Crawler belt positioning device of crawler belt type flexographic printing machine

Abstract

The utility model relates to a crawler-type flexographic printing machine, in particular to a crawler belt positioning device of the crawler-type flexographic printing machine, which comprises a roller shaft and a crawler belt, the crawler belt is wound on the roller shaft, the roller shaft is provided with positioning pieces, the crawler belt is provided with positioning holes, the positioning pieces are matched with the positioning holes, and the positioning pieces are distributed along the circumferential direction of the roller shaft. The positioning piece is elastically connected with the roll shaft, the section of the positioning piece is matched with the positioning hole, the positioning piece is provided with a first position, a second position, a third position and a fourth position, the positioning piece stretches out when the positioning piece is located at the first position and the third position, and the positioning piece abuts against the edge of the positioning hole and retracts under stress when the positioning piece is located at the second position and the fourth position; the positioning piece can pass through the second position when moving from the first position to the third position, the positioning piece can pass through the fourth position when moving from the third position to the first position, and the elastic connection enables the positioning piece to be in flexible contact with the positioning hole in the process of entering and exiting the positioning hole.

Description

Technical Field

[0001] The utility model relates to a crawler type flexographic printing machine, in particular to a crawler belt positioning device of the crawler type flexographic printing machine. Background Art

[0002] A Chinese utility patent with publication number CN220095851U discloses a crawler track positioning device for a crawler-type flexographic printing machine, which realizes lateral and longitudinal positioning of the crawler track by means of mutual meshing of positioning teeth and cooperation of protrusions and positioning holes. The meshing of the positioning teeth is prone to wear. In addition, when the top of the protrusion enters and exits the positioning hole, the moving speed of the protrusion is equal to the moving speed of the positioning hole, so the component speed of the moving speed of the protrusion in the direction of the positioning hole is less than the moving speed of the positioning hole. The protrusion will conflict with the wall of the positioning hole and generate friction to enlarge the positioning hole. Both of these will lead to positioning failure. Utility Model Content

[0003] In view of the technical problems existing in the background technology, the utility model aims to provide a crawler positioning device for a crawler-type flexographic printing machine, in which the positioning member and the positioning hole are in flexible contact, with less wear, long service life and reliable positioning.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions: the flexible contact track positioning device comprises a roller shaft and a track, the track is wound around the roller shaft, the roller shaft is provided with a positioning piece, the track is provided with a positioning hole, the positioning piece cooperates with the positioning hole, wherein the positioning piece is distributed along the circumference of the roller shaft, the positioning piece is elastically connected to the roller shaft, the cross-section of the positioning piece is adapted to the positioning hole, the positioning piece has a first position, a second position, a third position and a fourth position, the positioning piece extends out when the positioning piece is in the first position and the third position, the positioning piece contacts the edge of the positioning hole and retracts under force when the positioning piece is in the second position and the fourth position, the positioning piece passes through the second position when the positioning piece moves from the first position to the third position, and passes through the fourth position when the positioning piece moves from the third position to the first position.

[0005] In this solution, the rotation of the roller drives the positioning member to pass through the first position, the second position, the third position and the fourth position in sequence. The positioning member enters the positioning hole to limit the lateral and longitudinal deviation of the track. The elastic connection makes the contact between the positioning member and the positioning hole flexible during the process of entering and exiting the positioning hole. The pressure on the contact surface is small, the corresponding friction is small, and the wear is less, thereby extending the life of the positioning member and ensuring the size of the positioning hole.

[0006] Preferably, the positioning member includes a head having an arc surface, and the head abuts against an edge of the positioning hole when the positioning member is located at the second position and the fourth position, and the head protrudes out of the positioning hole when the positioning member is located at the third position.

[0007] In this solution, the arc surface design facilitates the positioning piece to enter and exit the positioning hole, and the contact time between the positioning piece and the positioning hole during the entry and exit process is short, the contact area is small, and the corresponding wear is less.

[0008] Preferably, the positioning member comprises a main body, and a cross section of the main body is adapted to the positioning hole.

[0009] In this solution, the cross section of the main body matches the positioning hole, which stably limits the longitudinal and lateral deviation of the crawler track.

[0010] Preferably, the positioning hole is a straight hole, and the main body is columnar.

[0011] In this solution, the straight hole and columnar design reduce the friction and wear generated when the positioning piece limits the positioning block.

[0012] Preferably, the roller shaft is provided with a mounting frame, the mounting frame has spring plates distributed along the circumferential direction, the positioning member is connected to the spring plates, and there is a gap between adjacent spring plates.

