Combined flat nose pliers with quickly replaceable jaws

Abstract

This utility model relates to the field of machining fixture technology and discloses a combination flat-jaw pliers with quick-change jaws. It includes a base, with a first connecting frame and a second connecting frame respectively on the top of the base. A jaw seat is fixed to one side of each of the first and second connecting frames, and a jaw body is located on one side of the jaw seat. A connecting component is located on one side of the jaw seat for disassembling and replacing the jaw body. A clamping component is located on one side of the base. By loosening and tightening a second bolt, utilizing the fit between the limiting block and the fourth and fifth inclined surfaces on the connecting plate, as well as the elastic force of the spring, the jaw body is securely fixed after installation. This allows for easy disassembly and installation of the jaw body without complicated tools or operating procedures. The jaw body can be easily disassembled and replaced. When the jaw body is worn or damaged, a new jaw body can be replaced promptly, thereby extending the service life of the entire device.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, specifically a combination flat-jaw pliers with quick-change jaws. Background Technology

[0002] In machining, a flat-jaw vise is a commonly used clamping tool used to hold workpieces in place for various machining operations, such as milling, drilling, and grinding.

[0003] Existing flat-jaw vises use a pair of mutually repelling magnets between the clamping plate and the jaws to achieve quick jaw replacement. When the screw is loosened, the repulsive force of the magnets pushes out the clamping block, allowing the jaws to be replaced. However, in actual use on machine tools, flat-jaw vises have significant drawbacks. First, vibrations from machine operation can demagnetize the magnets. Once demagnetized, the repulsive force disappears, preventing the clamping block from being pushed out, and thus rendering the quick jaw replacement ineffective. Second, metal shavings and cutting fluid generated during machining can easily enter between the magnets, interfering with the mutual repulsive force and weakening the magnetic force. When the magnetic force is insufficient to push out the clamping plate, quick jaw replacement is also impossible.

[0004] Existing flat-jaw vises have a built-in pressure plate on the movable slide. Their working principle relies on the interaction between the lead screw and a steel ball, generating a downward force. However, this structure has several drawbacks. First, the steel ball is an independent component; if the lead screw is not tightened, the ball can easily dislodge from the groove, causing the movable slide to wobble and produce abnormal noise. Furthermore, the steel ball is small and easily lost. Replacing it is cumbersome, requiring the slide to be removed from the main jaw and then the pressure plate removed. Second, the contact surface between the pressure plate and the steel ball is a point, with the anti-tilting force concentrated in the center, resulting in the greatest force in the middle. The anti-tilting force gradually weakens at both ends of the jaws, leading to uneven force distribution and potential instability when gripping workpieces. Therefore, a combination flat-jaw vise with quickly replaceable jaws is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a combination flat-jaw pliers with quickly interchangeable jaws to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a combination flat-jaw pliers with quick-change jaws, comprising a base, wherein a first connecting frame and a second connecting frame are respectively provided on the top of the base, a jaw seat is fixed on one side of the first connecting frame and the second connecting frame, and a jaw body is provided on one side of the jaw seat;

[0007] A connecting component is provided on one side of the jaw base, and the connecting component is used for disassembling and replacing the jaw body;

[0008] A clamping assembly is provided on one side of the base, and the clamping assembly is used to adjust the position of the first connecting frame;

[0009] The clamping assembly includes a fixing frame, a first limiting groove is provided at the bottom of the fixing frame, a ball is placed inside the first limiting groove, a lead screw is threaded to one side of the fixing frame, and a first bolt is threaded to both sides of the fixing frame.

[0010] The connecting assembly includes two connecting plates. A fourth inclined surface is provided on one side of the top of the connecting plate. A plurality of second limiting grooves are provided on the top of the inner wall of the jaw seat. A first sliding groove is provided on the inner wall of the second limiting groove.

[0011] Preferably, the connecting plate and the first sliding groove are both trapezoidal in shape, the outer side of the connecting plate is adapted to the inner side of the first sliding groove, the first sliding groove is connected to the second limiting groove, and the connecting plate is fixed to one side of the jaw body.

