Palm center type ratchet wrench

Abstract

The utility model discloses a palm type ratchet wrench which comprises an annular shell, a connector cylinder is inserted in a middle through hole of the annular shell in a sleeved mode, a radial extending edge is formed on the outer side wall of the bottom end of the connector cylinder, and the top face of the radial extending edge is tightly attached to the bottom face of the inner side of the annular shell. A direction connector extending downwards is formed in the middle of the bottom end face of the connector column body. An upper column body extending upwards is formed in the middle of the top face of the connector column body, a connecting screw joint column extending upwards is formed in the middle of the top face of the upper column body, the cover body is placed on the top face of the middle of the annular shell, a round protruding part extending downwards is formed in the middle of the bottom face of the cover body, and the round protruding part is inserted into a through hole in the middle of the annular shell in a sleeved mode. Under the action of the locking nut and the compression spring, the annular shell, the connector column body and the cover body are firmly connected and are not easy to disassemble, and normal use of the connector is guaranteed.

Description

Technical field:

[0001] The utility model relates to the technical field of ratchet wrenches, and more specifically to a palm-type ratchet wrench. Background technology:

[0002] A palm-type ratchet wrench, as the name suggests, is a ratchet wrench that can be operated by holding it in the palm of the hand. It generally includes a circular ring-shaped shell, a cover body and a connecting head cylinder installed in the circular ring-shaped shell. A connecting head (D head or square head) is formed at the bottom of the connecting head cylinder for connecting a sleeve to achieve operation. The existing circular ring-shaped shell is between the radial edges formed on the lower outer wall of the cover body and the connecting head cylinder, and the shaft portion through the top of the connecting head cylinder extends into the recessed hole of the cover body, and a retaining spring is provided at the extended shaft portion to limit the connection. However, during use, due to the thin thickness of the retaining spring and the limited retaining strength, the retaining spring will be deformed or loosened after a certain period of use, making it impossible to limit the installation between the cover body and the connecting head cylinder, which will cause the circular ring-shaped shell, the cover body and the connecting head cylinder to be disassembled and unusable. Utility model content:

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a palm-type ratchet wrench, which uses a locking nut and a compression spring to firmly connect a circular shell, a connector column and a cover body, is not easy to disassemble, and ensures normal use.

[0004] The solution of the utility model to solve the technical problem is:

[0005] A palm ratchet wrench comprises a circular ring shell, a connecting head column is inserted into a through hole in the middle of the circular ring shell, a radially extending edge is formed on the outer wall of the bottom end of the connecting head column, the top surface of the radially extending edge is in close contact with the bottom surface of the inner side of the circular ring shell, and a downwardly extending directional connecting head is formed in the middle of the bottom end surface of the connecting head column;

[0006] The middle part of the top surface of the connecting head column is formed with an upper column extending upward, and the middle part of the top surface of the upper column is formed with a connecting screw column extending upward. The cover body is placed on the middle top surface of the annular shell, and the middle part of the bottom surface of the cover body is formed with a circular protrusion extending downward, and the circular protrusion is inserted into the middle through hole of the annular shell. The bottom edge of the cover body is above the top surface of the annular shell and close to the top surface of the annular shell. A central concave hole is formed in the middle part of the top surface of the cover body, and a lower through hole is formed in the middle part of the bottom surface of the central concave hole. The upper column is inserted into the lower through hole, and the outer wall of the upper column is close to the inner wall of the lower through hole. The top end of the upper column extends out of the top end of the lower through hole. The connection A vertical center through hole is formed in the middle of the top surface of the screw column, which extends vertically downward and extends out of the bottom end surface of the connecting head. The locking nut is screwed on the external thread of the connecting screw column, and the bottom surface of the locking nut is pressed against the top surface of the upper column. The bottom surface of the edge of the locking nut is above the bottom surface of the central recessed hole around the lower through hole. The push rod is inserted into the central recessed hole and the vertical center through hole. A circular portion is formed on the top of the push rod, and the circular portion is in the central recessed hole. The outer side wall of the circular portion is close to the inner side wall of the top of the central recessed hole. A compression spring is inserted into the upper part of the push rod, and the top end of the compression spring exerts force on the bottom surface of the circular portion, and the bottom end of the compression spring exerts force on the top surface of the locking nut.

