CN219510015U

CN219510015U - Retainer with good lubricating effect

Info

Publication number: CN219510015U
Application number: CN202320119602.3U
Authority: CN
Inventors: 施俊其; 刘云; 施晨逸; 沈健; 陈敏
Original assignee: Wuxi Xizhu Plastic Co ltd
Current assignee: Wuxi Xizhu Plastic Co ltd
Priority date: 2023-01-13
Filing date: 2023-01-13
Publication date: 2023-08-11
Anticipated expiration: 2033-01-13

Abstract

The utility model discloses a retainer with good lubricating effect, which comprises a first retainer, a second retainer and a lubricating mechanism, wherein the first retainer is fixedly arranged at one end of the second retainer, a plurality of first half holes are formed in one end, close to the second retainer, of the first retainer, a plurality of second half holes are formed in one end, close to the first retainer, of the second retainer, and one first half hole and one corresponding second half hole form a roller placing hole together; the lubrication mechanism comprises oil storage tanks filled with lubricating oil and lubrication balls, a plurality of oil storage tanks are arranged on the first retainer, the number of the oil storage tanks is corresponding to the number of the first half holes, the oil storage tanks are provided with tank openings, the tank openings of each oil storage tank are communicated with the corresponding first half holes, the lubrication balls are slidably connected at the tank openings of each oil storage tank, and parts of the lubrication balls extend out from the tank openings of the oil storage tanks. The utility model can solve the problem of shorter service life of the bearing.

Description

Retainer with good lubricating effect

Technical Field

The utility model relates to the technical field of bearing accessories, in particular to a retainer with good lubricating effect.

Background

Cage, i.e. bearing cage, also called bearing cage, refers to a bearing part that partly encloses all or part of the rolling elements and moves therewith to isolate the rolling elements, typically also to guide and retain the rolling elements in the bearing. When the rolling bearing works, particularly when the load is complex and the rolling bearing rotates at a high speed, the retainer bears great centrifugal force, impact and vibration, and great sliding friction exists between the retainer and the rolling body, so that it is important to ensure that the retainer and the rolling body can be fully lubricated.

The existing retainer has poor lubricity in the running process of the bearing, so that the rollers can bear larger friction force in the rotating process, and the service life of the bearing is shorter.

Disclosure of Invention

In order to solve the problem that the service life of a bearing is short due to the fact that the roller receives larger friction force in the rotating process, the utility model provides the retainer with good lubricating effect.

The retainer with good lubricating effect provided by the utility model adopts the following technical scheme:

the retainer with good lubricating effect comprises a first retainer, a second retainer and a lubricating mechanism, wherein the first retainer is fixedly arranged at one end of the second retainer, a plurality of first half holes are formed in one end, close to the second retainer, of the first retainer, a plurality of second half holes are formed in one end, close to the first retainer, of the second retainer, the central axis of the first retainer coincides with the central axis of the second retainer, the number and the size of the first half holes are respectively corresponding to the number and the size of the second half holes, and one roller placing hole is formed by the first half holes and the corresponding second half holes; the lubricating mechanism comprises oil storage tanks filled with lubricating oil and lubricating balls, a plurality of the oil storage tanks are arranged on the first retainer, the number of the oil storage tanks is corresponding to the number of the first half holes, the oil storage tanks are provided with tank openings, each tank opening of each oil storage tank is communicated with the corresponding first half hole, each tank opening of each oil storage tank is in sliding connection with the lubricating balls, and parts of the lubricating balls extend out of the tank openings of the oil storage tanks.

By adopting the technical scheme, as the first retainer and the second retainer are fixedly arranged together, when in use, the roller is placed in the roller placing hole; when the bearing rotates, the outer surface of the roller is continuously contacted with the lubricating ball, and the lubricating ball is driven by the roller to rotate at the tank opening of the oil storage tank, so that lubricating oil in the oil storage tank is brought out, the lubricating effect of the retainer can be ensured all the time in the running process of the bearing, the friction force born by the roller in the rotating process is reduced, and the service life of the bearing is prolonged; meanwhile, under the action of centrifugal force, the first retainer and the second retainer are not mutually separated all the time, so that the structural stability of the retainers can be ensured.

