A handle

Abstract

The present invention relates to the technical field of wrenches, and specifically to a handle, comprising: a ratchet seat; a ratchet; two pawls, the two pawls being arranged crosswise with each other; a support shaft, passing through the intersection of the two pawls, and the two pawls being rotatable relative to the support shaft; two torsion springs, both sleeved on the support shaft and corresponding to the two pawls respectively, for providing circumferential rotational force to the corresponding pawls, the directions of the circumferential rotational forces received by the two pawls being opposite; and a directional block, the top end of the directional block being swung leftward or rightward relative to the tail end thereof. The handle does not include a compression spring, and the ratchet seat and related components do not need to be provided with countersunk holes for accommodating springs. The ratchet seat can be die-cast or cast in one step without the need for milling operations, and assembly is quick and convenient, and parts are not easy to fall off. When the ratchet rotates, the reverse extrusion force received by the pawl is directly transmitted to the support shaft and does not act on the torsion spring. The torsion spring has a long service life, which effectively extends the service life of the handle.

Description

Technical Field

[0001] The present invention relates to the technical field of wrenches, and in particular to a handle. Background Art

[0002] A ratchet wrench is a manual screw tightening and loosening tool that allows the user to assist in tightening and loosening bolts or nuts. Most existing conventional ratchet wrenches require the use of a compression spring and a tooth block to restrict the one-way rotation of the ratchet, or a compression spring and a pawl to restrict the one-way rotation of the pawl. Due to the presence of the compression spring, a countersink for accommodating the compression spring needs to be provided on the inner side surface of the ratchet seat of the wrench or the side surface of the other parts of the handle, which makes it impossible for the ratchet seat or the parts to be die-cast or cast in one go. Milling processing is required after casting, which increases the production cost of the ratchet wrench to a certain extent. In addition, since the compression spring needs to be assembled into the countersink, and the compression spring needs to be compressed during assembly, resulting in the compression spring having a certain elastic force, the workpiece or hand needs to be used to compress the compression spring during assembly to prevent the compression spring from popping out and falling off. The assembly difficulty is relatively high, which to a certain extent restricts the improvement of the production efficiency of the ratchet wrench.

[0003] For example, the patent application number is 201721485804.0, and the name is a patent application for a D-head ratchet wrench and its wrench head. It is provided with a dial button 3, a slot 33, a tooth block 6 engaged with the ratchet, a spring block 7 and a recessed hole 71. The tooth block 6 is engaged with the ratchet, and the front end of the spring block 7 abuts against the back of the tooth block 6. A spring is provided in the recessed hole 71. The spring block 7 is provided in the slot 33 and the front end extends out of the slot 33 and abuts against the back of the tooth block. The front end swing of the spring block 7 is adjusted by controlling the swing of the dial button 3, thereby changing the abutment angle between the spring block 7 and the tooth block 6, so that the tooth block 6 is tilted, thereby completing the one-way rotation adjustment of the ratchet. This patent application provides two countersunk holes, the recessed hole 71 and the slot 33. The ratchet seat cannot be formed in one step, and two subsequent milling operations are required, which has a high processing cost. In actual use, when the ratchet is rotated, the tooth block 6 pushes the ratchet to rotate, and the interaction force generated between the tooth surface of the ratchet and the action surface of the tooth block 6 will be transmitted to the spring block 7 and squeeze the spring. After long-term use, the spring will become fatigued and the elastic force will weaken, resulting in the tooth block 6 and the ratchet not being engaged tightly enough and unable to drive the ratchet to rotate, and the wrench cannot be used normally. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a handle which does not include a compression spring, and the ratchet seat and related components do not need to be provided with a countersunk hole for accommodating the spring. The ratchet seat can be die-cast or cast in one step without the need for milling operations, and the assembly is quick and convenient, and the parts are not easy to fall off. When the ratchet rotates, the reverse extrusion force exerted on the pawl is directly transmitted to the support shaft and will not act on the torsion spring. The torsion spring has a long service life, which effectively extends the service life of the handle.

