Tooth pressing tool of balance shaft

Abstract

The utility model discloses a tooth pressing tool of a balance shaft, and relates to the technical field of assembly clamps. Comprising a positioning clamp used for limiting the balance shaft and a tooth fixing mechanism used for limiting the position of a gear tooth groove, the positioning clamp comprises a base used for containing the balance shaft, a positioning protrusion and a fixing clamping block, the positioning protrusion and the fixing clamping block are arranged on the base and matched with the key position of the balance shaft, and the fixing clamping block is movably arranged and used for fixing the balance shaft between the base and the fixing clamping block; the tooth fixing mechanism comprises positioning clamping teeth matched with the gear tooth grooves in an inserted mode, and the positioning clamping teeth are connected with the base and matched with the positioning protrusions in position. Based on the balance shaft of a specific structure, the positioning clamp capable of positioning the balance shaft and the tooth fixing mechanism capable of positioning the gear are arranged, it is ensured that the positions of the gear and the balance shaft can meet requirements before assembly, and the tooth pressing precision of the balance shaft is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of assembly fixtures, in particular to a gear pressing tool for a balancing shaft. Background Art

[0002] like Figure 1 The figure shows a balancing shaft that needs to be processed by pressing teeth. The balancing shaft is provided with two sector-shaped counterweights arranged at intervals and a key position. The balancing shaft needs to be assembled by pressing teeth. When performing the pressing teeth assembly, the gear to be assembled is sleeved on the end of the balancing shaft, and then the gear is fixed on the balancing shaft by interference fit by applying pressure through a hydraulic mechanism.

[0003] In the prior art, when the balancing shaft of the above structure is subjected to gear pressing, the balancing shaft is fixed by a fixture, and then the gear is placed at the end of the balancing shaft, and then the gear pressing operation is performed by a hydraulic mechanism. During the processing, the position of the gear tooth groove needs to be defined according to the position of the key position on the balancing shaft for subsequent assembly. However, the existing gear pressing tool cannot locate the key position on the balancing shaft and the gear tooth groove. Therefore, it is necessary to provide a gear pressing tool adapted to the balancing shaft and gear of the above structure. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a gear pressing tool for a balancing shaft, which solves the problem in the prior art that the key position of the balancing shaft and the tooth groove of the gear are inaccurately positioned when the balancing shaft is performing a gear pressing operation.

[0005] To achieve the above purpose, the utility model adopts the following technical solution: a balancing shaft tooth pressing tool, including a positioning fixture for limiting the balancing shaft and a fixed tooth mechanism for limiting the position of the gear tooth groove,

[0006] The positioning fixture comprises a base for placing the balancing shaft, a positioning protrusion arranged on the base and adapted to the key position of the balancing shaft, and a fixed clamping block, wherein the fixed clamping block is movably arranged to fix the balancing shaft between the base and the fixed clamping block;

[0007] The fixed gear mechanism comprises a positioning latch tooth which is plugged into and matched with the tooth groove of the gear, and the positioning latch tooth is connected to the base and is adapted to the position of the positioning protrusion.

[0008] Principle of the utility model:

[0009] Place the balancing shaft to be processed on the base, ensure that the key position of the balancing shaft and the positioning protrusion are engaged, position the balancing shaft, and then use the fixing clamp to fix the balancing shaft on the base. Set the gear to be assembled on the mounting end of the balancing shaft, use the plug-in fit between the positioning clamp teeth and the gear tooth grooves to ensure that the gear is fixed in place, then use the hydraulic mechanism to squeeze the gear, assemble the gear and the balancing shaft, release the fixing of the balancing shaft, and complete the pressing gear assembly of the balancing shaft.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model is based on a balancing shaft with a specific structure, and is provided with a positioning fixture for positioning the balancing shaft and a tooth-fixing mechanism for positioning the gear, thereby ensuring that the positions of the gear and the balancing shaft before assembly can meet the requirements and ensuring the tooth pressing accuracy of the balancing shaft.

[0012] Furthermore, the positioning latch is connected to a positioning seat fixed on the base, and the positioning latch is telescopically arranged on the positioning seat along the radial direction of the gear.

