Excavator tooth holder and cutting board combined structure capable of reducing installation gap

Abstract

The utility model relates to an excavator tooth holder and cutting board combined structure capable of reducing a mounting gap, which comprises a cutting board and a plurality of tooth holders which are detachably fixed on the cutting board and are sequentially arranged at equal intervals along the length direction of the cutting board, and two clamping blocks which are symmetrically arranged up and down are outwards formed on one side, close to the cutting board, of each tooth holder. A clamping groove is formed between the two clamping blocks; a plurality of raised line units which are sequentially arranged at equal intervals in the length direction of the cutting board are outwards formed on the outer walls of the upper side and the lower side of the cutting board, and the number of the raised line units is equal to that of the tooth holders; the raised line unit comprises a plurality of raised lines which are sequentially arranged at equal intervals in the width direction of the cutting board, and correspondingly, the inner walls of the upper side and the lower side of the clamping groove are provided with grooves which are the same in number and are sequentially distributed at equal intervals in the length direction of the clamping block; according to the bucket tooth, the mounting gap originally existing between the tooth holder and the cutting board is greatly reduced, so that the working accuracy and stability of the bucket tooth are ensured, and the service life of the tooth holder and the service life of the cutting board are prolonged.

Description

Technical Field

[0001] The utility model relates to a combined structure of an excavator tooth seat and a knife plate which can reduce the installation gap. Background Art

[0002] The blade is an important component of the excavator bucket. It is set at the bottom edge of the bucket opening and can be removed. In order to enhance the bucket's cutting and digging capabilities, a row of bucket teeth is also installed on the blade. The bucket teeth are composed of a tooth seat and a tooth tip. The tooth tip is detachably fixed on the tooth seat for easy replacement. If the tooth tip fails due to severe wear, only the tooth tip needs to be replaced.

[0003] The tooth seat is fixed to the blade by welding or threaded fasteners. The tooth seat fixed to the blade by welding is inconvenient to disassemble. If the tooth seat cannot be used due to severe damage, it can only be removed by cutting, but it is very easy to damage the blade. The method of fixing the tooth seat to the blade by threaded fasteners can better solve the above problems. However, in order to ensure that the tooth seat and the blade can be installed smoothly, the inner diameter of the hole on the blade and the inner diameter of the hole on the tooth seat are both larger than the outer diameter of the bolt in the threaded fastener. This results in a large installation gap after the tooth seat is fixed to the blade, resulting in relative displacement between the tooth seat and the blade due to external force during operation, which not only affects the working accuracy and stability of the bucket tooth, but also accelerates the wear of the tooth seat and the blade due to frequent friction between the tooth seat and the blade, thereby shortening the service life of the tooth seat and the blade, which needs further improvement. Utility Model Content

[0004] In view of the current status of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide an excavator tooth seat and blade plate combination structure that can reduce the installation gap and can significantly reduce the installation gap originally existing between the tooth seat and the blade while ensuring that the tooth seat can be disassembled, thereby ensuring the working accuracy and stability of the bucket teeth and extending the service life of the bucket teeth and the blade.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: an excavator tooth seat and blade combination structure capable of reducing the installation gap, comprising a blade and a plurality of tooth seats detachably fixed on the blade and arranged in sequence at equal intervals along the length direction of the blade, two clamping blocks symmetrically arranged up and down are formed outwardly on one side of the tooth seat close to the blade, a clamping groove is formed between the two clamping blocks, the inner walls on the upper and lower sides of the clamping groove are parallel to each other and respectively fit on the outer walls on the upper and lower sides of the blade, and the characteristics are:

[0006] The upper and lower outer walls of the knife plate are formed with a plurality of convex strip units arranged in sequence and at equal intervals along the length direction of the knife plate, and the number of the convex strip units is equal to the number of the tooth seats;

[0007] The convex strip unit comprises a plurality of convex strips arranged at equal intervals in sequence along the width direction of the blade, and correspondingly, the inner walls on both upper and lower sides of the clamping groove are provided with the same number of grooves which are distributed at equal intervals in sequence along the length direction of the clamping block, and the vertical cross-sectional shapes of the convex strips and the grooves are both isosceles trapezoids;

[0008] The length of the convex strip is not greater than the length of the concave groove;

[0009] The height of the convex strip and the depth of the concave groove match each other;

[0010] The spacing between any two adjacent grooves and the spacing between any two adjacent convex strips are matched with each other so that the inclined outer walls on both sides of each convex strip are respectively attached to the inclined inner walls on both sides of a corresponding convex strip, thereby preventing the gear seat from moving relative to the blade in the width direction of the blade to eliminate the installation gap between the two.