[0012] Preferably, as described above, a limiting block is inserted into the inner side of the second limiting groove, and a second bolt threaded to the inner side of the second limiting groove is inserted into one side of the top of the limiting block.

[0013] Preferably, as described above, a spring is sleeved on the outside of the second bolt, and the two ends of the spring are respectively connected to one side of the second limiting groove and the limiting block.

[0014] Preferably, the limiting block has a fifth inclined surface on one side of its bottom, which is adapted to the fourth inclined surface.

[0015] Preferably, the base has a second sliding groove at the top, and the bottom of the inner wall of the second sliding groove has several grooves. When the first bolt is tightened, it abuts against the ball and gets into any one of the grooves.

[0016] Preferably, as described above, a slide plate is slidably connected to the inner side of the second slide groove, a pressure plate is fixed to the top of the slide plate, the pressure plate is slidably connected to the inner side of the first connecting frame, a first inclined surface is provided on one side of the top of the pressure plate, and an anti-loosening nut located on one side of the fixed frame is threaded to the outer side of the lead screw.

[0017] When the lead screw is tightened, one end of the lead screw pushes the pressure plate toward the jaw seat.

[0018] Preferably, in the above-mentioned case, one of the jaw seats is fixed with a first support frame on one side, and a second inclined surface is provided on one side of the first support frame. The cross-sectional shape of the second inclined surface is triangular, and the second inclined surface is adapted to the first inclined surface.

[0019] Preferably, the first connecting frame is slidably connected to the inner side of the second sliding groove, the second connecting frame is fixed to one end of the top of the base, a cover plate is sleeved on the outer side of the fixing frame, and the fixing frame is fixed to one side of the first connecting frame.

[0020] Preferably, in the above-mentioned case, a second support frame is fixed to one side of one of the jaw seats, and a third inclined surface is provided on one side of the second support frame, wherein the third inclined surface is an arc surface.

[0021] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects:

[0022] 1. By loosening and tightening the second bolt, utilizing the fit between the limiting block and the fourth and fifth inclined surfaces on the connecting plate, as well as the elastic force of the spring, the jaw body can be securely fixed after installation. This allows for easy disassembly and installation of the jaw body without complicated tools or operating procedures. The jaw body can be easily disassembled and replaced. When the jaw body is worn or damaged, it can be replaced with a new one in a timely manner, thereby extending the service life of the entire equipment.

[0023] 2. By loosening and tightening the first bolt, the movement of the ball within the first limiting groove can be easily controlled, allowing the first connecting frame to slide freely within the second sliding groove and be positioned as required, meeting the needs of different working conditions. After determining the position of the first connecting frame, tightening the first bolt causes the ball to engage with the inner side of the groove. Utilizing the engaging action between the ball and the groove, the first connecting frame is firmly fixed to the base, effectively preventing displacement of the first connecting frame during equipment operation and ensuring the stability and reliability of the equipment. Subsequently, rotating the lead screw, through the threaded connection between the lead screw, the anti-loosening nut, and the fixing frame, causes the lead screw to move towards the pressure plate, thereby pushing the pressure plate towards the jaw seat. With the cooperation of the first and second inclined surfaces, the pressure plate generates downward and forward contact forces on the first support frame, achieving a stable clamping and fixing of the jaw body, jaw seat, and first connecting frame to the top of the base, ensuring clamping strength and stability, and improving processing quality. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a first-view structural diagram of the present invention;

[0026] Figure 2This is a schematic diagram of the second-view structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the lead screw structure of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the sphere in this utility model;

[0029] Figure 5 This is a schematic diagram of the structure at the joint between the pressure plate and the first support frame of this utility model;

[0030] Figure 6 This is a cross-sectional structural diagram of the connecting plate of this utility model;

[0031] Figure 7 This is a schematic diagram of the slide plate structure of this utility model;

[0032] Figure 8 This is a schematic diagram of the structure of the first support frame of this utility model;

[0033] Figure 9 This is a schematic diagram of the structure of the second support frame of this utility model.