[0013] Furthermore, the base is fixed with an installation slot that cooperates with the counterweight block close to the gear on the balance shaft and a supporting slot that adapts to the balance shaft. The supporting slot is arranged on the side of the installation slot away from the gear and is consistent with the slot direction of the installation slot. The counterweight block is embedded in the installation slot and the fan-shaped side wall of the counterweight block fits the outer wall of the support slot.

[0014] Furthermore, the base is provided with a fixed seat and a movable seat arranged at intervals along the length direction of the balancing shaft. The fixed seat is arranged close to the supporting through slot, and the balancing shaft is placed on the fixed seat and the movable seat and fixed by a fixed clamp block.

[0015] Furthermore, the fixed seat and the movable seat include through-slot structures which are narrowed from the slot opening toward the slot bottom, and the balancing shaft is placed on the two through-slot structures.

[0016] Furthermore, the positioning protrusion is arranged between the fixed seat and the movable seat, and the positioning protrusion and the movable seat are both arranged in a strip groove opened on the base, the length direction of the strip groove is arranged along the length direction of the balance shaft, and the positioning protrusion and the movable seat slide or fix along the strip groove.

[0017] Furthermore, there are two fixed clamps, which are arranged at intervals. The fixed clamp is provided with a hinged movable rod, which is hinged to a fixed column arranged on the base. The fixed clamp is provided with a driving member for driving it to swing, and the fixed clamp swings to fix the balance shaft.

[0018] Furthermore, the driving member includes a moving rod, which is parallel to the fixed column and hinged to the fixed clamping block. The moving rod is telescopic along the base to drive the fixed clamping plate to swing.

[0019] Furthermore, the moving rod is fixed to the piston end of the telescopic cylinder fixed on the base.

[0020] Furthermore, it also includes at least one support rod, one end of which is fixed to the base, and the other end of which is in contact with the fixing seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an exploded view of the structure of the balance shaft and gear to be pressed in the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the utility model when it is installed in cooperation with a balance shaft, a gear, and a press sleeve;

[0023] Figure 3 for Figure 2 A schematic diagram of the structure from another perspective;

[0024] Figure 4 It is a schematic diagram of the structure of the utility model;

[0025] Figure 5 for Figure 4 A schematic diagram of the structure from another perspective;

[0026] Figure 6 for Figure 5 The schematic diagram of the structure is shown in FIG. 1 , in which the fixed clamp block and the telescopic cylinder piston barrel are removed.

[0027] In the figure: balancing shaft 101, gear 102, counterweight 103, key 104, cylindrical structure 105, pressing sleeve 106, base 1, positioning protrusion 11, convex strip 111, sliding seat 112, mounting slot 12, supporting slot 13, fixed seat 14, support rod 15, movable seat 16, strip groove 17, fixed clamp 2, movable rod 21, telescopic cylinder 22, fixed column 23, moving rod 24, positioning tooth 3, control cylinder 31, positioning seat 32. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] like Figure 2 , 3As shown, a tooth pressing tool for a balancing shaft includes a positioning fixture and a tooth fixing mechanism. The positioning fixture is used to limit the position of the balancing shaft 101 to ensure that the key position 104 of the balancing shaft 101 is at a specific position; the tooth fixing mechanism is used to limit the position of the gear 102 to be assembled to ensure that the tooth groove position of the gear 102 can be adapted to the position of the key position 104 of the balancing shaft 101. After the positioning fixture and the positioning mechanism cooperate to limit the position of the balancing shaft 101 and the gear 102, the gear 102 and the balancing shaft 101 can be assembled by tooth pressing using a hydraulic mechanism (hydraulic press, stamping machine, etc.).

