CN102398245A - Ratchet screwdriver reversing device - Google Patents

Abstract

A ratchet screwdriver reversing device comprises a wheel placing seat and a ratchet rod, wherein: the wheel placing seat is arranged at the front end of the ratchet screwdriver, the wheel placing seat is provided with a containing hole, two sides of the containing hole are connected with symmetrical containing grooves, the containing hole is connected with a movable groove between the two containing grooves, a clamping block is arranged in each containing groove, one side of each clamping block is provided with a unidirectional clamping tooth, and the opposite side of each clamping block is abutted against the wall surface of the containing groove by a spring; the ratchet rod is provided with a ratchet wheel in a rod body ring, the front end of the rod body is provided with a slot for inserting a screwdriver head, and the ratchet wheel is arranged in the accommodating hole and meshed with the clamping teeth of the clamping block by a ratchet; the wheel seat is sleeved with a cover cap, the cover cap is provided with a cap hole for the rod body to penetrate through, the inner side of the cover cap is provided with a resisting block corresponding to the movable groove, and the resisting block extends into the movable groove along with the wheel seat sleeved with the cover cap to rotate the cover cap relative to the wheel seat. The invention improves the convenience of production, effectively reduces abrasion, increases the smoothness of the advance and retreat of the clamping block and saves the material cost of the wheel seat.

Description

Ratchet driver reversing device

technical field

The invention relates to a blocking block inside the cover, which can push and engage the locking blocks on both sides of the ratchet wheel when the cover rotates relative to the ratchet seat, and use the retraction or engagement of the locking blocks to switch the pulling direction of the screwdriver device, in particular to a ratchet screwdriver reversing device.

Background technique

Present ratchet screwdriver is like Chinese Taiwan Patent Certificate No. M255766 "Structure Improvement of Screwdriver". The grooves are connected, and the two accommodation grooves form an included angle with each other, each accommodation groove has two parallel sides, and a retainer groove is arranged at the front end of the accommodation hole;

The first ratchet is provided with a ring tooth, and the ring tooth of the ratchet can be accommodated in the accommodating hole; the second tooth forms a locking tooth on one side that can engage with the ring tooth, and a protrusion protrudes from the top of the tooth. The side other than the clamping teeth has a clamping end;

The two elastic bodies can be fitted on the card ends of the two teeth respectively, and the two teeth and the two elastic bodies are accommodated in the two accommodating grooves. A groove is provided, and a bump is protruded on the groove; a block can be accommodated in the block groove of the body, and the ratchet and the second tooth are restricted by the block and cannot fall out of the body;

When the ratchet driver operates, the upper cover is rotated to a certain angle (for example, rotated to the right), and the right side of the projection is against the projection of the right tooth, so that the locking tooth of the right tooth is separated from the ring tooth of the ratchet When the body is rotated clockwise, the left gear can engage the ratchet to produce a pulling effect, and when the body is rotated counterclockwise, the left gear will jump relative to the ratchet, and the body will return to the original rotation position. Rotating the body clockwise and counterclockwise can achieve the effect of reciprocating pulling.

The effect of switching the pulling direction of the aforementioned ratchet driver is that the protrusion of the upper cover is forced to resist the protrusion of the tooth, so that the tooth against which the protrusion is pressed is pushed away from the ratchet due to the rotation of the upper cover, but the tooth In production, the bumps on it need to be formed through additional processing, and in use, the bumps of the teeth are thin and small in size, so the structure is relatively poor. The wear is damaged due to the pushing of the ratchet screwdriver, and even the ratchet screwdriver loses the function of switching the pulling direction.

In view of the fact that the lugs of this kind of ratchet driver have the disadvantages of additional processing, inconvenient production, fragile structure, and easy wear and tear, the inventor decided to improve it.

Contents of the invention

The main technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art, and provide a ratchet screwdriver reversing device, which improves the convenience of production, effectively reduces wear and tear, and can keep the function of the ratchet screwdriver to switch the pulling direction for a long time. Normally, the smoothness of advancing and retreating of the locking block is increased, and the material cost of the wheel seat can be saved.