Optionally, the first holder is fixedly provided with a positioning block, the second holder is provided with a positioning groove, and when the first holder and the second holder are fixedly installed together, the positioning block is correspondingly inserted into the positioning groove.

By adopting the technical scheme, when the first retainer and the second retainer are fixedly installed, the first retainer and the second retainer can be correspondingly installed together through the mutual matching of the positioning blocks and the positioning grooves, and the first retainer and the second retainer are fixedly connected; the setting of locating piece and constant head tank can play the effect of location when the installation for first half hole and second half hole can accurately correspond and constitute the roller jointly and place the hole, on the other hand can strengthen the joint strength between first holder and the second holder, thereby promote the structural strength of holder, are favorable to prolonging the life of bearing.

Optionally, the volume of the lubricating ball protruding outside the oil storage tank is smaller than the volume located inside the oil storage tank.

Through adopting above-mentioned technical scheme, because the lubrication ball is located the inside volume of batch oil tank and is great relatively, be convenient for block lubricating oil in the case mouth department of batch oil tank, the effect that blocks here is not blockked completely, but reduces the instantaneous flow that lubricating oil flows from the case mouth of batch oil tank to a certain extent to both can ensure the lubrication effect of holder, can not spill over too much lubricating oil again, reduce the extravagant possibility of taking place lubricating oil.

Optionally, a first annular groove is formed in the first holding frame, the central axis of the first annular groove coincides with the central axis of the first holding frame, and the first annular groove is communicated with each first half hole; the second retainer is provided with a second annular groove, the central axis of the second annular groove coincides with the central axis of the second retainer, and the second annular groove is communicated with each second half hole; the notch of the first annular groove is opposite to the notch of the second annular groove, and when the first retainer and the second retainer are fixedly installed together, the first annular groove and the second annular groove are correspondingly combined into an annular oil through hole.

Through adopting above-mentioned technical scheme, at in-service use's in-process, a plurality of rollers of installation on the holder, after the bearing is at the in-process of operation, lubricating oil flows in from the batch oil tank, on the one hand can play the lubrication action to the roller that this batch oil tank corresponds, on the other hand, still can place in the hole enters into annular oil through the roller to can play the lubrication action to other each rollers, make the lubrication effect of the roller that is located everywhere of holder more even, reduce the lubrication effect that is located the roller of somewhere of holder and be poor possible.

Optionally, the first retainer is provided with a mounting groove, the mounting groove is located at one end of the first retainer away from the second retainer, the mounting groove is communicated with the first half hole, and the oil storage tank is fixedly mounted in the mounting groove through a connecting piece.

By adopting the technical scheme, the oil storage tank can be positioned in the installation groove by arranging the installation groove, so that the possibility of influencing the normal use of the bearing due to the fact that the oil storage tank is arranged on the surface of the first retainer is reduced; the setting of connecting piece can be very convenient with oil storage tank fixed mounting in the mounting groove inside, reduces the oil storage tank and takes place the possibility of drunkenness in the mounting groove inside, is favorable to strengthening the structural stability of bearing.

Optionally, the connecting piece includes joint piece and spring, be equipped with the sliding tray on the opposite lateral wall of mounting groove, the one end fixed connection of spring is in the tank bottom of sliding tray, the other end fixed connection of spring the joint piece, joint piece sliding connection is in on the inner wall of sliding tray, be equipped with the draw-in groove on the lateral wall of oil storage tank, works as the oil storage tank is installed in the mounting groove, joint piece joint is in the draw-in groove, the spring is in compression state.

Through adopting above-mentioned technical scheme, when needs are installed the batch oil tank in the mounting groove, aim at the batch oil tank and insert and establish in the mounting groove, the lateral wall of batch oil tank pushes down the joint piece, make the joint piece remove to the tank bottom that is close to the sliding tray, the spring is compressed this moment, remove the batch oil tank to the direction that is close to the mounting groove tank bottom, when the joint piece aims at the clamping groove, under the elasticity effect of spring, the joint piece removes to the direction that keeps away from the sliding tray tank bottom, get into in the clamping groove and with the inner wall joint of clamping groove, thereby accomplish the installation, the spring still is in compressed state this moment, can be with batch oil tank fixed mounting in the mounting groove through above-mentioned process, easy operation is convenient, can reduce the batch oil tank and take place the possibility of drunkenness in the mounting groove inside.

