CN212601569U

CN212601569U - Striking block assembly inside electric wrench

Info

Publication number: CN212601569U
Application number: CN202021436643.8U
Authority: CN
Inventors: 李本兴
Original assignee: Yuhuan Tongwang Machinery Co ltd
Current assignee: Yuhuan Tongwang Machinery Co ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-02-26
Anticipated expiration: 2030-07-20

Abstract

The utility model belongs to the technical field of electric wrenches, in particular to a striking block assembly in an electric wrench, which comprises a transmission shaft with a central hole, a striking spring and a striking block, wherein the transmission shaft is connected with a striking cylinder for mounting a gear, and a through stepped hole is arranged in the striking block; a connecting shaft is arranged in a central hole of the transmission shaft, a connecting groove is formed in the end face of the connecting shaft, a plurality of mounting grooves are formed in the outer wall of the connecting shaft, V-shaped elastic pieces are arranged in the mounting grooves, and the end points of the V-shaped elastic pieces extend out of the mounting grooves; the utility model discloses a strike block group spare, through the connecting axle that sets up, the connecting axle is used for the drive transmission shaft rotatory, utilizes the V type shell fragment, rubber lip block and the rubber lantern ring that set up simultaneously, can guarantee the reliability that connecting axle and transmission shaft transmission are connected to reduced the wearing and tearing that transmission motor output shaft direct drive connection transmission shaft caused, prolonged the life of this strike block group spare greatly.

Description

Striking block assembly inside electric wrench

Technical Field

The utility model belongs to the technical field of electric spanner, concretely relates to strike block group spare inside electric spanner.

Background

The electric wrench is an electric tool for screwing and unscrewing bolts and nuts, and is a tool for screwing high-strength bolts, and is used for steel structure bridges, factory buildings, chemical engineering, the initial screwing of large hexagon head high-strength bolt construction in power generation equipment installation, the initial screwing of final screwing and twisting shear type high-strength bolts, and the occasions with strict requirements on the torque or axial force of bolt fasteners, the impact electric wrench is one of the electric wrenches, and is an electric wrench with a rotary tangential impact mechanism, the reaction torque to an operator during working is small, the striking block component is a core component of the impact electric wrench, a micro motor is mostly adopted as a driving motor, a transverse foot on an output shaft is struck through a striking block, so that the torque is transmitted, and the inertia force generated by a high-speed rotating striking block flywheel is converted into impact force to achieve the purpose of dismounting the bolts or the nuts.

Original striking block subassembly is when using, and the transmission shaft of subassembly is direct to be connected with driving motor's output shaft usually, uses the back for a long time, because the existence of moment of torsion, the transmission shaft must can produce the wearing and tearing of great degree to influence electric wrench's life.

SUMMERY OF THE UTILITY MODEL

For solving the above-mentioned problem that exists among the prior art, the utility model provides a strike block group spare inside electric spanner has convenient to use and long service life's characteristics.

In order to achieve the above object, the utility model provides a following technical scheme: a striking block assembly in an electric wrench comprises a transmission shaft with a central hole, an impact spring and an impact block, wherein the transmission shaft is connected with an impact cylinder for mounting a gear, a through stepped hole is formed in the impact block, a positioning groove for embedding one end of the impact spring is formed in the end surface of the impact block, a middle gasket is arranged in the positioning groove, the end part of the transmission shaft penetrates through the stepped hole, a rubber gasket is arranged on the end surface of the impact cylinder, and the impact spring is sleeved on the transmission shaft and is positioned between the rubber gasket and the middle gasket; a connecting shaft is arranged in a central hole of the transmission shaft, a connecting groove is formed in the end face of the connecting shaft, a plurality of mounting grooves are formed in the outer wall of the connecting shaft, V-shaped elastic pieces are arranged in the mounting grooves, and the end points of the V-shaped elastic pieces extend out of the mounting grooves; and a rubber supporting cushion block is arranged between the V-shaped elastic sheet and the mounting groove.

As an optimal technical scheme of the utility model, the outer wall of transmission shaft with be equipped with the steel ball between the inner wall of shoulder hole No. one.

As an optimized technical scheme of the utility model, well gasket with be equipped with No. two steel balls between the groove end wall of constant head tank.

As a preferred technical solution of the present invention, the number of the plurality of mounting grooves is four, and the four mounting grooves are distributed in an annular shape at equal intervals; the inner wall of the central hole of the transmission shaft is provided with a plurality of raised lines which are distributed in an annular and equidistant mode, and the raised lines are of a semi-cylinder structure.