The technical solution adopted by the present invention to solve its technical problems is:

A ratchet screwdriver reversing device, characterized in that it includes a wheel base and a ratchet lever, wherein: the wheel base is arranged at the front end of the ratchet screwdriver, the wheel base is provided with a housing hole, the housing hole has two The side is connected with symmetrical accommodating grooves, and the accommodating hole is connected with a movable groove between the two accommodating grooves. Each accommodating groove is provided with a catch block, and each catch block has a one-way catch on one side. teeth, and a spring on the opposite side against the wall of the accommodating groove; the ratchet lever is provided with a ratchet gear on a rod body ring, and the front end of the rod body has a slot for inserting the screwdriver head, and the ratchet gear is inserted into the accommodating hole and The ratchets are engaged with the locking teeth of the locking block; a cover is sheathed on the wheel seat, and the cover has a cover hole for the rod body to pass through, and a block is provided on the inner side of the cover corresponding to the position of the movable groove. The block is extended into the movable groove along with the wheel base set on the cover sleeve, and the cover is rotated relative to the wheel seat, so that the block moves in the movable groove and pushes against one of the locking blocks to retreat from the ratchet gear, and the other The meshing or jumping between the locking block and the ratchet gear achieves the function of pulling the workpiece.

In the aforementioned ratchet screwdriver reversing device, a hole is provided above the wall where the accommodating hole is located, and a positioning unit is provided in the seat hole, and the positioning unit is an elastic member and a ball; the inner side of the cover corresponds to the seat hole Three positioning holes are arranged in a row, and the positioning unit uses a ball embedded in one of the positioning holes, and switches to the corresponding other positioning hole as the cover rotates relative to the wheel base.

In the aforementioned ratchet screwdriver reversing device, a housing frame corresponding to the inner contour is provided in the housing hole and the housing groove on the surrounding side, the ratchet gear is placed at the corresponding housing hole of the housing frame, and each locking block is placed The holding frame corresponds to each holding groove, and the holding frame and the wheel seat are respectively made of metals of different materials, and the material hardness of the holding frame is greater than that of the wheel seat.

In the aforementioned ratchet screwdriver reversing device, a set of columns protrudes from the corresponding side of each locking block and each spring, and the corresponding springs are socketed with the sleeves. Sliding surface and a guiding surface, the sliding surface is in contact with the inner wall of the accommodating groove, and the guiding surface is used to contact the abutting block; moreover, the cover is cut with at least one groove on the periphery of the inner wall, the The groove width of the groove is equal to the sum of the pitches of the three positioning holes, and the wheel base is provided with a retaining rib at the position corresponding to the groove. Abut against one side of the groove, thereby limiting the rotation range of the cover.

The present invention solves its technical problem and also can adopt following technical scheme:

A ratchet screwdriver reversing device, characterized in that it includes a wheel base and a ratchet lever, wherein: the wheel base is set at the front end of the ratchet driver, and the wheel base is provided with a housing hole, and the housing hole is Both sides of the half are connected with symmetrical first and second accommodating grooves, and both sides of the lower half are connected with symmetrical third and fourth accommodating grooves. There is a movable groove connected between the storage tank and the third and fourth storage tanks, and there is a partition wall between the first and third storage tanks and the second and fourth storage tanks. One locking block, each locking block has one-way locking teeth on one side, and a spring on the opposite side against the wall of the accommodating groove; Insert the slot of the screwdriver head, the ratchet gear is inserted into the accommodating hole and meshes with the locking teeth of the locking block with the ratchet teeth; a cover is set on the wheel base, and the cover is provided with a hole for the rod body to pass through. Cover hole, the inner side of the cover is provided with a block corresponding to the position of each movable groove, and each block extends into the corresponding movable groove with the wheel seat set on the cover sleeve, and the cover is rotated relative to the wheel seat, so that the block Displace in the movable groove and push against one of the two corners of the catch block to withdraw from the ratchet gear, and the other corner of the catch block and the ratchet gear mesh or jump to achieve the function of pulling the workpiece.

In the aforementioned ratchet screwdriver reversing device, a hole is provided above the wall where the accommodating hole is located, and a positioning unit is provided in the seat hole, and the positioning unit is an elastic member and a ball; the inner side of the cover corresponds to the seat hole Three positioning holes are arranged in a row, and the positioning unit uses a ball embedded in one of the positioning holes, and switches to the corresponding other positioning hole as the cover rotates relative to the wheel base.

In the aforementioned ratchet screwdriver reversing device, a housing frame corresponding to the inner contour is provided in the housing hole and the housing groove on the surrounding side, the ratchet gear is placed at the corresponding housing hole of the housing frame, and each locking block is placed The container frame corresponds to each container slot, and the retaining wall separating the container slots is also formed on the container frame. The container frame and the wheel seat are made of different metal materials, and the material hardness of the container frame is greater than that of the wheel seat. .