[0034] Explanation of reference numerals in the attached drawings: 1. Base; 2. Clamping assembly; 21. Lead screw; 22. Anti-loosening nut; 24. Fixing frame; 25. First bolt; 26. First limiting groove; 27. Ball; 28. Groove; 29. ​​Pressure plate; 210. First inclined surface; 211. Second inclined surface; 212. First support frame; 213. Slide plate; 214. Second support frame; 215. Third inclined surface; 3. Jaw body; 4. Jaw seat; 5. Connecting assembly; 51. Connecting plate; 52. First sliding groove; 53. Fourth inclined surface; 54. Spring; 55. Second limiting groove; 56. Limiting block; 57. Second bolt; 58. Fifth inclined surface; 6. First connecting frame; 7. Cover plate; 8. Second connecting frame; 10. Second sliding groove. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0037] Example 1

[0038] Please see Figure 1-8 This utility model provides a technical solution: a combination flat-jaw pliers with quick-change jaws, including a base 1, a first connecting frame 6 and a second connecting frame 8 respectively provided on the top of the base 1, a jaw seat 4 fixed on one side of both the first connecting frame 6 and the second connecting frame 8, a jaw body 3 provided on one side of the jaw seat 4, the jaw body 3 being made of Cr12MoV; a connecting component 5 provided on one side of the jaw seat 4, the connecting component 5 being used for disassembling and replacing the jaw body 3; a clamping component 2 provided on one side of the base 1, the clamping component 2 being used to adjust the position of the first connecting frame 6;

[0039] The connecting assembly 5 includes two connecting plates 51. A fourth inclined surface 53 is provided on one side of the top of the connecting plate 51. Several second limiting grooves 55 are opened on the top of the inner wall of the jaw seat 4. A first sliding groove 52 is provided on the inner wall of the second limiting groove 55. The connecting plate 51 is fixed to one side of the jaw body 3. Its trapezoidal structure is adapted to the first sliding groove 52 on the top of the inner wall of the jaw seat 4. Quick insertion and removal are achieved through the second limiting groove 55 and the limiting block 56. The shape of the connecting plate 51 and the first sliding groove 52 are both trapezoidal. The outer side of the connecting plate 51 is adapted to the inner side of the first sliding groove 52. The first sliding groove 52 is connected to the second limiting groove 55. The connecting plate 51 is fixed to one side of the jaw body 3.

[0040] A limiting block 56 is inserted into the inner side of the second limiting groove 55. A second bolt 57, threaded to the inner side of the second limiting groove 55, is inserted into one side of the top of the limiting block 56. A spring 54 is sleeved on the outer side of the second bolt 57. The two ends of the spring 54 are respectively connected to one side of the second limiting groove 55 and the limiting block 56. The fifth inclined surface 58 at the bottom of the limiting block 56 cooperates with the inclined surface of the fourth inclined surface 53 at the top of the connecting plate 51. Under the action of the spring 54, a self-locking position is achieved. The fifth inclined surface 58 is provided on one side of the bottom of the limiting block 56. The fifth inclined surface 58 is adapted to the fourth inclined surface 53.

[0041] The clamping assembly 2 includes a fixing frame 24. The bottom of the fixing frame 24 has a first limiting groove 26. A ball 27 is placed inside the first limiting groove 26. The depth of the first limiting groove 26 is greater than the radius of the ball 27, and the width of the groove is less than the diameter of the ball 27. A lead screw 21 is threaded to one side of the fixing frame 24, and first bolts 25 are threaded to both sides of the fixing frame 24. The top of the base 1 has a second sliding groove 10. The bottom of the inner wall of the second sliding groove 10 has several grooves 28. When the first bolts 25 are tightened, the ball 27 is engaged in any one of the grooves 28. First, the first connecting frame 6 and the second support frame 214 are slid. Then, the cover plate 7 is removed, and the first bolts 25 are tightened in sequence so that the first bolts 25 engage the ball 27 in the groove 28. After sliding the first connecting frame 6 to the target position, the first bolts 25 are tightened, pushing the ball 27 into the corresponding groove 28 to achieve position locking.