As an optimized technical scheme of the utility model, still overlap respectively on the connecting axle and be in the rubber lantern ring of mounting groove both sides.

As an optimized technical scheme of the utility model, the lateral surface tail end of connecting axle is fixed with the go-between the fixed orifices has been seted up on the go-between.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a strike block group spare, through the connecting axle that sets up, the connecting axle is used for the drive transmission shaft rotatory, utilizes the V type shell fragment, rubber lip block and the rubber lantern ring that set up simultaneously, can guarantee the reliability that connecting axle and transmission shaft transmission are connected to reduced the wearing and tearing that transmission motor output shaft direct drive connection transmission shaft caused, prolonged the life of this strike block group spare greatly.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the front cross-sectional structure of the present invention;

fig. 3 is a schematic front sectional view of the connecting shaft of the present invention;

fig. 4 is a schematic view of the cross-sectional structure of fig. 3 along the direction a-a in the present invention;

FIG. 5 is a schematic view of the front structure of the impact barrel of the present invention;

in the figure: 1. a drive shaft; 2. a rubber gasket; 3. an impact spring; 4. a first steel ball; 5. a middle gasket; 6. a second steel ball; 7. an impact block; 8. a stepped hole; 9. positioning a groove; 10. an impact cylinder; 11. a connecting shaft; 12. connecting grooves; 13. a connecting ring; 14. a fixing hole; 15. mounting grooves; 16. a V-shaped elastic sheet; 17. a rubber support pad block; 18. a rubber collar; 19. and (4) raised strips.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

Referring to fig. 1-5, the present invention provides the following technical solutions: a striking block assembly in an electric wrench comprises a transmission shaft 1 with a central hole, an impact spring 3 and an impact block 7, wherein the transmission shaft 1 is connected with an impact cylinder 10 used for mounting a gear, a through stepped hole 8 is formed in the impact block 7, a positioning groove 9 for embedding one end of the impact spring 3 is formed in the end face of the impact block 7, a middle gasket 5 is arranged in the positioning groove 9, the end part of the transmission shaft 1 penetrates through the stepped hole 8, a rubber gasket 2 is arranged on the end face of the impact cylinder 10, and the impact spring 3 is sleeved on the transmission shaft 1 and is located between the rubber gasket 2 and the middle gasket 5; a connecting shaft 11 is arranged in a central hole of the transmission shaft 1, a connecting groove 12 is formed in the end face of the connecting shaft 11, a plurality of mounting grooves 15 are formed in the outer wall of the connecting shaft 11, V-shaped elastic pieces 16 are arranged in the mounting grooves 15, and end points of the V-shaped elastic pieces 16 extend out of the mounting grooves 15; be equipped with rubber support pad 17 between V type shell fragment 16 and the mounting groove 15, when using, electric wrench's motor output shaft passes through spread groove 12 and is connected with connecting axle 11 transmission, the tip embedding of connecting axle 11 is downthehole in the centre of transmission shaft 1, be connected with transmission shaft 1 transmission, V type shell fragment 16's summit can be under its elastic force effect and rubber support pad 17's elastic support with transmission shaft 1 centre bore inner wall overlap joint, guarantee the reliability that connecting axle 11 is connected with transmission shaft 1 transmission, guarantee that connecting axle 11 reliably drives transmission shaft 1 rotation in order to carry out the operation.

Specifically, as shown in fig. 1 and fig. 2, in this embodiment, a first steel ball 4 is disposed between an outer wall of the transmission shaft 1 and an inner wall of the stepped hole 8, so as to change sliding friction between the transmission shaft 1 and the impact block 7 into rolling friction, ensure reliable operation of the striking block assembly, and prolong the service life of the striking block assembly.

Specifically, according to fig. 1 and fig. 2, in this embodiment, a second steel ball 6 is disposed between the middle gasket 5 and the groove end wall of the positioning groove 9, so as to change the sliding friction between the impact spring 3 and the impact block 7 into rolling friction, ensure reliable operation of the striking block assembly, and prolong the service life of the striking block assembly.