[0030] In order to achieve the function of limiting and fixing the balancing shaft 101, the positioning fixture provided in the utility model includes a base 1 for placing the balancing shaft 101, a positioning protrusion 11 and a fixed clamp block 2 provided on the base 1 and adapted to the key position 104 of the balancing shaft 101, and the fixed clamp block 2 is movably provided to fix the balancing shaft 101 between the base 1 and the fixed clamp block 2. The base 1 is used to fix and install other components, and any structure can be adopted, such as a straight plate structure, a circular plate structure, etc. Since the gear 102 is pressed from top to bottom onto the balancing shaft 101 during the tooth pressing process of the balancing shaft 101 and the gear 102, for this reason, the balancing shaft 101 is fixed vertically between the base 1 and the fixed clamp block 2. Therefore, in order to ensure that the base 1 has sufficient bearing capacity with the work surface during the vertical placement process, the base 1 may be a ⊥ plate structure or an L-shaped plate structure or other structures provided with horizontal supports and vertical supports. In this embodiment, if Figure 2-6 As shown, the base 1 adopts a ⊥ plate-shaped structure, the balancing shaft 101 is placed on one side of the vertical plate of the base 1 and placed vertically, and the fixed clamp block 2 is arranged on the same side of the balancing shaft 101 to fix the balancing shaft 101 on the base 1. The structure of the positioning protrusion 11 is adapted to the structure of the key position 104 of the balancing shaft 101; in this embodiment, since the key position 104 of the balancing shaft 101 is a rectangular notch structure, for this reason, the positioning protrusion 11 provided by the utility model includes a convex strip 111 of a rectangular body structure adapted to the key position 104 and a sliding seat 112 arranged behind the convex strip 111, the sliding seat 112 is connected to the vertical plate of the base 1, and the convex strip 111 is arranged vertically along its length direction. The arrangement of the convex strip 111 enables the balancing shaft 101 to be adjusted in the vertical direction when the key position 104 is clamped with the convex strip 111, so as to ensure accurate positioning. After the balancing shaft 101 is in place, it needs to be fixed by the fixed clamp block 2 to ensure that the balancing shaft 101 will not shift during the tooth pressing process.

[0031] Since the tooth pressing process is from top to bottom, and the fixing clamp 2 applies pressure to the balancing shaft 101 in the horizontal direction to fix the balancing shaft 101 on the base 1, this clamping method is not conducive to vertically fixing the balancing shaft 101. Since the balancing shaft 101 of this structure is provided with a counterweight block 103, the utility model is combined with the structure of the balancing shaft 101, and is also provided with a mounting slot 12 and a supporting slot 13. The mounting slot 12 and the supporting slot 13 are both fixed on one side of the vertical plate of the base 1 for placing the balancing shaft 101. Figure 4 As shown, the mounting slot 12 is arranged at the top, and the supporting slot 13 is arranged at the bottom and fits the mounting slot 12. The mounting slot 12 is adapted to the counterweight 103 at the upper end of the balancing shaft 101, and the counterweight 103 is embedded in the mounting slot 12. The supporting slot 13 is adapted to the axial diameter of the balancing shaft 101 for placing the balancing shaft 101, so that the depth of the supporting slot 13 is smaller than the depth of the mounting slot 12. When the counterweight 103 is placed in the mounting slot 12, the fan-shaped side wall of the counterweight 103 fits the outer wall of the supporting slot. When the balancing shaft 101 is subjected to downward extrusion force, the entire balancing shaft 101 can be vertically limited by the supporting slot 13, thereby avoiding the problem of vertical movement of the balancing shaft 101 during the tooth pressing process.