[0042] A slide plate 213 is slidably connected to the inner side of the second slide groove 10. A pressure plate 29 is fixed to the top of the slide plate 213. The pressure plate 29 is slidably connected to the inner side of the first connecting frame 6. A first inclined surface 210 is provided on one side of the top of the pressure plate 29. An anti-loosening nut 22 located on one side of the fixed frame 24 is threadedly connected to the outer side of the lead screw 21. The anti-loosening nut 22 locks the lead screw 21 to prevent it from retracting. After the lead screw 21 is tightened, the anti-loosening nut 22 is pressed tightly against the rear end face of the fixed frame 24 in the tightening direction. A huge frictional force is generated between the contact surface of the anti-loosening nut 22 and the fixed frame 24, which prevents the lead screw 21 from rotating in the opposite direction and greatly reduces the impact of vibration. Due to factors such as movement and clearance, there is a risk of loosening of the lead screw 21. At the same time, the pressure plate 29 slides in the second slide groove 10 through the slide plate 213 to ensure that the clamping force is evenly distributed. When the lead screw 21 is tightened, one end of the lead screw 21 pushes the pressure plate 29 to move towards the jaw seat 4. When the lead screw 21 is rotated, the lead screw 21 pushes the pressure plate 29 and the slide plate 213 to move towards the first support frame 212. At this time, the first inclined surface 210 and the second inclined surface 211 of the pressure plate 29 cooperate to make the pressure plate 29 generate downward and forward contact forces on the first support frame 212, so that the jaw body 3, jaw seat 4 and the first connecting frame 6 are clamped and fixed on the top of the base 1.

[0043] One of the jaw seats 4 is fixed with a first support frame 212 on one side. The first support frame 212 has a second inclined surface 211 on one side. The cross-sectional shape of the second inclined surface 211 is triangular. The second inclined surface 211 is adapted to the first inclined surface 210. The first inclined surface 210 on the top of the pressure plate 29 and the second inclined surface 211 of the first support frame 212 form an inclined surface fit, which converts the axial thrust of the lead screw 21 into a combined downward and forward force, so that the jaw seat 4, the jaw body 3 and the first connecting frame 6 form a stable clamp on the top of the base 1. The first connecting frame 6 is slidably connected to the inside of the second slide groove 10. The second connecting frame 8 is fixed to one end of the top of the base 1. The outer side of the fixing frame 24 is fitted with a cover plate 7. The fixing frame 24 is fixed to one side of the first connecting frame 6.

[0044] Working principle: When it is necessary to replace the jaw body 3, first loosen the second bolt 57. Under the elastic force of the spring 54, the limiting block 56 moves along the second limiting groove 55. Since the fifth inclined surface 58 is adapted to the fourth inclined surface 53, as the limiting block 56 moves, the connecting plate 51 is no longer blocked by the limiting block 56. Since the connecting plate 51 and the first sliding groove 52 are both trapezoidal in shape, and the outer side of the connecting plate 51 is adapted to the inner side of the first sliding groove 52, the first sliding groove 52 is connected to the second limiting groove 55, and the connecting plate 51 is fixed to one side of the jaw body 3, the jaw body 3 can be slid out of the first sliding groove 52 with the connecting plate 51 to complete the disassembly.

[0045] When installing the new jaw body 3, slide the connecting plate 51 into the first slide groove 52, and then tighten the second bolt 57. The second bolt 57 pushes the limiting block 56 to move towards the connecting plate 51 against the elastic force of the spring 54 until the fifth inclined surface 58 and the fourth inclined surface 53 are tightly fitted, fixing the connecting plate 51 in the first slide groove 52, thereby completing the installation of the jaw body 3.

[0046] When adjusting the position of the first connecting frame 6, first loosen the first bolt 25. At this time, the first bolt 25 no longer abuts the ball 27, and the ball 27 can move freely in the first limiting groove 26. Since the second sliding groove 10 is provided on the top of the base 1, the first connecting frame 6 is slidably connected to the inner side of the second sliding groove 10. Therefore, the first connecting frame 6 can be slid to the desired position. After determining the position, tighten the first bolt 25 in sequence. The first bolt 25 moves towards the ball 27 and abuts the ball 27, so that the ball 27 is inserted into any one of the grooves 28 provided at the bottom of the inner wall of the second sliding groove 10. Through the engagement of the ball 27 and the groove 28, the first connecting frame 6 is fixed on the base 1.