Optionally, the joint piece includes slider and arc arch, slider sliding connection is in on the inner wall of sliding tray, one side of slider with the spring is kept away from the one end fixed connection of the tank bottom of mounting groove, the slider keep away from one side of spring with arc arch fixed connection, the cross-section of draw-in groove is the arc, the draw-in groove with the protruding adaptation of arc, works as oil storage tank fixed mounting is in when the mounting groove, the arc arch be located inside the draw-in groove and with draw-in groove inner wall joint, the spring is in compressed state.

Through adopting above-mentioned technical scheme, through the joint effect between arc protruding and the draw-in groove inner wall, can be very conveniently with oil storage tank fixed mounting in the mounting groove inside, reduce the oil storage tank and take place the possibility of drunkenness in the mounting groove inside.

Optionally, a guide groove is formed in the side wall of the sliding groove, a guide block is fixedly connected to the side wall of the sliding block, and the guide block is slidably connected in the guide groove.

By adopting the technical scheme, the sliding connection between the guide block and the guide groove can play a role in guiding the movement of the sliding block, so that the possibility of deflection of the sliding block in the moving process is reduced.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. because the first retainer and the second retainer are fixedly arranged together, when in use, the roller is placed in the roller placing hole; when the bearing rotates, the outer surface of the roller is continuously contacted with the lubricating ball, and the lubricating ball is driven by the roller to rotate at the tank opening of the oil storage tank, so that lubricating oil in the oil storage tank is brought out, the lubricating effect of the retainer can be ensured all the time in the running process of the bearing, the friction force born by the roller in the rotating process is reduced, and the service life of the bearing is prolonged; meanwhile, under the action of centrifugal force, the first retainer and the second retainer are not mutually separated all the time, so that the structural stability of the retainers can be ensured.

2. In the in-process of in-service use, install a plurality of rollers on the holder, when the bearing in the in-process of operation, after lubricating oil flows out from the oil storage tank, on the one hand can play the lubrication action to the roller that this oil storage tank corresponds, on the other hand, still can enter into in the annular oil through hole through the roller placing hole to can play the lubrication action to other each rollers, make the lubrication effect of the roller that is located everywhere of holder more even, reduce the lubrication effect that is located the roller of somewhere of holder and perhaps relatively poor.

Drawings

Fig. 1 is a schematic structural view of a retainer with good lubrication effect in an embodiment of the present utility model.

Fig. 2 is a schematic structural diagram showing a matching relationship between a positioning block and a positioning groove in an embodiment of the present utility model.

Fig. 3 is a schematic view of a lubrication mechanism embodied in an embodiment of the present utility model.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is a schematic view showing the structure of a first annular groove in an embodiment of the present utility model.

Fig. 6 is a schematic view of a second annular groove embodied in an embodiment of the present utility model.

Reference numerals illustrate:

1. a first holder; 2. a second holder; 3. a first half-hole; 4. a positioning block; 5. a second half-hole; 6. a positioning groove; 7. a roller placement hole; 8. an oil storage tank; 9. a lubrication ball; 10. a mounting groove; 11. a spring; 12. a sliding groove; 13. arc-shaped bulges; 14. a slide block; 15. a clamping groove; 16. a guide groove; 17. a guide block; 18. a first annular groove; 19. a second annular groove; 20. annular oil hole.

Description of the embodiments

The utility model is described in further detail below with reference to fig. 1-6.

The embodiment of the utility model discloses a retainer with good lubricating effect.

Referring to fig. 1, a retainer with good lubrication effect includes a first retainer 1, a second retainer 2, and a lubrication mechanism.

Referring to fig. 1 and 2, a first holder 1 is fixedly installed at one end of a second holder 2. A plurality of first half holes 3 are formed in one end, close to the second retainer 2, of the first retainer 1, a plurality of positioning blocks 4 are fixedly connected to one end, close to the second retainer 2, of the first retainer 1, and the positioning blocks 4 and the first half holes 3 are alternately arranged; a plurality of second half holes 5 are formed in one end, close to the first retainer 1, of the second retainer 2, the number and the size of the second half holes 5 are corresponding to those of the first half holes 3, a plurality of positioning grooves 6 are formed in one end, close to the first retainer 1, of the second retainer 2, the size and the number of the positioning grooves 6 are corresponding to those of the positioning blocks 4, and the positioning grooves 6 and the second half holes 5 are alternately formed. When the first retainer 1 and the second retainer 2 are fixedly installed together, the central axis of the first retainer 1 coincides with the central axis of the second retainer 2, a positioning block 4 is correspondingly inserted into a positioning groove 6, and a first half hole 3 and a corresponding second half hole 5 form a roller placing hole 7 for placing a roller together.