[0011] A separation groove is formed between any two adjacent convex strips, and the distance a between the upper or lower edge of the opening of the clamping groove and the adjacent side edge of the opening of an adjacent groove is smaller than the bottom width of the separation groove.

[0012] Preferably, each of the clamping blocks is provided with a waist-shaped cavity symmetrically distributed on the outer wall on the side opposite to the clamping groove, and the bottom surface of the waist-shaped cavity is parallel to the upper or lower inner wall of the clamping groove.

[0013] Preferably, a waist-shaped groove hole symmetrically distributed with each other is provided between the bottom surface of the upper waist-shaped sinking cavity and the upper inner wall of the clamping groove, and between the bottom surface of the lower waist-shaped sinking cavity and the lower inner wall of the clamping groove. Correspondingly, at least two first threaded through holes distributed in sequence along the width direction of the knife plate are provided between the upper and lower outer walls of the knife plate, and the center distance between the two outermost first threaded through holes is smaller than the length of the waist-shaped groove hole.

[0014] Preferably, each of the waist-shaped groove holes is also interspersed with at least two first fastening bolts, the number of the first fastening bolts is equal to the number of the first threaded through holes, the threaded end of each of the first fastening bolts above is inserted and screwed into the upper end of a corresponding first threaded through hole, and the threaded end of each of the first fastening bolts below is inserted and screwed into the lower end of a corresponding first threaded through hole.

[0015] Preferably, the head of each of the first fastening bolts is completely disposed in a corresponding waist-shaped countersunk cavity; the threaded ends of the two first fastening bolts respectively inserted and threadedly connected to the two ends of the same first threaded through hole do not contact each other.

[0016] Preferably, a reinforcement seat is provided between each of the tooth seats and the upper and lower outer walls of the knife plate, and an open groove is provided on the outer wall on the side close to the knife plate of the reinforcement seat, and the two clamping blocks on the tooth seat are respectively embedded in the opening grooves of the two reinforcement seats so that the two side outer walls of the clamping blocks are respectively attached to the two side inner walls of the opening grooves, and the reinforcement seat is detachably fixed on the knife plate so that the bottom inner wall of the opening groove is pressed against the corresponding side outer wall of the clamping block.

[0017] Preferably, both side edges of the opening of the opening groove are formed with an extension block outwardly, and a plurality of countersunk holes are formed on the outer wall of the extension block on the side opposite to the knife plate, and a through hole is formed between the bottom center of each countersunk hole and the outer wall of the extension block on the side close to the knife plate. Correspondingly, two second threaded through hole combinations are formed in the knife plate and are respectively located below the two extension blocks. The second threaded through hole combination includes a plurality of second threaded through holes, and the number of the second threaded through holes is equal to the number of the countersunk holes on each extension block, and each of the second threaded through holes is located below a corresponding countersunk hole.

[0018] Preferably, a second fastening bolt is inserted into each of the through holes, and the threaded end of each of the second fastening bolts above is inserted and screwed into the upper end of a corresponding second threaded through hole, and the threaded end of each of the second fastening bolts below is inserted and screwed into the lower end of a corresponding second threaded through hole.

[0019] Preferably, the head of each of the second fastening bolts is completely disposed in a corresponding countersunk hole; and the threaded ends of the two second fastening bolts respectively inserted and threadedly connected to the two ends of the same second threaded through hole do not contact each other.

[0020] Preferably, a first inclined surface is formed on the outer wall of the clamping block on the side opposite to the clamping groove, and correspondingly, a second inclined surface that cooperates with the first inclined surface is formed at the bottom of the opening groove; when the second inclined surface and the first inclined surface are in contact with each other, the outer wall of the extension block on the side close to the knife plate is spaced a certain distance from the corresponding side outer wall of the knife plate or is in contact with the corresponding side outer wall of the knife plate.