[0005] The object of the present invention is achieved through the following technical solution: A handle comprising:

[0006] The ratchet seat has an axial hole and a receiving groove formed therein, and the receiving groove is communicated with the side surface of the axial hole;

[0007] a ratchet, disposed in the shaft hole;

[0008] Two pawls are located below the ratchet wheel and are disposed in the receiving groove so as to cross each other;

[0009] A support shaft passes through the intersection of the two pawls in sequence, and the two pawls can rotate circumferentially relative to the support shaft;

[0010] Two torsion springs are sleeved on the support shaft and correspond to the two pawls respectively, for providing circumferential rotational force to the corresponding pawls, and the directions of the circumferential rotational forces exerted on the two pawls are opposite;

[0011] And a directional block is located below the support shaft, with a reversing protrusion on the top, abutment protrusions symmetrically arranged on both sides, and avoidance planes symmetrically arranged on both sides. The top end of the directional block can swing left or right relative to its tail end.

[0012] Wherein, the handle further includes:

[0013] A reversing shaft, one end of which is fixedly connected to the directional block and the other end of which extends out of the accommodating groove;

[0014] The reversing lever has one end fixedly connected to the other end of the reversing shaft and is used to drive the reversing shaft to rotate, thereby driving the directional block to swing.

[0015] Wherein, the handle further includes: a first limiting groove, which is opened on the outer side surface of the lower section of the pawl, one end of the torsion spring is arranged in the first limiting groove, and the other end of the torsion spring abuts against the side wall of the accommodating groove.

[0016] Wherein, the handle further includes: two second limiting grooves, which are symmetrically arranged relative to the support shaft and located above the support shaft, and the other end of the torsion spring is arranged in the corresponding second limiting groove.

[0017] Wherein, the handle further includes:

[0018] An arc-shaped groove is provided on the ratchet seat and is located below the directional block, with a notch provided in the middle section;

[0019] The spring piece has an arc-shaped protrusion in the middle, which is arranged in the arc-shaped groove, and the arc-shaped protrusion passes through the notch and extends into the receiving groove;

[0020] And three arc-shaped concave surfaces, one of which is arranged on the lower end surface of the directional block, and the remaining two arc-shaped concave surfaces are respectively arranged at the two corners of the lower end of the directional block, and one of the arc-shaped concave surfaces is matched with the arc-shaped protrusion.

[0021] Wherein, the handle further includes: a cover plate for covering the accommodating groove and the shaft hole.

[0022] Wherein, the handle further comprises: a step, which is arranged at the periphery of the opening end of the accommodating groove and the shaft hole, and the periphery of the cover plate is arranged in the step and fixed to the ratchet seat by screws.

[0023] Wherein, the handle further includes:

[0024] A connector, fixed to one end of the ratchet and extending out of the cover plate, with a hexagonal countersunk hole formed at the end of the connector;

[0025] The connecting shaft is fixed to the other end of the ratchet.

[0026] Wherein, the support shaft is a bolt, which passes through the two pawls in sequence and is screwed to the ratchet seat.

[0027] Wherein, the handle further comprises: a hand-holding portion, an end of which is fixedly connected to the end of the ratchet seat, and the hand-holding portion and the ratchet seat form an angle of 10-30 degrees.

[0028] The beneficial effects of the present invention are:

[0029] The directional block swings rightward, the abutment protrusion separates from the two pawls, and the reversing protrusion abuts the tail end of one of the pawls, driving the upper end of the pawl to swing downward, moving the pawl away from the ratchet. The tail end of the other pawl separates from the abutment protrusion and swings downward a short distance before abutting against the avoidance plane on the left side of the directional block. The upper end of the pawl swings upward and engages with the teeth of the ratchet, driving the ratchet to rotate counterclockwise. When the directional block swings back to its initial position, both pawls are separated from the ratchet, and the ratchet cannot be driven to rotate. Conversely, driving the directional block to swing leftward can drive the ratchet to rotate clockwise.