[0013] In this scheme, when the positioning piece enters or exits the positioning hole and conflicts with the track, the spring piece is deformed by force and drives the positioning piece to retract. After entering or exiting the positioning hole, the spring piece resets and drives the positioning piece to extend, achieving flexible contact. The gap setting ensures that the deformation of adjacent spring pieces will not interfere with each other.

[0014] Preferably, the roller sleeve is provided with a mounting plate, the mounting plate is provided with limiting holes distributed along the circumference for the positioning member to pass through, and the mounting frame is installed in the mounting plate.

[0015] In this solution, the limiting hole guides the extension and retraction of the positioning member, thereby ensuring that the positioning member can be aligned with the positioning hole.

[0016] Preferably, the positioning member includes a tail portion, the tail portion is provided with a limiting portion, the limiting hole limits the passage of the limiting portion, and the limiting portion abuts against the spring sheet.

[0017] In this solution, the limiting portion cooperates with the limiting hole so that the positioning member will not be separated from the limiting hole and maintains connection with the spring sheet.

[0018] Preferably, the mounting frame is provided with a retaining ring, and the retaining ring is tightly connected to the mounting plate.

[0019] In this solution, the retaining ring restricts the mounting member within the mounting plate, the spring piece will not deviate, and the friction between the spring piece and the positioning member is only generated when the spring piece is deformed under force.

[0020] Preferably, a mounting hole is provided on the side of the roller shaft, and a mounting opening is provided on the mounting plate and the retaining ring. The mounting opening cooperates with the mounting hole, the mounting opening is larger than the mounting hole, and a fastener passes through the mounting opening and is connected to the mounting hole.

[0021] In this solution, fasteners are connected to the mounting holes to fix the mounting plate and the retaining ring on both sides of the roller shaft. The mounting opening is set so that the mounting plate and the retaining ring do not need to be aligned with the roller shaft and can be installed freely.

[0022] Preferably, the mounting bracket is provided with a notch, and the outline of the notch and the outline of the mounting opening have the same part.

[0023] In this solution, by aligning the notch and the portion with the same contour as the mounting opening, the spring piece can be aligned with the corresponding limiting hole and the positioning piece, making the installation quick and convenient.

[0024] The beneficial effects of the utility model are as follows: the elastic connection makes the contact between the positioning piece and the positioning hole flexible during the process of the positioning piece entering and exiting the positioning hole, the pressure of the contact surface is small, the arc surface design facilitates the positioning piece to enter and exit the positioning hole, and the contact time between the positioning piece and the positioning hole is short during the process of entering and exiting, the contact area is small, the positioning piece and the positioning hole are less worn, and the service life is long. Therefore, compared with the prior art, the utility model has substantial characteristics and progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following describes the relevant details and working principles of the implementation methods and embodiments of the present utility model in conjunction with the accompanying drawings.

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0027] Figure 2 for Figure 1 A is an enlarged view of the middle image.

[0028] Figure 3 for Figure 2 Schematic diagram with the retaining ring removed.

[0029] Figure 4 It is a schematic diagram of the mounting hole in the utility model.

[0030] Figure 5 It is a three-dimensional structural schematic diagram of the mounting frame in the utility model.

[0031] Figure 6 It is a three-dimensional structural schematic diagram of the positioning member in the utility model.

[0032] Figure 7 It is a schematic diagram of the positioning member in the utility model being located at the second position.

[0033] Figure 8It is a schematic diagram of the positioning member in the utility model being located at the third position.

[0034] Fig. 9 It is a schematic diagram of the positioning member in the utility model being located at the fourth position.

[0035] In the figure: 1, roller; 2, crawler; 3, positioning piece; 4, positioning hole; 5, head; 6, main body; 7, mounting frame; 8, spring piece; 9, mounting plate; 11, limit part; 12, retaining ring; 13, mounting hole; 14, mounting opening; 15, fastener; 16, notch. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the implementation of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field without making creative work based on the embodiments of the utility model are within the scope of protection of the utility model.

[0037] See attached Figure 1-9 In the embodiment of the present embodiment, a crawler positioning device of a crawler-type flexographic printing machine includes a roller shaft 1 and a crawler 2, the crawler 2 is wound around the roller shaft 1, the roller shaft 1 is provided with a positioning member 3, the crawler 2 is provided with a positioning hole 4, and the positioning member 3 cooperates with the positioning hole 4.