[0021] Compared with the prior art, the utility model has the advantages that: the utility model can effectively prevent the relative displacement between the tooth seat and the blade after fixation by means of the mutual cooperation of the convex strip and the groove while ensuring that the tooth seat can be disassembled, thereby greatly reducing the installation gap originally existing between the tooth seat and the blade, thereby ensuring the working accuracy and stability of the bucket tooth, and avoiding frequent friction between the tooth seat and the blade to slow down the wear rate of the tooth seat and the blade, thereby extending the service life of the tooth seat and the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1This is a top-down exploded structural diagram of the utility model;

[0023] Figure 2 It is a schematic diagram of the top-down steps when installing the gear seat of the utility model;

[0024] Figure 3 It is a top side structural diagram of the reinforcement seat of the utility model. DETAILED DESCRIPTION

[0025] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0027] like Figures 1 to 3 As shown, a tooth holder and blade combination structure of an excavator capable of reducing installation clearance comprises a blade 1 and a plurality of tooth holders 2 detachably fixed on the blade 1 and arranged in sequence at equal intervals along the length direction of the blade 1, two clamping blocks 21 symmetrically arranged up and down are formed outwardly on one side of the tooth holder 2 close to the blade 1, a clamping groove 22 is formed between the two clamping blocks 21, and the inner walls of the clamping groove 22 on the upper and lower sides are parallel to each other and respectively fit on the outer walls of the upper and lower sides of the blade 1;

[0028] A plurality of convex strip units are formed outwardly on the outer walls of the upper and lower sides of the blade 1 and are arranged in sequence at equal intervals along the length direction of the blade 1. The number of the convex strip units is equal to the number of the tooth seats 2.

[0029] The convex strip unit includes a plurality of convex strips 11 arranged at equal intervals in sequence along the width direction of the blade 1. Correspondingly, the inner walls of the upper and lower sides of the clamping groove 22 are provided with the same number of grooves 23 which are distributed at equal intervals in sequence along the length direction of the clamping block 21. The vertical cross-sectional shapes of the convex strips 11 and the grooves 23 are both isosceles trapezoids.

[0030] The length of the convex strip 11 is not greater than the length of the concave groove 23;

[0031] The height of the ridge 11 and the depth of the groove 23 match each other;

[0032] The spacing between any two adjacent grooves 23 and the spacing between any two adjacent ridges 11 cooperate with each other so that the inclined outer walls on both sides of each ridge 11 are respectively fitted on the inclined inner walls on both sides of the corresponding ridge 11, thereby preventing the tooth seat 2 from moving relative to the knife plate 1 in the width direction of the knife plate 1, thereby eliminating the installation gap between the two.

[0033] A waist-shaped cavity 24 symmetrically distributed with respect to each other is provided on the outer wall of each clamping block 21 opposite to the clamping groove 22 . The bottom surface of the waist-shaped cavity 24 is parallel to the upper or lower inner wall of the clamping groove 22 .

[0034] A waist-shaped groove hole 25 symmetrically distributed between the bottom surface of an upper waist-shaped sinking cavity 24 and the upper inner wall of the clamping groove 22 is also provided, as well as between the bottom surface of a lower waist-shaped sinking cavity 24 and the lower inner wall of the clamping groove 22. Correspondingly, at least two first threaded through holes 12 distributed in sequence along the width direction of the knife plate 1 are provided between the upper and lower outer walls of the knife plate 1, and the center distance between the two outermost first threaded through holes 12 is less than the length of the waist-shaped groove hole 25.

[0035] At least two first fastening bolts 3 are inserted in each waist-shaped groove hole 25, and the number of the first fastening bolts 3 is equal to the number of the first threaded through holes 12. The threaded end of each first fastening bolt 3 at the top is inserted and screwed into the upper end of a corresponding first threaded through hole 12, and the threaded end of each first fastening bolt 3 at the bottom is inserted and screwed into the lower end of a corresponding first threaded through hole 12.

[0036] The head of each first fastening bolt 3 is completely disposed in a corresponding waist-shaped countersunk cavity 24; the threaded ends of the two first fastening bolts 3 respectively inserted and threadedly connected to the two ends of the same first threaded through hole 12 do not contact each other.