[0007] An arch-shaped notch is formed on one side edge of the top surface of the connector column, a bow-shaped stopper is inserted into the arch-shaped notch, an outer arc-shaped wall of the stopper is formed with an outer tooth portion, and an inner tooth portion is formed on the inner wall of the middle through hole of the annular shell, and the inner tooth portion matches the outer tooth portion.

[0008] A heart-shaped spring piece is inserted and sleeved on the upper part of the upper column, and the spring piece is located between the bottom surface of the circular protrusion and the top surface of the connecting head column.

[0009] The ends of the two heart-shaped arc portions of the spring member are formed with downwardly extending vertical rods, which are inserted into the vertical through holes formed in the middle of the block, and the side walls of the two vertical rods on the sides away from each other are elastically pressed against the inner side walls of the corresponding vertical through holes.

[0010] A downwardly extending swinging vertical column is formed on the bottom surface of one end of the circular raised portion of the cover body. The swinging vertical column is inserted into the heart-shaped tip of the spring member and clamped on both inner side walls of the heart-shaped tip of the spring member.

[0011] The outstanding effects of the utility model are:

[0012] The locking nut and the compression spring are used to firmly connect the annular shell, the connecting head column and the cover body, which are not easy to be disassembled, thus ensuring the normal use thereof. Description of the drawings:

[0013] Figure 1It is an exploded schematic diagram of the utility model;

[0014] Figure 2 It is a partial structural schematic diagram of the utility model;

[0015] Figure 3 It is a partial cross-sectional view of the utility model;

[0016] Figure 4 It is a partial cross-sectional view of another part of the utility model. Specific implementation method:

[0017] For example, see Figures 1 to 4 As shown, a palm ratchet wrench comprises a circular ring shell 10, a connecting head cylinder 20 is inserted into the middle through hole of the circular ring shell 10, a radially extending edge 21 is formed on the outer wall of the bottom end of the connecting head cylinder 20, the top surface of the radially extending edge 21 is in close contact with the bottom surface of the inner side of the circular ring shell 10, and a directional connecting head 22 extending downward is formed in the middle of the bottom end surface of the connecting head cylinder 20, and the directional connecting head 22 is used to connect the sleeve, and can be used to remove bolts, nuts and other parts;

[0018] An upper cylinder 23 extending upward is formed in the middle of the top surface of the connecting head cylinder 20, and a connecting screw column 24 extending upward is formed in the middle of the top surface of the upper cylinder 23. The cover body 30 is placed on the middle top surface of the annular shell 10, and a circular protrusion 31 extending downward is formed in the middle of the bottom surface of the cover body 30. The circular protrusion 31 is inserted into the middle through hole of the annular shell 10. The bottom edge of the cover body 30 is above the top surface of the annular shell 10 and close to the top surface of the annular shell 10. A central concave hole 32 is formed in the middle of the top surface of the cover body 30, and a lower through hole 33 is formed in the middle of the bottom surface of the central concave hole 32. The upper cylinder 23 is inserted into the lower through hole 33, and the outer wall of the upper cylinder 23 is close to the inner wall of the lower through hole 33. The top of the upper cylinder 23 extends out of the top of the lower through hole 33. A vertical center through hole 25 is formed in the middle of the top surface of the connecting column 24, which extends vertically downward and extends out of the bottom end surface of the connecting head 22. A locking nut 26 is screwed on the external thread of the connecting screw column 24, and the bottom surface of the locking nut 26 is pressed against the top surface of the upper column 23. The bottom surface of the edge of the locking nut 26 is above the bottom surface of the central recessed hole 32 around the lower through hole 33. The push rod 40 is inserted into the central recessed hole 32 and the vertical center through hole 25. A circular portion 41 is formed on the top of the push rod 40. The circular portion 41 is in the central recessed hole 32, and the outer side wall of the circular portion 41 is close to the inner side wall of the top of the central recessed hole 32. A compression spring 1 is inserted into the upper part of the push rod 40, and the top end of the compression spring 1 forces the bottom surface of the circular portion 41, and the bottom end of the compression spring 1 forces the top surface of the locking nut 26.