When the first retainer 1 and the second retainer 2 are fixedly installed, the first retainer 1 and the second retainer 2 can be correspondingly installed together through the mutual matching of the positioning block 4 and the positioning groove 6, so that the positioning function is realized, and the first half hole 3 and the second half hole 5 can be accurately and correspondingly and jointly formed into a roller placing hole 7; and then the first retainer 1 and the second retainer 2 are further fixedly connected, and the connection strength between the first retainer 1 and the second retainer 2 can be enhanced by the plug-in fit of the positioning block 4 and the positioning groove 6, so that the structural strength of the retainer is improved, and the service life of the bearing is prolonged.

Referring to fig. 1 and 3, lubrication mechanisms are provided on both the first holder 1 and the second holder 2. The lubrication mechanism comprises an oil storage tank 8 filled with lubricating oil and a first holder 1 provided with the oil storage tank 8 and a lubricating ball 9, and a plurality of mounting grooves 10 for arranging the oil storage tank 8 are formed in the first holder 1 in order to reduce the possibility of affecting the normal use of the bearing due to the fact that the oil storage tank 8 is mounted on the surface of the first holder 1. The quantity of mounting groove 10 corresponds the setting with the quantity of first half hole 3, and mounting groove 10 is located the one end that second holder 2 was kept away from to first holder 1, and the cross-section of mounting groove 10 is circular to mounting groove 10 and first half hole 3 intercommunication, an oil storage tank 8 of every mounting groove 10 inside all through connecting piece fixed mounting.

Referring to fig. 1 and 3, the oil reservoirs 8 are provided with tank openings, each tank opening of the oil reservoir 8 being directed towards and communicating with a corresponding first half-hole 3. The tank opening of each oil tank 8 is in sliding connection with a lubrication ball 9, part of the lubrication ball 9 extends out of the tank opening of the oil tank 8, and the volume of the lubrication ball 9 extending out of the oil tank 8 is smaller than the volume of the oil tank 8.

Because the lubrication ball 9 is located the inside volume of oil storage tank 8 relatively great, be convenient for block lubricating oil in the case mouth department of oil storage tank 8, the effect of blockking here is not completely blockked, but reduces the instantaneous flow that lubricating oil flows from the case mouth of oil storage tank 8 to a certain extent to both can ensure the lubrication effect of holder, can not spill over too much lubricating oil again, reduce the possibility that takes place the lubricating oil extravagant.

Referring to fig. 1, 3 and 4, the connector includes a snap block and a spring 11. The opposite side walls of the mounting groove 10 are provided with sliding grooves 12, one end of the spring 11 is fixedly connected to the bottom of the sliding grooves 12, and the other end of the spring 11 is fixedly connected with a clamping block. The clamping block comprises a sliding block 14 and an arc-shaped protrusion 13, wherein the sliding block 14 is slidably connected to the inner wall of the sliding groove 12, one side of the sliding block 14 is fixedly connected with one end of the spring 11, which is far away from the groove bottom of the mounting groove 10, and one side of the sliding block 14, which is far away from the spring 11, is fixedly connected with the arc-shaped protrusion 13. The outside wall of the oil storage tank 8 is provided with a clamping groove 15, the cross section of the clamping groove 15 is arc-shaped, the clamping groove 15 is matched with the arc-shaped bulge 13, when the oil storage tank 8 is fixedly installed in the installation groove 10, the arc-shaped bulge 13 is positioned inside the clamping groove 15 and is clamped with the inner wall of the clamping groove 15, and the spring 11 is in a compressed state.