[0030] In the process of driving the ratchet to rotate in the present application, the upper end of the pawl abuts against the tooth surface of the ratchet, and the upper end of the pawl squeezes and pushes the ratchet to rotate. The pawl is subjected to the extrusion force of the reverse action of the ratchet, and the extrusion force is directly transmitted to the support shaft. This force will not act on the torsion spring and cause the torsion spring to fatigue prematurely. The torsion spring only needs to provide the pawl with elastic force for circumferential rotation. It has low working intensity and long service life. It overcomes the defect of the existing patent application 201721485804.0 that the reverse extrusion force for driving the ratchet to rotate acts on the spring, which easily causes spring fatigue and causes the wrench to be unable to continue to be used, greatly reducing the service life of the wrench. At the same time, the ratchet seat of the present application does not need to be provided with a countersink for accommodating the spring perpendicular to the shaft hole. It can be die-cast or cast in one time, and no milling is required subsequently. The parts of the patent application 201721485804.0 require milling operations to open two countersinks, which increases the process and is costly. Moreover, the assembly of the components of the handle of this application is more convenient and quick, and the assembly work can be completed quickly by hand. Patent application 201721485804.0 requires compression of the compression spring during assembly, which causes the compression spring to have a certain elastic force. During assembly, it is necessary to use a workpiece or hand to compress the compression spring to prevent the compression spring from popping out and falling. The assembly difficulty is relatively high, which to a certain extent restricts the improvement of the production efficiency of the ratchet wrench. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a perspective view of the present invention;

[0032] Figure 2 It is an exploded schematic diagram of the present invention;

[0033] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0034] Figure 4 It is a perspective view of the orientation block of the present invention.

[0035] The accompanying drawings are marked as: ratchet seat 1, shaft hole 2, accommodating groove 3, ratchet 4, pawl 5, support shaft 6, torsion spring 7, directional block 8, reversing protrusion 9, abutment protrusion 10, avoidance plane 11, reversing shaft 12, reversing lever 13, first limiting groove 14, second limiting groove 15, arc groove 16, arc-shaped concave surface 17, cover plate 18, step 19, screw 20, connecting head 21, connecting shaft 22, hand-held part 23, spring piece 24, arc-shaped protrusion 25. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of those skilled in the art, the following embodiments and accompanying drawings are provided. Figure 1 Figure 4 To further illustrate the present invention, the contents mentioned in the embodiment are not intended to limit the present invention.

[0037] A handle, comprising:

[0038] The ratchet seat 1 has an axial hole 2 and a receiving groove 3 formed therein, and the receiving groove 3 is communicated with the side of the axial hole 2;

[0039] The ratchet 4 is arranged in the shaft hole 2;

[0040] Two pawls 5 are located below the ratchet wheel 4 and are disposed in the receiving groove 3 so as to cross each other.

[0041] The support shaft 6 passes through the intersection of the two pawls 5 in sequence, and the two pawls 5 can rotate circumferentially relative to the support shaft 6;

[0042] Two torsion springs 7 are both sleeved on the support shaft 6 and correspond to the two pawls 5 respectively, for providing circumferential rotational force to the corresponding pawls 5, and the directions of the circumferential rotational forces exerted on the two pawls 5 are opposite;

[0043] And the orientation block 8 is located below the support shaft 6, with a reversing protrusion 9 protruding from the top, abutment protrusions 10 symmetrically arranged on both sides, and avoidance planes 11 symmetrically arranged on both sides. The top end of the orientation block 8 can swing left or right relative to its tail end.

[0044] The directional block 8 swings rightward, the abutting protrusion 10 separates from the pawl 5, and the reversing protrusion 9 abuts against the tail end of one of the pawls 5, driving the upper end of the pawl 5 to swing downward, so that the pawl 5 moves away from the ratchet 4. The tail end of the other pawl 5 separates from the abutting protrusion 10 and then swings downward a short distance before abutting against the avoidance plane 11 located on the left side of the directional block 8. The upper end of the pawl 5 swings upward and engages with the tooth surface of the ratchet 4, at which point the ratchet 4 can be driven to rotate counterclockwise. When the directional block 8 swings back to its initial position, both pawls 5 are separated from the ratchet 4, and the ratchet 4 cannot be driven to rotate. Conversely, driving the directional block 8 to swing leftward can drive the ratchet 4 to rotate clockwise.

