play the positioning action with the cooperation of annular protrusion to the installation of sealed lid, sealed lid fixes a position more convenient and fast at the in-process of installation.

Optionally, an annular seal groove is formed in the surface, facing the bearing cavity, of the seal cover.

Through adopting above-mentioned technical scheme, when the dust enters into between sealed lid and the casing from the gap between sealed lid and the casing, most dust can get into the seal groove to make the dust enter into the bearing chamber and pollute the probability of bearing between casing and the sealed lid and reduce to some extent, the bearing influences its probability of gyration precision and life-span because of receiving external dust pollution and reduces to some extent, thereby makes the protection of annular saw gear box to the bearing to some extent improve.

Optionally, a center hole for the rotating shaft to pass through is formed in the center of the sealing cover, a filling groove is formed in the inner wall, located at the center hole, of the sealing cover in the circumferential direction of the center hole, a sealing element is filled in the filling groove, the rotating shaft penetrates through the inner ring of the bearing, the rotating shaft extends out of the bearing cavity through the center hole of the rotating shaft, and the sealing element abuts against the cylindrical surface of the rotating shaft.

By adopting the technical scheme, because a gap exists between the central hole of the sealing cover and the rotating shaft, the gap is filled by the sealing element, and the gap is filled by the sealing element filled in the filling groove, so that the probability that dust enters the bearing cavity from the center of the sealing cover and pollutes the bearing is reduced, and the protective effect of the shell on the bearing is further improved.

Optionally, the inner wall surface of the bearing cavity of the housing is provided with a first insert block, the first insert block is arranged along the axial direction of the bearing cavity, the first insert block is circumferentially arranged on the inner wall surface of the bearing cavity of the housing, a first slot for inserting the first insert block is correspondingly arranged on the outer cylindrical surface of the bearing outer ring and the first insert block, and the first insert block is inserted into the first slot.

Through adopting above-mentioned technical scheme, when the first inserted block of casing is inserted and is established in the first slot that is located the bearing outer lane, first slot plays the circumference restriction effect to first inserted block to make unable emergence relative rotation between the outer lane of bearing and the casing, thereby make the bearing the gyration precision at the during operation improve to some extent.

Optionally, a second insert block is arranged on the cylindrical surface of the rotating shaft on the side close to the bearing, the second insert block is arranged along the axial direction of the rotating shaft, the second insert block is circumferentially arranged on the cylindrical surface of the rotating shaft, a second slot for inserting the second insert block is correspondingly arranged on the inner cylindrical surface of the bearing inner ring and the second insert block, and the second insert block is inserted into the second slot.

Through adopting above-mentioned technical scheme, when the inner circle of bearing was worn to establish by the pivot, the second inserted block of pivot and the second slot of bearing cooperated, and the second slot plays the circumference restriction effect to the second inserted block to make and can't take place relative rotation between pivot and the bearing inner circle, and then guaranteed the bearing at the gyration precision of during operation.

Optionally, a protective cover is integrally arranged above the mounting cavity of the housing.

Through adopting above-mentioned technical scheme, can produce the spark when electric circular saw's saw blade is cut by the processing work piece, because the temperature of spark is higher, therefore the spark has scald user's risk. The protective cover can perform certain blocking effect on sparks, so that the risk that a user is scalded by the sparks is reduced. And the protection casing sets up as an organic whole with the casing, consequently when electric circular saw is assembling, need not to increase this process of assembly protection casing to it is comparatively convenient to make the assembling process of electric circular saw.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the sealing cover seals the bearing in the bearing cavity, so that the risk that the service life of the bearing is influenced by external dust pollution is reduced, and the circular saw gear box has good protection on the bearing;

2. the protective cover and the shell are integrally arranged, so that the electric circular saw has better convenience in the assembling process.

Drawings

FIG. 1 is a schematic view of a gear box of a conventional circular saw.

Fig. 2 is a schematic view of the overall structure of the present embodiment.

Fig. 3 is an exploded view of the connection structure between the sealing cover and the housing in this embodiment.

Fig. 4 is a schematic sectional view of the sealing cap in this embodiment.

Description of reference numerals: 1. a housing; 11. a mounting cavity; 12. a bearing cavity; 121. a first insert block; 13. connecting holes; 14. a ring groove; 2. a protective cover; 3. a sealing cover; 31. a central bore; 32. an annular protrusion; 33. a sealing groove; 34. filling the groove; 35. a seal member; 4. a bearing; 41. a first slot; 42. a second slot; 5. a rotating shaft; 51. a second insert block; 6. a fixing assembly; 61. a card pin; 611. a clamping head; 62. a clamping and connecting plate; 63. a card interface.

Detailed Description

The present application is described in further detail below with reference to figures 2-4.