[0032] Due to the arrangement of the installation slot 12 and the support slot 13, the entire balancing shaft 101 is lifted off the vertical plate of the base 1. In order to enable the balancing shaft 101 to be arranged vertically, the utility model further comprises a fixed seat 14 and a movable seat 16. Figure 5 , 6As shown, the fixed seat 14 and the movable seat 16 are arranged at intervals along the length direction of the balancing shaft 101, and the fixed seat 14 is arranged close to the supporting through groove 13. The balancing shaft 101 is placed on the fixed seat 14 and the movable seat 16 and fixed by the fixed clamping block 2. The fixed seat 14 and the movable seat 16 correspond to the two raised variable diameter cylindrical structures 105 on the balancing shaft 101, which makes the cylindrical structure 105 more stable during the placement process. The utility model includes a through groove structure that is set from the notch to the bottom of the groove on the fixed seat 14 and the movable seat 16. The balancing shaft 101 is placed on the two through groove structures. The through groove structure can be a V-shaped groove structure, or an inverted isosceles trapezoidal structure, etc., which is convenient for the placement of the cylindrical structure 105. Due to the structural limitation of the balancing shaft 101, the corresponding positioning protrusion 11 is set between the fixed seat 14 and the movable seat 16. Since the balancing shaft 101 of this structure has differences in length or key position 104 structure, in order to make the entire tooling adaptable to balancing shafts 101 of different lengths and / or different key position 104 structures, the positioning protrusion 11 and the movable seat 16 of the utility model are both arranged in the strip groove 17 opened on the base 1, and the length direction of the strip groove 17 is arranged along the length direction of the balancing shaft 101, and the positioning protrusion 11 and the movable seat 16 slide or are fixed along the strip groove 17. The sliding seat 112 of the positioning protrusion 11 and the strip groove 17 slide and are fixed by bolts, so the balancing shaft 101 with different key position 104 structure can be positioned by replacing the positioning protrusion 11 to achieve the positioning of the balancing shaft 101 of other structures; or when the position of the key position 104 of the balancing shaft 101 is shorter than the position of the counterweight block 103 below, the positioning of the balancing shaft 101 of this structure can be achieved by sliding the positioning protrusion 11. When the length of the entire balancing shaft 101 is increased, the balancing shaft 101 can be vertically arranged by sliding the movable seat 16 to avoid positioning failure of the balancing shaft 101 .

[0033] After the balancing shaft 101 is put in place, it is necessary to control the fixed clamping block 2 to fix the balancing shaft 101. Theoretically, there can be one or more fixed clamping blocks 2, because the fixed clamping blocks 2 provide horizontal clamping force to prevent the balancing rod from being separated from the base 1. The utility model is combined with the length of the balancing shaft 101 to set two fixed clamping blocks 2, and the two fixed clamping blocks 2 are arranged at intervals. Theoretically, the two fixed clamping blocks 2 can squeeze the balancing shaft 101 at any position, and it is only necessary to ensure that the pressure applied by the two fixed clamping blocks 2 to the balancing shaft 101 is the same. In the utility model, for the convenience of use, such as Figure 4 , 5As shown, the two fixed clamps 2 are respectively matched with the fixed seat 14 and the movable seat 16, so that the clamping force is easier to control. Specifically, each fixed clamp 2 is hinged with a movable rod 21, and the movable rod 21 is hinged with a fixed column 23 provided on the base 1. The fixed clamp 2 is provided with a driving member for driving it to swing, and the fixed clamp 2 swings to fix the balance shaft 101. In order to ensure the stability of the movement of the fixed clamp 2, the fixed clamp 2 is a strip-shaped block structure, and two movable rods 21 are provided at the same time. The two movable rods 21 are respectively arranged on both sides of the fixed clamp 2 and hinged with the middle part of the fixed clamp 2, and the two movable rods 21 are hinged with the fixed column 23. Then the driving member drives one end of the fixed clamp 2 to move, which can drive the other end of the fixed clamp 2 to move toward the balance shaft 101, provide a horizontal extrusion force, and fix the balance shaft 101 on the base 1. The driving member can be any structure that can drive one end of the fixed clamp 2 to move, such as an electric telescopic rod, a telescopic cylinder 22, etc. In this embodiment, the driving member includes a moving rod 24, which is parallel to the fixed column 23 and hinged to the fixed clamp 2. The moving rod 24 is telescopic along the base 1 to drive the fixed clamp to swing. The moving rod 24 moves along the vertical plate direction (horizontal direction) of the vertical base 1, which can drive the fixed clamp 2 to swing. The moving rod 24 can be a screw rod, and a threaded rotating sleeve is sleeved on the screw rod. The rotating sleeve is coaxially arranged with the motor, and the rotation of the motor can realize the horizontal movement of the moving rod 24. In this embodiment, the moving rod 24 is fixed to the piston end of the telescopic cylinder 22 fixed on the base 1. The telescopic cylinder 22 drives the moving rod 24 to telescope when it works, which can realize the fixing or unlocking of the fixed clamp 2 to the balance shaft 101.