[0019] Furthermore, the top surface of the circular portion 41 is a spherical surface, and an annular groove is formed in the middle of the bottom surface of the circular portion 41. The upper part of the compression spring 1 is inserted into the annular groove, and the top end of the compression spring 1 is applied to the top surface of the annular groove; the compression spring 1 can exert pressure on the locking nut 26 to reduce the possibility of its loosening.

[0020] Furthermore, a radial extension portion 321 is formed on the inner side wall of the top end of the central recessed hole 32, and the bottom surface of the radial extension portion 321 is located above the edge of the top surface of the circular portion 41. The radial extension portion 321 is formed by stamping and deforming the middle part of the top of the cover body 30 after the push rod 40 is installed, so that the radial extension portion 321 is formed inside to prevent the cover body 30 from popping out.

[0021] Furthermore, an arch-shaped notch is formed on one side edge of the top surface of the connecting head column 20, and a bow-shaped stopper 50 is inserted into the arch-shaped notch. An external tooth portion is formed on the arc-shaped outer wall of the stopper 50, and an internal tooth portion is formed on the inner wall of the middle through hole of the annular shell 10, and the internal tooth portion cooperates with the external tooth portion.

[0022] Furthermore, a heart-shaped spring member 2 is inserted into the upper portion of the upper column 23 , and the spring member 2 is located between the bottom surface of the circular protrusion 31 and the top surface of the connector column 20 .

[0023] The ends of the two heart-shaped arc portions of the spring member 2 are formed with downwardly extending vertical rod portions 3, which are inserted into the vertical through-hole formed in the middle of the block 50, and the side walls of the two vertical rod portions 3 on the sides away from each other are elastically pressed against the inner side walls of the corresponding vertical through-holes.

[0024] Furthermore, a swinging vertical column 330 extending downward is formed on the bottom surface of one end of the circular protrusion 31 of the cover body 30, and the swinging vertical column 330 is inserted into a through groove 9 formed on one side edge of the top surface of the connector column 20;

[0025] The swing vertical column 330 is inserted into the tip of the heart shape of the spring component 2 , and the swing vertical column 330 is clamped at the inner side walls on both sides of the tip of the heart shape of the spring component 2 .

[0026] Furthermore, the outer wall of the cover body 30 is a conical wall surface, and a tooth-shaped anti-slip portion is formed on the wall surface.

[0027] Furthermore, a side groove 42 is formed on one side wall of the lower part of the push rod 40, an inner groove 43 is formed on the upper inner wall of the side groove 42, and a side circular through hole is formed on the lower inner wall of the vertical center through hole 25 opposite to the side groove 42. The steel ball 4 is inserted into the side circular through hole, and the interior of the steel ball 4 is in the side groove 42. The inner end of the steel ball 4 is pressed against the inner wall surface of the side groove 42, and the outer end of the steel ball 4 extends out of the outer end of the side circular through hole. A radially extending raised ring is formed on the inner wall of the outer end of the side circular through hole (which is achieved by stamping and deforming the outer wall surface of the side circular through hole of the connecting head 22 in the later stage), and the side wall of the steel ball 4 is close to the inner wall of the raised ring, so that the steel ball 4 is not easy to fall out. This structure is a conventional structure and will not be described in detail here.

[0028] When in use, the circular portion 41 is manually pressed to push the bottom of the push rod 40 downward. At this time, the steel ball 4 is in the inner groove 43, and its outer end does not extend out of the side circular through hole. At this time, the sleeve can be mounted on the direction connector 22 for installation, and then the circular portion 41 is loosened, and the push rod 40 is retracted by the elastic recovery of the compression spring 1. At this time, the interior of the steel ball 4 is in the side groove 42, and the inner end of the steel ball 4 is pressed against the inner wall surface of the side groove 42. The outer end of the steel ball 4 extends out of the outer end of the side circular through hole and is clamped in the concave hole on the corresponding inner wall of the sleeve to achieve connection. At this time, the operation can be performed by rotating the annular shell 10;

[0029] Among them, by rotating the cover body 30, the spring part 2 can be driven to rotate by swinging the vertical column 330, which also drives the stopper 50 to move left and right, so that it can cooperate with the corresponding inner tooth part on the inner wall of the middle through hole of the annular shell 10, thereby changing the direction of rotation of the ratchet to meet the use requirements.