In the aforementioned ratchet screwdriver reversing device, a set of columns protrudes from the corresponding side of each locking block and each spring, and the corresponding springs are socketed with the sleeves. A sliding surface and a guiding surface, the sliding surface is in contact with the inner wall of the accommodating groove, and the guiding surface is used to contact with the abutting block; moreover, the cover is provided with at least one groove on the periphery of the inner wall , the groove width of the groove is equal to the sum of the pitches of the three positioning holes, and the position of the wheel seat corresponding to the groove is provided with a retaining rib, which is located in the groove and is opposite to the wheel with the cover. The seat rotates against one side of the groove, thereby limiting the rotation range of the cover.

The present invention is characterized in that:

1. The guide surface is formed by the locking block corresponding to the side of the cover block to replace the existing tooth-making protrusions, which not only saves the trouble of additional processing and molding, but also improves the convenience of production.

2. Utilize the large-area guide surface contact between the blocking block and the locking block, both of which have high structural strength to withstand the pushing force, effectively reduce wear and tear, and ensure the normal function of the ratchet screwdriver to switch the pulling direction for a long time.

3. The sliding surface of the locking block located on the other side of the locking teeth can fit and slide with the inner wall of the accommodating groove when the locking block retreats or returns to mesh with the ratchet gear, which increases the smoothness of the moving and retreating of the locking block.

4. Use the container frame with the advantage of material hardness to withstand the friction between the ratchet gear and the locking block when rotating or moving, and can save the material cost of the wheel seat.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a three-dimensional exploded schematic view of the first structure of the ratchet driver reversing device of the present invention.

Fig. 2 is a sectional view of a partial structure after the combination of the first structural form is completed.

Fig. 3 is a schematic front sectional view of the wheel seat, the ratchet lever and the cover in the first structural aspect.

Fig. 4 is a schematic cross-sectional view of the positioning hole, the groove, the seat hole and the positioning unit of the first structural aspect.

FIG. 5 and FIG. 6 are cross-sectional schematic diagrams of the combination relationship of various components when the pulling direction is switched in the first structural aspect.

Fig. 7 is a schematic front sectional view of the wheel seat, the ratchet lever and the cover in the second structural aspect of the present invention.

Fig. 8 and Fig. 9 are cross-sectional schematic diagrams of the combination relationship of various components when the pulling direction is switched in the second structural aspect.

FIG. 10 and FIG. 11 are structural cross-sectional schematic diagrams of the first and second structural aspects in which the housing frame is disposed in the housing hole and the housing groove.

Explanation of symbols in the figure:

1 Wheel seat 10 Accommodating holes 11 Accommodating slots

11A First Storage Tank 11B Second Storage Tank 11C Third Storage Tank

11D fourth storage slot 12 movable slot 13 locking block

131 Detent tooth 132 Set column 133 Sliding surface

134 guide surface 14 spring 15 seat hole

16 positioning unit 161 elastic piece 162 ball

17 retaining rib 18 retaining wall 19 container frame

2 ratchet lever 20 rod body 21 ratchet gear

211 ratchets 22 slots 3 covers

30 Cover hole 31 Arrest block 32 Positioning hole

33 grooves

Detailed ways

The present invention relates to a reversing device for a ratchet screwdriver. Please refer to Fig. 1 to Fig. 4, which are the embodiment diagrams of the first structural form of the present invention. In this structural form, a set wheel is included. Seat 1 and a ratchet lever 2, wherein:

This set wheel base 1 is arranged on the front end of the ratchet screwdriver, and this set wheel base 1 offers an accommodation hole 10, and this accommodation hole 10 both sides are to be connected with symmetrical accommodation groove 11, and this accommodation hole 10 is in the two accommodations. A movable slot 12 is connected between the slots 11, and a locking block 13 is arranged in each receiving slot 11. One side of each locking block 13 has a one-way locking tooth 131, and a spring 14 is used to hold the container on the opposite side. On the wall surface of the groove 11, a set of posts 132 protrudes from the side corresponding to each of the locking blocks 13 and each spring 14, and the corresponding springs 14 are socketed with the sets of posts 132;

The ratchet lever 2 is provided with a ratchet gear 21 around a rod body 20, and the front end of the rod body 20 is provided with a slot 22 for inserting a screwdriver head. 13 engages with the locking teeth 131;