[0037] A dividing groove 14 is formed between any two adjacent convex strips 11, and the distance a between the upper or lower edge of the opening of the clamping groove 22 and the adjacent side edge of the opening of a groove 23 is smaller than the bottom width of the dividing groove 14, so that the upper and lower edges of the opening of the clamping groove 22 can smoothly extend into the corresponding dividing groove 14 without being blocked by the inner wall of the dividing groove 14.

[0038] A reinforcement seat 4 is also provided between each tooth seat 2 and the upper and lower outer walls of the knife plate 1. An open groove 41 is provided on the outer wall of the reinforcement seat 4 on the side close to the knife plate 1. The two clamping blocks 21 on the tooth seat 2 are respectively embedded in the opening grooves 41 of the two reinforcement seats 4 so that the two side outer walls of the clamping blocks 21 are respectively attached to the two side inner walls of the opening groove 41. The reinforcement seat 4 is detachably fixed on the knife plate 1 so that the bottom inner wall of the opening groove 41 is pressed tightly against the corresponding side outer wall of the clamping block 21.

[0039] An extension block 42 is formed outwardly on both side edges of the opening of the opening groove 41, and a plurality of countersunk holes 43 are formed on the outer wall of the extension block 42 on the side opposite to the blade plate 1. A through hole 44 is formed between the bottom center of each countersunk hole 43 and the outer wall of the extension block 42 on the side close to the blade plate 1. Correspondingly, two second threaded through hole combinations are formed in the blade plate 1 and are respectively located below the two extension blocks 42. The second threaded through hole combination includes a plurality of second threaded through holes 13. The number of the second threaded through holes 13 is equal to the number of the countersunk holes 43 on each extension block 42, and each second threaded through hole 13 is located below a corresponding countersunk hole 43.

[0040] A second fastening bolt 5 is also inserted in each through hole 44, and the threaded end of each upper second fastening bolt 5 is inserted and screwed into the upper end of a corresponding second threaded through hole 13, and the threaded end of each lower second fastening bolt 5 is inserted and screwed into the lower end of a corresponding second threaded through hole 13.

[0041] The head of each second fastening bolt 5 is completely disposed in a corresponding countersunk hole 43 ; the threaded ends of the two second fastening bolts 5 respectively inserted and threadedly connected to the two ends of the same second threaded through hole 13 do not contact each other.

[0042] A first inclined surface 26 is also formed on the outer wall of the clamping block 21 on the side opposite to the clamping groove 22. Correspondingly, a second inclined surface 45 that cooperates with the first inclined surface 26 is formed at the bottom of the opening groove 41. When the second inclined surface 45 and the first inclined surface 26 are in contact with each other, the outer wall of the extension block 42 on the side close to the blade plate 1 is spaced a certain distance from the corresponding side outer wall of the blade plate 1 or is in contact with the corresponding side outer wall of the blade plate 1.

[0043] How to install the gear holder 2:

[0044] Align the clamping groove 22 on the tooth seat 2 with the blade 1 and move it in the direction of the blade 1, but do not align the clamping groove 22 with the convex strip unit, otherwise the tooth seat 2 will be blocked by the convex strip unit; when the tooth seat 2 is in place, the tooth seat 2 is located on one side of the convex strip unit, then, move the tooth seat 2 along the length direction of the blade 1 and appropriately adjust the depth of the blade 1 extending into the clamping groove 22, so that each convex strip 11 in the upper convex strip unit is inserted into a corresponding groove 23 on the upper clamping block 21, and each convex strip 11 in the lower convex strip unit is inserted into a corresponding groove 23 on the lower clamping block 21, so that the tooth seat 2 can be prevented from having relative movement with the blade 1 in the width direction of the blade 1, thereby eliminating the installation gap between the two.

[0045] Next, at least two first fastening bolts 3 are inserted into each waist-shaped groove hole 25, and the threaded end of each first fastening bolt 3 at the top is inserted into and screwed into the upper end of a corresponding first threaded through hole 12, and then the threaded end of each first fastening bolt 3 at the bottom is also inserted into and screwed into the lower end of a corresponding first threaded through hole 12; and then the inclined outer walls on both sides of each convex strip 11 are respectively attached to the inclined inner walls on both sides of a corresponding convex strip 11, thereby completing the fixation of the gear seat 2.