[0030] In this embodiment, the locking nut 26 and the compression spring 1 are used to firmly connect the annular shell 10, the connecting head column 20 and the cover body 30, which are not easy to be disassembled, thereby ensuring their normal use.

Claims

1. A palm-type ratchet wrench, characterized in that: It comprises a circular ring shell (10), a connecting head column (20) is inserted into a central through hole of the circular ring shell (10), a radially extending edge (21) is formed on the outer wall of the bottom end of the connecting head column (20), and the top surface of the radially extending edge (21) is in close contact with the bottom surface of the inner side of the circular ring shell (10); an upper column (23) extending upward is formed in the middle of the top surface of the connecting head column (20), and a connecting screw column (24) extending upward is formed in the middle of the top surface of the upper column (23); a cover body (30) is placed on the middle top surface of the circular ring shell (10), and a screw threaded connection column (24) extending upward is formed in the middle of the top surface of the upper column (23). A central concave hole (32) is formed with a lower through hole (33) in the middle of the bottom surface of the central concave hole (32), the upper column (23) is inserted into the lower through hole (33), the outer wall of the upper column (23) is close to the inner wall of the lower through hole (33), the top of the upper column (23) extends out of the top of the lower through hole (33), and the middle of the top surface of the connecting screw column (24) is formed with a vertical central through hole (25) extending vertically downward and extending out of the bottom end surface of the connecting head (22), the locking nut (26) is screwed on the external thread of the connecting screw column (24), and the bottom surface of the locking nut (26) is pressed against the top surface of the upper column (23).

2. A palm-type ratchet wrench according to claim 1, characterized in that: The bottom surface of the edge of the locking nut (26) is located above the bottom surface of the central recessed hole (32) around the lower through hole (33), and the push rod (40) is inserted into the central recessed hole (32) and the vertical central through hole (25). The top of the push rod (40) is formed with a circular portion (41), and the circular portion (41) is located in the central recessed hole (32). The outer wall of the circular portion (41) is close to the inner wall of the top of the central recessed hole (32). The upper part of the push rod (40) is inserted with a clamping spring (1), and the top end of the clamping spring (1) is applied to the bottom surface of the circular portion (41), and the bottom end of the clamping spring (1) is applied to the top surface of the locking nut (26).

3. A palm-type ratchet wrench according to claim 2, characterized in that: The top surface of the circular portion (41) is a spherical surface, and an annular groove is formed in the middle of the bottom surface of the circular portion (41). The upper part of the compression spring (1) is inserted into the annular groove, and the top end of the compression spring (1) is applied to the top surface of the annular groove. A radial extension portion (321) is formed on the inner side wall of the top end of the central recessed hole (32), and the bottom surface of the radial extension portion (321) is located above the edge of the top surface of the circular portion (41).

4. A palm-type ratchet wrench according to claim 2, characterized in that: An arch-shaped notch is formed on one side edge of the top surface of the connector column (20), and an arch-shaped stopper (50) is inserted into the arch-shaped notch. An outer arc-shaped wall of the stopper (50) is formed with an outer tooth portion, and an inner tooth portion is formed on the inner wall of the middle through hole of the annular shell (10), and the inner tooth portion matches the outer tooth portion.

5. A palm-type ratchet wrench according to claim 4, characterized in that: A heart-shaped spring member (2) is inserted into the upper part of the upper column (23), and the spring member (2) is located between the bottom surface of the circular protrusion (31) and the top surface of the connector column (20); A vertical rod portion (3) extending downward is formed at the ends of the two heart-shaped arc portions of the spring member (2), the vertical rod portion (3) is inserted into a vertical through hole formed in the middle of the stopper (50), and the side walls of the two vertical rod portions (3) on the sides away from each other are elastically pressed against the inner side walls of the corresponding vertical through holes.

6. A palm-type ratchet wrench according to claim 5, characterized in that: A downwardly extending swinging vertical column (330) is formed on the bottom surface of one end of the circular raised portion (31) of the cover body (30), and the swinging vertical column (330) is inserted into the tip of the heart shape of the spring component (2), and the swinging vertical column (330) is clamped on the inner side walls on both sides of the tip of the heart shape of the spring component (2).

7. A palm-type ratchet wrench according to claim 1, characterized in that: The outer wall of the cover body (30) is a conical wall surface, and a tooth-shaped anti-slip portion is formed on the wall surface.

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