[0047] When it is necessary to clamp and fix the jaw seat 4 and the first connecting frame 6, the lead screw 21 is rotated. Because the outer thread of the lead screw 21 is connected to the anti-loosening nut 22 located on one side of the fixing frame 24, and the lead screw 21 is threaded to one side of the fixing frame 24, the lead screw 21 will move towards the pressure plate 29. Since the pressure plate 29 is fixed to the top of the slide plate 213 and the pressure plate 29 is slidably connected to the inner side of the first connecting frame 6, one end of the lead screw 21 pushes the pressure plate 29 towards the jaw seat 4. Rotating the lead screw 21 pushes the pressure plate 29 and the slide plate 213 towards the first support. When the frame 212 moves, the first inclined surface 210 and the second inclined surface 211 cooperate to make the pressure plate 29 exert downward and forward contact force on the first support frame 212, thereby clamping and fixing the jaw body 3, jaw seat 4 and the first connecting frame 6 to the top of the base 1. Then, tighten the anti-loosening nut 22, and the second connecting frame 8 is fixed to one end of the base 1, forming a symmetrical clamping structure with the first connecting frame 6. The positioning of the ball 27 and the groove 28 and the reset function of the spring 54 together constitute a mechanical linkage system to realize the clamping and quick change requirements.

[0048] Example 2

[0049] Please see Figure 9 The difference between this embodiment and embodiment one is that: a second support frame 214 is fixed on one side of one of the jaw seats 4, and a third inclined surface 215 is provided on one side of the second support frame 214. The third inclined surface 215 is an arc surface.

[0050] Compared to flat or sharp bevels, the arc surface can distribute the force more evenly on the workpiece and jaw seat 4 during clamping. When the jaws apply clamping force to the workpiece, the third bevel 215 of the arc surface can avoid local stress concentration, reduce the deformation or damage to the workpiece caused by uneven force, and at the same time reduce the risk of wear of the jaw seat 4 due to excessive force, thus extending the service life of the equipment.

[0051] In summary, by loosening and tightening the second bolt 57, utilizing the fit between the limiting block 56 and the fourth inclined surface 53 and the fifth inclined surface 58 on the connecting plate 51, as well as the elastic force of the spring 54, the jaw body 3 can be securely fixed after installation. This allows for easy disassembly and installation of the jaw body 3 without the need for complicated tools or operating procedures. The jaw body 3 can be easily disassembled and replaced. When the jaw body 3 is worn or damaged, a new jaw body 3 can be replaced in a timely manner, thereby extending the service life of the entire equipment.

[0052] By loosening and tightening the first bolt 25, the movement of the ball 27 within the first limiting groove 26 can be easily controlled, allowing the first connecting frame 6 to slide freely within the second sliding groove 10 and be positioned as required, meeting the needs of different working conditions. After determining the position of the first connecting frame 6, tightening the first bolt 25 causes the ball 27 to engage with the inner side of the groove 28. Utilizing the engaging action between the ball 27 and the groove 28, the first connecting frame 6 is securely fixed to the base 1, effectively preventing displacement of the first connecting frame 6 during equipment operation and ensuring the smooth operation of the equipment. To ensure the stability and reliability of the operation, the lead screw 21 is then rotated. Through the threaded connection between the lead screw 21, the anti-loosening nut 22, and the fixing bracket 24, the lead screw 21 moves towards the pressure plate 29, which in turn pushes the pressure plate 29 towards the jaw seat 4. With the cooperation of the first inclined surface 210 and the second inclined surface 211, the pressure plate 29 generates downward and forward contact forces on the first support frame 212, so that the jaw body 3, jaw seat 4, and the first connecting frame 6 are firmly clamped and fixed on the top of the base 1, ensuring the clamping force and stability, which is beneficial to improving the processing quality.

[0053] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this utility model. In particular, the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways without departing from the spirit and teachings of this utility model. All such combinations and / or combinations fall within the scope of this utility model.