[0045] During the process of driving the ratchet 4 to rotate in the present application, the upper end of the pawl 5 abuts against the tooth surface of the ratchet 4, and the upper end of the pawl 5 squeezes and pushes the ratchet 4 to rotate. The pawl 5 is subjected to the extrusion force of the reverse action of the ratchet 4 and directly transmits the extrusion force to the support shaft 6. This force will not act on the torsion spring 7 and cause the torsion spring 7 to prematurely fatigue. The torsion spring 7 only needs to provide the pawl 5 with elastic force for circumferential rotation. It has low working intensity and long service life. It overcomes the defect of the existing patent application 201721485804.0 that the reverse extrusion force for driving the ratchet 4 to rotate acts on the spring, which easily causes spring fatigue and makes the wrench unusable, greatly reducing the service life of the wrench. At the same time, the ratchet seat 1 of the present application does not need to be provided with a countersink for accommodating the spring, which is arranged perpendicular to the shaft hole 2. It can be die-cast or cast in one step, and no milling is required subsequently. The parts of the patent application 201721485804.0 require milling operations to open two countersinks, which increases the process and is costly. Moreover, the assembly of the components of the handle of this application is more convenient and quick, and the assembly work can be completed quickly by hand. Patent application 201721485804.0 requires compression of the compression spring during assembly, which causes the compression spring to have a certain elastic force. During assembly, it is necessary to use a workpiece or hand to compress the compression spring to prevent the compression spring from popping out and falling. The assembly difficulty is relatively high, which to a certain extent restricts the improvement of the production efficiency of the ratchet 4 wrench.

[0046] Specifically, the upper end of the pawl 5 is engaged with the tooth structure of the ratchet wheel 4 .

[0047] Wherein, the handle further includes:

[0048] A reversing shaft 12, one end of which is fixedly connected to the orientation block 8 and the other end of which extends out of the receiving groove 3;

[0049] The reversing lever 13 has one end fixedly connected to the other end of the reversing shaft 12 and is used to drive the reversing shaft 12 to rotate, thereby driving the directional block 8 to swing.

[0050] Specifically, the reversing shaft 12 passes through the cover plate 18 and extends out of the ratchet seat 1 to be fixedly connected to one end of the reversing lever 13 .

[0051] The handle further includes a first limiting groove 14 formed on the outer side of the lower section of the pawl 5 , one end of the torsion spring 7 is disposed in the first limiting groove 14 , and the other end of the torsion spring 7 abuts against the side wall of the accommodating groove 3 .

[0052] The handle further includes two second limiting grooves 15 symmetrically arranged relative to the support shaft 6 and located above the support shaft 6 , and the other end of the torsion spring 7 is arranged in the corresponding second limiting groove 15 .

[0053] Specifically, the second limiting groove 15 is a V-shaped groove, and the two ends of the torsion spring 7 are fixed by the first limiting groove 14 and the second limiting groove 15, so that the torsion spring 7 has good stability and is not easy to loosen.

[0054] Wherein, the handle further includes:

[0055] An arc-shaped groove 16 is provided on the ratchet seat 1 and is located below the directional block 8, with a notch provided in the middle section;

[0056] The spring piece 24 has an arc-shaped protrusion 25 in the middle, which is arranged in the arc-shaped groove 16. The arc-shaped protrusion 25 passes through the notch and extends into the receiving groove 3;

[0057] And three arc-shaped concave surfaces 17, one of which is arranged on the lower end surface of the orientation block 8, and the remaining two arc-shaped concave surfaces 17 are respectively arranged at the two corners of the lower end of the orientation block 8, and one of which is cooperated with the arc-shaped protrusion 25.