The embodiment of the application discloses a circular saw gear box. Referring to fig. 2 and 3, a circular saw gear box includes a housing 1, a shield 2, a mounting chamber 11, a bearing chamber 12, a coupling hole 13, and a sealing cover 3. Set up connecting hole 13 on casing 1 and be used for inserting the output shaft of establishing the generator, installation cavity 11 is located connecting hole 13 below and is used for installing the circular saw blade, bearing cavity 12 is located installation cavity 11, and the embedded bearing 4 that is equipped with in bearing cavity 12, the inner circle of bearing 4 wears to be equipped with one and is used for carrying out the pivot 5 of exporting with the power that the motor produced, sealed lid 3 is through the opening part of 6 fixed mounting in bearing cavity 12 of fixed subassembly, a centre bore 31 has been seted up in the center department of sealed lid 3, pivot 5 passes centre bore 31 and stretches out from bearing cavity 12. Protection casing 2 is integrative to be established in the production process of casing 1 and is located the top of installation cavity 11 at casing 1, and when the electric circular saw was cutting the work piece, protection casing 2 can block the spark that produces to the risk that the user was scalded by the spark has been reduced.

The inner wall of the bearing cavity 12 of the housing 1 is integrally provided with four first insertion blocks 121, the length extending direction of the first insertion blocks 121 is parallel to the axial direction of the bearing cavity 12, and the first insertion blocks 121 are uniformly arranged on the inner wall of the bearing cavity 12 of the housing 1 in the circumferential direction. Four first slots 41 matched with the first inserting blocks 121 are correspondingly formed in the outer cylindrical surface of the outer ring of the bearing 4 and the first inserting blocks 121, and when the bearing 4 is embedded in the bearing cavity 12, the first slots 41 in the outer ring of the bearing 4 are matched with the first inserting blocks 121, so that relative rotation cannot occur between the outer ring of the bearing 4 and the shell 1, and the rotation precision of the bearing 4 is further guaranteed.

Four second insertion blocks 51 are integrally arranged on the outer cylindrical surface of the rotating shaft 5 on the side close to the bearing 4, the length extension direction of the second insertion blocks 51 is parallel to the axial direction of the rotating shaft 5, and the four second insertion blocks 51 are uniformly arranged on the outer cylindrical surface of the rotating shaft 5 in the circumferential direction. Four second slots 42 for inserting the second insertion block 51 are formed in the inner cylindrical surface of the inner ring of the bearing 4, the length extending direction of the second slots 42 is parallel to the radial direction of the bearing 4, the four second slots 42 are uniformly arranged on the inner cylindrical surface of the inner ring of the bearing 4, and when the rotating shaft 5 is inserted into the inner ring of the bearing 4, the second insertion block 51 is matched with the second slots 42, so that the rotation precision of the bearing 4 is further guaranteed.

As shown in fig. 3 and 4, an annular protrusion 32 is integrally formed on a surface of the sealing cover 3 facing the housing 1, a center of the annular protrusion 32 coincides with a center of the sealing cover 3, a ring groove 14 for inserting the annular protrusion 32 is formed on a plane of the mounting cavity 11 on a side close to the bearing cavity 12 of the housing 1, a center of the ring groove 14 coincides with a center of the mounting cavity 11, and when the sealing cover is fixedly mounted on the housing 1, the annular protrusion 32 is inserted into the ring groove 14. The engagement between the ring groove 14 and the annular protrusion 32 plays a role in positioning during the installation of the sealing cover 3, thereby facilitating the installation process of the sealing cover 3.

Two annular seal grooves 33 are formed in the surface, facing the shell 1, of the seal cover 3, the centers of the two seal grooves 33 are overlapped, the center of the seal groove 33 is overlapped with the center of the seal cover 3, and the radius of the seal groove 33 is larger than that of the annular protrusion 32. When a gap between the dust movable sealing cover 3 and the shell 1 enters between the shell 1 and the sealing cover 3, dust can enter the sealing groove 33, so that the probability of dust entering the bearing cavity 12 is reduced. An annular filling groove 34 is formed in the inner cylindrical surface of the sealing cover 3 located in the central hole 31, and a sealing element 35 is filled in the filling groove 34. The seal 35 fills the gap between the shaft 5 and the seal cap 3, thereby reducing the possibility of dust entering the bearing cavity 12 from the central hole 31 of the seal cap 3.

The fixing assembly 6 includes a card pin 61, a card board 62 and a card interface 63. The clamping foot 61 is of an L-shaped structure, the end of the clamping foot 61 is hinged to the surface of the housing 1 at the end of the mounting cavity 11 close to the bearing cavity 12, the clamping foot 61 is provided with two clamping feet 61, the two clamping feet 61 are symmetrically arranged on two sides of the bearing cavity 12 about the center of circle of the bearing cavity 12, and one end of the clamping foot 61, which is far away from the hinge point between the clamping foot and the housing 1, is integrally provided with a clamping joint 611. The joint plate 62 and the joint pin 61 are correspondingly welded on the surface of the sealing cover 3 back to the casing 1, a joint head 611 inserted joint interface 63 for the joint pin 61 is arranged on the joint plate 62, and the joint interface 63 is arranged on the wall surface of the joint plate 62 far away from one side of the sealing cover 3.