The wheel base 1 is sleeved with a cover 3, and the cover 3 is provided with a cover hole 30 for the rod body 20 to pass through. The inner side of the cover 3 is provided with a block 31 corresponding to the position of the movable groove 12, and the block 31 follows the The cover cover 3 sets the wheel seat 1 and stretches into the movable groove 12, and the locking block 13 forms a sliding surface 133 and a guiding surface 134 on both sides of the locking tooth 131, and the sliding surface 133 is in contact with the sliding surface 133. The inner wall of the accommodating groove 11 is abutted against, and the guide surface 134 is used for contacting with the abutting block 31 ;

Again, this set wheel base 1 offers a hole 15 above the wall where the accommodation hole 10 is located, and this seat hole 15 is provided with a positioning unit 16, and the positioning unit 16 is an elastic member 161 and a ball 162, the cover 3 Three positioning holes 32 are arranged on the inner side corresponding to the position of the seat hole 15. The positioning unit 16 is embedded with a ball 162 in one of the positioning holes 32, and switches to the corresponding other positioning hole 32 as the cover 3 rotates relative to the wheel base 1. , when the direction of the ratchet driver is not switched, the ball 162 is located in the central positioning hole 32 as shown in Figure 4, and the cover 3 is provided with at least one groove 33 on the periphery of the inner wall. At the sum of the pitches of the three positioning holes 32, the wheel base 1 is provided with a retaining rib 17 at the position corresponding to the groove 33, and the retaining rib 17 is located in the groove 33, and is opposite to the wheel base with the cover 3 1 rotates against one side of the groove 33, thereby limiting the rotation range of the cover 3. When the ratchet driver is not switched, the blocking rib 17 is located in the middle of the groove 33.

When the present invention wants to switch the ratchet screwdriver pulling direction, the cover 3 is rotated relative to the wheel base 1, so that the blocking block 31 is displaced in the movable groove 12 and pushes against one of the locking blocks 13 to retreat from the ratchet gear 21. The function of pulling the workpiece can be achieved by the engagement or jumping of another locking block 13 and the ratchet gear 21. Please refer to Figure 5 and Figure 6. When the cover 3 is opposite to the wheel base 1 and rotates counterclockwise (as shown in 5 outside arrow), the block 31 is against the guide surface 134 of the locking block 13 of the right side accommodation groove 11 of the wheel seat 1, thereby pushing it away from the ratchet gear 21, and the ball 162 of the positioning unit 16 Insert the positioning hole 32 on the left side of the inner side of the cover 3 as shown in Figure 6, the rib 17 stops on the left side of the groove 33 to prevent the cover 3 from exceeding the normal rotation range, and the wheel base 1 is accommodated on the left side The locking block 13 of the groove 11 meshes with the ratchet gear 21, so that the ratchet screwdriver can be rotated clockwise to pull the workpiece (as shown by the inner arrow in Figure 5), and when it rotates in the reverse direction, the locking block 13 of the left accommodation groove 11 Relative to the ratchet gear 21 jump and reset.

Please refer to Figure 7 for continued reference. These figures are the embodiment diagrams of the second structural aspect of the present invention. The components and component combination relationship of this structural aspect are the same as those of the first structural aspect, and will not be described in detail here. Just to illustrate the differences:

The wheel base 1 is provided with an accommodating hole 10, the two sides of the upper half of the accommodating hole 10 are connected with symmetrical first and second accommodating grooves 11A, 11B, and the two sides of the lower half are connected with symmetrical The third and fourth accommodating grooves 11C and 11D, the accommodating holes 10 are respectively connected with a movable groove 12 between the first and second accommodating grooves 11A and 11B and the third and fourth accommodating grooves 11C and 11D, Each of the first and third accommodating grooves 11A, 11B and the second and fourth accommodating grooves 11C, 11D has a separate retaining wall 18. Extended molding, each of the accommodating grooves 11A, 11B, 11C, 11D is provided with a locking block 13, each side of the locking block 13 has a one-way locking tooth 131, and the opposite side is supported by a spring 14 Live on the wall surface of the accommodation tank 11;

The ratchet lever 2 is provided with a ratchet gear 21 around a rod body 20, and the front end of the rod body 20 has a slot 22 for inserting a screwdriver head. Engage with the locking teeth 131 of the block 13;

The wheel base 1 is sleeved with a cover 3, the cover 3 has a cover hole 30 for the rod body 20 to pass through, and the inner side of the cover 3 is respectively provided with a block 31 corresponding to each movable groove 12, each block 31 The wheel seat 1 is provided with 3 sets of covers and extends into the corresponding movable groove 12;