[0038] The positioning member 3 is distributed along the circumference of the roller shaft 1, and the roller shaft 1 is provided with a mounting frame 7 and a mounting plate 9. The mounting frame 7 is provided with spring pieces 8 along the circumference, and there are gaps between adjacent spring pieces 8. The mounting plate 9 is provided with limiting holes for the positioning member 3 to pass through along the circumference, and the mounting frame 7 is installed in the mounting plate 9. The positioning member 3 includes a head 5, a main body 6 and a tail. The tail is provided with a limiting portion 11. The limiting hole limits the passage of the limiting portion 11, and the limiting portion 11 abuts against the spring piece 8. The head 5 has an arc surface, and the cross section of the main body 6 is adapted to the positioning hole 4. The positioning hole 4 is a straight hole, the main body 6 is columnar, the positioning member 3 has a first position, a second position, a third position and a fourth position. When the positioning member 3 is in the first position, the positioning member 3 extends out, and when the positioning member 3 is in the third position, the head 5 extends out of the positioning hole 4. When the positioning member 3 is in the second position and the fourth position, the positioning member 3 contacts the edge of the positioning hole 4 and retracts under force. When the positioning member 3 moves from the first position to the third position, the positioning member 3 passes through the second position, and when the positioning member 3 moves from the third position to the first position, the positioning member 3 passes through the fourth position.

[0039] In this embodiment, the roller 1 drives the mounting plate 9 and the mounting frame 7 to rotate, and maintains the positional relationship between the mounting plate 9 and the mounting frame 7. The mounting plate 9 drives the positioning member 3 to rotate through the limiting hole. The positioning member 3 passes through the first position, the second position, the third position and the fourth position in sequence, and then returns to the first position from the fourth position. The positioning member 3 enters the positioning hole 4 to limit the lateral and longitudinal displacement of the crawler 2. Among them, the mounting plate 9 can be set on only one side or on both sides; the mounting frame 7 is an elastomer, which is designed as an integral part with the spring piece 8 and is directly processed and formed; taking the process of the positioning member 3 withdrawing from the positioning hole 4 as an example, the moving speed of the crawler 2 and the positioning hole 4 is equal to the linear speed of the roller 1 surface, and the moving speed of the positioning hole 4 is close to or equal to the moving speed of the positioning member 3. When the positioning member 3 withdraws from the positioning hole 4, the positioning member 3 The moving trajectory is an arc, so the component speed of the moving speed of the positioning member 3 in the direction of the positioning hole 4 must be smaller than the moving speed of the positioning hole 4 and, if the moving direction of the positioning hole 4 is set from front to back, the front part of the positioning member 3 will conflict with the front edge of the positioning hole 4, causing friction and expanding the positioning hole 4. If the part of the positioning member 3 extending out of the positioning hole 4 is an arc surface and is adapted to the moving trajectory of the positioning member 3, the front edge of the positioning hole 4 can be effectively avoided, the friction can be reduced or even avoided, and the positioning member 3 entering the positioning hole 4 is a reverse process; when it is in the first position, the positioning member 3 has not passed through the positioning hole 4, when it is in the third position, the positioning member 3 has passed through the positioning hole 4, when it is in the second position, the positioning member 3 is passing through the positioning hole 4, and when it is in the fourth position, the positioning member 3 is exiting the positioning hole 4.

[0040] In other alternative embodiments, the spring 8 can be replaced by an elastic member such as a spring, and the positioning hole 4 can be set on a synchronous belt, which is installed on one side of the track 2; the positioning hole 4 has a taper or a groove, and the positioning member 3 is in the shape of a truncated cone with a small top and a large bottom, and the contact surface between the hole wall and the positioning member 3 is inclined relative to the surface of the track 2.

[0041] See attached Figure 2-4 The mounting frame 7 is provided with a retaining ring 12, and the retaining ring 12 is fastened to the mounting plate 9. A mounting hole 13 is provided on the side of the roller shaft 1. The mounting plate 9 and the retaining ring 12 are provided with a mounting opening 14, and the mounting opening 14 cooperates with the mounting hole 13. The mounting opening 14 is larger than the mounting hole 13. A fastener 15 passes through the mounting opening 14 and is connected to the mounting hole 13. The mounting frame 7 is provided with a notch 16, and the contour of the notch 16 has the same part as the contour of the mounting opening 14.