[0046] Method for installing reinforcement seat 4:

[0047] Align the opening groove 41 on the reinforcing seat 4 with the clamping block 21 on the same side and sleeve it outside a clamping block 21 on the same side so that the two side outer walls of the clamping block 21 are respectively fitted on the two side inner walls of the opening groove 41, and then move the reinforcing seat 4 laterally until the second inclined surface 45 on the reinforcing seat 4 is fitted on the first inclined surface 26, and then continue to reinforce the seat 4 so that each through hole 44 is located above a corresponding second threaded through hole 13. In this process, the height of the reinforcing seat 4 will change with the help of the mutual cooperation between the second inclined surface 45 and the first inclined surface 26; then insert a second threaded through hole 13 into each through hole 44, And the threaded end of each second fastening bolt 5 at the top is inserted and screwed into the upper end of a corresponding second threaded through hole 13, and then the threaded end of each second fastening bolt 5 at the bottom is inserted and screwed into the lower end of a corresponding second threaded through hole 13, so that the installation of the reinforcement seat 4 is completed. The reinforcement seat 4 increases the fixing strength between the tooth seat 2 and the knife plate 1 and effectively prevents the tooth seat 2 from shifting relative to the knife plate 1 along the length direction of the convex strip 11; at this time, the outer wall of one side of the extension block 42 close to the knife plate 1 is spaced a certain distance from the corresponding side outer wall of the knife plate 1 or contacts the corresponding side outer wall of the knife plate 1.

[0048] The utility model can effectively prevent the relative displacement between the tooth seat 2 and the blade 1 after being fixed by means of the mutual cooperation of the convex strip 11 and the groove 23 while ensuring that the tooth seat 2 can be disassembled, thereby greatly reducing the installation gap originally existing between the tooth seat 2 and the blade 1, thereby ensuring the working accuracy and stability of the bucket tooth, and avoiding frequent friction between the tooth seat 2 and the blade 1 to slow down the wear rate of the tooth seat 2 and the blade 1, thereby extending the service life of the tooth seat 2 and the blade 1.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A combined structure of a tooth holder and a blade for an excavator capable of reducing installation clearance, comprising a blade and a plurality of tooth holders detachably fixed on the blade and arranged at equal intervals in sequence along the length direction of the blade, two clamping blocks symmetrically arranged up and down are formed outwardly on one side of the tooth holder close to the blade, a clamping groove is formed between the two clamping blocks, the inner walls of the clamping groove on the upper and lower sides are parallel to each other and respectively fit on the outer walls of the upper and lower sides of the blade, and the characteristics are: The upper and lower outer walls of the knife plate are formed with a plurality of convex strip units arranged in sequence and at equal intervals along the length direction of the knife plate, and the number of the convex strip units is equal to the number of the tooth seats; The convex strip unit comprises a plurality of convex strips arranged at equal intervals in sequence along the width direction of the blade, and correspondingly, the inner walls on both upper and lower sides of the clamping groove are provided with the same number of grooves which are distributed at equal intervals in sequence along the length direction of the clamping block, and the vertical cross-sectional shapes of the convex strips and the grooves are both isosceles trapezoids; The length of the convex strip is not greater than the length of the concave groove; The height of the convex strip and the depth of the concave groove match each other; The spacing between any two adjacent grooves and the spacing between any two adjacent convex strips are matched with each other so that the inclined outer walls on both sides of each convex strip are respectively attached to the inclined inner walls on both sides of a corresponding convex strip, thereby preventing the gear seat from moving relative to the blade in the width direction of the blade to eliminate the installation gap between the two. A separation groove is formed between any two adjacent convex strips, and the distance a between the upper or lower edge of the opening of the clamping groove and the adjacent side edge of the opening of an adjacent groove is smaller than the bottom width of the separation groove.