In the second structural aspect, the cover 3 is rotated relative to the wheel base 1, so that the blocking block 31 is displaced in the movable groove 12 and pushed against one pair of corners. The locking block 13 retreats from the ratchet gear 21, and the other diagonal The meshing or jumping of the locking block 13 and the ratchet gear 21 can achieve the function of pulling the workpiece. Please cooperate with Fig. 8 and Fig. 9, when the cover 3 is opposite to the wheel seat 1 and rotates clockwise (as shown by the outer arrow in Fig. 8 ), the two abutting blocks 31 are respectively against the engaging blocks 13 in the second accommodating groove 11B of the second accommodating groove 11B of the accommodating hole 10 of the wheel seat 1 and the third accommodating groove 11C on the opposite corner, thereby pushing it away from the ratchet gear 21 , the ball 162 of the positioning unit 16 is embedded in the positioning hole 32 on the right side of the cover 3 as shown in Figure 9, and the retaining rib 17 stops on the right side of the groove 33 to prevent the cover 3 from exceeding the normal rotation range, and the The wheel base 1 is engaged with the ratchet gear 21 by the catch block 13 of the first accommodation groove 11A and the diagonally fourth accommodation groove 11D, so that the ratchet driver can rotate counterclockwise to pull the workpiece (as shown by the inner arrow in Figure 8) , and reset due to the jumping of the locking block 13 of the left accommodation groove 11 relative to the ratchet gear 21 during reverse rotation.

From the above, it can be known that the present invention not only saves the trouble of the existing ratchet screwdriver to process additional projections in the gear making, but also improves the convenience of production, and utilizes the contact between the blocking block and the large-area guide surface of the locking block, Both have high structural strength to withstand the pushing force, effectively reduce wear, and can ensure the normal function of the ratchet screwdriver to switch the pulling direction for a long time, and the sliding surface of the locking block located on the other side of the locking teeth When the block retreats or returns to mesh with the ratchet gear, it can fit and slide with the inner wall of the accommodating groove, increasing the smoothness of advancing and retreating of the locking block.

In addition, regardless of the first structural aspect or the second structural aspect of the present invention, a corresponding inner contour fitting frame can be provided in the accommodating hole opened by the wheel seat and the accommodating groove on the peripheral side. For the implementation of this technical feature, please refer to Figure 10 and Figure 11. The ratchet gear 21 is placed in the accommodation frame 19 corresponding to the accommodation hole 10, and each locking block 13 is placed in the accommodation frame 19 corresponding to each At the accommodation groove 11, and the blocking wall 18 separating the accommodation groove 11 in the second structural aspect is also formed on the accommodation frame 19. The accommodation frame 19 and the wheel base 1 are made of different metal materials respectively, and the accommodation frame The material hardness of 19 is greater than that of the wheel base 1. For example, the wheel base 1 is made of zinc alloy, and the container frame 19 is made of steel. The container frame 19 with the advantage of material hardness bears the ratchet gear 21 and the locking block. 13 friction when rotating or moving, and can save the material cost of the wheel base 1.

Claims (8)