[0042] In the present embodiment, during installation, the positioning member 3 is first extended into the limiting hole, and then the mounting frame 7 is placed in the mounting plate 9 and the notch 16 and the mounting opening 14 are aligned with the parts with the same contour, the spring piece 8 is aligned and abutted against the positioning member 3, and then the retaining ring 12 is placed, and the corresponding hole positions of the retaining ring 12 and the mounting plate 9 are aligned for fastening connection, and finally the fastener 15 is passed through the retaining ring 12 and the mounting opening 14 of the mounting plate 9 to connect with the mounting hole 13 of the roller shaft 1, and the installation method is not limited to this.

[0043] In other embodiments, protrusions may also be provided for the mounting bracket 7 to be aligned.

[0044] The above is a preferred embodiment of the utility model, and it should be noted that the protection scope of the utility model is not limited thereto. For those skilled in the art, without departing from the equivalent inventive concept of the technical scope disclosed by the utility model, several improvements and modifications or equivalent substitutions can be made, which are also regarded as the protection scope of the utility model.

Claims

1. A crawler belt positioning device for a crawler-type flexographic printing machine, comprising a roller shaft (1) and a crawler belt (2), wherein the crawler belt (2) is wound around the roller shaft (1), the roller shaft (1) is provided with a positioning member (3), the crawler belt (2) is provided with a positioning hole (4), the positioning member (3) cooperates with the positioning hole (4), and is characterized in that: The positioning members (3) are distributed along the circumference of the roller shaft (1), the positioning members (3) are elastically connected to the roller shaft (1), and the cross section of the positioning members (3) is adapted to the positioning holes (4); The positioning member (3) has a first position, a second position, a third position and a fourth position. When the positioning member (3) is located at the first position and the third position, the positioning member (3) extends out. When the positioning member (3) is located at the second position and the fourth position, the positioning member (3) contacts the edge of the positioning hole (4) and retracts under force. When the positioning member (3) moves from the first position to the third position, the positioning member (3) passes through the second position. When the positioning member (3) moves from the third position to the first position, the positioning member (3) passes through the fourth position.

2. The crawler belt positioning device of a crawler type flexographic printing press according to claim 1, characterized in that: The positioning member (3) comprises a head (5), the head (5) having an arc surface, the head (5) abutting against an edge of the positioning hole (4) when the positioning member (3) is located at the second position and the fourth position, and the head (5) protrudes from the positioning hole (4) when the positioning member (3) is located at the third position.

3. The crawler belt positioning device of a crawler type flexographic printing press according to claim 2, characterized in that: The positioning member (3) comprises a main body portion (6), and a cross section of the main body portion (6) is adapted to the positioning hole (4).

4. The crawler belt positioning device of a crawler type flexographic printing press according to claim 3, characterized in that: The positioning hole (4) is a straight hole, and the main body (6) is columnar.

5. The crawler belt positioning device of a crawler type flexographic printing press according to claim 1, characterized in that: The roller shaft (1) is provided with a mounting frame (7), the mounting frame (7) is provided with spring sheets (8) distributed along the circumferential direction, the positioning member (3) is connected to the spring sheets (8), and there is a gap between adjacent spring sheets (8).

6. The crawler belt positioning device of a crawler type flexographic printing press according to claim 5, characterized in that: The roller shaft (1) is sleeved with a mounting plate (9), the mounting plate (9) having limiting holes distributed along the circumference for the positioning member (3) to pass through, and the mounting frame (7) is mounted in the mounting plate (9).

7. A crawler belt positioning device for a crawler type flexographic printing press as claimed in claim 6, characterized in that: The positioning member (3) comprises a tail portion, the tail portion is provided with a limiting portion (11), the limiting hole limits the passing of the limiting portion (11), and the limiting portion (11) abuts against the spring sheet (8).

8. The crawler belt positioning device of a crawler-type flexographic printing press according to claim 7, characterized in that: The mounting frame (7) is provided with a retaining ring (12), and the retaining ring (12) is firmly connected to the mounting plate (9).

9. The crawler belt positioning device of a crawler type flexographic printing press according to claim 8, characterized in that: The roller shaft (1) is provided with a mounting hole (13) on its side, the mounting plate (9) and the retaining ring (12) are provided with a mounting opening (14), the mounting opening (14) cooperates with the mounting hole (13), the mounting opening (14) is larger than the mounting hole (13), and a fastener (15) passes through the mounting opening (14) and is connected to the mounting hole (13).

10. The crawler belt positioning device of a crawler type flexographic printing press according to claim 9, characterized in that: The mounting frame (7) is provided with a notch (16), and the outline of the notch (16) and the outline of the mounting opening (14) have the same portion.

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