[0058] Specifically, when the directional block 8 swings, the arc-shaped protrusion 25 of the spring piece 24 is compressed and deformed and shrinks downward. After the arc-shaped protrusion 25 is separated from the arc-shaped concave surface 17 located on the lower end surface of the directional block 8, the arc-shaped protrusion 25 rebounds and is stuck in the arc-shaped concave surface 17 located on the side. The structural design of the spring piece 24 cooperating with the arc-shaped protrusion 25 has a large downward deformation of the spring piece 24 and the arc-shaped protrusion 25, making the movement of the reversing lever 13 smoother.

[0059] The handle further comprises a cover plate 18 for covering the receiving groove 3 and the shaft hole 2. The provision of the cover plate 18 enables the shaft hole 2 and the receiving groove 3 to maintain a good sealed structure, preventing dust from entering and causing increased wear on the tooth surface of the ratchet 4.

[0060] The handle further includes a step 19 disposed on the periphery of the opening end of the receiving groove 3 and the shaft hole 2. The periphery of the cover plate 18 is disposed within the step 19 and is fixed to the ratchet seat 1 by screws 20. The step 19 can effectively limit and position the cover plate 18, facilitating rapid positioning and assembly of the cover plate 18.

[0061] Wherein, the handle further includes:

[0062] A connector 21 is fixed to one end of the ratchet 4 and extends out of the cover 18. A hexagonal countersunk hole is formed at the end of the connector 21.

[0063] The connecting shaft 22 is fixed to the other end of the ratchet 4 .

[0064] The support shaft 6 is a bolt, which passes through the two pawls 5 in sequence and is screwed to the ratchet seat 1.

[0065] The handle further comprises a grip portion 23, the end of which is fixedly connected to the end of the ratchet base 1, and the grip portion 23 forms an angle of 10-30 degrees with the ratchet base 1. This angle increases the distance between the grip portion 23 and the twisted component, increasing the space for the human hand to move, and making the handle of the present application more convenient to use and operate.

[0066] Preferably, the hand-held portion 23 forms an angle of 15° with the ratchet seat 1 .

[0067] In the actual assembly process of the present invention, the two torsion springs 7 are respectively assembled to the two pawls 5, one end of the torsion spring 7 is inserted into the first limiting groove 14, the support shaft 6, that is, the bolt passes through the two pawls 5 and the torsion spring 7 in sequence, and then the two pawls 5 are placed in the receiving groove 3 and the other end of the torsion spring 7 is placed in the second limiting groove 15. The bolt is screwed to the ratchet seat 1 to complete the fixation of the pawl 5, the ratchet 4 is placed in the shaft hole 2, and the directional block 8 is placed. Due to the existence of the force of the torsion spring 7, the lower sections of the two pawls 5 are clamped. Hold both sides of the directional block 8, the inner side of the pawl 5 abuts against the abutting protrusion 10, and then insert the spring piece 24 into the arc groove 16. The arc protrusion 25 of the spring piece 24 passes through the notch and is snapped into the arc concave surface 17 on the lower end face of the directional block 8, completing the limitation of the directional block 8. The directional block 8 will not swing to the left or right. After the cover is placed into the step 19 cover plate 18, the reversing lever 13 is fixed to the reversing shaft 12. At this time, the upper ends of the two pawls 5 are separated from the tooth surface of the ratchet 4. The reversing lever 13 drives the directional block 8 to swing rightward, the abutting protrusion 10 separates from the pawl 5, and the reversing protrusion 9 abuts against the tail end of one of the pawls 5, driving the upper end of the pawl 5 to swing downward, so that the pawl 5 moves away from the ratchet 4. The tail end of the other pawl 5 separates from the abutting protrusion 10 and then swings downward a short distance before abutting against the avoidance plane 11 located on the left side of the directional block 8. The upper end of the pawl 5 swings upward and engages with the tooth surface of the ratchet 4, at which point the ratchet 4 can be driven to rotate counterclockwise. When the directional block 8 swings back to its initial position, both pawls 5 are separated from the ratchet 4, and the ratchet 4 cannot be driven to rotate. Conversely, driving the directional block 8 to swing leftward can drive the ratchet 4 to rotate clockwise.

[0068] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the scope of protection of the present invention.