[0034] After the fixed clamp block 2 is clamped in place, the position of the gear 102 needs to be limited. For this purpose, the fixed gear mechanism is used to limit the position of the gear 102. Specifically, the fixed gear mechanism includes a positioning clamping tooth 3 that is plugged into the tooth groove of the gear 102. The positioning clamping tooth 3 is connected to the base 1 and is adapted to the position of the positioning protrusion 11. When the gear 102 is installed, it is sleeved on the upper end of the balance shaft 101. The gear 102 is rotated appropriately to ensure that the tooth groove of the gear 102 can be clamped by the positioning clamping tooth 3. Since the positions of the positioning clamping tooth 3 and the positioning protrusion 11 are limited according to the requirements, as long as the gear 102 and the positioning clamping tooth 3 are matched, it means that the key position 104 of the gear 102 and the balance shaft 101 are matched in place. At this time, the hydraulic mechanism can be used to press the gear.

[0035] In order to facilitate the insertion of the positioning latch 3 and the tooth groove of the gear 102, in the utility model, as Figure 2 , 3As shown in , 4, and 5, the positioning latch 3 is connected to the positioning seat 32 fixed on the base 1, and the positioning latch 3 is telescopically arranged on the positioning seat 32 along the radial direction of the gear 102. The positioning latch 3 can be telescopically arranged on the positioning seat 32 by means of spring telescopic movement, or other means can be adopted, as long as it is ensured that when the gear 102 is rotated and adjusted, the existence of the positioning latch 3 does not affect the rotation of the gear 102. In this embodiment, a control cylinder 31 is fixed on the positioning seat 32, and the piston section of the control cylinder 31 is fixed to the positioning latch 3, so that the control cylinder 31 can realize the telescopic movement of the positioning latch 3 when it works.

[0036] After the gear 102 is in place, the gear pressing operation can be performed. In order to make the supporting groove 13 and the fixing seat 14 have sufficient vertical supporting force, two parallel supporting rods 15 are also provided on the base 1 of the utility model. One end of the supporting rod 15 is fixed to the horizontal plate of the base 1, and the other end is contacted with the fixing seat 14. The supporting rod 15 can adopt a sleeved threaded rod and threaded sleeve structure. The threaded rod and the base 1 are fixed. Rotating the threaded sleeve can change the length of the entire supporting rod 15, which has a wider range of applications.

[0037] During the gear pressing process between the gear 102 and the balancing shaft 101, the pressing sleeve 106 of the hydraulic structure is embedded in the upper end of the balancing shaft 101 and abuts against the gear 102. The downward movement of the pressing sleeve 106 drives the gear 102 downward. The positioning tooth 3 has a certain vertical length, which ensures that the gear 102 can always be positioned by the positioning tooth 3 during the downward movement so as to complete the gear pressing operation.

[0038] Principle of the utility model:

[0039] Place the balancing shaft 101 to be processed on the base 1, ensure that the key position 104 of the balancing shaft 101 is engaged with the positioning protrusion 11, position the balancing shaft 101, and then work the two telescopic cylinders 22 to drive the fixed clamp 2 to swing and fix the balancing shaft 101 on the base 1. Sleeve the gear 102 to be assembled on the installation end of the balancing shaft 101, use the control cylinder 31 to drive the positioning clamp 3 to expand and contract, ensure the plug-in fit between the positioning clamp 3 and the tooth groove of the gear 102, fix the gear 102 in place, and then use the hydraulic mechanism to squeeze the gear 102, assemble the gear 102 and the balancing shaft 101, release the fixation of the balancing shaft 101, and complete the pressing assembly of the balancing shaft 101.