When the oil storage tank 8 is required to be installed in the installation groove 10, the oil storage tank 8 is aligned and inserted in the installation groove 10, the oil storage tank 8 is pushed, the arc-shaped protrusion 13 is extruded in the process of continuously entering the installation groove 10, the sliding block 14 moves towards the groove bottom close to the sliding groove 12, the spring 11 is compressed at the moment, the oil storage tank 8 continues to move towards the installation groove 10 until the arc-shaped protrusion 13 is aligned with the clamping groove 15, under the action of the elastic force of the spring 11, the sliding block 14 moves towards the direction far away from the groove bottom of the sliding groove 12, the arc-shaped protrusion 13 is driven, the arc-shaped protrusion 13 enters the inside of the clamping groove 15 and is clamped with the inner wall of the clamping groove 15, and the clamping is completed, so that the spring 11 is still in a compressed state. Through the process, the oil storage tank 8 can be fixedly installed in the installation groove 10, the possibility that the oil storage tank 8 moves inside the installation groove 10 is reduced, the operation is simple and convenient, and the structural stability of the bearing is enhanced.

Referring to fig. 3 and 4, in order to guide the movement of the slider 14, thereby reducing the possibility of the slider 14 deflecting when moving inside the sliding groove 12, a guide groove 16 is provided on a side wall of the sliding groove 12, a guide block 17 is fixedly connected to a side wall of the slider 14, and the guide block 17 is slidably connected in the guide groove 16.

Referring to fig. 1, 5 and 6, the lubrication mechanism on the second cage 2 is disposed in the same manner as the lubrication mechanism on the first cage 1, and the lubrication mechanism on the second cage 2 is disposed in a pair with the lubrication mechanism on the first cage 1. Through the arrangement, the lubrication effect between the retainer and the roller can be further guaranteed, and the service life of the bearing is prolonged.

Referring to fig. 3, 5 and 6, the first retainer 1 is provided with a first annular groove 18, the cross section of the first annular groove 18 is arc-shaped, the central axis of the first annular groove 18 coincides with the central axis of the first retainer 1, and the first annular groove 18 is communicated with each first half hole 3; the second retainer 2 is provided with a second annular groove 19, the section of the second annular groove 19 is arc-shaped, the central axis of the second annular groove 19 coincides with the central axis of the second retainer 2, and the second annular groove 19 is communicated with each second half hole 5; the size of the first annular groove 18 is corresponding to that of the second annular groove 19, the notch of the first annular groove 18 is opposite to that of the second annular groove 19, and when the first retainer 1 and the second retainer 2 are fixedly installed together, the first annular groove 18 and the second annular groove 19 are correspondingly combined into an annular oil through hole 20.

When in actual use, after the lubricating oil in each oil storage tank 8 flows out of the bearing in the running process, on one hand, the lubricating effect can be achieved on the rollers corresponding to the oil storage tanks 8, and on the other hand, the lubricating oil can also enter the annular oil through holes 20 through the roller placing holes 7, so that the lubricating effect on other rollers can be achieved, the lubricating effect on the rollers located at the positions of the retainer is more uniform, and the possibility that the lubricating effect on the rollers located at the positions of the retainer is poor is reduced.

The implementation principle of the retainer with good lubrication effect provided by the embodiment of the utility model is as follows:

through the cooperation of locating piece 4 and constant head tank 6, install first holder 1 and second holder 2 together to carry out further fixed connection between first holder 1 and the second holder 2, make difficult separation, the stable in structure of first holder 1 and second holder 2.

In use, the rollers are placed in the corresponding roller placement holes 7. When the bearing rotates, the outer surface of the roller can be continuously contacted with the lubricating ball 9, the lubricating ball 9 is driven by the roller to rotate at the box opening of the oil storage box 8, so that the lubricating oil in the oil storage box 8 is taken out, the roller in the corresponding roller placing hole 7 can be lubricated on the one hand, the annular oil through holes 20 can flow to the roller placing holes 7 on the other hand, the roller in the bearing can be lubricated, the lubrication effect between the retainer and the roller can be always guaranteed in the bearing operation process, the friction force born by the roller in the rotation process is reduced, and the service life of the bearing is prolonged.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims

1. The utility model provides a effectual holder of lubrication, its characterized in that: the roller bearing device comprises a first retainer (1), a second retainer (2) and a lubricating mechanism, wherein the first retainer (1) is fixedly arranged at one end of the second retainer (2), a plurality of first half holes (3) are formed in one end, close to the second retainer (2), of the first retainer (1), a plurality of second half holes (5) are formed in one end, close to the first retainer (1), of the second retainer (2), the central axis of the first retainer (1) coincides with the central axis of the second retainer (2), the number and the size of the first half holes (3) are correspondingly arranged with the number and the size of the second half holes (5), and one roller bearing hole (7) is formed by the first half holes (3) and the corresponding second half holes (5) together; the lubricating mechanism comprises an oil storage tank (8) filled with lubricating oil and a lubricating ball (9), a plurality of the oil storage tanks (8) are arranged on the first retainer (1), the number of the oil storage tanks (8) is corresponding to the number of the first half holes (3), the oil storage tanks (8) are provided with tank openings, each tank opening of the oil storage tanks (8) is communicated with the corresponding first half holes (3), each tank opening of the oil storage tanks (8) is in sliding connection with the lubricating ball (9), and parts of the lubricating balls (9) extend out from the tank openings of the oil storage tanks (8).

2. A lubricated good cage according to claim 1, wherein: the positioning device is characterized in that a positioning block (4) is fixedly arranged on the first retainer (1), a positioning groove (6) is formed in the second retainer (2), and when the first retainer (1) and the second retainer (2) are fixedly installed together, the positioning block (4) is correspondingly inserted into the positioning groove (6).

3. A lubricated good cage according to claim 1, wherein: the volume of the lubricating ball (9) extending out of the oil storage tank (8) is smaller than the volume of the lubricating ball inside the oil storage tank (8).

4. A lubricated good cage according to claim 1, wherein: the first retainer (1) is provided with a first annular groove (18), the central axis of the first annular groove (18) coincides with the central axis of the first retainer (1), and the first annular groove (18) is communicated with each first half hole (3); the second retainer (2) is provided with a second annular groove (19), the central axis of the second annular groove (19) coincides with the central axis of the second retainer (2), and the second annular groove (19) is communicated with each second half hole (5); the notch of the first annular groove (18) is opposite to the notch of the second annular groove (19), and when the first retainer (1) and the second retainer (2) are fixedly installed together, the first annular groove (18) and the second annular groove (19) are correspondingly combined into an annular oil through hole (20).

5. A lubricated good cage according to claim 1, wherein: the oil storage tank is characterized in that mounting grooves (10) are formed in the first retainer (1), the mounting grooves (10) are formed in one end, far away from the second retainer (2), of the first retainer (1), the mounting grooves (10) are communicated with the first half holes (3), and the oil storage tank (8) is fixedly mounted in the mounting grooves (10) through connecting pieces.

6. A well-lubricated cage according to claim 5, wherein: the connecting piece comprises a clamping block and a spring (11), wherein a sliding groove (12) is formed in the opposite side wall of the mounting groove (10), one end of the spring (11) is fixedly connected to the bottom of the sliding groove (12), the other end of the spring (11) is fixedly connected to the clamping block, the clamping block is slidably connected to the inner wall of the sliding groove (12), a clamping groove (15) is formed in the outer side wall of the oil storage tank (8), and when the oil storage tank (8) is mounted in the mounting groove (10), the clamping block is clamped in the clamping groove (15), and the spring (11) is in a compressed state.

7. A lubricated good cage according to claim 6, wherein: the clamping block comprises a sliding block (14) and an arc-shaped protrusion (13), wherein the sliding block (14) is slidably connected to the inner wall of the sliding groove (12), one side of the sliding block (14) is fixedly connected with one end of the spring (11) away from the groove bottom of the mounting groove (10), one side of the sliding block (14) away from the spring (11) is fixedly connected with the arc-shaped protrusion (13), the cross section of the clamping groove (15) is arc-shaped, the clamping groove (15) is matched with the arc-shaped protrusion (13), and when the oil storage tank (8) is fixedly installed in the mounting groove (10), the arc-shaped protrusion (13) is positioned inside the clamping groove (15) and is clamped with the inner wall of the clamping groove (15), and the spring (11) is in a compressed state.

8. A lubricated good cage according to claim 7, wherein: the side wall of the sliding groove (12) is provided with a guide groove (16), the side wall of the sliding block (14) is fixedly connected with a guide block (17), and the guide block (17) is slidably connected in the guide groove (16).