Claims

1. A handle, characterized in that: include: The ratchet seat (1) is provided with an axial hole (2) and a receiving groove (3) therein, and the receiving groove (3) is communicated with the side surface of the axial hole (2); A ratchet (4) is disposed in the shaft hole (2); Two pawls (5) are located below the ratchet wheel (4), are arranged in the receiving groove (3), and the two pawls (5) are arranged crosswise with each other; A support shaft (6) passes through the intersection of the two ratchet pawls (5) in sequence, and the two ratchet pawls (5) can rotate circumferentially relative to the support shaft (6); Two torsion springs (7) are both sleeved on the support shaft (6) and correspond to the two pawls (5) respectively, and are used to provide circumferential rotational force for the corresponding pawls (5), and the directions of the circumferential rotational forces received by the two pawls (5) are opposite; and a directional block (8) located below the support shaft (6), with a reversing protrusion (9) protruding from the top, abutment protrusions (10) symmetrically arranged on both sides, and avoidance planes (11) symmetrically arranged on both sides, and the top end of the directional block (8) can swing leftward or rightward relative to the tail end thereof; In which, during the rotation of the ratchet, the upper end of the pawl abuts against the tooth surface of the ratchet, the upper end of the pawl squeezes and pushes the ratchet to rotate, the pawl is subjected to the extrusion force of the reverse action of the ratchet, and directly transmits the extrusion force to the support shaft.

2. A handle according to claim 1, characterized in that: The handle further comprises: A reversing shaft (12), one end of which is fixedly connected to the orientation block (8) and the other end of which extends out of the accommodation groove (3); The reversing lever (13) has an end fixedly connected to the other end of the reversing shaft (12) and is used to drive the reversing shaft (12) to rotate, thereby driving the directional block (8) to swing.

3. The handle according to claim 1, characterized in that: The handle further comprises: a first limiting groove (14) which is provided on the outer side surface of the lower section of the pawl (5); one end of the torsion spring (7) is arranged in the first limiting groove (14); and the other end of the torsion spring (7) abuts against the side wall of the accommodating groove (3).

4. A handle according to claim 3, characterized in that: The handle further comprises: two second limiting grooves (15) symmetrically arranged relative to the support shaft (6) and located above the support shaft (6), and the other end of the torsion spring (7) is arranged in the corresponding second limiting groove (15).

5. The handle according to claim 1, characterized in that: The handle further comprises: An arc-shaped groove (16) is provided on the ratchet seat (1) and is located below the directional block (8), with a notch provided in the middle section; The spring piece (24) is provided with an arc-shaped protrusion (25) in the middle, which is arranged in the arc-shaped groove (16), and the arc-shaped protrusion (25) passes through the notch and extends into the accommodating groove (3); and three arc-shaped concave surfaces (17), one of which is arranged on the lower end surface of the orientation block (8), and the remaining two arc-shaped concave surfaces (17) are respectively arranged at two corners of the lower end of the orientation block (8), and one of which is matched with the arc-shaped protrusion.

6. The handle according to claim 1, characterized in that: The handle further comprises a cover plate (18) for covering the accommodating groove (3) and the shaft hole (2).

7. A handle according to claim 6, characterized in that: The handle further comprises: a step (19) provided at the periphery of the opening end of the receiving groove (3) and the shaft hole (2); the periphery of the cover plate (18) is provided in the step (19) and is fixed to the ratchet seat (1) by screws (20).

8. The handle according to claim 6, characterized in that: The handle further comprises: A connector (21) is fixed to one end of the ratchet (4) and extends out of the cover plate (18), and a hexagonal countersunk hole is formed at the end of the connector (21); A connecting shaft (22) is fixed to the other end of the ratchet (4).

9. The handle according to claim 1, characterized in that: The support shaft (6) is a bolt, which passes through the two ratchet pawls (5) in sequence and is then screwed to the ratchet seat (1).

10. The handle according to claim 1, characterized in that: The handle further comprises a hand-held portion (23), an end of which is fixedly connected to the end of the ratchet seat (1), and the hand-held portion (23) and the ratchet seat (1) form an angle of 10-30 degrees.

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