Specifically, as shown in fig. 2, fig. 3, fig. 4 and fig. 5, in the embodiment, the number of the plurality of mounting grooves 15 is four, and the four mounting grooves 15 are annularly and equidistantly distributed, so that the transmission connection between the connecting shaft 11 and the transmission shaft 1 is firmer; a plurality of raised lines 19 which are distributed at equal intervals in a ring shape are distributed on the inner wall of a central hole of the transmission shaft 1, the raised lines 19 are of a semi-cylinder structure, the connection friction force between the connecting shaft 11 and the transmission shaft 1 is increased, and the stability of connection between the connecting shaft 11 and the transmission shaft 1 is ensured.

Specifically, according to fig. 2 and fig. 3, in this embodiment, the connecting shaft 11 is further respectively sleeved with rubber collars 18 at two sides of the mounting groove 15, so as to further ensure the stability of the connection between the connecting shaft 11 and the transmission shaft 1.

Specifically, according to fig. 2, 3 and 4, in the embodiment, the connection ring 13 is fixed at the tail end of the outer side surface of the connection shaft 11, the connection ring 13 is provided with the fixing hole 14, and if necessary, the connection shaft 11 can be further fixed by using a bolt, so that the connection shaft 11 is fixed on the end surface of the impact cylinder 10, and the connection stability of the connection shaft 11 and the transmission shaft 1 is ensured.

The utility model discloses a theory of operation and use flow: when the striking block assembly is used, a motor output shaft of the electric wrench is in transmission connection with the connecting shaft 11 through the connecting groove 12, the end part of the connecting shaft 11 is embedded into a central hole of the transmission shaft 1 and is in transmission connection with the transmission shaft 1, and the vertex of the V-shaped elastic sheet 16 is lapped on the inner wall of the central hole of the transmission shaft 1 under the action of elasticity and the elastic support of the rubber supporting cushion block 17, so that the reliability of transmission connection between the connecting shaft 11 and the transmission shaft 1 is ensured, and the connecting shaft 11 is ensured to reliably drive the transmission shaft 1 to rotate so as to carry out operation;

if necessary, the connecting shaft 11 can be further fixed by using bolts, and the connecting shaft 11 is fixed on the end face of the impact cylinder 10, so that the stability of connection between the connecting shaft 11 and the transmission shaft 1 is ensured.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a strike block group spare inside electric spanner, is including transmission shaft (1) that has the centre bore, impact spring (3) and impact piece (7) be connected with an impact section of thick bamboo (10) that are used for installing the gear on transmission shaft (1), its characterized in that: a through stepped hole (8) is formed in the impact block (7), a positioning groove (9) for embedding one end of the impact spring (3) is formed in the end face of the impact block (7), a middle gasket (5) is arranged in the positioning groove (9), the end of the transmission shaft (1) penetrates through the stepped hole (8), a rubber gasket (2) is arranged on the end face of the impact cylinder (10), and the impact spring (3) is sleeved on the transmission shaft (1) and is located between the rubber gasket (2) and the middle gasket (5); a connecting shaft (11) is arranged in a central hole of the transmission shaft (1), a connecting groove (12) is formed in the end face of the connecting shaft (11), a plurality of mounting grooves (15) are formed in the outer wall of the connecting shaft (11), V-shaped elastic sheets (16) are arranged in the mounting grooves (15), and the end points of the V-shaped elastic sheets (16) extend out of the mounting grooves (15); and a rubber supporting cushion block (17) is arranged between the V-shaped elastic sheet (16) and the mounting groove (15).

2. A striking block assembly in a power wrench as claimed in claim 1, wherein: a steel ball (4) is arranged between the outer wall of the transmission shaft (1) and the inner wall of the stepped hole (8).

3. A striking block assembly in a power wrench as claimed in claim 1, wherein: and a second steel ball (6) is arranged between the middle gasket (5) and the groove end wall of the positioning groove (9).

4. A striking block assembly in a power wrench as claimed in claim 1, wherein: the number of the installation grooves (15) is four, and the four installation grooves (15) are distributed in an annular shape at equal intervals; the inner wall of the central hole of the transmission shaft (1) is provided with a plurality of raised lines (19) which are distributed in an annular and equidistant mode, and the raised lines (19) are of a semi-cylinder structure.

5. A striking block assembly in a power wrench as claimed in claim 1, wherein: the connecting shaft (11) is further respectively sleeved with rubber lantern rings (18) located on two sides of the mounting groove (15).

6. A striking block assembly in a power wrench as claimed in claim 1, wherein: a connecting ring (13) is fixed at the tail end of the outer side face of the connecting shaft (11), and a fixing hole (14) is formed in the connecting ring (13).