Claims

1. A combination combination wrench with quick-change jaw, comprising a base (1), characterized in that, The base (1) is provided with a first connecting frame (6) and a second connecting frame (8) on the top. A jaw seat (4) is fixed on one side of the first connecting frame (6) and the second connecting frame (8). A jaw body (3) is provided on one side of the jaw seat (4). A connecting component (5) is provided on one side of the jaw seat (4), and the connecting component (5) is used for disassembling and replacing the jaw body (3); The base (1) is provided with a clamping assembly (2) on one side, and the clamping assembly (2) is used to adjust the position of the first connecting frame (6); The clamping assembly (2) includes a fixing frame (24), the bottom of the fixing frame (24) is provided with a first limiting groove (26), a ball (27) is placed inside the first limiting groove (26), a lead screw (21) is threaded to one side of the fixing frame (24), and a first bolt (25) is threaded to both sides of the fixing frame (24). The connecting assembly (5) includes two connecting plates (51). A fourth inclined surface (53) is provided on one side of the top of the connecting plate (51). A plurality of second limiting grooves (55) are provided on the top of the inner wall of the jaw seat (4). A first sliding groove (52) is provided on the inner wall of the second limiting groove (55).

2. The combination wrench with quickly replaceable jaw according to claim 1, characterized in that, The connecting plate (51) and the first slide groove (52) are both trapezoidal in shape. The outer side of the connecting plate (51) is adapted to the inner side of the first slide groove (52). The first slide groove (52) is connected to the second limiting groove (55). The connecting plate (51) is fixed to one side of the jaw body (3).

3. A combination wrench with quick-change jaws according to claim 2, wherein, A limiting block (56) is inserted into the inner side of the second limiting groove (55), and a second bolt (57) threaded to the inner side of the second limiting groove (55) is inserted into one side of the top of the limiting block (56).

4. The combination wrench with quickly replaceable jaw according to claim 3, characterized in that, A spring (54) is sleeved on the outside of the second bolt (57), and the two ends of the spring (54) are respectively connected to one side of the second limiting groove (55) and the limiting block (56).

5. A combination wrench with quick-change jaws as claimed in claim 4, wherein, The bottom side of the limiting block (56) is provided with a fifth inclined surface (58), which is adapted to the fourth inclined surface (53).

6. The combination wrench with quick-change jaw of claim 1, wherein, The base (1) has a second sliding groove (10) on its top. The bottom of the inner wall of the second sliding groove (10) has several grooves (28). When the first bolt (25) is tightened, it abuts against the ball (27) and gets into any one of the grooves (28).

7. A combination wrench with quick-change jaws as defined in claim 6, wherein The second slide groove (10) is slidably connected to a slide plate (213), and a pressure plate (29) is fixed on the top of the slide plate (213). The pressure plate (29) is slidably connected to the inner side of the first connecting frame (6). A first inclined surface (210) is provided on one side of the top of the pressure plate (29). The screw (21) is threadedly connected to an anti-loosening nut (22) located on one side of the fixed frame (24). When the lead screw (21) is tightened, one end of the lead screw (21) pushes the pressure plate (29) to move toward the jaw seat (4).

8. The combination wrench with quickly replaceable jaw according to claim 7, characterized in that, One of the jaw seats (4) is fixed with a first support frame (212) on one side. The first support frame (212) has a second inclined surface (211) on one side. The cross-sectional shape of the second inclined surface (211) is triangular. The second inclined surface (211) is adapted to the first inclined surface (210).

9. The combination wrench with quickly replaceable jaw according to claim 8, characterized in that, The first connecting frame (6) is slidably connected to the inner side of the second slide groove (10), the second connecting frame (8) is fixed to one end of the top of the base (1), the outer side of the fixing frame (24) is fitted with a cover plate (7), and the fixing frame (24) is fixed to one side of the first connecting frame (6).

10. The combination wrench with quickly replaceable jaw according to claim 8, characterized in that, One of the jaw seats (4) is fixed with a second support frame (214) on one side, and a third inclined surface (215) is provided on one side of the second support frame (214), and the third inclined surface (215) is an arc surface.

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