After the annular protrusion 32 of the sealing cover 3 is inserted into the annular groove 14 of the housing 1, the user rotates the clamping pin 61 and inserts the clamping joint 611 into the clamping interface 63 of the clamping plate 62, so that the clamping pin 61 and the clamping plate 62 are clamped, and the sealing cover 3 is fixedly connected to the housing 1. The fixing component 6 enables the sealing cover 3 to keep the sealing effect on the bearing cavity 12, so that the bearing 4 can be isolated from the outside, and the shell 1 has a good protection effect on the bearing 4.

The implementation principle of this application embodiment annular saw gear box does: the bearing 4 embedded in the bearing cavity 12 is sealed by the sealing cover 3, and the probability that foreign matters such as external dust enter the bearing cavity 12 to pollute the bearing 4 is reduced, so that the probability that the rotation precision and the service life of the bearing 4 are influenced by the pollution of the external dust is reduced, and the shell 1 has a better protection effect on the bearing 4.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a circular saw gear box, includes casing (1), installation cavity (11) that are used for installing the circular saw piece, is located installation cavity (11) and is used for inlaying bearing chamber (12) of establishing bearing (4) and inlays bearing (4) of establishing in bearing chamber (12), its characterized in that: the shell (1) is located on the surface of one end, close to the installation cavity (11), of the bearing cavity (12) and is fixedly connected with a sealing cover (3) through a fixing component (6).

2. A circular saw gearbox according to claim 1, characterised in that: fixed subassembly (6) are including card pin (61), joint board (62) and supply card pin (61) male joint mouth (63), card pin (61) rotate to be connected on being located casing (1) installation cavity (11) and being close to bearing chamber (12) one end on the surface, and joint pin (61) arrange around bearing chamber (12) circumference, joint board (62) correspond with card pin (61) and set up on the sealed surface that covers (3) back to bearing chamber (12), and joint mouth (63) set up the one side of sealed lid (3) is kept away from in joint board (62), joint pin (61) insert and establish in joint mouth (63) of joint board (62) and joint pin (61) and joint board (62) mutual joint.

3. A circular saw gearbox according to claim 1, characterised in that: the sealing cover (3) is provided with an annular protrusion (32) on the surface facing the bearing cavity (12), and the surface of the shell (1) on one side of the mounting cavity (11) close to the bearing cavity (12) is provided with an annular groove (14) matched with the annular protrusion (32).

4. A circular saw gearbox according to claim 1, characterised in that: and an annular sealing groove (33) is formed in the surface, facing the bearing cavity (12), of the sealing cover (3).

5. A circular saw gearbox according to claim 1, characterised in that: the sealing structure is characterized in that a center hole (31) for the rotating shaft (5) to penetrate is formed in the center of the sealing cover (3), a filling groove (34) is formed in the inner wall, located at the center hole (31), of the sealing cover (3) in the circumferential direction of the center hole (31), a sealing element (35) is filled in the filling groove (34), the rotating shaft (5) penetrates through the inner ring of the bearing (4), the rotating shaft (5) penetrates through the center hole (31) of the rotating shaft (5) to stretch out of the bearing cavity (12), and the sealing element (35) abuts against the cylindrical surface of the rotating shaft (5).

6. A circular saw gearbox according to claim 1, characterised in that: the bearing is characterized in that a first insert block (121) is arranged on the inner wall surface of the bearing cavity (12) of the shell (1), the first insert block (121) is arranged along the axial direction of the bearing cavity (12), the first insert block (121) is circumferentially arranged on the inner wall surface of the bearing cavity (12) of the shell (1), a first insert groove (41) for inserting the first insert block (121) is correspondingly arranged on the outer cylindrical surface of the outer ring of the bearing (4) and the first insert block (121), and the first insert block (121) is inserted into the first insert groove (41).

7. A circular saw gearbox according to claim 5, characterised in that: the bearing is characterized in that a second insertion block (51) is arranged on the cylindrical surface of one side, close to the bearing (4), of the rotating shaft (5), the second insertion block (51) is arranged along the axial direction of the rotating shaft (5), the second insertion block (51) is circumferentially arranged on the cylindrical surface of the rotating shaft (5), a second insertion groove (42) for inserting the second insertion block (51) is correspondingly arranged on the inner cylindrical surface of the inner ring of the bearing (4) and the second insertion block (51), and the second insertion block (51) is inserted into the second insertion groove (42).

8. A circular saw gearbox according to claim 1, characterised in that: the shell (1) is integrally provided with a protective cover (2) above the mounting cavity (11).