1. A ratchet screwdriver reversing device, characterized in that it comprises a wheel seat and a ratchet lever, wherein: The wheel seat is arranged on the front end of the ratchet screwdriver, and the wheel seat is provided with a housing hole. The two sides of the housing hole are connected with symmetrical housing grooves. The housing hole is connected with a groove between the two housing grooves. In the movable slot, a latching block is arranged in each accommodating slot, and one side of each latching block has one-way latching teeth, and a spring is used on the opposite side to hold against the wall of the accommodating slot; The ratchet lever is provided with a ratchet gear on a rod body ring, and a slot is opened at the front end of the rod body for inserting the screwdriver head. The ratchet gear is inserted into the accommodating hole and meshes with the catch teeth of the catch block with the ratchet teeth; The wheel seat is covered with a cover, and the cover has a cover hole for the rod body to pass through. The inside of the cover is provided with a block corresponding to the position of the movable groove, and the block extends into the wheel seat along with the cover cover. The movable groove rotates the cover relative to the wheel seat, so that the block moves in the movable groove and pushes one of the locking blocks to retreat from the ratchet gear, and the other locking block and the ratchet gear engage or jump to achieve the pull. The function of moving the workpiece. 2. The ratchet screwdriver reversing device according to claim 1, characterized in that a hole is provided above the wall where the accommodating hole is located on the said wheel seat, and a positioning unit is arranged in the seat hole, and the positioning unit is an elastic Three positioning holes are arranged on the inner side of the cover corresponding to the position of the seat hole. The positioning unit uses a ball embedded in one of the positioning holes, and switches to the corresponding other positioning hole as the cover rotates relative to the wheel seat. . 3. The ratchet screwdriver reversing device according to claim 1, characterized in that, a housing frame corresponding to the inner contour is provided in the housing hole and the housing groove on the peripheral side, and the ratchet gear is placed in the housing frame Corresponding to the accommodating holes, each locking block is placed in the accommodating frame corresponding to each accommodating groove, and the accommodating frame and the wheel base are made of metals of different materials, and the material hardness of the container frame is greater than that of the wheel base. 4. The ratchet screwdriver reversing device according to claim 1, characterized in that a set of posts protrudes from the side corresponding to each of the locking blocks and each spring, and the corresponding springs are socketed by the sets of posts. The locking block forms a sliding surface and a guiding surface on both sides of the locking tooth, the sliding surface is in contact with the inner wall of the accommodating groove, and the guiding surface is used for contacting with the blocking block; In addition, the cover is provided with at least one groove on the periphery of the inner wall, the groove width of which is equal to the sum of the pitches of the three positioning holes, and the wheel seat is provided with a retaining rib at the position corresponding to the groove. The retaining rib is located in the groove and abuts against one side of the groove as the cover rotates relative to the wheel base, thereby limiting the rotation range of the cover. 5. A ratchet screwdriver reversing device, characterized in that it includes a wheel seat and a ratchet lever, wherein: The wheel seat is arranged on the front end of the ratchet screwdriver, and the wheel seat is provided with a housing hole, the two sides of the upper half of the housing hole are connected with symmetrical first and second housing grooves, and the two sides of the lower half The side is connected with symmetrical third and fourth accommodating grooves, and the accommodating hole is respectively connected with a movable groove between the first and second accommodating grooves and the third and fourth accommodating grooves. There is a separate retaining wall between the slot and the second and fourth accommodating slots, and a locking block is arranged in each accommodating slot. One side of each locking block has unidirectional locking teeth, and the opposite side is provided with a locking tooth. The spring is against the wall of the accommodating tank; The ratchet lever is provided with a ratchet gear on a rod body ring, and a slot is opened at the front end of the rod body for inserting the screwdriver head. The ratchet gear is inserted into the accommodating hole and meshes with the catch teeth of the catch block with the ratchet teeth; The wheel seat is covered with a cover, and the cover has a cover hole for the rod body to pass through. The inner side of the cover is respectively provided with a block corresponding to the position of each movable groove, and each block extends along with the cover sleeve to set the wheel seat. Enter the corresponding movable groove, and turn the cover relative to the wheel seat, so that the block moves in the movable groove and pushes one pair of corners of the catch block to retreat from the ratchet gear, and the other opposite corner of the catch block The meshing or jumping with the ratchet gear can achieve the function of pulling the workpiece. 6. The ratchet screwdriver reversing device according to claim 5, characterized in that a hole is provided above the wall where the accommodating hole is located on the said wheel seat, and a positioning unit is arranged in the seat hole, and the positioning unit is an elastic Three positioning holes are arranged on the inner side of the cover corresponding to the position of the seat hole. The positioning unit uses a ball embedded in one of the positioning holes, and switches to the corresponding other positioning hole as the cover rotates relative to the wheel seat. . 7. The ratchet screwdriver reversing device according to claim 5, characterized in that, a housing frame corresponding to the inner contour fit is provided in the housing hole and the housing groove on the peripheral side, and the ratchet gear is placed in the housing frame Corresponding to the accommodating holes, each locking block is placed in the corresponding accommodating grooves of the accommodating frame, and the retaining wall separating the accommodating grooves is also formed on the accommodating frame, and the accommodating frame and the wheel seat are made of metals of different materials into, and the material hardness of the container frame is greater than that of the wheel seat. 8. The ratchet screwdriver reversing device according to claim 5, characterized in that, a set of columns protrudes from the side corresponding to each locking block and each spring, and the corresponding springs are socketed by the sets of columns. The locking block forms a sliding surface and a guiding surface on both sides of the locking tooth, the sliding surface is abutted against the inner wall of the accommodating groove, and the guiding surface is used to contact the abutting block; Also, the cover is cut with at least one groove on the periphery of the inner wall, the groove width of which is equal to the sum of the pitches of the three positioning holes, and the wheel seat is provided with a retaining rib at the position corresponding to the groove. , the blocking rib is located in the groove, and abuts against one side of the groove as the cover rotates relative to the wheel base, thereby limiting the rotation range of the cover.

Images