[0040] The utility model is based on a balancing shaft 101 with a specific structure, and is provided with a positioning fixture for positioning the balancing shaft 101 and a tooth fixing mechanism for positioning the gear 102, thereby ensuring that the positions of the gear 102 and the balancing shaft 101 before assembly can meet the requirements and ensuring the tooth pressing accuracy of the balancing shaft 101.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A gear pressing tool for a balancing shaft, characterized in that: It comprises a positioning fixture for defining a balancing shaft (101) and a tooth-fixing mechanism for defining a tooth groove position of a gear (102), The positioning fixture comprises a base (1) for placing the balancing shaft (101), a positioning protrusion (11) arranged on the base (1) and adapted to a key position (104) of the balancing shaft (101), and a fixed clamping block (2); the fixed clamping block (2) is movably arranged to fix the balancing shaft (101) between the base (1) and the fixed clamping block (2); The fixed gear mechanism comprises a positioning latch tooth (3) plugged into and matched with the tooth groove of the gear (102); the positioning latch tooth (3) is connected to the base (1) and is positionally matched with the positioning protrusion (11).

2. The gear pressing tool for a balancing shaft according to claim 1, characterized in that: The positioning latch teeth (3) are connected to a positioning seat (32) fixed on the base (1), and the positioning latch teeth (3) are telescopically arranged on the positioning seat (32) along the radial direction of the gear (102).

3. A gear pressing tool for a balancing shaft according to claim 1 or 2, characterized in that: A mounting through slot (12) matched with a counterweight (103) on the balancing shaft (101) close to the gear (102) and a supporting through slot (13) matched with the balancing shaft (101) are fixed on the base (1). The supporting through slot (13) is arranged on a side of the mounting through slot (12) away from the gear (102) and is consistent with the through slot direction of the mounting through slot (12). The counterweight (103) is embedded in the mounting slot and the fan-shaped side wall of the counterweight (103) is in contact with the outer side wall of the supporting slot.

4. The gear pressing tool for a balancing shaft according to claim 3, characterized in that: The base (1) is also provided with a fixed seat (14) and a movable seat (16) arranged at intervals along the length direction of the balancing shaft (101); the fixed seat (14) is arranged close to the supporting through slot (13); the balancing shaft (101) is placed on the fixed seat (14) and the movable seat (16) and fixed by a fixed clamping block (2).

5. The gear pressing tool for a balancing shaft according to claim 4, characterized in that: The fixed seat (14) and the movable seat (16) comprise through slot structures which are arranged with the slot opening narrowed toward the slot bottom, and the balancing shaft (101) is placed on the two through slot structures.

6. A gear pressing tool for a balancing shaft according to claim 4 or 5, characterized in that: The positioning protrusion (11) is arranged between the fixed seat (14) and the movable seat (16). The positioning protrusion (11) and the movable seat (16) are both arranged in a strip groove (17) provided on the base (1). The length direction of the strip groove (17) is arranged along the length direction of the balance shaft (101). The positioning protrusion (11) and the movable seat (16) slide or are fixed along the strip groove (17).

7. A gear pressing tool for a balancing shaft according to claim 1, 2, 4 or 5, characterized in that: There are two fixed clamping blocks (2), which are arranged at intervals. The fixed clamping blocks (2) are provided with a movable rod (21) which is hingedly arranged. The movable rod (21) is hingedly connected to a fixed column (23) arranged on the base (1). The fixed clamping blocks (2) are provided with a driving member for driving the fixed clamping blocks (2) to swing. The fixed clamping blocks (2) swing to fix the balancing shaft (101).

8. The gear pressing tool for a balancing shaft according to claim 7, characterized in that: The driving member comprises a moving rod (24), the moving rod (24) is parallel to the fixed column (23) and is hinged to the fixed clamping block (2), and the moving rod (24) is telescopic along the base (1) to drive the fixed clamping plate to swing.

9. The gear pressing tool for a balancing shaft according to claim 8, characterized in that: The moving rod (24) is fixed to the piston end of the telescopic cylinder (22) fixed on the base (1).

10. A gear pressing tool for a balancing shaft according to claim 4, 5, 8 or 9, characterized in that: It also comprises at least one support rod (15), one end of the support rod (15) is fixed to the base (1), and the other end is arranged in contact with the fixing seat (14).

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