2. The excavator tooth seat and blade combination structure capable of reducing installation gap according to claim 1, characterized in that: A waist-shaped cavity symmetrically distributed with respect to each other is provided on the outer wall of each clamping block on the side opposite to the clamping groove, and the bottom surface of the waist-shaped cavity is parallel to the upper or lower inner wall of the clamping groove.

3. The excavator tooth seat and blade combination structure capable of reducing installation gap according to claim 2, characterized in that: A waist-shaped groove hole symmetrically distributed between the bottom surface of the upper waist-shaped sinking cavity and the upper inner wall of the clamping groove, and between the bottom surface of the lower waist-shaped sinking cavity and the lower inner wall of the clamping groove, is also provided. Correspondingly, at least two first threaded through holes distributed in sequence along the width direction of the knife plate are provided between the upper and lower outer walls of the knife plate, and the center distance between the two outermost first threaded through holes is less than the length of the waist-shaped groove hole.

4. The excavator tooth seat and blade combination structure capable of reducing installation gap according to claim 3 is characterized in that: Each of the waist-shaped groove holes is also interspersed with at least two first fastening bolts, the number of the first fastening bolts is equal to the number of the first threaded through holes, the threaded end of each of the first fastening bolts above is inserted and screwed into the upper end of a corresponding first threaded through hole, and the threaded end of each of the first fastening bolts below is inserted and screwed into the lower end of a corresponding first threaded through hole.

5. The excavator tooth holder and blade assembly structure capable of reducing installation clearance according to claim 4, characterized in that: The head of each of the first fastening bolts is completely disposed in a corresponding waist-shaped countersunk cavity; the threaded ends of the two first fastening bolts respectively inserted and threadedly connected to the two ends of the same first threaded through hole do not contact each other.

6. The excavator tooth seat and blade combination structure capable of reducing installation gap according to claim 1, characterized in that: A reinforcement seat is also provided between each of the tooth seats and the upper and lower outer walls of the knife plate. An open groove is provided on the outer wall of the reinforcement seat on one side close to the knife plate. The two clamping blocks on the tooth seat are respectively embedded in the open grooves of the two reinforcement seats so that the two side outer walls of the clamping blocks are respectively attached to the two side inner walls of the opening groove. The reinforcement seat is detachably fixed on the knife plate so that the bottom inner wall of the opening groove is pressed tightly against the corresponding side outer wall of the clamping block.

7. The excavator tooth holder and blade assembly structure capable of reducing installation clearance according to claim 6, characterized in that: An extension block is formed outwardly on both side edges of the opening of the opening groove, and a plurality of countersunk holes are formed on the outer wall of the extension block on the side opposite to the knife plate. A through hole is formed between the bottom center of each countersunk hole and the outer wall of the extension block on the side close to the knife plate. Correspondingly, two second threaded through hole combinations are formed in the knife plate and are respectively located below the two extension blocks. The second threaded through hole combination includes a plurality of second threaded through holes, and the number of the second threaded through holes is equal to the number of the countersunk holes on each extension block, and each of the second threaded through holes is located below a corresponding countersunk hole.

8. The excavator tooth holder and blade assembly structure capable of reducing installation clearance according to claim 7, characterized in that: A second fastening bolt is also inserted in each of the through holes, and the threaded end of each of the second fastening bolts at the top is inserted and screwed into the upper end of a corresponding second threaded through hole, and the threaded end of each of the second fastening bolts at the bottom is inserted and screwed into the lower end of a corresponding second threaded through hole.

9. The excavator tooth seat and blade combination structure capable of reducing installation gap according to claim 8, characterized in that: The head of each second fastening bolt is completely disposed in a corresponding countersunk hole; the threaded ends of the two second fastening bolts respectively inserted and threaded into the two ends of the same second threaded through hole do not contact each other.

10. The excavator tooth holder and blade assembly structure capable of reducing installation clearance according to claim 7, characterized in that: A first inclined surface is also formed on the outer wall of the clamping block on the side opposite to the clamping groove, and correspondingly, a second inclined surface that cooperates with the first inclined surface is formed at the bottom of the opening groove; when the second inclined surface and the first inclined surface are in contact with each other, the outer wall of the extension block on the side close to the knife plate is spaced a certain distance from the corresponding side outer wall of the knife plate or contacts the corresponding side outer wall of the knife plate.

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